/**

 * 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;