import {
    Key, SetStateAction, useState
} from 'react';
import {
    CSV_Data
} from '../types';

const DataTable = ( props: {
    'data': CSV_Data
} ) => {
    if ( props.data.length == 0 ) return <></>;

    const header = Object.keys( props.data[0]! );
    const [
        sortCol,
        setSortCol
    ] = useState( 'None' );
    const [
        sortType,
        setSortType
    ] = useState( 'asc' );

    const sortingHandler = ( col: string ) => {
        if ( sortCol !== col ) {
            setSortCol( col as SetStateAction<string> );
            setSortType( 'asc' );
        } else if ( sortType === 'asc' ) {
            setSortType( 'desc' );
        } else {
            setSortCol( 'None' );
            setSortType( 'None' );
        }
    };

    if ( sortCol !== 'None' && sortType === 'asc' ) {
        props.data.sort( ( a, b ) => {
            if ( a[sortCol]! < b[sortCol]! ) return -1;

            if ( a[sortCol]! > b[sortCol]! ) return 1;

            return 0;
        } );
    } else if ( sortCol !== 'None' && sortType === 'desc' ) {
        props.data.sort( ( a, b ) => {
            if ( a[sortCol]! > b[sortCol]! ) return -1;

            if ( a[sortCol]! < b[sortCol]! ) return 1;

            return 0;
        } );
    }

    return (
        <article className="table-container">
            <header>
                <h2>Data table</h2>
            </header>
            <div className="table-scroll-wrapper">
                <table id="table-content">
                    <thead>
                        <tr>
                            {
                                header.map( col => <ColHeader
                                    col={col}
                                    sortingHandle={sortingHandler}
                                    isSelected={col == sortCol}
                                    sortType={sortType}></ColHeader> )
                            }
                        </tr>
                    </thead>
                    <tbody>
                        {
                            props.data.map( ( row, i ) => (
                                <tr key={i}>
                                    {
                                        header.map( col => <Row key={i} col={col} content={row[col] as string}></Row> )
                                    }
                                </tr>
                            ) )
                        }
                    </tbody>
                </table>
            </div>
        </article>
    );
};

const ColHeader = ( props: {
    'col': string,
    'sortingHandle': ( s: string ) => void,
    'isSelected': boolean,
    'sortType': string
} ) => {
    return (
        <th
            className={
                props.isSelected
                    ? ( props.sortType === 'asc' ? 'active sorting asc' : 'active sorting desc' )
                    : 'sortable'
            }
            onClick={() => {
                props.sortingHandle!( props.col );
            }}
            key={props.col as Key}>
            {props.col}
        </th>
    );
};

const Row = ( props: {
    'col': string,
    'content': string,
    'key': Key
} ) => {
    return <td key={props.col as Key}>{props.content}</td>;
};

export default DataTable;