(function($) {
  $.facebox = function(url, data) {
    $.facebox.loading();
    fillFaceboxFromHref(url, data);
  }

  /*
   * Public, $.facebox methods
   */

  $.extend($.facebox, {
    settings: {
      opacity      : 0.4,
      overlay      : true,
      imageTypes   : [ 'png', 'jpg', 'jpeg', 'gif' ],
      faceboxHtml  : '\
    <div id="facebox" style="display:none;"> \
      <div id="facebox_popup"> \
        <table class="facebox"> \
          <tbody> \
            <tr> \
              <td id="facebox_body"> \
                <div id="facebox_content"> \
                </div> \
                <div id="facebox_footer"> \
                  <a href="#" id="facebox_close"> \
                    <span id="facebox_close_image">&nbsp;</span> \
                  </a> \
                </div> \
              </td> \
            </tr> \
          </tbody> \
        </table> \
      </div> \
    </div>'
    },
	
    coverloading: function() {
      init();
      if ($('#facebox .loading').length == 1) return true;
      showCoverOverlay();

      $('#facebox_content').empty();
      $('#facebox_body').children().hide().end().append('<div class="loading">&nbsp;</div>');

      $('#facebox').css({
        top:	getPageScroll()[1] + (getPageHeight() / 3),
        left:	$(window).width() / 2 - ($('#facebox').width() / 2)
      }).show();
	  
	  $(document).trigger('coverloading.facebox');
    },

    loading: function() {
      init();
      //if ($('#facebox .loading').length == 1) return true;
      showOverlay();

      $('#facebox_content').empty();
      $('#facebox_body').children().hide().end().append('<div class="loading">&nbsp;</div>');

      $('#facebox').css({
        top:	getPageScroll()[1] + (getPageHeight() / 3),
        left:	$(window).width() / 2 - ($('#facebox').width() / 2)
      }).show();

      $(document).bind('keydown.facebox', function(e) {
        if (e.keyCode == 27) $.facebox.close();
        return true;
      });
      $(document).trigger('loading.facebox');
    },
	
    reveal: function(data) {
      $(document).trigger('beforeReveal.facebox');
      $('#facebox_content').append(data);
      $('#facebox .loading').remove();
      $('#facebox_body').children().fadeIn('normal');
      $('#facebox').css({
        top:	getPageScroll()[1] + (getPageHeight() / 15),
        left:	$(window).width() / 2 - ($('#facebox').width() / 2)
      })
      $(document).trigger('reveal.facebox').trigger('afterReveal.facebox');
    },

    close: function() {
      $(document).trigger('close.facebox');
      return false;
    }
  })

  /*
   * Public, $.fn methods
   */

  $.fn.facebox = function(settings) {
    init(settings);
  }

  /*
   * Private methods
   */

  // called one time to setup facebox on this page
  function init(settings) {
    if ($.facebox.settings.inited) return true;
    else $.facebox.settings.inited = true;

    $(document).trigger('init.facebox');

    var imageTypes = $.facebox.settings.imageTypes.join('|');
    $.facebox.settings.imageTypesRegexp = new RegExp('\.' + imageTypes + '$', 'i');

    if (settings) $.extend($.facebox.settings, settings);
    $('body').append($.facebox.settings.faceboxHtml);

    $('#facebox_close').click($.facebox.close);
  }
  
  // getPageScroll() by quirksmode.com
  function getPageScroll() {
    var xScroll, yScroll;
    if (self.pageYOffset) {
      yScroll = self.pageYOffset;
      xScroll = self.pageXOffset;
    } else if (document.documentElement && document.documentElement.scrollTop) {	 // Explorer 6 Strict
      yScroll = document.documentElement.scrollTop;
      xScroll = document.documentElement.scrollLeft;
    } else if (document.body) {// all other Explorers
      yScroll = document.body.scrollTop;
      xScroll = document.body.scrollLeft;	
    }
    return new Array(xScroll,yScroll);
  }

  // Adapted from getPageSize() by quirksmode.com
  function getPageHeight() {
    var windowHeight;
    if (self.innerHeight) {	// all except Explorer
      windowHeight = self.innerHeight;
    } else if (document.documentElement && document.documentElement.clientHeight) { // Explorer 6 Strict Mode
      windowHeight = document.documentElement.clientHeight;
    } else if (document.body) { // other Explorers
      windowHeight = document.body.clientHeight;
    }	
    return windowHeight;
  }

  // Figures out what you want to display and displays it
  // formats are:
  // div: #id
  // image: blah.extension
  // ajax: anything else
  function fillFaceboxFromHref(href, data) {
    // div
    if (href.match(/#/)) {
      var url    = window.location.href.split('#')[0];
      var target = href.replace(url,'');
      $.facebox.reveal($(target).clone().show());
    // image
    } else if (href.match($.facebox.settings.imageTypesRegexp)) {
      fillFaceboxFromImage(href);
    // ajax
    } else {
      fillFaceboxFromAjax(href, data);
    }
  }

  function fillFaceboxFromImage(href) {
    var image = new Image();
    image.onload = function() {
      $.facebox.reveal('<div class="image"><img src="' + image.src + '" /></div>');
    }
    image.src = href;
  }

  function fillFaceboxFromAjax(href, subdata) {
    $.post(href, subdata, function(data) { $.facebox.reveal(data) });
  }

  function skipOverlay() {
    return $.facebox.settings.overlay == false || $.facebox.settings.opacity === null ;
  }
  
  function showCoverOverlay() {
    if (skipOverlay()) return;

    if ($('facebox_overlay').length == 0) 
      $("body").append('<div id="facebox_overlay" class="facebox_hide"></div>');

    $('#facebox_overlay').hide().addClass("facebox_overlayBG")
    .css({
		'opacity': $.facebox.settings.opacity,
		'height': document.body.scrollHeight > window.screen.height ? document.body.scrollHeight : window.screen.height + 'px'
	})
      .fadeIn(200);
    return false;
  }

  function showOverlay() {
    if (skipOverlay()) return;

    if ($('facebox_overlay').length == 0) 
      $("body").append('<div id="facebox_overlay" class="facebox_hide"></div>');

    $('#facebox_overlay').hide().addClass("facebox_overlayBG")
    .css({
		'opacity': $.facebox.settings.opacity,
		'height': document.body.scrollHeight > window.screen.height ? document.body.scrollHeight : window.screen.height + 'px'
	})
      .click(function() { $(document).trigger('close.facebox') })
      .fadeIn(200);
    return false;
  }

  function hideOverlay() {
    if (skipOverlay()) return;

    $('#facebox_overlay').fadeOut(200, function(){
      $("#facebox_overlay").removeClass("facebox_overlayBG");
      $("#facebox_overlay").addClass("facebox_hide") ;
      $("#facebox_overlay").remove();
    });
    
    return false;
  }

  /*
   * Bindings
   */

  $(document).bind('close.facebox', function() {
    $(document).unbind('keydown.facebox');
    $('#facebox').fadeOut(function() {
      $('#facebox_content').removeClass().addClass('content');
      hideOverlay();
      $('#facebox .loading').remove();
    });
  });

})(jQuery);