export class SrsRTC {
    constructor(url){
        this.pc = new RTCPeerConnection(null);
        this.stream = new MediaStream();
        this.url = url;
        this.pc.ontrack =  (event) => {
            // https://webrtc.org/getting-started/remote-streams
            console.log('event',event.track)
            if(this.stream){
                this.stream.addTrack(event.track);
            }
     
       
        };

    }
 
    async getVideo(clipUrl){
        this.pc.addTransceiver("video", {direction: "recvonly"});

        const serverApi ='https://demo-kms.4dage.com:443/rtc/v1/play/';
        const tid = Number(parseInt(new Date().getTime()*Math.random()*100)).toString(16).slice(0, 7);
        var offer = await this.pc.createOffer();
        await this.pc.setLocalDescription(offer);
        const session = await new Promise(function(resolve, reject) {
            // @see https://github.com/rtcdn/rtcdn-draft
            var data = {
                api: serverApi,
                tid: tid,
                streamurl: clipUrl,
                clientip: null, 
                sdp: offer.sdp
            };

            console.log("Generated offer: ", data);

            $.ajax({
                type: "POST", url: serverApi, data: JSON.stringify(data),
                contentType:'application/json', dataType: 'json'
            }).done(function(data) {
                console.log("Got answer: ", data);
                if (data.code) {
                    reject(data); return;
                }

                resolve(data);
            }).fail(function(reason){
                reject(reason);
            });
        });
        await this.pc.setRemoteDescription(
            new RTCSessionDescription({type: 'answer', sdp: session.sdp})
        );
        
    
        return session;
        
    }
}