import Dialog from '../Dialog';
import Client from '../../Client';
import JID from '../../JID';
import { IConnection } from '../../connection/Connection.interface';
import TableElement from '../util/TableElement';
import Translation from '../../util/Translation';
import Log from '../../util/Log';
import Account from '@src/Account';
import MultiUserContact from '@src/MultiUserContact';
import Form from '@connection/Form';

let multiUserJoinTemplate = require('../../../template/multiUserJoin.hbs');

const ENTER_KEY = 13;

export default function (server?: string, room?: string) {
   new MultiUserJoinDialog(server, room);
}

class MultiUserJoinDialog {
   private account: Account;
   private connection: IConnection;
   private defaultNickname: string;

   private dialog: Dialog;
   private dom: JQuery<HTMLElement>;
   private accountElement: JQuery<HTMLElement>;
   private serverInputElement: JQuery<HTMLElement>;
   private roomInputElement: JQuery<HTMLElement>;
   private passwordInputElement: JQuery<HTMLElement>;
   private nicknameInputElement: JQuery<HTMLElement>;

   constructor(private server?: string, private room?: string) {
      let content = multiUserJoinTemplate({
         accounts: Client.getAccountManager()
            .getAccounts()
            .map(account => ({
               uid: account.getUid(),
               jid: account.getJID().bare,
            })),
      });

      this.dialog = new Dialog(content);
      let dom = (this.dom = this.dialog.open());

      this.accountElement = dom.find('select[name="account"]');
      this.serverInputElement = dom.find('input[name="server"]');
      this.roomInputElement = dom.find('input[name="room"]');
      this.passwordInputElement = dom.find('input[name="password"]');
      this.nicknameInputElement = dom.find('input[name="nickname"]');

      if (server && room) {
         this.serverInputElement.val(server);
         this.roomInputElement.val(room);
      } else {
         this.updateAccount(Client.getAccountManager().getAccount().getUid());
      }

      this.initializeInputElements();
   }

   private updateAccount(id: string) {
      this.account = Client.getAccountManager().getAccount(id);

      this.connection = this.account.getConnection();
      this.defaultNickname = this.connection.getJID().node;

      this.nicknameInputElement.attr('placeholder', this.defaultNickname);

      this.getMultiUserServices().then((services: JID[]) => {
         this.serverInputElement.val(services[0].full);
         this.serverInputElement.trigger('change');

         $('#jsxc-serverlist select').empty();

         services.forEach(service => {
            $('#jsxc-serverlist select').append($('<option>').text(service.domain));
         });
      });
   }

   private initializeInputElements() {
      this.showContinueElements();

      this.accountElement.on('change', () => {
         let accountId = <string>this.accountElement.val();

         if (!this.server || !this.room) {
            this.updateAccount(accountId);
         }
      });

      this.serverInputElement.on('change', () => {
         this.dom.find('.jsxc-inputinfo.jsxc-server').text('').hide();

         let jid = new JID(<string>this.serverInputElement.val(), '');

         this.getMultiUserRooms(jid);
      });

      this.dom
         .find('input[type="text"], input[type="password"]')
         .keydown(() => {
            this.emptyStatusElement();
            this.showContinueElements();
         })
         .keyup(ev => {
            if (ev.which === ENTER_KEY) {
               this.continueHandler(ev);
            }
         });

      this.dom.find('.jsxc-continue').click(this.continueHandler);
      this.dom.find('.jsxc-join').click(this.joinHandler);
   }

   private showContinueElements() {
      this.dom.find('.jsxc-continue').show();
      this.dom.find('.jsxc-join').hide();
   }

   private showJoinElements() {
      this.dom.find('.jsxc-continue').hide();
      this.dom.find('.jsxc-join').show();
   }

   private getMultiUserServices() {
      let ownJid = this.connection.getJID();
      let serverJid = new JID('', ownJid.domain, '');
      let discoInfoRepository = this.account.getDiscoInfoRepository();

      return this.connection
         .getDiscoService()
         .getDiscoItems(serverJid)
         .then(stanza => {
            let promises = [];

            $(stanza)
               .find('item')
               .each((index, element) => {
                  let jid = new JID('', $(element).attr('jid'), '');

                  //@TODO cache
                  let promise = discoInfoRepository
                     .requestDiscoInfo(jid)
                     .then(discoInfo => {
                        return discoInfoRepository.hasFeature(discoInfo, 'http://jabber.org/protocol/muc');
                     })
                     .then(hasFeature => {
                        return hasFeature ? jid : undefined;
                     })
                     .catch(stanza => {
                        const from = $(stanza).attr('from') || '';

                        Log.info(`Ignore ${from} as MUC provider, because could not load disco info.`);
                     });

                  promises.push(promise);
               });

            return Promise.all(promises).then(results => {
               return results
                  .filter(jid => typeof jid !== 'undefined')
                  .sort(function compare(a, b) {
                     if (!a.domain || !b.domain) {
                        return 0;
                     }

                     if (a.domain.startsWith('conference') && !b.domain.startsWith('conference')) {
                        return -1;
                     }

                     if (!a.domain.startsWith('conference') && b.domain.startsWith('conference')) {
                        return +1;
                     }

                     return a.domain.localeCompare(b.domain);
                  });
            });
         });
   }

   private getMultiUserRooms(server: JID) {
      Log.debug('Load room list for ' + server.bare);

      let roomInfoElement = this.dom.find('.jsxc-inputinfo.jsxc-room');
      roomInfoElement.show();
      roomInfoElement.addClass('jsxc-waiting');
      roomInfoElement.text(Translation.t('Rooms_are_loaded'));

      this.connection
         .getDiscoService()
         .getDiscoItems(server)
         .then(this.parseRoomList)
         .catch(this.parseRoomListError)
         .then(() => {
            roomInfoElement.removeClass('jsxc-waiting');
         });
   }

   private parseRoomList = stanza => {
      // workaround: chrome does not display dropdown arrow for dynamically filled datalists
      $('#jsxc-roomlist select').empty();

      $(stanza)
         .find('item')
         .each(function () {
            let optionElement = $('<option>');
            let jid = new JID($(this).attr('jid'));
            let name = $(this).attr('name') || jid.node;

            optionElement.text(name);
            optionElement.attr('data-jid', jid.full);
            optionElement.attr('value', jid.node);

            $('#jsxc-roomlist select').append(optionElement);
         });

      let set = $(stanza).find('set[xmlns="http://jabber.org/protocol/rsm"]');
      let roomInfoElement = this.dom.find('.jsxc-inputinfo.jsxc-room');

      if (set.length > 0) {
         let count = set.find('count').text() || '?';

         roomInfoElement.text(
            Translation.t('Could_load_only', {
               count,
            })
         );
      } else {
         roomInfoElement.text('').hide();
      }
   };

   private parseRoomListError = stanza => {
      let serverInfoElement = this.dom.find('.jsxc-inputinfo.jsxc-server');
      let roomInfoElement = this.dom.find('.jsxc-inputinfo.jsxc-room');
      let errTextMsg = $(stanza).find('error text').text() || null;

      Log.warn('Could not load rooms', errTextMsg);

      if (errTextMsg) {
         serverInfoElement.show().text(errTextMsg);
      }

      roomInfoElement.text('').hide();
      $('#jsxc-roomlist select').empty();
   };

   private continueHandler = ev => {
      ev.preventDefault();

      this.testAndLoadRoomInfo();

      return false;
   };

   private async testAndLoadRoomInfo() {
      this.dom.find('input, select').prop('disabled', true);

      try {
         const jid = await this.testInputValues();
         const hasRoomInfo = await this.requestRoomInfo(jid);

         if (hasRoomInfo) {
            await this.requestMemberList(jid);
         }

         this.showJoinElements();
      } catch (msg) {
         this.dom.find('input, select').prop('disabled', false);

         this.setStatusMessage(typeof msg === 'string' ? msg : Translation.t('Can_not_probe_room'), 'warning');

         Log.warn('Error while probing room', msg);
      }
   }

   private testInputValues(): Promise<JID> {
      let room = <string>this.roomInputElement.val();
      let server = this.serverInputElement.val()
         ? this.serverInputElement.val()
         : this.serverInputElement.attr('placeholder');

      if (!room || !room.match(/^[^"&\'\/:<>@\s]+$/i)) {
         this.roomInputElement.addClass('jsxc-invalid').keyup(function () {
            if ($(this).val()) {
               $(this).removeClass('jsxc-invalid');
            }
         });

         return Promise.reject('MUC room JID invalid');
      }

      if (this.serverInputElement.hasClass('jsxc-invalid')) {
         return Promise.reject('MUC server invalid');
      }

      if (!room.match(/@(.*)$/)) {
         room += '@' + server;
      }

      let roomJid = new JID(room);

      if (this.account.getContact(roomJid)) {
         return Promise.reject('You_already_joined_this_room');
      }

      this.dom.find('input[name="room-jid"]').val(room);

      return Promise.resolve(roomJid);
   }

   private requestRoomInfo = async (room: JID) => {
      this.setWaitingMessage('Loading_room_information');

      const discoService = this.connection.getDiscoService();

      try {
         const stanza = await discoService.getDiscoInfo(room);
         const roomInfoElement = this.parseRoomInfo(stanza);

         this.setStatusElement(roomInfoElement);
      } catch (errorStanza) {
         if ($(errorStanza).find('item-not-found').length > 0) {
            this.setStatusMessage(Translation.t('Room_not_found_'));

            return false;
         }

         await Promise.reject('I was not able to get any room information.');
      }

      return true;
   };

   private parseRoomInfo = stanza => {
      let roomInfoElement = $('<div>');
      roomInfoElement.append(`<p>${Translation.t('This_room_is')}</p>`);

      //@TODO test for feature with muc ns

      let tableElement = new TableElement(2);

      $(stanza)
         .find('feature')
         .each((index, featureElement) => {
            let feature = $(featureElement).attr('var');

            //@REVIEW true?
            if (feature !== '' && true && feature.indexOf('muc_') === 0) {
               tableElement.appendRow(Translation.t(`${feature}.keyword`), Translation.t(`${feature}.description`));
            }

            if (feature === 'muc_passwordprotected') {
               this.passwordInputElement.parents('.form-group').removeClass('jsxc-hidden');
               this.passwordInputElement.attr('required', 'required');
               this.passwordInputElement.addClass('jsxc-invalid');
            }
         });

      let name = $(stanza).find('identity').attr('name');
      let subject = $(stanza).find('field[var="muc#roominfo_subject"]').attr('label');

      let form = Form.fromXML(stanza);
      let fields = form.getFields();

      fields.forEach(field => {
         if (!field.getLabel()) {
            return;
         }

         let value =
            field.getType() === 'boolean'
               ? field.getValues()[0] === '1'
                  ? Translation.t('Yes')
                  : Translation.t('No')
               : field.getValues().join(', ');

         tableElement.appendRow(field.getLabel(), value);
      });

      tableElement.appendRow('Name', name);
      tableElement.appendRow('Subject', subject);

      roomInfoElement.append(tableElement.get());

      roomInfoElement.append($('<input type="hidden" name="room-name">').val(name));
      roomInfoElement.append($('<input type="hidden" name="room-subject">').val(subject));

      return roomInfoElement;
   };

   private requestMemberList = (room: JID) => {
      return this.connection
         .getDiscoService()
         .getDiscoItems(room)
         .then(stanza => {
            let memberJids = $(stanza)
               .find('item')
               .map((index, element) => $(element).attr('jid'))
               .get();

            let row = $('<tr>');
            row.append($('<td>').text(Translation.t('Occupants')));
            row.append(
               $('<td>').text(memberJids.length > 0 ? memberJids.join(', ') : Translation.t('Occupants_not_provided'))
            );

            this.dom.find('.jsxc-status-container table').append(row);
         });
   };

   private joinHandler = ev => {
      ev.preventDefault();

      //@TODO disable handler, show spinner

      let jid = new JID(<string>this.dom.find('input[name="room-jid"]').val());
      let name = <string>this.dom.find('input[name="room-name"]').val() || undefined;
      let nickname = <string>this.nicknameInputElement.val() || this.defaultNickname;
      let password = <string>this.passwordInputElement.val() || undefined;
      let subject = <string>this.dom.find('input[name="room-subject"]').val() || undefined;

      let multiUserContact = new MultiUserContact(this.account, jid, name);
      multiUserContact.setNickname(nickname);
      multiUserContact.setBookmark(true);
      multiUserContact.setAutoJoin(true);
      multiUserContact.setPassword(password);
      multiUserContact.setSubject(subject);

      this.account.getContactManager().add(multiUserContact);

      multiUserContact.join();
      multiUserContact.getChatWindowController().openProminently();

      this.dialog.close();

      return false;
   };

   private setWaitingMessage(msg: string) {
      this.setStatusMessage(msg, 'waiting');
   }

   private setStatusMessage(msg: string, level?: 'waiting' | 'warning') {
      let textElement = $('<p>').text(msg);

      if (level) {
         textElement.addClass('jsxc-' + level);
      }

      this.setStatusElement(textElement);
   }

   private setStatusElement(element) {
      let messageElement = this.dom.find('.jsxc-status-container');

      messageElement.empty();
      messageElement.append(element);
   }

   private emptyStatusElement() {
      this.dom.find('.jsxc-status-container').empty();
   }
}