<?php


namespace App\Payment;


use App\Payment\PSPAdapters\AbstractPSPAdapter;

/**
 * Class PaymentService
 *
 * The payment service returns Adapters which help handling
 * payments for different PSPs. It can also help with manual payments
 *
 * @package App\Payment
 */
class PaymentService
{
    /**
     * Returns the concrete adapter.
     * e.g. An adapter that extends this class.
     *
     * The adapter knows how to both work with KMS and
     * a script from a PSP to process payments
     *
     * @return AbstractPSPAdapter
     */
    public function getAdapter(): AbstractPSPAdapter
    {
        $psp = config('payment.payment_service_provider');

        $adapterConfigKey = 'payment.payment_service_providers.'.$psp.'.adapter';
        $adapter = config($adapterConfigKey);

        if(!$adapter || !is_a($adapter, AbstractPSPAdapter::class, true))
            throw new \RuntimeException('The following payment configuration key did not exist or did not return a childclass of "'.AbstractPSPAdapter::class.'": '.$adapterConfigKey);

        return new $adapter;
    }
}