/*
	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: 350,
			resizeTransition: false,	// default transition
			initialWidth: 250,
			initialHeight: 250,
			animateCaption: true,
			showCounter: true
		}, 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.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);
		new Element('a', {'id': 'lbCloseLink', 'href': '#'}).injectInside(this.bottom).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: 400}).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: 400, onComplete: nextEffect}),
			bottom: this.bottom.effect('margin-top', {duration: 300, onComplete: nextEffect})
		};

		this.preloadPrev = new Image();
		this.preloadNext = new Image();
		
		this.GMapApiSrc = 'http://www.google.com/jsapi?key=ABQIAAAADTMxYfx_AgmlzKD1t6eruxRsYAxOiDncVKaXSAXHdVasx0JsERTsdV2FvmzeOJSarBTtr9LY1gEM-g';
	},

	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);
	},
	
	showGMap: function(width, height, onComplete){
		return this.openGMap(width, height, onComplete);
	},

	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);
		return this.changeImage(imageNum);
	},
	
	openGMap: function(width, height, onComplete){
		this.GMap = true
		this.GMapWidth = width;
		this.GMapHeight = height;
		this.GMapOnComplete = onComplete;
		
		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);
		
		this.step = 1;
		this.nextEffect();
		return false;
	},
	
	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(){
		if (this.GMap) {
			return false;
		} else {
			return this.changeImage(this.activeImage-1);
		}
	},

	next: function(){
		if (this.GMap) {
			return false;
		} else {
			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.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;
	},
	
	loadGMapApi: function(){
		if (window['google']) {
			Lightbox.onLoadGMap();
		} else {
			var head = document.getElementsByTagName('head')[0];
	    	var js = document.createElement('script');
	    	js.setAttribute('type', 'text/javascript');
	    	js.setAttribute('src', this.GMapApiSrc + '&callback=Lightbox.loadGMap');
	    	head.appendChild(js);
		}
	},
	
	loadGMap: function(){
		google.load("maps", "2", {"callback": Lightbox.onLoadGMap });
	},
	
	onLoadGMap: function() {
		Lightbox.center.className = '';
		Lightbox.GMap = new google.maps.Map2(Lightbox.image);
		Lightbox.GMapOnComplete();
	},
	
	nextEffect: function(){
		switch (this.step++){
		case 1:
			if (this.GMap) {
				this.image.style.backgroundImage = '';
				this.image.style.width = this.bottom.style.width = this.GMapWidth+'px';
				this.image.style.height = this.GMapHeight+'px';
				
				this.caption.setHTML('');
				this.number.setHTML('');
			} else {
				this.center.className = '';
				this.image.style.backgroundImage = 'url('+this.images[this.activeImage][0]+')';
				this.image.style.width = this.bottom.style.width = this.preload.width+'px';
				this.image.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.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: ''});
			if (this.GMap) {
				this.fx.image.set(1);
				this.nextEffect();
			} else {
				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.GMap) {
				this.imageHtml = this.image.innerHTML;
				this.center.className = 'lbLoading';
				this.loadGMapApi();
			} else {
				if (this.activeImage) this.prevLink.style.display = '';
				if (this.activeImage != (this.images.length - 1)) this.nextLink.style.display = '';
			}
			this.step = 0;
		}
	},
	
	close: function(){
		if (this.step < 0) return;
		this.step = -1;
		if (this.GMap) {
			this.GMap = false;
			this.image.empty().setStyle('background-color', '').setHTML(this.imageHtml);
		} else {
			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);
		return false;
	}
};

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