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<!doctype html>
<!--
This test uses data only, and thus does not require fake media devices.
-->

<html>
<head>
  <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
  <title>RTCPeerConnection Data-Only Connection Test with Promises</title>
</head>
<body>
  <div id="log"></div>
  <h2>iceConnectionState info</h2>
  <div id="stateinfo">
  </div>

  <!-- These files are in place when executing on W3C. -->
  <script src="/resources/testharness.js"></script>
  <script src="/resources/testharnessreport.js"></script>
  <script type="text/javascript">
  var test = async_test('Can set up a basic WebRTC call with only data using promises.');

  var gFirstConnection = null;
  var gSecondConnection = null;

  var onIceCandidateToFirst = test.step_func(function(event) {
    // If event.candidate is null = no more candidates.
    if (event.candidate) {
      gSecondConnection.addIceCandidate(event.candidate);
    }
  });

  var onIceCandidateToSecond = test.step_func(function(event) {
    if (event.candidate) {
      gFirstConnection.addIceCandidate(event.candidate);
    }
  });

  var onIceConnectionStateChange = test.step_func(function(event) {
    assert_equals(event.type, 'iceconnectionstatechange');
    var stateinfo = document.getElementById('stateinfo');
    stateinfo.innerHTML = 'First: ' + gFirstConnection.iceConnectionState
                        + '<br>Second: ' + gSecondConnection.iceConnectionState;
    // Note: All these combinations are legal states indicating that the
    // call has connected. All browsers should end up in completed/completed,
    // but as of this moment, we've chosen to terminate the test early.
    // TODO: Revise test to ensure completed/completed is reached.
    if (gFirstConnection.iceConnectionState == 'connected' &&
        gSecondConnection.iceConnectionState == 'connected') {
      test.done()
    }
    if (gFirstConnection.iceConnectionState == 'connected' &&
        gSecondConnection.iceConnectionState == 'completed') {
      test.done()
    }
    if (gFirstConnection.iceConnectionState == 'completed' &&
        gSecondConnection.iceConnectionState == 'connected') {
      test.done()
    }
    if (gFirstConnection.iceConnectionState == 'completed' &&
        gSecondConnection.iceConnectionState == 'completed') {
      test.done()
    }
  });

  // This function starts the test.
  test.step(function() {
    gFirstConnection = new RTCPeerConnection(null);
    gFirstConnection.onicecandidate = onIceCandidateToFirst;
    gFirstConnection.oniceconnectionstatechange = onIceConnectionStateChange;

    gSecondConnection = new RTCPeerConnection(null);
    gSecondConnection.onicecandidate = onIceCandidateToSecond;
    gSecondConnection.oniceconnectionstatechange = onIceConnectionStateChange;

    // The createDataChannel is necessary and sufficient to make
    // sure the ICE connection be attempted.
    gFirstConnection.createDataChannel('channel');

    var atStep = 'Create offer';

    gFirstConnection.createOffer()
    .then(function(offer) {
      atStep = 'Set local description at first';
      return gFirstConnection.setLocalDescription(offer);
    })
    .then(function() {
      atStep = 'Set remote description at second';
      return gSecondConnection.setRemoteDescription(
          gFirstConnection.localDescription);
    })
    .then(function() {
      atStep = 'Create answer';
      return gSecondConnection.createAnswer();
    })
    .then(function(answer) {
      atStep = 'Set local description at second';
      return gSecondConnection.setLocalDescription(answer);
    })
    .then(function() {
      atStep = 'Set remote description at first';
      return gFirstConnection.setRemoteDescription(
          gSecondConnection.localDescription);
    })
    .then(function() {
      atStep = 'Negotiation completed';
    })
    .catch(test.step_func(function(e) {
      assert_unreached('Error ' + e.name + ': ' + e.message +
                       ' happened at step ' + atStep);
    }));
  });
</script>

</body>
</html>