<?php
declare(strict_types=1);
namespace UploadLogger\Core\Services;

final class RequestService
{
    public function uploadClean(string $str): string
    {
        return str_replace(["\n", "\r", "\t"], '_', (string)$str);
    }

    public function normalizeValue(mixed $value): mixed
    {
        if (is_array($value)) {
            $out = [];
            foreach ($value as $k => $v) {
                $out[$k] = $this->normalizeValue($v);
            }
            return $out;
        }

        if (is_bool($value) || is_int($value) || is_float($value) || $value === null) {
            return $value;
        }

        $str = (string)$value;
        return preg_replace('/[\x00-\x1F\x7F]/', '_', $str);
    }

    public function generateRequestId(): string
    {
        try {
            return bin2hex(random_bytes(8));
        } catch (\Throwable $e) {
            return uniqid('req', true);
        }
    }

    public function getClientIp(): string
    {
        return $_SERVER['REMOTE_ADDR'] ?? 'unknown';
    }

    public function getUserId(): string
    {
        if (isset($_SESSION) && is_array($_SESSION) && isset($_SESSION['user_id'])) {
            return (string)$_SESSION['user_id'];
        }
        if (!empty($_SERVER['PHP_AUTH_USER'])) {
            return (string)$_SERVER['PHP_AUTH_USER'];
        }
        return 'guest';
    }

    /**
     * @return array{0:string,1:string,2:string,3:string,4:int,5:string,6:string}
     */
    public function getRequestSummary(bool $logUserAgent = true): array
    {
        $ip     = $this->getClientIp();
        $uri    = $_SERVER['REQUEST_URI'] ?? 'unknown';
        $method = $_SERVER['REQUEST_METHOD'] ?? 'unknown';

        $ctype  = $_SERVER['CONTENT_TYPE'] ?? '';
        $clen   = (int)($_SERVER['CONTENT_LENGTH'] ?? 0);

        $ua = $logUserAgent ? ($_SERVER['HTTP_USER_AGENT'] ?? '') : '';

        $te = $_SERVER['HTTP_TRANSFER_ENCODING'] ?? '';

        return [$ip, $uri, $method, $ctype, $clen, $ua, $te];
    }
}