/**
 * 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
 © 2008-2009 by Harald Kirschner
 Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
THE SOFTWARE.
 * @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;