//convertTemperature.js
/*global adventurejs A*/
/**
 * INCOMPLETE. A simple function to check whether a value is === false or null.
 * @method adventurejs.Game#convertTemperature
 * @memberOf adventurejs.Game
 * @param {Number|String} temperature In Celsius.
 * @param {String} parent_id The ID of the game object the temperature applies to.
 * @returns {Boolean}
 * @todo Finish writing this.
 */
adventurejs.convertTemperature = function Adventurejs_convertTemperature(
  temperature,
  parent_id
) {
  var newtemperature;

  // if it's number-as-string, convert to number
  // we default to celsius, so there y'go
  if (false === isNaN(temperature)) {
    newtemperature = Number(temperature);
  }

  // if it's a string, check for digits and suffix
  else if ("string" === typeof temperature) {
    // strip out spaces
    newtemperature = temperature.replace(/[ ]/g, "");

    var digits = "";
    var suffix = "";

    // separate digits from suffix
    // we're going to allow different forms of suffixes
    // so we're going to check every character
    for (var char in temperature) {
      var digit =
        false === isNaN(temperature[char]) || "." == temperature[char];

      if (digit) {
        // we only count digits until we start assembling a suffix
        // if this is true, we've encountered a digit in what we
        // think is the suffix and we don't know what to do with that
        if (0 > suffix.length) break;

        digits = digits + temperature[char];
        continue;
      }

      suffix = suffix + temperature[char];
    }

    digits = Number(digits);

    if ("f" === suffix.toLowerCase()) {
      // convert fahrenheit to celsius
      newtemperature = (digits - 32) * (5 / 9);
    }

    // no need here for c to f, but it would be
    // newtemperature = ( digits * ( 9 / 5 ) ) + 32
  }

  if (isNaN(newtemperature)) {
    newtemperature = this.game.settings.room_temperature;
    // let author know we don't know what to do with temperature
    // and set newtemperature to 0 for a valid return
    var msg = "";
    if ("undefined" !== typeof parent_id) msg += parent_id + "'s ";
    else msg += "An object's ";
    msg += `temperature was set to an invalid value. [MORE...] 
      \nconvertTemperature received a value of ${temperature}. 
      \nAdventure.js defaults to temperature in celsius. 
      \nRecognized suffixes are: 
      \n - c (celsius)
      \n - f (fahrenheit)`;
    this.game.log("L1047", "warn", "critical", msg, "Utility");
  }

  return newtemperature;
};