//Get the Medooze Media Server interface
const MediaServer = require("medooze-media-server");

//Get Semantic SDP objects
const SemanticSDP	= require("semantic-sdp");
const SDPInfo		= SemanticSDP.SDPInfo;
const MediaInfo		= SemanticSDP.MediaInfo;
const CandidateInfo	= SemanticSDP.CandidateInfo;
const DTLSInfo		= SemanticSDP.DTLSInfo;
const ICEInfo		= SemanticSDP.ICEInfo;
const StreamInfo	= SemanticSDP.StreamInfo;
const TrackInfo		= SemanticSDP.TrackInfo;
const Direction		= SemanticSDP.Direction;
const CodecInfo		= SemanticSDP.CodecInfo;

const Capabilities = {
	data : {
		
	}
};

module.exports = function(request,protocol,endpoint)
{
	const connection = request.accept(protocol);

	connection.on('message', (frame) =>
	{
		//Get cmd
		var msg = JSON.parse(frame.utf8Data);

		//Get cmd
		if (msg.cmd==="OFFER")
		{
			//Process the sdp
			var offer = SDPInfo.process(msg.offer);

			//Create an DTLS ICE transport in that enpoint
			const transport = endpoint.createTransport(offer);

			//transport.dump("/tmp/svc.pcap");

			//Set RTP remote properties
			 transport.setRemoteProperties({
				audio : offer.getMedia("audio"),
				video : offer.getMedia("video")
			});

			//Create local SDP info
			const answer = offer.answer({
				dtls		: transport.getLocalDTLSInfo(),
				ice		: transport.getLocalICEInfo(),
				candidates	: endpoint.getLocalCandidates(),
				capabilities	: Capabilities
			});

			//Set RTP local  properties
			transport.setLocalProperties({
				video : answer.getMedia("video")
			});

			//Get offered stream info
			//Send response
			connection.sendUTF(JSON.stringify({
				answer : answer.toString()
			}));

			//Close on disconnect
			connection.on("close",() => {
				//Stop
				transport.stop();
			});
		}
	});
};