// areAnscestorsUnknown.js
(function () {
  /*global adventurejs A*/
  var p = adventurejs.Tangible.prototype;
  /**
   * Checks to see if this asset or its containing parent(s)
   * are unknown to player. Takes into account nesting doll
   * situations and looks all the way up the chain.
   * Useful for determining whether a player can "see"
   * a nested object.
   * @memberOf adventurejs.Tangible
   * @method adventurejs.Tangible#areAnscestorsUnknown
   * @param {int} nestlevel
   * @returns {Boolean}
   */
  p.areAnscestorsUnknown = function Tangible_areAnscestorsUnknown(nestlevel) {
    if ("undefined" === typeof nestlevel) {
      nestlevel = 0;
    } else {
      nestlevel++;
    }
    var player_knows_parent = true;
    var parent = this.getPlaceAsset();

    if (
      parent &&
      "undefined" !== typeof parent.is.known &&
      "undefined" !== typeof parent.areAnscestorsUnknown
    ) {
      player_knows_parent = parent.areAnscestorsUnknown(nestlevel);
    }
    // We pass this call up and then back down the anscestor
    // chain, using nestlevel to keep track of our place in
    // the chain – but descendants need the opposite of the response
    // that we're going to send back to the original caller.
    nestlevel--;
    if (!this.is.known || !player_knows_parent) {
      return -1 < nestlevel ? false : true;
    } else {
      return -1 < nestlevel ? true : false;
    }
  };
})();