class EFMarquee {
	constructor() {
		this.element = null;
	}

	static getInstance() {
		return (typeof yunos != 'undefined') ? tv_marquee : new EFMarquee();
	}

	create(node, speed) {
		this.element = node;
		this.timer = null;
		this.startX = 0;
		this.stopX = 0;
		this.currentX = 0;
		return this;
	}

	start(circle) {
		// this.element.className = 'ef_marquee';
		this.element.classList.add('ef_marquee');
		console.log('document :' + document.body.clientWidth);
		console.log('marquee p width:' + this.element.childNodes[0].clientWidth);
		this.startX = this.element.clientWidth;
		this.stopX = this.element.childNodes[0].clientWidth * -1;
		this.currentX = this.startX;

		function updateFrame(dom, x) {
			dom.setAttribute('style', 'left:' + x + 'px');
		}

		function update(context) {
			context.timer = setTimeout(function() {
				context.currentX -= 1;
				updateFrame(context.element.childNodes[0], context.currentX);
				if (context.currentX > context.stopX) {
					update(context);
					return;
				}
				if (circle) {
					context.currentX = context.startX;
					update(context);
				} else {
					context.currentX = 0;
					updateFrame(context.element.childNodes[0], context.currentX);
				}
			}.bind(this), 30);
		}
		update(this);
	}

	setStr(str) {
		this.element.innerHTML = '<p>' + str + '</p>';
	}

	stop() {
		this.element.className = '';
		clearTimeout(this.timer);
	}
}

module.exports = EFMarquee;