<!doctype html>
<html>
    <head>
        <meta charset="utf-8">
        <title>Testing video exchange using setDirection with renegotiation from offerer to receiver</title>
        <script src="../resources/testharness.js"></script>
        <script src="../resources/testharnessreport.js"></script>
    </head>
    <body>
        <video id="video" autoplay=""></video>
        <canvas id="canvas" width="640" height="480"></canvas>
        <script src ="routines.js"></script>
        <script>
video = document.getElementById("video");
canvas = document.getElementById("canvas");

function grabFrameData(x, y, w, h)
{
    canvas.width = video.videoWidth;
    canvas.height = video.videoHeight;

    canvas.getContext('2d').drawImage(video, x, y, w, h, x, y, w, h);
    return canvas.getContext('2d').getImageData(x, y, w, h).data;
}

function testImage()
{
    const data = grabFrameData(10, 325, 250, 1);

    var index = 20;
    assert_true(data[index] < 100);
    assert_true(data[index + 1] < 100);
    assert_true(data[index + 2] < 100);

    index = 80;
    assert_true(data[index] > 200);
    assert_true(data[index + 1] > 200);
    assert_true(data[index + 2] > 200);

    index += 80;
    assert_true(data[index] > 200);
    assert_true(data[index + 1] > 200);
    assert_true(data[index + 2] < 100);
}

var pc1, pc2;
async function renegotiate()
{
    let d = await pc1.createOffer();
    await pc1.setLocalDescription(d);
    await pc2.setRemoteDescription(d);
    d = await pc2.createAnswer();
    await pc1.setRemoteDescription(d);
    await pc2.setLocalDescription(d);
}

promise_test(async (t) => {
    if (window.testRunner)
        testRunner.setUserMediaPermission(true);

    const localStream = await navigator.mediaDevices.getUserMedia({video: true});
    const stream = await new Promise((resolve, reject) => {
        createConnections((firstConnection) => {
            pc1 = firstConnection;
            firstConnection.addTrack(localStream.getVideoTracks()[0], localStream);
        }, (secondConnection) => {
            pc2 = secondConnection;
            secondConnection.ontrack = (trackEvent) => { resolve(trackEvent.streams[0]); };
        });
        setTimeout(() => reject("Test timed out"), 5000);
    });

    video.srcObject = stream;
    await video.play();

    testImage();

    let promise = new Promise((resolve) => {
        pc2.getReceivers()[0].track.onmute = resolve;
    });

    pc1.getTransceivers()[0].direction = "inactive";
    await renegotiate();
    await promise;

    promise = new Promise((resolve) => {
        pc2.getReceivers()[0].track.onunmute = resolve;
    });

    pc1.getTransceivers()[0].direction = "sendrecv";
    const streamPromise = new Promise(resolve => {
        pc2.ontrack = (trackEvent) => { resolve (trackEvent.streams[0]); };
    });

    await renegotiate();
    video.srcObject = await streamPromise;
    await promise;

    test(() => {
        assert_equals(stream, video.srcObject);
    }, "The MediaStream should remain the same");
    await video.play();

    testImage();
}, "Going from sendrecv to inactive and back to sendrecv");
        </script>
    </body>
</html>