/**

 * SqueezeBox - Expandable Lightbox

 *

 * Allows to open various content as modal,

 * centered and animated box.

 *

 * Inspired by

 *  ... Lokesh Dhakar	- The original Lightbox v2

 *  ... Cody Lindley	- ThickBox

 *

 * @version		1.0rc1

 *

 * @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: 150, y: 200},

		handler: false,

		adopt: null,

		closeWithOverlay: true,

		zIndex: 65555,

		overlayOpacity: 0.7,

		classWindow: '',

		classOverlay: '',

		disableFx: false,

		onOpen: Class.empty,

		onClose: Class.empty,

		onUpdate: Class.empty,

		onResize: Class.empty,

		onMove: Class.empty,

		onShow: Class.empty,

		onHide: Class.empty,

		fxOverlayDuration: 250,

		fxResizeDuration: 750,

		fxContentDuration: 250,

		ajaxOptions: {}

	},



	initialize: function(options) {

		if (this.options) return this;

		this.presets = $merge(this.presets, options)

		this.setOptions(this.presets);

		this.build();

		this.listeners = {

			window: this.reposition.bind(this, [null]),

			close: this.close.bind(this),

			key: this.onkeypress.bind(this)};

		this.isOpen = this.isLoading = false;

		this.window.close = this.listeners.close;

		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.btnClose = new Element('a', {

			id: 'sbox-btn-close',

			href: '#'

		});

		this.window = new Element('div', {

			id: 'sbox-window',

			styles: {

				display: 'none',

				zIndex: this.options.zIndex + 2

			}

		}).adopt(this.btnClose, this.content);



		if (!window.ie6) {

			this.overlay.setStyles({

				position: 'fixed',

				top: 0,

				left: 0

			});

			this.window.setStyles({

				position: 'fixed',

				top: '50%',

				left: '50%'

			});

		} else {

			this.overlay.style.setExpression('marginTop', 'document.documentElement.scrollTop + "px"');

			this.window.style.setExpression('marginTop', '0 - parseInt(this.offsetHeight / 2) + document.documentElement.scrollTop + "px"');



			this.overlay.setStyles({

				position: 'absolute',

				top: '0%',

				left: '0%'

				//,marginTop: "expression(document.documentElement.scrollTop + 'px')"

			});



			this.window.setStyles({

				position: 'absolute',

				top: '0%',

				left: '0%'

				//,marginTop: "(expression(0 - parseInt(this.offsetHeight / 2) + document.documentElement.scrollTop + 'px')"

			});

		}



		$(document.body).adopt(this.overlay, this.window);



		this.fx = {

			overlay: this.overlay.effect('opacity', {

				duration: this.options.fxOverlayDuration,

				wait: false}).set(0),

			window: this.window.effects({

				duration: this.options.fxResizeDuration,

				wait: false}),

			content: this.content.effect('opacity', {

				duration: this.options.fxContentDuration,

				wait: false}).set(0)

		};

	},



	addClick: function(el) {

		return el.addEvent('click', function() {

			if (this.fromElement(el)) return false;

		}.bind(this));

	},



	fromElement: function(el, options) {

		this.initialize();

		this.element = $(el);

		if (this.element && this.element.rel) options = $merge(options || {}, Json.evaluate(this.element.rel));

		this.setOptions(this.presets, options);

		this.assignOptions();

		this.url = (this.element ? (this.options.url || this.element.href) : el) || '';



		if (this.options.handler) {

			var handler = this.options.handler;

			return this.setContent(handler, this.parsers[handler].call(this, true));

		}

		var res = false;

		for (var key in this.parsers) {

			if ((res = this.parsers[key].call(this))) return this.setContent(key, res);

		}

		return this;

	},



	assignOptions: function() {

		this.overlay.setProperty('class', this.options.classOverlay);

		this.window.setProperty('class', this.options.classWindow);

	},



	close: function(e) {

		if (e) new Event(e).stop();

		if (!this.isOpen) return this;

		this.fx.overlay.start(0).chain(this.toggleOverlay.bind(this));

		this.window.setStyle('display', 'none');

		this.trashImage();

		this.toggleListeners();

		this.isOpen = null;

		this.fireEvent('onClose', [this.content]).removeEvents();

		this.options = {};

		this.setOptions(this.presets).callChain();

		return this;

	},



	onError: function() {

		if (this.image) this.trashImage();

		this.setContent('Error during loading');

	},



	trashImage: function() {

		if (this.image) this.image = this.image.onload = this.image.onerror = this.image.onabort = null;

	},



	setContent: function(handler, content) {

		this.content.setProperty('class', 'sbox-content-' + handler);

		this.applyTimer = this.applyContent.delay(this.fx.overlay.options.duration, this, [this.handlers[handler].call(this, content)]);

		if (this.overlay.opacity) return this;

		this.toggleOverlay(true);

		this.fx.overlay.start(this.options.overlayOpacity);

		this.reposition();

		return this;

	},



	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()[['string', 'array', false].contains($type(content)) ? 'setHTML' : '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 sizes = window.getSize();

		this.size = $merge(this.isLoading ? this.options.sizeLoading : this.options.size, size);

		var to = {

			width: this.size.x,

			height: this.size.y,

			marginLeft: - this.size.x / 2,

			marginTop: - this.size.y / 2

			//left: (sizes.scroll.x + (sizes.size.x - this.size.x - this.options.marginInner.x) / 2).toInt(),

			//top: (sizes.scroll.y + (sizes.size.y - this.size.y - this.options.marginInner.y) / 2).toInt()

		};

		$clear(this.showTimer || null);

		this.hideContent();

		if (!instantly) this.fx.window.start(to).chain(this.showContent.bind(this));

		else {

			this.window.setStyles(to).setStyle('display', '');

			this.showTimer = this.showContent.delay(50, this);

		}

		this.reposition(sizes);

	},



	toggleListeners: function(state) {

		var task = state ? 'addEvent' : 'removeEvent';

		this.btnClose[task]('click', this.listeners.close);

		if (this.options.closeWithOverlay) this.overlay[task]('click', this.listeners.close);

		document[task]('keydown', this.listeners.key);

		window[task]('resize', this.listeners.window);

		window[task]('scroll', this.listeners.window);

	},



	toggleLoading: function(state) {

		this.isLoading = state;

		this.window[state ? 'addClass' : 'removeClass']('sbox-loading');

		if (state) this.fireEvent('onLoading', [this.window]);

	},



	toggleOverlay: function(state) {

		this.overlay.setStyle('display', state ? '' : 'none');

		$(document.body)[state ? 'addClass' : 'removeClass']('body-overlayed');

	},



	showContent: function() {

		if (this.content.opacity) this.fireEvent('onShow', [this.window]);

		this.fx.content.start(1);

	},



	hideContent: function() {

		if (!this.content.opacity) this.fireEvent('onHide', [this.window]);

		this.fx.content.stop().set(0);

	},



	onkeypress: function(e) {

		switch (e.key) {

			case 'esc':

			case 'x':

				this.close();

				break;

		}

	},



	reposition: function(sizes) {

		sizes = sizes || window.getSize();

		this.overlay.setStyles({

			//'left': sizes.scroll.x, 'top': sizes.scroll.y,

			width: sizes.size.x,

			height: sizes.size.y

		});

		/*

		this.window.setStyles({

			left: (sizes.scroll.x + (sizes.size.x - this.window.offsetWidth) / 2).toInt(),

			top: (sizes.scroll.y + (sizes.size.y - this.window.offsetHeight) / 2).toInt()

		});

		*/

		this.fireEvent('onMove', [this.overlay, this.window, sizes]);

	},



	removeEvents: function(type){

		if (!this.$events) return this;

		if (!type) this.$events = null;

		else if (this.$events[type]) this.$events[type] = null;

		return this;

	},



	parsers: {

		'image': function(preset) {

			return (preset || this.url.test(/\.(jpg|jpeg|png|gif|bmp)$/i)) ? this.url : false;

		},

		'adopt': function(preset) {

			if ($(this.options.adopt)) return $(this.options.adopt);

			if (preset || ($(this.element) && !this.element.parentNode)) return $(this.element);

			var bits = this.url.match(/#([\w-]+)$/);

			return bits ? $(bits[1]) : false;

		},

		'url': function(preset) {

			return (preset || (this.url && !this.url.test(/^javascript:/i))) ? this.url: false;

		},

		'iframe': function(preset) {

			return (preset || this.url) ? this.url: false;

		},

		'string': function(preset) {

			return true;

		}

	},



	handlers: {

		'image': function(url) {

			this.image = new Image();

			var events = {

				loaded: function() {

					var win = {x: window.getWidth() - this.options.marginImage.x, y: window.getHeight() - this.options.marginImage.y};

					var size = {x: this.image.width, y: this.image.height};

					for (var i = 0; i < 2; i++)

						if (size.x > win.x) {

							size.y *= win.x / size.x;

							size.x = win.x;

						} else if (size.y > win.y) {

							size.x *= win.y / size.y;

							size.y = win.y;

						}

					size = {x: parseInt(size.x), y: parseInt(size.y)};

					if (window.webkit419) this.image = new Element('img', {'src': this.image.src});

					else $(this.image);

					this.image.setProperties({

						'width': size.x,

						'height': size.y});

					this.applyContent(this.image, size);

				}.bind(this),

				failed: this.onError.bind(this)

			};

			(function() {

				this.src = url;

			}).delay(10, this.image);

			this.image.onload = events.loaded;

			this.image.onerror = this.image.onabort = events.failed;

		},

		'adopt': function(el) {

			return el.clone();

		},

		'url': function(url) {

			this.ajax = new Ajax(url, this.options.ajaxOptions);

			this.ajax.addEvent('onSuccess', function(resp) {

				this.applyContent(resp);

				this.ajax = null;

			}.bind(this));

			this.ajax.addEvent('onFailure', this.onError.bind(this));

			this.ajax.request.delay(10, this.ajax);

		},

		'iframe': function(url) {

			return new Element('iframe', {

				'src': url,

				'frameBorder': 0,

				'width': this.options.size.x,

				'height': this.options.size.y

			});

		},

		'string': function(str) {

			return str;

		}

	},



	extend: $extend

};



SqueezeBox.extend(Events.prototype);

SqueezeBox.extend(Options.prototype);

SqueezeBox.extend(Chain.prototype);