// Events.js
(function () {
  /*global adventurejs A*/
  "use strict";

  // https://stackoverflow.com/questions/15308371/custom-events-model-without-using-dom-events-in-javascript

  // initEvent deprecated - but not createEvent? - use CustomEvent instead
  // https://developer.mozilla.org/en-US/docs/Web/API/CustomEvent
  // https://developer.mozilla.org/en-US/docs/Web/Events/Creating_and_triggering_events

  /**
   * @class adventurejs.Events
   * @ajsnavheading FrameworkReference
   * @param {Game} game A reference to the game instance.
   * @summary Events fire at beginning / end of each turn, and can be exploited.
   * @classdesc
   * <p>
   * We only fire a few events, all at the beginning and end of a turn:
   * <code>inputEnter</code>,
   * <code>inputParseBegin</code>,
   * <code>inputParseComplete</code>, and
   * <code>inputQueueNext</code>
   * (which fires between queued inputs).
   * Authors can hook into these to run custom code.
   * For example, you could write a series of random in-game background
   * events tied to specific {@link adventurejs.Room|Rooms},
   * to print additional text to the {@link adventurejs.Display|Display}
   * after parsing has completed.
   * </p>
   * <h3>Example:</h3>
   * <pre class="display"><code class="language-javascript">MyGame.reactor.addEventListener('inputParseComplete', function()
   * {
   *   var random = Math.random() * 100;
   *   switch (MyGame.world._currentRoom.name)
   *   {
   *     case "Frigid Wastes":
   *       if( random < 10 )
   *       {
   *         MyGame.print(
   *           "You're struck by a flash of blinding light as
   *           sunlight reflects off the packed ice.", "random"
   *         );
   *       }
   *       break;
   *     case "Desert Wastes":
   *       if( random > 5 && random < 10 )
   *       {
   *         MyGame.print(
   *           "Heat haze shimmers off the distant dunes.", "random"
   *         );
   *       }
   *       else if( random > 10 && random <  15 )
   *       {
   *         MyGame.print(
   *           "You feel the sand shift beneath your feet.", "random"
   *         );
   *       }
   *       break;
   *   }
   * });
   * </code></pre>
   */
  class Events {
    constructor(game) {
      /**
       * A reference back to the main {@link adventurejs.Game|Game} object.
       * @var {Object} adventurejs.Events#game
       * @default {}
       */
      this.game = game;

      /**
       * Event to be fired on player enters input.
       * @var {Event} adventurejs.Events#inputEnter
       */
      this.inputEnter = document.createEvent("Event");
      this.inputEnter.initEvent("inputEnter", true, true);

      /**
       * Event to be fired on input parse begin.
       * @var {Event} adventurejs.Events#inputParseBegin
       */
      this.inputParseBegin = document.createEvent("Event");
      this.inputParseBegin.initEvent("inputParseBegin", true, true);

      /**
       * Event to be fired on input parse complete.
       * @var {Event} adventurejs.Events#inputParseComplete
       */
      this.inputParseComplete = document.createEvent("Event");
      this.inputParseComplete.initEvent("inputParseComplete", true, true);

      /**
       * Event to be fired on queue next input when parsing a queue.
       * @var {Event} adventurejs.Events#inputQueueNext
       */
      this.inputQueueNext = document.createEvent("Event");
      this.inputQueueNext.initEvent("inputQueueNext", true, true);

      // this.playerChangeLocation = document.createEvent('Event');
      // this.playerChangeLocation.initEvent("playerChangeLocation", true, true);

      this.game.reactor.addEventListener("inputEnter", function (e) {
        var msg = "Event > inputEnter";
        this.game.log("log", "high", msg, "events");
      });

      this.game.reactor.addEventListener("inputParseBegin", function (e) {
        var msg = "Event > inputParseBegin";
        this.game.log("log", "high", msg, "events");
      });

      this.game.reactor.addEventListener("inputParseComplete", function (e) {
        var msg = "Event > inputParseComplete";
        this.game.log("log", "high", msg, "events");
        e.target.game.updateDisplayVerbs();
        e.target.game.updateDisplayInventory();
        // e.target.game.updateDisplayRoom();
        // e.target.game.updateDisplayCompasses();
        e.target.game.printRoomZoneEvents();
        e.target.game.callIntervals();
      });

      this.game.reactor.addEventListener("inputQueueNext", function (e) {
        var msg = "Event > inputQueueNext";
        this.game.log("log", "high", msg, "events");
      });

      // this.game.reactor.addEventListener('playerChangeLocation', function(event, other){
      // var msg = "Event > playerChangeLocation";
      // this.game.log( "log", "high", msg , 'events' );
      // });
    }
  }
  adventurejs.Events = Events;
})();