/*
	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: 250,
			animateCaption: true,
			showCounter: true,
			backgroundColor: "#484848",
			captionTextColor: "#dcdcdc",
			numberTextColor: "#a6a6a6",
			modal: false
		}, options || {});

		this.anchors = [];
		$each(document.links, 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': {'width': this.options.initialWidth, 'height': this.options.initialHeight, 'marginLeft': -(this.options.initialWidth/2), 'display': 'none'}}).injectInside(document.body);
		this.image = new Element('div', {'id': 'lbImage'}).injectInside(this.center);
		this.prevLink = new Element('a', {'id': 'lbPrevLink', 'href': '#', 'styles': {'display': 'none'}}).injectInside(this.image);
		this.launchLink = this.prevLink.clone().setProperty('id', 'lbLaunchLink').injectInside(this.image);
		
		//pngFixBG(this.launchLink, 96, 51)
		this.nextLink = this.prevLink.clone().setProperty('id', 'lbNextLink').injectInside(this.image);
		this.prevLink.onclick = this.previous.bind(this);
		this.launchLink.onclick = this.launchWebsite.bind(this);
		this.nextLink.onclick = this.next.bind(this);

		this.bottomContainer = new Element('div', {'id': 'lbBottomContainer', 'styles': {'display': 'none'}}).injectInside(document.body);
		this.topContainer = new Element('div', {'id': 'lbTopContainer', 'styles': {'display': 'none'}}).injectInside(document.body);
		this.bottom = new Element('div', {'id': 'lbBottom'}).injectInside(this.bottomContainer);
		this.lnkClose = new Element('a', {'id': 'lbCloseLink', 'href': '#'}).injectInside(this.topContainer)
		//this.lnkClose.appendChild(document.createTextNode("[X]"));
		this.lnkClose.onclick = this.overlay.onclick = this.close.bind(this);
		this.caption = new Element('div', {'id': 'lbCaption'}).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}),
			top: this.topContainer.effect('top', {duration: 400, onComplete: nextEffect})
		};

		this.preloadPrev = new Image();
		this.preloadNext = new Image();
	},
	init_onDemand: function(){
		$each(document.links, function(el){
			if (el.rel && el.rel.test(/^lightbox/i)){
				el.onclick = this.click.pass(el, this);
				this.anchors.push(el);
			}
		}, this);
	},
	click: function(link){
		if (link.rel.length == 8) return this.show(link.href, link.rev, link.target);

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

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

	open: function(images, imageNum){
		this.images = images;
		this.position();
		this.setup(true);
		//"+ 30" below is the offset to accomodate the height of the top title with the close btn
		this.top = window.getScrollTop() + (window.getHeight() / 35) + 30; 
		this.center.setStyles({top: this.top, display: ''});
		this.fx.overlay.start(0.8);
		return this.changeImage(imageNum);
	},
	
	open_ajax: function(param){
		//param.width = width, para.height = height, param.caption = caption, param.modal = true or false for modal mode 
		//param.text = the HTML text to display
		//param.url = the url to query for iFrane or Ajax load
		//param.ajax = true or false for ajax load
		//param.iframe = true or false for iframe
		//param.caption = caption text
		
		if (param.modal != undefined){ this.setModal(param.modal); }
		if (param.onComplete == undefined){ param.onComplete = function(){}; }
		//if (param.caption != undefined){ this.caption.setHTML(param.caption); }
		
		this.url = param.url;
		this.position();
		this.setup(true);
		//"+ 30" below is the offset to accomodate the height of the top title with the close btn
		this.top = window.getScrollTop() + (window.getHeight() / 35) + 30;
		this.center.setStyles({top: this.top, display: ''});
		this.image.setStyle("background", "transparent");
		this.fx.overlay.start(0.8);
		
		this.step = 1;
		
		var nextEffect_ajax = this.nextEffect_ajax.bind(this);
		this.fx_ajax = {
			//overlay: this.overlay.effect('opacity', {duration: 500}).hide(),
			resize: this.center.effects($extend({duration: this.options.resizeDuration, onComplete: nextEffect_ajax}, this.options.resizeTransition ? {transition: this.options.resizeTransition} : {})),
			//image: this.image.effect('opacity', {duration: 500, onComplete: nextEffect_ajax}),
			bottom: this.bottom.effect('margin-top', {duration: 400, onComplete: nextEffect_ajax}),
			top: this.topContainer.effect('top', {duration: 400, onComplete: nextEffect_ajax})
		};
		
		if (param.iframe){
			this.ajax_options = {
				frameBorder: 0,
				width: param.width,
				height: param.height,
				caption: param.caption,
				url: param.url
			};
			this.image.setHTML("");
			this.iframe = new Element('iframe', {'id': 'lbIframe'}).injectInside(this.image);
			this.iframe.setStyles({
				border: 0,
				width: param.width + 50,
				height: param.height,
				overflow: 'hidden'//,
    			//visibility: 'hidden'
			});
			Lightbox.nextEffect_ajax();
			/*
			this.iframe.src = param.url;
			//alert(this.iframe.src);
			this.iframe.addEvent("load", function(){
				//alert(this);
				Lightbox.nextEffect_ajax();
			}, this);
			*/
			
		}
		if (param.ajax){
			this.ajax_options = {
				width: param.width,
				height: param.height,
				caption: param.caption,
				method: 'get',
				'onSuccess': function(resp) {
					this.nextEffect_ajax();
					this.image.setHTML(resp);
					this.ajax = null;
					param.onComplete();
				}.bind(this),
				'onFailure': this.onError.bind(this)
			};
			
			this.ajax = new Ajax(this.url, this.ajax_options);
			this.ajax.request.delay(10, this.ajax);
		}
		if (param.text != undefined){
			this.ajax_options = {
				width: param.width,
				height: param.height,
				caption: param.caption
			}
			this.image.setHTML(param.text);
			this.nextEffect_ajax();
		}
		
	},
	onError: function() {
		this.image.setHTML('Error during loading');
	},
	updateText: function(param){
		//param.modal = true or false for mdal mode
		//param.text = new the body text
		//param.caption = new caption
		if (param.modal != undefined){ this.setModal(param.modal); }
		
		if (param.text != undefined){ this.image.setHTML(param.text); }
		if (param.caption != undefined){ this.caption.setHTML(param.caption); }
	},
	showCaption: function(){
		this.image.setStyle("background", '#fff');
		if ($type(this.iframe) == "element"){ this.iframe.setStyle("display", "block"); }
		//this.caption.setStyles({ color: this.options.captionTextColor });
		//this.number.setStyles({ color: this.options.numberTextColor });
	},
	hideCaption: function(){
		if ($type(this.iframe) == "element"){ this.iframe.setStyle("display", "none"); }
		//this.caption.setStyle("color", this.options.backgroundColor );
		//this.number.setStyle("color", this.options.backgroundColor );
	},
	launchWebsite: function(e){
		var event = new Event(e); event.stop(); event.stopPropagation();
		var target = this.images[this.activeImage][2];
		return window.open(target, '_blank');
	},
	setModal: function(bool){
		if (bool){
			this.modal = true;
			this.lnkClose.remove();
			this.lnkClose = null;
		} else {
			this.modal = false;
			if ($type(this.lnkClose) != "element") {
				this.lnkClose = new Element('a', {'id': 'lbCloseLink', 'href': '#'}).injectTop(this.bottom)
				//this.lnkClose.appendChild(document.createTextNode("[X]"));
				this.lnkClose.onclick = this.overlay.onclick = this.close.bind(this);
			}
		}
	},
	resetImageContainer: function(){
		if ($type(this.iframe) == "element"){ this.iframe.remove(); this.iframe = null; }
		this.image.setHTML("");
		this.caption.setHTML("");
		this.number.setHTML("");
		this.setModal(false);
		
		//this.center.setStyles({ width: this.options.initialWidth, height: this.options.initialHeight, 'marginLeft': -(this.options.initialWidth/2) });
		
		//if ($type(this.prevLink) != "element") {
			this.prevLink = new Element('a', {'id': 'lbPrevLink', 'href': '#', 'styles': {'display': 'none'}}).injectInside(this.image);
		this.launchLink = this.prevLink.clone().setProperty('id', 'lbLaunchLink').addClass("pngFix").injectInside(this.image);
			this.nextLink = this.prevLink.clone().setProperty('id', 'lbNextLink').injectInside(this.image);
			this.prevLink.onclick = this.previous.bind(this);
			this.launchLink.onclick = this.launchWebsite.bind(this);
			this.nextLink.onclick = this.next.bind(this);
		//}
	},

	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);
	},

	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.topContainer.style.display = this.prevLink.style.display = this.launchLink.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];
		return false;
	},

	nextEffect: function(){
		this.overlay.setStyle("display", "block");
		
		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.preload.width+'px';
			this.image.style.height = this.prevLink.style.height = this.nextLink.style.height = this.launchLink.style.height = this.preload.height+'px';
			
			this.hideCaption();
			this.number.setStyle("display", "block");
			this.caption.setHTML(this.images[this.activeImage][1] || '');
			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];
			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.bottomContainer.setStyles({top: this.top + this.center.clientHeight, height: 0, marginLeft: this.center.style.marginLeft, display: ''});
			this.topContainer.setStyles({top: this.top, height: 30, marginLeft: this.center.style.marginLeft, display: ''});
			this.fx.image.start(1);
			break;
		case 4:
				var topStart = this.top;
				var topEnd = this.top - 30;
				this.topContainer.setStyle("top", topStart);
				this.fx_ajax.top.start(topStart, topEnd);
			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.showCaption.delay(300, this);
			
			if (this.activeImage) this.prevLink.style.display = '';
			if (this.activeImage != (this.images.length - 1)) this.nextLink.style.display = '';
			if (this.images[this.activeImage][2]){ 	this.launchLink.style.display = '';	}
			this.step = 0;
		}
	},
	nextEffect_ajax: function(){
		//alert("Step " + this.step + " w/h = " + this.ajax_options.width + " " +  this.ajax_options.height);
		this.overlay.setStyle("display", "block");
		
		switch (this.step++){
		case 1:
			//alert(this.step);
			this.center.className = '';
			this.image.style.width = this.bottom.style.width =  this.topContainer.style.width = this.ajax_options.width+'px';
			this.image.style.height = this.prevLink.style.height = this.nextLink.style.height = this.ajax_options.height+'px';

			this.hideCaption();
			this.number.setStyle("display", 'none');
			this.caption.setHTML(this.ajax_options.caption || '');
			if (this.center.clientHeight != this.image.offsetHeight){
				this.fx_ajax.resize.start({height: this.image.offsetHeight});
				break;
			}
			this.step++;
		case 2:
			//alert(this.step);
			if (this.center.clientWidth != this.image.offsetWidth){
				this.fx_ajax.resize.start({width: this.image.offsetWidth, marginLeft: -this.image.offsetWidth/2});
				break;
			}
			this.step++;
		case 3:
			//alert(this.step);
			this.bottomContainer.setStyles({top: this.top + this.center.clientHeight, height: 0, marginLeft: this.center.style.marginLeft, display: ''});
			this.topContainer.setStyles({top: this.top, height: 30, marginLeft: this.center.style.marginLeft, display: ''});
			//this.fx_ajax.image.start(1); 
			this.nextEffect_ajax();
			break;
		case 4:
				var topStart = this.top;
				var topEnd = this.top - 30;
				this.topContainer.setStyle("top", topStart);
				this.fx_ajax.top.start(topStart, topEnd);
			//alert(this.step);
			if (this.options.animateCaption){
				this.fx_ajax.bottom.set(-this.bottom.offsetHeight);
				this.bottomContainer.style.height = '';
				this.fx_ajax.bottom.start(0);
				break;
			}
			this.bottomContainer.style.height = '';
		case 5:
			this.showCaption.delay(300, this);
			
			if (this.iframe != null){
				this.iframe.src = this.ajax_options.url;
				this.iframe.setStyle('visibility', 'visible');
			}
			this.step = 0;

		}
	},

	close: function(){
		if (this.modal) return;
		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 = this.topContainer.style.display = 'none';
		this.fx.overlay.chain(this.setup.pass(false, this)).start(0);
		this.overlay.setStyle("display", "none");
		
		this.resetImageContainer();
		
		return false;
	}
};

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