/* --------------------------------------------------------------
 init.js 2016-10-11
 Gambio GmbH
 http://www.gambio.de
 Copyright (c) 2016 Gambio GmbH
 Released under the GNU General Public License (Version 2)
 [http://www.gnu.org/licenses/gpl-2.0.html]
 --------------------------------------------------------------
 */

/**
 * Invoices Table Controller
 *
 * This controller initializes the main invoices table with a new jQuery DataTables instance.
 */
gx.controllers.module(
    'init',

    [
        `${jse.source}/vendor/datatables/jquery.dataTables.min.css`,
        `${jse.source}/vendor/datatables/jquery.dataTables.min.js`,
        `${jse.source}/vendor/momentjs/moment.min.js`,
        `${gx.source}/libs/invoices_overview_columns`,
        `${gx.source}/libs/search`,
        'datatable',
        'modal',
        'user_configuration_service'
    ],

    function (data) {

        'use strict';

        // ------------------------------------------------------------------------
        // VARIABLES
        // ------------------------------------------------------------------------

        /**
         * Module Selector
         *
         * @type {jQuery}
         */
        const $this = $(this);

        /**
         * Module Instance
         *
         * @type {Object}
         */
        const module = {};

        // ------------------------------------------------------------------------
        // FUNCTIONS
        // ------------------------------------------------------------------------

        /**
         * Get Initial Table Order
         *
         * @param {Object} parameters Contains the URL parameters.
         * @param {Object} columns Contains the column definitions.
         *
         * @return {Array[]}
         */
        function _getOrder(parameters, columns) {
            let index = 1; // Order by first column by default.
            let direction = 'desc'; // Order DESC by default.

            // Apply initial table sort.
            if (parameters.sort) {
                direction = parameters.sort.charAt(0) === '-' ? 'desc' : 'asc';
                const columnName = parameters.sort.slice(1);

                for (let column of columns) {
                    if (column.name === columnName) {
                        index = columns.indexOf(column);
                        break;
                    }
                }
            } else if (data.activeColumns.indexOf('invoiceDate') > -1) { // Order by date if possible.
                index = data.activeColumns.indexOf('invoiceDate');
            }

            return [[index, direction]];
        }

        /**
         * Get Initial Search Cols
         *
         * @param {Object} parameters Contains the URL parameters.
         *
         * @returns {Object[]} Returns the initial filtering values.
         */
        function _getSearchCols(parameters, columns) {
            if (!parameters.filter) {
                return [];
            }

            const searchCols = [];

            for (let column of columns) {
                let entry = null;
                let value = parameters.filter[column.name];

                if (value) {
                    entry = {search: decodeURIComponent(value)};
                }

                searchCols.push(entry);
            }

            return searchCols;
        }

        // ------------------------------------------------------------------------
        // INITIALIZATION
        // ------------------------------------------------------------------------

        module.init = function (done) {
            const columns = jse.libs.datatable.prepareColumns($this, jse.libs.invoices_overview_columns,
                data.activeColumns);
            const parameters = $.deparam(window.location.search.slice(1));
            const pageLength = parseInt(parameters.length || data.pageLength);

            jse.libs.datatable.create($this, {
                autoWidth: false,
                dom: 't',
                pageLength,
                displayStart: parseInt(parameters.page) ? (parseInt(parameters.page) - 1) * pageLength : 0,
                serverSide: true,
                language: jse.libs.datatable.getTranslations(jse.core.config.get('languageCode')),
                ajax: {
                    url: jse.core.config.get('appUrl') + '/admin/admin.php?do=InvoicesOverviewAjax/DataTable',
                    type: 'POST',
                    data: {
                        pageToken: jse.core.config.get('pageToken')
                    }
                },
                orderCellsTop: true,
                order: _getOrder(parameters, columns),
                searchCols: _getSearchCols(parameters, columns),
                columns
            });

            // Add table error handler.
            jse.libs.datatable.error($this, function (event, settings, techNote, message) {
                const title = 'DataTables ' + jse.core.lang.translate('error', 'messages');
                jse.libs.modal.showMessage(title, message);
            });

            // Add pagination change handler.
            $this.on('datatable_custom_pagination:length_change', function (event, newPageLength) {
                jse.libs.user_configuration_service.set({
                    data: {
                        userId: jse.core.registry.get('userId'),
                        configurationKey: 'invoicesOverviewPageLength',
                        configurationValue: newPageLength
                    }
                });
            });

            // Add draw event handler.
            $this.on('draw.dt', () => {
                $this.find('thead input:checkbox')
                    .prop('checked', false)
                    .trigger('change', [false]); // No need to update the tbody checkboxes (event.js).
                $this.find('tbody').attr('data-gx-widget', 'single_checkbox');
                gx.widgets.init($this); // Initialize the checkbox widget.
            });

            // Set admin search value.
            if (Object.keys(parameters).includes('filter') && Object.keys(parameters.filter).includes('invoiceNumber')) {
                jse.libs.search.setValue(parameters.filter.invoiceNumber, true);
            }

            done();
        };

        return module;
    });