$createResponse = \Illuminate\Support\Facades\Http::withToken($token)
                    ->accept('application/json')
                    ->post($baseUrlGo . $endpoint, $payload);
            }

            // [AUTO-CORRECCIÓN] Si hay error de duplicado, intentar con Serie NV02 como último recurso
            if (!$createResponse->successful() && strpos($createResponse->body(), '23000') !== false) {
                \Illuminate\Support\Facades\Log::warning("⚠️ [Ticket/Generar] Duplicado persistente. Cambiando a Serie NV02...");

                $payload['serie'] = 'NV02';
                $payload['correlativo'] = 1;
                $payload['numero'] = 1;

                $createResponse = \Illuminate\Support\Facades\Http::withToken($token)
                    ->accept('application/json')
                    ->post($baseUrlGo . $endpoint, $payload);
            }

            if ($createResponse->successful()) {
                $invoiceId = $createResponse->json('data.id');

                // Guardar en cache por 30 minutos para evitar duplicados al cambiar formato
                \Illuminate\Support\Facades\Cache::put($cacheKey, $invoiceId, 1800);

                $downloadUrl = $baseUrlGo . $endpoint . '/' . $invoiceId . '/download-pdf';

                if ($request->has('format')) {
                    $formatParam = $request->query('format');
                    if (in_array(strtolower($formatParam), ['a4', 'a5'])) {
                        $formatParam = strtoupper($formatParam);
                    }
                    $downloadUrl .= '?format=' . $formatParam;
                }

                $pdfResponse = \Illuminate\Support\Facades\Http::withToken($token)->get($downloadUrl);

                if ($pdfResponse->successful()) {
                    return response($pdfResponse->body(), 200)
                        ->header('Content-Type', 'application/pdf')
                        ->header('Content-Disposition', 'attachment; filename="ticket-' . $ordenId . '.pdf"');
                }

                return response()->json([
                    'success' => false,
                    'message' => 'Error al descargar PDF de API-GO (Paso 2)',
                    'details' => $pdfResponse->body(),
                    'url_intento' => $downloadUrl
                ], 502);
            }

            return response()->json([
                'success' => false,
                'message' => 'Error al crear borrador en API-GO (Paso 1)',