/* global RTCPeerConnection */


//
// Container for this sample
//

var appContainer = document.body;
appContainer.innerHTML = "";

//
// Sample getUserMedia
//

// 
var localStream, localVideoEl;
function TestGetUserMedia() {
  localVideoEl = document.createElement('video');
  localVideoEl.style.height = "50vh";
  localVideoEl.setAttribute('autoplay', 'autoplay');
  localVideoEl.setAttribute('playsinline', 'playsinline');
  appContainer.appendChild(localVideoEl);

  return navigator.mediaDevices.getUserMedia({
    video: true,
    audio: true
    // Note: Use navigator.mediaDevices.enumerateDevices() Promise to get deviceIds
    /*
    video: {
      // Test Back Camera
      //deviceId: 'com.apple.avfoundation.avcapturedevice.built-in_video:0'
      //sourceId: 'com.apple.avfoundation.avcapturedevice.built-in_video:0'
      deviceId: {
        exact: 'com.apple.avfoundation.avcapturedevice.built-in_video:0'
      }
      // Test FrameRate
      frameRate:{ min: 15.0, max: 30.0 } // Note: Back camera may only support max 30 fps
    }, 
    audio: {
      deviceId: {
        exact: 'Built-In Microphone'
      }
    }*/
  }).then(function (stream) {

    console.log('getUserMedia.stream', stream);
    console.log('getUserMedia.stream.getTracks', stream.getTracks());

    // Note: Expose for debug
    localStream = stream;

    // Attach local stream to video element
    localVideoEl.srcObject = localStream;

    return localStream;
   
  }).catch(function (err) {
    console.log('getUserMedia.error', err, err.stack);
  });
}

//
// Sample RTCPeerConnection
// 

var pc1, pc2;

var peerConnectionConfig = {
    offerToReceiveVideo: true,
    offerToReceiveAudio: true,
    //iceTransportPolicy: 'relay',
    sdpSemantics: 'unified-plan',
    //sdpSemantics: 'plan-b',
    bundlePolicy: 'max-compat',
    rtcpMuxPolicy: 'negotiate',
    iceServers: [
      {
         urls: ["stun:stun.stunprotocol.org"]
      }
    ]
};

// This plugin handle 'addstream' and 'track' event for MediaStream creation.
var useTrackEvent = Object.getOwnPropertyDescriptors(RTCPeerConnection.prototype).ontrack;

var peerVideoEl, peerStream;
function TestRTCPeerConnection(localStream) {

  pc1 = new RTCPeerConnection(peerConnectionConfig);
  pc2 = new RTCPeerConnection(peerConnectionConfig);
  
  if (useTrackEvent) {
     
    // Add local stream tracks to RTCPeerConnection
    var localPeerStream = new MediaStream();
    localStream.getTracks().forEach(function (track) {
      console.log('pc1.addTrack', track, localPeerStream);
      pc1.addTrack(track, localPeerStream);
    });
        
  // Note: Deprecated but supported    
  } else {
     pc1.addStream(localStream);

     // Note: Deprecated Test removeStream
     // pc1.removeStream(pc1.getLocalStreams()[0]);<
  }

  // Basic RTCPeerConnection Local WebRTC Signaling follow.
  function onAddIceCandidate(pc, can) {
    console.log('addIceCandidate', pc, can);
    return can && pc.addIceCandidate(can).catch(function (err) {
      console.log('addIceCandidateError', err);
    });
  }

  pc1.addEventListener('icecandidate', function (e) {
    onAddIceCandidate(pc2, e.candidate);
  });
  
  pc2.addEventListener('icecandidate', function (e) {
    onAddIceCandidate(pc1, e.candidate);
  });

  function setPeerVideoStream(stream) {

    // Create peer video element
    peerVideoEl = document.createElement('video');
    peerVideoEl.style.height = "50vh";
    peerVideoEl.setAttribute('autoplay', 'autoplay');
    peerVideoEl.setAttribute('playsinline', 'playsinline');
    appContainer.appendChild(peerVideoEl);

    // Note: Expose for debug
    peerStream = stream;

    // Attach peer stream to video element
    peerVideoEl.srcObject = peerStream;
  }

  if (useTrackEvent) {
    var newPeerStream;
    pc2.addEventListener('track', function(e) {
      console.log('pc2.track', e);
      newPeerStream = e.streams[0] || newPeerStream || new MediaStream();
      setPeerVideoStream(newPeerStream);
      newPeerStream.addTrack(e.track);   
    });
	
  // Note: Deprecated but supported    
  } else {
    pc2.addEventListener('addstream', function(e) {
      console.log('pc2.addStream', e);
      setPeerVideoStream(e.stream);
    });
  }

  pc1.addEventListener('iceconnectionstatechange', function (e) {
    console.log('pc1.iceConnectionState', e, pc1.iceConnectionState);

    if (pc1.iceConnectionState === 'completed') {      
      console.log('pc1.getSenders', pc1.getSenders());
      console.log('pc2.getReceivers', pc2.getReceivers());
    }
  });

  pc1.addEventListener('icegatheringstatechange', function (e) {
    console.log('pc1.iceGatheringStateChange', e);
  });

  pc1.addEventListener('negotiationneeded', function (e) {
    console.log('pc1.negotiatioNeeded', e);

    return pc1.createOffer().then(function (d) {
      var desc = {
        type: d.type,
        sdp: d.sdp
      };
      console.log('pc1.setLocalDescription', desc);
      return pc1.setLocalDescription(desc);
    }).then(function () {
      var desc = {
        type: pc1.localDescription.type,
        sdp: pc1.localDescription.sdp
      };
      console.log('pc2.setLocalDescription', desc);
      return pc2.setRemoteDescription(desc);
    }).then(function () {
      console.log('pc2.createAnswer');
      return pc2.createAnswer();
    }).then(function (d) {
      var desc = {
        type: d.type,
        sdp: d.sdp
      };
      console.log('pc2.setLocalDescription', desc);
      return pc2.setLocalDescription(d);
    }).then(function () {
      var desc = {
        type: pc2.localDescription.type,
        sdp: pc2.localDescription.sdp
      };
      console.log('pc1.setRemoteDescription', desc);
      return pc1.setRemoteDescription(desc);
    }).catch(function (err) {
      console.log('pc1.createOffer.error', err);
    });
  });
}

function TestRTCPeerConnectionLocal() {
    
  // Note: This allow this sample to run on any Browser
  var cordova = window.cordova;
  if (cordova && cordova.plugins && cordova.plugins.iosrtc) {

    // Expose WebRTC and GetUserMedia SHIM as Globals (Optional)
    // Alternatively WebRTC API will be inside cordova.plugins.iosrtc namespace
    cordova.plugins.iosrtc.registerGlobals();

    // Enable iosrtc debug (Optional)
    cordova.plugins.iosrtc.debug.enable('*', true);
  }

  // Run sample
  TestGetUserMedia().then(function (localStream) {
    TestRTCPeerConnection(localStream); 
  });
}

if (document.readyState === "complete" || document.readyState === "loaded") {
  TestRTCPeerConnectionLocal();
} else {
  window.addEventListener("DOMContentLoaded", TestRTCPeerConnectionLocal);  
}

// See ./extra/renderer-and-libwebrtc-tests.js for more samples usage.

// Just for Cordova apps.
document.addEventListener('deviceready', function () {
  // Just for iOS devices.
  if (window.device.platform === 'iOS') {
    cordova.plugins.iosrtc.registerGlobals();

    // load adapter.js
    var adapterVersion = 'latest';
    var script = document.createElement("script");
    script.type = "text/javascript";
    script.src = "https://webrtc.github.io/adapter/adapter-" + adapterVersion + ".js";
    script.async = false;
    document.getElementsByTagName("head")[0].appendChild(script);
  }
});