/*
	Slimbox v1.22 - 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 Ajaxbox = {

	init: function(options) {
		this.options = Object.extend({
			resizeDuration: 200,	// Duration of height and width resizing (ms)
			initialWidth: 50,		// Initial width of the box (px)
			initialHeight: 50,
			targetWidth: 500,
			targetHeight: 500,
			animateCaption: true
		}, options || {});

		this.anchors = [];
		$A(document.getElementsByTagName('a')).each(function(el){
			if(el.rel && el.href && el.rel.test('^ajaxbox', '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.bottom = new Element('div').setProperty('id', 'lbBottom').setStyle('display', 'none').injectInside(document.body);
		new Element('a').setProperties({id: 'lbCloseLink', href: '#'}).injectInside(this.bottom).onclick = this.overlay.onclick = this.close.bind(this);
		var nextEffect = this.nextEffect.bind(this);
		this.fx = {
			overlay: this.overlay.effect('opacity', { duration: 500 }).hide(),
			resize: this.center.effects({ duration: this.options.resizeDuration, onComplete: nextEffect }),
			image: this.image.effect('opacity', { duration: 500, onComplete: nextEffect }),
			bottom: this.bottom.effects({ duration: 400, onComplete: nextEffect })
		};
	},

	click: function(link) {
		this.targetWidth = link.rel.substring(link.rel.indexOf('(')+1, link.rel.indexOf(','));
		this.targetHeight = link.rel.substring(link.rel.indexOf(',')+1, link.rel.indexOf(')'));
		return this.open(link.href);
	},

	open: function(url) {
		this.position();
		this.setup(true);
		this.top = Window.getScrollTop() + (Window.getHeight() / 15);
		this.center.setStyles({top: this.top+'px', display: ''});
		this.fx.overlay.goTo(0.8);
		this.bottom.setStyles({opacity: '0', height: '0px', display: 'none'});
		this.fx.image.hide();
		this.center.className = 'lbLoading';
		this.step = 1;


		new Ajax(url, {
					postBody: 'ajax=true',
					method: 'post',
					onComplete: function(){
							this.nextEffect();
							this.center.className = '';
						}.bind(this),
					update: this.image
				}).request();
		eval(this.image);
		return false;
	},

	position: function() {
		this.overlay.setStyles({top: Window.getScrollTop()+'px', height: Window.getHeight()+'px'});
	},

	setup: function(open) {
		var elements = $A(document.getElementsByTagName('object'));
		elements.extend(document.getElementsByTagName(window.ActiveXObject ? 'select' : 'embed'));
		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();
		}
	},

	nextEffect: function() {
		switch(this.step++) {
		case 1:
			this.image.setStyles({width: this.targetWidth+'px'});
			this.image.style.height = this.targetHeight+'px';
			if(this.center.clientHeight != this.image.offsetHeight) {
				this.fx.resize.custom({height: [this.center.clientHeight, this.image.offsetHeight]});
				break;
			}
			this.step++;
		case 2:
			if(this.center.clientWidth != this.image.offsetWidth) {
				this.fx.resize.custom({width: [this.center.clientWidth, this.image.offsetWidth], marginLeft: [-this.center.clientWidth/2, -this.image.offsetWidth/2]});
				break;
			}
			this.step++;
		case 3:
			this.bottom.setStyles({top: (this.top + this.center.clientHeight)+'px', width: this.image.style.width, marginLeft: this.center.style.marginLeft, display: ''});
			this.fx.image.custom(0, 1);
			break;
		case 4:
			if(this.options.animateCaption) {
				this.fx.bottom.custom({opacity: [0, 1], height: [0, this.bottom.scrollHeight]});
				break;
			}
			this.bottom.setStyles({opacity: '1', height: this.bottom.scrollHeight+'px'});
		case 5:
			this.center.className = '';
			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].clearTimer();
		this.center.style.display = this.bottom.style.display = 'none';
		this.fx.overlay.chain(this.setup.pass(false, this)).goTo(0);
		return false;
	}
};

Window.onDomReady(Ajaxbox.init.bind(Ajaxbox));