/* eslint-disable require-jsdoc */

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_ = [];

        // 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() {
        document.getElementById('agora_remote_video').style.height = 409 + 'px';
        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_ });
            this.isJoined_ = true;
        } catch (error) {
            $('#spthWarnWin').hide();
            console.error('failed to join room because: ' + error);
            alert(
                '进房失败原因：' +
                error +
                '\r\n\r\n请确保您的网络连接是正常的，您可以先体验一下我们的Demo以确保网络连接是正常的：' +
                '\r\n https://trtc-1252463788.file.myqcloud.com/web/demo/official-demo/index.html ' +
                '\r\n\r\n另外，请确保您的账号信息是正确的。' +
                '\r\n请打开链接：https://cloud.tencent.com/document/product/647/34342 查询详细错误信息！'
            );
            return;
        }

        try {
            // 采集摄像头和麦克风视频流
            await this.createLocalStream({ audio: true, video: true });
        } catch (error) {
            console.error('createLocalStream with audio/video failed: ' + error);
            /*alert(
                '请确认已连接摄像头和麦克风并授予其访问权限！\r\n\r\n 如果您没有连接摄像头或麦克风，您可以通过调整第60行代码来关闭未连接设备的采集请求！'
            );*/
            showFailureInfo_BigScreen_vido('请确认是否已连接摄像头和麦克风并授予其访问权限！');
            try {
                // fallback to capture camera only
                await this.createLocalStream({ audio: false, video: true });
            } catch (error) {
                console.error('createLocalStream with video failed: ' + error);
                $('#spthWarnWin').hide();
                return;
            }
            $('#spthWarnWin').hide();
        }

        this.localStream_.on('player-state-changed', event => {
            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
            }
        });

        // 在名为 ‘local_stream’ 的 div 容器上播放本地音视频
        this.localStream_.play('agora_remote_video');

        // publish local stream by default after join the room
        await this.publish();
    }

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

    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) {
            console.error('failed to publish local stream ' + 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) {
            console.error('failed to unpublish local stream because ' + error);
            if (!isLeaving) {
                console.warn('leaving the room because unpublish failure observed');
                this.leave();
            }
        }
    }

    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', err => {
            console.error(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', err => {
            console.error('client has been banned for ' + err);
            // 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;
        });
        // 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;
            closeVideoCall();
            // alert('对方已挂断。')
        });

        window.onbeforeunload = function(e) {
            closeVideoCall();
        }

        // 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);
            $('#spth_win').show();
            addViewId(id);
            window.isVideoConnect = true;
            // 在指定的 div 容器上播放音视频
            remoteStream.play(id);
            $('#spthWarnWin').hide();
        });

        // 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;
            });
            removeView(id);
        });

        // 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}`);
        });
    }
}