refined document sequence management

lib/features/tickets/blocs/ticket_shipping_cubit.dart

@@ -5,6 +5,7 @@ import 'package:flux/features/documents/data/tickets_shipment_repository.dart';
 import 'package:flux/features/documents/models/shipment_document_model.dart';
 import 'package:flux/features/master_data/providers/models/provider_location_model.dart';
 import 'package:flux/features/master_data/providers/models/provider_model.dart';
+import 'package:flux/features/settings/document_sequence/data/document_sequence_repository.dart';
 import 'package:get_it/get_it.dart';
 
 part 'ticket_shipping_state.dart';
@@ -12,6 +13,8 @@ part 'ticket_shipping_state.dart';
 class TicketShippingCubit extends Cubit<TicketShippingState> {
   final TicketsShipmentRepository _repository =
       GetIt.I<TicketsShipmentRepository>();
+  final DocumentSequenceRepository _sequenceRepository =
+      GetIt.I<DocumentSequenceRepository>();
   TicketShippingCubit({required List<String> ticketIds})
     : super(
         TicketShippingState(
@@ -79,16 +82,28 @@ class TicketShippingCubit extends Cubit<TicketShippingState> {
     );
   }
 
-  void toggleAutoNumber(bool value) {
+  Future<void> toggleAutoNumber(bool value) async {
+    // Aggiorniamo subito l'UI per mostrare che lo switch si è acceso
     emit(state.copyWith(isAutoNumber: value));
+
     if (value) {
-      final nextNumber = "DDT-${DateTime.now().year}-001";
-      emit(
-        state.copyWith(
-          document: state.document.copyWith(docNumber: nextNumber),
-        ),
-      );
+      // Se lo switch è acceso, chiediamo il numero al DB
+      try {
+        final nextNumber = await _sequenceRepository.getNextDocumentNumber(
+          'ddt',
+        );
+
+        emit(
+          state.copyWith(
+            document: state.document.copyWith(docNumber: nextNumber),
+          ),
+        );
+      } catch (e) {
+        // Se qualcosa va storto, spegniamo lo switch e mostriamo l'errore
+        emit(state.copyWith(isAutoNumber: false, errorMessage: e.toString()));
+      }
     } else {
+      // Se lo spegne, svuotiamo semplicemente il campo
       emit(state.copyWith(document: state.document.copyWith(docNumber: '')));
     }
   }