/**
 * SqueezeBox - Expandable Lightbox
 * 
 * Allows to open various content as modal, centered and animated box.
 * 
 * Dependencies: MooTools 1.2
 * 
 * Inspired by ... Lokesh Dhakar - The original Lightbox v2
 * 
 * @version 1.1 rc4
 * 
 * @license MIT-style license
 * @author Harald Kirschner <mail [at] digitarald.de>
 * @copyright Author
 */

var SqueezeBox = {

	presets : {
		onOpen :$empty,
		onClose :$empty,
		onUpdate :$empty,
		onResize :$empty,
		onMove :$empty,
		onShow :$empty,
		onHide :$empty,
		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,
		shadow :true,
		document :null,
		ajaxOptions : {}
	},

	initialize : function(presets) {
		if (this.options)
			return this;

		this.presets = $merge(this.presets, presets);
		this.doc = this.presets.document || document;
		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.win = new Element('div', {
			id :'sbox-window',
			styles : {
				display :'none',
				zIndex :this.options.zIndex + 2
			}
		});
		if (this.options.shadow) {
			if (Browser.Engine.webkit420) {
				this.win.setStyle('-webkit-box-shadow',
						'0 0 10px rgba(0, 0, 0, 0.7)');
			} else if (!Browser.Engine.trident4) {
				var shadow = new Element('div', {
					'class' :'sbox-bg-wrap'
				}).inject(this.win);
				var relay = function(e) {
					this.overlay.fireEvent('click', [ e ]);
				}.bind(this);
				[ 'n', 'ne', 'e', 'se', 's', 'sw', 'w', 'nw' ].each( function(
						dir) {
					new Element('div', {
						'class' :'sbox-bg sbox-bg-' + dir
					}).inject(shadow).addEvent('click', relay);
				});
			}
		}
		this.content = new Element('div', {
			id :'sbox-content'
		}).inject(this.win);
		this.closeBtn = new Element('a', {
			id :'sbox-btn-close',
			href :'#'
		}).inject(this.win);
		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)
		};
		$(this.doc.body).adopt(this.overlay, this.win);
	},

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

	open : function(subject, options) {
		this.initialize();

		if (this.element != null)
			this.trash();
		this.element = $(subject) || false;
		this.setOptions($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.url = ((this.element) ? (this.element.get('href')) : subject)
				|| this.options.url || '';

		this.assignOptions();

		var handler = handler || this.options.handler;
		if (handler)
			return this.setContent(handler, this.parsers[handler].call(this,
					true));
		var ret = false;
		return this.parsers.some( function(parser, key) {
			var content = parser.call(this);
			if (content) {
				ret = this.setContent(key, content);
				return true;
			}
			return false;
		}, this);
	},

	fromElement : function(from, options) {
		return this.open(from, options);
	},

	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.fireEvent('onClose', [ this.content ]);
		this.trash();
		this.toggleListeners();
		this.isOpen = false;
		return this;
	},

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

	onError : function() {
		this.asset = null;
		this.setContent('string', this.options.errorMsg || 'An error occurred');
	},

	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) {
		if (!this.isOpen && !this.applyTimer)
			return;
		this.applyTimer = $clear(this.applyTimer);
		this.hideContent();
		if (!content) {
			this.toggleLoading(true);
		} else {
			if (this.isLoading)
				this.toggleLoading(false);
			this.fireEvent('onUpdate', [ this.content ], 20);
		}
		if (content) {
			if ( [ 'string', 'array' ].contains($type(content)))
				this.content.set('html', content);
			else if (!this.content.hasChild(content))
				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) {
		this.showTimer = $clear(this.showTimer || null);
		var box = this.doc.getSize(), scroll = this.doc.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()
		};
		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);
		this.doc[fn]('keydown', this.bound.key)[fn]('mousewheel',
				this.bound.scroll);
		this.doc.getWindow()[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) {
		var full = this.doc.getSize().x;
		this.overlay.setStyle('display', (state) ? '' : 'none');
		this.doc.body[(state) ? 'addClass' : 'removeClass']('body-overlayed');
		if (state) {
			this.scrollOffset = this.doc.getWindow().getSize().x - full;
			this.doc.body.setStyle('margin-right', this.scrollOffset);
		} else {
			this.doc.body.setStyle('margin-right', '');
		}
	},

	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.cancel().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 = this.doc.getSize(), scroll = this.doc.getScroll(), ssize = this.doc
				.getScrollSize();
		this.overlay.setStyles( {
			width :ssize.x + 'px',
			height :ssize.y + 'px'
		});
		this.win
				.setStyles( {
					left :(scroll.x + (size.x - this.win.offsetWidth) / 2 - this.scrollOffset)
							.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 = this.doc.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.width = size.x;
			this.asset.height = size.y;
			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) {
		if (el)
			return el.clone();
		return this.onError();
	},

	adopt : function(el) {
		if (el)
			return el;
		return this.onError();
	},

	ajax : function(url) {
		var options = this.options.ajaxOptions || {};
		this.asset = new Request.HTML($merge( {
			method :'get',
			evalScripts :false
		}, this.options.ajaxOptions)).addEvents( {
			onSuccess : function(resp) {
				this.applyContent(resp);
				if (options.evalScripts !== null && !options.evalScripts)
					$exec(this.asset.response.javascript);
				this.fireEvent('onAjax', [ resp, this.asset ]);
				this.asset = null;
			}.bind(this),
			onFailure :this.onError.bind(this)
		});
		this.asset.send.delay(10, this.asset, [ {
			url :url
		} ]);
	},

	iframe : function(url) {
		this.asset = new Element('iframe', $merge( {
			src :url,
			frameBorder :0,
			width :this.options.size.x,
			height :this.options.size.y
		}, this.options.iframeOptions));
		if (this.options.iframePreload) {
			this.asset.addEvent('load', function() {
				this.applyContent(this.asset.setStyle('display', ''));
			}.bind(this));
			this.asset.setStyle('display', 'none').inject(this.content);
			return false;
		}
		return this.asset;
	},

	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() {
	SqueezeBox.initialize({
		handler :'iframe',
		zIndex: 900,
		iframePreload :true
	});
	SqueezeBox.assign($$("a.squeeze"), {parse:'rel'});

});