/* eslint-disable no-param-reassign */
import form from 'form';
import dropdown from 'dropdown';
import { transliterator } from 'utils';
import LocalizationService from 'services/LocalizationService';
import { validationSeverityTypes, validationSeverityClasses } from 'Meta';
import template from '../templates/grid.hbs';
import CollectionView from './CollectionView';
import RowView from './RowView';
import GridHeaderView from './header/GridHeaderView';
import LoadingChildView from './LoadingRowView';
import ToolbarView from '../../components/toolbar/ToolbarView';
import ActionMenuView from '../../components/toolbar/views/ActionMenuView';
import MobileService from '../../services/MobileService';
import LoadingBehavior from '../../views/behaviors/LoadingBehavior';
import SearchBarView from '../../views/SearchBarView';
import EmptyGridView from './EmptyGridView';
import LayoutBehavior from '../../layout/behaviors/LayoutBehavior';
import { getDefaultActions, classes, configurationConstants, contextTypes } from '../meta';
import factory from '../factory';
import ErrorButtonView from '../../views/ErrorButtonView';
import InfoButtonView from '../../views/InfoButtonView';
import TooltipPanelView from '../../views/TooltipPanelView';
import ErrorsPanelView from '../../views/ErrorsPanelView';
import GlobalEventService from '../../services/GlobalEventService';
import { GraphModel } from '../../components/treeEditor/types';
import Backbone from 'backbone';
import { GridItemBehavior } from '../behaviors/GridItemBehavior';

/*
    Public interface:

    This view produce:
        trigger: positionChanged (sender, { oldPosition, position })
        trigger: viewportHeightChanged (sender, { oldViewportHeight, viewportHeight })
    This view react on:
        collection change (via Backbone.Collection events)
        position change (when we scroll with scrollbar for example): updatePosition(newPosition)
 */

const defaultOptions = options => ({
    focusSearchOnAttach: !MobileService.isMobile,
    searchBarOptions: { isAutoHideable: true },
    columns: [],
    emptyView: EmptyGridView,
    emptyViewOptions: {
        text: () => (options.columns?.length ? Localizer.get('CORE.GRID.EMPTYVIEW.EMPTY') : Localizer.get('CORE.GRID.NOCOLUMNSVIEW.ALLCOLUMNSHIDDEN')),
        colspan: options.columns ? options.columns.length + !!options.showCheckbox : 0
    },
    draggable: false,
    isSliding: true,
    showHeader: true,
    handleSearch: true,
    updateToolbarEvents: '',
    showTreeEditor: false,
    showContextMenu: true,
    treeEditorIsHidden: false,
    treeEditorConfig: new Map(),
    headerHeight: 30
});

/**
 * @name GridView
 * @memberof module:core.list.views
 * @class GridView
 * @constructor
 * @description View-контейнер для заголовка и контента
 * @extends Marionette.View
 * @param {Object} options Constructor options
 * @param {Array} options.collection массив элементов списка
 * @param {Array} options.columns массив колонок
 * @param {Backbone.View} options.emptyView View для отображения пустого списка (нет строк) или не инициализированы колонки.
 * @param {Number} options.childHeight высота строки списка (childView)
 * @param {Backbone.View} [options.childView] view строки списка
 * @param {Backbone.View} [options.childViewOptions] опции для childView
 * @param {Function} options.childViewSelector ?
 * @param {Object} [options.emptyViewOptions] опции для emptyView
 * @param {String} options.height задает как определяется высота строки, значения: fixed, auto
 * @param {Backbone.View} [options.loadingChildView] view-лоадер, показывается при подгрузке строк
 * @param {Number} options.maxRows максимальное количество отображаемых строк (используется с опцией height: auto)
 * @param {Boolean} options.useDefaultRowView использовать RowView по умолчанию.
 * @param {Array} options.excludeActions Array of strings. Example: <code>[ 'archive', 'delete' ]</code>.
 * @param {Array} options.additionalActions Array of objects <code>[ id,  name,* type=button'|'checkbox', isChecked, iconClass, severity]</code>.
 * @param {Boolean} options.showCheckbox show or hide checkbox
 * В случае, если true — обязательно должны быть указаны cellView для каждой колонки
 * */

export default Marionette.View.extend({
    initialize(options) {
        this.__onScroll = this.__onScroll.bind(this);

        _.defaults(this.options, defaultOptions(options));
        const comparator = factory.getDefaultComparator(this.options.columns);
        this.columnsCollection = this.options.columnsCollection || new Backbone.Collection(this.options.columns.map(column => ({ id: column.id, ...column })));
        this.columnCollectionDefault = this.columnsCollection.clone();
        this.collection = factory.createWrappedCollection({ ...this.options, comparator });
        if (this.collection === undefined) {
            throw new Error('You must provide a collection to display.');
        }
        if (typeof this.options.transliteratedFields === 'object') {
            transliterator.setOptionsToFieldsOfNewSchema(this.options.columns, this.options.transliteratedFields);
        }

        this.options.onColumnSort && (this.onColumnSort = this.options.onColumnSort); //jshint ignore:line

        this.uniqueId = _.uniqueId('native-grid');

        const HeaderView = this.options.headerView || GridHeaderView;

        if (this.options.showHeader !== false) {
            this.options.showHeader = true;
        }

        if (this.options.showHeader) {
            this.headerView = new HeaderView(
                _.defaultsPure(
                    {
                        columns: this.options.columns,
                        columnsCollection: this.columnsCollection,
                        gridEventAggregator: this,
                        checkBoxPadding: options.checkBoxPadding || 0,
                        uniqueId: this.uniqueId,
                        isTree: this.options.isTree,
                        expandOnShow: options.expandOnShow,
                        showCheckbox: this.options.showCheckbox
                    },
                    this.options
                )
            );

            this.listenTo(this.headerView, 'onColumnSort', this.onColumnSort, this);
            this.listenTo(this.headerView, 'update:width', (config: { index: number, newColumnWidth: number }) => this.__handleColumnWidthChange(config));
            this.listenTo(this.headerView, 'change:isEveryColumnSetPxWidth', () => this.__toggleTableWidth());
            this.listenTo(this.headerView, 'scroll:left', this.__scrollLeft);
        }

        this.isEditable = typeof this.options.editable === 'boolean' ? this.options.editable : this.options.columns.some(column => column.editable);
        if (this.isEditable) {
            this.editableCellsIndexes = [];
            this.options.columns.forEach((column, index) => {
                if (column.editable) {
                    this.editableCellsIndexes.push(index);
                }
            });
            this.listenTo(this.collection, 'move:left', () => this.__onCursorMove(-1));
            this.listenTo(this.collection, 'move:right select:hidden', () => this.__onCursorMove(+1));
            this.listenTo(this.collection, 'select:all select:some select:one', this.__onCollectionSelect);
            this.listenTo(this.collection, 'keydown:default', this.__onKeydown);
            this.listenTo(this.collection, 'keydown:escape', e => this.__triggerSelectedModel('selected:exit', e));
            this.listenTo(this.collection, 'change', this.__validateModel);
        }

        if (this.options.showContextMenu) {
            this.listenTo(this.collection, 'contextmenu', this.__onContextMenu);
        }

        this.__initializeToolbar();

        if (this.options.showSearch) {
            this.searchView = new SearchBarView(this.options.searchBarOptions);
            this.listenTo(this.searchView, 'search', this.__onSearch);
        }
        if (this.options.showTreeEditor) {
            this.__initTreeEditor();
        }
    },

    __initializeToolbar() {
        if (!this.options.showToolbar) {
            return;
        }

        this.toolbarView = new ToolbarView({
            toolbarItems: this.__getToolbarActions() || [],
            skipActionHandlers: true
        });

        const allToolbarActions = this.toolbarView.getToolbarItems();
        const debounceUpdateAction = _.debounce(() => this.__updateActions(allToolbarActions), 10);
        this.__updateActions(allToolbarActions);

        if (this.options.showCheckbox) {
            this.listenTo(this.collection, 'check:all check:some check:none', debounceUpdateAction);
        } else {
            this.listenTo(this.collection, 'select:all select:some select:none deselect:one select:one', debounceUpdateAction);
        }
        if (this.options.updateToolbarEvents) {
            this.listenTo(this.collection.parentCollection, this.options.updateToolbarEvents, debounceUpdateAction);
        }

        this.listenTo(this.toolbarView, 'command:execute', (model, ...rest) => this.__executeAction(model, this.collection, ...rest));
    },

    __handleColumnWidthChange(config: { index: number, newColumnWidth: number }) {
        const { index, newColumnWidth } = config;
        const columnModel = this.options.columns[index].columnModel;
        if (columnModel) {
            columnModel.set('width', newColumnWidth);
            const configWidthColumn = new Map();
            configWidthColumn.set(this.options.columns[index].columnModel.id, { width: newColumnWidth });
            this.setConfigDiff(configWidthColumn);
            this.trigger('treeEditor:save', this.getConfigDiff());
        }
    },

    updatePosition(position, shouldScrollElement = false) {
        const newPosition = this.__checkFillingViewport(position);
        if (
            newPosition === this.listView.state.position
            || !this.collection.isSliding
            || Math.abs(newPosition - this.listView.state.position) < configurationConstants.VISIBLE_COLLECTION_RESERVE_HALF - 1
        ) {
            return;
        }

        this.collection.updatePosition(Math.max(0, newPosition - configurationConstants.VISIBLE_COLLECTION_RESERVE_HALF));
        this.__updateTop();
        this.listView.state.position = newPosition;
        if (shouldScrollElement) {
            this.internalScroll = true;
            const wraper = this.ui.tableTopMostWrapper.get(0);
            let scrollTop;
            if (position === this.collection.length - 1) {
                scrollTop = wraper.scrollHeight - wraper.clientHeight;
            } else {
                scrollTop = newPosition * this.listView.childHeight;
            }
            wraper.scrollTop = scrollTop;

            _.delay(() => (this.internalScroll = false), 100);
        }
        this.__updateTop();

        return newPosition;
    },

    __updateTop() {
        const top = Math.max(0, this.collection.indexOf(this.collection.visibleModels[0]) * this.listView.childHeight + (this.options.showHeader ? 0 : 1)); // first item border
        if (top !== this.oldTop) {
            this.oldTop = top;
            this.ui.content[0].style.top = `${top}px`;
        }
    },

    __checkFillingViewport(position) {
        const maxPosFirstRow = Math.max(0, this.collection.length - this.listView.state.viewportHeight);

        return Math.max(0, Math.min(maxPosFirstRow, position));
    },

    __onScroll(event: MouseEvent) {
        const nextScroll = this.ui.tableTopMostWrapper[0].scrollTop;
        if (
            this.listView.state.viewportHeight === undefined
            || this.__prevScroll === nextScroll
            || this.isDestroyed()
            || this.collection.length <= this.listView.state.viewportHeight
            || this.internalScroll
        ) {
            return;
        }
        this.__prevScroll = nextScroll;
        const newPosition = Math.max(0, Math.floor(nextScroll / this.listView.childHeight));
        this.updatePosition(newPosition, false);
    },

    __onCollectionSelect(collection, options) {
        this.stopListening(GlobalEventService, 'window:mousedown:captured', this.__checkBlur);
        this.listenTo(GlobalEventService, 'window:mousedown:captured', this.__checkBlur);
        this.__onCursorMove(0, options);
    },

    __checkBlur(target: Element) {
        if (this.isDestroyed()) {
            return;
        }
        const popupContainer = document.querySelector('.js-global-popup-stack');
        const spContainer = document.querySelector('.sp-container');
        const isElementOutOfElementOrPopup = this.el.contains(target) || popupContainer?.contains(target) || spContainer?.contains(target);
        if (!isElementOutOfElementOrPopup) {
            this.collection.selectNone ? this.collection.selectNone() : this.collection.deselect();
            this.stopListening(GlobalEventService, 'window:mousedown:captured', this.__checkBlur);
        }
    },

    __onCursorMove(delta, options = {}) {
        const rangeVisibleCellIndex = this.editableCellsIndexes.filter((indexColumn: number) => {
            const column = this.options.columns[indexColumn];
            if (column && column.getStateHidden) {
                return !column.getStateHidden();
            }
            return true;
        });
        const maxIndex = rangeVisibleCellIndex.length - 1;
        const currentSelectedIndex = rangeVisibleCellIndex.indexOf(this.pointedCell);
        const newPosition = Math.min(maxIndex, Math.max(0, currentSelectedIndex + delta));

        const currentSelectedValue = rangeVisibleCellIndex[currentSelectedIndex];
        const newSelectedValue = rangeVisibleCellIndex[newPosition];
        const currentModel = this.collection.find(model => model.cid === this.collection.cursorCid);

        if (currentModel) {
            if (newSelectedValue === currentSelectedValue && delta !== 0) {
                const isPositiveDelta = delta >= 1;
                this.pointedCell = isPositiveDelta ? 0 : rangeVisibleCellIndex[rangeVisibleCellIndex.length - 1];
                this.collection.trigger(isPositiveDelta ? 'nextModel' : 'prevModel');
                return;
            }

            this.pointedCell = newSelectedValue;

            !options.isModelClick && currentModel.trigger('select:pointed', this.pointedCell, false);
        }
    },

    __onKeydown(e) {
        this.__triggerSelectedModel('selected:enter', e);
    },

    __triggerSelectedModel(triggerEvent, ...args) {
        const selectedModel = this.collection.find(model => model.cid === this.collection.cursorCid);
        if (selectedModel) {
            selectedModel.trigger(triggerEvent, ...args);
        }
    },

    toggleSearchActivity(enableSearch) {
        this.searchView.toggleInputActivity(enableSearch);
    },

    onColumnSort(column, comparator) {
        this.collection.comparator = comparator;
        this.collection.sort();
    },

    regions: {
        headerRegion: '.js-grid-header-view',
        contentRegion: {
            el: '.js-grid-content-view',
            replaceElement: true
        },
        toolbarRegion: {
            el: '.js-grid-tools-toolbar-region',
            replaceElement: true
        },
        searchRegion: {
            el: '.js-grid-tools-search-region',
            replaceElement: true
        },
        loadingRegion: '.js-grid-loading-region',
        errorTextRegion: '.js-grid-error-text-region',
        helpTextRegion: '.js-grid-help-text-region'
    },

    ui: {
        title: '.js-grid-title',
        tools: '.js-grid-tools',
        header: '.js-grid-header-view',
        content: '.js-grid-content',
        tableWrapper: '.js-grid-table-wrapper',
        table: '.grid-content-wrp',
        tableTopMostWrapper: '.grid-table-wrapper-war'
    },

    events: {
        dragleave: '__handleDragLeave'
    },

    className() {
        return `${this.options.class || ''} grid-container`;
    },

    template: Handlebars.compile(template),

    behaviors: {
        LoadingBehavior: {
            behaviorClass: LoadingBehavior,
            region: 'loadingRegion'
        },
        LayoutBehavior: {
            behaviorClass: LayoutBehavior
        }
    },

    onRender() {
        if (this.options.showHeader) {
            this.showChildView('headerRegion', this.headerView);

            this.__toggleTableWidth();
        } else {
            this.el.classList.add('grid__headless');
        }

        if (this.options.showToolbar) {
            this.showChildView('toolbarRegion', this.toolbarView);
        }
        if (this.options.showSearch) {
            this.showChildView('searchRegion', this.searchView);
        }
        if (!(this.options.showToolbar || this.options.showSearch)) {
            this.ui.tools.hide();
        }

        const title = this.getOption('title');
        if (title) {
            this.ui.title.text(this.getOption('title'));
        } else {
            this.ui.title.parent().addClass('form-label_empty');
        }
        if (this.options.helpText) {
            const viewModel = new Backbone.Model({
                helpText: this.options.helpText,
                errorText: null
            });

            const infoPopout = dropdown.factory.createPopout({
                buttonView: InfoButtonView,
                panelView: TooltipPanelView,
                panelViewOptions: {
                    model: viewModel,
                    textAttribute: 'helpText'
                },
                popoutFlow: 'right',
                customAnchor: true
            });
            this.showChildView('helpTextRegion', infoPopout);
        }
        this.setRequired(this.options.required);
        this.__updateState();
        if (Core.services.MobileService.isIE) {
            this.ui.tableTopMostWrapper[0].addEventListener('scroll', this.__onScroll);
        } else {
            this.ui.tableTopMostWrapper[0].addEventListener('scroll', this.__onScroll, { passive: true });
        }
    },

    onAttach() {
        if (this.options.maxHeight) {
            this.ui.tableTopMostWrapper.get(0).style.maxHeight = `${this.options.maxHeight}px`;
        }
        const childView = this.options.childView || RowView;
        const showRowIndex = this.getOption('showRowIndex');

        const childViewOptions = (this.childViewOptions = Object.assign(this.options.childViewOptions || {}, {
            columns: this.options.columns,
            transliteratedFields: this.options.transliteratedFields,
            gridEventAggregator: this,
            isTree: this.options.isTree,
            showCheckbox: this.options.showCheckbox,
            draggable: this.options.draggable,
            showRowIndex,
            showContextMenu: this.options.showContextMenu
        }));

        this.listView = new CollectionView({
            collection: this.collection,
            gridEventAggregator: this,
            childView,
            childViewSelector: this.options.childViewSelector,
            emptyView: this.options.emptyView,
            emptyViewOptions: this.options.emptyViewOptions,
            childHeight: this.options.childHeight,
            showHeader: this.options.showHeader,
            childViewOptions,
            filter: this.options.filter,
            loadingChildView: this.options.loadingChildView || LoadingChildView,
            maxRows: this.options.maxRows,
            height: this.options.height,
            isTree: this.options.isTree,
            isEditable: this.isEditable,
            draggable: this.options.draggable,
            showCheckbox: this.options.showCheckbox,
            showRowIndex,
            parentEl: this.ui.tableTopMostWrapper[0],
            parent$el: this.ui.tableTopMostWrapper,
            table$el: this.ui.table,
            minimumVisibleRows: this.options.minimumVisibleRows,
            selectOnCursor: this.options.selectOnCursor,
            headerHeight: this.options.showHeader ? this.options.headerHeight : 0
        });
        this.listenTo(this.listView, 'update:position:internal', state => this.updatePosition(state.topIndex, state.shouldScrollElement));
        this.showChildView('contentRegion', this.listView);

        if (this.options.showSearch && this.options.focusSearchOnAttach) {
            this.searchView.focus();
        }

        this.listenTo(this.listView, 'drag:drop', this.__onItemMoved);
        if (this.options.isSliding) {
            this.listenTo(GlobalEventService, 'window:resize', () => this.updateListViewResize({ newMaxHeight: window.innerHeight, shouldUpdateScroll: false }));
        }

        if (this.options.columns.length && this.options.showHeader) {
            this.__toggleNoColumnsMessage(this.options.columns);
        }
    },

    getChildren() {
        return this.listView.children;
    },

    update() {
        this.__updateState();
    },

    updateListViewResize(options) {
        if (options.newMaxHeight) {
            const table = this.ui.tableTopMostWrapper.get(0);
            table.style.maxHeight = `${options.newMaxHeight - table.getBoundingClientRect().top}px`;
        }
        this.listView.handleResize(options.shouldUpdateScroll);
    },

    onBeforeDestroy() {
        this.__configurationPanel && this.__configurationPanel.destroy();

        if (this.isRendered()) {
            if (Core.services.MobileService.isIE) {
                this.ui.tableTopMostWrapper[0].removeEventListener('scroll', this.__onScroll);
            } else {
                this.ui.tableTopMostWrapper[0].removeEventListener('scroll', this.__onScroll, { passive: true });
            }
        }
    },

    sortBy(columnIndex, sorting) {
        const column = this.options.columns[columnIndex];
        if (sorting) {
            this.options.columns.forEach(c => (c.sorting = null));
            column.sorting = sorting;

            switch (sorting) {
                case 'asc':
                    this.collection.comparator = column.sortAsc;
                    break;
                case 'desc':
                    this.collection.comparator = column.sortDesc;
                    break;
                default:
                    break;
            }
        } else {
            sorting = column.sorting;
            this.options.columns.forEach(c => (c.sorting = null));

            switch (sorting) {
                case 'asc':
                    column.sorting = 'desc';
                    this.collection.comparator = column.sortDesc;
                    break;
                case 'desc':
                    column.sorting = 'asc';
                    this.collection.comparator = column.sortAsc;
                    break;
                default:
                    column.sorting = 'asc';
                    this.collection.comparator = column.sortAsc;
                    break;
            }
        }
        this.onColumnSort(column, this.collection.comparator);
        if (this.options.showHeader) {
            this.headerView.updateSorting();
        }
    },

    handleResize() {
        if (this.options.showHeader) {
            this.headerView.handleResize();
        }
    },

    setLoading(state) {
        if (!this.isDestroyed()) {
            this.loading.setLoading(state);
        }
    },

    validate() {
        const errors = [];
        if (this.required && this.collection.length === 0) {
            errors.push({
                type: 'required',
                message: Localizer.get('CORE.FORM.VALIDATION.REQUIREDGRID'),
                severity: 'Error'
            });
        }
        if (this.isEditable) {
            let isErrorInCells = false;
            this.collection.forEach(model => {
                const modelHasErrors = this.__validateModel(model);
                if (modelHasErrors) {
                    isErrorInCells = true;
                }
            });
            if (isErrorInCells) {
                errors.push({
                    type: 'gridError',
                    message: Localizer.get('CORE.FORM.VALIDATION.GRIDERROR'),
                    severity: 'Error'
                });
            }
        }

        if (errors.length) {
            this.setError(errors);
            return errors;
        }
        this.clearError();

        return null;
    },

    setDraggable(draggable: boolean): void {
        this.childViewOptions.draggable = draggable;
        this.trigger('set:draggable', draggable);
        this.listView.setDraggable(draggable);
    },

    __validateModel(model) {
        let hasErrors = false;
        delete model.validationError;
        if (!model.isValid()) {
            hasErrors = true;
        }
        this.options.columns.forEach(column => {
            if (!column.editable || !column.validators) {
                return;
            }
            column.validators.forEach(validatorOptions => {
                const validator = form.repository.getValidator(validatorOptions);
                const fieldError = validator(model.get(column.key), model.attributes);
                if (fieldError) {
                    fieldError;
                    hasErrors = true;
                    if (!model.validationError) {
                        model.validationError = {};
                    }
                    if (!model.validationError[column.key]) {
                        model.validationError[column.key] = [];
                    }
                    model.validationError[column.key].push(fieldError);
                }
            });
        });
        model.trigger('validated');

        return hasErrors;
    },

    replaceColumns(newColumns = []) {
        const columns = this.options.columns;

        newColumns.forEach(newColumn => {
            const index = columns.findIndex(column => column.key === newColumn.key);
            const [oldColumn] = columns.splice(index, 1, newColumn);

            newColumn.columnClass = oldColumn.columnClass;
        });

        this.listView.render();
    },

    __handleDragLeave(event: { originalEvent: DragEvent }) {
        const dragToElement = event.originalEvent.relatedTarget;

        if (this.el.contains(dragToElement) || !document.body.contains(dragToElement)) {
            return;
        }
        this.collection.dragoverModel?.trigger('dragleave');
    },

    // __setCheckBoxColummWidth() {
    //     const lastVisibleModelIndex = this.collection.indexOf(this.collection.visibleModels[this.collection.visibleModels.length - 1]) + 1;
    //     const isMainTheme = Core.services.ThemeService.getTheme() === 'main';
    //     const baseWidth = isMainTheme ? 37 : 42;
    //     const numberWidth = isMainTheme ? 7.3 : 7.44;
    //     this.__setColumnWidth(this.options.columns.length, baseWidth + lastVisibleModelIndex.toString().length * numberWidth, undefined, true);
    // },

    // __setColumnWidth(index: number, width = 0, allColumnsWidth, isCheckBoxCell: boolean) {
    //     const style = this.styleSheet;
    //     const columnClass = ''; //this.columnClasses[index];

    //     const regexp = isCheckBoxCell ? new RegExp(`.${columnClass} { width: \\d+\\.?\\d*px; } `) : new RegExp(`.${columnClass} { flex: [0,1] 0 [+, -]?\\S+\\.?\\S*; } `);
    //     let basis;

    //     if (width > 0) {
    //         if (width < 1) {
    //             basis = `${width * 100}%`;
    //         } else {
    //             basis = `${width}px`;
    //         }
    //     } else {
    //         const column = this.options.columns[index];

    //         if (column.format === 'HTML') {
    //             basis = '0%';
    //         } else {
    //             const defaultWidth = columnWidthByType[column.dataType]; //what is it?

    //             if (defaultWidth) {
    //                 basis = `${defaultWidth}px`;
    //             } else {
    //                 basis = '0%';
    //             }
    //         }
    //     }

    //     const grow = width > 0 ? 0 : 1;
    //     const newValue = isCheckBoxCell ? `.${columnClass} { width: ${width}px; } ` : `.${columnClass} { flex: ${grow} 0 ${basis}; } `;

    //     if (regexp.test(style.innerHTML)) {
    //         style.innerHTML = style.innerHTML.replace(regexp, newValue);
    //     } else {
    //         style.innerHTML += newValue;
    //     }

    //     this.__updateEmptyView(allColumnsWidth);
    // },

    __executeAction(model, collection, ...rest) {
        const selected = this.__getSelectedItems(collection);
        switch (model.get('id')) {
            case 'delete':
                this.__confirmUserAction(
                    Localizer.get('CORE.GRID.ACTIONS.DELETE.CONFIRM.TEXT'),
                    Localizer.get('CORE.GRID.ACTIONS.DELETE.CONFIRM.TITLE'),
                    Localizer.get('CORE.GRID.ACTIONS.DELETE.CONFIRM.YESBUTTONTEXT'),
                    Localizer.get('CORE.GRID.ACTIONS.DELETE.CONFIRM.NOBUTTONTEXT')
                ).then(result => {
                    if (result) {
                        this.__triggerAction(model, selected, ...rest);
                    }
                });
                break;
            case 'archive':
                this.__confirmUserAction(
                    Localizer.get('CORE.GRID.ACTIONS.ARCHIVE.CONFIRM.TEXT'),
                    Localizer.get('CORE.GRID.ACTIONS.ARCHIVE.CONFIRM.TITLE'),
                    Localizer.get('CORE.GRID.ACTIONS.ARCHIVE.CONFIRM.YESBUTTONTEXT'),
                    Localizer.get('CORE.GRID.ACTIONS.ARCHIVE.CONFIRM.NOBUTTONTEXT')
                ).then(result => {
                    if (result) {
                        this.__triggerAction(model, selected, ...rest);
                    }
                });
                break;
            case 'unarchive':
                this.__confirmUserAction(
                    Localizer.get('CORE.GRID.ACTIONS.UNARCHIVE.CONFIRM.TEXT'),
                    Localizer.get('CORE.GRID.ACTIONS.UNARCHIVE.CONFIRM.TITLE'),
                    Localizer.get('CORE.GRID.ACTIONS.UNARCHIVE.CONFIRM.YESBUTTONTEXT'),
                    Localizer.get('CORE.GRID.ACTIONS.UNARCHIVE.CONFIRM.NOBUTTONTEXT')
                ).then(result => {
                    if (result) {
                        this.__triggerAction(model, selected, ...rest);
                    }
                });
                break;
            case 'add':
            default:
                this.__triggerAction(model, selected, ...rest);
                break;
        }
    },

    __confirmUserAction(text: string = '', title: string = '', yesButtonText: string = 'Yes', noButtonText: string = 'No') {
        return Core.services.MessageService.showMessageDialog(text, title, [
            { id: false, isCancel: true, text: noButtonText }, { id: true, text: yesButtonText }
        ]);
    },

    __triggerAction(model, selected, ...rest) {
        const handler = model.get('handler');
        if (typeof handler === 'function') {
            handler(model, selected, ...rest);
            return;
        }
        this.trigger('execute', model, selected, ...rest);
    },

    __onItemMoved(...args) {
        this.trigger('move', ...args);
    },

    setError(errors: Array<any>): void {
        if (!this.__checkUiReady()) {
            return;
        }

        const isWarning = errors.every(error => error.severity?.toLowerCase() === validationSeverityTypes.WARNING);
        if (isWarning) {
            this.el.classList.add(validationSeverityClasses.WARNING);
        } else {
            this.el.classList.add(validationSeverityClasses.ERROR);
        }
        this.errorCollection ? this.errorCollection.reset(errors) : (this.errorCollection = new Backbone.Collection(errors));
        if (!this.isErrorShown) {
            const errorPopout = dropdown.factory.createPopout({
                buttonView: ErrorButtonView,
                panelView: ErrorsPanelView,
                panelViewOptions: {
                    collection: this.errorCollection
                },
                popoutFlow: 'right',
                customAnchor: true
            });
            this.showChildView('errorTextRegion', errorPopout);
            this.isErrorShown = true;
        }
    },

    clearError(): void {
        if (!this.__checkUiReady()) {
            return;
        }
        this.el.classList.remove(validationSeverityClasses.ERROR);
        this.el.classList.remove(validationSeverityClasses.WARNING);
        this.errorCollection && this.errorCollection.reset();
    },

    setRequired(required: boolean) {
        if (!this.__checkUiReady()) {
            return;
        }
        this.required = required;
        this.__updateEmpty();
        if (required) {
            this.listenTo(this.collection, 'add remove reset update', this.__updateEmpty);
        } else {
            this.stopListening(this.collection, 'add remove reset update', this.__updateEmpty);
        }
    },

    __updateEmpty() {
        if (this.required) {
            this.__toggleRequiredClass(this.collection.length === 0);
        } else {
            this.__toggleRequiredClass(false);
        }
    },

    __toggleRequiredClass(required) {
        if (!this.__checkUiReady()) {
            return;
        }
        this.$el.toggleClass(classes.required, Boolean(required));
    },

    __checkUiReady() {
        return this.isRendered() && !this.isDestroyed();
    },

    __onSearch(text) {
        if (this.options.isTree) {
            this.trigger('toggle:collapse:all', !text && !this.options.expandOnShow);
        }
        if (!this.getOption('handleSearch')) {
            this.trigger('search', text);
            return;
        }
        if (text) {
            this.__applyFilter(new RegExp(text, 'i'), this.options.columns, this.collection);
            this.__highlightCollection(text, this.collection);
        } else {
            this.__clearFilter(this.collection);
            this.__unhighlightCollection(this.collection);
        }
    },

    __applyFilter(regexp, columns, collection) {
        collection.filter(model => {
            let result = false;
            const searchableColumns = columns.filter(column => column.searchable !== false).map(column => column.key);
            searchableColumns.forEach(column => {
                const values = model.get(column);
                const testValueFunction = value => {
                    if (value) {
                        const testValue = value.name || value.text || value.toString();
                        return regexp.test(testValue);
                    }
                };
                if (Array.isArray(values) && values.length) {
                    values.forEach(value => {
                        result = result || testValueFunction(value);
                    });
                } else {
                    result = result || testValueFunction(values);
                }
            });

            return result;
        });
    },

    __clearFilter(collection) {
        collection.filter();
    },

    __highlightCollection(text, collection) {
        collection.each(model => {
            model.highlight(text);
        });
    },

    __unhighlightCollection(collection) {
        collection.each(model => {
            model.unhighlight();
        });
    },

    updateToolbar() {
        this.__updateActions(this.toolbarView.getToolbarItems());
    },

    __getToolbarActions() {
        let toolbarActions = [];
        const defaultActions = getDefaultActions();
        if (!this.options.excludeActions) {
            toolbarActions = defaultActions;
        } else if (this.options.excludeActions !== 'all') {
            toolbarActions = defaultActions.filter(action => this.options.excludeActions.indexOf(action.id) === -1);
        }
        if (this.options.additionalActions) {
            toolbarActions = toolbarActions.concat(this.options.additionalActions);
        }
        return toolbarActions;
    },

    __updateActions(allToolbarActions, selected = this.__getSelectedItems(this.collection)) {
        const selectedLength = selected.length;

        const customItems = this.toolbarView.getCustomItems().toJSON();
        const actionsCount = (this.originalToolbar ?? customItems).filter(action => ![contextTypes.any, contextTypes.one].includes(action.contextType)).length;
        if (allToolbarActions.parentCollection && actionsCount > 3) {
            if (selectedLength) {
                allToolbarActions.reset([...this.originalToolbar, ...this.toolbarView.getConstItems().toJSON()]);
            } else {
                if (!this.originalToolbar) {
                    this.originalToolbar = customItems;
                }
                const actions = {
                    type: 'Group',
                    name: LocalizationService.get('CORE.GRID.ACTIONS'),
                    items: customItems
                };
                allToolbarActions.reset([actions, ...this.toolbarView.getConstItems().toJSON()]);
            }
        }

        return allToolbarActions.filter(action => {
            if (action.get('type') === 'Group') {
                const items = action.get('originalItems') || action.get('items');
                const filtered = this.__updateActions(items, selected);
                if (!filtered.length) {
                    return false;
                }
                action.set('originalItems', items);
                action.set('items', filtered);
            }
            let isActionApplicable;
            switch (action.get('contextType')) {
                case 'one':
                    isActionApplicable = selectedLength === 1;
                    break;
                case 'any':
                    isActionApplicable = selectedLength;
                    break;
                case 'void':
                    isActionApplicable = !selectedLength;
                    break;
                default:
                    isActionApplicable = true;
            }
            const condition = action.get('condition');
            if (isActionApplicable && condition && typeof condition === 'function') {
                isActionApplicable = condition(selected);
            }
            return isActionApplicable;
        });
    },

    __getSelectedItems(collection) {
        const selected = (this.options.showCheckbox ? collection.checked : collection.selected) || {};
        if (selected instanceof Backbone.Model) {
            return [selected];
        }
        return Object.values(selected);
    },

    __initTreeEditor() {
        const columnsCollection = this.columnsCollection;

        this.listenTo(columnsCollection, 'columns:move', config => this.__reorderColumns(config));

        this.treeEditor = new Core.components.TreeEditor({
            hidden: this.options.treeEditorIsHidden,
            model: this.options.treeEditorModel,
            configDiff: this.options.treeEditorConfig,
            getNodeName: this.options.getNodeName || (model => model.get('title')),
            nestingOptions: this.options.nestingOptions,
            childsFilter: this.options.childsFilter,
            showPanelViewOnly: this.options.showPanelViewOnly,
            showTreeEditorHeader: this.options.showTreeEditorHeader
        });

        this.__onDiffApplied();

        this.listenTo(columnsCollection, 'add', (model: GraphModel) => {
            const configDiff = {
                oldIndex: this.options.columns.findIndex(col => col.id === model.id),
                newIndex: columnsCollection.indexOf(model)
            };
            this.__moveColumn(configDiff);
        });
        this.listenTo(columnsCollection, 'change:isHidden change:required', model => {
            this.__setColumnVisibility(model.id, !model.get('isHidden') || model.get('required'));
        });
    },

    getTreeEditorView() {
        return this.treeEditor.getView();
    },

    setConfigDiff(configDiff) {
        this.treeEditor.setConfigDiff(configDiff);
    },

    resetConfigDiff() {
        this.treeEditor.resetConfigDiff(['index', 'isHidden']);
    },

    setInitConfig(initConfig) {
        this.treeEditor.setInitConfig(initConfig);
    },

    getConfigDiff() {
        return this.treeEditor.getConfigDiff();
    },

    __setVisibilityAllColumns() {
        this.options.columns.forEach(column => this.__setColumnVisibility(column.id, !column.isHidden));
    },

    __onDiffApplied() {
        const columnsCollection = this.columnsCollection;
        this.options.columns.forEach(column => {
            const model = columnsCollection.get(column.id || column.key);
            Object.entries(model.pick('width', 'isHidden')).forEach(([id, value]) => (column[id] = value));
        });
        this.__setVisibilityAllColumns();
    },

    __reorderColumns(config: string[]) {
        this.options.columns.sort((a, b) => config.indexOf(a.key) - config.indexOf(b.key)); // TODO a, b type: Column
    },

    __moveColumn(options: { oldIndex: number, newIndex: number }) {
        const { oldIndex, newIndex } = options;
        const one = Number(!!this.el.querySelector('.js-cell_selection'));
        const headerElementsCollection = this.el.querySelectorAll('.grid-header-column');

        if (newIndex === oldIndex) {
            return;
        }
        if (newIndex < 0 || newIndex >= headerElementsCollection.length) {
            return;
        }

        const moveElement = el => {
            const parentElement = el.parentElement;
            parentElement.removeChild(el);
            parentElement.insertBefore(el, parentElement.children[newIndex + one]);
        };
        const element = headerElementsCollection[oldIndex];
        if (element) {
            moveElement(element);

            const cells = Array.from(this.el.querySelectorAll(`tbody tr > td:nth-child(${oldIndex + 1 + one})`));
            cells.forEach(row => moveElement(row));

            this.__moveArrayElement(this.options.columns, oldIndex, newIndex);
        }
    },

    __moveArrayElement(array: any[], oldIndex: number, newIndex: number) {
        const start = newIndex < 0 ? array.length + newIndex : newIndex;
        const deleteCount = 0;
        const item = array.splice(oldIndex, 1)[0];
        array.splice(start, deleteCount, item);
    },

    __setColumnVisibility(id: string, visibility = true) {
        if (!this.options.showHeader) {
            return;
        }
        const isHidden = !visibility;
        const columns = this.options.columns;
        const index = columns.findIndex(item => item.id === id);
        const columnToBeHidden = columns[index];
        if (isHidden) {
            columnToBeHidden.isHidden = isHidden;
        } else {
            delete columnToBeHidden.isHidden;
        }

        this.setClassToColumn(id, isHidden, index, classes.hiddenByTreeEditorClass);
    },

    setClassToColumn(id: string, state = false, index: number, classCell: string) {
        if (!this.options.showHeader) {
            return;
        }
        const columns = this.options.columns;
        let elementIndex = index + 1;
        const column = columns[index];

        if (column.customClass && column.customClass.length) {
            const arrayCustomClasses = column.customClass.split(' ');
            const hasCustomClassCell = arrayCustomClasses.find(customClass => customClass === classCell);
            if (!hasCustomClassCell && state) {
                column.customClass = `${column.customClass} ${classCell}`;
            } else if (!state) {
                const indexDeleteClass = arrayCustomClasses.indexOf(classCell);
                if (indexDeleteClass !== -1) {
                    arrayCustomClasses.splice(indexDeleteClass, 1).join(' ');
                    column.customClass = arrayCustomClasses;
                }
            }
        } else if (state) {
            column.customClass = classCell;
        }
        if (!this.isAttached()) {
            return;
        }
        this.__toggleNoColumnsMessage(columns);
        if (this.el.querySelector('.js-cell_selection')) {
            elementIndex += 1;
        }
        const headerSelector = `.js-grid-header-view tr > *:nth-child(${elementIndex})`;
        this.el.querySelector(headerSelector).classList.toggle(classCell, state);

        const cellSelector = `.js-visible-collection tr > *:nth-child(${elementIndex})`;
        Array.from(this.el.querySelectorAll(cellSelector)).forEach(element => {
            element.classList.toggle(classCell, state);
        });
    },

    __toggleNoColumnsMessage(columns: Array<object>) {
        let hiddenColumnsCounter = 0;
        let isHidden;
        columns.forEach(col => {
            isHidden = col.getStateHidden ? col.getStateHidden() : col.isHidden;
            if (isHidden) {
                hiddenColumnsCounter++;
            }
        });
        if (hiddenColumnsCounter === columns.length) {
            if (this.el.querySelectorAll('.tree-editor-no-columns-message').length < 1) {
                const noColumnsMessage = document.createElement('div');
                noColumnsMessage.innerText = Localizer.get('CORE.GRID.NOCOLUMNSVIEW.ALLCOLUMNSHIDDEN');
                noColumnsMessage.classList.add('tree-editor-no-columns-message', 'empty-view', 'empty-view_text');
                this.el.querySelector('.js-grid-content').appendChild(noColumnsMessage);
                this.el.querySelector('tbody').classList.add(classes.hiddenByTreeEditorClass);
                this.el.querySelector('.grid-header').classList.add(classes.hiddenByTreeEditorClass);
                this.ui.tableWrapper.get(0).classList.add(classes.hiddenColumns);
            }
        } else if (this.el.querySelector('.tree-editor-no-columns-message')) {
            this.el.querySelector('.tree-editor-no-columns-message').remove();
            this.el.querySelector('tbody').classList.remove(classes.hiddenByTreeEditorClass);
            this.el.querySelector('.grid-header').classList.remove(classes.hiddenByTreeEditorClass);
            this.ui.tableWrapper.get(0).classList.remove(classes.hiddenColumns);
        }
    },

    __toggleTableWidth() {
        this.ui.table.get(0).classList.toggle(classes.tableWidthAuto, this.headerView.isEveryColumnSetPxWidth);
    },

    __onContextMenu(model: Backbone.Model & GridItemBehavior, event: MouseEvent) {
        if (this.menu) {
            this.menu.destroy();
        }
        if (!model.checked) {
            this.collection.uncheckAll();
        }
        model.check();
        const collection = this.toolbarView.getCustomItems();
        this.menu = new ActionMenuView({
            model: new Backbone.Model({ items: collection }),
            showName: true,
            adjustmentPosition: {
                x: event.pageX,
                y: event.pageY
            }
        });
        this.listenTo(this.menu, 'action:click', (model, ...rest) => this.__executeAction(model, this.collection, ...rest));
        this.menu.open();
        event.preventDefault();
    },

    __scrollLeft(columnRight: number) {
        const containerEl = this.ui.tableTopMostWrapper.get(0);
        containerEl.scrollLeft = columnRight - containerEl.offsetWidth;
    }
});