<!DOCTYPE html>
<html>
<head>
    <title>mock-media-source</title>
    <script src="mock-media-source.js"></script>
    <script src="../video-test.js"></script>
    <script>
    var source;
    var sourceBuffer;
    var initSegment;
    var exception;

    function bufferedRanges() {
        var bufferedRanges = '[ ';
        var timeRanges = sourceBuffer.buffered;
        for (var i = 0 ; i < timeRanges.length ; i++) {
            if (i)
                bufferedRanges += ', ';
            bufferedRanges += timeRanges.start(i) + '...' + timeRanges.end(i);
        }
        bufferedRanges += ' ]';
        return bufferedRanges;
    }

    async function appendPtsRange(firstPts, lastPts) {
        var resultException = null;
        for (var pts = firstPts; pts <= lastPts; pts++) {
            try {
                consoleWrite('Appending PTS='+pts);
                sourceBuffer.appendBuffer(makeASample(pts, pts, 1, 1, 1, SAMPLE_FLAG.SYNC, 1));
                await waitFor(sourceBuffer, 'updateend');
            } catch (e) {
                resultException = e;
                sourceBuffer.abort();
                break;
            }
        }
        return resultException;
    }

    if (window.internals)
        internals.initializeMockMediaSource();

    window.addEventListener('load', async() => {
        findMediaElement();
        source = new MediaSource();

        const videoSource = document.createElement('source');
        videoSource.type = 'video/mock; codecs=mock';
        videoSource.src = URL.createObjectURL(source);
        video.appendChild(videoSource);

        await waitFor(source, 'sourceopen');
        sourceBuffer = source.addSourceBuffer("video/mock; codecs=mock");
        initSegment = makeAInit(-1, [makeATrack(1, 'mock', TRACK_KIND.VIDEO)]);
        sourceBuffer.appendBuffer(initSegment);
        await waitFor(sourceBuffer, 'updateend');

        testExpected('isNaN(source.duration)', true, '==');

        // This should allow bufering up to 177 (empirically tested).
        internals.settings.setMaximumSourceBufferSize(3000);

        exception = await appendPtsRange(120, 176);

        video.currentTime = 175;
        testExpected('video.currentTime', 175, '==');

        testExpected('bufferedRanges()', '[ 120...132, 162...177 ]', '==');

        video.currentTime = 115;
        testExpected('video.currentTime', 115, '==');
        await appendPtsRange(109, 119);
        testExpected('bufferedRanges()', '[ 109...132, 162...177 ]', '==');
        endTest();
     });
    </script>
</head>
<body>
    This tests rewind seeks in a live stream. The sample eviction algorithm should attempt to remove
    some samples without going into an infinite loop.
    <video></video>
</body>
</html>