/**
 * Stats component for displaying some render statistics (framerate, memory consumption, etc)
 * @param stats
 * @param id
 * @param name
 * @param domElement
 * @param parentEntity
 * @constructor
 */
GameLib.D3.Stats = function(
    stats,
    id,
    name,
    domElement,
    parentEntity
) {
	if (GameLib.Utils.UndefinedOrNull(stats)) {
	    throw new Error('Need Stats object')
	}
	this.stats = stats;

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

    if (GameLib.Utils.UndefinedOrNull(name)) {
        name = 'Stats (' + 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;

    if (GameLib.Utils.UndefinedOrNull(parentEntity)) {
        parentEntity = null;
    }
    this.parentEntity = parentEntity;

    GameLib.Component.call(
        this,
        GameLib.Component.COMPONENT_STATS,
        {
            'domElement': GameLib.DomElement
        }
    );
};

GameLib.D3.Stats.prototype = Object.create(GameLib.Component.prototype);
GameLib.D3.Stats.prototype.constructor = GameLib.D3.Stats;

GameLib.D3.Stats.prototype.resize = function() {
	console.log('override stats resize per implementation');
};

/**
 * Creates a helper instance
 */
GameLib.D3.Stats.prototype.createInstance = function() {
    this.instance = this.stats();

    this.resize();

    this.domElement.instance.parentElement.appendChild(this.instance.dom);

    GameLib.Component.prototype.createInstance.call(this);
};

/**
 * Updates the instance with the current state
 */
GameLib.D3.Stats.prototype.updateInstance = function() {
    this.instance = new this.stats();
};

GameLib.D3.Stats.prototype.start = function() {
	this.instance.begin();
};

GameLib.D3.Stats.prototype.end = function() {
	this.instance.end();
};