/**
 * SqueezeBox - Expandable Lightbox
 *
 * Allows to open various content as modal,
 * centered and animated box.
 *
 * Dependencies: MooTools 1.2 trunk (04/2008)
 *
 * Inspired by
 *  ... Lokesh Dhakar	- The original Lightbox v2
 *
 * @version		1.1 rc2
 *
 * @license		MIT-style license
 * @author		Harald Kirschner <mail [at] digitarald.de>
 * @copyright	Author
 */
var SqueezeBox = {

	presets: {
		size: {x: 600, y: 450},
		sizeLoading: {x: 200, y: 150},
		marginInner: {x: 20, y: 20},
		marginImage: {x: 50, y: 75},
		handler: false,
		target: null,
		closable: true,
		closeBtn: true,
		zIndex: 65555,
		overlayOpacity: 0.7,
		classWindow: '',
		classOverlay: '',
		overlayFx: {},
		resizeFx: {},
		contentFx: {},
		parse: false, // 'rel'
		parseSecure: false,
		ajaxOptions: {},
		onOpen: $empty,
		onClose: $empty,
		onUpdate: $empty,
		onResize: $empty,
		onMove: $empty,
		onShow: $empty,
		onHide: $empty
	},

	initialize: function(presets) {
		if (this.options) return this;
		this.presets = $merge(this.presets, presets);
		this.options = {};
		this.setOptions(this.presets).build();
		this.bound = {
			window: this.reposition.bind(this, [null]),
			scroll: this.checkTarget.bind(this),
			close: this.close.bind(this),
			key: this.onKey.bind(this)
		};
		this.isOpen = this.isLoading = false;
		return this;
	},

	build: function() {
		this.overlay = new Element('div', {
			id: 'sbox-overlay',
			styles: {display: 'none', zIndex: this.options.zIndex}
		});
		this.content = new Element('div', {id: 'sbox-content'});
		this.closeBtn = new Element('a', {id: 'sbox-btn-close', href: '#'});
		this.win = new Element('div', {
			id: 'sbox-window',
			styles: {display: 'none', zIndex: this.options.zIndex + 2}
		}).adopt(this.closeBtn, this.content);
		this.fx = {
			overlay: new Fx.Tween(this.overlay, $merge({
				property: 'opacity',
				onStart: Events.prototype.clearChain,
				duration: 250,
				link: 'cancel'
			}, this.options.overlayFx)).set(0),
			win: new Fx.Morph(this.win, $merge({
				onStart: Events.prototype.clearChain,
				unit: 'px',
				duration: 750,
				transition: Fx.Transitions.Quint.easeOut,
				link: 'cancel',
				unit: 'px'
			}, this.options.resizeFx)),
			content: new Fx.Tween(this.content, $merge({
				property: 'opacity',
				duration: 250,
				link: 'cancel'
			}, this.options.contentFx)).set(0)
		};
		$(document.body).adopt(this.overlay, this.win);
	},

	assign: function(to, options) {
		return to.addEvent('click', function() {
			return !SqueezeBox.fromElement(this, options);
		});
	},

	fromElement: function(from, options) {
		this.initialize();
		if (this.element) this.trash();
		this.element = $(from);
		this.setOptions($merge(this.presets, options || {}));
		if (this.element && this.options.parse) {
			var obj = this.element.getProperty(this.options.parse);
			if (obj && (obj = JSON.decode(obj, this.options.parseSecure))) this.setOptions(obj);
		}
		this.assignOptions();
		this.url = ((this.element) ? (this.options.url || this.element.get('href')) : from) || '';
		var handler = this.options.handler;
		if (handler) return this.setContent(handler, this.parsers[handler].call(this, true));
		var ret = false;
		this.parsers.some(function(parser, key) {
			var content = parser.call(this);
			if (content) {
				ret = this.setContent(key, content);
				return true;
			}
			return false;
		}, this);
		return ret;
	},

	assignOptions: function() {
		this.overlay.set('class', this.options.classOverlay);
		this.win.set('class', this.options.classWindow);
		if (Browser.Engine.trident4) this.win.addClass('sbox-window-ie6');
	},

	close: function(e) {
		var stoppable = ($type(e) == 'event');
		if (stoppable) e.stop();
		if (!this.isOpen || (stoppable && !$lambda(this.options.closable).call(this, e))) return this;
		this.fx.overlay.start(0).chain(this.toggleOverlay.bind(this));
		this.win.setStyle('display', 'none');
		this.trash();
		this.toggleListeners();
		this.isOpen = false;
		this.fireEvent('onClose', [this.content]);
		return this;
	},

	trash: function() {
		this.element = this.asset = null;
		this.options = {};
		this.removeEvents().setOptions(this.presets).callChain();
	},

	onError: function() {
		this.asset = null;
		this.setContent('string', 'Error during loading');
	},

	setContent: function(handler, content) {
		if (!this.handlers[handler]) return false;
		this.content.className = 'sbox-content-' + handler;
		this.applyTimer = this.applyContent.delay(this.fx.overlay.options.duration, this, this.handlers[handler].call(this, content));
		if (this.overlay.retrieve('opacity')) return this;
		this.toggleOverlay(true);
		this.fx.overlay.start(this.options.overlayOpacity);
		return this.reposition();
	},

	applyContent: function(content, size) {
		this.applyTimer = $clear(this.applyTimer);
		this.hideContent();
		if (!content) {
			this.toggleLoading(true);
		} else {
			if (this.isLoading) this.toggleLoading(false);
			this.fireEvent('onUpdate', [this.content], 20);
		}
		this.content.empty();
		if (['string', 'array', false].contains($type(content))) this.content.set('html', content || '');
		else this.content.adopt(content);
		this.callChain();
		if (!this.isOpen) {
			this.toggleListeners(true);
			this.resize(size, true);
			this.isOpen = true;
			this.fireEvent('onOpen', [this.content]);
		} else {
			this.resize(size);
		}
	},

	resize: function(size, instantly) {
		var box = document.getSize(), scroll = document.getScroll();
		this.size = $merge((this.isLoading) ? this.options.sizeLoading : this.options.size, size);
		var to = {
			width: this.size.x,
			height: this.size.y,
			left: (scroll.x + (box.x - this.size.x - this.options.marginInner.x) / 2).toInt(),
			top: (scroll.y + (box.y - this.size.y - this.options.marginInner.y) / 2).toInt()
		};
		$clear(this.showTimer || null);
		this.hideContent();
		if (!instantly) {
			this.fx.win.start(to).chain(this.showContent.bind(this));
		} else {
			this.win.setStyles(to).setStyle('display', '');
			this.showTimer = this.showContent.delay(50, this);
		}
		return this.reposition();
	},

	toggleListeners: function(state) {
		var fn = (state) ? 'addEvent' : 'removeEvent';
		this.closeBtn[fn]('click', this.bound.close);
		this.overlay[fn]('click', this.bound.close);
		document[fn]('keydown', this.bound.key)[fn]('mousewheel', this.bound.scroll);
		window[fn]('resize', this.bound.window)[fn]('scroll', this.bound.window);
	},

	toggleLoading: function(state) {
		this.isLoading = state;
		this.win[(state) ? 'addClass' : 'removeClass']('sbox-loading');
		if (state) this.fireEvent('onLoading', [this.win]);
	},

	toggleOverlay: function(state) {
		this.overlay.setStyle('display', (state) ? '' : 'none');
		$(document.body)[(state) ? 'addClass' : 'removeClass']('body-overlayed');
	},

	showContent: function() {
		if (this.content.get('opacity')) this.fireEvent('onShow', [this.win]);
		this.fx.content.start(1);
	},

	hideContent: function() {
		if (!this.content.get('opacity')) this.fireEvent('onHide', [this.win]);
		this.fx.content.set(0);
	},

	onKey: function(e) {
		switch (e.key) {
			case 'esc': this.close(e);
			case 'up': case 'down': return false;
		}
	},

	checkTarget: function(e) {
		return this.content.hasChild(e.target);
	},

	reposition: function() {
		var size = document.getSize(), scroll = document.getScroll();
		this.overlay.setStyles({
			left: scroll.x + 'px',
			top: scroll.y + 'px',
			width: size.x + 'px',
			height: size.y + 'px'
		});
		this.win.setStyles({
			left: (scroll.x + (size.x - this.win.offsetWidth) / 2).toInt() + 'px',
			top: (scroll.y + (size.y - this.win.offsetHeight) / 2).toInt() + 'px'
		});
		return this.fireEvent('onMove', [this.overlay, this.win]);
	},

	removeEvents: function(type){
		if (!this.$events) return this;
		if (!type) this.$events = null;
		else if (this.$events[type]) this.$events[type] = null;
		return this;
	},

	extend: function(properties) {
		return $extend(this, properties);
	},

	handlers: new Hash(),

	parsers: new Hash()

};

SqueezeBox.extend(new Events($empty)).extend(new Options($empty)).extend(new Chain($empty));

SqueezeBox.parsers.extend({

	image: function(preset) {
		return (preset || (/\.(?:jpg|png|gif)$/i).test(this.url)) ? this.url : false;
	},

	clone: function(preset) {
		if ($(this.options.target)) return $(this.options.target);
		if (this.element && !this.element.parentNode) return this.element;
		var bits = this.url.match(/#([\w-]+)$/);
		return (bits) ? $(bits[1]) : (preset ? this.element : false);
	},

	ajax: function(preset) {
		return (preset || (this.url && !(/^(?:javascript|#)/i).test(this.url))) ? this.url : false;
	},

	iframe: function(preset) {
		return (preset || this.url) ? this.url : false;
	},

	string: function(preset) {
		return true;
	}
});

SqueezeBox.handlers.extend({

	image: function(url) {

		var size, tmp = new Image();
		this.asset = null;
		tmp.onload = tmp.onabort = tmp.onerror = (function() {
			tmp.onload = tmp.onabort = tmp.onerror = null;
			if (!tmp.width) {
				this.onError.delay(10, this);
				return;
			}
			var box = document.getSize();
			box.x -= this.options.marginImage.x;
			box.y -= this.options.marginImage.y;
			size = {x: tmp.width, y: tmp.height};
			for (var i = 2; i--;) {
				if (size.x > box.x) {
					size.y *= box.x / size.x;
					size.x = box.x;
				} else if (size.y > box.y) {
					size.x *= box.y / size.y;
					size.y = box.y;
				}
			}
			size.x = size.x.toInt();
			size.y = size.y.toInt();
			this.asset = $(tmp);
			tmp = null;
			this.asset.setProperties({width: size.x, height: size.y});
			if (this.isOpen) this.applyContent(this.asset, size);
		}).bind(this);
		tmp.src = url;
		if (tmp && tmp.onload && tmp.complete) tmp.onload();
		return (this.asset) ? [this.asset, size] : null;
	},

	clone: function(el) {
		return el.clone();
	},

	adopt: $arguments(0),

	ajax: function(url) {
		this.asset = new Request.HTML($merge({
			method: 'get'
		}, this.options.ajaxOptions)).addEvents({
			onSuccess: function(resp) {
				this.applyContent(resp);
				this.asset = null;
			}.bind(this),
			onFailure: this.onError.bind(this)
		});
		this.asset.send.delay(10, this.asset, [{url: url}]);
	},

	iframe: function(url) {
		return new Element('iframe', $merge({
			src: url,
			frameBorder: 0,
			width: this.options.size.x,
			height: this.options.size.y
		}, this.options.iframeOptions));
	},

	string: function(str) {
		return str;
	}

});

SqueezeBox.handlers.url = SqueezeBox.handlers.ajax;
SqueezeBox.parsers.url = SqueezeBox.parsers.ajax;
SqueezeBox.parsers.adopt = SqueezeBox.parsers.clone;


window.addEvent('domready', function() {

	(function () {

		/**
		 * That CSS selector will find all <a> elements with the
		 * class boxed
		 *
		 * The example loads the options from the rel attribute
		 */
		SqueezeBox.assign($$('a.boxed', 'input.boxed'), {
			parse: 'rel'
		});

	}).delay(1000);

	/*
		The page isn't supposed to be fully loaded. The DOM is ready when the browser's internal DOM tree has been created, 
		not neccessarily when the browser has finished rendering. Different browsers will fire domready at different times -- 
		Opera for example can be set to render dynamically, so it will render constantly, whether the dom is ready or not.
	*/

});