// ... existing code ...

class _WorkOrderDetailState extends State<WorkOrderDetail> {
  // ... existing code ...

  Future<void> fetchData() async {
    try {
      final wo = await apiService.fetchWorkOrder(widget.workOrderId);
      setState(() {
        futureWorkOrder = Future.value(wo);
        workOrder = wo;
        woStatus = int.parse('${workOrder!.woStatus}');

        // ... existing controller assignments ...

        // Process items and auto-select spareparts
        workOrder!.items.forEach((item) {
          if (item.source == 1) { // Sparepart
            // Add to selected items map
            _selectedItemsSparepart[int.parse(item.itemId)] = {
              'count': item.qtyJual,
              'ws_stock_id': item.wsStockId,
              'harga_offline': item.hargaJual,
              'diskon': item.diskonJual,
              'barcode': item.barcode,
              // Add other needed fields
            };

            // Update other sparepart related variables
            itemDetailSparepartIdList = item.itemId;
            sourceSparepartList = item.source;
            wsStockIdSparepart = item.wsStockId;
            barcodeListSparepart = item.barcode;
            quantityListSparePart = item.qtyJual;
            listSubSparepartController = item.hargaJual;
            discountListSparepart = item.diskonJual;
            totalListSparepart = item.totalJual;
            branchSparepartIdList = item.branchServiceId;
            totalHarusDibayar += item.totalJual;
          } else {
            // Existing service item processing
            serviceIdList = item.itemId;
            sourceServiceList = item.source;
            // ... rest of service assignments
          }
        });

        // Fetch details for selected spareparts
        _fetchDetailsAndUpdateAllSelectedItems();
      });
    } catch (e) {
      print('Error fetching data: $e');
    }
  }

  // Update _fetchDetailsAndUpdateAllSelectedItems to handle existing selections
  Future<void> _fetchDetailsAndUpdateAllSelectedItems() async {
    for (var entry in _selectedItemsSparepart.entries) {
      final item_detail_id = entry.key.toString();
      final ws_stock_id = entry.value['ws_stock_id'];

      try {
        final url = 'https://devapi.dyvolt.com/api/warehousestok/get-item-detail-byws';
        final response = await http.post(
          Uri.parse(url),
          headers: {
            'Authorization': 'Bearer $token',
            'Accept': 'application/vnd.api+json',
            'Content-Type': 'application/vnd.api+json',
          },
          body: jsonEncode({
            'item_detail_id': item_detail_id,
            'ws_stock_id': ws_stock_id,
          }),
        );

        if (response.statusCode == 200) {
          final data = json.decode(response.body);
          final itemData = data['data'];

          setState(() {
            // Preserve existing count and other values while updating with new data
            _selectedItemsSparepart[int.parse(item_detail_id)] = {
              ..._selectedItemsSparepart[int.parse(item_detail_id)]!,
              'harga_offline': itemData['harga_offline'],
              'item_name': itemData['item_name'],
              'itemcode': itemData['itemcode'],
              'size': itemData['size'],
              'stock': itemData['stock'],
              'barcode': itemData['barcode'],
              'diskon': itemData['diskon'],
              'item_detail_id': itemData['item_detail_id'],
              'warehouse_type': itemData['warehouse_type'],
              'images': itemData['images'],
              'url_images': itemData['url_images'],
            };
          });
        }
      } catch (e) {
        print('Error fetching details for item $item_detail_id: $e');
      }
    }
  }

  // ... rest of existing code ...
}