<?php

declare(strict_types=1);

/*
 * The MIT License (MIT)
 *
 * Copyright (c) 2014-2020 Spomky-Labs
 *
 * This software may be modified and distributed under the terms
 * of the MIT license.  See the LICENSE file for details.
 */

namespace Jose\Component\KeyManagement;

use Psr\Http\Client\ClientInterface;
use Psr\Http\Message\RequestFactoryInterface;
use RuntimeException;

abstract class UrlKeySetFactory
{
    /**
     * @var ClientInterface
     */
    private $client;

    /**
     * @var RequestFactoryInterface
     */
    private $requestFactory;

    /**
     * UrlKeySetFactory constructor.
     */
    public function __construct(ClientInterface $client, RequestFactoryInterface $requestFactory)
    {
        $this->client = $client;
        $this->requestFactory = $requestFactory;
    }

    /**
     * @throws RuntimeException if the response content is invalid
     */
    protected function getContent(string $url, array $header = []): string
    {
        $request = $this->requestFactory->createRequest('GET', $url);
        foreach ($header as $k => $v) {
            $request = $request->withHeader($k, $v);
        }
        $response = $this->client->sendRequest($request);

        if ($response->getStatusCode() >= 400) {
            throw new RuntimeException('Unable to get the key set.', $response->getStatusCode());
        }

        return $response->getBody()->getContents();
    }
}