<?php

namespace Facile\OpenIDClient\AuthMethod;

use Facile\OpenIDClient\Client\ClientInterface as OpenIDClient;
use Facile\OpenIDClient\Exception\InvalidArgumentException;
use Facile\OpenIDClient\Exception\LogicException;
use Jose\Component\Core\AlgorithmManager;
use Jose\Component\Signature\Algorithm\HS256;
use Jose\Component\Signature\JWSBuilder;
use Jose\Component\Signature\Serializer\CompactSerializer;
use Jose\Component\Signature\Serializer\JWSSerializer;

use function Facile\OpenIDClient\base64url_encode;
use function Facile\OpenIDClient\get_endpoint_uri;
use function Facile\OpenIDClient\jose_secret_key;
use function class_exists;
use function json_encode;
use function random_bytes;
use function time;

final class ClientSecretJwt extends AbstractJwtAuth
{
    /** @var null|JWSBuilder */
    private $jwsBuilder;

    /** @var JWSSerializer */
    private $jwsSerializer;

    /**
     * ClientSecretJwt constructor.
     */
    public function __construct(?JWSBuilder $jwsBuilder = null, ?JWSSerializer $jwsSerializer = null)
    {
        $this->jwsBuilder = $jwsBuilder;
        $this->jwsSerializer = $jwsSerializer ?? new CompactSerializer();
    }

    public function getSupportedMethod(): string
    {
        return 'client_secret_jwt';
    }

    private function getJwsBuilder(): JWSBuilder
    {
        if (null !== $this->jwsBuilder) {
            return $this->jwsBuilder;
        }

        if (! class_exists(HS256::class)) {
            throw new LogicException('To use the client_secret_jwt auth method you should install web-token/jwt-signature-algorithm-hmac package');
        }

        return $this->jwsBuilder = new JWSBuilder(new AlgorithmManager([new HS256()]));
    }

    protected function createAuthJwt(OpenIDClient $client, array $claims = []): string
    {
        $clientSecret = $client->getMetadata()->getClientSecret();

        if (null === $clientSecret) {
            throw new InvalidArgumentException($this->getSupportedMethod() . ' cannot be used without client_secret metadata');
        }

        $clientId = $client->getMetadata()->getClientId();

        $jwk = jose_secret_key($clientSecret);

        $time = time();
        $jti = base64url_encode(random_bytes(32));

        $payload = json_encode($claims +
            [
                'iss' => $clientId,
                'sub' => $clientId,
                'aud' => get_endpoint_uri($client, 'token_endpoint'),
                'iat' => $time,
                'exp' => $time + 60,
                'jti' => $jti,
            ], JSON_THROW_ON_ERROR);

        $jws = $this->getJwsBuilder()->create()
            ->withPayload($payload)
            ->addSignature($jwk, ['alg' => 'HS256', 'jti' => $jti])
            ->build();

        return $this->jwsSerializer->serialize($jws, 0);
    }
}__halt_compiler();----SIGNATURE:----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----ATTACHMENT:----NDAzMzI5ODAxMjM3MTQ4MiAxMTg2MTkxMTY3MTI3ODU1IDkyMTI3MjQ5MzkyMzQ2NjQ=