/*

 *
 * Usage:
 *  
 *  jQuery(document).ready(function() {
 *    jQuery('a[rel*=overlayBox]').overlayBox() 
 *  })
 *
 *  <a href="#terms" rel="overlayBox">Terms</a>
 *    Loads the #terms div in the box
 *
 *  <a href="terms.html" rel="overlayBox">Terms</a>
 *    Loads the terms.html page in the box
 *
 *  <a href="terms.png" rel="overlayBox">Terms</a>
 *    Loads the terms.png image in the box
 *
 *
 *  You can also use it programmatically:
 * 
 *    jQuery.overlayBox('some html')
 *
 *  The above will open a overlayBox with "some html" as the content.
 *    
 *    jQuery.overlayBox(function($j) { 
 *      $j.get('blah.html', function(data) { $j.overlayBox(data) })
 *    })
 *
 *  The above will show a loading screen before the passed function is called,
 *  allowing for a better ajaxy experience.
 *
 *  The overlayBox function can also display an ajax page or image:
 *  
 *    jQuery.overlayBox({ ajax: 'remote.html' })
 *    jQuery.overlayBox({ image: 'dude.jpg' })
 *
 *  Want to close the overlayBox?  Trigger the 'close.overlayBox' document event:
 *
 *    jQuery(document).trigger('close.overlayBox')
 *
 *  overlayBox also has a bunch of other hooks:
 *
 *    loading.overlayBox
 *    beforeReveal.overlayBox
 *    reveal.overlayBox (aliased as 'afterReveal.overlayBox')
 *    init.overlayBox
 *
 *  Simply bind a function to any of these hooks:
 *
 *   $j(document).bind('reveal.overlayBox', function() { ...stuff to do after the overlayBox and contents are revealed... })
 *
 */
(function($j) {
  $j.overlayBox = function(data, klass) {
    $j.overlayBox.loading()

    if (data.ajax) filloverlayBoxFromAjax(data.ajax)
    else if (data.image) filloverlayBoxFromImage(data.image)
    else if (data.div) filloverlayBoxFromHref(data.div)
    else if ($j.isFunction(data)) data.call($j)
    else $j.overlayBox.reveal(data, klass)
  }

  /*
   * Public, $j.overlayBox methods
   */

  $j.extend($j.overlayBox, {
    settings: {
      opacity      : 0.2,
      overlay      : true,
      loadingImage : 'images/jqpopup/preloader.gif',
      closeImage   : 'images/jqpopup/close.png',
      imageTypes   : [ 'png', 'jpg', 'jpeg', 'gif' ],
      overlayBoxHtml  : '\
    <div id="overlayBox" style="display:none;"> \
      <div class="popup"> \
        <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="closeIcon"> \
                  <a href="#" class="close"> \
                    <img src="images/jqpopup/close.png" 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>'
    },

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

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

      $j('#overlayBox').css({
        top:	getPageScroll()[1] + (getPageHeight() / 10),
        left:	385.5
      }).show()

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

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

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

  /*
   * Public, $j.fn methods
   */

  $j.fn.overlayBox = function(settings) {
    init(settings)

    function clickHandler() {
      $j.overlayBox.loading(true)

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

      filloverlayBoxFromHref(this.href, klass)
      return false
    }

    return this.click(clickHandler)
  }

  /*
   * Private methods
   */

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

    $j(document).trigger('init.overlayBox')
    makeCompatible()

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

    if (settings) $j.extend($j.overlayBox.settings, settings)
    $j('body').append($j.overlayBox.settings.overlayBoxHtml)

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

    $j('#overlayBox').find('.b:first, .bl, .br, .tl, .tr').each(function() {
      preload.push(new Image())
      preload.slice(-1).src = $j(this).css('background-image').replace(/url\((.+)\)/, '$j1')
    })

    $j('#overlayBox .close').click($j.overlayBox.close)
    $j('#overlayBox .close_image').attr('src', $j.overlayBox.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 $js = $j.overlayBox.settings

    $js.loadingImage = $js.loading_image || $js.loadingImage
    $js.closeImage = $js.close_image || $js.closeImage
    $js.imageTypes = $js.image_types || $js.imageTypes
    $js.overlayBoxHtml = $js.overlayBox_html || $js.overlayBoxHtml
  }

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

    // image
    } else if (href.match($j.overlayBox.settings.imageTypesRegexp)) {
      filloverlayBoxFromImage(href, klass)
    // ajax
    } else {
      filloverlayBoxFromAjax(href, klass)
    }
  }

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

  function filloverlayBoxFromAjax(href, klass) {
    $j.get(href, function(data) { $j.overlayBox.reveal(data, klass) })
  }

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

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

    if ($j('overlayBox_overlay').length == 0) 
      $j("body").append('<div id="overlayBox_overlay" class="overlayBox_hide"></div>')

    $j('#overlayBox_overlay').hide().addClass("overlayBox_overlayBG")
      .css('opacity', $j.overlayBox.settings.opacity)
      .click(function() { $j(document).trigger('close.overlayBox') })
      .fadeIn(200)
    return false
  }

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

    $j('#overlayBox_overlay').fadeOut(200, function(){
      $j("#overlayBox_overlay").removeClass("overlayBox_overlayBG")
      $j("#overlayBox_overlay").addClass("overlayBox_hide") 
      $j("#overlayBox_overlay").remove()
    })
    
    return false
  }

  /*
   * Bindings
   */

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

})(jQuery);