// Constants defined here can be changed for easy config / translation
// (defined as vars, because of MSIE's lack of support for const)

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		= 150;		// Actual height of the box (px)
var _DEF_CONTENTS_WIDTH		= 300;		// Default width of the box (px) - used for resetting when a different setting was used
var _DEF_CONTENTS_HEIGHT	= 200;		// Default height of the box (px) - used for resetting when a different setting was used
var _DEF_FULLSCREEN_WIDTH	= 0.95;		// Default fullscreen width (%)
var _DEF_FULLSCREEN_HEIGHT	= 0.8;		// Default fullscreen height (%)
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

// The MOOdalBox object in its beauty
var MOOdalBox = {
	
	// init the MOOdalBox
	init: function (options) {
		
		// init default 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,
			defFullscreenWidth:	_DEF_FULLSCREEN_WIDTH,
			defFullscreenHeight:_DEF_FULLSCREEN_HEIGHT,
			animateCaption: 	_ANIMATE_CAPTION,
			evalScripts: 		_EVAL_SCRIPTS,
			evalResponse: 		_EVAL_RESPONSE
		}, options || {});
		
		// scan anchors for those opening a MOOdalBox

		
		// add event listeners
		this.eventKeyDown = this.keyboardListener.bindWithEvent(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
		//new Element('div').setProperty('id', 'mb_contents_top').injectInside(this.center);
		this.contents = new Element('div').setProperty('id', 'mb_contents').injectInside(this.center);

		// the bottom part (caption / close)
		this.bottom = new Element('div').setProperty('id', 'mb_bottom').setStyle('display', 'none').injectInside(document.body);
		
		this.caption = new Element('div').setProperty('id', 'mb_caption').injectInside(this.bottom);
		new Element('div').setStyle('clear', 'both').injectInside(this.bottom);
		//this.navigation = new Element('div').setProperties({id: 'mb_nav'}).injectInside(this.bottom);
		this.closelink = new Element('a').setProperties({id: 'mb_close_link', href: '#'}).injectInside(this.bottom);
		this.nex = new Element('a').setProperties({id: 'mb_next_link', href: '#'}).injectInside(this.bottom);
		this.prev = new Element('a').setProperties({id: 'mb_prev_link', href: '#'}).injectInside(this.bottom);
		this.info = new Element('div').setProperties({id: 'mb_info'}).injectInside(this.bottom);
		
		this.error = (new Element('div')).setProperty('id', 'mb_error').set('html',_ERROR_MESSAGE);
		
		// attach the close event to the close button / the overlay
		this.closelink.onclick = this.overlay.onclick = this.close.bind(this);
		
		this.anchors = [];
		this.scanAnchors (document.body, false, this);
		// scan forms for those opening a MOOdalBox
		this.forms = [];
		this.scanForms (document.body, false);		
		
		// init the effects
		var nextEffect = this.nextEffect.bind(this);
		this.fx = {
			overlay:	new Fx.Tween(this.overlay, {property: "opacity", duration: 500}).set(0),
			resize:		new Fx.Morph(this.center, $extend({duration: this.options.resizeDuration, onComplete: nextEffect}, this.options.resizeTransition ? {transition: this.options.resizeTransition} : {})),
			contents:	new Fx.Tween(this.contents, {property: "opacity", duration: 0, onComplete: nextEffect}),
			bottom:		new Fx.Morph(this.bottom, $extend({duration: 400, onComplete: nextEffect}, this.options.resizeTransition ? {transition: this.options.resizeTransition} : {}))
		};
		
		// AJAX related options
		var ajaxFailure = this.ajaxFailure.bind(this);
		this.ajaxOptions = {
			update: 		this.contents, 
			evalScripts: 	this.options.evalScripts,
			evalResponse: 	this.options.evalResponse,
			onComplete: 	nextEffect, 
			onFailure: 		ajaxFailure
			};
		
		this.ajaxRequest = Class.empty;

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

	open: function(sLinkHref, sLinkTitle, sLinkRel, oForm) {
		this.href = sLinkHref;
		this.title = sLinkTitle;
		this.rel = sLinkRel;
		
		if (oForm) {
			if (oForm.method == 'get') { 
				this.href += "?" + oForm.toQueryString(); 
				this.ajaxOptions = Object.extend(this.ajaxOptions, {method: 'get', postBody: ''});
			} else {
				this.ajaxOptions = Object.extend(this.ajaxOptions, {method: 'post', postBody: oForm});	
			}
		} else {
			this.ajaxOptions = Object.extend(this.ajaxOptions, {method: 'get', postBody: ''});
		}
		
		this.position();
		this.setup(true);
		this.top = Window.getScrollTop() + (Window.getHeight() / 15);
		this.center.setStyles({top: this.top+'px', display: ''});
		this.fx.overlay.start(0.4);
		return this.loadContents(sLinkHref);
	},

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

	scanAnchors: function(oWhere, bForce, p) {
		
		// scan anchors for those opening a MOOdalBox
		$A($(oWhere).getElements('a')).each(function(el){
			// we use a regexp to check for links that 
			// have a rel attribute starting with "moodalbox"
			if(el.href && ((el.rel && el.rel.test('^moodalbox', 'i')) || (bForce && !el.onclick))) {
				if (bForce && !el.rel) {
					// if we're forcing links to open in a moodalbox, we're keeping the current size
					el.rel = "moodalbox " + this.options.contentsWidth + "px "+ this.options.contentsHeight + "px";
					if (this.wizardMode) el.rel += " wizard";
				}
				
				el.onclick = this.click.pass(el, this);
				
				//p.prev.setProperties ({href: el.href, rel: el.rel});
				//p.prev.onlick = el.onclick;
				
				
				this.anchors.push(el);
				
				//el.destroy();
				
			}
		}, this);
	},

	scanForPrevious: function(oWhere, bForce, p) {
		
		// scan anchors for those opening a MOOdalBox
		$A($(oWhere).getElements('a')).each(function(el){
			// we use a regexp to check for links that 
			// have a rel attribute starting with "moodalbox"
			if(el.rel.test('^prev', 'i')) {
				if (bForce && !el.rel) {
					// if we're forcing links to open in a moodalbox, we're keeping the current size
					el.rel = "moodalbox " + this.options.contentsWidth + "px "+ this.options.contentsHeight + "px";
					if (this.wizardMode) el.rel += " wizard";
				}
				
				p.prev.setProperties ({href: el.href, rel: el.rel});
				p.prev.onclick = this.click.pass(p.prev, this);
				
				el.destroy();
				
			}
		}, this);
	},
	
	scanForNext: function(oWhere, bForce, p) {
		
		// scan anchors for those opening a MOOdalBox
		$A($(oWhere).getElements('a')).each(function(el){
			// we use a regexp to check for links that 
			// have a rel attribute starting with "moodalbox"
			if(el.rel.test('^next', 'i')) {
				if (bForce && !el.rel) {
					// if we're forcing links to open in a moodalbox, we're keeping the current size
					el.rel = "moodalbox " + this.options.contentsWidth + "px "+ this.options.contentsHeight + "px";
					if (this.wizardMode) el.rel += " wizard";
				}
				
				p.nex.setProperties ({href: el.href, rel: el.rel});
				p.nex.onclick = this.click.pass(p.nex, this);
				
				el.destroy();
				
			}
		}, this);
	},		
	
	scanForInfo: function(oWhere, bForce, p) {
		
		// scan anchors for those opening a MOOdalBox
		$A($(oWhere).getElements('div')).each(function(el){
			// we use a regexp to check for links that 
			// have a rel attribute starting with "moodalbox"
			if(el.id.test('^info', 'i')) {

				p.info.set("html", el.innerHTML);
				
				//p.prev.setProperties ({href: el.href, rel: el.rel});
				//p.prev.onclick = this.click.pass(p.prev, this);

				el.destroy();
				
			}
		}, this);
	},
	
	scanForms: function (oWhere, bForce) {
		// scan anchors for those opening a MOOdalBox
		$A($(oWhere).getElements('form')).each(function(el){
			// we use a regexp to check for links that 
			// have a rel attribute starting with "moodalbox"
			el.rel = el.getProperty('rel');
			if((el.rel && el.rel.test('^moodalbox', 'i')) || bForce) {
				if (bForce && !el.rel) {
					// if we're forcing links to open in a moodalbox, we're keeping the current size
					el.rel = "moodalbox " + this.options.contentsWidth + "px "+ this.options.contentsHeight + "px";
					if (this.wizardMode) el.rel += " wizard";
				}
				el.onsubmit = this.open.pass([el.action, el.title, el.rel, el], this);
				this.forms.push(el);
			}
		}, this);
	},

	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;
		
		// check to see if there are specified dimensions
		// if not, fall back to default values
		
		// fullscreen switch concept originally by Lennart Pilon (http://ljpilon.nl/)
		
		// we check for a "fullscreen" switch
		if (this.rel.test("fullscreen")){
			
			this.options.contentsWidth 	= this.options.defFullscreenWidth*window.getWidth();
			this.options.contentsHeight = this.options.defFullscreenHeight*window.getHeight();
		
		} else { // we check for other specified dimensions (px or %)
			
			var aDim = this.rel.match(/[0-9.]+(px|%)/g);	
					
			if (aDim && aDim[0]){ //first dimension is interpreted as width
		
				var w = aDim[0].toInt();
				
				if (aDim[0].test("%")) {
					this.options.contentsWidth = (w > 0) ? 0.01*w*window.getWidth() : this.options.defFullscreenWidth*window.getWidth();
				} else {
					this.options.contentsWidth = (w > 0) ? w : this.options.defContentsWidth;
				}
			} else { // we switch to defaults if there aren't any dimensions specified
				this.options.contentsWidth 	= this.options.defContentsWidth;
				this.options.contentsHeight = this.options.defContentsHeight;
			}

			if (aDim && aDim[1]){ // we have a second dimension specified, which we'll interpret as height
		
				var h = aDim[1].toInt();
				
				if (aDim[1].test("%")) {
					this.options.contentsHeight = (h > 0) ? 0.01*h*window.getHeight() : this.options.defFullscreenHeight*window.getHeight();
				} else {
					this.options.contentsHeight = (h > 0) ? h : this.options.defContentsHeight;
				}
			} else if (aDim && aDim[0]) { 
				// we have the first dimension specified, but not the second
				// so we interpret as width = height = the given value
				if (aDim[0].test("%")) {
					this.options.contentsHeight = (w > 0) ? 0.01*w*window.getHeight() : this.options.defFullscreenHeight*window.getHeight();
				} else {
					this.options.contentsHeight = (w > 0) ? w : this.options.defContentsHeight;
				}
			}
			// correct a little approximation bug (size flickers)
			this.options.contentsWidth = Math.floor(this.options.contentsWidth);
			this.options.contentsHeight = Math.floor(this.options.contentsHeight);
		
		}
		
		this.wizardMode = this.rel.test("wizard");
		
		// this is where we'll check for other options passed via the rel attribute
		
		this.bottom.setStyles({opacity: '0', height: '0px', display: 'none'});
		this.center.className = 'mb_loading';
		
		//this.fx.contents.hide();
		this.fx.contents.set(0);
		
		var ajaxFailure = this.ajaxFailure.bind(this);
		var nextEffect = this.nextEffect.bind(this);
		// AJAX call here
		this.ajaxOptions = {
			method: 		'get',
			url:			this.href,
			update: 		this.contents, 
			evalScripts: 	this.options.evalScripts,
			evalResponse: 	this.options.evalResponse,
			onComplete: 	nextEffect, 
			onFailure: 		ajaxFailure
			};
		//this.ajaxRequest = new Ajax(this.href, this.ajaxOptions).request();
		this.ajaxRequest = new Request.HTML(this.ajaxOptions).send();
		
		// make the local timeout call here
		
		return false;
	},
	
	ajaxFailure: function (){
		this.contents.setHTML('');
		this.error.clone().injectInside(this.contents);
		this.nextEffect();
		this.center.setStyle('cursor', 'pointer');
		this.bottom.setStyle('cursor', 'pointer');
		this.center.onclick = this.bottom.onclick = this.close.bind(this);		
	},
	
	
	// make the local timeout function here
	
	nextEffect: function() {
		switch(this.step++) {
		case 1:
			// remove previous styling from the elements 
			// (e.g. styling applied in case of an error)
			this.center.className = '';
			this.center.setStyle('cursor', 'default');
			this.bottom.setStyle('cursor', 'default');
			this.center.onclick = this.bottom.onclick = '';
			this.caption.set('html',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.start({height: this.contents.offsetHeight});
				break;
			}
			this.step++;
					
		case 2:
			if(this.center.clientWidth != this.contents.offsetWidth) {
				this.fx.resize.start({width: this.contents.offsetWidth, marginLeft: -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: ''});
			
			// check to see if in wizard mode and parse links
			//if (this.wizardMode) this.scanAnchors(this.contents, true, this);
			//if (this.wizardMode) this.scanForms(this.contents, true);
			this.scanForPrevious(this.contents, true, this);
			this.scanForNext(this.contents, true, this);
			this.scanForInfo(this.contents, true, this);
			
			this.fx.contents.start(1);
			break;
		
		case 4:
			if(this.options.animateCaption) {
				this.fx.bottom.start({opacity: 1, height: this.bottom.scrollHeight});
				break;
			}
			this.bottom.setStyles({opacity: '1', height: this.bottom.scrollHeight+'px'});

		case 5:
			this.step = 0;
		}
	},	
	
	keyboardListener: function(event) {
		// close the MOOdalBox when the user presses CTRL + W, CTRL + X, ESC
		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].cancel();
		this.center.style.display = this.bottom.style.display = 'none';
		this.center.className = 'mb_loading';
		this.fx.overlay.chain(this.setup.pass(false, this)).start(0);
		return false;
	},
	
	config: function(options) {
		this.options = Object.extend(this.options, options || {});
		return false; // to be used on links
	}
		
};

// startup
window.addEvent('domready', MOOdalBox.init.bind(MOOdalBox));