package eu.siacs.conversations.ui;

import android.Manifest;
import android.annotation.SuppressLint;
import android.annotation.TargetApi;
import android.app.ActionBar;
import android.app.ActionBar.Tab;
import android.app.ActionBar.TabListener;
import android.app.AlertDialog;
import android.app.Fragment;
import android.app.FragmentTransaction;
import android.app.ListFragment;
import android.app.PendingIntent;
import android.content.Context;
import android.content.DialogInterface;
import android.content.DialogInterface.OnClickListener;
import android.content.Intent;
import android.content.pm.PackageManager;
import android.net.Uri;
import android.nfc.NdefMessage;
import android.nfc.NdefRecord;
import android.nfc.NfcAdapter;
import android.os.Build;
import android.os.Bundle;
import android.os.Parcelable;
import android.support.v13.app.FragmentPagerAdapter;
import android.support.v4.view.ViewPager;
import android.text.Editable;
import android.text.TextWatcher;
import android.util.Log;
import android.util.Pair;
import android.view.ContextMenu;
import android.view.ContextMenu.ContextMenuInfo;
import android.view.KeyEvent;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.inputmethod.InputMethodManager;
import android.widget.AdapterView;
import android.widget.AdapterView.AdapterContextMenuInfo;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.ArrayAdapter;
import android.widget.AutoCompleteTextView;
import android.widget.CheckBox;
import android.widget.Checkable;
import android.widget.EditText;
import android.widget.ListView;
import android.widget.Spinner;
import android.widget.TextView;
import android.widget.Toast;

import com.google.zxing.integration.android.IntentIntegrator;
import com.google.zxing.integration.android.IntentResult;

import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collections;
import java.util.List;
import java.util.concurrent.atomic.AtomicBoolean;

import eu.siacs.conversations.Config;
import eu.siacs.conversations.R;
import eu.siacs.conversations.entities.Account;
import eu.siacs.conversations.entities.Blockable;
import eu.siacs.conversations.entities.Bookmark;
import eu.siacs.conversations.entities.Contact;
import eu.siacs.conversations.entities.Conversation;
import eu.siacs.conversations.entities.ListItem;
import eu.siacs.conversations.entities.Presence;
import eu.siacs.conversations.services.XmppConnectionService.OnRosterUpdate;
import eu.siacs.conversations.ui.adapter.KnownHostsAdapter;
import eu.siacs.conversations.ui.adapter.ListItemAdapter;
import eu.siacs.conversations.utils.XmppUri;
import eu.siacs.conversations.xmpp.OnUpdateBlocklist;
import eu.siacs.conversations.xmpp.XmppConnection;
import eu.siacs.conversations.xmpp.jid.InvalidJidException;
import eu.siacs.conversations.xmpp.jid.Jid;

public class StartConversationActivity extends XmppActivity implements OnRosterUpdate, OnUpdateBlocklist {

	public int conference_context_id;
	public int contact_context_id;
	private Tab mContactsTab;
	private Tab mConferencesTab;
	private ViewPager mViewPager;
	private MyListFragment mContactsListFragment = new MyListFragment();
	private List<ListItem> contacts = new ArrayList<>();
	private ArrayAdapter<ListItem> mContactsAdapter;
	private MyListFragment mConferenceListFragment = new MyListFragment();
	private List<ListItem> conferences = new ArrayList<ListItem>();
	private ArrayAdapter<ListItem> mConferenceAdapter;
	private List<String> mActivatedAccounts = new ArrayList<String>();
	private List<String> mKnownHosts;
	private List<String> mKnownConferenceHosts;
	private Invite mPendingInvite = null;
	private EditText mSearchEditText;
	private AtomicBoolean mRequestedContactsPermission = new AtomicBoolean(false);
	private final int REQUEST_SYNC_CONTACTS = 0x3b28cf;
	private final int REQUEST_CREATE_CONFERENCE = 0x3b39da;

	private MenuItem.OnActionExpandListener mOnActionExpandListener = new MenuItem.OnActionExpandListener() {

		@Override
		public boolean onMenuItemActionExpand(MenuItem item) {
			mSearchEditText.post(new Runnable() {

				@Override
				public void run() {
					mSearchEditText.requestFocus();
					InputMethodManager imm = (InputMethodManager) getSystemService(Context.INPUT_METHOD_SERVICE);
					imm.showSoftInput(mSearchEditText,
							InputMethodManager.SHOW_IMPLICIT);
				}
			});

			return true;
		}

		@Override
		public boolean onMenuItemActionCollapse(MenuItem item) {
			hideKeyboard();
			mSearchEditText.setText("");
			filter(null);
			return true;
		}
	};
	private boolean mHideOfflineContacts = false;
	private TabListener mTabListener = new TabListener() {

		@Override
		public void onTabUnselected(Tab tab, FragmentTransaction ft) {
			return;
		}

		@Override
		public void onTabSelected(Tab tab, FragmentTransaction ft) {
			mViewPager.setCurrentItem(tab.getPosition());
			onTabChanged();
		}

		@Override
		public void onTabReselected(Tab tab, FragmentTransaction ft) {
			return;
		}
	};
	private ViewPager.SimpleOnPageChangeListener mOnPageChangeListener = new ViewPager.SimpleOnPageChangeListener() {
		@Override
		public void onPageSelected(int position) {
			if (getActionBar() != null) {
				getActionBar().setSelectedNavigationItem(position);
			}
			onTabChanged();
		}
	};
	private TextWatcher mSearchTextWatcher = new TextWatcher() {

		@Override
		public void afterTextChanged(Editable editable) {
			filter(editable.toString());
		}

		@Override
		public void beforeTextChanged(CharSequence s, int start, int count,
				int after) {
		}

		@Override
		public void onTextChanged(CharSequence s, int start, int before,
				int count) {
		}
	};

	private  TextView.OnEditorActionListener mSearchDone = new TextView.OnEditorActionListener() {
		@Override
		public boolean onEditorAction(TextView v, int actionId, KeyEvent event) {
			if (getActionBar().getSelectedNavigationIndex() == 0) {
				if (contacts.size() == 1) {
					openConversationForContact((Contact) contacts.get(0));
				} else {
					hideKeyboard();
					mContactsListFragment.getListView().requestFocus();
				}
			} else {
				if (conferences.size() == 1) {
					openConversationsForBookmark((Bookmark) conferences.get(0));
				} else {
					hideKeyboard();
					mConferenceListFragment.getListView().requestFocus();
				}
			}
			return true;
		}
	};
	private MenuItem mMenuSearchView;
	private ListItemAdapter.OnTagClickedListener mOnTagClickedListener = new ListItemAdapter.OnTagClickedListener() {
		@Override
		public void onTagClicked(String tag) {
			if (mMenuSearchView != null) {
				mMenuSearchView.expandActionView();
				mSearchEditText.setText("");
				mSearchEditText.append(tag);
				filter(tag);
			}
		}
	};
	private String mInitialJid;
	private Pair<Integer, Intent> mPostponedActivityResult;
	private UiCallback<Conversation> mAdhocConferenceCallback = new UiCallback<Conversation>() {
		@Override
		public void success(final Conversation conversation) {
			runOnUiThread(new Runnable() {
				@Override
				public void run() {
					hideToast();
					switchToConversation(conversation);
				}
			});
		}

		@Override
		public void error(final int errorCode, Conversation object) {
			runOnUiThread(new Runnable() {
				@Override
				public void run() {
					replaceToast(getString(errorCode));
				}
			});
		}

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

		}
	};
	private Toast mToast;

	protected void hideToast() {
		if (mToast != null) {
			mToast.cancel();
		}
	}

	protected void replaceToast(String msg) {
		hideToast();
		mToast = Toast.makeText(this, msg ,Toast.LENGTH_LONG);
		mToast.show();
	}

	@Override
	public void onRosterUpdate() {
		this.refreshUi();
	}

	@Override
	public void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_start_conversation);
		mViewPager = (ViewPager) findViewById(R.id.start_conversation_view_pager);
		ActionBar actionBar = getActionBar();
		actionBar.setNavigationMode(ActionBar.NAVIGATION_MODE_TABS);

		mContactsTab = actionBar.newTab().setText(R.string.contacts)
			.setTabListener(mTabListener);
		mConferencesTab = actionBar.newTab().setText(R.string.conferences)
			.setTabListener(mTabListener);
		actionBar.addTab(mContactsTab);
		actionBar.addTab(mConferencesTab);

		mViewPager.setOnPageChangeListener(mOnPageChangeListener);
		mViewPager.setAdapter(new FragmentPagerAdapter(getFragmentManager()) {

			@Override
			public int getCount() {
				return 2;
			}

			@Override
			public Fragment getItem(int position) {
				if (position == 0) {
					return mContactsListFragment;
				} else {
					return mConferenceListFragment;
				}
			}
		});

		mConferenceAdapter = new ListItemAdapter(this, conferences);
		mConferenceListFragment.setListAdapter(mConferenceAdapter);
		mConferenceListFragment.setContextMenu(R.menu.conference_context);
		mConferenceListFragment
			.setOnListItemClickListener(new OnItemClickListener() {

				@Override
				public void onItemClick(AdapterView<?> arg0, View arg1,
						int position, long arg3) {
					openConversationForBookmark(position);
				}
			});

		mContactsAdapter = new ListItemAdapter(this, contacts);
		((ListItemAdapter) mContactsAdapter).setOnTagClickedListener(this.mOnTagClickedListener);
		mContactsListFragment.setListAdapter(mContactsAdapter);
		mContactsListFragment.setContextMenu(R.menu.contact_context);
		mContactsListFragment
			.setOnListItemClickListener(new OnItemClickListener() {

				@Override
				public void onItemClick(AdapterView<?> arg0, View arg1,
						int position, long arg3) {
					openConversationForContact(position);
				}
			});

		this.mHideOfflineContacts = getPreferences().getBoolean("hide_offline", false);

	}

	@Override
	public void onStart() {
		super.onStart();
		askForContactsPermissions();
	}

	protected void openConversationForContact(int position) {
		Contact contact = (Contact) contacts.get(position);
		openConversationForContact(contact);
	}

	protected void openConversationForContact(Contact contact) {
		Conversation conversation = xmppConnectionService
			.findOrCreateConversation(contact.getAccount(),
					contact.getJid(), false);
		switchToConversation(conversation);
	}

	protected void openConversationForContact() {
		int position = contact_context_id;
		openConversationForContact(position);
	}

	protected void openConversationForBookmark() {
		openConversationForBookmark(conference_context_id);
	}

	protected void openConversationForBookmark(int position) {
		Bookmark bookmark = (Bookmark) conferences.get(position);
		openConversationsForBookmark(bookmark);
	}

	protected void openConversationsForBookmark(Bookmark bookmark) {
		Jid jid = bookmark.getJid();
		if (jid == null) {
			Toast.makeText(this,R.string.invalid_jid,Toast.LENGTH_SHORT).show();
			return;
		}
		Conversation conversation = xmppConnectionService.findOrCreateConversation(bookmark.getAccount(),jid, true);
		conversation.setBookmark(bookmark);
		if (!conversation.getMucOptions().online()) {
			xmppConnectionService.joinMuc(conversation);
		}
		if (!bookmark.autojoin() && getPreferences().getBoolean("autojoin", true)) {
			bookmark.setAutojoin(true);
			xmppConnectionService.pushBookmarks(bookmark.getAccount());
		}
		switchToConversation(conversation);
	}

	protected void openDetailsForContact() {
		int position = contact_context_id;
		Contact contact = (Contact) contacts.get(position);
		switchToContactDetails(contact);
	}

	protected void toggleContactBlock() {
		final int position = contact_context_id;
		BlockContactDialog.show(this, xmppConnectionService, (Contact) contacts.get(position));
	}

	protected void deleteContact() {
		final int position = contact_context_id;
		final Contact contact = (Contact) contacts.get(position);
		final AlertDialog.Builder builder = new AlertDialog.Builder(this);
		builder.setNegativeButton(R.string.cancel, null);
		builder.setTitle(R.string.action_delete_contact);
		builder.setMessage(getString(R.string.remove_contact_text,
				contact.getJid()));
		builder.setPositiveButton(R.string.delete, new OnClickListener() {

			@Override
			public void onClick(DialogInterface dialog, int which) {
				xmppConnectionService.deleteContactOnServer(contact);
				filter(mSearchEditText.getText().toString());
			}
		});
		builder.create().show();
	}

	protected void deleteConference() {
		int position = conference_context_id;
		final Bookmark bookmark = (Bookmark) conferences.get(position);

		AlertDialog.Builder builder = new AlertDialog.Builder(this);
		builder.setNegativeButton(R.string.cancel, null);
		builder.setTitle(R.string.delete_bookmark);
		builder.setMessage(getString(R.string.remove_bookmark_text,
				bookmark.getJid()));
		builder.setPositiveButton(R.string.delete, new OnClickListener() {

			@Override
			public void onClick(DialogInterface dialog, int which) {
				bookmark.unregisterConversation();
				Account account = bookmark.getAccount();
				account.getBookmarks().remove(bookmark);
				xmppConnectionService.pushBookmarks(account);
				filter(mSearchEditText.getText().toString());
			}
		});
		builder.create().show();

	}

	@SuppressLint("InflateParams")
	protected void showCreateContactDialog(final String prefilledJid, final String fingerprint) {
		EnterJidDialog dialog = new EnterJidDialog(
			this, mKnownHosts, mActivatedAccounts,
			getString(R.string.create_contact), getString(R.string.create),
			prefilledJid, null, fingerprint == null
		);

		dialog.setOnEnterJidDialogPositiveListener(new EnterJidDialog.OnEnterJidDialogPositiveListener() {
			@Override
			public boolean onEnterJidDialogPositive(Jid accountJid, Jid contactJid) throws EnterJidDialog.JidError {
				if (!xmppConnectionServiceBound) {
					return false;
				}

				final Account account = xmppConnectionService.findAccountByJid(accountJid);
				if (account == null) {
					return true;
				}

				final Contact contact = account.getRoster().getContact(contactJid);
				if (contact.showInRoster()) {
					throw new EnterJidDialog.JidError(getString(R.string.contact_already_exists));
				} else {
					contact.addOtrFingerprint(fingerprint);
					xmppConnectionService.createContact(contact);
					switchToConversation(contact);
					return true;
				}
			}
		});

		dialog.show();
	}

	@SuppressLint("InflateParams")
	protected void showJoinConferenceDialog(final String prefilledJid) {
		final AlertDialog.Builder builder = new AlertDialog.Builder(this);
		builder.setTitle(R.string.join_conference);
		final View dialogView = getLayoutInflater().inflate(R.layout.join_conference_dialog, null);
		final Spinner spinner = (Spinner) dialogView.findViewById(R.id.account);
		final AutoCompleteTextView jid = (AutoCompleteTextView) dialogView.findViewById(R.id.jid);
		final TextView jabberIdDesc = (TextView) dialogView.findViewById(R.id.jabber_id);
		jabberIdDesc.setText(R.string.conference_address);
		jid.setHint(R.string.conference_address_example);
		jid.setAdapter(new KnownHostsAdapter(this, R.layout.simple_list_item, mKnownConferenceHosts));
		if (prefilledJid != null) {
			jid.append(prefilledJid);
		}
		populateAccountSpinner(this, mActivatedAccounts, spinner);
		final Checkable bookmarkCheckBox = (CheckBox) dialogView
			.findViewById(R.id.bookmark);
		builder.setView(dialogView);
		builder.setNegativeButton(R.string.cancel, null);
		builder.setPositiveButton(R.string.join, null);
		final AlertDialog dialog = builder.create();
		dialog.show();
		dialog.getButton(AlertDialog.BUTTON_POSITIVE).setOnClickListener(
				new View.OnClickListener() {

					@Override
					public void onClick(final View v) {
						if (!xmppConnectionServiceBound) {
							return;
						}
						final Account account = getSelectedAccount(spinner);
						if (account == null) {
							return;
						}
						final Jid conferenceJid;
						try {
							conferenceJid = Jid.fromString(jid.getText().toString());
						} catch (final InvalidJidException e) {
							jid.setError(getString(R.string.invalid_jid));
							return;
						}

						if (bookmarkCheckBox.isChecked()) {
							if (account.hasBookmarkFor(conferenceJid)) {
								jid.setError(getString(R.string.bookmark_already_exists));
							} else {
								final Bookmark bookmark = new Bookmark(account, conferenceJid.toBareJid());
								bookmark.setAutojoin(getPreferences().getBoolean("autojoin", true));
								String nick = conferenceJid.getResourcepart();
								if (nick != null && !nick.isEmpty()) {
									bookmark.setNick(nick);
								}
								account.getBookmarks().add(bookmark);
								xmppConnectionService.pushBookmarks(account);
								final Conversation conversation = xmppConnectionService
										.findOrCreateConversation(account,
												conferenceJid, true);
								conversation.setBookmark(bookmark);
								if (!conversation.getMucOptions().online()) {
									xmppConnectionService.joinMuc(conversation);
								}
								dialog.dismiss();
								switchToConversation(conversation);
							}
						} else {
							final Conversation conversation = xmppConnectionService
									.findOrCreateConversation(account,
											conferenceJid, true);
							if (!conversation.getMucOptions().online()) {
								xmppConnectionService.joinMuc(conversation);
							}
							dialog.dismiss();
							switchToConversation(conversation);
						}
					}
				});
	}

	private void showCreateConferenceDialog() {
		final AlertDialog.Builder builder = new AlertDialog.Builder(this);
		builder.setTitle(R.string.create_conference);
		final View dialogView = getLayoutInflater().inflate(R.layout.create_conference_dialog, null);
		final Spinner spinner = (Spinner) dialogView.findViewById(R.id.account);
		final EditText subject = (EditText) dialogView.findViewById(R.id.subject);
		populateAccountSpinner(this, mActivatedAccounts, spinner);
		builder.setView(dialogView);
		builder.setPositiveButton(R.string.choose_participants, new OnClickListener() {
			@Override
			public void onClick(DialogInterface dialog, int which) {
				if (!xmppConnectionServiceBound) {
					return;
				}
				final Account account = getSelectedAccount(spinner);
				if (account == null) {
					return;
				}
				Intent intent = new Intent(getApplicationContext(), ChooseContactActivity.class);
				intent.putExtra("multiple", true);
				intent.putExtra("show_enter_jid", true);
				intent.putExtra("subject", subject.getText().toString());
				intent.putExtra(EXTRA_ACCOUNT, account.getJid().toBareJid().toString());
				intent.putExtra(ChooseContactActivity.EXTRA_TITLE_RES_ID,R.string.choose_participants);
				startActivityForResult(intent, REQUEST_CREATE_CONFERENCE);
			}
		});
		builder.setNegativeButton(R.string.cancel, null);
		builder.create().show();
	}

	private Account getSelectedAccount(Spinner spinner) {
		if (!spinner.isEnabled()) {
			return null;
		}
		Jid jid;
		try {
			if (Config.DOMAIN_LOCK != null) {
				jid = Jid.fromParts((String) spinner.getSelectedItem(), Config.DOMAIN_LOCK, null);
			} else {
				jid = Jid.fromString((String) spinner.getSelectedItem());
			}
		} catch (final InvalidJidException e) {
			return null;
		}
		return xmppConnectionService.findAccountByJid(jid);
	}

	protected void switchToConversation(Contact contact) {
		Conversation conversation = xmppConnectionService
			.findOrCreateConversation(contact.getAccount(),
					contact.getJid(), false);
		switchToConversation(conversation);
	}

	public static void populateAccountSpinner(Context context, List<String> accounts, Spinner spinner) {
		if (accounts.size() > 0) {
			ArrayAdapter<String> adapter = new ArrayAdapter<>(context, R.layout.simple_list_item, accounts);
			adapter.setDropDownViewResource(R.layout.simple_list_item);
			spinner.setAdapter(adapter);
			spinner.setEnabled(true);
		} else {
			ArrayAdapter<String> adapter = new ArrayAdapter<>(context,
					R.layout.simple_list_item,
					Arrays.asList(new String[]{context.getString(R.string.no_accounts)}));
			adapter.setDropDownViewResource(R.layout.simple_list_item);
			spinner.setAdapter(adapter);
			spinner.setEnabled(false);
		}
	}

	@Override
	public boolean onCreateOptionsMenu(Menu menu) {
		getMenuInflater().inflate(R.menu.start_conversation, menu);
		MenuItem menuCreateContact = menu.findItem(R.id.action_create_contact);
		MenuItem menuCreateConference = menu.findItem(R.id.action_conference);
		MenuItem menuHideOffline = menu.findItem(R.id.action_hide_offline);
		menuHideOffline.setChecked(this.mHideOfflineContacts);
		mMenuSearchView = menu.findItem(R.id.action_search);
		mMenuSearchView.setOnActionExpandListener(mOnActionExpandListener);
		View mSearchView = mMenuSearchView.getActionView();
		mSearchEditText = (EditText) mSearchView
			.findViewById(R.id.search_field);
		mSearchEditText.addTextChangedListener(mSearchTextWatcher);
		mSearchEditText.setOnEditorActionListener(mSearchDone);
		if (getActionBar().getSelectedNavigationIndex() == 0) {
			menuCreateConference.setVisible(false);
		} else {
			menuCreateContact.setVisible(false);
		}
		if (mInitialJid != null) {
			mMenuSearchView.expandActionView();
			mSearchEditText.append(mInitialJid);
			filter(mInitialJid);
		}
		return super.onCreateOptionsMenu(menu);
	}

	@Override
	public boolean onOptionsItemSelected(MenuItem item) {
		switch (item.getItemId()) {
			case R.id.action_create_contact:
				showCreateContactDialog(null,null);
				return true;
			case R.id.action_join_conference:
				showJoinConferenceDialog(null);
				return true;
			case R.id.action_create_conference:
				showCreateConferenceDialog();
				return true;
			case R.id.action_scan_qr_code:
				new IntentIntegrator(this).initiateScan();
				return true;
			case R.id.action_hide_offline:
				mHideOfflineContacts = !item.isChecked();
				getPreferences().edit().putBoolean("hide_offline", mHideOfflineContacts).commit();
				if (mSearchEditText != null) {
					filter(mSearchEditText.getText().toString());
				}
				invalidateOptionsMenu();
		}
		return super.onOptionsItemSelected(item);
	}

	@Override
	public boolean onKeyUp(int keyCode, KeyEvent event) {
		if (keyCode == KeyEvent.KEYCODE_SEARCH && !event.isLongPress()) {
			openSearch();
			return true;
		}
		int c = event.getUnicodeChar();
		if (c > 32) {
			if (mSearchEditText != null && !mSearchEditText.isFocused()) {
				openSearch();
				mSearchEditText.append(Character.toString((char) c));
				return true;
			}
		}
		return super.onKeyUp(keyCode, event);
	}

	private void openSearch() {
		if (mMenuSearchView != null) {
			mMenuSearchView.expandActionView();
		}
	}

	@Override
	public void onActivityResult(int requestCode, int resultCode, Intent intent) {
		if ((requestCode & 0xFFFF) == IntentIntegrator.REQUEST_CODE) {
			IntentResult scanResult = IntentIntegrator.parseActivityResult(requestCode, resultCode, intent);
			if (scanResult != null && scanResult.getFormatName() != null) {
				String data = scanResult.getContents();
				Invite invite = new Invite(data);
				if (xmppConnectionServiceBound) {
					invite.invite();
				} else if (invite.getJid() != null) {
					this.mPendingInvite = invite;
				} else {
					this.mPendingInvite = null;
				}
			}
		} else if (resultCode == RESULT_OK) {
			if (xmppConnectionServiceBound) {
				this.mPostponedActivityResult = null;
				if (requestCode == REQUEST_CREATE_CONFERENCE) {
					Account account = extractAccount(intent);
					final String subject = intent.getStringExtra("subject");
					List<Jid> jids = new ArrayList<>();
					if (intent.getBooleanExtra("multiple", false)) {
						String[] toAdd = intent.getStringArrayExtra("contacts");
						for (String item : toAdd) {
							try {
								jids.add(Jid.fromString(item));
							} catch (InvalidJidException e) {
								//ignored
							}
						}
					} else {
						try {
							jids.add(Jid.fromString(intent.getStringExtra("contact")));
						} catch (Exception e) {
							//ignored
						}
					}
					if (account != null && jids.size() > 0) {
						xmppConnectionService.createAdhocConference(account, subject, jids, mAdhocConferenceCallback);
						mToast = Toast.makeText(this, R.string.creating_conference,Toast.LENGTH_LONG);
						mToast.show();
					}
				}
			} else {
				this.mPostponedActivityResult = new Pair<>(requestCode, intent);
			}
		}
		super.onActivityResult(requestCode, requestCode, intent);
	}

	private void askForContactsPermissions() {
		if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
			if (checkSelfPermission(Manifest.permission.READ_CONTACTS) != PackageManager.PERMISSION_GRANTED) {
				if (mRequestedContactsPermission.compareAndSet(false, true)) {
					if (shouldShowRequestPermissionRationale(Manifest.permission.READ_CONTACTS)) {
						AlertDialog.Builder builder = new AlertDialog.Builder(this);
						builder.setTitle(R.string.sync_with_contacts);
						builder.setMessage(R.string.sync_with_contacts_long);
						builder.setPositiveButton(R.string.next, new OnClickListener() {
							@Override
							public void onClick(DialogInterface dialog, int which) {
								if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
									requestPermissions(new String[]{Manifest.permission.READ_CONTACTS}, REQUEST_SYNC_CONTACTS);
								}
							}
						});
						builder.create().show();
					} else {
						requestPermissions(new String[]{Manifest.permission.READ_CONTACTS}, 0);
					}
				}
			}
		}
	}

	@Override
	public void onRequestPermissionsResult(int requestCode, String permissions[], int[] grantResults) {
		if (grantResults.length > 0)
			if (grantResults[0] == PackageManager.PERMISSION_GRANTED) {
				if (requestCode == REQUEST_SYNC_CONTACTS && xmppConnectionServiceBound) {
					xmppConnectionService.loadPhoneContacts();
				}
			}
	}

	@Override
	protected void onBackendConnected() {
		if (mPostponedActivityResult != null) {
			onActivityResult(mPostponedActivityResult.first, RESULT_OK, mPostponedActivityResult.second);
			this.mPostponedActivityResult = null;
		}
		this.mActivatedAccounts.clear();
		for (Account account : xmppConnectionService.getAccounts()) {
			if (account.getStatus() != Account.State.DISABLED) {
				if (Config.DOMAIN_LOCK != null) {
					this.mActivatedAccounts.add(account.getJid().getLocalpart());
				} else {
					this.mActivatedAccounts.add(account.getJid().toBareJid().toString());
				}
			}
		}
		final Intent intent = getIntent();
		final ActionBar ab = getActionBar();
		if (intent != null && intent.getBooleanExtra("init",false) && ab != null) {
			ab.setDisplayShowHomeEnabled(false);
			ab.setDisplayHomeAsUpEnabled(false);
			ab.setHomeButtonEnabled(false);
		}
		this.mKnownHosts = xmppConnectionService.getKnownHosts();
		this.mKnownConferenceHosts = xmppConnectionService.getKnownConferenceHosts();
		if (this.mPendingInvite != null) {
			mPendingInvite.invite();
			this.mPendingInvite = null;
		} else if (!handleIntent(getIntent())) {
			if (mSearchEditText != null) {
				filter(mSearchEditText.getText().toString());
			} else {
				filter(null);
			}
		}
		setIntent(null);
	}

	@TargetApi(Build.VERSION_CODES.JELLY_BEAN)
	Invite getInviteJellyBean(NdefRecord record) {
		return new Invite(record.toUri());
	}

	protected boolean handleIntent(Intent intent) {
		if (intent == null || intent.getAction() == null) {
			return false;
		}
		switch (intent.getAction()) {
			case Intent.ACTION_SENDTO:
			case Intent.ACTION_VIEW:
				Log.d(Config.LOGTAG, "received uri=" + intent.getData());
				return new Invite(intent.getData()).invite();
			case NfcAdapter.ACTION_NDEF_DISCOVERED:
				for (Parcelable message : getIntent().getParcelableArrayExtra(NfcAdapter.EXTRA_NDEF_MESSAGES)) {
					if (message instanceof NdefMessage) {
						Log.d(Config.LOGTAG, "received message=" + message);
						for (NdefRecord record : ((NdefMessage) message).getRecords()) {
							switch (record.getTnf()) {
								case NdefRecord.TNF_WELL_KNOWN:
									if (Arrays.equals(record.getType(), NdefRecord.RTD_URI)) {
										if (android.os.Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN) {
											return getInviteJellyBean(record).invite();
										} else {
											byte[] payload = record.getPayload();
											if (payload[0] == 0) {
												return new Invite(Uri.parse(new String(Arrays.copyOfRange(
																	payload, 1, payload.length)))).invite();
											}
										}
									}
							}
						}
					}
				}
		}
		return false;
	}

	private boolean handleJid(Invite invite) {
		List<Contact> contacts = xmppConnectionService.findContacts(invite.getJid());
		if (invite.isMuc()) {
			Conversation muc = xmppConnectionService.findFirstMuc(invite.getJid());
			if (muc != null) {
				switchToConversation(muc);
				return true;
			} else {
				showJoinConferenceDialog(invite.getJid().toBareJid().toString());
				return false;
			}
		} else if (contacts.size() == 0) {
			showCreateContactDialog(invite.getJid().toString(),invite.getFingerprint());
			return false;
		} else if (contacts.size() == 1) {
			Contact contact = contacts.get(0);
			if (invite.getFingerprint() != null) {
				if (contact.addOtrFingerprint(invite.getFingerprint())) {
					Log.d(Config.LOGTAG,"added new fingerprint");
					xmppConnectionService.syncRosterToDisk(contact.getAccount());
				}
			}
			switchToConversation(contact);
			return true;
		} else {
			if (mMenuSearchView != null) {
				mMenuSearchView.expandActionView();
				mSearchEditText.setText("");
				mSearchEditText.append(invite.getJid().toString());
				filter(invite.getJid().toString());
			} else {
				mInitialJid = invite.getJid().toString();
			}
			return true;
		}
	}

	protected void filter(String needle) {
		if (xmppConnectionServiceBound) {
			this.filterContacts(needle);
			this.filterConferences(needle);
		}
	}

	protected void filterContacts(String needle) {
		this.contacts.clear();
		for (Account account : xmppConnectionService.getAccounts()) {
			if (account.getStatus() != Account.State.DISABLED) {
				for (Contact contact : account.getRoster().getContacts()) {
					Presence p = contact.getPresences().getMostAvailablePresence();
					Presence.Status s = p == null ? Presence.Status.OFFLINE : p.getStatus();
					if (contact.showInRoster() && contact.match(this, needle)
							&& (!this.mHideOfflineContacts
							|| (needle != null && !needle.trim().isEmpty())
							|| s.compareTo(Presence.Status.OFFLINE) < 0)) {
						this.contacts.add(contact);
					}
				}
			}
		}
		Collections.sort(this.contacts);
		mContactsAdapter.notifyDataSetChanged();
	}

	protected void filterConferences(String needle) {
		this.conferences.clear();
		for (Account account : xmppConnectionService.getAccounts()) {
			if (account.getStatus() != Account.State.DISABLED) {
				for (Bookmark bookmark : account.getBookmarks()) {
					if (bookmark.match(this, needle)) {
						this.conferences.add(bookmark);
					}
				}
			}
		}
		Collections.sort(this.conferences);
		mConferenceAdapter.notifyDataSetChanged();
	}

	private void onTabChanged() {
		invalidateOptionsMenu();
	}

	@Override
	public void OnUpdateBlocklist(final Status status) {
		refreshUi();
	}

	@Override
	protected void refreshUiReal() {
		if (mSearchEditText != null) {
			filter(mSearchEditText.getText().toString());
		}
	}

	public static class MyListFragment extends ListFragment {
		private AdapterView.OnItemClickListener mOnItemClickListener;
		private int mResContextMenu;

		public void setContextMenu(final int res) {
			this.mResContextMenu = res;
		}

		@Override
		public void onListItemClick(final ListView l, final View v, final int position, final long id) {
			if (mOnItemClickListener != null) {
				mOnItemClickListener.onItemClick(l, v, position, id);
			}
		}

		public void setOnListItemClickListener(AdapterView.OnItemClickListener l) {
			this.mOnItemClickListener = l;
		}

		@Override
		public void onViewCreated(final View view, final Bundle savedInstanceState) {
			super.onViewCreated(view, savedInstanceState);
			registerForContextMenu(getListView());
			getListView().setFastScrollEnabled(true);
		}

		@Override
		public void onCreateContextMenu(final ContextMenu menu, final View v,
				final ContextMenuInfo menuInfo) {
			super.onCreateContextMenu(menu, v, menuInfo);
			final StartConversationActivity activity = (StartConversationActivity) getActivity();
			activity.getMenuInflater().inflate(mResContextMenu, menu);
			final AdapterView.AdapterContextMenuInfo acmi = (AdapterContextMenuInfo) menuInfo;
			if (mResContextMenu == R.menu.conference_context) {
				activity.conference_context_id = acmi.position;
			} else if (mResContextMenu == R.menu.contact_context){
				activity.contact_context_id = acmi.position;
				final Blockable contact = (Contact) activity.contacts.get(acmi.position);
				final MenuItem blockUnblockItem = menu.findItem(R.id.context_contact_block_unblock);
				XmppConnection xmpp = contact.getAccount().getXmppConnection();
				if (xmpp != null && xmpp.getFeatures().blocking()) {
					if (contact.isBlocked()) {
						blockUnblockItem.setTitle(R.string.unblock_contact);
					} else {
						blockUnblockItem.setTitle(R.string.block_contact);
					}
				} else {
					blockUnblockItem.setVisible(false);
				}
			}
		}

		@Override
		public boolean onContextItemSelected(final MenuItem item) {
			StartConversationActivity activity = (StartConversationActivity) getActivity();
			switch (item.getItemId()) {
				case R.id.context_start_conversation:
					activity.openConversationForContact();
					break;
				case R.id.context_contact_details:
					activity.openDetailsForContact();
					break;
				case R.id.context_contact_block_unblock:
					activity.toggleContactBlock();
					break;
				case R.id.context_delete_contact:
					activity.deleteContact();
					break;
				case R.id.context_join_conference:
					activity.openConversationForBookmark();
					break;
				case R.id.context_delete_conference:
					activity.deleteConference();
			}
			return true;
		}
	}

	private class Invite extends XmppUri {

		public Invite(final Uri uri) {
			super(uri);
		}

		public Invite(final String uri) {
			super(uri);
		}

		boolean invite() {
			if (jid != null) {
				return handleJid(this);
			}
			return false;
		}

		public boolean isMuc() {
			return muc;
		}
	}
}