// getDirection.js

(function () {
  /*global adventurejs A*/

  var p = adventurejs.Dictionary.prototype;

  /**
   *
   * @memberOf adventurejs.Dictionary
   * @method adventurejs.Dictionary#getDirection
   * @param {String} word A direction name.
   * Directions can have aliases,
   * for example 'ne' as a shortcut for 'northeast'.
   * When player inputs an alias, we want to lookup the primary name,
   * which we need to get the direction object.
   * @returns {String} The primary direction name.
   */
  p.getDirection = function Dictionary_getDirection(word) {
    if (typeof this.direction_lookup[word] !== "undefined") {
      return word;
    }
    for (var prop in this.direction_lookup) {
      if ("undefined" === typeof this.direction_lookup[prop].synonyms) {
        continue;
      }
      var synonyms = this.direction_lookup[prop].synonyms;
      for (var i = 0; i < synonyms.length; i++) {
        if (word === synonyms[i]) {
          // found a synonym, return the base word
          return prop;
        }
      }
    }
    return false;
  };
})();