const Code = require("../../../../../shared/code");

module.exports = function (app) {
  return new ChatHandler(app);
};

class ChatHandler {
  constructor(app) {
    this.app = app;
    this.channelService = this.app.get('channelService');
  }

  /**
   * 加入世界频道
   * @param {*} msg 
   * @param {*} session 
   * @param {*} next 
   * @returns 
   */
  async joinWorldChannel(msg, session, next) {
    const uid = session.uid;
    const channelId = 'worldChannel';

    const channel = this.channelService.getChannel(channelId, true);
    if (channel.getMember(uid)) {
      next(null, {code:Code.CHAT.FA_USER_ALREAD_JOINED, msg: "User already joined the world channel"});
      return;
    }
    channel.add(session.uid, session.get('sid'));

    next(null, { code: Code.OK });
  }

  /**
   * 离开世界频道
   * @param {*} msg 
   * @param {*} session 
   * @param {*} next 
   */
  async leaveWorldChannel(msg, session, next) {
    const username = session.get('username');
    const channelId = 'worldChannel';

    const channel = this.channelService.getChannel(channelId, false);
    if (channel) {
      channel.leave(session.uid, session.get('sid'));
    }

    next(null, { code: Code.OK });
  }

  // 加入队伍频道
  async joinTeamChannel(msg, session, next) {
    const uid = session.uid;
    const teamId = msg.teamId;

    const channelId = `teamChannel_${teamId}`;

    const channel = this.channelService.getChannel(channelId, true);
    if (channel.getMember(uid)) {
      next(null, {code:Code.CHAT.FA_USER_ALREAD_JOINED, msg: "User already joined the team channel"});
      return;
    }
    channel.add(session.uid, session.get('sid'));

    next(null, { code: 200 });

    channel.pushMessage({
      route: 'onAdd',
      user: uid,
    });
  }

  // 离开队伍频道
  async leaveTeamChannel(msg, session, next) {
    const uid = session.uid;
    const username = session.get('username');
    const teamId = msg.teamId;

    const channelId = `teamChannel_${teamId}`;
    // 把this.app.get('channelService') 替换成 this.channelService
    const channel = this.app.get('channelService').getChannel(channelId, false);
    if (channel) {
      channel.leave(uid, session.get('sid'));
    }

    next(null, { code: 200 });

    channel.pushMessage({
      route: 'onLeave',
      user: uid,
    })
  }

  
  // 世界聊天
  async worldChat(msg, session, next) {
    const username = session.get('username');
    const content = msg.content;
    const channelId = 'worldChannel';

    const channel = this.app.get('channelService').getChannel(channelId, true);

    channel.pushMessage({
      route: 'onChat',
      from: username,
      content: content,
      type: 'world'
    });

    next(null, { code: 200 });
  }

  // 队伍聊天
  async teamChat(msg, session, next) {
    const uid = session.uid;
    const username = session.get('username');
    const content = msg.content;
    const teamId = msg.teamId;

    const channelId = `teamChannel_${teamId}`;

    const channel = this.app.get('channelService').getChannel(channelId, true);
    if (channel.getMember(uid)) {
      channel.pushMessage({
        route: 'onChat',
        from: username,
        content: content,
        type: 'team',
        teamId: teamId
      });
      next(null, { code: 200 });
    }

    next(null, { code: Code.CHAT.FA_USER_NOT_TEAM_MEMBER, msg: "User not team member"});
  }
}