<?php

/**
 * Class IOFactory
 *
 * Class for creating readers for pairing files
 *
 * @author    Jeroen De Meerleer <schaak@jeroened.be>
 * @category  Main
 * @package   Libpairtwo
 * @copyright Copyright (c) 2018-2019 Jeroen De Meerleer <schaak@jeroened.be>
 */

namespace JeroenED\Libpairtwo;

use JeroenED\LibPairtwo\Exceptions\LibpairtwoException;
use JeroenED\Libpairtwo\Interfaces\ReaderInterface;

/**
 * Class IOFactory
 *
 * Class for creating readers for pairing files
 *
 * @author    Jeroen De Meerleer <schaak@jeroened.be>
 * @category  Main
 * @package   Libpairtwo
 * @copyright Copyright (c) 2018-2019 Jeroen De Meerleer <schaak@jeroened.be>
 */
abstract class IOFactory
{
    /**
     * Compatible readers
     *
     * @var array
     */
    private static $Readers = [
        'Swar-4'    => Readers\Swar4::class,
        'Pairtwo-6' => Readers\Pairtwo6::class,
        'Pairtwo-5' => Readers\Pairtwo6::class // File structure identical
    ];

    /**
     * Creates a reader for $type
     *
     * Compatible types are Swar-4, Pairtwo-5, Pairtwo-6
     *
     * @param string $type
     *
     * @return ReaderInterface
     * @throws LibpairtwoException
     */
    public static function createReader(string $type): ReaderInterface
    {
        if (!isset(self::$Readers[ $type ])) {
            throw new LibpairtwoException("Cannot read type $type");
        }

        // create reader class
        $readerClass = self::$Readers[ $type ];

        return new $readerClass();
    }
}