/**
 * 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;