/* eslint-disable */
import TRTC from 'trtc-js-sdk'

class RtcClient {
  constructor(options) {
    this.sdkAppId_ = options.sdkAppId;
    this.userId_ = options.userId;
    this.userSig_ = options.userSig;
    this.roomId_ = options.roomId;

    this.isJoined_ = false;
    this.isPublished_ = false;
    this.localStream_ = null;
    this.remoteStreams_ = [];
    this.ready = false

    // check if browser is compatible with TRTC
    TRTC.checkSystemRequirements().then(result => {
      if (!result) {
        alert('Your browser is not compatible with TRTC! Please download Chrome M72+');
      }
    });
  }

  async join() {
    if (this.isJoined_) {
      console.warn('duplicate RtcClient.join() observed');
      return;
    }

    // create a client for RtcClient
    this.client_ = TRTC.createClient({
      mode: 'videoCall', // 实时通话模式
      sdkAppId: this.sdkAppId_,
      userId: this.userId_,
      userSig: this.userSig_
    });

    // 处理 client 事件
    this.handleEvents();

    try {
      // join the room
      await this.client_.join({ roomId: this.roomId_ });
      console.log('join room success');
      this.isJoined_ = true;
    } catch (error) {
      window.dispatchEvent(new Event('leave'));
      console.warn('RtcClient.join join room fail:', JSON.stringify(error))
      alert('进房失败')
      return;
    }

    this.localStream_.on('player-state-changed', event => {
      console.log(`local stream ${event.type} player is ${event.state}`);
      if (event.type === 'video' && event.state === 'PLAYING') {
        // dismiss the remote user UI placeholder
      } else if (event.type === 'video' && event.state === 'STOPPPED') {
        // show the remote user UI placeholder
      }
    });

    try {
      this.localStream_.play('local') // 在id为 local 的 div 容器上播放本地音视频
    } catch (e) {
    }

    // publish local stream by default after join the room
    await this.publish();
    console.log('发布本地流成功！')
  }

  async leave() {
    if (!this.isJoined_) {
      console.warn('leave() - leave without join()d observed');
      return;
    }

    if (this.isPublished_) {
      // ensure the local stream has been unpublished before leaving.
      await this.unpublish(true);
    }

    try {
      // leave the room
      await this.client_.leave();
      this.isJoined_ = false;
    } catch (error) {
      location.reload();
    } finally {
      // 停止本地流，关闭本地流内部的音视频播放器
        this.localStream_.stop();
        this.localStream_.close();
        this.localStream_ = null;
      // 关闭本地流，释放摄像头和麦克风访问权限
    }
  }

  async publish() {
    if (!this.isJoined_) {
      console.warn('publish() - please join() firstly');
      return;
    }
    if (this.isPublished_) {
      console.warn('duplicate RtcClient.publish() observed');
      return;
    }
    try {
      // 发布本地流
      await this.client_.publish(this.localStream_);
      this.isPublished_ = true;
    } catch (error) {
      this.isPublished_ = false;
    }
  }

  async unpublish(isLeaving) {
    if (!this.isJoined_) {
      console.warn('unpublish() - please join() firstly');
      return;
    }
    if (!this.isPublished_) {
      console.warn('RtcClient.unpublish() called but not published yet');
      return;
    }

    try {
      // 停止发布本地流
      await this.client_.unpublish(this.localStream_);
      this.isPublished_ = false;
    } catch (error) {
      if (!isLeaving) {
        console.warn('leaving the room because unpublish failure observed');
        this.leave();
      }
    }
  }

  muteLocalAudio() {
    this.localStream_.muteAudio();
  }

  unmuteLocalAudio() {
    this.localStream_.unmuteAudio();
  }

  muteLocalVideo() {
    this.localStream_.muteVideo();
  }

  unmuteLocalVideo() {
    this.localStream_.unmuteVideo();
  }

  async createLocalStream(options) {
    this.localStream_ = TRTC.createStream({
      audio: options.audio, // 采集麦克风
      video: options.video, // 采集摄像头
      userId: this.userId_
      // cameraId: getCameraId(),
      // microphoneId: getMicrophoneId()
    });
    // 设置视频分辨率帧率和码率
    this.localStream_.setVideoProfile('480p');

    await this.localStream_.initialize();
  }

  handleEvents() {
    // 处理 client 错误事件，错误均为不可恢复错误，建议提示用户后刷新页面
    this.client_.on('error', () => {
      // alert(err);
      // location.reload();
    });

    // 处理用户被踢事件，通常是因为房间内有同名用户引起，这种问题一般是应用层逻辑错误引起的
    // 应用层请尽量使用不同用户ID进房
    this.client_.on('client-banned', () => {
      // location.reload();
    });

    // 远端用户进房通知 - 仅限主动推流用户
    this.client_.on('peer-join', evt => {
      const userId = evt.userId;
      console.log('peer-join ' + userId);
    });
    // 远端用户退房通知 - 仅限主动推流用户
    this.client_.on('peer-leave', evt => {
      const userId = evt.userId;
      window.dispatchEvent(new Event('leave'));
      console.log('peer-leave ' + userId);
    });

    // 处理远端流增加事件
    this.client_.on('stream-added', evt => {
      const remoteStream = evt.stream;
      const id = remoteStream.getId();
      const userId = remoteStream.getUserId();
      // 远端流默认已订阅所有音视频，此处可指定只订阅音频或者音视频，不能仅订阅视频。
      // 如果不想观看该路远端流，可调用 this.client_.unsubscribe(remoteStream) 取消订阅
      this.client_.subscribe(remoteStream);
    });

    // 远端流订阅成功事件
    this.client_.on('stream-subscribed', evt => {
      const remoteStream = evt.stream;
      const id = remoteStream.getId();
      this.remoteStreams_.push(remoteStream);
      try {
        document.getElementsByName('remote')[0].setAttribute('id', id);
        remoteStream.play(id); // 在指定的 div 容器上播放音视频
      } catch(e) {
      }
      console.log('stream-subscribed ID: ', id);
    });

    // 处理远端流被删除事件
    this.client_.on('stream-removed', evt => {
      const remoteStream = evt.stream;
      const id = remoteStream.getId();
      // 关闭远端流内部的音视频播放器
      remoteStream.stop();
      this.remoteStreams_ = this.remoteStreams_.filter(stream => {
        return stream.getId() !== id;
      });
      console.log(`stream-removed ID: ${id}  type: ${remoteStream.getType()}`);
    });

    // 处理远端流更新事件，在音视频通话过程中，远端流音频或视频可能会有更新
    this.client_.on('stream-updated', evt => {
      const remoteStream = evt.stream;
      console.log(
        'type: ' +
        remoteStream.getType() +
        ' stream-updated hasAudio: ' +
        remoteStream.hasAudio() +
        ' hasVideo: ' +
        remoteStream.hasVideo()
      );
    });

    // 远端流音频或视频mute状态通知
    this.client_.on('mute-audio', evt => {
      console.log(evt.userId + ' mute audio');
    });
    this.client_.on('unmute-audio', evt => {
      console.log(evt.userId + ' unmute audio');
    });
    this.client_.on('mute-video', evt => {
      console.log(evt.userId + ' mute video');
    });
    this.client_.on('unmute-video', evt => {
      console.log(evt.userId + ' unmute video');
    });

    // 信令通道连接状态通知
    this.client_.on('connection-state-changed', evt => {
      console.log(`RtcClient state changed to ${evt.state} from ${evt.prevState}`);
    });
  }
}

export default RtcClient