/**
 * Stats component for displaying some render statistics (framerate, memory consumption, etc)
 * @param gui
 * @param id
 * @param name
 * @param domElement
 * @param parentEntity
 * @constructor
 */
GameLib.GUI = function(
    gui,
    id,
    name,
    domElement,
    parentEntity
) {
	if (GameLib.Utils.UndefinedOrNull(gui)) {
	    throw new Error('Need Stats object')
	}
	this.gui = gui;

	GameLib.Component.call(
		this,
		GameLib.Component.COMPONENT_GUI,
		{
			'domElement': GameLib.DomElement
		},
		null,
		parentEntity
	);

    if (GameLib.Utils.UndefinedOrNull(id)) {
        id = GameLib.Utils.RandomId();
    }
    this.id = id;

    if (GameLib.Utils.UndefinedOrNull(name)) {
        name = 'GUI (' + id + ')';
    }
    this.name = name;

    if (GameLib.Utils.UndefinedOrNull(domElement)) {
        console.warn('Need a DOM element for stats');
        throw new Error('Need a DOM element for stats');
    }
    this.domElement = domElement;

    this.instance = this.createInstance();
};

GameLib.GUI.prototype = Object.create(GameLib.Component.prototype);
GameLib.GUI.prototype.constructor = GameLib.GUI;

/**
 * Creates a helper instance
 * @param update
 */
GameLib.GUI.prototype.createInstance = function(update) {

    var instance = null;

    if (update) {
        this.instance = new this.gui( { autoPlace: false } );
        instance = this.instance;
    } else {
		instance = new this.gui( { autoPlace: false } );
    }

    return instance;
};

/**
 * Updates the instance with the current state
 */
GameLib.GUI.prototype.updateInstance = function() {
    this.instance = this.createInstance(true);
};