(function ($) {
  Drupal.advanced_forum = Drupal.advanced_forum || {};

  Drupal.behaviors.advanced_forum = {
    attach: function(context) {
      Drupal.advanced_forum.img_expand = Drupal.settings.basePath + Drupal.settings.advanced_forum.modulePath + '/styles/naked/images/container_expand.png';
      Drupal.advanced_forum.img_collapse = Drupal.settings.basePath + Drupal.settings.advanced_forum.modulePath + '/styles/naked/images/container_collapse.png';

      // Retrieve the collapsed status from a stored cookie.
      var collapsed_cookie = $.cookie('Drupal.advanced_forum.collapsed_' + Drupal.encodePath(window.location.pathname));

      //Load the items or a new array if null.
      Drupal.advanced_forum.collapsed_items = collapsed_cookie ? collapsed_cookie.split(/,/) : new Array();

      var handleHeader = $('thead.forum-header th:first-child', context);

      // Set initial collapsed state
      handleHeader.once('forum-header', Drupal.advanced_forum.init);

      $('img', handleHeader).addClass('clickable').click(function() {
        // get forum id
        var id = $(this).closest('thead').attr('id').split('-')[2];

        var imageSource = $(this).attr('src');
        if ( imageSource == Drupal.advanced_forum.img_collapse ) {
          Drupal.advanced_forum.collapse(id);
          // Set collapsed variable
          Drupal.advanced_forum.collapsed_items.push(id);
        }
        else {
          Drupal.advanced_forum.expand(id);
          // Unset collapsed variable
          for (x in Drupal.advanced_forum.collapsed_items) {
            if (Drupal.advanced_forum.collapsed_items[x] == id) {
              Drupal.advanced_forum.collapsed_items.splice(x,1);
            }
          }
        }

        // Save new cookie
        $.cookie(
          'Drupal.advanced_forum.collapsed_' + Drupal.encodePath(window.location.pathname),
          Drupal.advanced_forum.collapsed_items.toString(),
          {
            //path: Drupal.settings.basePath,
            // The cookie should "never" expire.
            expires: 36500
          }
        );
      });
    }
  };

  /**
   * Initialize and set collapsible status
   */
  Drupal.advanced_forum.init = function() {
    // get forum id
    var id = $(this).closest('thead').attr('id').split('-')[2];

    // Check if item is collapsed
    status = false;
    for (x in Drupal.advanced_forum.collapsed_items) {
      if (Drupal.advanced_forum.collapsed_items[x] == id) {
        status = true;
        break;
      }
    }
    if (!status) {
      $(this).append('<img id="forum_collapse_' + id + '" style="margin-left: 10px;" src="' + Drupal.advanced_forum.img_collapse + '"alt="' + Drupal.t('Toggle') + '" />');
      Drupal.advanced_forum.expand(id);
    }
    else {
      $(this).append('<img id="forum_collapse_' + id + '" style="margin-left: 10px;" src="' + Drupal.advanced_forum.img_expand + '"alt="' + Drupal.t('Toggle') + '" />');
      Drupal.advanced_forum.collapse(id);
    }

  };

  Drupal.advanced_forum.collapse = function(id) {
    if (Drupal.settings.advanced_forum.effect == 'toggle') {
      $('#forum_collapse_' + id).attr('src', Drupal.advanced_forum.img_expand).closest('table').children('tbody').hide();
    } else {
      $('#forum_collapse_' + id).attr('src', Drupal.advanced_forum.img_expand).closest('table').children('tbody').fadeOut();
    }
  };

  Drupal.advanced_forum.expand = function(id) {
    if (Drupal.settings.advanced_forum.effect == 'toggle') {
      $('#forum_collapse_' + id).attr('src', Drupal.advanced_forum.img_collapse).closest('table').children('tbody').show();
    } else {
      $('#forum_collapse_' + id).attr('src', Drupal.advanced_forum.img_collapse).closest('table').children('tbody').fadeIn();
    }
  };

})(jQuery);