// Probe for supported codecs
AUDIO_CODECS = [
    'audio/ogg',
    'audio/mpeg',
    'audio/flac',
];

timeout = null;
es = null;
prev = null;

function humanize_duration(d) {
    var seconds = Math.floor(d % 60);
    var minutes = Math.floor(d / 60) % 60;
    var hours = Math.floor(d / 3600);
    if (seconds < 10) seconds = '0' + seconds;
    if (minutes < 10) minutes = '0' + minutes;
    if (hours < 10) hours = '0' + hours;
    return hours + ":" + minutes + ":" + seconds;
}

function onDelayedSearch() {
    var expr = $("#search").val();
    if (expr == window.expr) return;
    console.info("Searching", expr);
    results.rows().clear().draw(false);
    if (es) {
        es.close();
        $("#results tbody").empty();
    }

    es = new EventSource("/api/search/?expr=" + expr);

    // Close socket event listener
    es.addEventListener("close", function(e) {
        console.info("Closing search socket");
    });

    // Open socket event listener
    es.addEventListener("open", function(e) {
	console.info("Opened event stream for search expression", expr);
    })

    // Search end result marker
    es.addEventListener("done", function(e) {
	var totals = JSON.parse(e.data)
        console.info("Finished searching, total", totals.relevant_files, "relevant files and", totals.hits, "hits");
        es.close();
    })

    // Keep track of relative path of the XSPF blobs
    es.addEventListener("chdir", function(e) {
        console.info("Moving to directory:", e.data);
        window.relpath = e.data;

    })

    // If XSPF blob is received append it to search results
    es.addEventListener("xspf", function(e) {
        var $trackMetadatas = $("playlist trackList track", $.parseXML(e.data));
        $trackMetadatas.each(function(index, element) {

            var location = element.getElementsByTagName("location")[0];
            var filename = location.innerHTML;

            // Decode escaped XML
            var filename = decodeURIComponent(location.innerHTML);
            if (filename.indexOf("/") >= 0) {
                filename = filename.substring(filename.lastIndexOf("/") + 1);
            }

            // Escape quotes for jQuery
            filename = filename.replace("\"", "\\\"");
            results.row.add([
                window.relpath + "/" + filename,
                $("creator", element).html() || "-",
                $("album", element).html() || "-",
                $("trackNum", element).html() || "-",
                $("title", element).html() || "-",
                humanize_duration(parseInt($("duration", element).html())/1000),
                $("meta[rel='mimetype']", element).html(),
                Math.floor(parseInt($("meta[rel='bitrate']", element).html())/1000)+"kbps",
//                $("meta[rel='bit_depth']", element).html() + "bit @ " + $("meta[rel='sample_rate']", element).html(),
                "bla"
            ]).on('click', 'tr', function () {
                $(this).toggleClass('selected');
            });
            clearTimeout(window.timeoutDraw);
            window.timeoutDraw = setTimeout(results.draw, 100);
        });
    });
}

function playNextAudioTrack() {
    queue.row(queue.row({selected:true}).index()+1).select();
}


function playPrevAudioTrack() {
    queue.row(queue.row({selected:true}).index()-1).select();
}


function playTrack(url, mimetype) {
    var url = "/api/stream/" + url;
    console.info("Playing:", url, mimetype);

    $("#seek").val(0);
    $("#offset").html("00:00:00");
    $("#player").unbind("ended").bind("ended", function () {
        playNextAudioTrack();
    });
    $("#player").empty();

    if (window.AUDIO_CODECS_SUPPORTED.indexOf(mimetype) >= 0) {
        $("#player").append("<source src=\"" + url + "\" type=\"" + mimetype + "\"/>");
    } else {
        console.info("Codec", mimetype, "not supported by browser");
    }

    for (var j = 0; j < window.AUDIO_CODECS_SUPPORTED.length; j++) {
        var alternative = window.AUDIO_CODECS_SUPPORTED[j];
        if (mimetype != alternative) {
            $("#player").append("<source src=\"/transcode/?mimetype=" + alternative + "&url=" + url.replace("&", "%26") + "\" type=\"" + alternative + "\"/>");
        }
    }
    $("#player").trigger("load");
    $("#player").trigger("play");
}

$(document).ready(function() {
    $('#results tbody').on('dblclick', 'tr', function () {
        console.info("Got double click");
        queue.rows.add(results.rows({ selected: true }).data());
        queue.rows.add([results.row(this).data()]);
        results.rows().deselect();
        results.draw(false);
        queue.draw(false);
    });

    $("#playback-next").on("click", function() {
        playNextAudioTrack();
    });
    $("#playback-prev").on("click", function() {
        playPrevAudioTrack();
    });
    $("#queue-selection").on("click", function() {
        queue.rows.add(results.rows({ selected: true }).data()).draw(false);
    });
    $("#queue-all").on("click", function() {
        queue.rows.add(results.data()).draw(false);
    });
    $("#queue thead").html($("#results thead").html());
    $("#queue-clear").on("click", function() {
        queue.rows().clear().draw(false);
    });

    window.results = $('#results').DataTable({
        autoWidth: false,
        columns: [
            null,
            {width:"20%"},
            {width:"20%"},
            {width:"1em"},
            {width:"20%"},
        ],

        paging: true,
        ordering: false,
        searching: false,
        select:  {
            style: 'multi'
        },
        columnDefs: [
            {
                "targets": [ 0, 6, 7, 8 ],
                "visible": false,
                "searchable": false
            },
        ]
    });
    window.queue = $('#queue').DataTable({
        autoWidth: false,
        columns: [
            null,
            {width:"20%"},
            {width:"20%"},
            {width:"1em"},
            {width:"20%"},
        ],
        paging: true,
        ordering: false,
        searching: false,
        select:  {
            style: 'single'
        },
        columnDefs: [
            {
                "targets": [ 0, 6, 7, 8 ],
                "visible": false,
                "searchable": false
            },
        ],
    }).on("select", function(e, dt, type, indexes) {
        var item = queue.row(indexes).data();
        playTrack(item[0], item[6]);
    });

    window.AUDIO_CODECS_SUPPORTED = [];

    var audioPlayer = document.getElementById("player");
    for (var j = 0; j < window.AUDIO_CODECS.length; j++) {
        if (audioPlayer.canPlayType(window.AUDIO_CODECS[j])) {
            window.AUDIO_CODECS_SUPPORTED.push(AUDIO_CODECS[j]);
        }
    }

    console.info("This browser supports following audio codecs:", window.AUDIO_CODECS_SUPPORTED);
    $("#search").keyup(function() {
        if (prev == $("#search").val())
            return;
        prev = $("#search").val();
        clearTimeout(window.timeout);
        window.timeout = setTimeout(function() {
            onDelayedSearch();
        }, 200);
    });
});