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,
    /**
     * @var buttonOptions Object containing options for
     *                    the jQueryUI dialog buttons
     */
    buttonOptions: {},
    /**
     * 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 button_options Object containing options
                 *                     for jQueryUI dialog buttons
                 */
                var buttonOptions = {};
                buttonOptions[Messages.strClose] = 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({
                    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);
                // Now define the function that is called when
                // the user presses the "Go" button
                that.buttonOptions[Messages.strGo] = 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
                that.buttonOptions[Messages.strClose] = function () {
                    $(this).dialog('close');
                };
                /**
                 * Display the dialog to the user
                 */
                that.$ajaxDialog = $('<div id="rteDialog">' + data.message + '</div>').dialog({
                    width: 700,
                    minWidth: 500,
                    buttons: that.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();
    });
});
