import * as React from 'react';
import { useRef, useMemo, useCallback } from 'react';
import JqxTreeGrid, { ITreeGridProps, jqx } from 'jqwidgets-scripts/jqwidgets-react-tsx/jqxtreegrid';

const App = () => {
    const myTreeGrid = useRef<JqxTreeGrid>(null);

    const employees = useMemo(() => [
        { "EmployeeID": 1, "FirstName": "Nancy", "LastName": "Davolio", "ReportsTo": 2, "Country": "USA", "Title": "Sales Representative", "HireDate": "1992-05-01 00:00:00", "BirthDate": "1948-12-08 00:00:00", "City": "Seattle", "Address": "507 - 20th Ave. E.Apt. 2A" },
        { "EmployeeID": 2, "FirstName": "Andrew", "LastName": "Fuller", "ReportsTo": null, "Country": "USA", "Title": "Vice President, Sales", "HireDate": "1992-08-14 00:00:00", "BirthDate": "1952-02-19 00:00:00", "City": "Tacoma", "Address": "908 W. Capital Way" },
        { "EmployeeID": 3, "FirstName": "Janet", "LastName": "Leverling", "ReportsTo": 2, "Country": "USA", "Title": "Sales Representative", "HireDate": "1992-04-01 00:00:00", "BirthDate": "1963-08-30 00:00:00", "City": "Kirkland", "Address": "722 Moss Bay Blvd." },
        { "EmployeeID": 4, "FirstName": "Margaret", "LastName": "Peacock", "ReportsTo": 2, "Country": "USA", "Title": "Sales Representative", "HireDate": "1993-05-03 00:00:00", "BirthDate": "1937-09-19 00:00:00", "City": "Redmond", "Address": "4110 Old Redmond Rd." },
        { "EmployeeID": 5, "FirstName": "Steven", "LastName": "Buchanan", "ReportsTo": 2, "Country": "UK", "Title": "Sales Manager", "HireDate": "1993-10-17 00:00:00", "BirthDate": "1955-03-04 00:00:00", "City": "London", "Address": "14 Garrett Hill" },
        { "EmployeeID": 6, "FirstName": "Michael", "LastName": "Suyama", "ReportsTo": 5, "Country": "UK", "Title": "Sales Representative", "HireDate": "1993-10-17 00:00:00", "BirthDate": "1963-07-02 00:00:00", "City": "London", "Address": "Coventry House Miner Rd." },
        { "EmployeeID": 7, "FirstName": "Robert", "LastName": "King", "ReportsTo": 5, "Country": "UK", "Title": "Sales Representative", "HireDate": "1994-01-02 00:00:00", "BirthDate": "1960-05-29 00:00:00", "City": "London", "Address": "Edgeham Hollow Winchester Way" },
        { "EmployeeID": 8, "FirstName": "Laura", "LastName": "Callahan", "ReportsTo": 2, "Country": "USA", "Title": "Inside Sales Coordinator", "HireDate": "1994-03-05 00:00:00", "BirthDate": "1958-01-09 00:00:00", "City": "Seattle", "Address": "4726 - 11th Ave. N.E." },
        { "EmployeeID": 9, "FirstName": "Anne", "LastName": "Dodsworth", "ReportsTo": 5, "Country": "UK", "Title": "Sales Representative", "HireDate": "1994-11-15 00:00:00", "BirthDate": "1966-01-27 00:00:00", "City": "London", "Address": "7 Houndstooth Rd." }
    ], []);

    const source = useMemo(() => ({
        dataFields: [
            { name: 'EmployeeID', type: 'number' },
            { name: 'ReportsTo', type: 'number' },
            { name: 'FirstName', type: 'string' },
            { name: 'LastName', type: 'string' },
            { name: 'Country', type: 'string' },
            { name: 'City', type: 'string' },
            { name: 'Address', type: 'string' },
            { name: 'Title', type: 'string' },
            { name: 'HireDate', type: 'date' },
            { name: 'BirthDate', type: 'date' }
        ],
        dataType: 'json',
        hierarchy: {
            keyDataField: { name: 'EmployeeID' },
            parentDataField: { name: 'ReportsTo' }
        },
        id: 'EmployeeID',
        localData: employees
    }), [employees]);

    const dataAdapter = useMemo(() => new jqx.dataAdapter(source), [source]);

    const columns = useMemo(() => [
        { columnGroup: 'Name', dataField: 'FirstName', minWidth: 100, text: 'FirstName', width: 180 },
        { columnGroup: 'Name', dataField: 'LastName', text: 'LastName', width: 200 },
        { dataField: 'Title', text: 'Title', width: 300 },
        { cellsFormat: 'd', dataField: 'BirthDate', text: 'Birth Date', width: 120 },
        { cellsFormat: 'd', dataField: 'HireDate', text: 'Hire Date', width: 120 },
        { dataField: 'Address', text: 'Address', width: 250 },
        { dataField: 'City', text: 'City', width: 120 },
        { dataField: 'Country', text: 'Country', width: 200 }
    ], []);

    const ready = useCallback(() => {
        setTimeout(() => {
            if (myTreeGrid.current) {
                myTreeGrid.current.expandRow(2);
                myTreeGrid.current.selectRow(2);
                myTreeGrid.current.focus();
            }
        });
    }, []);

    return (
        <div>
            <JqxTreeGrid
                theme="material-purple"
                ref={myTreeGrid}
                width="100%"
                editable={true}
                source={dataAdapter}
                columns={columns}
                ready={ready}
            />
            <div style={{ fontFamily: 'Verdana', fontSize: '12px', width: '670px' }}>
                <ul>
                    <li><b>Left Arrow</b> key - on an expanded record, collapses the record.</li>
                    <li><b>Left Arrow</b> key - on a collapsed or end record moves focus to the record's parent.</li>
                    <li><b>Right Arrow</b> key - on a collapsed record expands the record.</li>
                    <li><b>Right Arrow</b> key - on an expanded record, moves to the first child record, or does nothing on an end record.</li>
                    <li><b>Up Arrow</b> key is pressed - Selects the row above.</li>
                    <li><b>Down Arrow</b> key is pressed - Selects the row below.</li>
                    <li><b>Page Up/Down</b> is pressed - Navigate Up or Down with one page.</li>
                    <li><b>Home/End</b> is pressed - Navigate to the first or last row on the current page.</li>
                    <li><b>Enter</b> key is pressed - Saves the Edited Row.</li>
                    <li><b>Esc</b> key is pressed - Closes all Editors and Cancels the changes.</li>
                    <li><b>F2</b> key is pressed -  Enters edit mode for the currently selected row.</li>
                    <li><b>Shift+Arrow</b> key extends the selection.</li>
                    <li><b>Shift</b> extends the selection when an end user clicks on a row.</li>
                    <li><b>Ctrl</b> key is pressed - extends the selection when an end user clicks on a row. </li>
                    <li><b>Space</b> key is pressed - Checks/Unchecks the selected record(s). </li>
                </ul>
            </div>
        </div>
    );
};

export default App;