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

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

    const { columns, source, ready } = useMemo(() => {
        const employees: any[] = [
            { "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: any = {
            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
        };

        const dataAdapter: any = new jqx.dataAdapter(source);

        const columns = [
            { dataField: 'FirstName', text: 'FirstName', width: 200 },
            { dataField: 'LastName', text: 'LastName', width: 150 },
            { dataField: 'Title', text: 'Title', width: 160 },
            { 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: 150 },
            { dataField: 'Country', text: 'Country', width: 120 }
        ];

        const ready = (): void => {
            setTimeout(() => {
                myTreeGrid.current!.expandRow(2);
            });
        };

        return { columns, source: dataAdapter, ready };
    }, []);

    const exportClick = useCallback((type: string) => {
        myTreeGrid.current?.exportData(type);
    }, []);

    const buttonsStyle: React.CSSProperties = {
        float: "left",
        marginLeft: 10
    };

    return (
        <div>
            <JqxTreeGrid
                theme="material-purple"
                ref={myTreeGrid}
                width="100%"
                source={source}
                columns={columns}
                ready={ready}
            />
            <div style={{ marginTop: 20 }}>
                <div style={{ float: "left" }}>
                    <JqxButton theme="material-purple" onClick={() => exportClick('xls')}>Export to Excel</JqxButton>
                    <br />
                    <br />
                    <JqxButton theme="material-purple" onClick={() => exportClick('xml')}>Export to XML</JqxButton>
                </div>
                <div style={buttonsStyle}>
                    <JqxButton theme="material-purple" onClick={() => exportClick('csv')}>Export to CSV</JqxButton>
                    <br />
                    <br />
                    <JqxButton theme="material-purple" onClick={() => exportClick('tsv')}>Export to TSV</JqxButton>
                </div>
                <div style={buttonsStyle}>
                    <JqxButton theme="material-purple" onClick={() => exportClick('html')}>Export to HTML</JqxButton>
                    <br />
                    <br />
                    <JqxButton theme="material-purple" onClick={() => exportClick('json')}>Export to JSON</JqxButton>
                </div>
                <div style={buttonsStyle}>
                    <JqxButton theme="material-purple" onClick={() => exportClick('pdf')}>Export to PDF</JqxButton>
                </div>
            </div>
        </div>
    );
};

export default App;