(function($) {
  $.popbox = function(data, klass) {
    $.popbox.loading()

    if (data.ajax) fillpopboxFromAjax(data.ajax)
    else if (data.image) fillpopboxFromImage(data.image)
    else if (data.div) fillpopboxFromHref(data.div)
    else if ($.isFunction(data)) data.call($)
    else $.popbox.reveal(data, klass)
  }

  /*
   * Public, $.popbox methods
   */

  $.extend($.popbox, {
    settings: {
      opacity      : 0,
      overlay      : true,
      loadingImage : 'images/ajaxLoad.gif',
      closeImage   : 'images/closelabel.gif',
      imageTypes   : [ 'png', 'jpg', 'jpeg', 'gif' ],
      popboxHtml  : '\
    <div id="popbox" style="display:none;"> \
      <div class="popup"> \
        <input class="spanpopup" type="button" onclick="javascript:closebox()" value="X"> \
        <table bgcolor=white> \
            <tr> \
              <td class="body"> \
                <div class="content"> \
                </div> \
              </td> \
            </tr> \
        </table> \
      </div> \
    </div>'
    },

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

      $('#popbox .content').empty()
      $('#popbox .body').children().hide().end().
        append('<div class="loading"><img src="'+$.popbox.settings.loadingImage+'"/></div>')

      $('#popbox').css({
        top:	getPageScroll()[1] + (getPageHeight() / 3),
        left:	385.5
      }).show()

      $(document).bind('keydown.popbox', function(e) {
        if (e.keyCode == 27) $.popbox.close()
        return true
      })
      $(document).trigger('loading.popbox')
    },

    reveal: function(data, klass) {
      $(document).trigger('beforeReveal.popbox')
      if (klass) $('#popbox .content').addClass(klass)
      $('#popbox .content').append(data)
      $('#popbox .loading').remove()
      $('#popbox .body').children().fadeIn('normal')
      $('#popbox').css('left', $(window).width() / 2 - ($('#popbox table').width() / 2))
      $(document).trigger('reveal.popbox').trigger('afterReveal.popbox')
    },

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

  /*
   * Public, $.fn methods
   */

  $.fn.popbox = function(settings) {
    init(settings)

    function clickHandler() {
      $.popbox.loading(true)

      // support for rel="popbox.inline_popup" syntax, to add a class
      // also supports deprecated "popbox[.inline_popup]" syntax
      var klass = this.rel.match(/popbox\[?\.(\w+)\]?/)
      if (klass) klass = klass[1]

      fillpopboxFromHref(this.href, klass)
      return false
    }

    return this.click(clickHandler)
  }

  /*
   * Private methods
   */

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

    $(document).trigger('init.popbox')
    makeCompatible()

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

    if (settings) $.extend($.popbox.settings, settings)
    $('body').append($.popbox.settings.popboxHtml)

    var preload = [ new Image(), new Image() ]
    preload[0].src = $.popbox.settings.closeImage
    preload[1].src = $.popbox.settings.loadingImage

    $('#popbox').find('.b:first, .bl, .br, .tl, .tr').each(function() {
      preload.push(new Image())
      preload.slice(-1).src = $(this).css('background-image').replace(/url\((.+)\)/, '$1')
    })

    $('#popbox .close').click($.popbox.close)
    $('#popbox .close_image').attr('src', $.popbox.settings.closeImage)
  }
  
  // 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
  }

  // Backwards compatibility
  function makeCompatible() {
    var $s = $.popbox.settings

    $s.loadingImage = $s.loading_image || $s.loadingImage
    $s.closeImage = $s.close_image || $s.closeImage
    $s.imageTypes = $s.image_types || $s.imageTypes
    $s.popboxHtml = $s.popbox_html || $s.popboxHtml
  }

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

    // image
    } else if (href.match($.popbox.settings.imageTypesRegexp)) {
      fillpopboxFromImage(href, klass)
    // ajax
    } else {
      fillpopboxFromAjax(href, klass)
    }
  }

  function fillpopboxFromImage(href, klass) {
    var image = new Image()
    image.onload = function() {
      $.popbox.reveal('<div class="image"><img src="' + image.src + '" /></div>', klass)
    }
    image.src = href
  }

  function fillpopboxFromAjax(href, klass) {
    $.get(href, function(data) { $.popbox.reveal(data, klass) })
  }

  function skipOverlay() {
    return $.popbox.settings.overlay == false || $.popbox.settings.opacity === null 
  }

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

    if ($('popbox_overlay').length == 0) 
      $("body").append('<div id="popbox_overlay" class="popbox_hide"></div>')

    $('#popbox_overlay').hide().addClass("popbox_overlayBG")
      .css('opacity', $.popbox.settings.opacity)
      .click(function() { $(document).trigger('close.popbox') })
      .fadeIn(200)
    return false
  }

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

    $('#popbox_overlay').fadeOut(200, function(){
      $("#popbox_overlay").removeClass("popbox_overlayBG")
      $("#popbox_overlay").addClass("popbox_hide") 
      $("#popbox_overlay").remove()
    })
    
    return false
  }

  /*
   * Bindings
   */

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

})(jQuery);