import BusinessObjects from "../lib/business_objects/business_objects.js";
import Events from "../lib/events.js";
import LocalStorage from "../lib/local_storage.js";
import Validation from "../lib/validation.js";
import BasePage from "./base.js";
import API from "../api.js";
import DOM from "../dom.js";
import Utils from "../lib/utils.js";

import OverlayConfirm from "../components/common/temporary/overlay_confirm.js";
import OverlayError from "../components/common/temporary/overlay_error.js";

export default class TableBasePage extends BasePage {
    // static hash
    // static attrIdRowObject
    // callSaveTableContent

    constructor(router) {
        super(router);
        this.cursorYInitial = null;
        this.rowInitial = null;
        this.placeholder = null;
        this.dragSrcEl = null;
        this.dragSrcRow = null;

        this.hookupTableCellDdls = this.hookupTableCellDdls.bind(this);
    }
    
    initialize(isPopState = false) {
        throw new Error("Must implement initialize() method.");
    }
    sharedInitialize(isPopState = false, isSinglePageApp = false) {
        if (!isPopState) {
            super.sharedInitialize();
            this.hookupFilters();
            this.hookupButtonsSaveCancel();
            this.hookupTableMain();
            OverlayConfirm.hookup(() => {
                if (isSinglePageApp) {
                    this.saveRecordsTableDirtySinglePageApp();
                }
                else {
                    this.saveRecordsTableDirty();
                }
            });
        } else {
            let dataPage = this.getLocalStoragePage();
            let filters = dataPage[flagFormFilters];
            let formFilters = this.getFormFilters();
            let filtersDefault = DOM.convertForm2JSON(formFilters);
            if (!Validation.areEqualDicts(filters, filtersDefault)) {
                this.callFilterTableContent();
            }
        }
    }
    hookupFilters() {
        if (this.constructor === TableBasePage) {
            throw new Error("Subclass of TableBasePage must implement method hookupFilters().");
        }
    }
    sharedHookupFilters() {
        this.hookupButtonApplyFilters();
    }
    hookupFilterActive() {
        this.hookupFilter(flagActive);
    }
    hookupFilter(filterFlag, handler = (event, filter) => { return TableBasePage.isDirtyFilter(filter); }) {
        let filterSelector = idFormFilters + ' .' + filterFlag;
        this.hookupEventHandler("change", filterSelector, handler);
    }
    static isDirtyFilter(filter) {
        let isDirty = DOM.updateAndCheckIsElementDirty(filter);
        if (isDirty) {
            let tbody = document.querySelector(idTableMain + ' tbody');
            tbody.querySelectorAll('tr').remove();
            tbody.appendChild(document.createElement('<div>Press "Apply Filters" to refresh the table.</div>'));
        }
        return isDirty;
    }
    hookupFilterIsNotEmpty() {
        this.hookupFilter(flagIsNotEmpty);
    }
    hookupButtonApplyFilters() {
        this.hookupEventHandler("click", idButtonApplyFilters, (event, button) => {
            event.stopPropagation();
            this.callFilterTableContent();
        });
    }
    /*
    getAndLoadFilteredTableContent = () => {
        this.callFilterTableContent()
            .catch(error => console.error('Error:', error));
    }
    */
    getFormFilters() {
        return document.querySelector(idFormFilters);
    }
    callFilterTableContent() {
        let formFilters = this.getFormFilters();
        let filtersJson = DOM.convertForm2JSON(formFilters);
        this.leave();
        API.goToHash(this.constructor.hash, filtersJson);
    }
    callbackLoadTableContent(response) {
        let table = TableBasePage.getTableMain();
        let bodyTable = table.querySelector('tbody');
        bodyTable.querySelectorAll('tr').forEach(function(row) { row.remove(); });
        let rowsJson = response.data[flagRows];
        if (!Validation.isEmpty(rowsJson) && rowsJson.every(row => row.hasOwnProperty('display_order'))) {
            rowsJson = rowsJson.sort((a, b) => a.display_order - b.display_order);
        }
        rowsJson.forEach(this.loadRowTable.bind(this));
        this.hookupTableMain();
    }
    static getTableMain() {
        return document.querySelector(idTableMain);
    }
    loadRowTable(rowJson) {
        throw new Error("Subclass of TableBasePage must implement method loadRowTable().");
    }
    getAndLoadFilteredTableContentSinglePageApp() {
        this.callFilterTableContent()
            .then(data => {
                Utils.consoleLogIfNotProductionEnvironment('Table data received:', data);
                this.callbackLoadTableContent(data);
            })
            .catch(error => console.error('Error:', error));
    }
    hookupButtonsSaveCancel() {
        this.hookupButtonSave();
        this.hookupButtonCancel();
        this.toggleShowButtonsSaveCancel(false);
    }
    saveRecordsTableDirty() {
        let records = this.getTableRecords(true);
        if (records.length == 0) {
            OverlayError.show('No records to save');
            return;
        }
        let formElement = this.getFormFilters();
        let comment = DOM.getElementValueCurrent(document.querySelector(idTextareaConfirm));
        this.callSaveTableContent(records, formElement, comment)
            .then(data => {
                if (data[flagStatus] == flagSuccess) {
                    if (_verbose) { 
                        Utils.consoleLogIfNotProductionEnvironment('Records saved!');
                        Utils.consoleLogIfNotProductionEnvironment('Data received:', data);
                    }
                    this.callFilterTableContent();
                }
                else {
                    Utils.consoleLogIfNotProductionEnvironment("error: ", data[flagMessage]);
                    OverlayError.show(data[flagMessage]);
                }
            })
            .catch(error => console.error('Error:', error));
    }
    getTableRecords(dirtyOnly = false) {
        let records = [];
        let record;
        document.querySelectorAll(idTableMain + ' > tbody > tr').forEach((row) => {
            if (dirtyOnly && !DOM.hasDirtyChildrenContainer(row)) return;
            record = this.getJsonRow(row);
            records.push(record);
        });
        return records;
    }
    getJsonRow(row) {
        throw new Error("Subclass of TableBasePage must implement method getJsonRow().");
    }
    saveRecordsTableDirtySinglePageApp() {
        let records = this.getTableRecords(true);
        if (records.length == 0) {
            OverlayError.show('No records to save');
            return;
        }
        let formElement = this.getFormFilters();
        let comment = DOM.getElementValueCurrent(document.querySelector(idTextareaConfirm));
        this.callSaveTableContent(records, formElement, comment)
            .then(data => {
                if (data[flagStatus] == flagSuccess) {
                    if (_verbose) { 
                        Utils.consoleLogIfNotProductionEnvironment('Records saved!');
                        Utils.consoleLogIfNotProductionEnvironment('Data received:', data);
                    }
                    this.callbackLoadTableContent(data);
                }
                else {
                    Utils.consoleLogIfNotProductionEnvironment("error: ", data[flagMessage]);
                    OverlayError.show(data[flagMessage]);
                }
            })
            .catch(error => console.error('Error:', error));
    }
    hookupButtonCancel() {
        Events.initialiseEventHandler(idFormFilters + ' button.' + flagCancel, flagInitialised, (button) => {
            button.addEventListener("click", (event) => {
                event.stopPropagation();
                this.callFilterTableContent();
            });
            button.classList.add(flagCollapsed);
        });
    }
    handleClickAddRowTable(event, button) {
        event.stopPropagation();
        _rowBlank.setAttribute(this.constructor.attrIdRowObject, -1 - _rowBlank.getAttribute(this.constructor.attrIdRowObject));
        let tbody = document.querySelector(idTableMain + ' tbody');
        let row = _rowBlank.cloneNode(true);
        row.classList.remove(flagInitialised);
        row.querySelectorAll('.' + flagInitialised).forEach(function(element) {
            element.classList.remove(flagInitialised);
        });
        let countRows = document.querySelectorAll(idTableMain + ' > tbody > tr').length;
        row.setAttribute(this.constructor.attrIdRowObject, -1 - countRows);
        this.initialiseRowNew(tbody, row);
        tbody.appendChild(row);
        this.hookupTableMain();
    }
    initialiseRowNew(tbody, row) {
        if (this.constructor === TableBasePage) {
            throw new Error("Subclass of TableBasePage must implement method initialiseRowNew().");
        }
        row.classList.remove(flagRowNew);
    }
    hookupTableMain() {
        if (this.constructor === TableBasePage) {
            throw new Error("Must implement hookupTableMain() method.");
        }
        if (true) { // _rowBlank == null) {
            Events.initialiseEventHandler(idTableMain, flagInitialised, (table) => {
               this.cacheRowBlank();
            });
        }
    }
    cacheRowBlank() {
        let selectorRowNew = idTableMain + ' tbody tr.' + flagRowNew;
        let rowBlankTemp = document.querySelector(selectorRowNew);
        Utils.consoleLogIfNotProductionEnvironment("row blank temp: ", rowBlankTemp);
        let countRows = document.querySelectorAll(idTableMain + ' > tbody > tr').length;
        _rowBlank = rowBlankTemp.cloneNode(true);
        document.querySelectorAll(selectorRowNew).forEach(function(row) {
            row.remove();
        });
        _rowBlank.setAttribute(this.constructor.attrIdRowObject, -1 - countRows);
    }
    initialiseSliderDisplayOrderRowNew(tbody, row) {
        // let tdSelector = ':scope > tr > td.' + flagDisplayOrder;
        // let tbody = document.querySelector('table' + (Validation.isEmpty(flagTable) ? '' : '.' + flagTable) + ' > tbody');
        let slidersDisplayOrder = tbody.querySelectorAll(':scope > tr > td.' + flagDisplayOrder + ' input.' + flagSlider);
        let maxDisplayOrder = 0;
        slidersDisplayOrder.forEach((slider) => {
            maxDisplayOrder = Math.max(maxDisplayOrder, parseFloat(DOM.getElementValueCurrent(slider)));
        });
        let sliderDisplayOrder = row.querySelector('td.' + flagDisplayOrder + ' .' + flagSlider);
        DOM.setElementValuesCurrentAndPrevious(sliderDisplayOrder, maxDisplayOrder + 1);
    }
    hookupSlidersDisplayOrderTable() {
        let selectorDisplayOrder = idTableMain + ' tbody tr td.' + flagDisplayOrder + ' input.' + flagSlider + '.' + flagDisplayOrder;
        this.hookupChangeHandlerTableCells(selectorDisplayOrder);
    }
    hookupChangeHandlerTableCells(inputSelector, handler = (event, element) => { this.handleChangeNestedElementCellTable(event, element); }) {
        Events.initialiseEventHandler(inputSelector, flagInitialised, (input) => {
            input.addEventListener("change", (event) => {
                handler(event, input);
            });
            handler(null, input);
        });
    }
    /*
    handleChangeElementCellTable(event, element) {
        let row = DOM.getRowFromElement(element);
        let td = DOM.getCellFromElement(element);
        let wasDirtyRow = DOM.hasDirtyChildrenContainer(row);
        let wasDirtyElement = element.classList.contains(flagDirty);
        let isDirtyElement = DOM.updateAndCheckIsElementDirty(element);
        if (isDirtyElement != wasDirtyElement) {
            DOM.handleDirtyElement(td, isDirtyElement);
            let isNowDirtyRow = DOM.hasDirtyChildrenContainer(row);
            if (isNowDirtyRow != wasDirtyRow) {
                DOM.handleDirtyElement(row, isNowDirtyRow);
                let rows = this.getTableRecords(true);
                let existsDirtyRecord = rows.length > 0;
                this.toggleShowButtonsSaveCancel(existsDirtyRecord);
            }
        }
    }
    handleChangeElementNestedCellTable(event, element, flagColumnList = [], orderNesting = 1) {
        let orderNestingTemp = orderNesting;
        let row, td, nestedRowSelector;
        while (orderNestingTemp > 0) {
            nestedRowSelector = idTableMain;
            for (let indexOrderNesting = 0; indexOrderNesting < orderNestingTemp; indexOrderNesting++) {
                nestedRowSelector += ' tbody tr';
            }
            row = DOM.getClosestParent(element, nestedRowSelector);
            td = row.querySelector('td.' + flag);
        }
        let row = DOM.getRowFromElement(element);
        let td = DOM.getCellFromElement(element);
        let wasDirtyRow = DOM.hasDirtyChildrenContainer(row);
        let wasDirtyElement = element.classList.contains(flagDirty);
        let isDirtyElement = DOM.updateAndCheckIsElementDirty(element);
        if (isDirtyElement != wasDirtyElement) {
            DOM.handleDirtyElement(td, isDirtyElement);
            let isNowDirtyRow = DOM.hasDirtyChildrenContainer(row);
            if (isNowDirtyRow != wasDirtyRow) {
                DOM.handleDirtyElement(row, isNowDirtyRow);
                let rows = this.getTableRecords(true);
                let existsDirtyRecord = rows.length > 0;
                this.toggleShowButtonsSaveCancel(existsDirtyRecord);
            }
        }
    }
    handleChangeElementSubtableCell(event, element, flagFieldSubtable) {
        let rowSubtable = element.closest(idTableMain + ' td.' + flagFieldSubtable + ' tbody tr');
        let rowTable = rowSubtable.closest(idTableMain + ' > tbody > tr');
        let td = DOM.getCellFromElement(element);
        // let tdSubtable = td.closest('td.' + flagFieldSubtable);
        let wasDirtyRowSubtable = DOM.hasDirtyChildrenContainer(rowSubtable);
        let wasDirtyRowTable = DOM.hasDirtyChildrenContainer(rowTable);
        let wasDirtyElement = element.classList.contains(flagDirty);
        let isDirtyElement = DOM.updateAndCheckIsElementDirty(element);
        Utils.consoleLogIfNotProductionEnvironment({isDirtyElement, wasDirtyElement});
        if (isDirtyElement != wasDirtyElement) {
            DOM.handleDirtyElement(td, isDirtyElement);
            let isNowDirtyRowSubtable = DOM.hasDirtyChildrenContainer(rowSubtable);
            Utils.consoleLogIfNotProductionEnvironment({isNowDirtyRowSubtable, wasDirtyRowSubtable});
            if (isNowDirtyRowSubtable != wasDirtyRowSubtable) {
                DOM.handleDirtyElement(rowSubtable, isNowDirtyRowSubtable);
                let isNowDirtyRowTable = DOM.hasDirtyChildrenContainer(rowTable);
                Utils.consoleLogIfNotProductionEnvironment({isNowDirtyRowTable, wasDirtyRowTable});
                if (isNowDirtyRowTable != wasDirtyRowTable) {
                    DOM.handleDirtyElement(rowTable, isNowDirtyRowTable);
                    let rows = this.getTableRecords(true);
                    let existsDirtyRecord = rows.length > 0;
                    this.toggleShowButtonsSaveCancel(existsDirtyRecord);
                }
            }
        }
    }
    */
    handleChangeNestedElementCellTable(event, element) {
        let wasDirtyParentRows = this.getAllIsDirtyRowsInParentTree(element);
        let wasDirtyElement = element.classList.contains(flagDirty);
        let isDirtyElement = DOM.updateAndCheckIsElementDirty(element);
        Utils.consoleLogIfNotProductionEnvironment({isDirtyElement, wasDirtyElement, wasDirtyParentRows});
        let td = DOM.getCellFromElement(element);
        DOM.setElementAttributeValueCurrent(td, DOM.getElementAttributeValueCurrent(element));
        if (isDirtyElement != wasDirtyElement) {
            DOM.handleDirtyElement(td, isDirtyElement);
            this.updateAndToggleShowButtonsSaveCancel();
            this.cascadeChangedIsDirtyNestedElementCellTable(element, isDirtyElement, wasDirtyParentRows);
        }
    }
    getAllIsDirtyRowsInParentTree(element) {
        let rows = [];
        let parent = element;
        let isDirty;
        while (parent) {
            if (parent.matches('tr')) {
                isDirty = parent.classList.contains(flagDirty)
                rows.push(isDirty);
            }
            parent = parent.parentElement;
        }
        return rows;
    }
    cascadeChangedIsDirtyNestedElementCellTable(element, isDirtyElement, wasDirtyParentRows) {
        if (Validation.isEmpty(wasDirtyParentRows)) return;
        let td = DOM.getCellFromElement(element);
        let isDirtyTd = isDirtyElement || DOM.hasDirtyChildrenContainer(tr);
        DOM.handleDirtyElement(td, isDirtyTd);
        let tr = DOM.getRowFromElement(td);
        let isDirtyRow = isDirtyTd || DOM.hasDirtyChildrenContainer(tr);
        let wasDirtyRow = wasDirtyParentRows.shift();
        Utils.consoleLogIfNotProductionEnvironment({isDirtyRow, wasDirtyRow});
        if (isDirtyRow != wasDirtyRow) {
            DOM.handleDirtyElement(tr, isDirtyRow);
            this.updateAndToggleShowButtonsSaveCancel();
            this.cascadeChangedIsDirtyNestedElementCellTable(tr.parentElement, isDirtyRow, wasDirtyParentRows);
        }
    }
    hookupChangeHandlerTableCellsWhenNotCollapsed(inputSelector, handler = (event, element) => {
        if (!element.classList.contains(flagCollapsed)) this.handleChangeNestedElementCellTable(event, element);
    }) {
        this.hookupEventHandler("change", inputSelector, handler);
    }
    hookupTextareasCodeTable() {
        this.hookupChangeHandlerTableCells(idTableMain + ' tbody tr td.' + flagCode + ' textarea');
    }
    hookupTextareasNameTable() {
        this.hookupChangeHandlerTableCells(idTableMain + ' tbody tr td.' + flagName + ' textarea');
    }
    hookupTextareasDescriptionTable() {
        this.hookupChangeHandlerTableCells(idTableMain + ' tbody tr td.' + flagDescription + ' textarea');
    }
    hookupFieldsActive(flagTable = '', handleClickRowNew = (event, element) => { this.handleClickAddRowTable(event, element); }) {
        let selectorButton = 'table' + (Validation.isEmpty(flagTable) ? '' : '.' + flagTable) + ' > tbody > tr > td.' + flagActive + ' button';
        let selectorButtonDelete = selectorButton + '.' + flagDelete;
        let selectorButtonUndelete = selectorButton + ':not(.' + flagDelete + ')';
        Utils.consoleLogIfNotProductionEnvironment("hookupFieldsActive: ", selectorButtonDelete, selectorButtonUndelete);
        this.hookupButtonsRowDelete(selectorButtonDelete, selectorButtonUndelete);
        this.hookupButtonsRowUndelete(selectorButtonDelete, selectorButtonUndelete);
        this.hookupEventHandler(
            "click"
            , 'table' + (Validation.isEmpty(flagTable) ? '' : '.' + flagTable) + ' > thead > tr > th.' + flagActive + ' button'
            , (event, button) => { handleClickRowNew(event, button); }
        );
    }
    hookupButtonsRowDelete(selectorButtonDelete, selectorButtonUndelete, changeHandler = (event, element) => { this.handleChangeNestedElementCellTable(event, element); }) {
        this.hookupEventHandler("click", selectorButtonDelete, (event, element) => {
            this.handleClickButtonRowDelete(event, element, selectorButtonDelete, selectorButtonUndelete, (changeEvent, changeElement) => { changeHandler(changeEvent, changeElement); });
        });
    }
    handleClickButtonRowDelete(event, element, selectorButtonDelete, selectorButtonUndelete, changeHandler = (event, element) => { this.handleChangeNestedElementCellTable(event, element); }) {
        let row = DOM.getRowFromElement(element);
        if (row.classList.contains(flagRowNew) && !DOM.hasDirtyChildrenContainer(row)) {
            row.parentNode.removeChild(row);
        }
        let buttonAdd = element.cloneNode(false);
        buttonAdd.classList.remove(flagInitialised);
        buttonAdd.classList.remove(flagDelete);
        buttonAdd.classList.add(flagAdd);
        buttonAdd.textContent = '+';
        element.replaceWith(buttonAdd);
        changeHandler(null, buttonAdd);
        this.hookupButtonsRowUndelete(selectorButtonDelete, selectorButtonUndelete, (changeEvent, changeElement) => { changeHandler(changeEvent, changeElement); });
        this.updateAndToggleShowButtonsSaveCancel();
    }
    hookupButtonsRowUndelete(selectorButtonDelete, selectorButtonUndelete, changeHandler = (event, element) => { this.handleChangeNestedElementCellTable(event, element); }) {
        this.hookupEventHandler("click", selectorButtonUndelete, (event, element) => {
            this.handleClickButtonRowUndelete(event, element, selectorButtonDelete, selectorButtonUndelete, (changeEvent, changeElement) => { changeHandler(changeEvent, changeElement); });
        });
    }
    handleClickButtonRowUndelete(event, element, selectorButtonDelete, selectorButtonUndelete, changeHandler = (event, element) => { this.handleChangeNestedElementCellTable(event, element); }) {
        let buttonDelete = element.cloneNode(false);
        buttonDelete.classList.remove(flagInitialised);
        buttonDelete.classList.remove(flagAdd);
        buttonDelete.classList.add(flagDelete);
        buttonDelete.textContent = 'x';
        element.replaceWith(buttonDelete);
        changeHandler(null, buttonDelete);
        this.hookupButtonsRowDelete(selectorButtonDelete, selectorButtonUndelete, (changeEvent, changeElement) => { changeHandler(changeEvent, changeElement); });
        this.updateAndToggleShowButtonsSaveCancel();
    }
    hookupTdsAccessLevel() {
        let cellSelector = idTableMain + ' tbody td.' + flagAccessLevel;
        this.hookupTableCellDdlPreviews(cellSelector, Utils.getListFromDict(accessLevels));
    }
    hookupTableCellDdlPreviews(
        cellSelector
        , optionList
        , ddlHookup = (cellSelector) => { this.hookupTableCellDdls(cellSelector); }
        , changeHandler = (event, element) => { this.handleChangeNestedElementCellTable(event, element); }
    ) {
        this.hookupEventHandler("click", cellSelector, (event, td) => {
            this.handleClickTableCellDdlPreview(
                event
                , td
                , optionList
                , cellSelector
                , (cellSelector) => { ddlHookup(
                    cellSelector
                    , (event, element) => { changeHandler(event, element); }
                ); }
            );
        });
        ddlHookup(cellSelector + ' select');
    }
    hookupTableCellDdls(ddlSelector, changeHandler = (event, element) => { this.handleChangeNestedElementCellTable(event, element); }) {
        this.hookupEventHandler("change", ddlSelector, (event, element) => { changeHandler(event, element); });
    }
    handleClickTableCellDdlPreview(event, td, optionObjectList, cellSelector, ddlHookup = (cellSelector) => { this.hookupTableCellDdls(cellSelector); }) {
        if (td.querySelector('select')) return;
        let tdNew = td.cloneNode(true);
        td.parentNode.replaceChild(tdNew, td);
        let idSelected = DOM.getElementAttributeValueCurrent(tdNew);
        tdNew.innerHTML = '';
        let ddl = document.createElement('select');
        DOM.setElementValuesCurrentAndPrevious(ddl, idSelected);
        let optionJson, option;
        if (_verbose) { 
            Utils.consoleLogIfNotProductionEnvironment("click table cell ddl preview");
            Utils.consoleLogIfNotProductionEnvironment({optionObjectList, cellSelector});
        }
        option = DOM.createOption(null);
        ddl.appendChild(option);
        optionObjectList.forEach((optionObjectJson) => {
            optionJson = BusinessObjects.getOptionJsonFromObjectJson(optionObjectJson, idSelected);
            option = DOM.createOption(optionJson);
            ddl.appendChild(option);
        });
        tdNew.appendChild(ddl);
        let ddlSelector = cellSelector + ' select';
        ddlHookup(ddlSelector);
    }
    hookupTableCellDDlPreviewsWhenNotCollapsed(cellSelector, optionList, ddlHookup = (event, element) => { this.hookupTableCellDdls(event, element); }) {
        this.hookupEventHandler("click", cellSelector, (event, td) => {
            let div = td.querySelector('div');
            if (!div || div.classList.contains(flagCollapsed)) return;
            this.handleClickTableCellDdlPreview(event, td, optionList, cellSelector, (event, element) => { ddlHookup(event, element); });
        });
    }
    toggleColumnCollapsed(flagColumn, isCollapsed) {
        this.toggleColumnHasClassnameFlag(flagColumn, isCollapsed, flagCollapsed);
    }
    toggleColumnHeaderCollapsed(flagColumn, isCollapsed) {
        this.toggleColumnHasClassnameFlag(flagColumn, isCollapsed, flagCollapsed);
    }
    
    createTdActive(isActive) {
        let tdActive = document.createElement("td");
        tdActive.classList.add(flagActive);
        let buttonActive = document.createElement("button");
        buttonActive.classList.add(flagActive);
        buttonActive.classList.add(isActive ? flagDelete : flagAdd);
        buttonActive.textContent = isActive ? 'x' : '+';
        DOM.setElementAttributesValuesCurrentAndPrevious(buttonActive, isActive);
        tdActive.appendChild(buttonActive);
        return tdActive;
    }
    
    leave() {
        if (this.constructor === TableBasePage) {
            throw new Error("Must implement leave() method.");
        }
        super.leave();
        let formFilters = this.getFormFilters();
        let dataPage = {};
        dataPage[flagFormFilters] = DOM.convertForm2JSON(formFilters);
        this.setLocalStoragePage(dataPage);
    }

    toggleColumnHasClassnameFlag(columnFlag, isRequiredFlag, classnameFlag) {
        let table = TableBasePage.getTableMain();
        let columnTh = table.querySelector('th.' + columnFlag);
        let columnThHasFlag = columnTh.classList.contains(classnameFlag);
        if (isRequiredFlag == columnThHasFlag) return;
        DOM.toggleElementHasClassnameFlag(columnTh, isRequiredFlag, classnameFlag);
    }
    toggleColumnHeaderHasClassnameFlag(columnFlag, isRequiredFlag, classnameFlag) {
        let table = TableBasePage.getTableMain();
        let columnTh = table.querySelector('th.' + columnFlag);
        DOM.toggleElementHasClassnameFlag(columnTh, isRequiredFlag, classnameFlag);
    }

    updateAndToggleShowButtonsSaveCancel() {
        let records = this.getTableRecords(true);
        let existsDirtyRecord = records.length > 0;
        this.toggleShowButtonsSaveCancel(existsDirtyRecord);
    }
}