/*
	Slimbox v1.3 - 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 = Object.extend({
			resizeDuration: 400,
			resizeTransition: Fx.Transitions.sineInOut,
			initialWidth: 250,
			initialHeight: 250,
			animateCaption: true
		}, options || {});

		this.anchors = [];
		$each(document.links, function(el){
			if (el.rel && el.rel.test(/^slimbox/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').setProperty('id', 'lbOverlay').injectInside(document.body);

		this.topContainer = new Element('div').setProperty('id', 'lbTopContainer').setStyle('visibility', 'hidden').injectInside(document.body);
			this.topped = new Element('div').setProperty('id', 'lbTop').injectInside(this.topContainer);
			this.closeLink = new Element('a').setProperties({id: 'lbCloseLink', href: '#'}).injectInside(this.topped).onclick = this.overlay.onclick = this.close.bind(this);

		this.center = new Element('div').setProperty('id', 'lbCenter').setStyles({width: this.options.initialWidth+'px', height: this.options.initialHeight+'px', marginLeft: '-'+(this.options.initialWidth/2)+'px', display: 'none'}).injectInside(document.body);
		
		this.numberContainer = new Element('div').setProperty('id', 'lbNumberContainer').setStyles({'display':'none','overflow':'hidden'}).injectInside(document.body);
			this.number = new Element('div').setProperty('id', 'lbNumber').injectInside(this.numberContainer);
			this.prevLink = new Element('a').setProperties({id: 'lbPrevLink', href: '#'}).injectInside(this.number);
			
			this.cntact = new Element('span').setProperty('id','cntact').setHTML("01").injectInside(this.number);
			this.cntdiv = new Element('span').setProperty('id','cntdiv').setHTML("|").injectInside(this.number);
			this.cnttot = new Element('span').setProperty('id','cnttot').injectInside(this.number);
						
			this.nextLink = this.prevLink.clone().setProperty('id', 'lbNextLink').injectInside(this.number);
			this.prevLink.onclick = this.previous.bind(this);
			this.nextLink.onclick = this.next.bind(this);

		this.image = new Element('div').setProperty('id', 'lbImage').injectInside(this.center);
		
		this.bottomContainer = new Element('div').setProperty('id', 'lbBottomContainer').setStyle('display', 'none').injectInside(document.body);
			this.bottom = new Element('div').setProperty('id', 'lbBottom').injectInside(this.bottomContainer);
			this.caption = new Element('div').setProperty('id', 'lbCaption').injectInside(this.bottom);
			new Element('div').setStyle('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({duration: this.options.resizeDuration, transition: this.options.resizeTransition, onComplete: nextEffect}),
			image: this.image.effect('opacity', {duration: 500, onComplete: nextEffect}),
			bottom: this.bottom.effect('margin-top', {duration: 500, onComplete: nextEffect}),
			number: this.number.effect('margin-top', {duration: 500}),
			top: this.topped.effect('opacity', {duration: 250, onComplete: nextEffect})
		};

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

	click: function(link){
		if (link.rel.length == 8) return this.show(link.href, link.title);

		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.href, el.title]);
					if (el.href == link.href) imageNum = j;
				}
			}
		}, this);
		return this.open(images, imageNum);
	},

	show: function(url, title){
		return this.open([[url, title]], 0);
	},

	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+'px', display: ''});
		this.fx.overlay.start(0.8);
		return this.changeImage(imageNum);
	},

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

	setup: function(open){
		var elements = $A(document.getElementsByTagName('object'));
		if (window.ie) elements.extend(document.getElementsByTagName('select'));
		elements.each(function(el){ el.style.visibility = open ? 'hidden' : ''; });
		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);
	},

	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.numberContainer.style.display = this.topContainer.style.display = 'none';
		
		this.prevLink.addClass("disabledLinkLeft");
		this.nextLink.addClass("disabledLinkRight");
		
		//this.fx.number.hide();
		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];
		return false;
	},

	nextEffect: function(){
		
		switch (this.step++){
		case 1:
			this.center.className = '';
			this.image.style.backgroundImage = 'url('+this.images[this.activeImage][0]+')';
			this.image.style.width = this.bottom.style.width = this.topContainer.style.width = this.numberContainer.style.width = this.preload.width+'px';
			this.image.style.height = this.preload.height+'px';

			this.caption.setHTML('');
				var cap = this.images[this.activeImage][1].split("::") || "";
				var caph2 = cap[1]?new Element("h2").setHTML(cap[0]).injectInside(this.caption):"";
				var capp = new Element("p").setHTML(cap[1] || cap[0] || "").injectInside(this.caption);
			
			this.cntact.setHTML((this.activeImage+1) < 10?"0"+(this.activeImage+1):this.activeImage+1);
			this.cnttot.setHTML(this.images.length < 10?"0"+(this.images.length):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];
			if (this.center.clientHeight != this.image.offsetHeight){
				this.fx.resize.start({height: this.image.offsetHeight});
				break;
			}
			this.step++;
		case 2:
			if (this.center.clientWidth != this.image.offsetWidth){
				this.fx.resize.start({width: this.image.offsetWidth, marginLeft: -this.image.offsetWidth/2});
				break;
			}
			this.step++;
		case 3:
			this.fx.top.set(-this.top.offsetHeight);
			this.bottomContainer.setStyles({top: (this.top + this.center.clientHeight)+'px', height: '0px', marginLeft: this.center.style.marginLeft, display: ''});
			
			this.fx.image.start(1);
			break;
		
		case 4:
		
			this.fx.bottom.set(-this.bottom.offsetHeight);
		
			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:
		
			this.numberContainer.setStyles({top: (this.top + this.center.clientHeight+this.bottomContainer.getSize().size.y)+'px',height: '0px', marginLeft: this.center.style.marginLeft,display : ''});
			this.fx.number.set(-this.number.offsetHeight);
			
			if (this.activeImage) this.prevLink.removeClass("disabledLinkLeft");
			if (this.activeImage != (this.images.length - 1)) this.nextLink.removeClass("disabledLinkRight");

			this.numberContainer.style.height = '';
			this.fx.number.start(0);
			
			this.topContainer.setStyles({top: (this.top)+'px', height: '15px', marginLeft: this.center.style.marginLeft, display: ''});
			this.fx.top.start(1);
			
			break;
		
		
		case 6:
			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.numberContainer.style.display = this.center.style.display = this.bottomContainer.style.display = this.topContainer.style.display = 'none';
		this.fx.overlay.chain(this.setup.pass(false, this)).start(0);
		return false;
	}
};

window.addEvent('domready',function(){
	
	/* get Options */
	var resDur = (10-resizeSpeed)*100;
	
	var opt = Object.extend({'resizeDuration':resDur});
	
	Lightbox.init.attempt(opt,Lightbox)
});