(function ($) {

Drupal.ModuleFilter.tabs = {};
Drupal.ModuleFilter.enabling = {};
Drupal.ModuleFilter.disabling = {};

Drupal.ModuleFilter.jQueryIsNewer = function() {
  if (Drupal.ModuleFilter.jQueryNewer == undefined) {
    var v1parts = $.fn.jquery.split('.');
    var v2parts = new Array('1', '4', '4');

    for (var i = 0; i < v1parts.length; ++i) {
      if (v2parts.length == i) {
        Drupal.ModuleFilter.jQueryNewer = true;
        return Drupal.ModuleFilter.jQueryNewer;
      }

      if (v1parts[i] == v2parts[i]) {
        continue;
      }
      else if (v1parts[i] > v2parts[i]) {
        Drupal.ModuleFilter.jQueryNewer = true;
        return Drupal.ModuleFilter.jQueryNewer;
      }
      else {
        Drupal.ModuleFilter.jQueryNewer = false;
        return Drupal.ModuleFilter.jQueryNewer;
      }
    }

    if (v1parts.length != v2parts.length) {
      Drupal.ModuleFilter.jQueryNewer = false;
      return Drupal.ModuleFilter.jQueryNewer;
    }

    Drupal.ModuleFilter.jQueryNewer = false;
  }
  return Drupal.ModuleFilter.jQueryNewer;
};

Drupal.behaviors.moduleFilterTabs = {
  attach: function(context) {
    if (Drupal.settings.moduleFilter.tabs) {
      $('#module-filter-wrapper table:not(.sticky-header)', context).once('module-filter-tabs', function() {
        var $modules = $('#module-filter-modules');
        var moduleFilter = $('input[name="module_filter[name]"]').data('moduleFilter');
        var table = $(this);

        $('thead', table).show();

        // Remove package header rows.
        $('tr.admin-package-header', table).remove();

        var $tabsWrapper = $('<div id="module-filter-tabs"></div>');

        // Build tabs from package title rows.
        var tabs = '<ul>';
        for (var i in Drupal.settings.moduleFilter.packageIDs) {
          var id = Drupal.checkPlain(Drupal.settings.moduleFilter.packageIDs[i]);

          var name = id;
          var tabClass = 'project-tab';
          var title = null;
          var summary = (Drupal.settings.moduleFilter.countEnabled) ? '<span class="count">' + Drupal.ModuleFilter.countSummary(id) + '</span>' : '';

          switch (id) {
            case 'all':
              name = Drupal.t('All');
              break;
            case 'new':
              name = Drupal.t('New');
              title = Drupal.t('Modules installed within the last week.');
              if (Drupal.settings.moduleFilter.enabledCounts['new'].total == 0) {
                tabClass += ' disabled';
                summary += '<span>' + Drupal.t('No modules added within the last week.') + '</span>';
              }
              break;
            case 'recent':
              name = Drupal.t('Recent');
              title = Drupal.t('Modules enabled/disabled within the last week.');
              if (Drupal.settings.moduleFilter.enabledCounts['recent'].total == 0) {
                tabClass += ' disabled';
                summary += '<span>' + Drupal.t('No modules were enabled or disabled within the last week.') + '</span>';
              }
              break;
            default:
              var $row = $('#' + id + '-package', this);
              name = Drupal.checkPlain($.trim($row.text()));
              $row.remove();
              break;
          }

          tabs += '<li id="' + id + '-tab" class="' + tabClass + '"><a href="#' + id + '" class="overlay-exclude"' + (title ? ' title="' + title + '"' : '') + '><strong>' + name + '</strong><span class="summary">' + summary + '</span></a></li>';
        }
        tabs += '</ul>';
        $tabsWrapper.append(tabs);
        $modules.before($tabsWrapper);

        // Index tabs.
        $('#module-filter-tabs li').each(function() {
          var $tab = $(this);
          var id = $tab.attr('id');
          Drupal.ModuleFilter.tabs[id] = new Drupal.ModuleFilter.Tab($tab, id);
        });

        $('tbody td.checkbox input', $modules).change(function() {
          var $checkbox = $(this);
          var key = $checkbox.parents('tr').data('indexKey');

          moduleFilter.index[key].status = $checkbox.is(':checked');

          if (Drupal.settings.moduleFilter.visualAid) {
            var type = ($checkbox.is(':checked')) ? 'enable' : 'disable';
            Drupal.ModuleFilter.updateVisualAid(type, $checkbox.parents('tr'));
          }
        });

        // Sort rows.
        var rows = $('tbody tr.module', table).get();
        rows.sort(function(a, b) {
          var compA = $('td:nth(1)', a).text().toLowerCase();
          var compB = $('td:nth(1)', b).text().toLowerCase();
          return (compA < compB) ? -1 : (compA > compB) ? 1 : 0;
        });
        $.each(rows, function(idx, itm) { table.append(itm); });

        // Re-stripe rows.
        $('tr.module', table)
          .removeClass('odd even')
          .filter(':odd').addClass('even').end()
          .filter(':even').addClass('odd');

        moduleFilter.adjustHeight();

        moduleFilter.element.bind('moduleFilter:start', function() {
          moduleFilter.tabResults = {
            'all-tab': { items: {}, count: 0 },
            'recent-tab': { items: {}, count: 0 },
            'new-tab': { items: {}, count: 0 }
          };

          // Empty result info from tabs.
          for (var i in Drupal.ModuleFilter.tabs) {
            if (Drupal.ModuleFilter.tabs[i].resultInfo != undefined) {
              Drupal.ModuleFilter.tabs[i].resultInfo.empty();
            }
          }
        });

        moduleFilter.element.bind('moduleFilter:finish', function(e, data) {
          $.each(moduleFilter.index, function(key, item) {
            if (!item.element.hasClass('js-hide')) {
              var id = Drupal.ModuleFilter.getTabID(item.element);

              if (moduleFilter.tabResults[id] == undefined) {
                moduleFilter.tabResults[id] = { items: {}, count: 0 };
              }
              if (moduleFilter.tabResults[id].items[item.key] == undefined) {
                // All tab
                moduleFilter.tabResults['all-tab'].count++;

                // Recent tab
                if (item.element.hasClass('recent-module')) {
                  moduleFilter.tabResults['recent-tab'].count++;
                }

                // New tab
                if (item.element.hasClass('new-module')) {
                  moduleFilter.tabResults['new-tab'].count++;
                }

                moduleFilter.tabResults[id].items[item.key] = item;
                moduleFilter.tabResults[id].count++;
              }

              if (Drupal.ModuleFilter.activeTab != undefined && Drupal.ModuleFilter.activeTab.id != 'all-tab') {
                if ((Drupal.ModuleFilter.activeTab.id == 'recent-tab' && !item.element.hasClass('recent-module')) || (Drupal.ModuleFilter.activeTab.id == 'new-tab' && !item.element.hasClass('new-module')) || (Drupal.ModuleFilter.activeTab.id != 'recent-tab' && Drupal.ModuleFilter.activeTab.id != 'new-tab' && id != Drupal.ModuleFilter.activeTab.id)) {
                  // The item is not in the active tab, so hide it.
                  item.element.addClass('js-hide');
                }
              }
            }
          });

          if (Drupal.settings.moduleFilter.visualAid) {
            if (moduleFilter.text) {
              // Add result info to tabs.
              for (var id in moduleFilter.tabResults) {
                var tab = Drupal.ModuleFilter.tabs[id];

                if (tab.resultInfo == undefined) {
                  var resultInfo = '<span class="result-info"></span>'
                  $('a', tab.element).prepend(resultInfo);
                  tab.resultInfo = $('span.result-info', tab.element);
                }

                tab.resultInfo.append(moduleFilter.tabResults[id].count);
              }

              if (Drupal.settings.moduleFilter.hideEmptyTabs) {
                for (var id in Drupal.ModuleFilter.tabs) {
                  if (moduleFilter.tabResults[id] != undefined) {
                    Drupal.ModuleFilter.tabs[id].element.show();
                  }
                  else if (Drupal.ModuleFilter.activeTab == undefined || Drupal.ModuleFilter.activeTab.id != id) {
                    Drupal.ModuleFilter.tabs[id].element.hide();
                  }
                }
              }
            }
            else {
              // Make sure all tabs are visible.
              if (Drupal.settings.moduleFilter.hideEmptyTabs) {
                $('#module-filter-tabs li').show();
              }
            }
          }

          if ((Drupal.ModuleFilter.activeTab != undefined && (moduleFilter.tabResults[Drupal.ModuleFilter.activeTab.id] == undefined || moduleFilter.tabResults[Drupal.ModuleFilter.activeTab.id].count <= 0))) {
            // The current tab contains no results.
            moduleFilter.results = 0;
          }

          moduleFilter.adjustHeight();
        });

        if (Drupal.settings.moduleFilter.useURLFragment) {
          $(window).bind('hashchange.module-filter', $.proxy(Drupal.ModuleFilter, 'eventHandlerOperateByURLFragment')).triggerHandler('hashchange.module-filter');
        }
        else {
          Drupal.ModuleFilter.selectTab();
        }

        if (Drupal.settings.moduleFilter.useSwitch) {
          $('td.checkbox div.form-item', table).hide();
          $('td.checkbox', table).each(function(i) {
            var $cell = $(this);
            var $checkbox = $(':checkbox', $cell);
            var $switch = $('.toggle-enable', $cell);
            $switch.removeClass('js-hide').click(function() {
              if (!$(this).hasClass('disabled')) {
                if (Drupal.ModuleFilter.jQueryIsNewer()) {
                  $checkbox.click();
                  $switch.toggleClass('off');
                }
                else {
                  $checkbox.click().change();
                  $switch.toggleClass('off');
                }
              }
            });
          });
        }

        var $tabs = $('#module-filter-tabs');

        function getParentTopOffset($obj, offset) {
          var $parent = $obj.offsetParent();
          if ($obj[0] != $parent[0]) {
            offset += $parent.position().top;
            return getParentTopOffset($parent, offset);
          }
          return offset;
        }

        var tabsTopOffset = null;
        function getParentsTopOffset() {
          if (tabsTopOffset === null) {
            tabsTopOffset = getParentTopOffset($tabs.parent(), 0);
          }
          return tabsTopOffset;
        }

        function viewportTop() {
          var top = $(window).scrollTop();
          return top;
        }

        function viewportBottom() {
          var top = $(window).scrollTop();
          var bottom = top + $(window).height();

          bottom -= $('#page-actions').height();

          return bottom;
        }

        function fixToTop(top) {
          if ($tabs.hasClass('bottom-fixed')) {
            $tabs.css({
              'position': 'absolute',
              'top': $tabs.position().top - getParentsTopOffset(),
              'bottom': 'auto'
            });
            $tabs.removeClass('bottom-fixed');
          }

          if (($tabs.css('position') == 'absolute' && $tabs.offset().top - top >= 0) || ($tabs.css('position') != 'absolute' && $tabs.offset().top - top <= 0)) {
            $tabs.addClass('top-fixed');
            $tabs.attr('style', '');
          }
        }

        function fixToBottom(bottom) {
          if ($tabs.hasClass('top-fixed')) {
            $tabs.css({
              'position': 'absolute',
              'top': $tabs.position().top - getParentsTopOffset(),
              'bottom': 'auto'
            });
            $tabs.removeClass('top-fixed');
          }

          if ($tabs.offset().top + $tabs.height() - bottom <= 0) {
            $tabs.addClass('bottom-fixed');
            var style = '';
            var pageActionsHeight = $('#page-actions').height();
            if (pageActionsHeight > 0) {
              style = 'bottom: ' + pageActionsHeight + 'px';
            }
            else if (Drupal.settings.moduleFilter.dynamicPosition) {
              // style = 'bottom: ' + $('#module-filter-submit', $tabs).height() + 'px';
            }
            $tabs.attr('style', style);
          }
        }

        var lastTop = 0;
        $(window).scroll(function() {
          var top = viewportTop();
          var bottom = viewportBottom();

          if ($modules.offset().top >= top) {
            $tabs.removeClass('top-fixed').attr('style', '');
          }
          else {
            if (top > lastTop) { // Downward scroll.
              if ($tabs.height() > bottom - top) {
                fixToBottom(bottom);
              }
              else {
                fixToTop(top);
              }
            }
            else { // Upward scroll.
              fixToTop(top);
            }
          }
          lastTop = top;
        });

        moduleFilter.adjustHeight();
      });
    }
  }
};

Drupal.ModuleFilter.Tab = function(element, id) {
  var self = this;

  this.id = id;
  this.hash = id.substring(0, id.length - 4);
  this.element = element;

  $('a', this.element).click(function() {
    if (!Drupal.settings.moduleFilter.useURLFragment) {
      var hash = (!self.element.hasClass('selected')) ? self.hash : 'all';
      Drupal.ModuleFilter.selectTab(hash);
      return false;
    }

    if (self.element.hasClass('selected')) {
      // Clear the active tab.
      window.location.hash = 'all';
      return false;
    }
  });

  $('tr.' + this.id, $('#system-modules')).hover(
    function() {
      self.element.addClass('suggest');
    },
    function() {
      self.element.removeClass('suggest');
    }
  );
};

Drupal.ModuleFilter.selectTab = function(hash) {
  if (!hash || Drupal.ModuleFilter.tabs[hash + '-tab'] == undefined || Drupal.settings.moduleFilter.enabledCounts[hash].total == 0) {
    if (Drupal.settings.moduleFilter.rememberActiveTab) {
      var activeTab = Drupal.ModuleFilter.getState('activeTab');
      if (activeTab && Drupal.ModuleFilter.tabs[activeTab + '-tab'] != undefined) {
        hash = activeTab;
      }
    }

    if (!hash) {
      hash = 'all';
    }
  }

  if (Drupal.ModuleFilter.activeTab != undefined) {
    Drupal.ModuleFilter.activeTab.element.removeClass('selected');
  }

  Drupal.ModuleFilter.activeTab = Drupal.ModuleFilter.tabs[hash + '-tab'];
  Drupal.ModuleFilter.activeTab.element.addClass('selected');

  var moduleFilter = $('input[name="module_filter[name]"]').data('moduleFilter');
  var filter = moduleFilter.applyFilter();

  if (!Drupal.ModuleFilter.modulesTop) {
    Drupal.ModuleFilter.modulesTop = $('#module-filter-modules').offset().top;
  }
  else {
    // Calculate header offset; this is important in case the site is using
    // admin_menu module which has fixed positioning and is on top of everything
    // else.
    var headerOffset = Drupal.settings.tableHeaderOffset ? eval(Drupal.settings.tableHeaderOffset + '()') : 0;
    // Scroll back to top of #module-filter-modules.
    $('html, body').animate({
      scrollTop: Drupal.ModuleFilter.modulesTop - headerOffset
    }, 500);
    // $('html, body').scrollTop(Drupal.ModuleFilter.modulesTop);
  }

  Drupal.ModuleFilter.setState('activeTab', hash);
};

Drupal.ModuleFilter.eventHandlerOperateByURLFragment = function(event) {
  var hash = $.param.fragment();
  Drupal.ModuleFilter.selectTab(hash);
};

Drupal.ModuleFilter.countSummary = function(id) {
  return Drupal.t('@enabled of @total', { '@enabled': Drupal.settings.moduleFilter.enabledCounts[id].enabled, '@total': Drupal.settings.moduleFilter.enabledCounts[id].total });
};

Drupal.ModuleFilter.Tab.prototype.updateEnabling = function(name, remove) {
  this.enabling = this.enabling || {};
  if (!remove) {
    this.enabling[name] = name;
  }
  else {
    delete this.enabling[name];
  }
};

Drupal.ModuleFilter.Tab.prototype.updateDisabling = function(name, remove) {
  this.disabling = this.disabling || {};
  if (!remove) {
    this.disabling[name] = name;
  }
  else {
    delete this.disabling[name];
  }
};

Drupal.ModuleFilter.Tab.prototype.updateVisualAid = function() {
  var visualAid = '';
  var enabling = new Array();
  var disabling = new Array();

  if (this.enabling != undefined) {
    for (var i in this.enabling) {
      enabling.push(this.enabling[i]);
    }
    if (enabling.length > 0) {
      enabling.sort();
      visualAid += '<span class="enabling">+' + enabling.join('</span>, <span class="enabling">') + '</span>';
    }
  }
  if (this.disabling != undefined) {
    for (var i in this.disabling) {
      disabling.push(this.disabling[i]);
    }
    if (disabling.length > 0) {
      disabling.sort();
      if (enabling.length > 0) {
        visualAid += '<br />';
      }
      visualAid += '<span class="disabling">-' + disabling.join('</span>, <span class="disabling">') + '</span>';
    }
  }

  if (this.visualAid == undefined) {
    $('a span.summary', this.element).append('<span class="visual-aid"></span>');
    this.visualAid = $('span.visual-aid', this.element);
  }

  this.visualAid.empty().append(visualAid);
};

Drupal.ModuleFilter.getTabID = function($row) {
  var id = $row.data('moduleFilterTabID');
  if (!id) {
    // Find the tab ID.
    var classes = $row.attr('class').split(' ');
    for (var i in classes) {
      if (Drupal.ModuleFilter.tabs[classes[i]] != undefined) {
        id = classes[i];
        break;
      }
    }
    $row.data('moduleFilterTabID', id);
  }
  return id;
};

Drupal.ModuleFilter.updateVisualAid = function(type, $row) {
  var id = Drupal.ModuleFilter.getTabID($row);

  if (!id) {
    return false;
  }

  var tab = Drupal.ModuleFilter.tabs[id];
  var name = Drupal.checkPlain($('td:nth(1) strong', $row).text());
  switch (type) {
    case 'enable':
      if (Drupal.ModuleFilter.disabling[id + name] != undefined) {
        delete Drupal.ModuleFilter.disabling[id + name];
        tab.updateDisabling(name, true);
        $row.removeClass('disabling');
      }
      else {
        Drupal.ModuleFilter.enabling[id + name] = name;
        tab.updateEnabling(name);
        $row.addClass('enabling');
      }
      break;
    case 'disable':
      if (Drupal.ModuleFilter.enabling[id + name] != undefined) {
        delete Drupal.ModuleFilter.enabling[id + name];
        tab.updateEnabling(name, true);
        $row.removeClass('enabling');
      }
      else {
        Drupal.ModuleFilter.disabling[id + name] = name;
        tab.updateDisabling(name);
        $row.addClass('disabling');
      }
      break;
  }

  tab.updateVisualAid();
};

Drupal.ModuleFilter.Filter.prototype.adjustHeight = function() {
  // Hack for adjusting the height of the modules section.
  var minHeight = $('#module-filter-tabs ul').height() + 10;
  minHeight += $('#module-filter-tabs #module-filter-submit').height();
  $('#module-filter-modules').css('min-height', minHeight);
  this.element.trigger('moduleFilter:adjustHeight');
}

})(jQuery);