import { Injectable } from '@angular/core';
import { MessageService } from './message.service';
import * as Parse from 'parse';
@Injectable({
  providedIn: 'root',
})
export class ConnectTaskService {
  anchorChannelName?: string;
  msChannelName: string = 'user_connect_room'; // 主播在线上报频道
  onlineUserList: Array<string> = []; // 在线用户列表
  isSubscribe: boolean = false;
  constructor(private msgSer: MessageService) {}

  async init() {
    // 初始化消息服务,所有用户静默登录
    await this.msgSer.initRTM(this.msChannelName);
    await this.anchorOnline();
    this.getOnlieUserList(this.msChannelName, 'MESSAGE');
  }
  reset(){
    this.onlineUserList = [];
    this.isSubscribe = false;
  }
  /* 主播上线 */
  async anchorOnline() {
    let profile = JSON.parse(localStorage.getItem('profile') || '');
    const uid = Parse.User.current()?.id!;
    if (profile?.identyType == 'anchor' && !this.isSubscribe) {
      let nowChannes = await this.getWhereNow(uid);
      console.log('用户已订阅频道：', nowChannes);
      // if (!nowChannes.includes(this.msChannelName)) {
        console.log('订阅成功');
        /* 主播订阅主播频道 */
        this.msgSer.subscribeMessage(this.msChannelName); //主播开启并订阅自己的聊天频道
      // }
      // if (!nowChannes.includes(uid)) {
        this.msgSer.subscribeMessage(uid, { message: true }); //开启并订阅自己的聊天频道
      // }
    }
  }

  /* 获取用户当前所在频道 */
  async getWhereNow(userId: string): Promise<Array<string>> {
    let channes: Array<string> = [];
    try {
      const whereNowResult = await this.msgSer.rtmClient.presence.whereNow(
        userId
      );
      const { channels, totalChannel } = whereNowResult;
      channels.forEach((channelInfo: any) => {
        const { channelName, channelType } = channelInfo;
        channes.push(channelName);
      });
      return channes;
    } catch (status: any) {
      const { operation, reason, errorCode } = status;
      console.error(
        `${operation} failed, the error code is ${errorCode}, because of: ${reason}.`
      );
      return [];
    }
  }

  /* 获取在线用户列表 */
  async getOnlieUserList(
    channelName: string,
    page?: string,
    channelType?: string
  ) {
    if (this.onlineUserList.length > 0) return;
    console.log('获取在线用户列表');
    const options: any = {
      includedUserId: true,
      includedState: true,
    };
    if(page) options.page = page;
    try {
      const result = await this.msgSer.rtmClient.presence.whoNow(
        channelName,
        channelType ?? 'MESSAGE',
        options
      );
      // console.log(result);
      // 如果 nextPage 存在，下一次调用 whoNow 时，需将 nextPage 的值填入 whoNowOptions 的 page 字段
      const { totalOccupancy, occupants, nextPage } = result;
      occupants.forEach((userInfo: any) => {
        const { states, userId, statesCount } = userInfo;
        this.onlineUserList.push(userId);
      });
      if (nextPage) this.getOnlieUserList(channelName, nextPage, channelType);
    } catch (status: any) {
      const { operation, reason, errorCode } = status;
      console.error(
        `${operation} failed, ErrorCode: ${errorCode}, due to: ${reason}.`
      );
    }
  }
}