/**
 * @author Richard Davey <rich@photonstorm.com>
 * @copyright 2020 Photon Storm Ltd.
 * @license {@link https://opensource.org/licenses/MIT|MIT License}
 */

var Class = require('../utils/Class');
var DataManager = require('./DataManager');
var PluginCache = require('../plugins/PluginCache');
var SceneEvents = require('../scene/events');

/**
 * @classdesc
 * The Data Component features a means to store pieces of data specific to a Game Object, System or Plugin.
 * You can then search, query it, and retrieve the data. The parent must either extend EventEmitter,
 * or have a property called `events` that is an instance of it.
 *
 * @class DataManagerPlugin
 * @extends Phaser.Data.DataManager
 * @memberof Phaser.Data
 * @constructor
 * @since 3.0.0
 *
 * @param {Phaser.Scene} scene - A reference to the Scene that this DataManager belongs to.
 */
var DataManagerPlugin = new Class({

 Extends: DataManager,

 initialize:

 function DataManagerPlugin (scene)
 {
 DataManager.call(this, scene, scene.sys.events);

 /**
 * A reference to the Scene that this DataManager belongs to.
 *
 * @name Phaser.Data.DataManagerPlugin#scene
 * @type {Phaser.Scene}
 * @since 3.0.0
 */
 this.scene = scene;

 /**
 * A reference to the Scene's Systems.
 *
 * @name Phaser.Data.DataManagerPlugin#systems
 * @type {Phaser.Scenes.Systems}
 * @since 3.0.0
 */
 this.systems = scene.sys;

 scene.sys.events.once(SceneEvents.BOOT, this.boot, this);
 scene.sys.events.on(SceneEvents.START, this.start, this);
 },

 /**
 * This method is called automatically, only once, when the Scene is first created.
 * Do not invoke it directly.
 *
 * @method Phaser.Data.DataManagerPlugin#boot
 * @private
 * @since 3.5.1
 */
 boot: function ()
 {
 this.events = this.systems.events;

 this.events.once(SceneEvents.DESTROY, this.destroy, this);
 },

 /**
 * This method is called automatically by the Scene when it is starting up.
 * It is responsible for creating local systems, properties and listening for Scene events.
 * Do not invoke it directly.
 *
 * @method Phaser.Data.DataManagerPlugin#start
 * @private
 * @since 3.5.0
 */
 start: function ()
 {
 this.events.once(SceneEvents.SHUTDOWN, this.shutdown, this);
 },

 /**
 * The Scene that owns this plugin is shutting down.
 * We need to kill and reset all internal properties as well as stop listening to Scene events.
 *
 * @method Phaser.Data.DataManagerPlugin#shutdown
 * @private
 * @since 3.5.0
 */
 shutdown: function ()
 {
 this.systems.events.off(SceneEvents.SHUTDOWN, this.shutdown, this);
 },

 /**
 * The Scene that owns this plugin is being destroyed.
 * We need to shutdown and then kill off all external references.
 *
 * @method Phaser.Data.DataManagerPlugin#destroy
 * @since 3.5.0
 */
 destroy: function ()
 {
 DataManager.prototype.destroy.call(this);

 this.events.off(SceneEvents.START, this.start, this);

 this.scene = null;
 this.systems = null;
 }

});

PluginCache.register('DataManagerPlugin', DataManagerPlugin, 'data');

module.exports = DataManagerPlugin;