<?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\Helper;

class UriResolver
{
    public static function resolve(string $uri, string $baseUri): string
    {
        $uriParts = parse_url($uri);

        if (!empty($uriParts['host'])) {
            return $uri;
        }

        $baseUriParts = parse_url($baseUri);
        $uriParts['path'] = self::resolvePath($baseUriParts, $uriParts);
        $uriParts += $baseUriParts;

        return http_build_url($uriParts);
    }

    private static function resolvePath(array $baseUri, array $uri): string
    {
        $basePath = $baseUri['path'] ?? null;
        $path = $uri['path'] ?? null;

        if (null === $path) {
            $path = $basePath;
        } elseif ('/' !== $path[0]) {
            if (null === $basePath) {
                $path = '/' . $path;
            } else {
                $segments = explode('/', $basePath);
                array_splice($segments, -1, 1, [$path]);
                $path = implode('/', $segments);
            }
        }

        return empty($path) ? '/' : $path;
    }
}