/*
	Slimbox v1.41 - The ultimate lightweight Lightbox clone
	by Christophe Beyls (http://www.digitalia.be) - MIT-style license.
	Inspired by the original Lightbox v2 by Lokesh Dhakar.
*/

var Lightbox = {

	init: function(options){
		this.options = $extend({
			resizeDuration: 400,
			resizeTransition: false,	// default transition
			initialWidth: 250,
			initialHeight: 260,
			maxWidth:570,
			maxHeight:390,
			minWidth:500,
			minHeight:342,
			animateCaption: false,
			showCounter: false
		}, options || {});

		this.anchors = [];
		$each(document.images, function(el){
			if (el.rel && el.rel.test(/^lightbox/i)){
				el.onclick = this.click.pass(el, this);
				this.anchors.push(el);
			}
		}, this);
		this.eventKeyDown = this.keyboardListener.bindAsEventListener(this);
		this.eventPosition = this.position.bind(this);

		this.overlay = new Element('div', {'id': 'lbOverlay'}).injectInside(document.body);

		this.center = new Element('div', {'id': 'lbCenter', 'styles': {'padding-top':'5px','width': this.options.initialWidth, 'height': this.options.initialHeight, 'marginLeft': -(this.options.initialWidth/2), 'display': 'none'}}).injectInside(document.body);
		
		new Element('a', {'id': 'lbCloseLink', 'href': '#','styles':{'display':'none'}}).injectInside(this.center).onclick = this.overlay.onclick = this.close.bind(this);
		this.caption = new Element('div', {'id': 'lbCaption','styles':{'display':'none'}}).injectInside(this.center);

		this.image = new Element('div', {'id': 'lbImage'}).injectInside(this.center);
		this.imageHolder = new Element('img', {'id': 'lbImageHolder'}).injectInside(this.image);
		this.prevLink = new Element('a', {'id': 'lbPrevLink', 'href': '#', 'styles': {'display': 'none'}}).injectInside(this.image);
		this.nextLink = this.prevLink.clone().setProperty('id', 'lbNextLink').injectInside(this.image);
		this.prevLink.onclick = this.previous.bind(this);
		this.nextLink.onclick = this.next.bind(this);

		this.bottomContainer = new Element('div', {'id': 'lbBottomContainer', 'styles': {'display':'none'}}).injectInside(document.body);
		this.bottom = new Element('div', {'id': 'lbBottom'}).injectInside(this.bottomContainer);
		this.icons = new Element('div', {'id': 'lbIcons','styles':{'width':'57%','float':'right'}}).injectInside(this.bottom);

//		this.number = new Element('div', {'id': 'lbNumber'}).injectInside(this.bottom);
		new Element('div', {'styles': {'clear': 'both'}}).injectInside(this.bottom);

		var nextEffect = this.nextEffect.bind(this);
		this.fx = {
			overlay: this.overlay.effect('opacity', {duration: 500}).hide(),
			resize: this.center.effects($extend({duration: this.options.resizeDuration, onComplete: nextEffect}, this.options.resizeTransition ? {transition: this.options.resizeTransition} : {})),
			image: this.image.effect('opacity', {duration: 500, onComplete: nextEffect}),
			bottom: this.bottom.effect('margin-top', {duration: 400, onComplete: nextEffect})
		};

		this.preloadPrev = new Image();
		this.preloadNext = new Image();
	},

	click: function(link){
		var j, imageNum, images = [];
		this.anchors.each(function(el){
			if (el.rel == link.rel){
				for (j = 0; j < images.length; j++) if(images[j][0] == el.href) break;
				if (j == images.length){
					images.push([el.getAttribute("org"), el.title]);
					if (el.href == link.href) imageNum = j;
				}
			}
		}, this);
		return this.open(images, imageNum);
	},

	show: function(url, n){

//		return this.open([[url, title]], 0);
		n = parseInt(n);
		var rel = url.getAttribute("rel");
//		var urlid = url.id;
		var img = [];
//		img.push([url.getAttribute("org"),url.title]);
		var imgs = document.images;
		for(var i=0;i<imgs.length;i++){
			if (imgs[i].getAttribute("rel") == rel){
				var _img = [imgs[i].getAttribute("org"),imgs[i].title];
				img.push(_img);
			}
		}
		this.open(img,n);
	},

	open: function(images, imageNum){
		this.images = images;
		this.position();
		this.setup(true);
		this.top = window.getScrollTop() + (window.getHeight() / 15);
		this.center.setStyles({top: this.top, display: ''});
		this.fx.overlay.start(0.8);
		
		for(var i=this.images.length;i>=1;i--){
			new Element('img', {'id':'iconnum'+i,'src':'/tpl/0001/images/flow/num_'+i+'off.jpg','width':'26','height':'25','class':'iconimage'}).injectInside(this.icons).onclick=this.display.pass(i-1,this);
		}

		return this.changeImage(imageNum);
	},

	position: function(){
		this.overlay.setStyles({'top': window.getScrollTop(), 'height': window.getHeight()});
	},

	setup: function(open){
		var elements = $A(document.getElementsByTagName('object'));
		elements.extend(document.getElementsByTagName(window.ie ? 'select' : 'embed'));
		elements.each(function(el){
			if (open) el.lbBackupStyle = el.style.visibility;
			el.style.visibility = open ? 'hidden' : el.lbBackupStyle;
		});
		var fn = open ? 'addEvent' : 'removeEvent';
		window[fn]('scroll', this.eventPosition)[fn]('resize', this.eventPosition);
		document[fn]('keydown', this.eventKeyDown);
		this.step = 0;
	},

	keyboardListener: function(event){
		switch (event.keyCode){
			case 27: case 88: case 67: this.close(); break;
			case 37: case 80: this.previous(); break;	
			case 39: case 78: this.next();
		}
	},

	previous: function(){
		return this.changeImage(this.activeImage-1);
	},

	next: function(){
		return this.changeImage(this.activeImage+1);
	},
	
	display:function(img){
		return this.changeImage(img);
	},

	changeImage: function(imageNum){
		if (this.step || (imageNum < 0) || (imageNum >= this.images.length)) return false;
		this.step = 1;
		this.activeImage = imageNum;

		this.bottomContainer.style.display = this.prevLink.style.display = this.nextLink.style.display = 'none';
		this.fx.image.hide();
		this.center.className = 'lbLoading';
		this.preload = new Image();
		this.preload.onload = this.nextEffect.bind(this);
		this.preload.src = this.images[imageNum][0];
		for(var i=1;i<=this.images.length;i++){
			var obj = document.getElementById('iconnum'+i);
			if (i==(imageNum+1)){obj.src='/tpl/0001/images/flow/num_'+i+'on.jpg';}
			else obj.src = '/tpl/0001/images/flow/num_'+i+'off.jpg';
		}
		return false;
	},

	nextEffect: function(){
		switch (this.step++){
		case 1:
			document.getElementById('lbCloseLink').style.display = 'none';
			document.getElementById('lbCaption').style.display = 'none';
			this.center.className = '';
//			this.image.style.backgroundImage = 'url('+this.images[this.activeImage][0]+')';
			this.imageHolder.src = this.images[this.activeImage][0];
			
			var w = Math.min(this.options.maxWidth,this.preload.width);
			var h = Math.min(this.options.maxHeight,this.preload.height);
			w = Math.max(this.options.minWidth,w);
			h = Math.max(this.options.minHeight,h);

			this.image.style.width = this.bottom.style.width = w+'px';
			this.imageHolder.style.width = (w - 20)+'px';
			this.image.style.height = this.prevLink.style.height = this.nextLink.style.height = h+'px';
			this.imageHolder.style.height = (h - 30)+'px';
			var caption = this.images[this.activeImage][1] || '';
			if (typeof caption == "object")	{caption = caption.title;}
			this.caption.setHTML(caption);
//			this.number.setHTML((!this.options.showCounter || (this.images.length == 1)) ? '' : 'Image '+(this.activeImage+1)+' of '+this.images.length);

			if (this.activeImage) this.preloadPrev.src = this.images[this.activeImage-1][0];
			if (this.activeImage != (this.images.length - 1)) this.preloadNext.src = this.images[this.activeImage+1][0];
			var h = Math.min(this.options.maxHeight,this.image.offsetHeight);
			if (this.center.clientHeight != h){
				this.fx.resize.start({height: h});
				break;
			}
			this.step++;
		case 2:
			var w = Math.min(this.options.maxWidth,this.image.offsetWidth);
			if (this.center.clientWidth != w){
				this.fx.resize.start({width: w, marginLeft: -w/2});
				break;
			}
			this.step++;
		case 3:
			this.bottomContainer.setStyles({top: this.top + this.center.clientHeight, height: 0, marginLeft: this.center.style.marginLeft, display: ''});
			this.fx.image.start(1);
			break;
		case 4:
			if (this.options.animateCaption){
				this.fx.bottom.set(-this.bottom.offsetHeight);
				this.bottomContainer.style.height = '';
				this.fx.bottom.start(0);
				break;
			}
			this.bottomContainer.style.height = '';
		case 5:
			if (this.activeImage) this.prevLink.style.display = '';
			if (this.activeImage != (this.images.length - 1)) this.nextLink.style.display = '';
			document.getElementById('lbCaption').style.display = 'block';
			document.getElementById('lbCloseLink').style.display = 'block';
			this.step = 0;
		}
	},

	close: function(){
		if (this.step < 0) return;
		this.step = -1;
		if (this.preload){
			this.preload.onload = Class.empty;
			this.preload = null;
		}
		for (var f in this.fx) this.fx[f].stop();
		this.center.style.display = this.bottomContainer.style.display = 'none';
		this.fx.overlay.chain(this.setup.pass(false, this)).start(0);
		document.getElementById('lbIcons').innerHTML = "";
		return false;
	}
};
window.addEvent('load', Lightbox.init.bind(Lightbox));