(function ($) {

  Drupal.behaviors.initFaqModule = {
    attach: function (context) {
      // Hide/show answer for a question.
      var faq_hide_qa_accordion = Drupal.settings.faq.faq_hide_qa_accordion;
      $('div.faq-dd-hide-answer', context).addClass("collapsible collapsed");

      if (!faq_hide_qa_accordion) {
        $('div.faq-dd-hide-answer:not(.faq-processed)', context).addClass('faq-processed').hide();
      }
      $('div.faq-dt-hide-answer:not(.faq-processed)', context).addClass('faq-processed').click(function() {
        if (faq_hide_qa_accordion) {
          $('div.faq-dt-hide-answer').not($(this)).removeClass('faq-qa-visible');
        }
        $(this).toggleClass('faq-qa-visible');
        $(this).parent().addClass('faq-viewed');
        $('div.faq-dd-hide-answer').not($(this).next('div.faq-dd-hide-answer')).addClass("collapsed");
        if (!faq_hide_qa_accordion) {
          $(this).next('div.faq-dd-hide-answer').slideToggle('fast', function() {
            $(this).parent().toggleClass('expanded');
          });
        }
        $(this).next('div.faq-dd-hide-answer').toggleClass("collapsed");

        // Change the fragment, too, for permalink/bookmark.
        // To keep the current page from scrolling, refs
        // http://stackoverflow.com/questions/1489624/modifying-document-location-hash-without-page-scrolling/1489802#1489802
        var hash = $(this).find('a').attr('id');
        var fx, node = $('#' + hash);
        if (node.length) {
          fx = $('<div></div>')
            .css({position: 'absolute', visibility: 'hidden', top: $(window).scrollTop() + 'px'})
            .attr('id', hash)
            .appendTo(document.body);
          node.attr('id', '');
        }
        document.location.hash = hash;
        if (node.length) {
          fx.remove();
          node.attr('id', hash);
        }

        // Scroll the page if the collapsed FAQ is not visible.
        // If we have the toolbar so the title may be hidden by the bar.
        var mainScrollTop = Math.max($('html', context).scrollTop(), $('body', context).scrollTop());
        // We compute mainScrollTop because the behaviour is different on FF, IE and CR
        if (mainScrollTop > $(this).offset().top) {
          $('html, body', context).animate({
            scrollTop: $(this).offset().top
          }, 1);
        }
        
        return false;
      });

      // Show any question identified by a fragment
      if (/^#\w+$/.test(document.location.hash)) {
        $('div.faq-dt-hide-answer ' + document.location.hash).parents('.faq-dt-hide-answer').triggerHandler('click');
      }

      // Hide/show q/a for a category.
      var faq_category_hide_qa_accordion = Drupal.settings.faq.faq_category_hide_qa_accordion;
      $('div.faq-qa-hide', context).addClass("collapsible collapsed");
      if (!faq_category_hide_qa_accordion) {
        $('div.faq-qa-hide', context).hide();
      }
      $('div.faq-qa-header .faq-header:not(.faq-processed)', context).addClass('faq-processed').click(function() {
        var $this = $(this);
        if (faq_category_hide_qa_accordion) {
          $('.faq-category-qa-visible').not($('.faq-category-qa-visible').closest('.faq-category-group').has($this).children('div.faq-qa-hide')).removeClass('faq-category-qa-visible');
        }
        $(this).toggleClass('faq-category-qa-visible');
        $('div.faq-qa-hide').not($this.parent().siblings('div.faq-qa-hide')).not($('div.faq-qa-hide').closest('.faq-category-group').has($this).children('div.faq-qa-hide')).addClass("collapsed");
        if (!faq_category_hide_qa_accordion) {
          $this.parent().siblings('div.faq-qa-hide').slideToggle('fast', function() {
            $(this).parent().toggleClass('expanded');
          });
        }
        $this.parent().siblings('div.faq-qa-hide').toggleClass("collapsed");

        // Scroll the page if the collapsed FAQ is not visible.
        // If we have the toolbar so the title may be hidden by the bar.
        var mainScrollTop = Math.max($('html', context).scrollTop(), $('body', context).scrollTop());
        // We compute mainScrollTop because the behaviour is different on FF, IE and CR
        if (mainScrollTop > $this.offset().top) {
          $('html, body', context).animate({
            scrollTop: $this.offset().top
          }, 1);
        }
        
        return false;
      });


      // Show expand all link.
      if (!faq_hide_qa_accordion && !faq_category_hide_qa_accordion) {
        $('#faq-expand-all', context).show();
        $('#faq-expand-all a.faq-expand-all-link', context).show();

        // Add collapse link click event.
        $('#faq-expand-all a.faq-collapse-all-link:not(.faq-processed)', context).addClass('faq-processed').click(function () {
          $(this).hide();
          $('#faq-expand-all a.faq-expand-all-link').show();
          $('div.faq-qa-hide').slideUp('slow', function() {
            $(this).removeClass('expanded');
          });
          $('div.faq-dd-hide-answer').slideUp('slow', function() {
            $(this).removeClass('expanded');
          });
        });

        // Add expand link click event.
        $('#faq-expand-all a.faq-expand-all-link:not(.faq-processed)', context).addClass('faq-processed').click(function () {
          $(this).hide();
          $('#faq-expand-all a.faq-collapse-all-link').show();
          $('div.faq-qa-hide').slideDown('slow', function() {
            $(this).addClass('expanded');
          });
          $('div.faq-dd-hide-answer').slideDown('slow', function() {
            $(this).addClass('expanded');
          });
        });
      }
    }
  };
})(jQuery);