AJAX.registerTeardown('database/events.js', function () {
  $(document).off('click', 'a.ajax.add_anchor, a.ajax.edit_anchor');
  $(document).off('click', 'a.ajax.export_anchor');
  $(document).off('click', '#bulkActionExportButton');
  $(document).off('click', 'a.ajax.drop_anchor');
  $(document).off('click', '#bulkActionDropButton');
  $(document).off('change', 'select[name=item_type]');
});
const DatabaseEvents = {
  /**
   * @var $ajaxDialog Query object containing the reference to the
   *                  dialog that contains the editor
   */
  $ajaxDialog: null,
  /**
   * @var syntaxHiglighter Reference to the codemirror editor
   */
  syntaxHiglighter: null,
  /**
   * Validate editor form fields.
   *
   * @return {bool}
   */
  validate: function () {
    /**
     * @var $elm a jQuery object containing the reference
     *           to an element that is being validated
     */
    var $elm = null;
    // Common validation. At the very least the name
    // and the definition must be provided for an item
    $elm = $('table.rte_table').last().find('input[name=item_name]');
    if ($elm.val() === '') {
      $elm.trigger('focus');
      alert(Messages.strFormEmpty);
      return false;
    }
    $elm = $('table.rte_table').find('textarea[name=item_definition]');
    if ($elm.val() === '') {
      if (this.syntaxHiglighter !== null) {
        this.syntaxHiglighter.focus();
      } else {
        $('textarea[name=item_definition]').last().trigger('focus');
      }
      alert(Messages.strFormEmpty);
      return false;
    }
    // The validation has so far passed, so now
    // we can validate item-specific fields.
    return this.validateCustom();
  },
  exportDialog: function ($this) {
    var $msg = Functions.ajaxShowMessage();
    if ($this.attr('id') === 'bulkActionExportButton') {
      var combined = {
        success: true,
        title: Messages.strExport,
        message: '',
        error: ''
      };
      // export anchors of all selected rows
      var exportAnchors = $('input.checkall:checked').parents('tr').find('.export_anchor');
      var count = exportAnchors.length;
      var returnCount = 0;
      var p = $.when();
      exportAnchors.each(function () {
        var h = $(this).attr('href');
        p = p.then(function () {
          return $.get(h, {
            'ajax_request': true
          }, function (data) {
            returnCount++;
            if (data.success === true) {
              combined.message += '\n' + data.message + '\n';
              if (returnCount === count) {
                showExport(combined);
              }
            } else {
              // complain even if one export is failing
              combined.success = false;
              combined.error += '\n' + data.error + '\n';
              if (returnCount === count) {
                showExport(combined);
              }
            }
          });
        });
      });
    } else {
      $.get($this.attr('href'), {
        'ajax_request': true
      }, showExport);
    }
    Functions.ajaxRemoveMessage($msg);
    function showExport(data) {
      if (data.success === true) {
        Functions.ajaxRemoveMessage($msg);
        /**
         * @var buttonOptions Object containing options
         *                     for jQueryUI dialog buttons
         */
        var buttonOptions = {
          [Messages.strClose]: {
            text: Messages.strClose,
            class: 'btn btn-primary',
            click: function () {
              $(this).dialog('close').remove();
            }
          }
        };
        /**
         * Display the dialog to the user
         */
        data.message = '<textarea cols="40" rows="15" class="w-100">' + data.message + '</textarea>';
        var $ajaxDialog = $('<div>' + data.message + '</div>').dialog({
          classes: {
            'ui-dialog-titlebar-close': 'btn-close'
          },
          width: 500,
          buttons: buttonOptions,
          title: data.title
        });
        // Attach syntax highlighted editor to export dialog
        /**
         * @var $elm jQuery object containing the reference
         *           to the Export textarea.
         */
        var $elm = $ajaxDialog.find('textarea');
        Functions.getSqlEditor($elm);
      } else {
        Functions.ajaxShowMessage(data.error, false);
      }
    } // end showExport()
  },

  // end exportDialog()
  editorDialog: function (isNew, $this) {
    var that = this;
    /**
     * @var $edit_row jQuery object containing the reference to
     *                the row of the the item being edited
     *                from the list of items
     */
    var $editRow = null;
    if ($this.hasClass('edit_anchor')) {
      // Remember the row of the item being edited for later,
      // so that if the edit is successful, we can replace the
      // row with info about the modified item.
      $editRow = $this.parents('tr');
    }
    /**
     * @var $msg jQuery object containing the reference to
     *           the AJAX message shown to the user
     */
    var $msg = Functions.ajaxShowMessage();
    $.get($this.attr('href'), {
      'ajax_request': true
    }, function (data) {
      if (data.success === true) {
        // We have successfully fetched the editor form
        Functions.ajaxRemoveMessage($msg);
        /**
         * @var buttonOptions Object containing options
         *                     for jQueryUI dialog buttons
         */
        var buttonOptions = {
          [Messages.strGo]: {
            text: Messages.strGo,
            class: 'btn btn-primary'
          },
          [Messages.strClose]: {
            text: Messages.strClose,
            class: 'btn btn-secondary'
          }
        };
        // Now define the function that is called when
        // the user presses the "Go" button
        buttonOptions[Messages.strGo].click = function () {
          // Move the data from the codemirror editor back to the
          // textarea, where it can be used in the form submission.
          if (typeof CodeMirror !== 'undefined') {
            that.syntaxHiglighter.save();
          }
          // Validate editor and submit request, if passed.
          if (that.validate()) {
            /**
             * @var data Form data to be sent in the AJAX request
             */
            var data = $('form.rte_form').last().serialize();
            $msg = Functions.ajaxShowMessage(Messages.strProcessingRequest);
            var url = $('form.rte_form').last().attr('action');
            $.post(url, data, function (data) {
              if (data.success === true) {
                // Item created successfully
                Functions.ajaxRemoveMessage($msg);
                Functions.slidingMessage(data.message);
                that.$ajaxDialog.dialog('close');
                // If we are in 'edit' mode, we must
                // remove the reference to the old row.
                if (mode === 'edit' && $editRow !== null) {
                  $editRow.remove();
                }
                // Sometimes, like when moving a trigger from
                // a table to another one, the new row should
                // not be inserted into the list. In this case
                // "data.insert" will be set to false.
                if (data.insert) {
                  // Insert the new row at the correct
                  // location in the list of items
                  /**
                   * @var text Contains the name of an item from
                   *           the list that is used in comparisons
                   *           to find the correct location where
                   *           to insert a new row.
                   */
                  var text = '';
                  /**
                   * @var inserted Whether a new item has been
                   *               inserted in the list or not
                   */
                  var inserted = false;
                  $('table.data').find('tr').each(function () {
                    text = $(this).children('td').eq(0).find('strong').text().toUpperCase().trim();
                    if (text !== '' && text > data.name) {
                      $(this).before(data.new_row);
                      inserted = true;
                      return false;
                    }
                  });
                  if (!inserted) {
                    // If we didn't manage to insert the row yet,
                    // it must belong at the end of the list,
                    // so we insert it there.
                    $('table.data').append(data.new_row);
                  }
                  // Fade-in the new row
                  $('tr.ajaxInsert').show('slow').removeClass('ajaxInsert');
                } else if ($('table.data').find('tr').has('td').length === 0) {
                  // If we are not supposed to insert the new row,
                  // we will now check if the table is empty and
                  // needs to be hidden. This will be the case if
                  // we were editing the only item in the list,
                  // which we removed and will not be inserting
                  // something else in its place.
                  $('table.data').hide('slow', function () {
                    $('#nothing2display').show('slow');
                  });
                }
                // Now we have inserted the row at the correct
                // position, but surely at least some row classes
                // are wrong now. So we will iterate through
                // all rows and assign correct classes to them
                /**
                 * @var ct Count of processed rows
                 */
                var ct = 0;
                /**
                 * @var rowclass Class to be attached to the row
                 *               that is being processed
                 */
                var rowclass = '';
                $('table.data').find('tr').has('td').each(function () {
                  rowclass = ct % 2 === 0 ? 'odd' : 'even';
                  $(this).removeClass().addClass(rowclass);
                  ct++;
                });
                // If this is the first item being added, remove
                // the "No items" message and show the list.
                if ($('table.data').find('tr').has('td').length > 0 && $('#nothing2display').is(':visible')) {
                  $('#nothing2display').hide('slow', function () {
                    $('table.data').show('slow');
                  });
                }
                Navigation.reload();
              } else {
                Functions.ajaxShowMessage(data.error, false);
              }
            }); // end $.post()
          } // end "if (that.validate())"
        }; // end of function that handles the submission of the Editor
        buttonOptions[Messages.strClose].click = function () {
          $(this).dialog('close');
        };
        /**
         * Display the dialog to the user
         */
        that.$ajaxDialog = $('<div id="rteDialog">' + data.message + '</div>').dialog({
          classes: {
            'ui-dialog-titlebar-close': 'btn-close'
          },
          width: 700,
          minWidth: 500,
          buttons: buttonOptions,
          // Issue #15810 - use button titles for modals (eg: new procedure)
          // Respect the order: title on href tag, href content, title sent in response
          title: $this.attr('title') || $this.text() || $(data.title).text(),
          modal: true,
          open: function () {
            $('#rteDialog').dialog('option', 'max-height', $(window).height());
            if ($('#rteDialog').parents('.ui-dialog').height() > $(window).height()) {
              $('#rteDialog').dialog('option', 'height', $(window).height());
            }
            $(this).find('input[name=item_name]').trigger('focus');
            $(this).find('input.datefield').each(function () {
              Functions.addDatepicker($(this).css('width', '95%'), 'date');
            });
            $(this).find('input.datetimefield').each(function () {
              Functions.addDatepicker($(this).css('width', '95%'), 'datetime');
            });
            $.datepicker.initialized = false;
          },
          close: function () {
            $(this).remove();
          }
        });
        /**
         * @var mode Used to remember whether the editor is in
         *           "Edit" or "Add" mode
         */
        var mode = 'add';
        if ($('input[name=editor_process_edit]').length > 0) {
          mode = 'edit';
        }
        // Attach syntax highlighted editor to the definition
        /**
         * @var elm jQuery object containing the reference to
         *                 the Definition textarea.
         */
        var $elm = $('textarea[name=item_definition]').last();
        var linterOptions = {};
        linterOptions.eventEditor = true;
        that.syntaxHiglighter = Functions.getSqlEditor($elm, {}, 'both', linterOptions);
      } else {
        Functions.ajaxShowMessage(data.error, false);
      }
    }); // end $.get()
  },

  dropDialog: function ($this) {
    /**
     * @var $curr_row Object containing reference to the current row
     */
    var $currRow = $this.parents('tr');
    /**
     * @var question String containing the question to be asked for confirmation
     */
    var question = $('<div></div>').text($currRow.children('td').children('.drop_sql').html());
    // We ask for confirmation first here, before submitting the ajax request
    $this.confirm(question, $this.attr('href'), function (url) {
      /**
       * @var msg jQuery object containing the reference to
       *          the AJAX message shown to the user
       */
      var $msg = Functions.ajaxShowMessage(Messages.strProcessingRequest);
      var params = Functions.getJsConfirmCommonParam(this, $this.getPostData());
      $.post(url, params, function (data) {
        if (data.success === true) {
          /**
           * @var $table Object containing reference
           *             to the main list of elements
           */
          var $table = $currRow.parent();
          // Check how many rows will be left after we remove
          // the one that the user has requested us to remove
          if ($table.find('tr').length === 3) {
            // If there are two rows left, it means that they are
            // the header of the table and the rows that we are
            // about to remove, so after the removal there will be
            // nothing to show in the table, so we hide it.
            $table.hide('slow', function () {
              $(this).find('tr.even, tr.odd').remove();
              $('.withSelected').remove();
              $('#nothing2display').show('slow');
            });
          } else {
            $currRow.hide('slow', function () {
              $(this).remove();
              // Now we have removed the row from the list, but maybe
              // some row classes are wrong now. So we will iterate
              // through all rows and assign correct classes to them.
              /**
               * @var ct Count of processed rows
               */
              var ct = 0;
              /**
               * @var rowclass Class to be attached to the row
               *               that is being processed
               */
              var rowclass = '';
              $table.find('tr').has('td').each(function () {
                rowclass = ct % 2 === 1 ? 'odd' : 'even';
                $(this).removeClass().addClass(rowclass);
                ct++;
              });
            });
          }
          // Get rid of the "Loading" message
          Functions.ajaxRemoveMessage($msg);
          // Show the query that we just executed
          Functions.slidingMessage(data.sql_query);
          Navigation.reload();
        } else {
          Functions.ajaxShowMessage(data.error, false);
        }
      }); // end $.post()
    });
  },

  dropMultipleDialog: function ($this) {
    // We ask for confirmation here
    $this.confirm(Messages.strDropRTEitems, '', function () {
      /**
       * @var msg jQuery object containing the reference to
       *          the AJAX message shown to the user
       */
      var $msg = Functions.ajaxShowMessage(Messages.strProcessingRequest);

      // drop anchors of all selected rows
      var dropAnchors = $('input.checkall:checked').parents('tr').find('.drop_anchor');
      var success = true;
      var count = dropAnchors.length;
      var returnCount = 0;
      dropAnchors.each(function () {
        var $anchor = $(this);
        /**
         * @var $curr_row Object containing reference to the current row
         */
        var $currRow = $anchor.parents('tr');
        var params = Functions.getJsConfirmCommonParam(this, $anchor.getPostData());
        $.post($anchor.attr('href'), params, function (data) {
          returnCount++;
          if (data.success === true) {
            /**
             * @var $table Object containing reference
             *             to the main list of elements
             */
            var $table = $currRow.parent();
            // Check how many rows will be left after we remove
            // the one that the user has requested us to remove
            if ($table.find('tr').length === 3) {
              // If there are two rows left, it means that they are
              // the header of the table and the rows that we are
              // about to remove, so after the removal there will be
              // nothing to show in the table, so we hide it.
              $table.hide('slow', function () {
                $(this).find('tr.even, tr.odd').remove();
                $('.withSelected').remove();
                $('#nothing2display').show('slow');
              });
            } else {
              $currRow.hide('fast', function () {
                // we will iterate
                // through all rows and assign correct classes to them.
                /**
                 * @var ct Count of processed rows
                 */
                var ct = 0;
                /**
                 * @var rowclass Class to be attached to the row
                 *               that is being processed
                 */
                var rowclass = '';
                $table.find('tr').has('td').each(function () {
                  rowclass = ct % 2 === 1 ? 'odd' : 'even';
                  $(this).removeClass().addClass(rowclass);
                  ct++;
                });
              });
              $currRow.remove();
            }
            if (returnCount === count) {
              if (success) {
                // Get rid of the "Loading" message
                Functions.ajaxRemoveMessage($msg);
                $('#rteListForm_checkall').prop({
                  checked: false,
                  indeterminate: false
                });
              }
              Navigation.reload();
            }
          } else {
            Functions.ajaxShowMessage(data.error, false);
            success = false;
            if (returnCount === count) {
              Navigation.reload();
            }
          }
        }); // end $.post()
      }); // end drop_anchors.each()
    });
  },

  /**
   * Validate custom editor form fields.
   *
   * @return {bool}
   */
  validateCustom: function () {
    /**
     * @var elm a jQuery object containing the reference
     *          to an element that is being validated
     */
    var $elm = null;
    if (this.$ajaxDialog.find('select[name=item_type]').find(':selected').val() === 'RECURRING') {
      // The interval field must not be empty for recurring events
      $elm = this.$ajaxDialog.find('input[name=item_interval_value]');
      if ($elm.val() === '') {
        $elm.trigger('focus');
        alert(Messages.strFormEmpty);
        return false;
      }
    } else {
      // The execute_at field must not be empty for "once off" events
      $elm = this.$ajaxDialog.find('input[name=item_execute_at]');
      if ($elm.val() === '') {
        $elm.trigger('focus');
        alert(Messages.strFormEmpty);
        return false;
      }
    }
    return true;
  }
};
AJAX.registerOnload('database/events.js', function () {
  /**
   * Attach Ajax event handlers for the Add/Edit functionality.
   */
  $(document).on('click', 'a.ajax.add_anchor, a.ajax.edit_anchor', function (event) {
    event.preventDefault();
    if ($(this).hasClass('add_anchor')) {
      $.datepicker.initialized = false;
    }
    DatabaseEvents.editorDialog($(this).hasClass('add_anchor'), $(this));
  });

  /**
   * Attach Ajax event handlers for Export
   */
  $(document).on('click', 'a.ajax.export_anchor', function (event) {
    event.preventDefault();
    DatabaseEvents.exportDialog($(this));
  }); // end $(document).on()

  $(document).on('click', '#bulkActionExportButton', function (event) {
    event.preventDefault();
    DatabaseEvents.exportDialog($(this));
  }); // end $(document).on()

  /**
   * Attach Ajax event handlers for Drop functionality
   */
  $(document).on('click', 'a.ajax.drop_anchor', function (event) {
    event.preventDefault();
    DatabaseEvents.dropDialog($(this));
  }); // end $(document).on()

  $(document).on('click', '#bulkActionDropButton', function (event) {
    event.preventDefault();
    DatabaseEvents.dropMultipleDialog($(this));
  }); // end $(document).on()

  /**
   * Attach Ajax event handlers for the "Change event type" functionality, so that the correct
   * rows are shown in the editor when changing the event type
   */
  $(document).on('change', 'select[name=item_type]', function () {
    $(this).closest('table').find('tr.recurring_event_row, tr.onetime_event_row').toggle();
  });
});