package de.pixart.messenger.ui;

import android.app.ActionBar;
import android.app.AlertDialog;
import android.app.PendingIntent;
import android.content.Context;
import android.content.DialogInterface;
import android.content.IntentSender.SendIntentException;
import android.os.Bundle;
import android.view.ContextMenu;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.ImageButton;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.RelativeLayout;
import android.widget.TextView;
import android.widget.Toast;

import org.openintents.openpgp.util.OpenPgpUtils;

import java.util.ArrayList;
import java.util.Collections;
import java.util.concurrent.atomic.AtomicInteger;

import de.pixart.messenger.Config;
import de.pixart.messenger.R;
import de.pixart.messenger.crypto.PgpEngine;
import de.pixart.messenger.entities.Account;
import de.pixart.messenger.entities.Bookmark;
import de.pixart.messenger.entities.Contact;
import de.pixart.messenger.entities.Conversation;
import de.pixart.messenger.entities.MucOptions;
import de.pixart.messenger.entities.MucOptions.User;
import de.pixart.messenger.services.XmppConnectionService;
import de.pixart.messenger.services.XmppConnectionService.OnConversationUpdate;
import de.pixart.messenger.services.XmppConnectionService.OnMucRosterUpdate;
import de.pixart.messenger.xmpp.jid.Jid;

public class ConferenceDetailsActivity extends XmppActivity implements OnConversationUpdate, OnMucRosterUpdate, XmppConnectionService.OnAffiliationChanged, XmppConnectionService.OnRoleChanged, XmppConnectionService.OnConfigurationPushed {
    public static final String ACTION_VIEW_MUC = "view_muc";
    private static final float INACTIVE_ALPHA = 0.4684f; //compromise between dark and light theme
    private Conversation mConversation;
    private OnClickListener inviteListener = new OnClickListener() {

        @Override
        public void onClick(View v) {
            inviteToConversation(mConversation);
        }
    };
    private TextView ConferenceName;
    private TextView mYourNick;
    private ImageView mYourPhoto;
    private TextView mRoleAffiliaton;
    private TextView mFullJid;
    private TextView mAccountJid;
    private LinearLayout membersView;
    private LinearLayout mMoreDetails;
    private RelativeLayout mMucSettings;
    private TextView mConferenceType;
    private LinearLayout mConferenceInfoTable;
    private TextView mConferenceInfoMam;
    private TextView mNotifyStatusText;
    private ImageButton mChangeConferenceSettingsButton;
    private ImageButton mNotifyStatusButton;
    private Button mInviteButton;
    private String uuid = null;
    private User mSelectedUser = null;

    private boolean mAdvancedMode = false;

    private UiCallback<Conversation> renameCallback = new UiCallback<Conversation>() {
        @Override
        public void success(Conversation object) {
            runOnUiThread(new Runnable() {
                @Override
                public void run() {
                    Toast.makeText(ConferenceDetailsActivity.this, getString(R.string.your_nick_has_been_changed), Toast.LENGTH_SHORT).show();
                    updateView();
                }
            });

        }

        @Override
        public void error(final int errorCode, Conversation object) {
            runOnUiThread(new Runnable() {
                @Override
                public void run() {
                    Toast.makeText(ConferenceDetailsActivity.this, getString(errorCode), Toast.LENGTH_SHORT).show();
                }
            });
        }

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

        }
    };

    private OnClickListener mNotifyStatusClickListener = new OnClickListener() {
        @Override
        public void onClick(View v) {
            AlertDialog.Builder builder = new AlertDialog.Builder(ConferenceDetailsActivity.this);
            builder.setTitle(R.string.pref_notification_settings);
            String[] choices = {
                    getString(R.string.notify_on_all_messages),
                    getString(R.string.notify_only_when_highlighted),
                    getString(R.string.notify_never)
            };
            final AtomicInteger choice;
            if (mConversation.getLongAttribute(Conversation.ATTRIBUTE_MUTED_TILL, 0) == Long.MAX_VALUE) {
                choice = new AtomicInteger(2);
            } else {
                choice = new AtomicInteger(mConversation.alwaysNotify() ? 0 : 1);
            }
            builder.setSingleChoiceItems(choices, choice.get(), new DialogInterface.OnClickListener() {
                @Override
                public void onClick(DialogInterface dialog, int which) {
                    choice.set(which);
                }
            });
            builder.setNegativeButton(R.string.cancel, null);
            builder.setPositiveButton(R.string.ok, new DialogInterface.OnClickListener() {
                @Override
                public void onClick(DialogInterface dialog, int which) {
                    if (choice.get() == 2) {
                        AlertDialog.Builder builder = new AlertDialog.Builder(ConferenceDetailsActivity.this);
                        builder.setTitle(R.string.disable_notifications);
                        final int[] durations = getResources().getIntArray(R.array.mute_options_durations);
                        builder.setItems(R.array.mute_options_descriptions,
                                new DialogInterface.OnClickListener() {

                                    @Override
                                    public void onClick(final DialogInterface dialog, final int which) {
                                        final long till;
                                        if (durations[which] == -1) {
                                            till = Long.MAX_VALUE;
                                        } else {
                                            till = System.currentTimeMillis() + (durations[which] * 1000);
                                        }
                                        mConversation.setMutedTill(till);
                                        xmppConnectionService.updateConversation(mConversation);
                                        updateView();
                                    }
                                });
                        builder.create().show();
                    } else {
                        mConversation.setMutedTill(0);
                        mConversation.setAttribute(Conversation.ATTRIBUTE_ALWAYS_NOTIFY, String.valueOf(choice.get() == 0));
                    }
                    xmppConnectionService.updateConversation(mConversation);
                    updateView();
                }
            });
            builder.create().show();
        }
    };

    private OnClickListener mChangeConferenceSettings = new OnClickListener() {
        @Override
        public void onClick(View v) {
            final MucOptions mucOptions = mConversation.getMucOptions();
            AlertDialog.Builder builder = new AlertDialog.Builder(ConferenceDetailsActivity.this);
            builder.setTitle(R.string.conference_options);
            final String[] options;
            final boolean[] values;
            if (mAdvancedMode) {
                options = new String[]{
                        getString(R.string.members_only),
                        getString(R.string.moderated),
                        getString(R.string.non_anonymous)
                };
                values = new boolean[]{
                        mucOptions.membersOnly(),
                        mucOptions.moderated(),
                        mucOptions.nonanonymous()
                };
            } else {
                options = new String[]{
                        getString(R.string.members_only),
                        getString(R.string.non_anonymous)
                };
                values = new boolean[]{
                        mucOptions.membersOnly(),
                        mucOptions.nonanonymous()
                };
            }
            builder.setMultiChoiceItems(options, values, new DialogInterface.OnMultiChoiceClickListener() {
                @Override
                public void onClick(DialogInterface dialog, int which, boolean isChecked) {
                    values[which] = isChecked;
                }
            });
            builder.setNegativeButton(R.string.cancel, null);
            builder.setPositiveButton(R.string.confirm, new DialogInterface.OnClickListener() {
                @Override
                public void onClick(DialogInterface dialog, int which) {
                    if (!mucOptions.membersOnly() && values[0]) {
                        xmppConnectionService.changeAffiliationsInConference(mConversation,
                                MucOptions.Affiliation.NONE,
                                MucOptions.Affiliation.MEMBER);
                    }
                    Bundle options = new Bundle();
                    options.putString("muc#roomconfig_membersonly", values[0] ? "1" : "0");
                    if (values.length == 2) {
                        options.putString("muc#roomconfig_whois", values[1] ? "anyone" : "moderators");
                    } else if (values.length == 3) {
                        options.putString("muc#roomconfig_moderatedroom", values[1] ? "1" : "0");
                        options.putString("muc#roomconfig_whois", values[2] ? "anyone" : "moderators");
                    }
                    options.putString("muc#roomconfig_persistentroom", "1");
                    xmppConnectionService.pushConferenceConfiguration(mConversation,
                            options,
                            ConferenceDetailsActivity.this);
                }
            });
            builder.create().show();
        }
    };
    private OnValueEdited onSubjectEdited = new OnValueEdited() {

        @Override
        public String onValueEdited(String value) {
            xmppConnectionService.pushSubjectToConference(mConversation, value);
            return null;
        }
    };

    @Override
    public void onConversationUpdate() {
        refreshUi();
    }

    @Override
    public void onMucRosterUpdate() {
        refreshUi();
    }

    @Override
    protected void refreshUiReal() {
        updateView();
    }

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_muc_details);
        ConferenceName = findViewById(R.id.conference_name);
        mYourNick = findViewById(R.id.muc_your_nick);
        mYourPhoto = findViewById(R.id.your_photo);
        ImageButton mEditNickButton = findViewById(R.id.edit_nick_button);
        mFullJid = findViewById(R.id.muc_jabberid);
        membersView = findViewById(R.id.muc_members);
        mAccountJid = findViewById(R.id.details_account);
        mMucSettings = findViewById(R.id.muc_settings);
        mMoreDetails = findViewById(R.id.muc_more_details);
        mChangeConferenceSettingsButton = findViewById(R.id.change_conference_button);
        mChangeConferenceSettingsButton.setOnClickListener(this.mChangeConferenceSettings);
        mInviteButton = findViewById(R.id.invite);
        mInviteButton.setVisibility(View.GONE);
        mInviteButton.setOnClickListener(inviteListener);
        mConferenceType = findViewById(R.id.muc_conference_type);
        if (getActionBar() != null) {
            getActionBar().setHomeButtonEnabled(true);
            getActionBar().setDisplayHomeAsUpEnabled(true);
        }
        mEditNickButton.setOnClickListener(new OnClickListener() {

            @Override
            public void onClick(View v) {
                quickEdit(mConversation.getMucOptions().getActualNick(),
                        0,
                        new OnValueEdited() {

                            @Override
                            public String onValueEdited(String value) {
                                if (xmppConnectionService.renameInMuc(mConversation, value, renameCallback)) {
                                    return null;
                                } else {
                                    return getString(R.string.invalid_username);
                                }
                            }
                        });
            }
        });
        this.mAdvancedMode = getPreferences().getBoolean("advanced_muc_mode", false);
        this.mConferenceInfoTable = findViewById(R.id.muc_info_more);
        this.mConferenceInfoTable.setVisibility(this.mAdvancedMode ? View.VISIBLE : View.GONE);
        this.mConferenceInfoMam = findViewById(R.id.muc_info_mam);
        this.mNotifyStatusButton = findViewById(R.id.notification_status_button);
        this.mNotifyStatusButton.setOnClickListener(this.mNotifyStatusClickListener);
        this.mNotifyStatusText = findViewById(R.id.notification_status_text);
    }

    @Override
    protected void onStart() {
        super.onStart();
        final int theme = findTheme();
        if (this.mTheme != theme) {
            recreate();
        }
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem menuItem) {
        switch (menuItem.getItemId()) {
            case android.R.id.home:
                finish();
                break;
            case R.id.action_edit_subject:
                if (mConversation != null) {
                    quickEdit(mConversation.getMucOptions().getSubject(),
                            R.string.edit_subject_hint,
                            this.onSubjectEdited);
                }
                break;
            case R.id.action_share_http:
                shareLink(true);
                break;
            case R.id.action_share_uri:
                shareLink(false);
                break;
            case R.id.action_save_as_bookmark:
                saveAsBookmark();
                break;
            case R.id.action_delete_bookmark:
                deleteBookmark();
                break;
            case R.id.action_advanced_mode:
                this.mAdvancedMode = !menuItem.isChecked();
                menuItem.setChecked(this.mAdvancedMode);
                getPreferences().edit().putBoolean("advanced_muc_mode", mAdvancedMode).apply();
                final boolean online = mConversation != null && mConversation.getMucOptions().online();
                mConferenceInfoTable.setVisibility(this.mAdvancedMode && online ? View.VISIBLE : View.GONE);
                invalidateOptionsMenu();
                updateView();
                break;
        }
        return super.onOptionsItemSelected(menuItem);
    }

    @Override
    protected String getShareableUri(boolean http) {
        if (mConversation != null) {
            if (http) {
                return Config.inviteMUCURL + mConversation.getJid().toBareJid();
            } else {
                return "xmpp:" + mConversation.getJid().toBareJid() + "?join";
            }
        } else {
            return null;
        }
    }

    @Override
    public boolean onPrepareOptionsMenu(Menu menu) {
        MenuItem menuItemSaveBookmark = menu.findItem(R.id.action_save_as_bookmark);
        MenuItem menuItemDeleteBookmark = menu.findItem(R.id.action_delete_bookmark);
        MenuItem menuItemAdvancedMode = menu.findItem(R.id.action_advanced_mode);
        MenuItem menuItemChangeSubject = menu.findItem(R.id.action_edit_subject);
        menuItemAdvancedMode.setChecked(mAdvancedMode);
        if (mConversation == null) {
            return true;
        }
        Account account = mConversation.getAccount();
        if (account.hasBookmarkFor(mConversation.getJid().toBareJid())) {
            menuItemSaveBookmark.setVisible(false);
            menuItemDeleteBookmark.setVisible(true);
        } else {
            menuItemDeleteBookmark.setVisible(false);
            menuItemSaveBookmark.setVisible(true);
        }
        menuItemChangeSubject.setVisible(mConversation.getMucOptions().canChangeSubject());
        return true;
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        getMenuInflater().inflate(R.menu.muc_details, menu);
        return super.onCreateOptionsMenu(menu);
    }

    @Override
    public void onCreateContextMenu(ContextMenu menu, View v, ContextMenu.ContextMenuInfo menuInfo) {
        Object tag = v.getTag();
        if (tag instanceof User) {
            getMenuInflater().inflate(R.menu.muc_details_context, menu);
            final User user = (User) tag;
            final User self = mConversation.getMucOptions().getSelf();
            this.mSelectedUser = user;
            String name;
            final Contact contact = user.getContact();
            if (contact != null && contact.showInRoster()) {
                name = contact.getDisplayName();
            } else if (user.getRealJid() != null){
                name = user.getRealJid().toBareJid().toString();
            } else {
                name = user.getName();
            }
            menu.setHeaderTitle(name);
            if (user.getRealJid() != null) {
                MenuItem highlightInMuc = menu.findItem(R.id.highlight_in_muc);
                MenuItem startConversation = menu.findItem(R.id.start_conversation);
                MenuItem giveMembership = menu.findItem(R.id.give_membership);
                MenuItem removeMembership = menu.findItem(R.id.remove_membership);
                MenuItem giveAdminPrivileges = menu.findItem(R.id.give_admin_privileges);
                MenuItem removeAdminPrivileges = menu.findItem(R.id.remove_admin_privileges);
                MenuItem removeFromRoom = menu.findItem(R.id.remove_from_room);
                MenuItem banFromConference = menu.findItem(R.id.ban_from_conference);
                MenuItem invite = menu.findItem(R.id.invite);
                highlightInMuc.setVisible(true);
                startConversation.setVisible(true);
                if (user.getRole() == MucOptions.Role.NONE) {
                    invite.setVisible(true);
                }
                if (self.getAffiliation().ranks(MucOptions.Affiliation.ADMIN) &&
                        self.getAffiliation().outranks(user.getAffiliation())) {
                    if (mAdvancedMode) {
                        if (user.getAffiliation() == MucOptions.Affiliation.NONE) {
                            giveMembership.setVisible(true);
                        } else {
                            removeMembership.setVisible(true);
                        }
                        banFromConference.setVisible(true);
                    } else {
                        removeFromRoom.setVisible(true);
                    }
                    if (user.getAffiliation() != MucOptions.Affiliation.ADMIN) {
                        giveAdminPrivileges.setVisible(true);
                    } else {
                        removeAdminPrivileges.setVisible(true);
                    }
                }
            } else {
                MenuItem sendPrivateMessage = menu.findItem(R.id.send_private_message);
                sendPrivateMessage.setVisible(user.getRole().ranks(MucOptions.Role.PARTICIPANT));
            }

        }
        super.onCreateContextMenu(menu, v, menuInfo);
    }

    @Override
    public boolean onContextItemSelected(MenuItem item) {
        Jid jid = mSelectedUser.getRealJid();
        switch (item.getItemId()) {
            case R.id.highlight_in_muc:
                highlightInMuc(mConversation, mSelectedUser.getName());
                return true;
            case R.id.start_conversation:
                startConversation(mSelectedUser);
                return true;
            case R.id.give_admin_privileges:
                xmppConnectionService.changeAffiliationInConference(mConversation, jid, MucOptions.Affiliation.ADMIN, this);
                return true;
            case R.id.give_membership:
                xmppConnectionService.changeAffiliationInConference(mConversation, jid, MucOptions.Affiliation.MEMBER, this);
                return true;
            case R.id.remove_membership:
                xmppConnectionService.changeAffiliationInConference(mConversation, jid, MucOptions.Affiliation.NONE, this);
                return true;
            case R.id.remove_admin_privileges:
                xmppConnectionService.changeAffiliationInConference(mConversation, jid, MucOptions.Affiliation.MEMBER, this);
                return true;
            case R.id.remove_from_room:
                removeFromRoom(mSelectedUser);
                return true;
            case R.id.ban_from_conference:
                xmppConnectionService.changeAffiliationInConference(mConversation, jid, MucOptions.Affiliation.OUTCAST, this);
                if (mSelectedUser.getRole() != MucOptions.Role.NONE) {
                    xmppConnectionService.changeRoleInConference(mConversation, mSelectedUser.getName(), MucOptions.Role.NONE, this);
                }
                return true;
            case R.id.send_private_message:
                if (mConversation.getMucOptions().allowPm()) {
                    privateMsgInMuc(mConversation, mSelectedUser.getName());
                } else {
                    Toast.makeText(this, R.string.private_messages_are_disabled, Toast.LENGTH_SHORT).show();
                }
                return true;
            case R.id.invite:
                xmppConnectionService.directInvite(mConversation, jid);
                return true;
            default:
                return super.onContextItemSelected(item);
        }
    }

    private void removeFromRoom(final User user) {
        if (mConversation.getMucOptions().membersOnly()) {
            xmppConnectionService.changeAffiliationInConference(mConversation, user.getRealJid(), MucOptions.Affiliation.NONE, this);
            if (user.getRole() != MucOptions.Role.NONE) {
                xmppConnectionService.changeRoleInConference(mConversation, mSelectedUser.getName(), MucOptions.Role.NONE, ConferenceDetailsActivity.this);
            }
        } else {
            AlertDialog.Builder builder = new AlertDialog.Builder(this);
            builder.setTitle(R.string.ban_from_conference);
            builder.setMessage(getString(R.string.removing_from_public_conference, user.getName()));
            builder.setNegativeButton(R.string.cancel, null);
            builder.setPositiveButton(R.string.ban_now, new DialogInterface.OnClickListener() {
                @Override
                public void onClick(DialogInterface dialog, int which) {
                    xmppConnectionService.changeAffiliationInConference(mConversation, user.getRealJid(), MucOptions.Affiliation.OUTCAST, ConferenceDetailsActivity.this);
                    if (user.getRole() != MucOptions.Role.NONE) {
                        xmppConnectionService.changeRoleInConference(mConversation, mSelectedUser.getName(), MucOptions.Role.NONE, ConferenceDetailsActivity.this);
                    }
                }
            });
            builder.create().show();
        }
    }

    protected void startConversation(User user) {
        if (user.getRealJid() != null) {
            Conversation conversation = xmppConnectionService.findOrCreateConversation(this.mConversation.getAccount(), user.getRealJid().toBareJid(), false, true);
            switchToConversation(conversation);
        }
    }

    protected void saveAsBookmark() {
        xmppConnectionService.saveConversationAsBookmark(mConversation,
                mConversation.getMucOptions().getSubject());
    }

    protected void deleteBookmark() {
        Account account = mConversation.getAccount();
        Bookmark bookmark = mConversation.getBookmark();
        mConversation.deregisterWithBookmark();
        account.getBookmarks().remove(bookmark);
        xmppConnectionService.pushBookmarks(account);
        updateView();
    }

    @Override
    void onBackendConnected() {
        if (mPendingConferenceInvite != null) {
            mPendingConferenceInvite.execute(this);
            mPendingConferenceInvite = null;
        }
        if (getIntent().getAction().equals(ACTION_VIEW_MUC)) {
            this.uuid = getIntent().getExtras().getString("uuid");
        }
        if (uuid != null) {
            this.mConversation = xmppConnectionService.findConversationByUuid(uuid);
            if (this.mConversation != null) {
                updateView();
            }
        }
    }

    private void updateView() {
        invalidateOptionsMenu();
        final MucOptions mucOptions = mConversation.getMucOptions();
        final User self = mucOptions.getSelf();
        String account;
        if (Config.DOMAIN_LOCK != null) {
            account = mConversation.getAccount().getJid().getLocalpart();
        } else {
            account = mConversation.getAccount().getJid().toBareJid().toString();
        }
        if (getActionBar() != null) {
            final ActionBar ab = getActionBar();
            ab.setCustomView(R.layout.ab_title);
            ab.setDisplayShowCustomEnabled(true);
            TextView abtitle = findViewById(android.R.id.text1);
            TextView absubtitle = findViewById(android.R.id.text2);
            abtitle.setText(mConversation.getName());
            abtitle.setSelected(true);
            abtitle.setClickable(false);
            absubtitle.setVisibility(View.GONE);
            absubtitle.setClickable(false);
        }
        ConferenceName.setText(mConversation.getName());
        mAccountJid.setText(getString(R.string.using_account, account));
        mYourPhoto.setImageBitmap(avatarService().get(mConversation.getAccount(), getPixel(48)));
        setTitle(mConversation.getName());
        mFullJid.setText(mConversation.getJid().toBareJid().toString());
        mYourNick.setText(mucOptions.getActualNick());
        TextView mRoleAffiliaton = findViewById(R.id.muc_role);
        if (mucOptions.online()) {
            mMoreDetails.setVisibility(View.VISIBLE);
            mMucSettings.setVisibility(View.VISIBLE);
            mConferenceInfoTable.setVisibility(this.mAdvancedMode ? View.VISIBLE : View.GONE);
            final String status = getStatus(self);
            if (status != null) {
                mRoleAffiliaton.setVisibility(View.VISIBLE);
                mRoleAffiliaton.setText(status);
            } else {
                mRoleAffiliaton.setVisibility(View.GONE);
            }
            if (mucOptions.membersOnly()) {
                mConferenceType.setText(R.string.private_conference);
            } else {
                mConferenceType.setText(R.string.public_conference);
            }
            if (mucOptions.mamSupport()) {
                mConferenceInfoMam.setText(R.string.server_info_available);
            } else {
                mConferenceInfoMam.setText(R.string.server_info_unavailable);
            }
            if (self.getAffiliation().ranks(MucOptions.Affiliation.OWNER)) {
                mChangeConferenceSettingsButton.setVisibility(View.VISIBLE);
            } else {
                mChangeConferenceSettingsButton.setVisibility(View.GONE);
            }
        } else {
            mMoreDetails.setVisibility(View.GONE);
            mMucSettings.setVisibility(View.GONE);
            mConferenceInfoTable.setVisibility(View.GONE);
        }

        long mutedTill = mConversation.getLongAttribute(Conversation.ATTRIBUTE_MUTED_TILL, 0);
        if (mutedTill == Long.MAX_VALUE) {
            mNotifyStatusText.setText(R.string.notify_never);
            mNotifyStatusButton.setImageResource(R.drawable.ic_notifications_off_grey600_24dp);
        } else if (System.currentTimeMillis() < mutedTill) {
            mNotifyStatusText.setText(R.string.notify_paused);
            mNotifyStatusButton.setImageResource(R.drawable.ic_notifications_paused_grey600_24dp);
        } else if (mConversation.alwaysNotify()) {
            mNotifyStatusButton.setImageResource(R.drawable.ic_notifications_grey600_24dp);
            mNotifyStatusText.setText(R.string.notify_on_all_messages);
        } else {
            mNotifyStatusButton.setImageResource(R.drawable.ic_notifications_none_grey600_24dp);
            mNotifyStatusText.setText(R.string.notify_only_when_highlighted);
        }

        LayoutInflater inflater = (LayoutInflater) getSystemService(Context.LAYOUT_INFLATER_SERVICE);
        membersView.removeAllViews();
        final ArrayList<User> users = mucOptions.getUsers();
        Collections.sort(users);
        for (final User user : users) {
            final Contact contact = user.getContact();
            View view = inflater.inflate(R.layout.contact, membersView, false);
            this.setListItemBackgroundOnView(view);
            if (contact != null && contact.showInRoster()) {
                view.setOnClickListener(new OnClickListener() {
                    @Override
                    public void onClick(View view) {
                        switchToContactDetails(contact);
                    }
                });
            }
            registerForContextMenu(view);
            view.setTag(user);
            TextView tvDisplayName = view.findViewById(R.id.contact_display_name);
            TextView tvKey = view.findViewById(R.id.key);
            TextView tvStatus = view.findViewById(R.id.contact_jid);
            if (mAdvancedMode && user.getPgpKeyId() != 0) {
                tvKey.setVisibility(View.VISIBLE);
                tvKey.setOnClickListener(new OnClickListener() {

                    @Override
                    public void onClick(View v) {
                        viewPgpKey(user);
                    }
                });
                tvKey.setText(OpenPgpUtils.convertKeyIdToHex(user.getPgpKeyId()));
            }
            String name = user.getName();
            if (contact != null) {
                tvDisplayName.setText(contact.getDisplayName());
                tvStatus.setText((name != null ? name + " \u2022 " : "") + getStatus(user));
            } else {
                tvDisplayName.setText(name == null ? "" : name);
                tvStatus.setText(getStatus(user));

            }
            ImageView iv = view.findViewById(R.id.contact_photo);
            iv.setImageBitmap(avatarService().get(user, getPixel(48), false));
            if (user.getRole() == MucOptions.Role.NONE) {
                tvDisplayName.setAlpha(INACTIVE_ALPHA);
                tvKey.setAlpha(INACTIVE_ALPHA);
                tvStatus.setAlpha(INACTIVE_ALPHA);
                iv.setAlpha(INACTIVE_ALPHA);
            }
            membersView.addView(view);
            if (mConversation.getMucOptions().canInvite()) {
                mInviteButton.setVisibility(View.VISIBLE);
            } else {
                mInviteButton.setVisibility(View.GONE);
            }
        }
    }

    private String getStatus(User user) {
        if (mAdvancedMode) {
            return getString(user.getAffiliation().getResId()) +
                    " (" + getString(user.getRole().getResId()) + ')';
        } else {
            return getString(user.getAffiliation().getResId());
        }
    }

    private void viewPgpKey(User user) {
        PgpEngine pgp = xmppConnectionService.getPgpEngine();
        if (pgp != null) {
            PendingIntent intent = pgp.getIntentForKey(user.getPgpKeyId());
            if (intent != null) {
                try {
                    startIntentSenderForResult(intent.getIntentSender(), 0, null, 0, 0, 0);
                } catch (SendIntentException ignored) {

                }
            }
        }
    }

    @Override
    public void onAffiliationChangedSuccessful(Jid jid) {
        refreshUi();
    }

    @Override
    public void onAffiliationChangeFailed(Jid jid, int resId) {
        displayToast(getString(resId, jid.toBareJid().toString()));
    }

    @Override
    public void onRoleChangedSuccessful(String nick) {

    }

    @Override
    public void onRoleChangeFailed(String nick, int resId) {
        displayToast(getString(resId, nick));
    }

    @Override
    public void onPushSucceeded() {
        displayToast(getString(R.string.modified_conference_options));
    }

    @Override
    public void onPushFailed() {
        displayToast(getString(R.string.could_not_modify_conference_options));
    }

    private void displayToast(final String msg) {
        runOnUiThread(new Runnable() {
            @Override
            public void run() {
                Toast.makeText(ConferenceDetailsActivity.this, msg, Toast.LENGTH_SHORT).show();
            }
        });
    }
}