var _ERROR_MESSAGE = "Oops.. there was a problem with your request.<br /><br />" +
					"Please try again.<br /><br />" +
					"<em>Click anywhere to close.</em>"; // the error message displayed when the request has a problem
var _RESIZE_DURATION 		= 400; 		// Duration of height and width resizing (ms)
var _INITIAL_WIDTH			= 250;		// Initial width of the box (px)
var _INITIAL_HEIGHT			= 250;		// Initial height of the box (px)
var _CONTENTS_WIDTH 		= 500;		// Actual width of the box (px)
var _CONTENTS_HEIGHT		= 400;		// Actual height of the box (px)
var _DEF_CONTENTS_WIDTH		= 700;		// Default width of the box (px) - used for resetting when a different setting was used
var _DEF_CONTENTS_HEIGHT	= 400;		// Default height of the box (px) - used for resetting when a different setting was used
var _ANIMATE_CAPTION		= true;		// Enable/Disable caption animation
var _EVAL_SCRIPTS			= false;	// Option to evaluate scripts in the response text
var _EVAL_RESPONSE			= false;	// Option to evaluate the whole response text

var MOOdalBox = {
	
	init: function (options) {
		
		this.options = Object.extend({
			resizeDuration: 	_RESIZE_DURATION,
			initialWidth: 		_INITIAL_WIDTH,	
			initialHeight: 		_INITIAL_HEIGHT,
			contentsWidth: 		_CONTENTS_WIDTH,
			contentsHeight: 	_CONTENTS_HEIGHT,
			defContentsWidth: 	_DEF_CONTENTS_WIDTH,
			defContentsHeight: 	_DEF_CONTENTS_HEIGHT,
			animateCaption: 	_ANIMATE_CAPTION,
			evalScripts: 		_EVAL_SCRIPTS,
			evalResponse: 		_EVAL_RESPONSE
		}, options || {});
		
		this.eventKeyDown = this.keyboardListener.bindWithEvent(this);
		this.eventPosition = this.position.bind(this);
		
		this.overlay = new Element('div').setProperty('id', 'mb_overlay').injectInside(document.body);
		this.center = new Element('div').setProperty('id', 'mb_center').setStyles({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', 'mb_contents').injectInside(this.center);

		this.error = new Element('div').setProperty('id', 'mb_error').setHTML(_ERROR_MESSAGE);
		
		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 }),
			contents: 	this.contents.effect('opacity', { duration: 500, onComplete: nextEffect })
		};
		
		this.ajaxRequest = Class.empty;

	},
	
	click: function(link) {
		return this.open (link.href, link.title, link.rel);
	},

	open: 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);
	},

	post: function(sTheForm, sLinkTitle, sLinkRel) {
		this.form = sTheForm;
		this.href = sTheForm.action;
		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(this.href);
	},

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

	setup: function(open) {
		var elements = $A($$('object'));
		elements.extend($$(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;
	},
	
	loadContents: function() {		
		if(this.step) return false;
		this.step = 1;
		

		var aDim = this.rel.match(/[0-9]+/g);
		this.options.contentsWidth = (aDim && (aDim[0] > 0)) ? aDim[0] : this.options.defContentsWidth;
		this.options.contentsHeight = (aDim && (aDim[1] > 0)) ? aDim[1] : this.options.defContentsHeight;
						
		this.center.className = 'mb_loading';
		
		this.fx.contents.hide();
		
		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
		};

		if(this.form) {
			ajaxOptions.method = 'post';
			this.ajaxRequest = this.form.send(ajaxOptions);
		} else {
			this.ajaxRequest = new Ajax(this.href, ajaxOptions).request();
		}

		return false;
	},
	
	ajaxFailure: function (){
		this.contents.setHTML('');
		this.error.clone().injectInside(this.contents);
		this.nextEffect();
		this.center.setStyle('cursor', 'pointer');
		this.center.onclick = this.bottom.onclick = this.close.bind(this);		
	},
	
	nextEffect: function() {
		switch(this.step++) {
		case 1:
			this.center.className = '';
			this.center.setStyle('cursor', 'default');
			this.center.onclick = '';
			
			this.contents.setStyles ({width: this.options.contentsWidth + "px", height: this.options.contentsHeight + "px"});

			if(this.center.clientHeight != this.contents.offsetHeight) {
				this.fx.resize.custom({height: [this.center.clientHeight, this.contents.offsetHeight]});
				break;
			}
			this.step++;
					
		case 2:
			if(this.center.clientWidth != this.contents.offsetWidth) {
				this.fx.resize.custom({width: [this.center.clientWidth, this.contents.offsetWidth], marginLeft: [-this.center.clientWidth/2, -this.contents.offsetWidth/2]});
				break;
			}
			this.step++;
		
		case 3:
			this.fx.contents.custom(0,1);
			break;
		
		case 4:
			if(this.options.animateCaption) {
				break;
			}

		case 5:
			this.step = 0;
		}
	},
	
	
	keyboardListener: function(event) {
		if ((event.control && event.key == 'w') || (event.control && event.key == 'x') || (event.key == 'esc')) {
			this.close();
			event.stop();
		}		
	},
	
	close: function() {
		if(this.step < 0) return;
		this.step = -1;
		for(var f in this.fx) this.fx[f].clearTimer();
		this.center.style.display = 'none';
		this.center.className = 'mb_loading';
		this.fx.overlay.chain(this.setup.pass(false, this)).custom(0);
		return false;
	}
		
};

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