feat: add payment intent handling in PurchaseController with validation and QR generation

app/Domains/Purchase/Controllers/PurchaseController.php

@@ -50,7 +50,67 @@ class PurchaseController extends Controller
         );
     }
 
+    public function paymentIntent(\App\Domains\Purchase\Requests\PaymentIntentRequest $request, Tenant $tenant, Purchase $compra): JsonResponse
+    {
+        $compra = $this->resolveScopedPurchase($tenant, $request->user()->id, $compra);
+        $method = $request->validated('method');
 
+        $compra->update([
+            'payment_method' => $method,
+        ]);
+
+        if ($method === 'transfer') {
+            $bankAccount = $tenant->selectedBankAccount;
+
+            return response()->json([
+                'payment_method' => 'transfer',
+                'transfer_data' => $bankAccount ? [
+                    'titular' => $bankAccount->titular,
+                    'entidad' => $bankAccount->entidad,
+                    'alias' => $bankAccount->alias,
+                    'cvu' => $bankAccount->cvu,
+                ] : null,
+            ]);
+        }
+
+        if ($method === 'qr') {
+            $telepagosQr = $compra->telepagosQr;
+
+            if (!$telepagosQr) {
+                $telepagosService = new \App\Domains\Integration\Services\TelepagosIntegrationService();
+                $telepagosService->forTenant($tenant->codigo);
+                
+                try {
+                    $qrResponse = $telepagosService->generateQr(
+                        $compra->getTotalAmount(),
+                        'Compra',
+                        "Compra #{$compra->id}"
+                    );
+
+                    $telepagosQr = $compra->telepagosQr()->create([
+                        'qr_order_id' => (string) ($qrResponse['id'] ?? $qrResponse['order_id'] ?? $qrResponse['cashin_id'] ?? ''),
+                        'qr_code' => $qrResponse['qr'] ?? $qrResponse['qr_code'] ?? $qrResponse['qr_data'] ?? '',
+                    ]);
+                } catch (\Exception $e) {
+                    return response()->json([
+                        'message' => 'Error generating QR: ' . $e->getMessage()
+                    ], 500);
+                }
+            }
+
+            return response()->json([
+                'payment_method' => 'qr',
+                'qr_data' => [
+                    'qr_code' => $telepagosQr->qr_code,
+                    'qr_order_id' => $telepagosQr->qr_order_id,
+                ],
+            ]);
+        }
+
+        return response()->json([
+            'message' => 'Invalid payment method.',
+        ], 400);
+    }
 
     protected function resolveScopedPurchase(Tenant $tenant, int $userId, Purchase $purchase): Purchase
     {