var $removeEvents = function (object, type)
{
	if (!object.events) return object;
	if (type){
		if (!object.events[type]) return object;
		for (var fn in object.events[type]) object.removeEvent(type, fn);
		object.events[type] = null;
	} else {
		for (var evType in object.events) object.removeEvents(evType);
		object.events = null;
	}
	return object;
};
		
var gallery = new Class({
	initialize: function(element, options) {
		this.setOptions({
			embedLinks: false,
			randomorder: false,
			fadeDuration: 2000,
			timed: true,
			delay: 5000,
			preloader: true,
			manualData: [],
			populateData: true,
			elementSelector: "div.imageElement",
			linkSelector: "a.open",
			imageSelector: "img.full",
			destroyAfterPopulate: true,
			baseClass: 'jdGallery'
		}, options);
		this.fireEvent('onInit');
		this.currentIter = 0;
		this.maxIter = 0;
		this.galleryElement = element;
		this.galleryData = this.options.manualData;
		this.galleryInit = 1;
		this.galleryElements = Array();
		this.galleryElement.addClass(this.options.baseClass);
		if (this.options.populateData)
			this.populateData();
		element.style.display="block";
		
		if (this.options.embedLinks)
		{
			this.currentLink = new Element('a').addClass('open').setProperties({
				href: '#',
				title: ''
			}).injectInside(element);
			this.galleryElement = element = this.currentLink;
		}
		
		this.constructElements();
		this.loadingElement = new Element('div').addClass('loadingElement').injectInside(element);
		this.doSlideShow(1);
	},
	populateData: function() {
		currentArrayPlace = this.galleryData.length;
		options = this.options;
		data = this.galleryData;
		this.galleryElement.getElements(options.elementSelector).each(function(el) {
			elementDict = {
				image: el.getElement(options.imageSelector).getProperty('src'),
				number: currentArrayPlace
			};
			if (options.embedLinks)
				Object.extend(elementDict, {
					link: el.getElement(options.linkSelector).href||false,
					linkTitle: el.getElement(options.linkSelector).title||false
				});
			
			data[currentArrayPlace] = elementDict;
			currentArrayPlace++;
			if (this.options.destroyAfterPopulate)
				el.remove();
		});
		this.galleryData = data;
		this.fireEvent('onPopulated');
	},
	constructElements: function() {
		el = this.galleryElement;
		this.maxIter = this.galleryData.length;
		var currentImg;
		for(i=0;i<this.galleryData.length;i++)
		{
			var currentImg = new Fx.Style(
				new Element('div').addClass('slideElement').setStyles({
					'position':'absolute',
					'left':'0px',
					'right':'0px',
					'margin':'0px',
					'padding':'0px',
					'backgroundImage':"url('" + this.galleryData[i].image + "')",
					'backgroundPosition':"center center",
					'opacity':'0'
				}).injectInside(el),
				'opacity',
				{duration: this.options.fadeDuration}
			);
			this.galleryElements[parseInt(i)] = currentImg;
		}
	},
	destroySlideShow: function(element) {
		var myClassName = element.className;
		var newElement = new Element('div').addClass('myClassName');
		element.parentNode.replaceChild(newElement, element);
	},
	startSlideShow: function() {
		this.fireEvent('onStart');
		this.loadingElement.style.display = "none";
		if (this.options.randomorder) {
			this.currentIter=Math.floor(Math.random()*this.maxIter)
		} else {
			this.currentIter = 0;
		}
		this.previousIter = -1;
		this.galleryInit = 0;
		this.galleryElements[parseInt(this.currentIter)].set(1);
		this.prepareTimer();
		if (this.options.embedLinks)
			this.makeLink(this.currentIter);
	},
	XXXXXXXXXXXOLDnextItem: function() {
		this.fireEvent('onNextCalled');
		this.nextIter = this.currentIter+1;
		if (this.nextIter >= this.maxIter)
			this.nextIter = 0;
		this.galleryInit = 0;
		this.goTo(this.nextIter);
	},
	nextItem: function() {
		this.fireEvent('onNextCalled');
		this.galleryInit = 0;
		if (this.options.randomorder) {
			do {
				this.nextIter = Math.floor(Math.random()*this.maxIter);
			} while (this.nextIter == this.currentIter || this.nextIter == this.previousIter);
			this.previousIter = this.currentIter;
			this.goTo(this.nextIter);
		} else {
			this.nextIter = this.currentIter+1;
			if (this.nextIter >= this.maxIter)
				this.nextIter = 0;
			this.goTo(this.nextIter);
		}
	},
	prevItem: function() {
		this.fireEvent('onPreviousCalled');
		this.nextIter = this.currentIter-1;
		if (this.nextIter <= -1)
			this.nextIter = this.maxIter - 1;
		this.galleryInit = 0;
		this.goTo(this.nextIter);
	},
	goTo: function(num) {
		this.clearTimer();
		if (this.options.embedLinks)
			this.clearLink();
		this.changeItem.delay(500, this, num);
		if (this.options.embedLinks)
			this.makeLink(num);
		this.prepareTimer();
	},
	changeItem: function(num) {
		this.fireEvent('onStartChanging');
		this.galleryInit = 0;
		if (this.currentIter != num)
		{
			for(i=0;i<this.maxIter;i++)
			{
				if ((i != this.currentIter)) this.galleryElements[i].set(0);
			}
			if (num > this.currentIter) this.galleryElements[num].custom(1);
			else
			{
				this.galleryElements[num].set(1);
				this.galleryElements[this.currentIter].custom(0);
			}
			this.currentIter = num;
		}
		this.doSlideShow.bind(this)();
		this.fireEvent('onChanged');
	},
	clearTimer: function() {
		if (this.options.timed)
			$clear(this.timer);
	},
	prepareTimer: function() {
		if (this.options.timed)
			this.timer = this.nextItem.delay(this.options.delay, this);
	},
	doSlideShow: function(position) {
		if (this.galleryInit == 1)
		{
			imgPreloader = new Image();
			imgPreloader.onload=function(){
				this.startSlideShow.delay(10, this);
			}.bind(this);
			imgPreloader.src = this.galleryData[0].image;
		}
	},
	makeLink: function(num) {
		this.currentLink.setProperties({
			href: this.galleryData[num].link,
			title: this.galleryData[num].linkTitle
		})
		if (!((this.options.embedLinks)))
			this.currentLink.setStyle('display', 'block');
	},
	clearLink: function() {
		this.currentLink.setProperties({href: '', title: ''});
		if (!((this.options.embedLinks)))
			this.currentLink.setStyle('display', 'none');
	}
});

gallery.implement(new Events);
gallery.implement(new Options);

/* Adapted from original code by Jonathan Schemoul */