/*  Facebox for Prototype, version 2.0
 *  By Robert Gaal - http://wakoopa.com 
 *
 *  Heavily based on Facebox by Chris Wanstrath - http://famspam.com/facebox
 *  First ported to Prototype by Phil Burrows - http://blog.philburrows.com
 *
 *  Licensed under the MIT:
 *  http://www.opensource.org/licenses/mit-license.php
 *
 *  Need help?  Join the Google Groups mailing list:
 *  http://groups.google.com/group/facebox/
 *
 *  Dependencies:   prototype & script.aculo.us + images & CSS files from original facebox
 *  Usage:          Append 'rel="facebox"' to an element to call it inside a so-called facebox
 *
 *--------------------------------------------------------------------------*/


var Facebox = Class.create({
  initialize  : function(extra_set){
    this.settings = {
      loading_image : '/images/facebox/loading.gif',
      close_image   : '/images/facebox/closelabel.gif',
      image_types   : new RegExp('\.' + ['png', 'jpg', 'jpeg', 'gif'].join('|') + '$', 'i'),
      inited        : true, 
      facebox_html  : '\
    <div id="facebox" style="display:none;"> \
      <div class="popup"> \
        <table id="facebox_table"> \
          <tbody> \
            <tr> \
              <td class="tl"/><td class="b"/><td class="tr"/> \
            </tr> \
            <tr> \
              <td class="b"/> \
              <td class="body"> \
                <div class="content"> \
                </div> \
                <div class="footer"> \
                  <a href="#" class="close"> \
                    <img src="/images/facebox/closelabel.gif" title="close" class="close_image" /> \
                  </a> \
                </div> \
              </td> \
              <td class="b"/> \
            </tr> \
            <tr> \
              <td class="bl"/><td class="b"/><td class="br"/> \
            </tr> \
          </tbody> \
        </table> \
      </div> \
    </div>'
    };
    if (extra_set) Object.extend(this.settings, extra_set);
    if(!$('facebox')) $(document.body).insert({bottom: this.settings.facebox_html});
    
    this.preload = [ new Image(), new Image() ];
    this.preload[0].src = this.settings.close_image;
    this.preload[1].src = this.settings.loading_image;
    
    f = this;
    $$('#facebox .b:first, #facebox .bl, #facebox .br, #facebox .tl, #facebox .tr').each(function(elem){
      f.preload.push(new Image());
      f.preload.slice(-1).src = elem.getStyle('background-image').replace(/url\((.+)\)/, '$1');
    });
    
    this.facebox = $('facebox');
    this.keyPressListener = this.watchKeyPress.bindAsEventListener(this);
    
    this.watchClickEvents();
    fb = this;
    Event.observe($$('#facebox .close').first(), 'click', function(e){
      Event.stop(e);
      fb.close()
    });
    Event.observe($$('#facebox .close_image').first(), 'click', function(e){
      Event.stop(e);
      fb.close()
    });
  },
  
  watchKeyPress : function(e){
    // Close if espace is pressed or if there's a click outside of the facebox
    if (e.keyCode == 27 || !Event.element(e).descendantOf(this.facebox)) this.close();
  },
  
  watchClickEvents  : function(e){
    var f = this;
    $$('a[rel=facebox]').each(function(elem,i){
      Event.observe(elem, 'click', function(e){
        Event.stop(e);
        f.click_handler(elem, e);
      });
    });
  },
  
  loading : function() {
    if ($$('#facebox .loading').length == 1) return true;
    
    contentWrapper = $$('#facebox .content').first();
    contentWrapper.innerHTML = '';
    contentWrapper.insert({bottom: '<div class="loading"><img src="'+this.settings.loading_image+'"/></div>'});
    
    var pageScroll = document.viewport.getScrollOffsets();
    this.facebox.setStyle({
      'top': pageScroll.top + (document.viewport.getHeight() / 10) + 'px',
      'left': document.viewport.getWidth() / 2 - (this.facebox.getWidth() / 2) + 'px'
    });
    
    Event.observe(document, 'keypress', this.keyPressListener);
    Event.observe(document, 'click', this.keyPressListener);
  },
  
  reveal  : function(data, klass){
    this.loading();
    load = $$('#facebox .loading').first();
    if(load) load.remove();
    
    contentWrapper = $$('#facebox .content').first();
    if (klass) contentWrapper.addClassName(klass);
    contentWrapper.innerHTML = data;
    
    $$('#facebox .body').first().childElements().each(function(elem,i){
     elem.show();
    });
        
    if(!this.facebox.visible()) new Effect.Appear(this.facebox, {duration: .3});
    this.facebox.setStyle({
      'left': document.viewport.getWidth() / 2 - (this.facebox.getWidth() / 2) + 'px'
    });
    
    Event.observe(document, 'keypress', this.keyPressListener);
    Event.observe(document, 'click', this.keyPressListener);
  },
  
  close   : function(){
     new Effect.Fade('facebox', {duration: .3});
  },
  
  click_handler : function(elem, e){
    this.loading();
    Event.stop(e);
    
    // support for rel="facebox[.inline_popup]" syntax, to add a class
    var klass = elem.rel.match(/facebox\[\.(\w+)\]/);
    if (klass) klass = klass[1];
    
    new Effect.Appear(this.facebox, {duration: .3});
    
    if (elem.href.match(/#/)){
      var url     = window.location.href.split('#')[0];
      var target  = elem.href.replace(url+'#','');
      // var data     = $$(target).first();
      var d       = $(target);
      // create a new element so as to not delete the original on close()
      var data = new Element(d.tagName);
      data.innerHTML = d.innerHTML;
      this.reveal(data, klass);
    } else if (elem.href.match(this.settings.image_types)) {
      var image = new Image();
      fb = this;
      image.onload = function() {
        fb.reveal('<div class="image"><img src="' + image.src + '" /></div>', klass)
      }
      image.src = elem.href;
    } else {
      var fb  = this;
      var url = elem.href;
      new Ajax.Request(url, {
        method    : 'get',
        onFailure : function(transport){
          fb.reveal(transport.responseText, klass);
        },
        onSuccess : function(transport){
          fb.reveal(transport.responseText, klass);
        }
      });
      
    }
  }
});

var facebox;
document.observe('dom:loaded', function(){
  facebox = new Facebox();
});