/**
 * 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);