/*
 * (C) Copyright 2014-2015 Kurento (http://kurento.org/)
 *
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the GNU Lesser General Public License
 * (LGPL) version 2.1 which accompanies this distribution, and is available at
 * http://www.gnu.org/licenses/lgpl-2.1.html
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 * Lesser General Public License for more details.
 *
 */

//var ws = new WebSocket('wss://' + location.host + '/one2many');
var video;
var webRtcPeer;
var socket;
var autoView = true;
var room;


function onError(msg){
	console.log(msg);
}

$(function() {
	video = $('#video')[0];

  let url_string = window.location.href;
  let url = new URL(url_string);
  room = url.searchParams.get('r');

  socket = io('https://gto.to/');

	$('#call').on('click', function(e) { presenter(); e.preventDefault(); } );
	$('#viewer').on('click', function(e) { viewer(); e.preventDefault(); } );
	$('#terminate').on('click', function(e) { stop(); e.preventDefault();} );


  socket.on('connect', function(){
    console.log('Connected to socket');

    socket.emit('subscribeToStream', currentRoom());
  });

  socket.on('disconnect', function(){
    console.log('Disconnected from socket');
    dispose();
  });

  socket.on('presenterResponse', function(data) {
    presenterResponse(data);
  });

  socket.on('viewerResponse', function(data) {
    viewerResponse(data);
  });

  socket.on('stopCommunication', function(data) {
    console.log('stopCommunication');
    dispose();
  });

  socket.on('iceCandidate', function(data) {
    webRtcPeer.addIceCandidate(data.candidate)
  });

  socket.on('streamStarted', function(data) {
    if (autoView) {
      viewer();
    }
  });

  socket.on('streamEnded', function(data) {
    dispose();
  });
});

function presenterResponse(message) {
	if (message.response != 'accepted') {
		var errorMsg = message.message ? message.message : 'Unknown error';
		console.warn('Call not accepted for the following reason: ' + errorMsg);
		dispose();
	} else {
		webRtcPeer.processAnswer(message.sdpAnswer);
	}
}

function viewerResponse(message) {
	if (message.response != 'accepted') {
		var errorMsg = message.message ? message.message : 'Unknown error';
		console.warn('Call not accepted for the following reason: ' + errorMsg);
		dispose();
	} else {
		webRtcPeer.processAnswer(message.sdpAnswer);
	}
}

function presenter() {
	if (!webRtcPeer) {
		showSpinner(video);

		var options = {
			localVideo: video,
			onicecandidate : onIceCandidate
	    };

		webRtcPeer = kurentoUtils.WebRtcPeer.WebRtcPeerSendonly(options, function(error) {
			if(error) return onError(error);

			this.generateOffer(onOfferPresenter);
		});
	}
}

function onOfferPresenter(error, offerSdp) {
    if (error) return onError(error);

	var message = {
		sdpOffer : offerSdp,
		room: currentRoom()
	};

	socket.emit('presenter', message);
}

function viewer() {
	autoView = true;
	if (!webRtcPeer) {
		showSpinner(video);

		var options = {
			remoteVideo: video,
			onicecandidate : onIceCandidate
		};

		webRtcPeer = kurentoUtils.WebRtcPeer.WebRtcPeerRecvonly(options, function(error) {
			if(error) return onError(error);

			this.generateOffer(onOfferViewer);
		});
	}
}

function onOfferViewer(error, offerSdp) {
	if (error) return onError(error);

	var message = {
		sdpOffer : offerSdp,
		room: currentRoom()
	};
	socket.emit('viewer', message);
}

function onIceCandidate(candidate) {
	   //console.log('Local candidate' + JSON.stringify(candidate));
	   socket.emit('onIceCandidate', {candidate : candidate});
}

function stop() {
	autoView = false;
	if (webRtcPeer) {
		socket.emit('stop');
		dispose();
	}
}

function dispose() {
	if (webRtcPeer) {
		webRtcPeer.dispose();
		webRtcPeer = null;
	}
	hideSpinner(video);
}

function sendMessage(payload) {
	var event = payload.id,
		message = payload;
	console.log('Sending message - ' + event + ': ', message);

	socket.emit(event, payload);
}

function showSpinner() {
	for (var i = 0; i < arguments.length; i++) {
		arguments[i].poster = './img/transparent-1px.png';
		arguments[i].style.background = 'center transparent url("./img/spinner.gif") no-repeat';
	}
}

function hideSpinner() {
	for (var i = 0; i < arguments.length; i++) {
		arguments[i].src = '';
		arguments[i].poster = './img/foot-logo.png';
		arguments[i].style.background = '';
	}
}

function currentRoom() {
	return room;
}


/**
 * Lightbox utility (to display media pipeline image in a modal dialog)
 */
$(document).delegate('*[data-toggle="lightbox"]', 'click', function(event) {
	event.preventDefault();
	$(this).ekkoLightbox();
});