function formatFrames(seconds) {
    var npt = Ox.formatDuration(seconds, 3);
    var dotpos = npt.lastIndexOf(".");
    var mmStr = npt.substring(dotpos + 1, npt.length);
    var mmInt = parseInt(mmStr);
    var frames = parseInt((mmInt / 1000) * 24);
    var framesTc = '';
    var joinToken = ":";
    var framesTc = npt.substring(0, dotpos ) + joinToken + frames;
    return framesTc;
}

function isValidTimecode(tc) {
  var tc = $.trim(tc);
  var nptRegex = new RegExp("^[0-9][0-9]?\:[0-9][0-9]\:[0-9][0-9][\.|\,|\:][0-9]?[0-9]?[0-9]?$");
  return nptRegex.test(tc);
}

function getFileNameSansExt(filename) {
  var dotPos = filename.lastIndexOf(".");
  if (dotPos != '-1') {
    var filenameSansExt = filename.substring(0, dotPos);
  } else {
    var filenameSansExt = filename;
  }
  return filenameSansExt;
}

function cleanNewlines(str) {
    var s = str.replace(/\r\n|\r|\n/g, '\n');
    return s;
}

function formatEnc(data) {
    var r = '', n = 1;
    data.forEach(function(item) {
        r += n + ' ' + formatFrames(item['in']) + ' ' + formatFrames(item.out) + ' ' + item.text;
        r += '\n\n';
        n++;
    });
    return r;
}

function spansToSrt(arr, fmt, start_no) {
    if (typeof start_no == 'undefined') {
        start_no = 1;
        }
    var srt = [];
    arr.forEach(function(s) {
        if (s.text.trim() == '') {
        } else {
            var text = s.text.trim();
            linebreaksRegex = new RegExp('\n+', "g")
            text = text.replace(linebreaksRegex, "\n");
            if (!s.tcOutMs) {
                s.tcOutMs = Video.player.duration;
            }
            srt.push({
                'in': s.tcInMs,
                out: s.tcOutMs,
                text: text
            });
        }
    });
    if (fmt == 'srt') {
        return Ox.formatSRT(srt);
    } else if (fmt == 'enc') {
        return formatEnc(srt);
    }
    return srt;
}

function loadCuts(url, id) {
    function pandora_api(action, data, callback) {
        $.ajax({
            type: "POST",
            url: url,
            data: {action: action, data: JSON.stringify(data)},
            success: callback,
            dataType: 'json'
        });
    }
    pandora_api('get', {id: id, keys: ['cuts']}, function(result) {
        var txt = '';
        result.data.cuts.forEach(function(cut) {
            textArea.insertTc(Ox.formatDuration(cut));
        });
    });
}

function loadSrt(file) {
    var reader = new FileReader();
    reader.onload = function(data) {
        textArea.fromSrt(data.target.result);
    };
    reader.readAsText(file);
}