package de.pixart.messenger.services;

import android.annotation.SuppressLint;
import android.annotation.TargetApi;
import android.app.AlarmManager;
import android.app.NotificationManager;
import android.app.PendingIntent;
import android.app.Service;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.content.SharedPreferences;
import android.database.ContentObserver;
import android.graphics.Bitmap;
import android.media.AudioManager;
import android.net.ConnectivityManager;
import android.net.NetworkInfo;
import android.net.Uri;
import android.os.Binder;
import android.os.Build;
import android.os.Bundle;
import android.os.Environment;
import android.os.IBinder;
import android.os.PowerManager;
import android.os.PowerManager.WakeLock;
import android.os.SystemClock;
import android.os.Vibrator;
import android.preference.PreferenceManager;
import android.provider.ContactsContract;
import android.security.KeyChain;
import android.support.annotation.BoolRes;
import android.support.annotation.IntegerRes;
import android.support.v4.app.RemoteInput;
import android.util.DisplayMetrics;
import android.util.Log;
import android.util.LruCache;
import android.util.Pair;

import net.java.otr4j.OtrException;
import net.java.otr4j.session.Session;
import net.java.otr4j.session.SessionID;
import net.java.otr4j.session.SessionImpl;
import net.java.otr4j.session.SessionStatus;

import org.openintents.openpgp.IOpenPgpService2;
import org.openintents.openpgp.util.OpenPgpApi;
import org.openintents.openpgp.util.OpenPgpServiceConnection;

import java.math.BigInteger;
import java.net.URL;
import java.security.SecureRandom;
import java.security.cert.CertificateException;
import java.security.cert.X509Certificate;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Calendar;
import java.util.Collection;
import java.util.Collections;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Hashtable;
import java.util.Iterator;
import java.util.List;
import java.util.ListIterator;
import java.util.Locale;
import java.util.Map;
import java.util.concurrent.CopyOnWriteArrayList;
import java.util.concurrent.atomic.AtomicBoolean;
import java.util.concurrent.atomic.AtomicLong;

import de.duenndns.ssl.MemorizingTrustManager;
import de.pixart.messenger.Config;
import de.pixart.messenger.R;
import de.pixart.messenger.crypto.PgpDecryptionService;
import de.pixart.messenger.crypto.PgpEngine;
import de.pixart.messenger.crypto.axolotl.AxolotlService;
import de.pixart.messenger.crypto.axolotl.FingerprintStatus;
import de.pixart.messenger.crypto.axolotl.XmppAxolotlMessage;
import de.pixart.messenger.entities.Account;
import de.pixart.messenger.entities.Blockable;
import de.pixart.messenger.entities.Bookmark;
import de.pixart.messenger.entities.Contact;
import de.pixart.messenger.entities.Conversation;
import de.pixart.messenger.entities.DownloadableFile;
import de.pixart.messenger.entities.Message;
import de.pixart.messenger.entities.MucOptions;
import de.pixart.messenger.entities.MucOptions.OnRenameListener;
import de.pixart.messenger.entities.Presence;
import de.pixart.messenger.entities.PresenceTemplate;
import de.pixart.messenger.entities.Roster;
import de.pixart.messenger.entities.ServiceDiscoveryResult;
import de.pixart.messenger.entities.Transferable;
import de.pixart.messenger.entities.TransferablePlaceholder;
import de.pixart.messenger.generator.AbstractGenerator;
import de.pixart.messenger.generator.IqGenerator;
import de.pixart.messenger.generator.MessageGenerator;
import de.pixart.messenger.generator.PresenceGenerator;
import de.pixart.messenger.http.AesGcmURLStreamHandlerFactory;
import de.pixart.messenger.http.HttpConnectionManager;
import de.pixart.messenger.parser.AbstractParser;
import de.pixart.messenger.parser.IqParser;
import de.pixart.messenger.parser.MessageParser;
import de.pixart.messenger.parser.PresenceParser;
import de.pixart.messenger.persistance.DatabaseBackend;
import de.pixart.messenger.persistance.FileBackend;
import de.pixart.messenger.ui.SettingsActivity;
import de.pixart.messenger.ui.UiCallback;
import de.pixart.messenger.utils.ConversationsFileObserver;
import de.pixart.messenger.utils.CryptoHelper;
import de.pixart.messenger.utils.ExceptionHelper;
import de.pixart.messenger.utils.MimeUtils;
import de.pixart.messenger.utils.Namespace;
import de.pixart.messenger.utils.OnPhoneContactsLoadedListener;
import de.pixart.messenger.utils.PRNGFixes;
import de.pixart.messenger.utils.PhoneHelper;
import de.pixart.messenger.utils.ReplacingSerialSingleThreadExecutor;
import de.pixart.messenger.utils.Resolver;
import de.pixart.messenger.utils.SerialSingleThreadExecutor;
import de.pixart.messenger.utils.XmppUri;
import de.pixart.messenger.xml.Element;
import de.pixart.messenger.xmpp.OnBindListener;
import de.pixart.messenger.xmpp.OnContactStatusChanged;
import de.pixart.messenger.xmpp.OnIqPacketReceived;
import de.pixart.messenger.xmpp.OnKeyStatusUpdated;
import de.pixart.messenger.xmpp.OnMessageAcknowledged;
import de.pixart.messenger.xmpp.OnMessagePacketReceived;
import de.pixart.messenger.xmpp.OnPresencePacketReceived;
import de.pixart.messenger.xmpp.OnStatusChanged;
import de.pixart.messenger.xmpp.OnUpdateBlocklist;
import de.pixart.messenger.xmpp.Patches;
import de.pixart.messenger.xmpp.XmppConnection;
import de.pixart.messenger.xmpp.chatstate.ChatState;
import de.pixart.messenger.xmpp.forms.Data;
import de.pixart.messenger.xmpp.jid.InvalidJidException;
import de.pixart.messenger.xmpp.jid.Jid;
import de.pixart.messenger.xmpp.jingle.JingleConnectionManager;
import de.pixart.messenger.xmpp.jingle.OnJinglePacketReceived;
import de.pixart.messenger.xmpp.jingle.stanzas.JinglePacket;
import de.pixart.messenger.xmpp.mam.MamReference;
import de.pixart.messenger.xmpp.pep.Avatar;
import de.pixart.messenger.xmpp.stanzas.IqPacket;
import de.pixart.messenger.xmpp.stanzas.MessagePacket;
import de.pixart.messenger.xmpp.stanzas.PresencePacket;
import me.leolin.shortcutbadger.ShortcutBadger;

public class XmppConnectionService extends Service {

    static {
        URL.setURLStreamHandlerFactory(new AesGcmURLStreamHandlerFactory());
    }

    public static final String ACTION_REPLY_TO_CONVERSATION = "reply_to_conversations";
    public static final String ACTION_MARK_AS_READ = "mark_as_read";
    public static final String ACTION_CLEAR_NOTIFICATION = "clear_notification";
    public static final String ACTION_TRY_AGAIN = "try_again";
    public static final String ACTION_DISMISS_ERROR_NOTIFICATIONS = "dismiss_error";
    public static final String ACTION_IDLE_PING = "idle_ping";
    public static final String ACTION_GCM_TOKEN_REFRESH = "gcm_token_refresh";
    public static final String ACTION_GCM_MESSAGE_RECEIVED = "gcm_message_received";
    private static final String ACTION_MERGE_PHONE_CONTACTS = "merge_phone_contacts";
    private final SerialSingleThreadExecutor mFileAddingExecutor = new SerialSingleThreadExecutor("FileAdding");
    private final SerialSingleThreadExecutor mVideoCompressionExecutor = new SerialSingleThreadExecutor("VideoCompression");
    private final SerialSingleThreadExecutor mDatabaseWriterExecutor = new SerialSingleThreadExecutor("DatabaseWriter");
    private final SerialSingleThreadExecutor mDatabaseReaderExecutor = new SerialSingleThreadExecutor("DatabaseReader");
    private final IBinder mBinder = new XmppConnectionBinder();
    private final List<Conversation> conversations = new CopyOnWriteArrayList<>();
    private final IqGenerator mIqGenerator = new IqGenerator(this);
    private final List<String> mInProgressAvatarFetches = new ArrayList<>();
    private final HashSet<Jid> mLowPingTimeoutMode = new HashSet<>();
    public DatabaseBackend databaseBackend;
    private ReplacingSerialSingleThreadExecutor mContactMergerExecutor = new ReplacingSerialSingleThreadExecutor(true);
    private WakeLock wakeLock;
    private long mLastActivity = 0;
    private NotificationManager mNotifyManager;
    AbstractConnectionManager mAbstractConnectionManager;

    private ContentObserver contactObserver = new ContentObserver(null) {
        @Override
        public void onChange(boolean selfChange) {
            super.onChange(selfChange);
            Intent intent = new Intent(getApplicationContext(),
                    XmppConnectionService.class);
            intent.setAction(ACTION_MERGE_PHONE_CONTACTS);
            startService(intent);
        }
    };
    public FileBackend fileBackend = new FileBackend(this);
    private MemorizingTrustManager mMemorizingTrustManager;
    private NotificationService mNotificationService = new NotificationService(this);
    private ShortcutService mShortcutService = new ShortcutService(this);
    private AtomicBoolean mInitialAddressbookSyncCompleted = new AtomicBoolean(false);
    private AtomicBoolean mForceForegroundService = new AtomicBoolean(false);
    private OnMessagePacketReceived mMessageParser = new MessageParser(this);
    private OnPresencePacketReceived mPresenceParser = new PresenceParser(this);
    private IqParser mIqParser = new IqParser(this);
    private OnIqPacketReceived mDefaultIqHandler = new OnIqPacketReceived() {
        @Override
        public void onIqPacketReceived(Account account, IqPacket packet) {
            if (packet.getType() != IqPacket.TYPE.RESULT) {
                Element error = packet.findChild("error");
                String text = error != null ? error.findChildContent("text") : null;
                if (text != null) {
                    Log.d(Config.LOGTAG, account.getJid().toBareJid() + ": received iq error - " + text);
                }
            }
        }
    };
    private MessageGenerator mMessageGenerator = new MessageGenerator(this);
    private PresenceGenerator mPresenceGenerator = new PresenceGenerator(this);
    private List<Account> accounts;
    private JingleConnectionManager mJingleConnectionManager = new JingleConnectionManager(
            this);
    public OnContactStatusChanged onContactStatusChanged = new OnContactStatusChanged() {

        @Override
        public void onContactStatusChanged(Contact contact, boolean online) {
            Conversation conversation = find(getConversations(), contact);
            if (conversation != null) {
                if (online) {
                    conversation.endOtrIfNeeded();
                    if (contact.getPresences().size() == 1) {
                        sendUnsentMessages(conversation);
                    }
                } else {
                    //check if the resource we are haveing a conversation with is still online
                    if (conversation.hasValidOtrSession()) {
                        String otrResource = conversation.getOtrSession().getSessionID().getUserID();
                        if (!(Arrays.asList(contact.getPresences().toResourceArray()).contains(otrResource))) {
                            conversation.endOtrIfNeeded();
                        }
                    }
                }
            }
        }
    };
    public HttpConnectionManager mHttpConnectionManager = new HttpConnectionManager(this);
    private AvatarService mAvatarService = new AvatarService(this);
    private MessageArchiveService mMessageArchiveService = new MessageArchiveService(this);
    private PushManagementService mPushManagementService = new PushManagementService(this);
    private OnConversationUpdate mOnConversationUpdate = null;


    private final ConversationsFileObserver fileObserver = new ConversationsFileObserver(
            Environment.getExternalStorageDirectory().getAbsolutePath()
    ) {
        @Override
        public void onEvent(int event, String path) {
            markFileDeleted(path);
        }
    };
    private final OnJinglePacketReceived jingleListener = new OnJinglePacketReceived() {

        @Override
        public void onJinglePacketReceived(Account account, JinglePacket packet) {
            mJingleConnectionManager.deliverPacket(account, packet);
        }
    };
    private final OnMessageAcknowledged mOnMessageAcknowledgedListener = new OnMessageAcknowledged() {

        @Override
        public void onMessageAcknowledged(Account account, String uuid) {
            for (final Conversation conversation : getConversations()) {
                if (conversation.getAccount() == account) {
                    Message message = conversation.findUnsentMessageWithUuid(uuid);
                    if (message != null) {
                        markMessage(message, Message.STATUS_SEND);
                    }
                }
            }
        }
    };
    private int convChangedListenerCount = 0;
    private OnShowErrorToast mOnShowErrorToast = null;
    private int showErrorToastListenerCount = 0;
    private int unreadCount = -1;
    private OnAccountUpdate mOnAccountUpdate = null;
    private OnCaptchaRequested mOnCaptchaRequested = null;
    private int accountChangedListenerCount = 0;
    private int captchaRequestedListenerCount = 0;
    private OnRosterUpdate mOnRosterUpdate = null;
    private OnUpdateBlocklist mOnUpdateBlocklist = null;
    private int updateBlocklistListenerCount = 0;
    private int rosterChangedListenerCount = 0;
    private OnMucRosterUpdate mOnMucRosterUpdate = null;
    private int mucRosterChangedListenerCount = 0;
    private OnKeyStatusUpdated mOnKeyStatusUpdated = null;
    private final OnBindListener mOnBindListener = new OnBindListener() {

        @Override
        public void onBind(final Account account) {
            synchronized (mInProgressAvatarFetches) {
                for (Iterator<String> iterator = mInProgressAvatarFetches.iterator(); iterator.hasNext(); ) {
                    final String KEY = iterator.next();
                    if (KEY.startsWith(account.getJid().toBareJid() + "_")) {
                        iterator.remove();
                    }
                }
            }
            if (account.setOption(Account.OPTION_LOGGED_IN_SUCCESSFULLY, true)) {
                databaseBackend.updateAccount(account);
            }
            account.getRoster().clearPresences();
            mJingleConnectionManager.cancelInTransmission();
            fetchRosterFromServer(account);
            fetchBookmarks(account);
            sendPresence(account);
            if (mPushManagementService.available(account)) {
                mPushManagementService.registerPushTokenOnServer(account);
            }
            connectMultiModeConversations(account);
            syncDirtyContacts(account);
        }
    };
    private int keyStatusUpdatedListenerCount = 0;
    private AtomicLong mLastExpiryRun = new AtomicLong(0);
    private SecureRandom mRandom;
    private LruCache<Pair<String, String>, ServiceDiscoveryResult> discoCache = new LruCache<>(20);
    private OnStatusChanged statusListener = new OnStatusChanged() {

        @Override
        public void onStatusChanged(final Account account) {
            XmppConnection connection = account.getXmppConnection();
            if (mOnAccountUpdate != null) {
                mOnAccountUpdate.onAccountUpdate();
            }
            if (account.getStatus() == Account.State.ONLINE) {
                synchronized (mLowPingTimeoutMode) {
                    if (mLowPingTimeoutMode.remove(account.getJid().toBareJid())) {
                        Log.d(Config.LOGTAG, account.getJid().toBareJid() + ": leaving low ping timeout mode");
                    }
                }
                if (account.setShowErrorNotification(true)) {
                    databaseBackend.updateAccount(account);
                }
                mMessageArchiveService.executePendingQueries(account);
                if (connection != null && connection.getFeatures().csi()) {
                    if (checkListeners()) {
                        Log.d(Config.LOGTAG, account.getJid().toBareJid() + " sending csi//inactive");
                        connection.sendInactive();
                    } else {
                        Log.d(Config.LOGTAG, account.getJid().toBareJid() + " sending csi//active");
                        connection.sendActive();
                    }
                }
                List<Conversation> conversations = getConversations();
                for (Conversation conversation : conversations) {
                    if (conversation.getAccount() == account
                            && !account.pendingConferenceJoins.contains(conversation)) {
                        if (!conversation.startOtrIfNeeded()) {
                            Log.d(Config.LOGTAG, account.getJid().toBareJid() + ": couldn't start OTR with " + conversation.getContact().getJid() + " when needed");
                        }
                        checkDeletedFiles(conversation);
                        sendUnsentMessages(conversation);
                        resendFailedFileMessages(conversation);
                    }
                }
                for (Conversation conversation : account.pendingConferenceLeaves) {
                    leaveMuc(conversation);
                }
                account.pendingConferenceLeaves.clear();
                for (Conversation conversation : account.pendingConferenceJoins) {
                    joinMuc(conversation);
                }
                account.pendingConferenceJoins.clear();
                scheduleWakeUpCall(Config.PING_MAX_INTERVAL, account.getUuid().hashCode());
            } else if (account.getStatus() == Account.State.OFFLINE || account.getStatus() == Account.State.DISABLED) {
                resetSendingToWaiting(account);
                if (account.isEnabled() && isInLowPingTimeoutMode(account)) {
                    Log.d(Config.LOGTAG, account.getJid().toBareJid() + ": went into offline state during low ping mode. reconnecting now");
                    reconnectAccount(account, true, false);
                } else {
                    int timeToReconnect = mRandom.nextInt(10) + 2;
                    scheduleWakeUpCall(timeToReconnect, account.getUuid().hashCode());
                }
            } else if (account.getStatus() == Account.State.REGISTRATION_SUCCESSFUL) {
                databaseBackend.updateAccount(account);
                reconnectAccount(account, true, false);
            } else if (account.getStatus() != Account.State.CONNECTING && account.getStatus() != Account.State.NO_INTERNET) {
                resetSendingToWaiting(account);
                if (connection != null && account.getStatus().isAttemptReconnect()) {
                    final int next = connection.getTimeToNextAttempt();
                    final boolean lowPingTimeoutMode = isInLowPingTimeoutMode(account);
                    if (next <= 0) {
                        Log.d(Config.LOGTAG, account.getJid().toBareJid() + ": error connecting account. reconnecting now. lowPingTimeout=" + Boolean.toString(lowPingTimeoutMode));
                        reconnectAccount(account, true, false);
                    } else {
                        final int attempt = connection.getAttempt() + 1;
                        Log.d(Config.LOGTAG, account.getJid().toBareJid() + ": error connecting account. try again in " + next + "s for the " + attempt + " time. lowPingTimeout=" + Boolean.toString(lowPingTimeoutMode));
                        scheduleWakeUpCall(next, account.getUuid().hashCode());
                    }
                }
            }
            getNotificationService().updateErrorNotification();
        }
    };

    private boolean isInLowPingTimeoutMode(Account account) {
        synchronized (mLowPingTimeoutMode) {
            return mLowPingTimeoutMode.contains(account.getJid().toBareJid());
        }
    }

    public void startForcingForegroundNotification() {
        mForceForegroundService.set(true);
        toggleForegroundService();
    }

    public void stopForcingForegroundNotification() {
        mForceForegroundService.set(false);
        toggleForegroundService();
    }

    private OpenPgpServiceConnection pgpServiceConnection;
    private PgpEngine mPgpEngine = null;
    private PowerManager pm;
    private LruCache<String, Bitmap> mBitmapCache;
    private EventReceiver mEventReceiver = new EventReceiver();

    private boolean mRestoredFromDatabase = false;

    private static String generateFetchKey(Account account, final Avatar avatar) {
        return account.getJid().toBareJid() + "_" + avatar.owner + "_" + avatar.sha1sum;
    }

    public boolean areMessagesInitialized() {
        return this.mRestoredFromDatabase;
    }

    public PgpEngine getPgpEngine() {
        if (!Config.supportOpenPgp()) {
            return null;
        } else if (pgpServiceConnection != null && pgpServiceConnection.isBound()) {
            if (this.mPgpEngine == null) {
                this.mPgpEngine = new PgpEngine(new OpenPgpApi(
                        getApplicationContext(),
                        pgpServiceConnection.getService()), this);
            }
            return mPgpEngine;
        } else {
            return null;
        }

    }

    public OpenPgpApi getOpenPgpApi() {
        if (!Config.supportOpenPgp()) {
            return null;
        } else if (pgpServiceConnection != null && pgpServiceConnection.isBound()) {
            return new OpenPgpApi(this, pgpServiceConnection.getService());
        } else {
            return null;
        }
    }

    public FileBackend getFileBackend() {
        return this.fileBackend;
    }

    public AvatarService getAvatarService() {
        return this.mAvatarService;
    }

    public void attachLocationToConversation(final Conversation conversation,
                                             final Uri uri,
                                             final UiCallback<Message> callback) {
        int encryption = conversation.getNextEncryption();
        if (encryption == Message.ENCRYPTION_PGP) {
            encryption = Message.ENCRYPTION_DECRYPTED;
        }
        Message message = new Message(conversation, uri.toString(), encryption);
        if (conversation.getNextCounterpart() != null) {
            message.setCounterpart(conversation.getNextCounterpart());
        }
        if (encryption == Message.ENCRYPTION_DECRYPTED) {
            getPgpEngine().encrypt(message, callback);
        } else {
            callback.success(message);
        }
    }

    public void attachFileToConversation(final Conversation conversation,
                                         final Uri uri,
                                         final UiCallback<Message> callback) {
        if (FileBackend.weOwnFile(this, uri)) {
            Log.d(Config.LOGTAG, "trying to attach file that belonged to us");
            callback.error(R.string.security_error_invalid_file_access, null);
            return;
        }
        final Message message;
        if (conversation.getNextEncryption() == Message.ENCRYPTION_PGP) {
            message = new Message(conversation, "", Message.ENCRYPTION_DECRYPTED);
        } else {
            message = new Message(conversation, "", conversation.getNextEncryption());
        }
        message.setCounterpart(conversation.getNextCounterpart());
        message.setType(Message.TYPE_FILE);
        final AttachFileToConversationRunnable runnable = new AttachFileToConversationRunnable(this, uri, message, callback);
        if (runnable.isVideoMessage()) {
            mVideoCompressionExecutor.execute(runnable);
        } else {
            mFileAddingExecutor.execute(runnable);
        }
    }

    public void attachImageToConversation(final Conversation conversation, final Uri uri, final UiCallback<Message> callback) {
        if (FileBackend.weOwnFile(this, uri)) {
            Log.d(Config.LOGTAG, "trying to attach file that belonged to us");
            callback.error(R.string.security_error_invalid_file_access, null);
            return;
        }
        final String mimeType = MimeUtils.guessMimeTypeFromUri(this, uri);
        final String compressPictures = getCompressPicturesPreference();
        if ("never".equals(compressPictures)
                || ("auto".equals(compressPictures) && getFileBackend().useImageAsIs(uri))
                || (mimeType != null && mimeType.endsWith("/gif"))) {
            Log.d(Config.LOGTAG, conversation.getAccount().getJid().toBareJid() + ": not compressing picture. sending as file");
            attachFileToConversation(conversation, uri, callback);
            return;
        }
        final Message message;
        if (conversation.getNextEncryption() == Message.ENCRYPTION_PGP) {
            message = new Message(conversation, "", Message.ENCRYPTION_DECRYPTED);
        } else {
            message = new Message(conversation, "", conversation.getNextEncryption());
        }
        message.setCounterpart(conversation.getNextCounterpart());
        message.setType(Message.TYPE_IMAGE);
        mFileAddingExecutor.execute(new Runnable() {

            @Override
            public void run() {
                try {
                    getFileBackend().copyImageToPrivateStorage(message, uri);
                    if (conversation.getNextEncryption() == Message.ENCRYPTION_PGP) {
                        final PgpEngine pgpEngine = getPgpEngine();
                        if (pgpEngine != null) {
                            pgpEngine.encrypt(message, callback);
                        } else if (callback != null) {
                            callback.error(R.string.unable_to_connect_to_keychain, null);
                        }
                    } else {
                        callback.success(message);
                    }
                } catch (final FileBackend.FileCopyException e) {
                    callback.error(e.getResId(), message);
                }
            }
        });
    }

    public Conversation find(Bookmark bookmark) {
        return find(bookmark.getAccount(), bookmark.getJid());
    }

    public Conversation find(final Account account, final Jid jid) {
        return find(getConversations(), account, jid);
    }

    @Override
    public int onStartCommand(Intent intent, int flags, int startId) {
        final String action = intent == null ? null : intent.getAction();
        String pushedAccountHash = null;
        boolean interactive = false;
        if (action != null) {
            final String uuid = intent.getStringExtra("uuid");
            final Conversation c = findConversationByUuid(uuid);
            switch (action) {
                case ConnectivityManager.CONNECTIVITY_ACTION:
                    if (hasInternetConnection() && Config.RESET_ATTEMPT_COUNT_ON_NETWORK_CHANGE) {
                        resetAllAttemptCounts(true, false);
                    }
                    break;
                case ACTION_MERGE_PHONE_CONTACTS:
                    if (mRestoredFromDatabase) {
                        loadPhoneContacts();
                    }
                    return START_STICKY;
                case Intent.ACTION_SHUTDOWN:
                    logoutAndSave(true);
                    return START_NOT_STICKY;
                case ACTION_CLEAR_NOTIFICATION:
                    if (c != null) {
                        mNotificationService.clear(c);
                    } else {
                        mNotificationService.clear();
                    }
                    break;
                case ACTION_DISMISS_ERROR_NOTIFICATIONS:
                    dismissErrorNotifications();
                    break;
                case ACTION_TRY_AGAIN:
                    resetAllAttemptCounts(false, true);
                    interactive = true;
                    break;
                case ACTION_REPLY_TO_CONVERSATION:
                    Bundle remoteInput = RemoteInput.getResultsFromIntent(intent);
                    if (remoteInput != null && c != null) {
                        final CharSequence body = remoteInput.getCharSequence("text_reply");
                        if (body != null && body.length() > 0) {
                            directReply(c, body.toString(), intent.getBooleanExtra("dismiss_notification", false));
                        }
                    }
                    break;
                case ACTION_MARK_AS_READ:
                    if (c != null) {
                        sendReadMarker(c);
                    } else {
                        Log.d(Config.LOGTAG, "received mark read intent for unknown conversation (" + uuid + ")");
                    }
                    break;
                case AudioManager.RINGER_MODE_CHANGED_ACTION:
                    if (dndOnSilentMode()) {
                        refreshAllPresences();
                    }
                    break;
                case Intent.ACTION_SCREEN_ON:
                    deactivateGracePeriod();
                case Intent.ACTION_SCREEN_OFF:
                    if (awayWhenScreenOff()) {
                        refreshAllPresences();
                    }
                    break;
                case ACTION_GCM_TOKEN_REFRESH:
                    refreshAllGcmTokens();
                    break;
                case ACTION_IDLE_PING:
                    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
                        scheduleNextIdlePing();
                    }
                    break;
                case ACTION_GCM_MESSAGE_RECEIVED:
                    Log.d(Config.LOGTAG, "gcm push message arrived in service. extras=" + intent.getExtras());
                    pushedAccountHash = intent.getStringExtra("account");
                    break;
            }
        }
        synchronized (this) {
            this.wakeLock.acquire();
            boolean pingNow = ConnectivityManager.CONNECTIVITY_ACTION.equals(action);
            HashSet<Account> pingCandidates = new HashSet<>();
            for (Account account : accounts) {
                pingNow |= processAccountState(account,
                        interactive,
                        "ui".equals(action),
                        CryptoHelper.getAccountFingerprint(account).equals(pushedAccountHash),
                        pingCandidates);
            }
            if (pingNow) {
                for (Account account : pingCandidates) {
                    List<Conversation> conversations = getConversations();
                    for (Conversation conversation : conversations) {
                        if (conversation.getAccount() == account && !account.pendingConferenceJoins.contains(conversation)) {
                            resendFailedFileMessages(conversation);
                        }
                    }
                    final boolean lowTimeout = isInLowPingTimeoutMode(account);
                    account.getXmppConnection().sendPing();
                    Log.d(Config.LOGTAG, account.getJid().toBareJid() + " send ping (action=" + action + ", lowTimeout=" + Boolean.toString(lowTimeout) + ")");
                    scheduleWakeUpCall(lowTimeout ? Config.LOW_PING_TIMEOUT : Config.PING_TIMEOUT, account.getUuid().hashCode());
                }
            }
            if (wakeLock.isHeld()) {
                try {
                    wakeLock.release();
                } catch (final RuntimeException ignored) {
                }
            }
        }
        if (SystemClock.elapsedRealtime() - mLastExpiryRun.get() >= Config.EXPIRY_INTERVAL) {
            expireOldMessages();
        }
        return START_STICKY;
    }

    private boolean processAccountState(Account account, boolean interactive, boolean isUiAction, boolean isAccountPushed, HashSet<Account> pingCandidates) {
        boolean pingNow = false;
        if (account.getStatus().isAttemptReconnect()) {
            if (!hasInternetConnection()) {
                account.setStatus(Account.State.NO_INTERNET);
                if (statusListener != null) {
                    statusListener.onStatusChanged(account);
                }
            } else {
                if (account.getStatus() == Account.State.NO_INTERNET) {
                    account.setStatus(Account.State.OFFLINE);
                    if (statusListener != null) {
                        statusListener.onStatusChanged(account);
                    }
                }
                if (account.getStatus() == Account.State.ONLINE) {
                    synchronized (mLowPingTimeoutMode) {
                        long lastReceived = account.getXmppConnection().getLastPacketReceived();
                        long lastSent = account.getXmppConnection().getLastPingSent();
                        long pingInterval = isUiAction ? Config.PING_MIN_INTERVAL * 1000 : Config.PING_MAX_INTERVAL * 1000;
                        long msToNextPing = (Math.max(lastReceived, lastSent) + pingInterval) - SystemClock.elapsedRealtime();
                        int pingTimeout = mLowPingTimeoutMode.contains(account.getJid().toBareJid()) ? Config.LOW_PING_TIMEOUT * 1000 : Config.PING_TIMEOUT * 1000;
                        long pingTimeoutIn = (lastSent + pingTimeout) - SystemClock.elapsedRealtime();
                        if (lastSent > lastReceived) {
                            if (pingTimeoutIn < 0) {
                                Log.d(Config.LOGTAG, account.getJid().toBareJid() + ": ping timeout");
                                this.reconnectAccount(account, true, interactive);
                            } else {
                                int secs = (int) (pingTimeoutIn / 1000);
                                this.scheduleWakeUpCall(secs, account.getUuid().hashCode());
                            }
                        } else {
                            pingCandidates.add(account);
                            if (isAccountPushed) {
                                pingNow = true;
                                if (mLowPingTimeoutMode.add(account.getJid().toBareJid())) {
                                    Log.d(Config.LOGTAG, account.getJid().toBareJid() + ": entering low ping timeout mode");
                                }
                            } else if (msToNextPing <= 0) {
                                pingNow = true;
                            } else {
                                this.scheduleWakeUpCall((int) (msToNextPing / 1000), account.getUuid().hashCode());
                                if (mLowPingTimeoutMode.remove(account.getJid().toBareJid())) {
                                    Log.d(Config.LOGTAG, account.getJid().toBareJid() + ": leaving low ping timeout mode");

                                }
                            }
                        }
                    }
                } else if (account.getStatus() == Account.State.OFFLINE) {
                    reconnectAccount(account, true, interactive);
                } else if (account.getStatus() == Account.State.CONNECTING) {
                    long secondsSinceLastConnect = (SystemClock.elapsedRealtime() - account.getXmppConnection().getLastConnect()) / 1000;
                    long secondsSinceLastDisco = (SystemClock.elapsedRealtime() - account.getXmppConnection().getLastDiscoStarted()) / 1000;
                    long discoTimeout = Config.CONNECT_DISCO_TIMEOUT - secondsSinceLastDisco;
                    long timeout = Config.CONNECT_TIMEOUT - secondsSinceLastConnect;
                    if (timeout < 0) {
                        Log.d(Config.LOGTAG, account.getJid() + ": time out during connect reconnecting (secondsSinceLast=" + secondsSinceLastConnect + ")");
                        account.getXmppConnection().resetAttemptCount(false);
                        reconnectAccount(account, true, interactive);
                    } else if (discoTimeout < 0) {
                        account.getXmppConnection().sendDiscoTimeout();
                        scheduleWakeUpCall((int) Math.min(timeout, discoTimeout), account.getUuid().hashCode());
                    } else {
                        scheduleWakeUpCall((int) Math.min(timeout, discoTimeout), account.getUuid().hashCode());
                    }
                } else {
                    if (account.getXmppConnection().getTimeToNextAttempt() <= 0) {
                        reconnectAccount(account, true, interactive);
                    }
                }
            }
        }
        return pingNow;
    }

    public boolean isDataSaverDisabled() {
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {
            ConnectivityManager connectivityManager = (ConnectivityManager) getSystemService(CONNECTIVITY_SERVICE);
            return !connectivityManager.isActiveNetworkMetered()
                    || connectivityManager.getRestrictBackgroundStatus() == ConnectivityManager.RESTRICT_BACKGROUND_STATUS_DISABLED;
        } else {
            return true;
        }
    }

    private void directReply(Conversation conversation, String body, final boolean dismissAfterReply) {
        Message message = new Message(conversation, body, conversation.getNextEncryption());
        message.markUnread();
        if (message.getEncryption() == Message.ENCRYPTION_PGP) {
            getPgpEngine().encrypt(message, new UiCallback<Message>() {
                @Override
                public void success(Message message) {
                    message.setEncryption(Message.ENCRYPTION_DECRYPTED);
                    sendMessage(message);
                    if (dismissAfterReply) {
                        markRead(message.getConversation(), true);
                    } else {
                        mNotificationService.pushFromDirectReply(message);
                    }
                }

                @Override
                public void error(int errorCode, Message object) {

                }

                @Override
                public void userInputRequried(PendingIntent pi, Message object) {

                }
            });
        } else {
            sendMessage(message);
            if (dismissAfterReply) {
                markRead(conversation, true);
            } else {
                mNotificationService.pushFromDirectReply(message);
            }
        }
    }

    private boolean dndOnSilentMode() {
        return getBooleanPreference(SettingsActivity.DND_ON_SILENT_MODE, R.bool.dnd_on_silent_mode);
    }

    private boolean manuallyChangePresence() {
        return getBooleanPreference(SettingsActivity.MANUALLY_CHANGE_PRESENCE, R.bool.manually_change_presence);
    }

    private boolean treatVibrateAsSilent() {
        return getBooleanPreference(SettingsActivity.TREAT_VIBRATE_AS_SILENT, R.bool.treat_vibrate_as_silent);
    }

    private boolean awayWhenScreenOff() {
        return getBooleanPreference(SettingsActivity.AWAY_WHEN_SCREEN_IS_OFF, R.bool.away_when_screen_off);
    }

    private String getCompressPicturesPreference() {
        return getPreferences().getString("picture_compression", getResources().getString(R.string.picture_compression));
    }

    public int getCompressImageResolutionPreference() {
        switch (getPreferences().getString("image_compression", getResources().getString(R.string.picture_compression))) {
            case "low":
                return 720;
            case "mid":
                return 1920;
            case "high":
                return 3840;
            default:
                return 3840;
        }
    }

    public int getCompressImageSizePreference() {
        switch (getPreferences().getString("image_compression", getResources().getString(R.string.picture_compression))) {
            case "low":
                return 209715; // 0.2 * 1024 * 1024 = 209715 (0.2 MiB)
            case "mid":
                return 524288; // 0.5 * 1024 * 1024 = 524288 (0.5 MiB)
            case "high":
                return 1048576; // 1 * 1024 * 1024 = 1048576 (1 MiB)
            default:
                return 524288;
        }
    }

    public int getCompressVideoResolutionPreference() {
        switch (getPreferences().getString("video_compression", getResources().getString(R.string.video_compression))) {
            case "low":
                return 144;
            case "mid":
                return 360;
            case "high":
                return 720;
            default:
                return 360;
        }
    }

    public int getCompressVideoBitratePreference() {
        switch (getPreferences().getString("video_compression", getResources().getString(R.string.video_compression))) {
            case "low":
                return 100000;
            case "mid":
                return 500000;
            case "high":
                return 2000000;
            default:
                return 500000;
        }
    }

    private Presence.Status getTargetPresence() {
        if (dndOnSilentMode() && isPhoneSilenced()) {
            return Presence.Status.DND;
        } else if (awayWhenScreenOff() && !isInteractive()) {
            return Presence.Status.AWAY;
        } else {
            return Presence.Status.ONLINE;
        }
    }

    @SuppressLint("NewApi")
    @SuppressWarnings("deprecation")
    public boolean isInteractive() {
        final PowerManager pm = (PowerManager) getSystemService(Context.POWER_SERVICE);

        final boolean isScreenOn;
        if (Build.VERSION.SDK_INT < Build.VERSION_CODES.LOLLIPOP) {
            isScreenOn = pm.isScreenOn();
        } else {
            isScreenOn = pm.isInteractive();
        }
        return isScreenOn;
    }

    private boolean isPhoneSilenced() {
        AudioManager audioManager = (AudioManager) getSystemService(Context.AUDIO_SERVICE);
        try {
            if (treatVibrateAsSilent()) {
                return audioManager.getRingerMode() != AudioManager.RINGER_MODE_NORMAL;
            } else {
                return audioManager.getRingerMode() == AudioManager.RINGER_MODE_SILENT;
            }
        } catch (Throwable throwable) {
            Log.d(Config.LOGTAG, "platform bug in isPhoneSilenced (" + throwable.getMessage() + ")");
            return false;
        }
    }

    private void resetAllAttemptCounts(boolean reallyAll, boolean retryImmediately) {
        Log.d(Config.LOGTAG, "resetting all attempt counts");
        for (Account account : accounts) {
            if (account.hasErrorStatus() || reallyAll) {
                final XmppConnection connection = account.getXmppConnection();
                if (connection != null) {
                    connection.resetAttemptCount(retryImmediately);
                }
            }
            if (account.setShowErrorNotification(true)) {
                databaseBackend.updateAccount(account);
            }
        }
        mNotificationService.updateErrorNotification();
    }

    private void dismissErrorNotifications() {
        for (final Account account : this.accounts) {
            if (account.hasErrorStatus()) {
                Log.d(Config.LOGTAG, account.getJid().toBareJid() + ": dismissing error notification");
                if (account.setShowErrorNotification(false)) {
                    databaseBackend.updateAccount(account);
                }
            }
        }
    }

    private void expireOldMessages() {
        expireOldMessages(false);
    }

    public void expireOldMessages(final boolean resetHasMessagesLeftOnServer) {
        mLastExpiryRun.set(SystemClock.elapsedRealtime());
        mDatabaseWriterExecutor.execute(new Runnable() {
            @Override
            public void run() {
                long timestamp = getAutomaticMessageDeletionDate();
                if (timestamp > 0) {
                    databaseBackend.expireOldMessages(timestamp);
                    synchronized (XmppConnectionService.this.conversations) {
                        for (Conversation conversation : XmppConnectionService.this.conversations) {
                            conversation.expireOldMessages(timestamp);
                            if (resetHasMessagesLeftOnServer) {
                                conversation.messagesLoaded.set(true);
                                conversation.setHasMessagesLeftOnServer(true);
                            }
                        }
                    }
                    updateConversationUi();
                }
            }
        });
    }

    public boolean hasInternetConnection() {
        final ConnectivityManager cm = (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE);
        try {
            final NetworkInfo activeNetwork = cm.getActiveNetworkInfo();
            return activeNetwork != null && activeNetwork.isConnected();
        } catch (RuntimeException e) {
            Log.d(Config.LOGTAG, "unable to check for internet connection", e);
            return true; //if internet connection can not be checked it is probably best to just try
        }
    }

    public boolean isWIFI() {
        final ConnectivityManager cm = (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE);
        try {
            final NetworkInfo activeNetwork = cm.getActiveNetworkInfo();
            if (activeNetwork != null) { // connected to the internet
                if (activeNetwork.getType() == ConnectivityManager.TYPE_WIFI) {
                    return true;
                }
            }
        } catch (RuntimeException e) {
            Log.d(Config.LOGTAG, "unable to check for WIFI connection", e);
            return false;
        }
        return false;
    }

    public boolean isMobile() {
        final ConnectivityManager cm = (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE);
        try {
            final NetworkInfo activeNetwork = cm.getActiveNetworkInfo();
            if (activeNetwork != null) { // connected to the internet
                if (activeNetwork.getType() == ConnectivityManager.TYPE_MOBILE) {
                    if (!activeNetwork.isRoaming()) {
                        return true;
                    }
                }
            }
        } catch (RuntimeException e) {
            Log.d(Config.LOGTAG, "unable to check for mobile connection", e);
            return false;
        }
        return false;
    }

    public boolean isMobileRoaming() {
        final ConnectivityManager cm = (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE);
        try {
            final NetworkInfo activeNetwork = cm.getActiveNetworkInfo();
            if (activeNetwork != null) { // connected to the internet
                if (activeNetwork.getType() == ConnectivityManager.TYPE_MOBILE) {
                    if (activeNetwork.isRoaming()) {
                        return true;
                    }
                }
            }
        } catch (RuntimeException e) {
            Log.d(Config.LOGTAG, "unable to check for roaming connection", e);
            return false;
        }
        return false;
    }

    @SuppressLint("TrulyRandom")
    @Override
    public void onCreate() {
        ExceptionHelper.init(getApplicationContext());
        PRNGFixes.apply();
        Resolver.init(this);
        this.mRandom = new SecureRandom();
        updateMemorizingTrustmanager();
        final int maxMemory = (int) (Runtime.getRuntime().maxMemory() / 1024);
        final int cacheSize = maxMemory / 8;
        this.mBitmapCache = new LruCache<String, Bitmap>(cacheSize) {
            @Override
            protected int sizeOf(final String key, final Bitmap bitmap) {
                return bitmap.getByteCount() / 1024;
            }
        };

        Log.d(Config.LOGTAG, "initializing database...");
        this.databaseBackend = DatabaseBackend.getInstance(getApplicationContext());
        Log.d(Config.LOGTAG, "restoring accounts...");
        this.accounts = databaseBackend.getAccounts();

        if (databaseBackend.startTimeCountExceedsThreshold()) {
            Log.d(Config.LOGTAG, "number of restarts exceeds threshold.");
        }

        final SharedPreferences.Editor editor = getPreferences().edit();
        if (this.accounts.size() == 0 && Arrays.asList("Sony", "Sony Ericsson").contains(Build.MANUFACTURER)) {
            editor.putBoolean(SettingsActivity.SHOW_FOREGROUND_SERVICE, true);
            Log.d(Config.LOGTAG, Build.MANUFACTURER + " is on blacklist. enabling foreground service");
        }
        editor.putBoolean(EventReceiver.SETTING_ENABLED_ACCOUNTS, hasEnabledAccounts()).apply();
        editor.apply();
        restoreFromDatabase();

        getContentResolver().registerContentObserver(ContactsContract.Contacts.CONTENT_URI, true, contactObserver);
        new Thread(new Runnable() {
            @Override
            public void run() {
                fileObserver.startWatching();
            }
        }).start();
        if (Config.supportOpenPgp()) {
            this.pgpServiceConnection = new OpenPgpServiceConnection(this, "org.sufficientlysecure.keychain", new OpenPgpServiceConnection.OnBound() {
                @Override
                public void onBound(IOpenPgpService2 service) {
                    for (Account account : accounts) {
                        final PgpDecryptionService pgp = account.getPgpDecryptionService();
                        if (pgp != null) {
                            pgp.continueDecryption(true);
                        }
                    }
                }

                @Override
                public void onError(Exception e) {
                }
            });
            this.pgpServiceConnection.bindToService();
        }

        this.pm = (PowerManager) getSystemService(Context.POWER_SERVICE);
        this.wakeLock = pm.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK, "XmppConnectionService");
        toggleForegroundService();
        updateUnreadCountBadge();
        toggleScreenEventReceiver();
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
            scheduleNextIdlePing();
        }
        //start export log service every day at given time
        ScheduleAutomaticExport();
        // cancel scheduled exporter
        CancelAutomaticExport(false);
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {
            registerReceiver(this.mEventReceiver, new IntentFilter(ConnectivityManager.CONNECTIVITY_ACTION));
        }
    }

    @Override
    public void onTrimMemory(int level) {
        super.onTrimMemory(level);
        if (level >= TRIM_MEMORY_COMPLETE) {
            Log.d(Config.LOGTAG, "clear cache due to low memory");
            getBitmapCache().evictAll();
        }
    }

    @Override
    public void onDestroy() {
        try {
            unregisterReceiver(this.mEventReceiver);
        } catch (IllegalArgumentException e) {
            //ignored
        }
        fileObserver.stopWatching();
        super.onDestroy();
        // cancel scheduled exporter
        CancelAutomaticExport(true);
    }

    public void toggleScreenEventReceiver() {
        if (awayWhenScreenOff() && !manuallyChangePresence()) {
            final IntentFilter filter = new IntentFilter(Intent.ACTION_SCREEN_ON);
            filter.addAction(Intent.ACTION_SCREEN_OFF);
            registerReceiver(this.mEventReceiver, filter);
        } else {
            try {
                unregisterReceiver(this.mEventReceiver);
            } catch (IllegalArgumentException e) {
                //ignored
            }
        }
    }

    public void toggleForegroundService() {
        if (mForceForegroundService.get() || (showForegroundService())) {
            startForeground(NotificationService.FOREGROUND_NOTIFICATION_ID, this.mNotificationService.createForegroundNotification());
            Log.d(Config.LOGTAG, "started foreground service");
        } else {
            stopForeground(true);
            Log.d(Config.LOGTAG, "stopped foreground service");
        }
    }

    @Override
    public void onTaskRemoved(final Intent rootIntent) {
        super.onTaskRemoved(rootIntent);
        if (showForegroundService() || mForceForegroundService.get()) {
            Log.d(Config.LOGTAG, "ignoring onTaskRemoved because foreground service is activated");
        } else {
            this.logoutAndSave(false);
        }
    }

    private void logoutAndSave(boolean stop) {
        int activeAccounts = 0;
        databaseBackend.clearStartTimeCounter(true); // regular swipes don't count towards restart counter
        for (final Account account : accounts) {
            if (account.getStatus() != Account.State.DISABLED) {
                activeAccounts++;
            }
            databaseBackend.writeRoster(account.getRoster());
            if (account.getXmppConnection() != null) {
                new Thread(new Runnable() {
                    @Override
                    public void run() {
                        disconnect(account, false);
                    }
                }).start();
            }
        }
        if (stop || activeAccounts == 0) {
            Log.d(Config.LOGTAG, "good bye");
            stopSelf();
        }
    }

    public void scheduleWakeUpCall(int seconds, int requestCode) {
        final long timeToWake = SystemClock.elapsedRealtime() + (seconds < 0 ? 1 : seconds + 1) * 1000;
        final AlarmManager alarmManager = (AlarmManager) getSystemService(Context.ALARM_SERVICE);
        Intent intent = new Intent(this, EventReceiver.class);
        intent.setAction("ping");
        PendingIntent pendingIntent = PendingIntent.getBroadcast(this, requestCode, intent, 0);
        try {
            alarmManager.set(AlarmManager.ELAPSED_REALTIME_WAKEUP, timeToWake, pendingIntent);
        } catch (RuntimeException e) {
            Log.e(Config.LOGTAG, "unable to schedule alarm for ping", e);
        }
    }

    @TargetApi(Build.VERSION_CODES.M)
    private void scheduleNextIdlePing() {
        final long timeToWake = SystemClock.elapsedRealtime() + (Config.IDLE_PING_INTERVAL * 1000);
        final AlarmManager alarmManager = (AlarmManager) getSystemService(Context.ALARM_SERVICE);
        Intent intent = new Intent(this, EventReceiver.class);
        intent.setAction(ACTION_IDLE_PING);
        PendingIntent pendingIntent = PendingIntent.getBroadcast(this, 0, intent, 0);
        try {
            alarmManager.setAndAllowWhileIdle(AlarmManager.ELAPSED_REALTIME_WAKEUP, timeToWake, pendingIntent);
        } catch (RuntimeException e) {
            Log.d(Config.LOGTAG, "unable to schedule alarm for idle ping", e);
        }
    }

    public XmppConnection createConnection(final Account account) {
        final SharedPreferences sharedPref = getPreferences();
        String resource;
        try {
            resource = sharedPref.getString("resource", getString(R.string.default_resource)).toLowerCase(Locale.ENGLISH);
            if (resource.trim().isEmpty()) {
                throw new Exception();
            }
        } catch (Exception e) {
            resource = "Pix-Art Messenger";
        }
        account.setResource(resource);
        final XmppConnection connection = new XmppConnection(account, this);
        connection.setOnMessagePacketReceivedListener(this.mMessageParser);
        connection.setOnStatusChangedListener(this.statusListener);
        connection.setOnPresencePacketReceivedListener(this.mPresenceParser);
        connection.setOnUnregisteredIqPacketReceivedListener(this.mIqParser);
        connection.setOnJinglePacketReceivedListener(this.jingleListener);
        connection.setOnBindListener(this.mOnBindListener);
        connection.setOnMessageAcknowledgeListener(this.mOnMessageAcknowledgedListener);
        connection.addOnAdvancedStreamFeaturesAvailableListener(this.mMessageArchiveService);
        connection.addOnAdvancedStreamFeaturesAvailableListener(this.mAvatarService);
        AxolotlService axolotlService = account.getAxolotlService();
        if (axolotlService != null) {
            connection.addOnAdvancedStreamFeaturesAvailableListener(axolotlService);
        }
        return connection;
    }

    public void sendChatState(Conversation conversation) {
        if (sendChatStates()) {
            MessagePacket packet = mMessageGenerator.generateChatState(conversation);
            sendMessagePacket(conversation.getAccount(), packet);
        }
    }

    private void sendFileMessage(final Message message, final boolean delay) {
        Log.d(Config.LOGTAG, "send file message");
        final Account account = message.getConversation().getAccount();
        if (account.httpUploadAvailable(fileBackend.getFile(message, false).getSize())
                || message.getConversation().getMode() == Conversation.MODE_MULTI) {
            mHttpConnectionManager.createNewUploadConnection(message, delay);
        } else {
            mJingleConnectionManager.createNewConnection(message);
        }
    }

    public void sendMessage(final Message message) {
        sendMessage(message, false, false);
    }

    private void sendMessage(final Message message, final boolean resend, final boolean delay) {
        final Account account = message.getConversation().getAccount();
        if (account.setShowErrorNotification(true)) {
            databaseBackend.updateAccount(account);
            mNotificationService.updateErrorNotification();
        }
        final Conversation conversation = message.getConversation();
        account.deactivateGracePeriod();
        MessagePacket packet = null;
        final boolean addToConversation = (conversation.getMode() != Conversation.MODE_MULTI
                || !Patches.BAD_MUC_REFLECTION.contains(account.getServerIdentity()))
                && !message.edited();
        boolean saveInDb = addToConversation;
        message.setStatus(Message.STATUS_WAITING);

        if (!resend && message.getEncryption() != Message.ENCRYPTION_OTR) {
            message.getConversation().endOtrIfNeeded();
            message.getConversation().findUnsentMessagesWithEncryption(Message.ENCRYPTION_OTR,
                    new Conversation.OnMessageFound() {
                        @Override
                        public void onMessageFound(Message message) {
                            markMessage(message, Message.STATUS_SEND_FAILED);
                        }
                    });
        }

        if (account.isOnlineAndConnected()) {
            switch (message.getEncryption()) {
                case Message.ENCRYPTION_NONE:
                    if (message.needsUploading()) {
                        if (account.httpUploadAvailable(fileBackend.getFile(message, false).getSize())
                                || conversation.getMode() == Conversation.MODE_MULTI
                                || message.fixCounterpart()) {
                            this.sendFileMessage(message, delay);
                        } else {
                            break;
                        }
                    } else {
                        packet = mMessageGenerator.generateChat(message);
                    }
                    break;
                case Message.ENCRYPTION_PGP:
                case Message.ENCRYPTION_DECRYPTED:
                    if (message.needsUploading()) {
                        if (account.httpUploadAvailable(fileBackend.getFile(message, false).getSize())
                                || conversation.getMode() == Conversation.MODE_MULTI
                                || message.fixCounterpart()) {
                            this.sendFileMessage(message, delay);
                        } else {
                            break;
                        }
                    } else {
                        packet = mMessageGenerator.generatePgpChat(message);
                    }
                    break;
                case Message.ENCRYPTION_OTR:
                    SessionImpl otrSession = conversation.getOtrSession();
                    if (otrSession != null && otrSession.getSessionStatus() == SessionStatus.ENCRYPTED) {
                        try {
                            message.setCounterpart(Jid.fromSessionID(otrSession.getSessionID()));
                        } catch (InvalidJidException e) {
                            break;
                        }
                        if (message.needsUploading()) {
                            mJingleConnectionManager.createNewConnection(message);
                        } else {
                            packet = mMessageGenerator.generateOtrChat(message);
                        }
                    } else if (otrSession == null) {
                        if (message.fixCounterpart()) {
                            conversation.startOtrSession(message.getCounterpart().getResourcepart(), true);
                        } else {
                            Log.d(Config.LOGTAG, account.getJid().toBareJid() + ": could not fix counterpart for OTR message to contact " + message.getCounterpart());
                            break;
                        }
                    } else {
                        Log.d(Config.LOGTAG, account.getJid().toBareJid() + " OTR session with " + message.getContact() + " is in wrong state: " + otrSession.getSessionStatus().toString());
                    }
                    break;
                case Message.ENCRYPTION_AXOLOTL:
                    message.setFingerprint(account.getAxolotlService().getOwnFingerprint());
                    if (message.needsUploading()) {
                        if (account.httpUploadAvailable(fileBackend.getFile(message, false).getSize())
                                || conversation.getMode() == Conversation.MODE_MULTI
                                || message.fixCounterpart()) {
                            this.sendFileMessage(message, delay);
                        } else {
                            break;
                        }
                    } else {
                        XmppAxolotlMessage axolotlMessage = account.getAxolotlService().fetchAxolotlMessageFromCache(message);
                        if (axolotlMessage == null) {
                            account.getAxolotlService().preparePayloadMessage(message, delay);
                        } else {
                            packet = mMessageGenerator.generateAxolotlChat(message, axolotlMessage);
                        }
                    }
                    break;

            }
            if (packet != null) {
                if (account.getXmppConnection().getFeatures().sm() || (conversation.getMode() == Conversation.MODE_MULTI && message.getCounterpart().isBareJid())) {
                    message.setStatus(Message.STATUS_UNSEND);
                } else {
                    message.setStatus(Message.STATUS_SEND);
                }
            }
        } else {
            switch (message.getEncryption()) {
                case Message.ENCRYPTION_DECRYPTED:
                    if (!message.needsUploading()) {
                        String pgpBody = message.getEncryptedBody();
                        String decryptedBody = message.getBody();
                        message.setBody(pgpBody);
                        message.setEncryption(Message.ENCRYPTION_PGP);
                        if (message.edited()) {
                            message.setBody(decryptedBody);
                            message.setEncryption(Message.ENCRYPTION_DECRYPTED);
                            databaseBackend.updateMessage(message, message.getEditedId());
                            updateConversationUi();
                            return;
                        } else {
                            databaseBackend.createMessage(message);
                            saveInDb = false;
                            message.setBody(decryptedBody);
                            message.setEncryption(Message.ENCRYPTION_DECRYPTED);
                        }
                    }
                    break;
                case Message.ENCRYPTION_OTR:
                    if (!conversation.hasValidOtrSession() && message.getCounterpart() != null) {
                        Log.d(Config.LOGTAG, account.getJid().toBareJid() + ": create otr session without starting for " + message.getContact().getJid());
                        conversation.startOtrSession(message.getCounterpart().getResourcepart(), false);
                    }
                    break;
                case Message.ENCRYPTION_AXOLOTL:
                    message.setFingerprint(account.getAxolotlService().getOwnFingerprint());
                    break;
            }
        }

        boolean mucMessage = conversation.getMode() == Conversation.MODE_MULTI && message.getType() != Message.TYPE_PRIVATE;
        if (mucMessage) {
            message.setCounterpart(conversation.getMucOptions().getSelf().getFullJid());
        }

        if (resend) {
            if (packet != null && addToConversation) {
                if (account.getXmppConnection().getFeatures().sm() || mucMessage) {
                    markMessage(message, Message.STATUS_UNSEND);
                } else {
                    markMessage(message, Message.STATUS_SEND);
                }
            }
        } else {
            if (addToConversation) {
                conversation.add(message);
            }
            if (saveInDb) {
                databaseBackend.createMessage(message);
            } else if (message.edited()) {
                databaseBackend.updateMessage(message, message.getEditedId());
            }
            updateConversationUi();
        }
        if (packet != null) {
            if (delay) {
                mMessageGenerator.addDelay(packet, message.getTimeSent());
            }
            if (conversation.setOutgoingChatState(Config.DEFAULT_CHATSTATE)) {
                if (this.sendChatStates()) {
                    packet.addChild(ChatState.toElement(conversation.getOutgoingChatState()));
                }
            }
            sendMessagePacket(account, packet);
        }
    }

    private void sendUnsentMessages(final Conversation conversation) {
        conversation.findWaitingMessages(new Conversation.OnMessageFound() {

            @Override
            public void onMessageFound(Message message) {
                resendMessage(message, true);
            }
        });
    }

    private void resendFailedFileMessages(final Conversation conversation) {
        conversation.findFailedMessagesWithFiles(new Conversation.OnMessageFound() {

            @Override
            public void onMessageFound(Message message) {
                if (mHttpConnectionManager.getAutoAcceptFileSize() >= message.getFileParams().size) {
                    Log.d(Config.LOGTAG, "Resend failed message with size " + message.getFileParams().size  + " bytes for " + conversation.getJid());
                    resendMessage(message, true);
                }
            }
        });
    }

    public void resendMessage(final Message message, final boolean delay) {
        sendMessage(message, true, delay);
    }

    public void fetchRosterFromServer(final Account account) {
        final IqPacket iqPacket = new IqPacket(IqPacket.TYPE.GET);
        if (!"".equals(account.getRosterVersion())) {
            Log.d(Config.LOGTAG, account.getJid().toBareJid()
                    + ": fetching roster version " + account.getRosterVersion());
        } else {
            Log.d(Config.LOGTAG, account.getJid().toBareJid() + ": fetching roster");
        }
        iqPacket.query(Namespace.ROSTER).setAttribute("ver", account.getRosterVersion());
        sendIqPacket(account, iqPacket, mIqParser);
    }

    public void fetchBookmarks(final Account account) {
        final IqPacket iqPacket = new IqPacket(IqPacket.TYPE.GET);
        final Element query = iqPacket.query("jabber:iq:private");
        query.addChild("storage", "storage:bookmarks");
        final OnIqPacketReceived callback = new OnIqPacketReceived() {

            @Override
            public void onIqPacketReceived(final Account account, final IqPacket packet) {
                if (packet.getType() == IqPacket.TYPE.RESULT) {
                    final Element query = packet.query();
                    final HashMap<Jid, Bookmark> bookmarks = new HashMap<>();
                    final Element storage = query.findChild("storage", "storage:bookmarks");
                    final boolean autojoin = respectAutojoin();
                    if (storage != null) {
                        for (final Element item : storage.getChildren()) {
                            if (item.getName().equals("conference")) {
                                final Bookmark bookmark = Bookmark.parse(item, account);
                                Bookmark old = bookmarks.put(bookmark.getJid(), bookmark);
                                if (old != null && old.getBookmarkName() != null && bookmark.getBookmarkName() == null) {
                                    bookmark.setBookmarkName(old.getBookmarkName());
                                }
                                Conversation conversation = find(bookmark);
                                if (conversation != null) {
                                    conversation.setBookmark(bookmark);
                                } else if (bookmark.autojoin() && bookmark.getJid() != null && autojoin) {
                                    conversation = findOrCreateConversation(account, bookmark.getJid(), true, true, false);
                                    conversation.setBookmark(bookmark);
                                }
                            }
                        }
                    }
                    account.setBookmarks(new ArrayList<>(bookmarks.values()));
                } else {
                    Log.d(Config.LOGTAG, account.getJid().toBareJid() + ": could not fetch bookmarks");
                }
            }
        };
        sendIqPacket(account, iqPacket, callback);
    }

    public void pushBookmarks(Account account) {
        Log.d(Config.LOGTAG, account.getJid().toBareJid() + ": pushing bookmarks");
        IqPacket iqPacket = new IqPacket(IqPacket.TYPE.SET);
        Element query = iqPacket.query("jabber:iq:private");
        Element storage = query.addChild("storage", "storage:bookmarks");
        for (Bookmark bookmark : account.getBookmarks()) {
            storage.addChild(bookmark);
        }
        sendIqPacket(account, iqPacket, mDefaultIqHandler);
    }

    private void restoreFromDatabase() {
        synchronized (this.conversations) {
            final Map<String, Account> accountLookupTable = new Hashtable<>();
            for (Account account : this.accounts) {
                accountLookupTable.put(account.getUuid(), account);
            }
            Log.d(Config.LOGTAG, "restoring conversations...");
            final long startTimeConversationsRestore = SystemClock.elapsedRealtime();
            this.conversations.addAll(databaseBackend.getConversations(Conversation.STATUS_AVAILABLE));
            for (Iterator<Conversation> iterator = conversations.listIterator(); iterator.hasNext(); ) {
                Conversation conversation = iterator.next();
                Account account = accountLookupTable.get(conversation.getAccountUuid());
                if (account != null) {
                    conversation.setAccount(account);
                } else {
                    Log.e(Config.LOGTAG, "unable to restore Conversations with " + conversation.getJid());
                    iterator.remove();
                }
            }
            long diffConversationsRestore = SystemClock.elapsedRealtime() - startTimeConversationsRestore;
            Log.d(Config.LOGTAG, "finished restoring conversations in " + diffConversationsRestore + "ms");
            Runnable runnable = new Runnable() {
                @Override
                public void run() {
                    long deletionDate = getAutomaticMessageDeletionDate();
                    mLastExpiryRun.set(SystemClock.elapsedRealtime());
                    if (deletionDate > 0) {
                        Log.d(Config.LOGTAG, "deleting messages that are older than " + AbstractGenerator.getTimestamp(deletionDate));
                        databaseBackend.expireOldMessages(deletionDate);
                    }
                    Log.d(Config.LOGTAG, "restoring roster...");
                    for (Account account : accounts) {
                        databaseBackend.readRoster(account.getRoster());
                        account.initAccountServices(XmppConnectionService.this); //roster needs to be loaded at this stage
                    }
                    getBitmapCache().evictAll();
                    loadPhoneContacts();
                    Log.d(Config.LOGTAG, "restoring messages...");
                    final long startMessageRestore = SystemClock.elapsedRealtime();
                    for (Conversation conversation : conversations) {
                        conversation.addAll(0, databaseBackend.getMessages(conversation, Config.PAGE_SIZE));
                        checkDeletedFiles(conversation);
                        conversation.findUnsentTextMessages(new Conversation.OnMessageFound() {

                            @Override
                            public void onMessageFound(Message message) {
                                markMessage(message, Message.STATUS_WAITING);
                            }
                        });
                        conversation.findUnreadMessages(new Conversation.OnMessageFound() {
                            @Override
                            public void onMessageFound(Message message) {
                                mNotificationService.pushFromBacklog(message);
                            }
                        });
                    }
                    mNotificationService.finishBacklog(false);
                    mRestoredFromDatabase = true;
                    final long diffMessageRestore = SystemClock.elapsedRealtime() - startMessageRestore;
                    Log.d(Config.LOGTAG, "finished restoring messages in " + diffMessageRestore + "ms");
                    updateConversationUi();
                }
            };
            mDatabaseReaderExecutor.execute(runnable); //will contain one write command (expiry) but that's fine
        }
    }

    public void loadPhoneContacts() {
        mContactMergerExecutor.execute(new Runnable() {
            @Override
            public void run() {
                PhoneHelper.loadPhoneContacts(XmppConnectionService.this, new OnPhoneContactsLoadedListener() {
                    @Override
                    public void onPhoneContactsLoaded(List<Bundle> phoneContacts) {
                        Log.d(Config.LOGTAG, "start merging phone contacts with roster");
                        for (Account account : accounts) {
                            List<Contact> withSystemAccounts = account.getRoster().getWithSystemAccounts();
                            for (Bundle phoneContact : phoneContacts) {
                                Jid jid;
                                try {
                                    jid = Jid.fromString(phoneContact.getString("jid"));
                                } catch (final InvalidJidException e) {
                                    continue;
                                }
                                final Contact contact = account.getRoster().getContact(jid);
                                String systemAccount = phoneContact.getInt("phoneid")
                                        + "#"
                                        + phoneContact.getString("lookup");
                                contact.setSystemAccount(systemAccount);
                                boolean needsCacheClean = contact.setPhotoUri(phoneContact.getString("photouri"));
                                needsCacheClean |= contact.setSystemName(phoneContact.getString("displayname"));
                                if (needsCacheClean) {
                                    getAvatarService().clear(contact);
                                }
                                withSystemAccounts.remove(contact);
                            }
                            for (Contact contact : withSystemAccounts) {
                                contact.setSystemAccount(null);
                                boolean needsCacheClean = contact.setPhotoUri(null);
                                needsCacheClean |= contact.setSystemName(null);
                                if (needsCacheClean) {
                                    getAvatarService().clear(contact);
                                }
                            }
                        }
                        Log.d(Config.LOGTAG, "finished merging phone contacts");
                        mShortcutService.refresh(mInitialAddressbookSyncCompleted.compareAndSet(false, true));
                        updateAccountUi();
                    }
                });
            }
        });
    }

    public List<Conversation> getConversations() {
        return this.conversations;
    }

    private void checkDeletedFiles(Conversation conversation) {
        conversation.findMessagesWithFiles(new Conversation.OnMessageFound() {

            @Override
            public void onMessageFound(Message message) {
                if (!getFileBackend().isFileAvailable(message)) {
                    message.setTransferable(new TransferablePlaceholder(Transferable.STATUS_DELETED));
                    final int s = message.getStatus();
                    if (s == Message.STATUS_WAITING || s == Message.STATUS_OFFERED || s == Message.STATUS_UNSEND) {
                        markMessage(message, Message.STATUS_SEND_FAILED);
                    }
                }
            }
        });
    }

    private void markFileDeleted(final String path) {
        Log.d(Config.LOGTAG, "deleted file " + path);
        for (Conversation conversation : getConversations()) {
            conversation.findMessagesWithFiles(new Conversation.OnMessageFound() {
                @Override
                public void onMessageFound(Message message) {
                    DownloadableFile file = fileBackend.getFile(message);
                    if (file.getAbsolutePath().equals(path)) {
                        if (!file.exists()) {
                            message.setTransferable(new TransferablePlaceholder(Transferable.STATUS_DELETED));
                            final int s = message.getStatus();
                            if (s == Message.STATUS_WAITING || s == Message.STATUS_OFFERED || s == Message.STATUS_UNSEND) {
                                markMessage(message, Message.STATUS_SEND_FAILED);
                            } else {
                                updateConversationUi();
                            }
                        } else {
                            Log.d(Config.LOGTAG, "found matching message for file " + path + " but file still exists");
                        }
                    }
                }
            });
        }
    }

    public void populateWithOrderedConversations(final List<Conversation> list) {
        populateWithOrderedConversations(list, true);
    }

    public void populateWithOrderedConversations(final List<Conversation> list, boolean includeNoFileUpload) {
        list.clear();
        if (includeNoFileUpload) {
            list.addAll(getConversations());
        } else {
            for (Conversation conversation : getConversations()) {
                if (conversation.getMode() == Conversation.MODE_SINGLE
                        || conversation.getAccount().httpUploadAvailable()) {
                    list.add(conversation);
                }
            }
        }
        try {
            Collections.sort(list);
        } catch (IllegalArgumentException e) {
            //ignore
        }
    }

    public void loadMoreMessages(final Conversation conversation, final long timestamp, final OnMoreMessagesLoaded callback) {
        if (XmppConnectionService.this.getMessageArchiveService().queryInProgress(conversation, callback)) {
            return;
        } else if (timestamp == 0) {
            return;
        }
        Log.d(Config.LOGTAG, "load more messages for " + conversation.getName() + " prior to " + MessageGenerator.getTimestamp(timestamp));
        Runnable runnable = new Runnable() {
            @Override
            public void run() {
                final Account account = conversation.getAccount();
                List<Message> messages = databaseBackend.getMessages(conversation, 50, timestamp);
                if (messages.size() > 0) {
                    conversation.addAll(0, messages);
                    checkDeletedFiles(conversation);
                    callback.onMoreMessagesLoaded(messages.size(), conversation);
                } else if (conversation.hasMessagesLeftOnServer()
                        && account.isOnlineAndConnected()
                        && conversation.getLastClearHistory().getTimestamp() == 0) {
                    if ((conversation.getMode() == Conversation.MODE_SINGLE && account.getXmppConnection().getFeatures().mam())
                            || (conversation.getMode() == Conversation.MODE_MULTI && conversation.getMucOptions().mamSupport())) {
                        MessageArchiveService.Query query = getMessageArchiveService().query(conversation, new MamReference(0), timestamp, false);
                        if (query != null) {
                            query.setCallback(callback);
                            callback.informUser(R.string.fetching_history_from_server);
                        } else {
                            callback.informUser(R.string.not_fetching_history_retention_period);
                        }
                    }
                }
            }
        };
        mDatabaseReaderExecutor.execute(runnable);
    }

    public List<Account> getAccounts() {
        return this.accounts;
    }

    public List<Conversation> findAllConferencesWith(Contact contact) {
        ArrayList<Conversation> results = new ArrayList<>();
        for (Conversation conversation : conversations) {
            if (conversation.getMode() == Conversation.MODE_MULTI
                    && conversation.getMucOptions().isContactInRoom(contact)) {
                results.add(conversation);
            }
        }
        return results;
    }

    public Conversation find(final Iterable<Conversation> haystack, final Contact contact) {
        for (final Conversation conversation : haystack) {
            if (conversation.getContact() == contact) {
                return conversation;
            }
        }
        return null;
    }

    public Conversation find(final Iterable<Conversation> haystack, final Account account, final Jid jid) {
        if (jid == null) {
            return null;
        }
        for (final Conversation conversation : haystack) {
            if ((account == null || conversation.getAccount() == account)
                    && (conversation.getJid().toBareJid().equals(jid.toBareJid()))) {
                return conversation;
            }
        }
        return null;
    }

    public Conversation findOrCreateConversation(Account account, Jid jid, boolean muc, final boolean async) {
        return this.findOrCreateConversation(account, jid, muc, false, async);
    }

    public Conversation findOrCreateConversation(final Account account, final Jid jid, final boolean muc, final boolean joinAfterCreate, final boolean async) {
        return this.findOrCreateConversation(account, jid, muc, joinAfterCreate, null, async);
    }

    public Conversation findOrCreateConversation(final Account account, final Jid jid, final boolean muc, final boolean joinAfterCreate, final MessageArchiveService.Query query, final boolean async) {
        synchronized (this.conversations) {
            Conversation conversation = find(account, jid);
            if (conversation != null) {
                return conversation;
            }
            conversation = databaseBackend.findConversation(account, jid);
            final boolean loadMessagesFromDb;
            if (conversation != null) {
                conversation.setStatus(Conversation.STATUS_AVAILABLE);
                conversation.setAccount(account);
                if (muc) {
                    conversation.setMode(Conversation.MODE_MULTI);
                    conversation.setContactJid(jid);
                } else {
                    conversation.setMode(Conversation.MODE_SINGLE);
                    conversation.setContactJid(jid.toBareJid());
                }
                databaseBackend.updateConversation(conversation);
                loadMessagesFromDb = conversation.messagesLoaded.compareAndSet(true,false);
            } else {
                String conversationName;
                Contact contact = account.getRoster().getContact(jid);
                if (contact != null) {
                    conversationName = contact.getDisplayName();
                } else {
                    conversationName = jid.getLocalpart();
                }
                if (muc) {
                    conversation = new Conversation(conversationName, account, jid,
                            Conversation.MODE_MULTI);
                } else {
                    conversation = new Conversation(conversationName, account, jid.toBareJid(),
                            Conversation.MODE_SINGLE);
                }
                this.databaseBackend.createConversation(conversation);
                loadMessagesFromDb = false;
            }
            final Conversation c = conversation;
            final Runnable runnable = new Runnable() {
                @Override
                public void run() {
                    if (loadMessagesFromDb) {
                        c.addAll(0, databaseBackend.getMessages(c, Config.PAGE_SIZE));
                        updateConversationUi();
                        c.messagesLoaded.set(true);
                    }
                    if (account.getXmppConnection() != null
                            && account.getXmppConnection().getFeatures().mam()
                            && !muc) {
                        if (query == null) {
                            mMessageArchiveService.query(c);
                        } else {
                            if (query.getConversation() == null) {
                                mMessageArchiveService.query(c, query.getStart(), query.isCatchup());
                            }
                        }
                    }
                    checkDeletedFiles(c);
                    if (joinAfterCreate) {
                        joinMuc(c);
                    }
                }
            };
            if (async) {
                mDatabaseReaderExecutor.execute(runnable);
            } else {
                runnable.run();
            }
            this.conversations.add(conversation);
            updateConversationUi();
            return conversation;
        }
    }

    public Conversation findConversation(final Account account, final Jid jid, final boolean muc) {
        synchronized (this.conversations) {
            Conversation conversation = find(account, jid);
            if (conversation != null) {
                return conversation;
            }
            conversation = databaseBackend.findConversation(account, jid);
            final boolean loadMessagesFromDb;
            if (conversation != null) {
                conversation.setStatus(Conversation.STATUS_AVAILABLE);
                conversation.setAccount(account);
                if (muc) {
                    conversation.setMode(Conversation.MODE_MULTI);
                    conversation.setContactJid(jid);
                } else {
                    conversation.setMode(Conversation.MODE_SINGLE);
                    conversation.setContactJid(jid.toBareJid());
                }
                databaseBackend.updateConversation(conversation);
                loadMessagesFromDb = conversation.messagesLoaded.compareAndSet(true,false);
            } else {
                String conversationName;
                Contact contact = account.getRoster().getContact(jid);
                if (contact != null) {
                    conversationName = contact.getDisplayName();
                } else {
                    conversationName = jid.getLocalpart();
                }
                if (muc) {
                    conversation = new Conversation(conversationName, account, jid,
                            Conversation.MODE_MULTI);
                } else {
                    conversation = new Conversation(conversationName, account, jid.toBareJid(),
                            Conversation.MODE_SINGLE);
                }
                this.databaseBackend.createConversation(conversation);
                loadMessagesFromDb = false;
            }
            final Conversation c = conversation;
            mDatabaseReaderExecutor.execute(new Runnable() {
                @Override
                public void run() {
                    if (loadMessagesFromDb) {
                        c.addAll(0, databaseBackend.getMessages(c, Config.PAGE_SIZE));
                        updateConversationUi();
                        c.messagesLoaded.set(true);
                    }
                    checkDeletedFiles(c);
                }
            });
            updateConversationUi();
            return conversation;
        }
    }

    public void archiveConversation(Conversation conversation) {
        getNotificationService().clear(conversation);
        conversation.setStatus(Conversation.STATUS_ARCHIVED);
        synchronized (this.conversations) {
            if (conversation.getMode() == Conversation.MODE_MULTI) {
                if (conversation.getAccount().getStatus() == Account.State.ONLINE) {
                    Bookmark bookmark = conversation.getBookmark();
                    if (bookmark != null && bookmark.autojoin() && respectAutojoin()) {
                        bookmark.setAutojoin(false);
                        pushBookmarks(bookmark.getAccount());
                    }
                }
                leaveMuc(conversation);
            } else {
                conversation.endOtrIfNeeded();
                if (conversation.getContact().getOption(Contact.Options.PENDING_SUBSCRIPTION_REQUEST)) {
                    Log.d(Config.LOGTAG, "Canceling presence request from " + conversation.getJid().toString());
                    sendPresencePacket(
                            conversation.getAccount(),
                            mPresenceGenerator.stopPresenceUpdatesTo(conversation.getContact())
                    );
                }
            }
            updateConversation(conversation);
            this.conversations.remove(conversation);
            updateConversationUi();
        }
    }

    public void createAccount(final Account account) {
        account.initAccountServices(this);
        databaseBackend.createAccount(account);
        this.accounts.add(account);
        this.reconnectAccountInBackground(account);
        updateAccountUi();
        syncEnabledAccountSetting();
        toggleForegroundService();
    }

    private void syncEnabledAccountSetting() {
        getPreferences().edit().putBoolean(EventReceiver.SETTING_ENABLED_ACCOUNTS, hasEnabledAccounts()).apply();
    }

    public void createAccountFromKey(final String alias, final OnAccountCreated callback) {
        new Thread(new Runnable() {
            @Override
            public void run() {
                try {
                    X509Certificate[] chain = KeyChain.getCertificateChain(XmppConnectionService.this, alias);
                    Pair<Jid, String> info = CryptoHelper.extractJidAndName(chain[0]);
                    if (info == null) {
                        callback.informUser(R.string.certificate_does_not_contain_jid);
                        return;
                    }
                    if (findAccountByJid(info.first) == null) {
                        Account account = new Account(info.first, "");
                        account.setPrivateKeyAlias(alias);
                        account.setOption(Account.OPTION_DISABLED, true);
                        account.setDisplayName(info.second);
                        createAccount(account);
                        callback.onAccountCreated(account);
                        if (Config.X509_VERIFICATION) {
                            try {
                                getMemorizingTrustManager().getNonInteractive(account.getJid().getDomainpart()).checkClientTrusted(chain, "RSA");
                            } catch (CertificateException e) {
                                callback.informUser(R.string.certificate_chain_is_not_trusted);
                            }
                        }
                    } else {
                        callback.informUser(R.string.account_already_exists);
                    }
                } catch (Exception e) {
                    e.printStackTrace();
                    callback.informUser(R.string.unable_to_parse_certificate);
                }
            }
        }).start();

    }

    public void updateKeyInAccount(final Account account, final String alias) {
        Log.d(Config.LOGTAG, account.getJid().toBareJid() + ": update key in account " + alias);
        try {
            X509Certificate[] chain = KeyChain.getCertificateChain(XmppConnectionService.this, alias);
            Log.d(Config.LOGTAG, account.getJid().toBareJid() + " loaded certificate chain");
            Pair<Jid, String> info = CryptoHelper.extractJidAndName(chain[0]);
            if (account.getJid().toBareJid().equals(info.first)) {
                account.setPrivateKeyAlias(alias);
                account.setDisplayName(info.second);
                databaseBackend.updateAccount(account);
                if (Config.X509_VERIFICATION) {
                    try {
                        getMemorizingTrustManager().getNonInteractive().checkClientTrusted(chain, "RSA");
                    } catch (CertificateException e) {
                        showErrorToastInUi(R.string.certificate_chain_is_not_trusted);
                    }
                    account.getAxolotlService().regenerateKeys(true);
                }
            } else {
                showErrorToastInUi(R.string.jid_does_not_match_certificate);
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    public boolean updateAccount(final Account account) {
        if (databaseBackend.updateAccount(account)) {
            account.setShowErrorNotification(true);
            this.statusListener.onStatusChanged(account);
            databaseBackend.updateAccount(account);
            reconnectAccountInBackground(account);
            updateAccountUi();
            getNotificationService().updateErrorNotification();
            toggleForegroundService();
            syncEnabledAccountSetting();
            return true;
        } else {
            return false;
        }
    }

    public void updateAccountPasswordOnServer(final Account account, final String newPassword, final OnAccountPasswordChanged callback) {
        final IqPacket iq = getIqGenerator().generateSetPassword(account, newPassword);
        sendIqPacket(account, iq, new OnIqPacketReceived() {
            @Override
            public void onIqPacketReceived(final Account account, final IqPacket packet) {
                if (packet.getType() == IqPacket.TYPE.RESULT) {
                    account.setPassword(newPassword);
                    account.setOption(Account.OPTION_MAGIC_CREATE, false);
                    databaseBackend.updateAccount(account);
                    callback.onPasswordChangeSucceeded();
                } else {
                    callback.onPasswordChangeFailed();
                }
            }
        });
    }

    public void deleteAccount(final Account account) {
        synchronized (this.conversations) {
            for (final Conversation conversation : conversations) {
                if (conversation.getAccount() == account) {
                    if (conversation.getMode() == Conversation.MODE_MULTI) {
                        leaveMuc(conversation);
                    } else if (conversation.getMode() == Conversation.MODE_SINGLE) {
                        conversation.endOtrIfNeeded();
                    }
                    conversations.remove(conversation);
                }
            }
            if (account.getXmppConnection() != null) {
                new Thread(new Runnable() {
                    @Override
                    public void run() {
                        disconnect(account, true);
                    }
                }).start();
            }
            Runnable runnable = new Runnable() {
                @Override
                public void run() {
                    if (!databaseBackend.deleteAccount(account)) {
                        Log.d(Config.LOGTAG, account.getJid().toBareJid() + ": unable to delete account");
                    }
                }
            };
            mDatabaseWriterExecutor.execute(runnable);
            this.accounts.remove(account);
            updateAccountUi();
            getNotificationService().updateErrorNotification();
            syncEnabledAccountSetting();
        }
    }

    public void setOnConversationListChangedListener(OnConversationUpdate listener) {
        synchronized (this) {
            this.mLastActivity = System.currentTimeMillis();
            if (checkListeners()) {
                switchToForeground();
            }
            this.mOnConversationUpdate = listener;
            this.mNotificationService.setIsInForeground(true);
            if (this.convChangedListenerCount < 2) {
                this.convChangedListenerCount++;
            }
        }
    }

    public void removeOnConversationListChangedListener() {
        synchronized (this) {
            this.convChangedListenerCount--;
            if (this.convChangedListenerCount <= 0) {
                this.convChangedListenerCount = 0;
                this.mOnConversationUpdate = null;
                this.mNotificationService.setIsInForeground(false);
                if (checkListeners()) {
                    switchToBackground();
                }
            }
        }
    }

    public void setOnShowErrorToastListener(OnShowErrorToast onShowErrorToast) {
        synchronized (this) {
            if (checkListeners()) {
                switchToForeground();
            }
            this.mOnShowErrorToast = onShowErrorToast;
            if (this.showErrorToastListenerCount < 2) {
                this.showErrorToastListenerCount++;
            }
        }
        this.mOnShowErrorToast = onShowErrorToast;
    }

    public void removeOnShowErrorToastListener() {
        synchronized (this) {
            this.showErrorToastListenerCount--;
            if (this.showErrorToastListenerCount <= 0) {
                this.showErrorToastListenerCount = 0;
                this.mOnShowErrorToast = null;
                if (checkListeners()) {
                    switchToBackground();
                }
            }
        }
    }

    public void setOnAccountListChangedListener(OnAccountUpdate listener) {
        synchronized (this) {
            if (checkListeners()) {
                switchToForeground();
            }
            this.mOnAccountUpdate = listener;
            if (this.accountChangedListenerCount < 2) {
                this.accountChangedListenerCount++;
            }
        }
    }

    public void removeOnAccountListChangedListener() {
        synchronized (this) {
            this.accountChangedListenerCount--;
            if (this.accountChangedListenerCount <= 0) {
                this.mOnAccountUpdate = null;
                this.accountChangedListenerCount = 0;
                if (checkListeners()) {
                    switchToBackground();
                }
            }
        }
    }

    public void setOnCaptchaRequestedListener(OnCaptchaRequested listener) {
        synchronized (this) {
            if (checkListeners()) {
                switchToForeground();
            }
            this.mOnCaptchaRequested = listener;
            if (this.captchaRequestedListenerCount < 2) {
                this.captchaRequestedListenerCount++;
            }
        }
    }

    public void removeOnCaptchaRequestedListener() {
        synchronized (this) {
            this.captchaRequestedListenerCount--;
            if (this.captchaRequestedListenerCount <= 0) {
                this.mOnCaptchaRequested = null;
                this.captchaRequestedListenerCount = 0;
                if (checkListeners()) {
                    switchToBackground();
                }
            }
        }
    }

    public void setOnRosterUpdateListener(final OnRosterUpdate listener) {
        synchronized (this) {
            if (checkListeners()) {
                switchToForeground();
            }
            this.mOnRosterUpdate = listener;
            if (this.rosterChangedListenerCount < 2) {
                this.rosterChangedListenerCount++;
            }
        }
    }

    public void removeOnRosterUpdateListener() {
        synchronized (this) {
            this.rosterChangedListenerCount--;
            if (this.rosterChangedListenerCount <= 0) {
                this.rosterChangedListenerCount = 0;
                this.mOnRosterUpdate = null;
                if (checkListeners()) {
                    switchToBackground();
                }
            }
        }
    }

    public void setOnUpdateBlocklistListener(final OnUpdateBlocklist listener) {
        synchronized (this) {
            if (checkListeners()) {
                switchToForeground();
            }
            this.mOnUpdateBlocklist = listener;
            if (this.updateBlocklistListenerCount < 2) {
                this.updateBlocklistListenerCount++;
            }
        }
    }

    public void removeOnUpdateBlocklistListener() {
        synchronized (this) {
            this.updateBlocklistListenerCount--;
            if (this.updateBlocklistListenerCount <= 0) {
                this.updateBlocklistListenerCount = 0;
                this.mOnUpdateBlocklist = null;
                if (checkListeners()) {
                    switchToBackground();
                }
            }
        }
    }

    public void setOnKeyStatusUpdatedListener(final OnKeyStatusUpdated listener) {
        synchronized (this) {
            if (checkListeners()) {
                switchToForeground();
            }
            this.mOnKeyStatusUpdated = listener;
            if (this.keyStatusUpdatedListenerCount < 2) {
                this.keyStatusUpdatedListenerCount++;
            }
        }
    }

    public void removeOnNewKeysAvailableListener() {
        synchronized (this) {
            this.keyStatusUpdatedListenerCount--;
            if (this.keyStatusUpdatedListenerCount <= 0) {
                this.keyStatusUpdatedListenerCount = 0;
                this.mOnKeyStatusUpdated = null;
                if (checkListeners()) {
                    switchToBackground();
                }
            }
        }
    }

    public void setOnMucRosterUpdateListener(OnMucRosterUpdate listener) {
        synchronized (this) {
            if (checkListeners()) {
                switchToForeground();
            }
            this.mOnMucRosterUpdate = listener;
            if (this.mucRosterChangedListenerCount < 2) {
                this.mucRosterChangedListenerCount++;
            }
        }
    }

    public void removeOnMucRosterUpdateListener() {
        synchronized (this) {
            this.mucRosterChangedListenerCount--;
            if (this.mucRosterChangedListenerCount <= 0) {
                this.mucRosterChangedListenerCount = 0;
                this.mOnMucRosterUpdate = null;
                if (checkListeners()) {
                    switchToBackground();
                }
            }
        }
    }

    public boolean checkListeners() {
        return (this.mOnAccountUpdate == null
                && this.mOnConversationUpdate == null
                && this.mOnRosterUpdate == null
                && this.mOnCaptchaRequested == null
                && this.mOnUpdateBlocklist == null
                && this.mOnShowErrorToast == null
                && this.mOnKeyStatusUpdated == null);
    }

    private void switchToForeground() {
        final boolean broadcastLastActivity = broadcastLastActivity();
        for (Conversation conversation : getConversations()) {
            if (conversation.getMode() == Conversation.MODE_MULTI) {
                conversation.getMucOptions().resetChatState();
            } else {
                conversation.setIncomingChatState(Config.DEFAULT_CHATSTATE);
            }
        }
        for (Account account : getAccounts()) {
            if (account.getStatus() == Account.State.ONLINE) {
                account.deactivateGracePeriod();
                final XmppConnection connection = account.getXmppConnection();
                if (connection != null) {
                    if (connection.getFeatures().csi()) {
                        connection.sendActive();
                    }
                    if (broadcastLastActivity) {
                        sendPresence(account, false); //send new presence but don't include idle because we are not
                    }
                }
            }
        }
        Log.d(Config.LOGTAG, "app switched into foreground");
    }

    private void switchToBackground() {
        final boolean broadcastLastActivity = broadcastLastActivity();
        for (Account account : getAccounts()) {
            if (account.getStatus() == Account.State.ONLINE) {
                XmppConnection connection = account.getXmppConnection();
                if (connection != null) {
                    if (broadcastLastActivity) {
                        sendPresence(account, broadcastLastActivity);
                    }
                    if (connection.getFeatures().csi()) {
                        connection.sendInactive();
                    }
                }
            }
        }
        this.mNotificationService.setIsInForeground(false);
        Log.d(Config.LOGTAG, "app switched into background");
    }

    private void connectMultiModeConversations(Account account) {
        List<Conversation> conversations = getConversations();
        for (Conversation conversation : conversations) {
            if (conversation.getMode() == Conversation.MODE_MULTI && conversation.getAccount() == account) {
                joinMuc(conversation);
            }
        }
    }

    public void joinMuc(Conversation conversation) {
        joinMuc(conversation, null, false);
    }

    public void joinMuc(Conversation conversation, boolean followedInvite) {
        joinMuc(conversation, null, followedInvite);
    }

    private void joinMuc(Conversation conversation, final OnConferenceJoined onConferenceJoined) {
        joinMuc(conversation, onConferenceJoined, false);
    }

    private void joinMuc(Conversation conversation, final OnConferenceJoined onConferenceJoined, final boolean followedInvite) {
        Account account = conversation.getAccount();
        account.pendingConferenceJoins.remove(conversation);
        account.pendingConferenceLeaves.remove(conversation);
        if (account.getStatus() == Account.State.ONLINE) {

            // disabled for testing strange MUC leaves
            // sendPresencePacket(account, mPresenceGenerator.leave(conversation.getMucOptions()));
            //
            conversation.resetMucOptions();
            if (onConferenceJoined != null) {
                conversation.getMucOptions().flagNoAutoPushConfiguration();
            }
            conversation.setHasMessagesLeftOnServer(false);
            fetchConferenceConfiguration(conversation, new OnConferenceConfigurationFetched() {

                private void join(Conversation conversation) {
                    Account account = conversation.getAccount();
                    final MucOptions mucOptions = conversation.getMucOptions();
                    final Jid joinJid = mucOptions.getSelf().getFullJid();
                    Log.d(Config.LOGTAG, account.getJid().toBareJid().toString() + ": joining conversation " + joinJid.toString());
                    PresencePacket packet = mPresenceGenerator.selfPresence(account, Presence.Status.ONLINE, mucOptions.nonanonymous() || onConferenceJoined != null);
                    packet.setTo(joinJid);
                    Element x = packet.addChild("x", "http://jabber.org/protocol/muc");
                    if (conversation.getMucOptions().getPassword() != null) {
                        x.addChild("password").setContent(mucOptions.getPassword());
                    }

                    if (mucOptions.mamSupport()) {
                        // Use MAM instead of the limited muc history to get history
                        x.addChild("history").setAttribute("maxchars", "0");
                    } else {
                        // Fallback to muc history
                        x.addChild("history").setAttribute("since", PresenceGenerator.getTimestamp(conversation.getLastMessageTransmitted().getTimestamp()));
                    }
                    sendPresencePacket(account, packet);
                    if (onConferenceJoined != null) {
                        onConferenceJoined.onConferenceJoined(conversation);
                    }
                    if (!joinJid.equals(conversation.getJid())) {
                        conversation.setContactJid(joinJid);
                        databaseBackend.updateConversation(conversation);
                    }

                    if (mucOptions.mamSupport()) {
                        getMessageArchiveService().catchupMUC(conversation);
                    }
                    if (mucOptions.membersOnly() && mucOptions.nonanonymous()) {
                        fetchConferenceMembers(conversation);
                        if (followedInvite && conversation.getBookmark() == null) {
                            saveConversationAsBookmark(conversation, null);
                        }
                    }
                    sendUnsentMessages(conversation);
                }

                @Override
                public void onConferenceConfigurationFetched(Conversation conversation) {
                    join(conversation);
                }

                @Override
                public void onFetchFailed(final Conversation conversation, Element error) {
                    if (error != null && "remote-server-not-found".equals(error.getName())) {
                        conversation.getMucOptions().setError(MucOptions.Error.SERVER_NOT_FOUND);
                        updateConversationUi();
                    } else {
                        join(conversation);
                        fetchConferenceConfiguration(conversation);
                    }
                }
            });
            updateConversationUi();
        } else {
            account.pendingConferenceJoins.add(conversation);
            conversation.resetMucOptions();
            conversation.setHasMessagesLeftOnServer(false);
            updateConversationUi();
        }
    }

    private void fetchConferenceMembers(final Conversation conversation) {
        final Account account = conversation.getAccount();
        final AxolotlService axolotlService = account.getAxolotlService();
        final String[] affiliations = {"member", "admin", "owner"};
        OnIqPacketReceived callback = new OnIqPacketReceived() {

            private int i = 0;
            private boolean success = true;

            @Override
            public void onIqPacketReceived(Account account, IqPacket packet) {

                Element query = packet.query("http://jabber.org/protocol/muc#admin");
                if (packet.getType() == IqPacket.TYPE.RESULT && query != null) {
                    for (Element child : query.getChildren()) {
                        if ("item".equals(child.getName())) {
                            MucOptions.User user = AbstractParser.parseItem(conversation, child);
                            if (!user.realJidMatchesAccount()) {
                                boolean isNew = conversation.getMucOptions().updateUser(user);
                                if (isNew && user.getRealJid() != null && axolotlService.hasEmptyDeviceList(user.getRealJid())) {
                                    axolotlService.fetchDeviceIds(user.getRealJid());
                                }
                            }
                        }
                    }
                } else {
                    success = false;
                    Log.d(Config.LOGTAG, account.getJid().toBareJid() + ": could not request affiliation " + affiliations[i] + " in " + conversation.getJid().toBareJid());
                }
                ++i;
                if (i >= affiliations.length) {
                    List<Jid> members = conversation.getMucOptions().getMembers();
                    if (success) {
                        List<Jid> cryptoTargets = conversation.getAcceptedCryptoTargets();
                        boolean changed = false;
                        for (ListIterator<Jid> iterator = cryptoTargets.listIterator(); iterator.hasNext(); ) {
                            Jid jid = iterator.next();
                            if (!members.contains(jid)) {
                                iterator.remove();
                                Log.d(Config.LOGTAG, account.getJid().toBareJid() + ": removed " + jid + " from crypto targets of " + conversation.getName());
                                changed = true;
                            }
                        }
                        if (changed) {
                            conversation.setAcceptedCryptoTargets(cryptoTargets);
                            updateConversation(conversation);
                        }
                    }
                    Log.d(Config.LOGTAG, account.getJid().toBareJid() + ": retrieved members for " + conversation.getJid().toBareJid() + ": " + conversation.getMucOptions().getMembers());
                    getAvatarService().clear(conversation);
                    updateMucRosterUi();
                    updateConversationUi();
                }
            }
        };
        for (String affiliation : affiliations) {
            sendIqPacket(account, mIqGenerator.queryAffiliation(conversation, affiliation), callback);
        }
        Log.d(Config.LOGTAG, account.getJid().toBareJid() + ": fetching members for " + conversation.getName());
    }

    public void providePasswordForMuc(Conversation conversation, String password) {
        if (conversation.getMode() == Conversation.MODE_MULTI) {
            conversation.getMucOptions().setPassword(password);
            if (conversation.getBookmark() != null) {
                if (respectAutojoin()) {
                    conversation.getBookmark().setAutojoin(true);
                }
                pushBookmarks(conversation.getAccount());
            }
            updateConversation(conversation);
            joinMuc(conversation);
        }
    }

    private boolean hasEnabledAccounts() {
        for(Account account : this.accounts) {
            if (account.isEnabled()) {
                return true;
            }
        }
        return false;
    }

    public void renameInMuc(final Conversation conversation, final String nick, final UiCallback<Conversation> callback) {
        final MucOptions options = conversation.getMucOptions();
        final Jid joinJid = options.createJoinJid(nick);
        if (options.online()) {
            Account account = conversation.getAccount();
            options.setOnRenameListener(new OnRenameListener() {

                @Override
                public void onSuccess() {
                    conversation.setContactJid(joinJid);
                    databaseBackend.updateConversation(conversation);
                    Bookmark bookmark = conversation.getBookmark();
                    if (bookmark != null) {
                        bookmark.setNick(nick);
                        pushBookmarks(bookmark.getAccount());
                    }
                    callback.success(conversation);
                }

                @Override
                public void onFailure() {
                    callback.error(R.string.nick_in_use, conversation);
                }
            });

            PresencePacket packet = new PresencePacket();
            packet.setTo(joinJid);
            packet.setFrom(conversation.getAccount().getJid());

            String sig = account.getPgpSignature();
            if (sig != null) {
                packet.addChild("status").setContent("online");
                packet.addChild("x", "jabber:x:signed").setContent(sig);
            }
            sendPresencePacket(account, packet);
        } else {
            conversation.setContactJid(joinJid);
            databaseBackend.updateConversation(conversation);
            if (conversation.getAccount().getStatus() == Account.State.ONLINE) {
                Bookmark bookmark = conversation.getBookmark();
                if (bookmark != null) {
                    bookmark.setNick(nick);
                    pushBookmarks(bookmark.getAccount());
                }
                joinMuc(conversation);
            }
        }
    }

    public void leaveMuc(Conversation conversation) {
        leaveMuc(conversation, false);
    }

    private void leaveMuc(Conversation conversation, boolean now) {
        Account account = conversation.getAccount();
        account.pendingConferenceJoins.remove(conversation);
        account.pendingConferenceLeaves.remove(conversation);
        if (account.getStatus() == Account.State.ONLINE || now) {
            sendPresencePacket(conversation.getAccount(), mPresenceGenerator.leave(conversation.getMucOptions()));
            conversation.getMucOptions().setOffline();
            conversation.deregisterWithBookmark();
            Log.d(Config.LOGTAG, conversation.getAccount().getJid().toBareJid() + ": leaving muc " + conversation.getJid());
        } else {
            account.pendingConferenceLeaves.add(conversation);
        }
    }

    public String findConferenceServer(final Account account) {
        String server;
        if (account.getXmppConnection() != null) {
            server = account.getXmppConnection().getMucServer();
            if (server != null) {
                return server;
            }
        }
        for (Account other : getAccounts()) {
            if (other != account && other.getXmppConnection() != null) {
                server = other.getXmppConnection().getMucServer();
                if (server != null) {
                    return server;
                }
            }
        }
        return null;
    }

    public boolean createAdhocConference(final Account account,
                                         final String subject,
                                         final Iterable<Jid> jids,
                                         final UiCallback<Conversation> callback) {
        Log.d(Config.LOGTAG, account.getJid().toBareJid().toString() + ": creating adhoc conference with " + jids.toString());
        if (account.getStatus() == Account.State.ONLINE) {
            try {
                String server = findConferenceServer(account);
                if (server == null) {
                    if (callback != null) {
                        callback.error(R.string.no_conference_server_found, null);
                    }
                    return false;
                }
                final Jid jid = Jid.fromParts(new BigInteger(64, getRNG()).toString(Character.MAX_RADIX), server, null);
                final Conversation conversation = findOrCreateConversation(account, jid, true, false, true);
                joinMuc(conversation, new OnConferenceJoined() {
                    @Override
                    public void onConferenceJoined(final Conversation conversation) {
                        pushConferenceConfiguration(conversation, IqGenerator.defaultRoomConfiguration(), new OnConfigurationPushed() {
                            @Override
                            public void onPushSucceeded() {
                                if (subject != null && !subject.trim().isEmpty()) {
                                    pushSubjectToConference(conversation, subject.trim());
                                }
                                for (Jid invite : jids) {
                                    invite(conversation, invite);
                                }
                                if (account.countPresences() > 1) {
                                    directInvite(conversation, account.getJid().toBareJid());
                                }
                                saveConversationAsBookmark(conversation, subject);
                                if (callback != null) {
                                    callback.success(conversation);
                                }
                            }

                            @Override
                            public void onPushFailed() {
                                archiveConversation(conversation);
                                if (callback != null) {
                                    callback.error(R.string.conference_creation_failed, conversation);
                                }
                            }
                        });
                    }
                });
                return true;
            } catch (InvalidJidException e) {
                if (callback != null) {
                    callback.error(R.string.conference_creation_failed, null);
                }
                return true;
            }
        } else {
            if (callback != null) {
                callback.error(R.string.not_connected_try_again, null);
            }
            return true;
        }
    }

    public void fetchConferenceConfiguration(final Conversation conversation) {
        fetchConferenceConfiguration(conversation, null);
    }

    public void fetchConferenceConfiguration(final Conversation conversation, final OnConferenceConfigurationFetched callback) {
        IqPacket request = new IqPacket(IqPacket.TYPE.GET);
        request.setTo(conversation.getJid().toBareJid());
        request.query("http://jabber.org/protocol/disco#info");
        sendIqPacket(conversation.getAccount(), request, new OnIqPacketReceived() {
            @Override
            public void onIqPacketReceived(Account account, IqPacket packet) {
                Element query = packet.findChild("query", "http://jabber.org/protocol/disco#info");
                if (packet.getType() == IqPacket.TYPE.RESULT && query != null) {
                    ArrayList<String> features = new ArrayList<>();
                    for (Element child : query.getChildren()) {
                        if (child != null && child.getName().equals("feature")) {
                            String var = child.getAttribute("var");
                            if (var != null) {
                                features.add(var);
                            }
                        }
                    }
                    Element form = query.findChild("x", "jabber:x:data");
                    if (form != null) {
                        conversation.getMucOptions().updateFormData(Data.parse(form));
                    }
                    conversation.getMucOptions().updateFeatures(features);
                    if (callback != null) {
                        callback.onConferenceConfigurationFetched(conversation);
                    }
                    Log.d(Config.LOGTAG, account.getJid().toBareJid() + ": fetched muc configuration for " + conversation.getJid().toBareJid() + " - " + features.toString());
                    updateConversationUi();
                } else if (packet.getType() == IqPacket.TYPE.ERROR) {
                    if (callback != null) {
                        callback.onFetchFailed(conversation, packet.getError());
                    }
                }
            }
        });
    }

    public void pushNodeConfiguration(Account account, final String node, final Bundle options, final OnConfigurationPushed callback) {
        pushNodeConfiguration(account, account.getJid().toBareJid(), node, options, callback);
    }

    public void pushNodeConfiguration(Account account, final Jid jid, final String node, final Bundle options, final OnConfigurationPushed callback) {
        sendIqPacket(account, mIqGenerator.requestPubsubConfiguration(jid, node), new OnIqPacketReceived() {
            @Override
            public void onIqPacketReceived(Account account, IqPacket packet) {
                if (packet.getType() == IqPacket.TYPE.RESULT) {
                    Element pubsub = packet.findChild("pubsub", "http://jabber.org/protocol/pubsub#owner");
                    Element configuration = pubsub == null ? null : pubsub.findChild("configure");
                    Element x = configuration == null ? null : configuration.findChild("x", "jabber:x:data");
                    if (x != null) {
                        Data data = Data.parse(x);
                        data.submit(options);
                        sendIqPacket(account, mIqGenerator.publishPubsubConfiguration(jid, node, data), new OnIqPacketReceived() {
                            @Override
                            public void onIqPacketReceived(Account account, IqPacket packet) {
                                if (packet.getType() == IqPacket.TYPE.RESULT && callback != null) {
                                    callback.onPushSucceeded();
                                } else {
                                    Log.d(Config.LOGTAG, packet.toString());
                                }
                            }
                        });
                    } else if (callback != null) {
                        callback.onPushFailed();
                    }
                } else if (callback != null) {
                    callback.onPushFailed();
                }
            }
        });
    }

    public void pushConferenceConfiguration(final Conversation conversation, final Bundle options, final OnConfigurationPushed callback) {
        IqPacket request = new IqPacket(IqPacket.TYPE.GET);
        request.setTo(conversation.getJid().toBareJid());
        request.query("http://jabber.org/protocol/muc#owner");
        sendIqPacket(conversation.getAccount(), request, new OnIqPacketReceived() {
            @Override
            public void onIqPacketReceived(Account account, IqPacket packet) {
                if (packet.getType() == IqPacket.TYPE.RESULT) {
                    Data data = Data.parse(packet.query().findChild("x", "jabber:x:data"));
                    data.submit(options);
                    IqPacket set = new IqPacket(IqPacket.TYPE.SET);
                    set.setTo(conversation.getJid().toBareJid());
                    set.query("http://jabber.org/protocol/muc#owner").addChild(data);
                    sendIqPacket(account, set, new OnIqPacketReceived() {
                        @Override
                        public void onIqPacketReceived(Account account, IqPacket packet) {
                            if (callback != null) {
                                if (packet.getType() == IqPacket.TYPE.RESULT) {
                                    callback.onPushSucceeded();
                                } else {
                                    callback.onPushFailed();
                                }
                            }
                        }
                    });
                } else {
                    if (callback != null) {
                        callback.onPushFailed();
                    }
                }
            }
        });
    }

    public void pushSubjectToConference(final Conversation conference, final String subject) {
        MessagePacket packet = this.getMessageGenerator().conferenceSubject(conference, subject);
        this.sendMessagePacket(conference.getAccount(), packet);
        final MucOptions mucOptions = conference.getMucOptions();
        final MucOptions.User self = mucOptions.getSelf();
        if (!mucOptions.persistent() && self.getAffiliation().ranks(MucOptions.Affiliation.OWNER)) {
            Bundle options = new Bundle();
            options.putString("muc#roomconfig_persistentroom", "1");
            this.pushConferenceConfiguration(conference, options, null);
        }
    }

    public void changeAffiliationInConference(final Conversation conference, Jid user, final MucOptions.Affiliation affiliation, final OnAffiliationChanged callback) {
        final Jid jid = user.toBareJid();
        IqPacket request = this.mIqGenerator.changeAffiliation(conference, jid, affiliation.toString());
        sendIqPacket(conference.getAccount(), request, new OnIqPacketReceived() {
            @Override
            public void onIqPacketReceived(Account account, IqPacket packet) {
                if (packet.getType() == IqPacket.TYPE.RESULT) {
                    conference.getMucOptions().changeAffiliation(jid, affiliation);
                    getAvatarService().clear(conference);
                    callback.onAffiliationChangedSuccessful(jid);
                } else {
                    callback.onAffiliationChangeFailed(jid, R.string.could_not_change_affiliation);
                }
            }
        });
    }

    public void changeAffiliationsInConference(final Conversation conference, MucOptions.Affiliation before, MucOptions.Affiliation after) {
        List<Jid> jids = new ArrayList<>();
        for (MucOptions.User user : conference.getMucOptions().getUsers()) {
            if (user.getAffiliation() == before && user.getRealJid() != null) {
                jids.add(user.getRealJid());
            }
        }
        IqPacket request = this.mIqGenerator.changeAffiliation(conference, jids, after.toString());
        sendIqPacket(conference.getAccount(), request, mDefaultIqHandler);
    }

    public void changeRoleInConference(final Conversation conference, final String nick, MucOptions.Role role, final OnRoleChanged callback) {
        IqPacket request = this.mIqGenerator.changeRole(conference, nick, role.toString());
        Log.d(Config.LOGTAG, request.toString());
        sendIqPacket(conference.getAccount(), request, new OnIqPacketReceived() {
            @Override
            public void onIqPacketReceived(Account account, IqPacket packet) {
                Log.d(Config.LOGTAG, packet.toString());
                if (packet.getType() == IqPacket.TYPE.RESULT) {
                    callback.onRoleChangedSuccessful(nick);
                } else {
                    callback.onRoleChangeFailed(nick, R.string.could_not_change_role);
                }
            }
        });
    }

    private void disconnect(Account account, boolean force) {
        if ((account.getStatus() == Account.State.ONLINE)
                || (account.getStatus() == Account.State.DISABLED)) {
            final XmppConnection connection = account.getXmppConnection();
            if (!force) {
                List<Conversation> conversations = getConversations();
                for (Conversation conversation : conversations) {
                    if (conversation.getAccount() == account) {
                        if (conversation.getMode() == Conversation.MODE_MULTI) {
                            leaveMuc(conversation, true);
                        } else {
                            if (conversation.endOtrIfNeeded()) {
                                Log.d(Config.LOGTAG, account.getJid().toBareJid()
                                        + ": ended otr session with "
                                        + conversation.getJid());
                            }
                        }
                    }
                }
                sendOfflinePresence(account);
            }
            connection.disconnect(force);
        }
    }

    @Override
    public IBinder onBind(Intent intent) {
        return mBinder;
    }

    public void updateMessage(Message message) {
        databaseBackend.updateMessage(message);
        updateConversationUi();
    }

    public void updateMessage(Message message, String uuid) {
        databaseBackend.updateMessage(message, uuid);
        updateConversationUi();
    }

    protected void syncDirtyContacts(Account account) {
        for (Contact contact : account.getRoster().getContacts()) {
            if (contact.getOption(Contact.Options.DIRTY_PUSH)) {
                pushContactToServer(contact);
            }
            if (contact.getOption(Contact.Options.DIRTY_DELETE)) {
                deleteContactOnServer(contact);
            }
        }
    }

    public void createContact(Contact contact) {
        boolean autoGrant = getBooleanPreference("grant_new_contacts", R.bool.grant_new_contacts);
        if (autoGrant) {
            contact.setOption(Contact.Options.PREEMPTIVE_GRANT);
            contact.setOption(Contact.Options.ASKING);
        }
        pushContactToServer(contact);
    }

    public void onOtrSessionEstablished(Conversation conversation) {
        final Account account = conversation.getAccount();
        final Session otrSession = conversation.getOtrSession();
        Log.d(Config.LOGTAG,
                account.getJid().toBareJid() + " otr session established with "
                        + conversation.getJid() + "/"
                        + otrSession.getSessionID().getUserID());
        conversation.findUnsentMessagesWithEncryption(Message.ENCRYPTION_OTR, new Conversation.OnMessageFound() {

            @Override
            public void onMessageFound(Message message) {
                SessionID id = otrSession.getSessionID();
                try {
                    message.setCounterpart(Jid.fromString(id.getAccountID() + "/" + id.getUserID()));
                } catch (InvalidJidException e) {
                    return;
                }
                if (message.needsUploading()) {
                    mJingleConnectionManager.createNewConnection(message);
                } else {
                    MessagePacket outPacket = mMessageGenerator.generateOtrChat(message);
                    if (outPacket != null) {
                        mMessageGenerator.addDelay(outPacket, message.getTimeSent());
                        message.setStatus(Message.STATUS_SEND);
                        databaseBackend.updateMessage(message);
                        sendMessagePacket(account, outPacket);
                    }
                }
                updateConversationUi();
            }
        });
    }

    public boolean renewSymmetricKey(Conversation conversation) {
        Account account = conversation.getAccount();
        byte[] symmetricKey = new byte[32];
        this.mRandom.nextBytes(symmetricKey);
        Session otrSession = conversation.getOtrSession();
        if (otrSession != null) {
            MessagePacket packet = new MessagePacket();
            packet.setType(MessagePacket.TYPE_CHAT);
            packet.setFrom(account.getJid());
            MessageGenerator.addMessageHints(packet);
            packet.setAttribute("to", otrSession.getSessionID().getAccountID() + "/"
                    + otrSession.getSessionID().getUserID());
            try {
                packet.setBody(otrSession
                        .transformSending(CryptoHelper.FILETRANSFER
                                + CryptoHelper.bytesToHex(symmetricKey))[0]);
                sendMessagePacket(account, packet);
                conversation.setSymmetricKey(symmetricKey);
                return true;
            } catch (OtrException e) {
                return false;
            }
        }
        return false;
    }

    public void pushContactToServer(final Contact contact) {
        contact.resetOption(Contact.Options.DIRTY_DELETE);
        contact.setOption(Contact.Options.DIRTY_PUSH);
        final Account account = contact.getAccount();
        if (account.getStatus() == Account.State.ONLINE) {
            final boolean ask = contact.getOption(Contact.Options.ASKING);
            final boolean sendUpdates = contact
                    .getOption(Contact.Options.PENDING_SUBSCRIPTION_REQUEST)
                    && contact.getOption(Contact.Options.PREEMPTIVE_GRANT);
            final IqPacket iq = new IqPacket(IqPacket.TYPE.SET);
            iq.query(Namespace.ROSTER).addChild(contact.asElement());
            account.getXmppConnection().sendIqPacket(iq, mDefaultIqHandler);
            if (sendUpdates) {
                sendPresencePacket(account,
                        mPresenceGenerator.sendPresenceUpdatesTo(contact));
            }
            if (ask) {
                sendPresencePacket(account,
                        mPresenceGenerator.requestPresenceUpdatesFrom(contact));
            }
        }
    }

    public void publishAvatar(Account account, Uri image, UiCallback<Avatar> callback) {
        final Bitmap.CompressFormat format = Config.AVATAR_FORMAT;
        final int size = Config.AVATAR_SIZE;
        final Avatar avatar = getFileBackend().getPepAvatar(image, size, format);
        if (avatar != null) {
            avatar.height = size;
            avatar.width = size;
            if (format.equals(Bitmap.CompressFormat.WEBP)) {
                avatar.type = "image/webp";
            } else if (format.equals(Bitmap.CompressFormat.JPEG)) {
                avatar.type = "image/jpeg";
            } else if (format.equals(Bitmap.CompressFormat.PNG)) {
                avatar.type = "image/png";
            }
            if (!getFileBackend().save(avatar)) {
                callback.error(R.string.error_saving_avatar, avatar);
                return;
            }
            publishAvatar(account, avatar, callback);
        } else {
            callback.error(R.string.error_publish_avatar_converting, null);
        }
    }

    public void publishAvatar(Account account, final Avatar avatar, final UiCallback<Avatar> callback) {
        IqPacket packet = this.mIqGenerator.publishAvatar(avatar);
        this.sendIqPacket(account, packet, new OnIqPacketReceived() {

            @Override
            public void onIqPacketReceived(Account account, IqPacket result) {
                if (result.getType() == IqPacket.TYPE.RESULT) {
                    final IqPacket packet = XmppConnectionService.this.mIqGenerator.publishAvatarMetadata(avatar);
                    sendIqPacket(account, packet, new OnIqPacketReceived() {
                        @Override
                        public void onIqPacketReceived(Account account, IqPacket result) {
                            if (result.getType() == IqPacket.TYPE.RESULT) {
                                if (account.setAvatar(avatar.getFilename())) {
                                    getAvatarService().clear(account);
                                    databaseBackend.updateAccount(account);
                                }
                                Log.d(Config.LOGTAG,account.getJid().toBareJid()+": published avatar "+(avatar.size/1024)+"KiB");
                                if (callback != null) {
                                    callback.success(avatar);
                                }
                            } else {
                                if (callback != null) {
                                    callback.error(R.string.error_publish_avatar_server_reject,avatar);
                                }
                            }
                        }
                    });
                } else {
                    Element error = result.findChild("error");
                    Log.d(Config.LOGTAG,account.getJid().toBareJid()+": server rejected avatar "+(avatar.size/1024)+"KiB "+(error!=null?error.toString():""));
                    if (callback != null) {
                        callback.error(R.string.error_publish_avatar_server_reject, avatar);
                    }
                }
            }
        });
    }

    public void republishAvatarIfNeeded(Account account) {
        if (account.getAxolotlService().isPepBroken()) {
            Log.d(Config.LOGTAG, account.getJid().toBareJid() + ": skipping republication of avatar because pep is broken");
            return;
        }
        IqPacket packet = this.mIqGenerator.retrieveAvatarMetaData(null);
        this.sendIqPacket(account, packet, new OnIqPacketReceived() {

            private Avatar parseAvatar(IqPacket packet) {
                Element pubsub = packet.findChild("pubsub", "http://jabber.org/protocol/pubsub");
                if (pubsub != null) {
                    Element items = pubsub.findChild("items");
                    if (items != null) {
                        return Avatar.parseMetadata(items);
                    }
                }
                return null;
            }

            private boolean errorIsItemNotFound(IqPacket packet) {
                Element error = packet.findChild("error");
                return packet.getType() == IqPacket.TYPE.ERROR
                        && error != null
                        && error.hasChild("item-not-found");
            }

            @Override
            public void onIqPacketReceived(Account account, IqPacket packet) {
                if (packet.getType() == IqPacket.TYPE.RESULT || errorIsItemNotFound(packet)) {
                    Avatar serverAvatar = parseAvatar(packet);
                    if (serverAvatar == null && account.getAvatar() != null) {
                        Avatar avatar = fileBackend.getStoredPepAvatar(account.getAvatar());
                        if (avatar != null) {
                            Log.d(Config.LOGTAG, account.getJid().toBareJid() + ": avatar on server was null. republishing");
                            publishAvatar(account, fileBackend.getStoredPepAvatar(account.getAvatar()), null);
                        } else {
                            Log.e(Config.LOGTAG, account.getJid().toBareJid() + ": error rereading avatar");
                        }
                    }
                }
            }
        });
    }

    public void fetchAvatar(Account account, Avatar avatar) {
        fetchAvatar(account, avatar, null);
    }

    public void fetchAvatar(Account account, final Avatar avatar, final UiCallback<Avatar> callback) {
        final String KEY = generateFetchKey(account, avatar);
        synchronized (this.mInProgressAvatarFetches) {
            if (!this.mInProgressAvatarFetches.contains(KEY)) {
                switch (avatar.origin) {
                    case PEP:
                        this.mInProgressAvatarFetches.add(KEY);
                        fetchAvatarPep(account, avatar, callback);
                        break;
                    case VCARD:
                        this.mInProgressAvatarFetches.add(KEY);
                        fetchAvatarVcard(account, avatar, callback);
                        break;
                }
            }
        }
    }

    private void fetchAvatarPep(Account account, final Avatar avatar, final UiCallback<Avatar> callback) {
        IqPacket packet = this.mIqGenerator.retrievePepAvatar(avatar);
        sendIqPacket(account, packet, new OnIqPacketReceived() {

            @Override
            public void onIqPacketReceived(Account account, IqPacket result) {
                synchronized (mInProgressAvatarFetches) {
                    mInProgressAvatarFetches.remove(generateFetchKey(account, avatar));
                }
                final String ERROR = account.getJid().toBareJid()
                        + ": fetching avatar for " + avatar.owner + " failed ";
                if (result.getType() == IqPacket.TYPE.RESULT) {
                    avatar.image = mIqParser.avatarData(result);
                    if (avatar.image != null) {
                        if (getFileBackend().save(avatar)) {
                            if (account.getJid().toBareJid().equals(avatar.owner)) {
                                if (account.setAvatar(avatar.getFilename())) {
                                    databaseBackend.updateAccount(account);
                                }
                                getAvatarService().clear(account);
                                updateConversationUi();
                                updateAccountUi();
                            } else {
                                Contact contact = account.getRoster()
                                        .getContact(avatar.owner);
                                contact.setAvatar(avatar);
                                getAvatarService().clear(contact);
                                updateConversationUi();
                                updateRosterUi();
                            }
                            if (callback != null) {
                                callback.success(avatar);
                            }
                            Log.d(Config.LOGTAG, account.getJid().toBareJid()
                                    + ": successfully fetched pep avatar for " + avatar.owner);
                            return;
                        }
                    } else {

                        Log.d(Config.LOGTAG, ERROR + "(parsing error)");
                    }
                } else {
                    Element error = result.findChild("error");
                    if (error == null) {
                        Log.d(Config.LOGTAG, ERROR + "(server error)");
                    } else {
                        Log.d(Config.LOGTAG, ERROR + error.toString());
                    }
                }
                if (callback != null) {
                    callback.error(0, null);
                }

            }
        });
    }

    private void fetchAvatarVcard(final Account account, final Avatar avatar, final UiCallback<Avatar> callback) {
        IqPacket packet = this.mIqGenerator.retrieveVcardAvatar(avatar);
        this.sendIqPacket(account, packet, new OnIqPacketReceived() {
            @Override
            public void onIqPacketReceived(Account account, IqPacket packet) {
                synchronized (mInProgressAvatarFetches) {
                    mInProgressAvatarFetches.remove(generateFetchKey(account, avatar));
                }
                if (packet.getType() == IqPacket.TYPE.RESULT) {
                    Element vCard = packet.findChild("vCard", "vcard-temp");
                    Element photo = vCard != null ? vCard.findChild("PHOTO") : null;
                    String image = photo != null ? photo.findChildContent("BINVAL") : null;
                    if (image != null) {
                        avatar.image = image;
                        if (getFileBackend().save(avatar)) {
                            Log.d(Config.LOGTAG, account.getJid().toBareJid()
                                    + ": successfully fetched vCard avatar for " + avatar.owner);
                            if (avatar.owner.isBareJid()) {
                                if (account.getJid().toBareJid().equals(avatar.owner) && account.getAvatar() == null) {
                                    Log.d(Config.LOGTAG, account.getJid().toBareJid() + ": had no avatar. replacing with vcard");
                                    account.setAvatar(avatar.getFilename());
                                    databaseBackend.updateAccount(account);
                                    getAvatarService().clear(account);
                                    updateAccountUi();
                                } else {
                                    Contact contact = account.getRoster().getContact(avatar.owner);
                                    contact.setAvatar(avatar);
                                    getAvatarService().clear(contact);
                                    updateRosterUi();
                                }
                                updateConversationUi();
                            } else {
                                Conversation conversation = find(account, avatar.owner.toBareJid());
                                if (conversation != null && conversation.getMode() == Conversation.MODE_MULTI) {
                                    MucOptions.User user = conversation.getMucOptions().findUserByFullJid(avatar.owner);
                                    if (user != null) {
                                        if (user.setAvatar(avatar)) {
                                            getAvatarService().clear(user);
                                            updateConversationUi();
                                            updateMucRosterUi();
                                        }
                                    }
                                }
                            }
                        }
                    }
                }
            }
        });
    }

    public void checkForAvatar(Account account, final UiCallback<Avatar> callback) {
        IqPacket packet = this.mIqGenerator.retrieveAvatarMetaData(null);
        this.sendIqPacket(account, packet, new OnIqPacketReceived() {

            @Override
            public void onIqPacketReceived(Account account, IqPacket packet) {
                if (packet.getType() == IqPacket.TYPE.RESULT) {
                    Element pubsub = packet.findChild("pubsub", "http://jabber.org/protocol/pubsub");
                    if (pubsub != null) {
                        Element items = pubsub.findChild("items");
                        if (items != null) {
                            Avatar avatar = Avatar.parseMetadata(items);
                            if (avatar != null) {
                                avatar.owner = account.getJid().toBareJid();
                                if (fileBackend.isAvatarCached(avatar)) {
                                    if (account.setAvatar(avatar.getFilename())) {
                                        databaseBackend.updateAccount(account);
                                    }
                                    getAvatarService().clear(account);
                                    callback.success(avatar);
                                } else {
                                    fetchAvatarPep(account, avatar, callback);
                                }
                                return;
                            }
                        }
                    }
                }
                callback.error(0, null);
            }
        });
    }

    public void deleteContactOnServer(Contact contact) {
        contact.resetOption(Contact.Options.PREEMPTIVE_GRANT);
        contact.resetOption(Contact.Options.DIRTY_PUSH);
        contact.setOption(Contact.Options.DIRTY_DELETE);
        Account account = contact.getAccount();
        if (account.getStatus() == Account.State.ONLINE) {
            IqPacket iq = new IqPacket(IqPacket.TYPE.SET);
            Element item = iq.query(Namespace.ROSTER).addChild("item");
            item.setAttribute("jid", contact.getJid().toString());
            item.setAttribute("subscription", "remove");
            account.getXmppConnection().sendIqPacket(iq, mDefaultIqHandler);
        }
    }

    public void updateConversation(final Conversation conversation) {
        mDatabaseWriterExecutor.execute(new Runnable() {
            @Override
            public void run() {
                databaseBackend.updateConversation(conversation);
            }
        });
    }

    private void reconnectAccount(final Account account, final boolean force, final boolean interactive) {
        synchronized (account) {
            XmppConnection connection = account.getXmppConnection();
            if (connection == null) {
                connection = createConnection(account);
                account.setXmppConnection(connection);
            }
            boolean hasInternet = hasInternetConnection();
            if (account.isEnabled() && hasInternet) {
                if (!force) {
                    disconnect(account, false);
                }
                Thread thread = new Thread(connection);
                connection.setInteractive(interactive);
                connection.prepareNewConnection();
                connection.interrupt();
                thread.start();
                scheduleWakeUpCall(Config.CONNECT_DISCO_TIMEOUT, account.getUuid().hashCode());
            } else {
                disconnect(account, force || account.getTrueStatus().isError() || !hasInternet);
                account.getRoster().clearPresences();
                connection.resetEverything();
                final AxolotlService axolotlService = account.getAxolotlService();
                if (axolotlService != null) {
                    axolotlService.resetBrokenness();
                }
                if (!hasInternet) {
                    account.setStatus(Account.State.NO_INTERNET);
                }
            }
        }
    }

    public void reconnectAccountInBackground(final Account account) {
        new Thread(new Runnable() {
            @Override
            public void run() {
                reconnectAccount(account, false, true);
            }
        }).start();
    }

    public void invite(Conversation conversation, Jid contact) {
        Log.d(Config.LOGTAG, conversation.getAccount().getJid().toBareJid() + ": inviting " + contact + " to " + conversation.getJid().toBareJid());
        MessagePacket packet = mMessageGenerator.invite(conversation, contact);
        sendMessagePacket(conversation.getAccount(), packet);
    }

    public void directInvite(Conversation conversation, Jid jid) {
        MessagePacket packet = mMessageGenerator.directInvite(conversation, jid);
        sendMessagePacket(conversation.getAccount(), packet);
    }

    public void resetSendingToWaiting(Account account) {
        Log.d(Config.LOGTAG, account.getJid().toBareJid() + ": reset 'sending' messages to 'waiting'");
        for (Conversation conversation : getConversations()) {
            if (conversation.getAccount() == account) {
                conversation.findUnsentTextMessages(new Conversation.OnMessageFound() {

                    @Override
                    public void onMessageFound(Message message) {
                        markMessage(message, Message.STATUS_WAITING);
                    }
                });
            }
        }
    }

    public Message markMessage(final Account account, final Jid recipient, final String uuid, final int status) {
        return markMessage(account, recipient, uuid, status, null);
    }

    public Message markMessage(final Account account, final Jid recipient, final String uuid, final int status, String errorMessage) {
        if (uuid == null) {
            return null;
        }
        for (Conversation conversation : getConversations()) {
            if (conversation.getJid().toBareJid().equals(recipient) && conversation.getAccount() == account) {
                final Message message = conversation.findSentMessageWithUuidOrRemoteId(uuid);
                if (message != null) {
                    markMessage(message, status, errorMessage);
                }
                return message;
            }
        }
        return null;
    }

    public boolean markMessage(Conversation conversation, String uuid, int status, String serverMessageId) {
        if (uuid == null) {
            return false;
        } else {
            Message message = conversation.findSentMessageWithUuid(uuid);
            if (message != null) {
                if (message.getServerMsgId() == null) {
                    message.setServerMsgId(serverMessageId);
                }
                markMessage(message, status);
                return true;
            } else {
                return false;
            }
        }
    }

    public void markMessage(Message message, int status) {
        markMessage(message, status, null);
    }

    public void markMessage(Message message, int status, String errorMessage) {
        if (status == Message.STATUS_SEND_FAILED
                && (message.getStatus() == Message.STATUS_SEND_RECEIVED || message
                .getStatus() == Message.STATUS_SEND_DISPLAYED)) {
            return;
        }
        message.setErrorMessage(errorMessage);
        message.setStatus(status);
        databaseBackend.updateMessage(message);
        updateConversationUi();
    }

    public SharedPreferences getPreferences() {
        return PreferenceManager.getDefaultSharedPreferences(getApplicationContext());
    }

    public long getAutomaticMessageDeletionDate() {
        final long timeout = getLongPreference(SettingsActivity.AUTOMATIC_MESSAGE_DELETION, R.integer.automatic_message_deletion);
        return timeout == 0 ? timeout : (System.currentTimeMillis() - (timeout * 1000));
    }

    public long getLongPreference(String name, @IntegerRes int res) {
        long defaultValue = getResources().getInteger(res);
        try {
            return Long.parseLong(getPreferences().getString(name,String.valueOf(defaultValue)));
        } catch (NumberFormatException e) {
            return defaultValue;
        }
    }

    public boolean getBooleanPreference(String name, @BoolRes int res) {
        return getPreferences().getBoolean(name, getResources().getBoolean(res));
    }

    public boolean confirmMessages() {
        return getBooleanPreference("confirm_messages", R.bool.confirm_messages);
    }

    public boolean allowMessageCorrection() {
        return getBooleanPreference("allow_message_correction", R.bool.allow_message_correction);
    }

    public boolean sendChatStates() {
        return getBooleanPreference("chat_states", R.bool.chat_states);
    }

    private boolean respectAutojoin() {
        return getBooleanPreference("autojoin", R.bool.autojoin);
    }

    public boolean indicateReceived() {
        return getBooleanPreference("indicate_received", R.bool.indicate_received);
    }

    public boolean useTorToConnect() {
        return Config.FORCE_ORBOT || getBooleanPreference("use_tor", R.bool.use_tor);
    }

    public boolean showExtendedConnectionOptions() {
        return getBooleanPreference("show_connection_options", R.bool.show_connection_options);
    }

    public boolean warnUnecryptedChat() {
        return getBooleanPreference(SettingsActivity.WARN_UNENCRYPTED_CHAT, R.bool.warn_unencrypted_chat);
    }

    public boolean broadcastLastActivity() {
        return getBooleanPreference(SettingsActivity.BROADCAST_LAST_ACTIVITY, R.bool.last_activity);
    }

    public int unreadCount() {
        int count = 0;
        for (Conversation conversation : getConversations()) {
            count += conversation.unreadCount();
        }
        return count;
    }

    public void vibrate() {
        Log.d(Config.LOGTAG, "Notification: short vibrate");
        Vibrator vibrator = (Vibrator) getSystemService(VIBRATOR_SERVICE);
        vibrator.vibrate(100);
    }

    public void showErrorToastInUi(int resId) {
        if (mOnShowErrorToast != null) {
            mOnShowErrorToast.onShowErrorToast(resId);
        }
    }

    public void updateConversationUi() {
        if (mOnConversationUpdate != null) {
            mOnConversationUpdate.onConversationUpdate();
        }
    }

    public void updateAccountUi() {
        if (mOnAccountUpdate != null) {
            mOnAccountUpdate.onAccountUpdate();
        }
    }

    public void updateRosterUi() {
        if (mOnRosterUpdate != null) {
            mOnRosterUpdate.onRosterUpdate();
        }
    }

    public boolean displayCaptchaRequest(Account account, String id, Data data, Bitmap captcha) {
        if (mOnCaptchaRequested != null) {
            DisplayMetrics metrics = getApplicationContext().getResources().getDisplayMetrics();
            Bitmap scaled = Bitmap.createScaledBitmap(captcha, (int) (captcha.getWidth() * metrics.scaledDensity),
                    (int) (captcha.getHeight() * metrics.scaledDensity), false);

            mOnCaptchaRequested.onCaptchaRequested(account, id, data, scaled);
            return true;
        }
        return false;
    }

    public void updateBlocklistUi(final OnUpdateBlocklist.Status status) {
        if (mOnUpdateBlocklist != null) {
            mOnUpdateBlocklist.OnUpdateBlocklist(status);
        }
    }

    public void updateMucRosterUi() {
        if (mOnMucRosterUpdate != null) {
            mOnMucRosterUpdate.onMucRosterUpdate();
        }
    }

    public void keyStatusUpdated(AxolotlService.FetchStatus report) {
        if (mOnKeyStatusUpdated != null) {
            mOnKeyStatusUpdated.onKeyStatusUpdated(report);
        }
    }

    public Account findAccountByJid(final Jid accountJid) {
        for (Account account : this.accounts) {
            if (account.getJid().toBareJid().equals(accountJid.toBareJid())) {
                return account;
            }
        }
        return null;
    }

    public Conversation findConversationByUuid(String uuid) {
        for (Conversation conversation : getConversations()) {
            if (conversation.getUuid().equals(uuid)) {
                return conversation;
            }
        }
        return null;
    }

    public boolean markRead(final Conversation conversation) {
        return markRead(conversation, true);
    }

    public boolean markRead(final Conversation conversation, boolean clear) {
        if (clear) {
            mNotificationService.clear(conversation);
        }
        final List<Message> readMessages = conversation.markRead();
        if (readMessages.size() > 0) {
            Runnable runnable = new Runnable() {
                @Override
                public void run() {
                    for (Message message : readMessages) {
                        databaseBackend.updateMessage(message);
                    }
                }
            };
            mDatabaseWriterExecutor.execute(runnable);
            updateUnreadCountBadge();
            return true;
        } else {
            return false;
        }
    }

    public synchronized void updateUnreadCountBadge() {
        new Thread(new Runnable() {

            @Override
            public void run() {
                int count = unreadCount();
                if (unreadCount != count) {
                    Log.d(Config.LOGTAG, "update unread count to " + count);
                    if (count > 0) {
                        ShortcutBadger.applyCount(getApplicationContext(), count);
                    } else {
                        ShortcutBadger.removeCount(getApplicationContext());
                    }
                    unreadCount = count;
                }
            }
        }).start();
    }

    public void sendReadMarker(final Conversation conversation) {
        final Message markable = conversation.getLatestMarkableMessage();
        if (this.markRead(conversation)) {
            updateConversationUi();
        }
        if (confirmMessages() && markable != null && markable.trusted() && markable.getRemoteMsgId() != null && markable.getType() != Message.TYPE_PRIVATE) {
            Log.d(Config.LOGTAG, conversation.getAccount().getJid().toBareJid() + ": sending read marker to " + markable.getCounterpart().toString());
            Account account = conversation.getAccount();
            final Jid to = markable.getCounterpart();
            final boolean groupChat = conversation.getMode() == Conversation.MODE_MULTI;
            MessagePacket packet = mMessageGenerator.confirm(account, to, markable.getRemoteMsgId(), markable.getCounterpart(), groupChat);
            this.sendMessagePacket(conversation.getAccount(), packet);
        }
    }

    public SecureRandom getRNG() {
        return this.mRandom;
    }

    public MemorizingTrustManager getMemorizingTrustManager() {
        return this.mMemorizingTrustManager;
    }

    public void setMemorizingTrustManager(MemorizingTrustManager trustManager) {
        this.mMemorizingTrustManager = trustManager;
    }

    public void updateMemorizingTrustmanager() {
        final MemorizingTrustManager tm;
        final boolean dontTrustSystemCAs = getPreferences().getBoolean("dont_trust_system_cas", getResources().getBoolean(R.bool.dont_trust_system_cas));
        if (dontTrustSystemCAs) {
            tm = new MemorizingTrustManager(getApplicationContext(), null);
        } else {
            tm = new MemorizingTrustManager(getApplicationContext());
        }
        setMemorizingTrustManager(tm);
    }

    public PowerManager getPowerManager() {
        return this.pm;
    }

    public LruCache<String, Bitmap> getBitmapCache() {
        return this.mBitmapCache;
    }

    public void syncRosterToDisk(final Account account) {
        Runnable runnable = new Runnable() {

            @Override
            public void run() {
                databaseBackend.writeRoster(account.getRoster());
            }
        };
        mDatabaseWriterExecutor.execute(runnable);

    }

    public List<String> getKnownHosts() {
        final List<String> hosts = new ArrayList<>();
        for (final Account account : getAccounts()) {
            if (!hosts.contains(account.getServer().toString())) {
                hosts.add(account.getServer().toString());
            }
            for (final Contact contact : account.getRoster().getContacts()) {
                if (contact.showInRoster()) {
                    final String server = contact.getServer().toString();
                    if (server != null && !hosts.contains(server)) {
                        hosts.add(server);
                    }
                }
            }
        }
        if (Config.DOMAIN_LOCK != null && !hosts.contains(Config.DOMAIN_LOCK)) {
            hosts.add(Config.DOMAIN_LOCK);
        }
        if (Config.MAGIC_CREATE_DOMAIN != null && !hosts.contains(Config.MAGIC_CREATE_DOMAIN)) {
            hosts.add(Config.MAGIC_CREATE_DOMAIN);
        }
        return hosts;
    }

    public List<String> getKnownConferenceHosts() {
        final ArrayList<String> mucServers = new ArrayList<>();
        for (final Account account : accounts) {
            if (account.getXmppConnection() != null) {
                final String server = account.getXmppConnection().getMucServer();
                if (server != null && !mucServers.contains(server)) {
                    mucServers.add(server);
                }
                for (Bookmark bookmark : account.getBookmarks()) {
                    final Jid jid = bookmark.getJid();
                    final String s = jid == null ? null : jid.getDomainpart();
                    if (s != null && !mucServers.contains(s)) {
                        mucServers.add(s);
                    }
                }
            }
        }
        return mucServers;
    }

    public void sendMessagePacket(Account account, MessagePacket packet) {
        XmppConnection connection = account.getXmppConnection();
        if (connection != null) {
            connection.sendMessagePacket(packet);
        }
    }

    public void sendPresencePacket(Account account, PresencePacket packet) {
        XmppConnection connection = account.getXmppConnection();
        if (connection != null) {
            connection.sendPresencePacket(packet);
        }
    }

    public void sendCreateAccountWithCaptchaPacket(Account account, String id, Data data) {
        final XmppConnection connection = account.getXmppConnection();
        if (connection != null) {
            IqPacket request = mIqGenerator.generateCreateAccountWithCaptcha(account, id, data);
            connection.sendUnmodifiedIqPacket(request, connection.registrationResponseListener);
        }
    }

    public void sendIqPacket(final Account account, final IqPacket packet, final OnIqPacketReceived callback) {
        final XmppConnection connection = account.getXmppConnection();
        if (connection != null) {
            connection.sendIqPacket(packet, callback);
        }
    }

    public void sendPresence(final Account account) {
        sendPresence(account, checkListeners() && broadcastLastActivity());
    }

    public void sendPresence(final Account account, final boolean includeIdleTimestamp) {
        PresencePacket packet;
        if (manuallyChangePresence()) {
            packet = mPresenceGenerator.selfPresence(account, account.getPresenceStatus());
            String message = account.getPresenceStatusMessage();
            if (message != null && !message.isEmpty()) {
                packet.addChild(new Element("status").setContent(message));
            }
        } else {
            packet = mPresenceGenerator.selfPresence(account, getTargetPresence());
        }
        if (mLastActivity > 0 && includeIdleTimestamp) {
            long since = Math.min(mLastActivity, System.currentTimeMillis()); //don't send future dates
            packet.addChild("idle", Namespace.IDLE).setAttribute("since", AbstractGenerator.getTimestamp(since));
        }
        sendPresencePacket(account, packet);
    }

    private void deactivateGracePeriod() {
        for (Account account : getAccounts()) {
            account.deactivateGracePeriod();
        }
    }

    public void refreshAllPresences() {
        boolean includeIdleTimestamp = checkListeners() && broadcastLastActivity();
        for (Account account : getAccounts()) {
            if (account.isEnabled()) {
                sendPresence(account, includeIdleTimestamp);
            }
        }
    }

    private void refreshAllGcmTokens() {
        for (Account account : getAccounts()) {
            if (account.isOnlineAndConnected() && mPushManagementService.available(account)) {
                mPushManagementService.registerPushTokenOnServer(account);
            }
        }
    }

    private void sendOfflinePresence(final Account account) {
        Log.d(Config.LOGTAG, account.getJid().toBareJid() + ": sending offline presence");
        sendPresencePacket(account, mPresenceGenerator.sendOfflinePresence(account));
    }

    public MessageGenerator getMessageGenerator() {
        return this.mMessageGenerator;
    }

    public PresenceGenerator getPresenceGenerator() {
        return this.mPresenceGenerator;
    }

    public IqGenerator getIqGenerator() {
        return this.mIqGenerator;
    }

    public IqParser getIqParser() {
        return this.mIqParser;
    }

    public JingleConnectionManager getJingleConnectionManager() {
        return this.mJingleConnectionManager;
    }

    public MessageArchiveService getMessageArchiveService() {
        return this.mMessageArchiveService;
    }

    public List<Contact> findContacts(Jid jid, String accountJid) {
        ArrayList<Contact> contacts = new ArrayList<>();
        for (Account account : getAccounts()) {
            if ((account.isEnabled() || accountJid != null)
                    && (accountJid == null || accountJid.equals(account.getJid().toBareJid().toString()))) {
                Contact contact = account.getRoster().getContactFromRoster(jid);
                if (contact != null) {
                    contacts.add(contact);
                }
            }
        }
        return contacts;
    }

    public Conversation findFirstMuc(Jid jid) {
        for (Conversation conversation : getConversations()) {
            if (conversation.getAccount().isEnabled() && conversation.getJid().toBareJid().equals(jid.toBareJid()) && conversation.getMode() == Conversation.MODE_MULTI) {
                return conversation;
            }
        }
        return null;
    }

    public NotificationService getNotificationService() {
        return this.mNotificationService;
    }

    public HttpConnectionManager getHttpConnectionManager() {
        return this.mHttpConnectionManager;
    }

    public void resendFailedMessages(final Message message) {
        final Collection<Message> messages = new ArrayList<>();
        Message current = message;
        while (current.getStatus() == Message.STATUS_SEND_FAILED) {
            messages.add(current);
            if (current.mergeable(current.next())) {
                current = current.next();
            } else {
                break;
            }
        }
        for (final Message msg : messages) {
            msg.setTime(System.currentTimeMillis());
            markMessage(msg, Message.STATUS_WAITING);
            this.resendMessage(msg, false);
        }
    }

    public void clearConversationHistory(final Conversation conversation) {
        final long clearDate;
        final String reference;
        if (conversation.countMessages() > 0) {
            Message latestMessage = conversation.getLatestMessage();
            clearDate = latestMessage.getTimeSent() + 1000;
            reference = latestMessage.getServerMsgId();
        } else {
            clearDate = System.currentTimeMillis();
            reference = null;
        }
        conversation.clearMessages();
        conversation.setHasMessagesLeftOnServer(false); //avoid messages getting loaded through mam
        conversation.setLastClearHistory(clearDate, reference);
        Runnable runnable = new Runnable() {
            @Override
            public void run() {
                databaseBackend.deleteMessagesInConversation(conversation);
                databaseBackend.updateConversation(conversation);

            }
        };
        mDatabaseWriterExecutor.execute(runnable);
    }

    public boolean sendBlockRequest(final Blockable blockable, boolean reportSpam) {
        if (blockable != null && blockable.getBlockedJid() != null) {
            final Jid jid = blockable.getBlockedJid();
            this.sendIqPacket(blockable.getAccount(), getIqGenerator().generateSetBlockRequest(jid, reportSpam), new OnIqPacketReceived() {

                @Override
                public void onIqPacketReceived(final Account account, final IqPacket packet) {
                    if (packet.getType() == IqPacket.TYPE.RESULT) {
                        account.getBlocklist().add(jid);
                        updateBlocklistUi(OnUpdateBlocklist.Status.BLOCKED);
                    }
                }
            });
            if (removeBlockedConversations(blockable.getAccount(), jid)) {
                updateConversationUi();
                return true;
            } else {
                return false;
            }
        } else {
            return false;
        }
    }

    public boolean removeBlockedConversations(final Account account, final Jid blockedJid) {
        boolean removed = false;
        synchronized (this.conversations) {
            boolean domainJid = blockedJid.isDomainJid();
            for (Conversation conversation : this.conversations) {
                boolean jidMatches = (domainJid && blockedJid.getDomainpart().equals(conversation.getJid().getDomainpart()))
                        || blockedJid.equals(conversation.getJid().toBareJid());
                if (conversation.getAccount() == account
                        && conversation.getMode() == Conversation.MODE_SINGLE
                        && jidMatches) {
                    this.conversations.remove(conversation);
                    markRead(conversation);
                    conversation.setStatus(Conversation.STATUS_ARCHIVED);
                    Log.d(Config.LOGTAG, account.getJid().toBareJid() + ": archiving conversation " + conversation.getJid().toBareJid() + " because jid was blocked");
                    updateConversation(conversation);
                    removed = true;
                }
            }
        }
        return removed;
    }

    public void sendUnblockRequest(final Blockable blockable) {
        if (blockable != null && blockable.getJid() != null) {
            final Jid jid = blockable.getBlockedJid();
            this.sendIqPacket(blockable.getAccount(), getIqGenerator().generateSetUnblockRequest(jid), new OnIqPacketReceived() {
                @Override
                public void onIqPacketReceived(final Account account, final IqPacket packet) {
                    if (packet.getType() == IqPacket.TYPE.RESULT) {
                        account.getBlocklist().remove(jid);
                        updateBlocklistUi(OnUpdateBlocklist.Status.UNBLOCKED);
                    }
                }
            });
        }
    }

    public void publishDisplayName(Account account) {
        String displayName = account.getDisplayName();
        if (displayName != null && !displayName.isEmpty()) {
            IqPacket publish = mIqGenerator.publishNick(displayName);
            sendIqPacket(account, publish, new OnIqPacketReceived() {
                @Override
                public void onIqPacketReceived(Account account, IqPacket packet) {
                    if (packet.getType() == IqPacket.TYPE.ERROR) {
                        Log.d(Config.LOGTAG, account.getJid().toBareJid() + ": could not publish nick");
                    }
                }
            });
        }
    }

    public ServiceDiscoveryResult getCachedServiceDiscoveryResult(Pair<String, String> key) {
        ServiceDiscoveryResult result = discoCache.get(key);
        if (result != null) {
            return result;
        } else {
            result = databaseBackend.findDiscoveryResult(key.first, key.second);
            if (result != null) {
                discoCache.put(key, result);
            }
            return result;
        }
    }

    public void fetchCaps(Account account, final Jid jid, final Presence presence) {
        final Pair<String, String> key = new Pair<>(presence.getHash(), presence.getVer());
        ServiceDiscoveryResult disco = getCachedServiceDiscoveryResult(key);
        if (disco != null) {
            presence.setServiceDiscoveryResult(disco);
        } else {
            if (!account.inProgressDiscoFetches.contains(key)) {
                account.inProgressDiscoFetches.add(key);
                IqPacket request = new IqPacket(IqPacket.TYPE.GET);
                request.setTo(jid);
                request.query("http://jabber.org/protocol/disco#info");
                Log.d(Config.LOGTAG, account.getJid().toBareJid() + ": making disco request for " + key.second + " to " + jid);
                sendIqPacket(account, request, new OnIqPacketReceived() {
                    @Override
                    public void onIqPacketReceived(Account account, IqPacket discoPacket) {
                        if (discoPacket.getType() == IqPacket.TYPE.RESULT) {
                            ServiceDiscoveryResult disco = new ServiceDiscoveryResult(discoPacket);
                            if (presence.getVer().equals(disco.getVer())) {
                                databaseBackend.insertDiscoveryResult(disco);
                                injectServiceDiscorveryResult(account.getRoster(), presence.getHash(), presence.getVer(), disco);
                            } else {
                                Log.d(Config.LOGTAG, account.getJid().toBareJid() + ": mismatch in caps for contact " + jid + " " + presence.getVer() + " vs " + disco.getVer());
                            }
                        }
                        account.inProgressDiscoFetches.remove(key);
                    }
                });
            }
        }
    }

    private void injectServiceDiscorveryResult(Roster roster, String hash, String ver, ServiceDiscoveryResult disco) {
        for (Contact contact : roster.getContacts()) {
            for (Presence presence : contact.getPresences().getPresences().values()) {
                if (hash.equals(presence.getHash()) && ver.equals(presence.getVer())) {
                    presence.setServiceDiscoveryResult(disco);
                }
            }
        }
    }

    public void fetchMamPreferences(Account account, final OnMamPreferencesFetched callback) {
        final boolean legacy = account.getXmppConnection().getFeatures().mamLegacy();
        IqPacket request = new IqPacket(IqPacket.TYPE.GET);
        request.addChild("prefs",legacy ? Namespace.MAM_LEGACY : Namespace.MAM);
        sendIqPacket(account, request, new OnIqPacketReceived() {
            @Override
            public void onIqPacketReceived(Account account, IqPacket packet) {
                Element prefs = packet.findChild("prefs",legacy ? Namespace.MAM_LEGACY : Namespace.MAM);
                if (packet.getType() == IqPacket.TYPE.RESULT && prefs != null) {
                    callback.onPreferencesFetched(prefs);
                } else {
                    callback.onPreferencesFetchFailed();
                }
            }
        });
    }

    public PushManagementService getPushManagementService() {
        return mPushManagementService;
    }

    public Account getPendingAccount() {
        Account pending = null;
        for (Account account : getAccounts()) {
            if (account.isOptionSet(Account.OPTION_REGISTER)) {
                pending = account;
            } else {
                return null;
            }
        }
        return pending;
    }

    public void changeStatus(Account account, Presence.Status status, String statusMessage, boolean send) {
        if (!statusMessage.isEmpty()) {
            databaseBackend.insertPresenceTemplate(new PresenceTemplate(status, statusMessage));
        }
        changeStatusReal(account, status, statusMessage, send);
    }

    private void changeStatusReal(Account account, Presence.Status status, String statusMessage, boolean send) {
        account.setPresenceStatus(status);
        account.setPresenceStatusMessage(statusMessage);
        databaseBackend.updateAccount(account);
        if (account.isEnabled() && send) {
            sendPresence(account);
        }
    }

    public void changeStatus(Presence.Status status, String statusMessage) {
        if (!statusMessage.isEmpty()) {
            databaseBackend.insertPresenceTemplate(new PresenceTemplate(status, statusMessage));
        }
        for (Account account : getAccounts()) {
            changeStatusReal(account, status, statusMessage, true);
        }
    }

    public List<PresenceTemplate> getPresenceTemplates(Account account) {
        List<PresenceTemplate> templates = databaseBackend.getPresenceTemplates();
        for (PresenceTemplate template : account.getSelfContact().getPresences().asTemplates()) {
            if (!templates.contains(template)) {
                templates.add(0, template);
            }
        }
        return templates;
    }

    public void saveConversationAsBookmark(Conversation conversation, String name) {
        Account account = conversation.getAccount();
        Bookmark bookmark = new Bookmark(account, conversation.getJid().toBareJid());
        if (!conversation.getJid().isBareJid()) {
            bookmark.setNick(conversation.getJid().getResourcepart());
        }
        if (name != null && !name.trim().isEmpty()) {
            bookmark.setBookmarkName(name.trim());
        }
        bookmark.setAutojoin(getPreferences().getBoolean("autojoin", getResources().getBoolean(R.bool.autojoin)));
        account.getBookmarks().add(bookmark);
        pushBookmarks(account);
        conversation.setBookmark(bookmark);
    }

    public boolean verifyFingerprints(Contact contact, List<XmppUri.Fingerprint> fingerprints) {
        boolean needsRosterWrite = false;
        boolean performedVerification = false;
        final AxolotlService axolotlService = contact.getAccount().getAxolotlService();
        for (XmppUri.Fingerprint fp : fingerprints) {
            if (fp.type == XmppUri.FingerprintType.OTR) {
                performedVerification |= contact.addOtrFingerprint(fp.fingerprint);
                needsRosterWrite |= performedVerification;
            } else if (fp.type == XmppUri.FingerprintType.OMEMO) {
                String fingerprint = "05" + fp.fingerprint.replaceAll("\\s", "");
                FingerprintStatus fingerprintStatus = axolotlService.getFingerprintTrust(fingerprint);
                if (fingerprintStatus != null) {
                    if (!fingerprintStatus.isVerified()) {
                        performedVerification = true;
                        axolotlService.setFingerprintTrust(fingerprint, fingerprintStatus.toVerified());
                    }
                } else {
                    axolotlService.preVerifyFingerprint(contact, fingerprint);
                }
            }
        }
        if (needsRosterWrite) {
            syncRosterToDisk(contact.getAccount());
        }
        return performedVerification;
    }

    public boolean verifyFingerprints(Account account, List<XmppUri.Fingerprint> fingerprints) {
        final AxolotlService axolotlService = account.getAxolotlService();
        boolean verifiedSomething = false;
        for (XmppUri.Fingerprint fp : fingerprints) {
            if (fp.type == XmppUri.FingerprintType.OMEMO) {
                String fingerprint = "05" + fp.fingerprint.replaceAll("\\s", "");
                Log.d(Config.LOGTAG, "trying to verify own fp=" + fingerprint);
                FingerprintStatus fingerprintStatus = axolotlService.getFingerprintTrust(fingerprint);
                if (fingerprintStatus != null) {
                    if (!fingerprintStatus.isVerified()) {
                        axolotlService.setFingerprintTrust(fingerprint, fingerprintStatus.toVerified());
                        verifiedSomething = true;
                    }
                } else {
                    axolotlService.preVerifyFingerprint(account, fingerprint);
                    verifiedSomething = true;
                }
            }
        }
        return verifiedSomething;
    }

    public boolean blindTrustBeforeVerification() {
        return getPreferences().getBoolean(SettingsActivity.BLIND_TRUST_BEFORE_VERIFICATION, getResources().getBoolean(R.bool.btbv));
    }

    public boolean showForegroundService() {
        return getPreferences().getBoolean(SettingsActivity.SHOW_FOREGROUND_SERVICE, getResources().getBoolean(R.bool.show_foreground_service));
    }

    public void pushMamPreferences(Account account, Element prefs) {
        IqPacket set = new IqPacket(IqPacket.TYPE.SET);
        set.addChild(prefs);
        sendIqPacket(account, set, null);
    }

    public void ScheduleAutomaticExport() {
        //start export log service every day at given time
        if (Config.ExportLogs) {
            if (Config.ExportLogs_Hour >= 0 && Config.ExportLogs_Hour <= 23 && Config.ExportLogs_Minute >= 0 && Config.ExportLogs_Minute <= 59) {
                Calendar now = Calendar.getInstance();
                now.setTimeInMillis(System.currentTimeMillis());
                Calendar timetoexport = Calendar.getInstance();
                timetoexport.setTimeInMillis(System.currentTimeMillis());
                Intent intent = new Intent(this, AlarmReceiver.class);
                intent.setAction("exportlogs");
                Log.d(Config.LOGTAG, "Schedule automatic export logs at " + Config.ExportLogs_Hour + ":" + Config.ExportLogs_Minute);
                timetoexport.set(Calendar.HOUR_OF_DAY, Config.ExportLogs_Hour);
                timetoexport.set(Calendar.MINUTE, Config.ExportLogs_Minute);
                if (timetoexport.before(now)) {
                    SimpleDateFormat newDate = new SimpleDateFormat("yyyy-MM-dd HH:mm", Locale.US);
                    timetoexport.add(Calendar.DAY_OF_YEAR, 1); //DATE or DAY_OF_MONTH
                    Log.d(Config.LOGTAG, "Schedule automatic export logs, for today, the export time is in the past, scheduling first export run for the next day ("+ newDate.format(timetoexport.getTimeInMillis()) +").");
                }
                final PendingIntent ScheduleExportIntent = PendingIntent.getBroadcast(this, AlarmReceiver.SCHEDULE_ALARM_REQUEST_CODE, intent, PendingIntent.FLAG_UPDATE_CURRENT);
                ((AlarmManager) getSystemService(ALARM_SERVICE)).setInexactRepeating(AlarmManager.RTC_WAKEUP, timetoexport.getTimeInMillis(), AlarmManager.INTERVAL_DAY, ScheduleExportIntent);
            }
        }
    }

    public void CancelAutomaticExport(boolean force) {
        if (!Config.ExportLogs || force) {
            Log.d(Config.LOGTAG, "Cancel scheduled automatic export");
            Intent intent = new Intent(this, AlarmReceiver.class);
            final PendingIntent ScheduleExportIntent = PendingIntent.getBroadcast(this, AlarmReceiver.SCHEDULE_ALARM_REQUEST_CODE, intent, PendingIntent.FLAG_UPDATE_CURRENT);
            ((AlarmManager) this.getSystemService(ALARM_SERVICE)).cancel(ScheduleExportIntent);
        }
    }

    public ShortcutService getShortcutService() {
        return mShortcutService;
    }



    public interface OnMamPreferencesFetched {
        void onPreferencesFetched(Element prefs);

        void onPreferencesFetchFailed();
    }

    public interface OnAccountCreated {
        void onAccountCreated(Account account);

        void informUser(int r);
    }

    public interface OnMoreMessagesLoaded {
        void onMoreMessagesLoaded(int count, Conversation conversation);

        void informUser(int r);
    }

    public interface OnAccountPasswordChanged {
        void onPasswordChangeSucceeded();

        void onPasswordChangeFailed();
    }

    public interface OnAffiliationChanged {
        void onAffiliationChangedSuccessful(Jid jid);

        void onAffiliationChangeFailed(Jid jid, int resId);
    }

    public interface OnRoleChanged {
        void onRoleChangedSuccessful(String nick);

        void onRoleChangeFailed(String nick, int resid);
    }

    public interface OnConversationUpdate {
        void onConversationUpdate();
    }

    public interface OnAccountUpdate {
        void onAccountUpdate();
    }

    public interface OnCaptchaRequested {
        void onCaptchaRequested(Account account,
                                String id,
                                Data data,
                                Bitmap captcha);
    }

    public interface OnRosterUpdate {
        void onRosterUpdate();
    }

    public interface OnMucRosterUpdate {
        void onMucRosterUpdate();
    }

    public interface OnConferenceConfigurationFetched {
        void onConferenceConfigurationFetched(Conversation conversation);

        void onFetchFailed(Conversation conversation, Element error);
    }

    public interface OnConferenceJoined {
        void onConferenceJoined(Conversation conversation);
    }

    public interface OnConfigurationPushed {
        void onPushSucceeded();

        void onPushFailed();
    }

    public interface OnShowErrorToast {
        void onShowErrorToast(int resId);
    }

    public class XmppConnectionBinder extends Binder {
        public XmppConnectionService getService() {
            return XmppConnectionService.this;
        }
    }
}