/******************************************************************/
/*                        MOOdalBox 1.0                           */
/* A cross between "ModalBox" and "Slimbox", written for mootools */
/*         by Razvan Brates, razvanbrates [at] gmail.com          */
/******************************************************************/
/*                                                                */
/* MIT style license:                                             */
/* http://en.wikipedia.org/wiki/MIT_License                       */
/*                                                                */
/* mootools found at:                                             */
/* http://mootools.net/                                           */
/*                                                                */
/* Code based on "Slimbox", by Christophe Beyls:                  */
/* http://www.digitalia.be/software/slimbox                       */
/*                                                                */
/* Original idea, "ModalBox", by Andrew Okonetchnikov:            */
/* http://okonet.ru/projects/modalbox/                            */
/******************************************************************/

var MOOdalBox = {
	
	// init the MOOdalBox
	init: function (options) {
		
		// init default options
		this.options = Object.extend({
			resizeDuration: 400,	// Duration of height and width resizing (ms)
			fps: 1000,			    // Set the Frames Per Second (smoothness)
			initialWidth: 250,		// Initial width of the box (px)
			initialHeight: 250,		// Initial height of the box (px)
			defaultWidth: 500,		// Default width of the box (px)
			defaultHeight: 400,		// Default height of the box (px)
			animateCaption: true	// Enable/Disable caption animation
		}, options || {});
		
		

		// scan anchors for those opening a MOOdalBox
		this.anchors = [];
		$A($$('a')).each(function(el){
			if(el.rel && el.href && el.rel.test('^moodalbox', 'i')) {
				el.onclick = this.click.pass(el, this);
				this.anchors.push(el);
			}
		}, this);
		
		// add event listener 
		this.eventKeyDown = this.keyboardListener.bindAsEventListener(this);
		this.eventPosition = this.position.bind(this);
		
		// init the HTML elements
		
		// the overlay (clickable to close)
		this.overlay = new Element('div').setProperty('id', 'mb_overlay').injectInside(document.body);
		// the center element
		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);
		// the actual page contents
		this.contents = new Element('div').setProperty('id', 'mb_contents').injectInside(this.center);
	  this.inner = new Element('div').setProperty('id', 'mb_inner').injectInside(this.contents);
		// the bottom part (caption / close)
		this.bottom = new Element('div').setProperty('id', 'mb_bottom').setStyle('display', 'none').injectInside(document.body);
		new Element('a').setProperties({id: 'mb_close_link', href: '#'}).injectInside(this.bottom).onclick = this.overlay.onclick = this.close.bind(this);
		this.caption = new Element('div').setProperty('id', 'mb_caption').injectInside(this.bottom);
		new Element('div').setStyle('clear', 'both').injectInside(this.bottom);
		
		
		// init the effects
		var nextEffect = this.nextEffect.bind(this);
		this.fx = {
			overlay: this.overlay.effect('opacity', { duration: 1000, fps: 1000 }).hide(),
			resize: this.center.effects({ duration: this.options.resizeDuration, onComplete: nextEffect }),
			contents: this.contents.effect('opacity', { duration: 500, fps: 1000, onComplete: nextEffect }),
			bottom: this.bottom.effects({ duration: 400, fps: 1000, onComplete: nextEffect })
		};

	},
	
	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(0.7);
		return this.loadContents(sLinkHref);
	},

	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;
	},
	
	keyboardListener: function(event) {
	/*	switch(event.keyCode) {
			case 27: case 88: case 67: this.close(); break;
		}
	*/
	},
	
	loadContents: function() {		
		if(this.step) return false;
		this.step = 1;
		
		// check to see if there are specified dimensions or fall back to defaults
		var aDim = this.rel.match(/[0-9]+/g);
		this.options.contentsWidth = (aDim && (aDim[0] > 0)) ? aDim[0] : this.options.defaultWidth;
		this.options.contentsHeight = (aDim && (aDim[1] > 0)) ? aDim[1] : this.options.defaultHeight;
				
		this.bottom.setStyles({opacity: '0', height: '0px', display: 'none'});
		this.center.className = 'mb_loading';
		
		this.fx.contents.hide();
		
		// AJAX call here
		var nextEffect = this.nextEffect.bind(this);
		var ajaxLoad = new Ajax(this.href, {update: this.inner, onComplete: nextEffect, onStateChange: this.ajaxStateChange, postBody: 'x'}).request();
				
		return false;
	},
	
	ajaxStateChange: function (){
		// error handling still needs some tweaking
        if (this.transport.readyState != 4) return;
        var status;
        try { status = this.transport.status; } catch(e) { status = 0; }
        if ((status >= 200) && (status < 300)){
			//success
	
        } else {
				// oops.. something's gone wrong !
				alert ("There was a problem loading your page.\nPlease try again.");
			}	
        this.transport.onreadystatechange = Class.empty;
		
		
	},
	
	nextEffect: function() {
		switch(this.step++) {
		case 1:
			this.center.className = '';
			this.caption.setHTML(this.title);
			
			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.bottom.setStyles({top: (this.top + this.center.clientHeight)+'px', width: this.contents.style.width, marginLeft: this.center.style.marginLeft, display: ''});
			this.fx.contents.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.step = 0;
		}
	},
	
	close: function() {
		if(this.step < 0) return;
		this.step = -1;
		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)).custom(0);
		return false;
	}
		
};


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