<?php
/**
 * Copyright since 2014 Waynet Sp. z o.o.
 * PrestaShop is an International Registered Trademark & Property of PrestaShop SA
 *
 * NOTICE OF LICENSE
 *
 * This source file is subject to the Open Software License (OSL 3.0)
 * that is bundled with this package in the file LICENSE.md.
 * It is also available through the world-wide-web at this URL:
 * https://opensource.org/licenses/OSL-3.0
 * If you did not receive a copy of the license and are unable to
 * obtain it through the world-wide-web, please send an email
 * to kontakt@waynet.pl so we can send you a copy immediately.
 *
 * DISCLAIMER
 *
 * Do not edit or add to this file if you wish to upgrade PrestaShop to newer
 * versions in the future. If you wish to customize PrestaShop for your
 * needs please refer to https://devdocs.prestashop-project.org/ for more information.
 *
 * @author    Waynet Sp. z o.o. <kontakt@waynet.pl>
 * @copyright since 2014 Waynet Sp. z o.o.
 * @license   https://opensource.org/licenses/OSL-3.0 Open Software License (OSL 3.0)
 */

declare(strict_types=1);

namespace Waynet\Security\JWT;

final class JsonWebKeySetProvider
{
    /** @var array<string|int, JsonWebKeyProviderInterface> */
    private $keyProviders = [];

    /** @param iterable<JsonWebKeyProviderInterface> $keyProviders */
    public function __construct(iterable $keyProviders)
    {
        foreach ($keyProviders as $key) {
            $this->addKeyProvider($key);
        }
    }

    public function getJsonWebKeySet(): array
    {
        return [
            'keys' => $this->getKeys(),
        ];
    }

    public function addKeyProvider(JsonWebKeyProviderInterface $keyProvider): self
    {
        $keyId = $keyProvider->getKeyId();

        if ($keyId) {
            $this->keyProviders[$keyId] = $keyProvider;
        } elseif (!in_array($keyProvider, $this->keyProviders, true)) {
            $this->keyProviders[] = $keyProvider;
        }

        return $this;
    }

    private function getKeys(): array
    {
        $keys = [];

        foreach ($this->keyProviders as $keyProvider) {
            if (null !== $key = $keyProvider->getJsonWebKey()) {
                $keys[] = $key;
            }
        }

        return $keys;
    }
}