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

use App\Core\Database;

final class AuditService
{
    public static function log(
        string $action,
        ?string $tenantId = null,
        ?string $userId = null,
        ?string $entityType = null,
        ?string $entityId = null,
        ?array $oldData = null,
        ?array $newData = null,
        ?array $metadata = null
    ): void {
        try {
            $db = Database::getInstance();
            $stmt = $db->prepare("INSERT INTO audit_logs 
                (tenant_id, user_id, action, entity_type, entity_id, old_data, new_data, ip_address, user_agent, metadata, created_at) 
                VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?, ?, NOW())");
            $stmt->execute([
                $tenantId,
                $userId,
                $action,
                $entityType,
                $entityId,
                $oldData ? json_encode($oldData, JSON_UNESCAPED_UNICODE) : null,
                $newData ? json_encode($newData, JSON_UNESCAPED_UNICODE) : null,
                $_SERVER['REMOTE_ADDR'] ?? null,
                $_SERVER['HTTP_USER_AGENT'] ?? null,
                $metadata ? json_encode($metadata, JSON_UNESCAPED_UNICODE) : null,
            ]);
        } catch (\Throwable $e) {
            error_log('[Audit] Failed: ' . $e->getMessage());
        }
    }
}