/*
	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: 200,
			resizeTransition: Fx.Transitions.sineInOut,
			initialWidth: 250,
			initialHeight: 250,
			animateCaption: true,
			evalScripts: true,
			evalResponse: false,
			useDoubleClick: false,
			textAjaxError: 'Er is een probleem opgetreden met uw verzoek<br><br>Probeert u het nogmaals a.u.b.'
		}, options || {});
		this.isBox=false;
		this.anchors = [];
		$A($$('a')).each(function(el){
			if (el.rel && (el.rel.test(/^lightbox/i) || el.rel.test(/^moodalbox/i))){
				if (this.options.useDoubleClick)
					{el.ondblclick = this.click.pass(el, this);}
				else
					{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').setStyle('zIndex','999').injectInside(document.body);
		this.center = new Element('div').setProperty('id', 'lbCenter').setStyles({'zIndex':'1000',width: this.options.initialWidth+'px', height: this.options.initialHeight+'px', marginLeft: '-'+(this.options.initialWidth/2)+'px', display: 'none'}).injectInside(document.body);
		this.contents = new Element('div').setProperty('id', 'lbImage').injectInside(this.center);
		this.prevLink = new Element('a').setProperties({id: 'lbPrevLink', href: '#'}).setStyle('display', 'none').injectInside(this.contents);
		this.nextLink = this.prevLink.clone().setProperty('id', 'lbNextLink').setStyle('display', 'none').injectInside(this.contents);
		this.prevLink.onclick = this.previous.bind(this);
		this.nextLink.onclick = this.next.bind(this);
		//this.bottomContainer = new Element('div').setProperty('id', 'lbBottomContainer').setStyles({'zIndex':'1001',display:'none'}).injectInside(document.body);
		this.bottom = new Element('div').setProperty('id', 'lbBottom').injectInside(this.center);
		new Element('a').setProperties({id: 'lbCloseLink', href: '#'}).injectInside(this.bottom).onclick = this.overlay.onclick = this.close.bind(this);
		this.caption = new Element('div').setProperty('id', 'lbCaption').injectInside(this.bottom);
		this.number = new Element('div').setProperty('id', 'lbNumber').injectInside(this.bottom);
		new Element('div').setStyle('clear', 'both').injectInside(this.bottom);
		this.error = new Element('div').setProperty('id', 'mb_error').setHTML(this.options.textAjaxError);
		var nextEffect = this.nextEffect.bind(this);
		this.fx = {
			overlay: this.overlay.effect('opacity', {duration: 100}).hide(),
			resize: this.center.effects({duration: this.options.resizeDuration, transition: this.options.resizeTransition, onComplete: nextEffect}),
			contents: this.contents.effect('opacity', {duration: 500, onComplete: nextEffect}),
			bottom: this.bottom.effect('opacity', {duration: 50, onComplete: nextEffect}).hide()
		};

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

	click: function(link){
		this.contents.setHTML('');
		this.isBox=true;
		if (link.rel.test(/^moodalbox/i)) return this.openBox (link.href, link.title, link.rel);
		this.isBox=false;
		this.prevLink = new Element('a').setProperties({id: 'lbPrevLink', href: '#'}).setStyle('display', 'none').injectInside(this.contents);
		this.nextLink = this.prevLink.clone().setProperty('id', 'lbNextLink').setStyle('display', 'none').injectInside(this.contents);		
		this.prevLink.onclick = this.previous.bind(this);
		this.nextLink.onclick = this.next.bind(this);		
		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, rel){
		this.isBox=(rel.test(/^moodalbox/i));
		if (this.isBox)
			{alert('box');}
		else
			{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);
	},
	
	openBox: function(sLinkHref, sLinkTitle, sLinkRel) {
		this.href = sLinkHref;
		this.title = sLinkTitle;
		this.rel = sLinkRel;
		this.position();
		this.setup(true);
		this.top = Window.getScrollTop() + (Window.getHeight() / 15);
		this.center.setStyles({top: this.top+'px', display: ''});
		this.fx.overlay.custom(0.8);
		return this.loadContents(sLinkHref);
	},	

	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.prevLink.style.display = this.nextLink.style.display = 'none';
		this.fx.contents.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;
	},

	loadContents: function() {		
		if(this.step) return false;
		this.step = 1;
		
		// check to see if there are specified dimensions
		// if not, fall back to default values
		var aDim = this.rel.match(/[0-9]+/g);
		this.options.initialWidth = (aDim && (aDim[0] > 0)) ? aDim[0] : this.options.initialWidth;
		this.options.initialHeight = (aDim && (aDim[1] > 0)) ? aDim[1] : this.options.initialHeight;			
		//this.bottomContainer.setStyle('display','none');
		this.center.className = 'mb_loading';
		
		this.fx.contents.hide();
		
		// AJAX call here
		var nextEffect = this.nextEffect.bind(this);
		var ajaxFailure = this.ajaxFailure.bind(this);
		var ajaxOptions = {
			method: 		'get',
			update: 		this.contents, 
			evalScripts: 	this.options.evalScripts,
			evalResponse: 	this.options.evalResponse,
			onComplete: 	nextEffect, 
			onFailure: 		ajaxFailure
			};
		this.ajaxRequest = new Ajax(this.href, ajaxOptions).request();
		return false;
	},
	
	ajaxFailure: function (){
		this.contents.setHTML('');
		this.error.clone().injectInside(this.contents);
		this.nextEffect();
	},

	nextEffect: function(){
		switch (this.step++){
		case 1:
			this.center.className = '';
			this.fx.bottom.hide();
			if (this.isBox)
				{
				this.contents.style.backgroundImage='';
				this.caption.setHTML(this.title);
				this.contents.setStyles ({width: this.options.initialWidth + "px", height: this.options.initialHeight + "px"});
				if(this.center.clientHeight != this.contents.offsetHeight) {
					this.fx.resize.custom({height: [this.center.clientHeight, this.contents.offsetHeight]});
					break;				
					}
				}
			else
				{
				this.contents.style.backgroundImage = 'url('+this.images[this.activeImage][0]+')';
				this.contents.style.width = this.bottom.style.width = this.preload.width+'px';
				this.contents.style.height = this.prevLink.style.height = this.nextLink.style.height = this.preload.height+'px';
				this.caption.setHTML(this.images[this.activeImage][1] || '');
				this.number.setHTML((this.images.length == 1) ? '' : 'Afbeelding '+(this.activeImage+1)+' van '+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.contents.offsetHeight+this.bottom.offsetHeight){
					this.fx.resize.start({height: this.contents.offsetHeight+this.bottom.offsetHeight});
					break;
					}
				}
			this.step++;
		case 2:
			if (this.center.clientWidth != this.contents.offsetWidth){
				this.fx.resize.start({width: this.contents.offsetWidth, marginLeft: -this.contents.offsetWidth/2});
				break;
			}
			this.step++;
		case 3:
			//this.bottomContainer.setStyles({top: (this.top + this.center.clientHeight)+'px', height: '0px', marginLeft: this.center.style.marginLeft, display: ''});
			this.fx.contents.start(1);
			break;
		case 4:
			if (this.isBox)
				{
				break;
				}
			if (this.options.animateCaption ){
				//this.fx.bottom.set(-this.bottom.offsetHeight);
				//this.bottomContainer.style.height = '';
				this.fx.bottom.start(1);
				break;
			}
			//this.bottomContainer.style.height = '';
		case 5:
		  if (!this.isBox)
				{
				if (this.activeImage) this.prevLink.style.display = '';
				if (this.activeImage != (this.images.length - 1)) this.nextLink.style.display = '';
				}
			this.step = 0;
		}
	},

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