/*
	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.
	Modified by ShadowKris for shadowkris.com
*/

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.className && el.className.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').setProperty('id', 'lbOverlay').injectInside(document.body);

		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.image = new Element('div').setProperty('id', 'lbImage').injectInside(this.center);
		this.Bar = new Element('div').setProperty('id', 'lbBar').injectInside(this.image);
			this.NavBar = new Element('div').setProperty('id', 'lbNavBar').injectInside(this.Bar);
				this.prevLink = new Element('a').setProperties({id: 'lbPrevLink', href: '#', title: 'Image Precedente'}).injectInside(this.NavBar);
				this.nextLink = this.prevLink.clone().setProperties({id: 'lbNextLink', title: 'Image Suivante'}).injectInside(this.NavBar);
				this.prevLink.className = this.nextLink.className = 'navDefault';
					this.prevImg = new Element('img').setProperties({src: './images/icon/linkprev_d.png', alt: 'Precedent'}).injectInside(this.prevLink);
					this.nextImg = new Element('img').setProperties({src: './images/icon/linknext_d.png', alt: 'Suivant'}).injectInside(this.nextLink);
		this.prevLink.onclick = this.previous.bind(this);
		this.nextLink.onclick = this.next.bind(this);
			this.closeLink = new Element('a').setProperties({id: 'lbCloseLink', href: '#'}).injectInside(this.NavBar);
				new Element('img').setProperties({src: './images/icon/cross.png', alt: 'Fermer'}).injectInside(this.closeLink);
		this.closeLink.onclick = this.close.bind(this);

			this.TitleBar = new Element('div').setProperty('id', 'lbTitleBar').injectInside(this.Bar);
				this.pCaption = new Element('p').injectInside(this.TitleBar);

		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})
		};

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

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

		var j, imageNum, images = [];
		this.anchors.each(function(el){
			if (el.className == link.className){
				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(1);
		return this.changeImage(imageNum);
	},

	position: function(){
		this.overlay.setStyles({top: 0+'px', height: 100+'%'});
	},

	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.prevImg.setProperty('src', './images/icon/linkprev_d.png');
		this.nextImg.setProperty('src', './images/icon/linknext_d.png');
		this.prevLink.className = this.nextLink.className = 'navDefault';
		this.fx.image.hide();
		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.preload.width+'px';
			this.image.style.height = this.preload.height+'px';

			this.pCaption.setHTML((this.images.length == 1) ? '' : 'Image '+(this.activeImage+1)+' sur '+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.image.start(1);
			break;
		case 4:
			if (this.activeImage)
			{
				this.prevImg.setProperty('src', './images/icon/linkprev.png');
				this.prevLink.className = 'navPointer';
			}
			if (this.activeImage != (this.images.length - 1))
			{
				this.nextImg.setProperty('src', './images/icon/linknext.png');
				this.nextLink.className = 'navPointer';
			}
			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 = 'none';
		this.fx.overlay.chain(this.setup.pass(false, this)).start(0);
		return false;
	}
};

window.addEvent('domready', Lightbox.init.bind(Lightbox));