<?php

declare(strict_types=1);

namespace Laminas\Diactoros;

use Laminas\Diactoros\ServerRequestFilter\FilterServerRequestInterface;
use Laminas\Diactoros\ServerRequestFilter\FilterUsingXForwardedHeaders;
use Psr\Http\Message\ServerRequestFactoryInterface;
use Psr\Http\Message\ServerRequestInterface;

use function array_key_exists;
use function is_callable;

/**
 * Class for marshaling a request object from the current PHP environment.
 */
class ServerRequestFactory implements ServerRequestFactoryInterface
{
    /**
     * Function to use to get apache request headers; present only to simplify mocking.
     *
     * @var callable
     */
    private static $apacheRequestHeaders = 'apache_request_headers';

    /**
     * Create a request from the supplied superglobal values.
     *
     * If any argument is not supplied, the corresponding superglobal value will
     * be used.
     *
     * The ServerRequest created is then passed to the fromServer() method in
     * order to marshal the request URI and headers.
     *
     * @see fromServer()
     *
     * @param array $server $_SERVER superglobal
     * @param array $query $_GET superglobal
     * @param array $body $_POST superglobal
     * @param array $cookies $_COOKIE superglobal
     * @param array $files $_FILES superglobal
     * @param null|FilterServerRequestInterface $requestFilter If present, the
     *     generated request will be passed to this instance and the result
     *     returned by this method. When not present, a default instance of
     *     FilterUsingXForwardedHeaders is created, using the `trustReservedSubnets()`
     *     constructor.
     */
    public static function fromGlobals(
        ?array $server = null,
        ?array $query = null,
        ?array $body = null,
        ?array $cookies = null,
        ?array $files = null,
        ?FilterServerRequestInterface $requestFilter = null
    ): ServerRequest {
        $requestFilter = $requestFilter ?: FilterUsingXForwardedHeaders::trustReservedSubnets();

        $server  = normalizeServer(
            $server ?: $_SERVER,
            is_callable(self::$apacheRequestHeaders) ? self::$apacheRequestHeaders : null
        );
        $files   = normalizeUploadedFiles($files ?: $_FILES);
        $headers = marshalHeadersFromSapi($server);

        if (null === $cookies && array_key_exists('cookie', $headers)) {
            $cookies = parseCookieHeader($headers['cookie']);
        }

        return $requestFilter(new ServerRequest(
            $server,
            $files,
            UriFactory::createFromSapi($server, $headers),
            marshalMethodFromSapi($server),
            'php://input',
            $headers,
            $cookies ?: $_COOKIE,
            $query ?: $_GET,
            $body ?: $_POST,
            marshalProtocolVersionFromSapi($server)
        ));
    }

    /**
     * {@inheritDoc}
     */
    public function createServerRequest(string $method, $uri, array $serverParams = []): ServerRequestInterface
    {
        $uploadedFiles = [];

        return new ServerRequest(
            $serverParams,
            $uploadedFiles,
            $uri,
            $method,
            'php://temp'
        );
    }
}