/**
 * @licstart  The following is the entire license notice for the 
 *  JavaScript code in this page.
 *
 * Copyright (C) 2015  Alicia ( https://ion.nu/ )
 *
 * The JavaScript code in this page is free software: you can
 * redistribute it and/or modify it under the terms of the GNU
 * Affero General Public License (GNU AGPL) as published by the Free Software
 * Foundation, version 3 of the License.
 * The code is distributed WITHOUT ANY WARRANTY;
 * without even the implied warranty of MERCHANTABILITY or FITNESS
 * FOR A PARTICULAR PURPOSE.  See the GNU AGPL for more details.
 *
 * As additional permission under GNU AGPL version 3 section 7, you
 * may distribute non-source (e.g., minimized or compacted) forms of
 * that code without the copy of the GNU AGPL normally required by
 * section 4, provided you include this license notice and a URL
 * through which recipients can access the Corresponding Source.
 *
 * @licend  The above is the entire license notice
 * for the JavaScript code in this page.
 */
var cams=new Array();
var mycam;
var broadcasting=false;
var broadcaststream;
var mediarec;
var usermediaerror;
function broadcast()
{
  if(!window.MediaRecorder)
  {
    // Check useragent and if it's chrome, suggest enabling "experimental web platform features", if it's not firefox, suggest trying that, if it is firefox, suggest upgrading
    if(navigator.userAgent.indexOf(' Chrome/')>-1)
    {
      chatnote("MediaRecorder API is not available in your browser, cannot broadcast. Enabling \"Experimental web platform features\" in chrome://flags might enable it.");
    }else if(navigator.userAgent.indexOf(' Firefox/')==-1)
    {
      chatnote("MediaRecorder API is not available in your browser, cannot broadcast. Firefox provides this API, as does Chrome if you enable \"Experimental web platform features\".");
    }else{
      chatnote("MediaRecorder API is not available in your browser, cannot broadcast");
    }
    return;
  }
  if(!broadcasting)
  {
// TODO: Try to constrain video to a low enough resolution for shit connections
    navigator.getUserMedia({video:true, audio:true}, broadcast_success, function(e){alert('getUserMedia failed (is your camera connected?)'); usermediaerror=e;});
  }else{
    broadcasting=false;
    clearInterval(mycam.interval);
    broadcaststream.stop();
    document.getElementById('broadcastbutton').textContent='Broadcast';
    document.getElementById('cams').removeChild(mycam.video);
    var index=cams.indexOf(mycam);
    if(index>-1){cams.splice(index,1);}
    mycam=undefined;
    // TODO: check that a video isn't playing
    if(cams.length==0){hidecams();}
    connection.send('mediastop');
  }
}
function broadcast_success(stream)
{
  broadcasting=1;
  document.getElementById('broadcastbutton').textContent='Stop broadcasting';
  connection.send('mediastart');
  broadcaststream=stream;
  showcams();
  mycam=new Object();
  mycam.video=document.createElement('video');
  mycam.video.autoplay=true;
  mycam.video.mozSrcObject=stream;
  mycam.video.src=window.URL.createObjectURL(stream);
  mycam.video.style.height='100%';
  mycam.video.muted=true; // Don't echo ourselves
  document.getElementById('cams').appendChild(mycam.video);
  cams.push(mycam);
  // Streaming to the server
  mediarec=new MediaRecorder(stream);
  mediarec.ondataavailable=function(data)
  {
    if(data.data.size==0){return;} // Don't send 0-byte data
    connection.send('media');
    connection.send(data.data);
  };
  mediarec.start();
  mycam.interval=setInterval(function(){mediarec.requestData();}, 100);
}
function opencam(user)
{
  var cam=new Object();
  cam.user=user;
  cam.video=document.createElement('video');
  cam.video.autoplay=true;
  cam.video.style.height='100%';
  cam.video.poster='mic.png';
  cam.sourcebuffer=false;
  if(!window.MediaSource)
  {
    chatnote('MediaSource missing, using httpcam fallback');
    connection.send("httpcamkey:"+user.nickname);
  }else{
    cam.mediasource=new MediaSource();
    cam.mediasource.addEventListener('sourceopen', function()
    {
      if(!cam.sourcebuffer){cam.sourcebuffer=this.addSourceBuffer('video/webm');}
    });
    cam.video.src=window.URL.createObjectURL(cam.mediasource);
    cam.filereader=new FileReader();
    cam.filereader.onloadend=function(progress)
    {
      cam.sourcebuffer.appendBuffer(this.result);
      if(!cam.video.played.length)
      {
        cam.video.play();
      }
      cam.video.currentTime+=3600;
    }
    connection.send('mediasubscribe:'+user.nickname);
  }
  cam.cambox=document.createElement('div');
  cam.cambox.className='cambox';
  var info=document.createElement('span');
  info.textContent=user.nickname;
  info.oncontextmenu=function(e){usermenu(user, e.pageX, e.pageY);return false;};
  cam.cambox.appendChild(cam.video);
  cam.cambox.appendChild(info);
  document.getElementById('cams').appendChild(cam.cambox);
  cams.push(cam);
  showcams();
}
function handlecamdata(user, data)
{
  var i=0;
  while(i<cams.length)
  {
    if(cams[i].user==user)
    {
      cams[i].filereader.readAsArrayBuffer(data);
      return;
    }
  }
}
function closecam(user)
{
  var cam=false;
  var i=0;
  while(i<cams.length)
  {
    if(cams[i].user==user){cam=cams[i]; break;}
    ++i;
  }
  if(!cam){return;}
  document.getElementById('cams').removeChild(cam.cambox);
  cam.cambox.removeChild(cam.video);
  cams.splice(cams.indexOf(cam), 1);
  // TODO: check that a video isn't playing
  if(cams.length==0){hidecams();}
//  connection.send('mediaunsubscribe:'+cam.user.username); (probably do this from elsewhere)
}
function showcams()
{
  var div=document.getElementById('chat');
  div.style.height='40%';
  div=document.getElementById('userlist');
  div.style.height='40%';
  div=document.getElementById('cams');
  div.style.display='inline-block';
}
function hidecams()
{
  var div=document.getElementById('cams');
  div.style.display='none';
  div=document.getElementById('chat');
  setheightcalc(div, '100% - 30px');
  div=document.getElementById('userlist');
  setheightcalc(div, '100% - 30px');
}
// Compatibility...
if(navigator.getUserMedia){}
else if(navigator.webkitGetUserMedia){navigator.getUserMedia=navigator.webkitGetUserMedia;}
else if(navigator.mozGetUserMedia){navigator.getUserMedia=navigator.mozGetUserMedia;}
else if(navigator.msGetUserMedia){navigator.getUserMedia=navigator.msGetUserMedia;}