/*! @name @videojs/vhs-utils @version 1.3.0 @license MIT */
'use strict';

Object.defineProperty(exports, '__esModule', { value: true });

/**
 * Replace the old apple-style `avc1.<dd>.<dd>` codec string with the standard
 * `avc1.<hhhhhh>`
 *
 * @param {string} codec
 *        Codec string to translate
 * @return {string}
 *         The translated codec string
 */
var translateLegacyCodec = function translateLegacyCodec(codec) {
  if (!codec) {
    return codec;
  }

  return codec.replace(/avc1\.(\d+)\.(\d+)/i, function (orig, profile, avcLevel) {
    var profileHex = ('00' + Number(profile).toString(16)).slice(-2);
    var avcLevelHex = ('00' + Number(avcLevel).toString(16)).slice(-2);
    return 'avc1.' + profileHex + '00' + avcLevelHex;
  });
};
/**
 * Replace the old apple-style `avc1.<dd>.<dd>` codec strings with the standard
 * `avc1.<hhhhhh>`
 *
 * @param {string[]} codecs
 *        An array of codec strings to translate
 * @return {string[]}
 *         The translated array of codec strings
 */

var translateLegacyCodecs = function translateLegacyCodecs(codecs) {
  return codecs.map(translateLegacyCodec);
};
/**
 * Replace codecs in the codec string with the old apple-style `avc1.<dd>.<dd>` to the
 * standard `avc1.<hhhhhh>`.
 *
 * @param {string} codecString
 *        The codec string
 * @return {string}
 *         The codec string with old apple-style codecs replaced
 *
 * @private
 */

var mapLegacyAvcCodecs = function mapLegacyAvcCodecs(codecString) {
  return codecString.replace(/avc1\.(\d+)\.(\d+)/i, function (match) {
    return translateLegacyCodecs([match])[0];
  });
};
/**
 * @typedef {Object} ParsedCodecInfo
 * @property {number} codecCount
 *           Number of codecs parsed
 * @property {string} [videoCodec]
 *           Parsed video codec (if found)
 * @property {string} [videoObjectTypeIndicator]
 *           Video object type indicator (if found)
 * @property {string|null} audioProfile
 *           Audio profile
 */

/**
 * Parses a codec string to retrieve the number of codecs specified, the video codec and
 * object type indicator, and the audio profile.
 *
 * @param {string} [codecs]
 *        The codec string to parse
 * @return {ParsedCodecInfo}
 *         Parsed codec info
 */

var parseCodecs = function parseCodecs(codecs) {
  if (codecs === void 0) {
    codecs = '';
  }

  var result = {
    codecCount: 0
  };
  result.codecCount = codecs.split(',').length;
  result.codecCount = result.codecCount || 2; // parse the video codec

  var parsed = /(^|\s|,)+(avc[13])([^ ,]*)/i.exec(codecs);

  if (parsed) {
    result.videoCodec = parsed[2];
    result.videoObjectTypeIndicator = parsed[3];
  } // parse the last field of the audio codec


  result.audioProfile = /(^|\s|,)+mp4a.[0-9A-Fa-f]+\.([0-9A-Fa-f]+)/i.exec(codecs);
  result.audioProfile = result.audioProfile && result.audioProfile[2];
  return result;
};
/**
 * Returns a ParsedCodecInfo object for the default alternate audio playlist if there is
 * a default alternate audio playlist for the provided audio group.
 *
 * @param {Object} master
 *        The master playlist
 * @param {string} audioGroupId
 *        ID of the audio group for which to find the default codec info
 * @return {ParsedCodecInfo}
 *         Parsed codec info
 */

var audioProfileFromDefault = function audioProfileFromDefault(master, audioGroupId) {
  if (!master.mediaGroups.AUDIO || !audioGroupId) {
    return null;
  }

  var audioGroup = master.mediaGroups.AUDIO[audioGroupId];

  if (!audioGroup) {
    return null;
  }

  for (var name in audioGroup) {
    var audioType = audioGroup[name];

    if (audioType.default && audioType.playlists) {
      // codec should be the same for all playlists within the audio type
      return parseCodecs(audioType.playlists[0].attributes.CODECS).audioProfile;
    }
  }

  return null;
};

exports.audioProfileFromDefault = audioProfileFromDefault;
exports.mapLegacyAvcCodecs = mapLegacyAvcCodecs;
exports.parseCodecs = parseCodecs;
exports.translateLegacyCodec = translateLegacyCodec;
exports.translateLegacyCodecs = translateLegacyCodecs;