Inventory Management | Customer Management | Invoice Management Done | Commodity Rate Sync Done

kifi-app/lib/features/business/presentation/hub/business_hub_screen.dart

@@ -3,38 +3,69 @@ import 'package:flutter_riverpod/flutter_riverpod.dart';
 import 'package:lucide_icons/lucide_icons.dart';
 import '../../../../core/theme/nature_colors.dart';
 import '../../../inventory/presentation/product_list_screen.dart';
+import '../../../inventory/presentation/quick_adjust_stock_screen.dart';
+import '../../../inventory/presentation/uoms_list_screen.dart';
+import '../../../sales/presentation/customers_list_screen.dart';
+import '../../../sales/presentation/invoices_list_screen.dart';
+import '../../providers/business_provider.dart';
+import '../widgets/business_profile_form_sheet.dart';
 
 class BusinessHubScreen extends ConsumerWidget {
   const BusinessHubScreen({super.key});
 
   @override
   Widget build(BuildContext context, WidgetRef ref) {
+    final businessState = ref.watch(businessProfileProvider);
+    final profile = businessState.value;
+    
+    final title = (profile?.businessName != null && profile!.businessName.isNotEmpty) 
+        ? profile.businessName 
+        : 'Business Overview';
+    final subtitle = (profile?.address != null && profile!.address!.isNotEmpty) 
+        ? profile.address! 
+        : 'Manage your inventory and stock';
+
+    final featureState = ref.watch(businessFeatureProvider).value;
+    final bool showInventory = featureState?.inventoryManagement ?? false;
+    final bool showSales = featureState?.salesManagement ?? false;
+
     return SingleChildScrollView(
       padding: const EdgeInsets.all(24.0),
       child: Column(
         crossAxisAlignment: CrossAxisAlignment.start,
         children: [
-          Container(
-            padding: const EdgeInsets.all(16),
-            decoration: BoxDecoration(
-              color: Theme.of(context).colorScheme.primary.withOpacity(0.1),
-              borderRadius: BorderRadius.circular(16),
-              border: Border.all(color: Theme.of(context).colorScheme.primary.withOpacity(0.2)),
-            ),
-            child: Row(
-              children: [
-                Icon(LucideIcons.briefcase, color: Theme.of(context).colorScheme.primary, size: 32),
-                const SizedBox(width: 16),
-                Expanded(
-                  child: Column(
-                    crossAxisAlignment: CrossAxisAlignment.start,
-                    children: [
-                      Text('Business Overview', style: Theme.of(context).textTheme.titleLarge?.copyWith(fontWeight: FontWeight.bold)),
-                      const Text('Manage your inventory and stock', style: TextStyle(color: Colors.grey)),
-                    ],
+          InkWell(
+            onTap: () {
+              showModalBottomSheet(
+                context: context,
+                isScrollControlled: true,
+                backgroundColor: Colors.transparent,
+                builder: (context) => const BusinessProfileFormSheet(),
+              );
+            },
+            borderRadius: BorderRadius.circular(16),
+            child: Container(
+              padding: const EdgeInsets.all(16),
+              decoration: BoxDecoration(
+                color: Theme.of(context).colorScheme.primary.withOpacity(0.1),
+                borderRadius: BorderRadius.circular(16),
+                border: Border.all(color: Theme.of(context).colorScheme.primary.withOpacity(0.2)),
+              ),
+              child: Row(
+                children: [
+                  Icon(LucideIcons.briefcase, color: Theme.of(context).colorScheme.primary, size: 32),
+                  const SizedBox(width: 16),
+                  Expanded(
+                    child: Column(
+                      crossAxisAlignment: CrossAxisAlignment.start,
+                      children: [
+                        Text(title, style: Theme.of(context).textTheme.titleLarge?.copyWith(fontWeight: FontWeight.bold)),
+                        Text(subtitle, style: const TextStyle(color: Colors.grey)),
+                      ],
+                    ),
                   ),
-                ),
-              ],
+                ],
+              ),
             ),
           ),
           const SizedBox(height: 24),
@@ -46,56 +77,68 @@ class BusinessHubScreen extends ConsumerWidget {
             physics: const NeverScrollableScrollPhysics(),
             childAspectRatio: 1.2,
             children: [
-              _buildActionCard(
-                context, 
-                'Products Catalog', 
-                'View all products', 
-                LucideIcons.packageSearch, 
-                Colors.blue,
-                () => Navigator.push(context, MaterialPageRoute(builder: (_) => const ProductListScreen())),
-              ),
-              _buildActionCard(
-                context, 
-                'Adjust Stock', 
-                'Add or reduce inventory', 
-                LucideIcons.arrowRightLeft, 
-                Colors.orange,
-                () {
-                  // TODO: Navigate to Stock Adjustment
-                },
-              ),
-              _buildActionCard(
-                context, 
-                'Sales & Invoices', 
-                'Coming in Phase 2', 
-                LucideIcons.receipt, 
-                Colors.green,
-                () {},
-              ),
-              _buildActionCard(
-                context, 
-                'Customers', 
-                'Coming in Phase 2', 
-                LucideIcons.users, 
-                NatureColors.getColor('RECEIVABLES'),
-                () {},
-              ),
+              if (showInventory) ...[
+                _buildActionCard(
+                  context, 
+                  'Products Catalog', 
+                  'View all products', 
+                  LucideIcons.packageSearch, 
+                  Colors.blue,
+                  () => Navigator.push(context, MaterialPageRoute(builder: (_) => const ProductListScreen())),
+                ),
+                _buildActionCard(
+                  context, 
+                  'Adjust Stock', 
+                  'Quick Stock Edit', 
+                  LucideIcons.arrowRightLeft, 
+                  Colors.orange,
+                  () => Navigator.push(context, MaterialPageRoute(builder: (_) => const QuickAdjustStockScreen())),
+                ),
+                _buildActionCard(
+                  context, 
+                  'Units of Measure', 
+                  'Manage measurements', 
+                  LucideIcons.ruler, 
+                  Colors.purple,
+                  () => Navigator.push(context, MaterialPageRoute(builder: (_) => const UomsListScreen())),
+                ),
+              ],
+              if (showSales) ...[
+                _buildActionCard(
+                  context, 
+                  'Sales & Invoices', 
+                  'Create invoices', 
+                  LucideIcons.receipt, 
+                  Colors.green,
+                  () => Navigator.push(context, MaterialPageRoute(builder: (_) => const InvoicesListScreen())),
+                ),
+                _buildActionCard(
+                  context, 
+                  'Customers', 
+                  'Manage clients', 
+                  LucideIcons.users, 
+                  NatureColors.getColor('RECEIVABLES'),
+                  () => Navigator.push(context, MaterialPageRoute(builder: (_) => const CustomersListScreen())),
+                ),
+              ],
             ],
           ),
-          const SizedBox(height: 32),
-          Text('Low Stock Alerts', style: Theme.of(context).textTheme.titleLarge?.copyWith(fontWeight: FontWeight.bold)),
-          const SizedBox(height: 16),
-          // Placeholder for low stock items
-          Container(
-            padding: const EdgeInsets.all(24),
-            decoration: BoxDecoration(
-              color: Colors.grey.withOpacity(0.05),
-              borderRadius: BorderRadius.circular(16),
+          if (showInventory) ...[
+            const SizedBox(height: 32),
+            Text('Low Stock Alerts', style: Theme.of(context).textTheme.titleLarge?.copyWith(fontWeight: FontWeight.bold)),
+            const SizedBox(height: 16),
+            // Placeholder for low stock items
+            Container(
+              padding: const EdgeInsets.all(24),
+              decoration: BoxDecoration(
+                color: Colors.grey.withOpacity(0.05),
+                borderRadius: BorderRadius.circular(16),
+              ),
+              child: const Center(
+                child: Text('All products are adequately stocked.', style: TextStyle(color: Colors.grey)),
+              ),
             ),
-            child: const Center(
-              child: Text('All products are adequately stocked.', style: TextStyle(color: Colors.grey)),
-            ),
-          ),
+          ],
         ],
       ),
     );

kifi-app/lib/features/business/presentation/settings/business_settings_screen.dart

@@ -25,6 +25,13 @@ class _BusinessSettingsScreenState extends ConsumerState<BusinessSettingsScreen>
           _taxIncludedInPrice = profile.taxIncludedInPrice ?? false;
         });
       }
+      final feature = ref.read(businessFeatureProvider).value;
+      if (feature != null) {
+        setState(() {
+          _inventoryEnabled = feature.inventoryManagement;
+          _salesEnabled = feature.salesManagement;
+        });
+      }
     });
   }
 
@@ -45,17 +52,76 @@ class _BusinessSettingsScreenState extends ConsumerState<BusinessSettingsScreen>
             title: const Text('Inventory Management'),
             subtitle: const Text('Track stock levels, multiple locations, and products'),
             value: _inventoryEnabled,
-            onChanged: (val) => setState(() => _inventoryEnabled = val),
+            onChanged: (val) {
+              setState(() => _inventoryEnabled = val);
+              _saveFeatures();
+            },
             secondary: const Icon(LucideIcons.package),
           ),
           SwitchListTile(
             title: const Text('Sales & POS'),
             subtitle: const Text('Enable point of sale, invoicing, and receivables'),
             value: _salesEnabled,
-            onChanged: (val) => setState(() => _salesEnabled = val),
+            onChanged: (val) {
+              setState(() => _salesEnabled = val);
+              _saveFeatures();
+            },
             secondary: const Icon(LucideIcons.shoppingCart),
           ),
           const SizedBox(height: 32),
+          const Text('Inventory Strategy', style: TextStyle(fontSize: 18, fontWeight: FontWeight.bold, color: Colors.grey)),
+          const SizedBox(height: 16),
+          Consumer(
+            builder: (context, ref, child) {
+              final featureState = ref.watch(businessFeatureProvider);
+              final currentStrategy = featureState.value?.bomReductionStrategy ?? 'COMPONENTS_ONLY';
+              final deductParentStock = currentStrategy == 'PARENT_AND_COMPONENTS';
+              final stockDeductionOnInvoice = featureState.value?.stockDeductionOnInvoice ?? true;
+              
+              return Column(
+                children: [
+                  SwitchListTile(
+                    title: const Text('Deduct Parent Stock on BOM Sale'),
+                    subtitle: const Text('If enabled, selling an assembled product reduces both parent and component stock.'),
+                    value: deductParentStock,
+                    secondary: const Icon(LucideIcons.gitMerge),
+                    onChanged: (val) {
+                      if (featureState.value != null) {
+                        final newStrategy = val ? 'PARENT_AND_COMPONENTS' : 'COMPONENTS_ONLY';
+                        final updated = featureState.value!.copyWith(bomReductionStrategy: newStrategy);
+                        ref.read(businessFeatureProvider.notifier).updateFeatures(updated);
+                      }
+                    },
+                  ),
+                  SwitchListTile(
+                    title: const Text('Stock Deduction on Invoice'),
+                    subtitle: const Text('If enabled, finalizing an invoice automatically deducts product stock. Turn off for a two-step fulfillment process.'),
+                    value: stockDeductionOnInvoice,
+                    secondary: const Icon(LucideIcons.boxes),
+                    onChanged: (val) {
+                      if (featureState.value != null) {
+                        final updated = featureState.value!.copyWith(stockDeductionOnInvoice: val);
+                        ref.read(businessFeatureProvider.notifier).updateFeatures(updated);
+                      }
+                    },
+                  ),
+                  SwitchListTile(
+                    title: const Text('Use EAN/Barcode for Scanner'),
+                    subtitle: const Text('If disabled, the barcode scanner will search using the SKU field instead.'),
+                    value: (featureState.value?.barcodeSource ?? 'SKU') == 'BARCODE',
+                    secondary: const Icon(LucideIcons.scanLine),
+                    onChanged: (val) {
+                      if (featureState.value != null) {
+                        final updated = featureState.value!.copyWith(barcodeSource: val ? 'BARCODE' : 'SKU');
+                        ref.read(businessFeatureProvider.notifier).updateFeatures(updated);
+                      }
+                    },
+                  ),
+                ],
+              );
+            }
+          ),
+          const SizedBox(height: 32),
           const Text('Pricing & Taxation', style: TextStyle(fontSize: 18, fontWeight: FontWeight.bold, color: Colors.grey)),
           const SizedBox(height: 16),
           SwitchListTile(
@@ -80,4 +146,15 @@ class _BusinessSettingsScreenState extends ConsumerState<BusinessSettingsScreen>
       ref.read(businessProfileProvider.notifier).updateProfile(updated);
     }
   }
+
+  void _saveFeatures() {
+    final featureState = ref.read(businessFeatureProvider).value;
+    if (featureState != null) {
+      final updated = featureState.copyWith(
+        inventoryManagement: _inventoryEnabled,
+        salesManagement: _salesEnabled,
+      );
+      ref.read(businessFeatureProvider.notifier).updateFeatures(updated);
+    }
+  }
 }

kifi-app/lib/features/business/presentation/widgets/business_profile_form_sheet.dart

@@ -0,0 +1,288 @@
+import 'package:flutter/material.dart';
+import 'package:flutter_riverpod/flutter_riverpod.dart';
+import '../../domain/business_profile.dart';
+import '../../providers/business_provider.dart';
+import '../../providers/indian_states_provider.dart';
+
+class BusinessProfileFormSheet extends ConsumerStatefulWidget {
+  const BusinessProfileFormSheet({super.key});
+
+  @override
+  ConsumerState<BusinessProfileFormSheet> createState() => _BusinessProfileFormSheetState();
+}
+
+class _BusinessProfileFormSheetState extends ConsumerState<BusinessProfileFormSheet> {
+  final _formKey = GlobalKey<FormState>();
+  
+  late TextEditingController _businessNameController;
+  late TextEditingController _addressController;
+  late TextEditingController _contactPersonController;
+  late TextEditingController _contactNumberController;
+  late TextEditingController _emailController;
+  late TextEditingController _panController;
+  late TextEditingController _gstinController;
+  int? _selectedStateId;
+  
+  bool _isLoading = false;
+
+  @override
+  void initState() {
+    super.initState();
+    final profile = ref.read(businessProfileProvider).value;
+    
+    _businessNameController = TextEditingController(text: profile?.businessName ?? '');
+    _addressController = TextEditingController(text: profile?.address ?? '');
+    _contactPersonController = TextEditingController(text: profile?.contactPerson ?? '');
+    _contactNumberController = TextEditingController(text: profile?.contactNumber ?? '');
+    _emailController = TextEditingController(text: profile?.emailId ?? '');
+    _panController = TextEditingController(text: profile?.panNumber ?? '');
+    _gstinController = TextEditingController(text: profile?.gstin ?? '');
+    _selectedStateId = profile?.stateId;
+  }
+
+  @override
+  void dispose() {
+    _businessNameController.dispose();
+    _addressController.dispose();
+    _contactPersonController.dispose();
+    _contactNumberController.dispose();
+    _emailController.dispose();
+    _panController.dispose();
+    _gstinController.dispose();
+    super.dispose();
+  }
+
+  Future<void> _submit() async {
+    if (!_formKey.currentState!.validate()) return;
+    
+    setState(() => _isLoading = true);
+    
+    try {
+      final existingProfile = ref.read(businessProfileProvider).value;
+      
+      final profile = BusinessProfile(
+        id: existingProfile?.id,
+        userId: existingProfile?.userId,
+        businessName: _businessNameController.text.trim(),
+        address: _addressController.text.trim(),
+        stateId: _selectedStateId,
+        contactPerson: _contactPersonController.text.trim(),
+        contactNumber: _contactNumberController.text.trim(),
+        emailId: _emailController.text.trim(),
+        panNumber: _panController.text.trim().toUpperCase(),
+        gstin: _gstinController.text.trim().toUpperCase(),
+      );
+
+      await ref.read(businessProfileProvider.notifier).updateProfile(profile);
+      
+      if (mounted) {
+        Navigator.pop(context);
+        ScaffoldMessenger.of(context).showSnackBar(
+          const SnackBar(content: Text('Business profile updated successfully')),
+        );
+      }
+    } catch (e) {
+      if (mounted) {
+        ScaffoldMessenger.of(context).showSnackBar(
+          SnackBar(content: Text('Error: $e')),
+        );
+      }
+    } finally {
+      if (mounted) setState(() => _isLoading = false);
+    }
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    final statesState = ref.watch(indianStatesProvider);
+
+    return Container(
+      decoration: const BoxDecoration(
+        color: Colors.white,
+        borderRadius: BorderRadius.vertical(top: Radius.circular(20)),
+      ),
+      padding: EdgeInsets.only(
+        bottom: MediaQuery.of(context).viewInsets.bottom,
+      ),
+      child: DraggableScrollableSheet(
+        initialChildSize: 0.9,
+        minChildSize: 0.5,
+        maxChildSize: 0.95,
+        expand: false,
+        builder: (context, scrollController) {
+          return Column(
+            children: [
+              Padding(
+                padding: const EdgeInsets.all(16.0),
+                child: Row(
+                  mainAxisAlignment: MainAxisAlignment.spaceBetween,
+                  children: [
+                    const Text('Business Profile', style: TextStyle(fontSize: 20, fontWeight: FontWeight.bold)),
+                    IconButton(
+                      icon: const Icon(Icons.close),
+                      onPressed: () => Navigator.pop(context),
+                    ),
+                  ],
+                ),
+              ),
+              const Divider(height: 1),
+              Expanded(
+                child: Form(
+                  key: _formKey,
+                  child: ListView(
+                    controller: scrollController,
+                    padding: const EdgeInsets.all(16),
+                    children: [
+                      TextFormField(
+                        controller: _businessNameController,
+                        decoration: InputDecoration(labelText: 'Company Name', border: OutlineInputBorder(borderRadius: BorderRadius.circular(16), borderSide: BorderSide.none),
+                          enabledBorder: OutlineInputBorder(borderRadius: BorderRadius.circular(16), borderSide: BorderSide.none),
+                          focusedBorder: OutlineInputBorder(borderRadius: BorderRadius.circular(16), borderSide: const BorderSide(color: Colors.blue, width: 2)),
+                          contentPadding: const EdgeInsets.symmetric(horizontal: 20, vertical: 16),
+                          filled: true, 
+                          fillColor: Colors.grey[100]),
+                        validator: (v) => v == null || v.isEmpty ? 'Company name is required' : null,
+                      ),
+                      const SizedBox(height: 16),
+                      TextFormField(
+                        controller: _addressController,
+                        decoration: InputDecoration(labelText: 'Address', border: OutlineInputBorder(borderRadius: BorderRadius.circular(16), borderSide: BorderSide.none),
+                          enabledBorder: OutlineInputBorder(borderRadius: BorderRadius.circular(16), borderSide: BorderSide.none),
+                          focusedBorder: OutlineInputBorder(borderRadius: BorderRadius.circular(16), borderSide: const BorderSide(color: Colors.blue, width: 2)),
+                          contentPadding: const EdgeInsets.symmetric(horizontal: 20, vertical: 16),
+                          filled: true, 
+                          fillColor: Colors.grey[100]),
+                        maxLines: 2,
+                      ),
+                      const SizedBox(height: 16),
+                      statesState.when(
+                        data: (states) {
+                          return DropdownButtonFormField<int>(
+                            value: _selectedStateId,
+                            decoration: InputDecoration(labelText: 'State', border: OutlineInputBorder(borderRadius: BorderRadius.circular(16), borderSide: BorderSide.none),
+                          enabledBorder: OutlineInputBorder(borderRadius: BorderRadius.circular(16), borderSide: BorderSide.none),
+                          focusedBorder: OutlineInputBorder(borderRadius: BorderRadius.circular(16), borderSide: const BorderSide(color: Colors.blue, width: 2)),
+                          contentPadding: const EdgeInsets.symmetric(horizontal: 20, vertical: 16),
+                          filled: true, 
+                          fillColor: Colors.grey[100]),
+                            items: states.map((s) {
+                              return DropdownMenuItem(
+                                value: s.id,
+                                child: Text('${s.name} (${s.gstCode})'),
+                              );
+                            }).toList(),
+                            onChanged: (val) {
+                              setState(() {
+                                _selectedStateId = val;
+                              });
+                            },
+                          );
+                        },
+                        loading: () => const Center(
+                          child: Padding(
+                            padding: EdgeInsets.all(16.0),
+                            child: CircularProgressIndicator(),
+                          ),
+                        ),
+                        error: (e, stack) => Text('Failed to load states: $e', style: const TextStyle(color: Colors.red)),
+                      ),
+                      const SizedBox(height: 16),
+                      TextFormField(
+                        controller: _contactPersonController,
+                        decoration: InputDecoration(labelText: 'Contact Person', border: OutlineInputBorder(borderRadius: BorderRadius.circular(16), borderSide: BorderSide.none),
+                          enabledBorder: OutlineInputBorder(borderRadius: BorderRadius.circular(16), borderSide: BorderSide.none),
+                          focusedBorder: OutlineInputBorder(borderRadius: BorderRadius.circular(16), borderSide: const BorderSide(color: Colors.blue, width: 2)),
+                          contentPadding: const EdgeInsets.symmetric(horizontal: 20, vertical: 16),
+                          filled: true, 
+                          fillColor: Colors.grey[100]),
+                      ),
+                      const SizedBox(height: 16),
+                      TextFormField(
+                        controller: _contactNumberController,
+                        decoration: InputDecoration(labelText: 'Contact Number', border: OutlineInputBorder(borderRadius: BorderRadius.circular(16), borderSide: BorderSide.none),
+                          enabledBorder: OutlineInputBorder(borderRadius: BorderRadius.circular(16), borderSide: BorderSide.none),
+                          focusedBorder: OutlineInputBorder(borderRadius: BorderRadius.circular(16), borderSide: const BorderSide(color: Colors.blue, width: 2)),
+                          contentPadding: const EdgeInsets.symmetric(horizontal: 20, vertical: 16),
+                          filled: true, 
+                          fillColor: Colors.grey[100]),
+                        keyboardType: TextInputType.phone,
+                      ),
+                      const SizedBox(height: 16),
+                      TextFormField(
+                        controller: _emailController,
+                        decoration: InputDecoration(labelText: 'Email ID', border: OutlineInputBorder(borderRadius: BorderRadius.circular(16), borderSide: BorderSide.none),
+                          enabledBorder: OutlineInputBorder(borderRadius: BorderRadius.circular(16), borderSide: BorderSide.none),
+                          focusedBorder: OutlineInputBorder(borderRadius: BorderRadius.circular(16), borderSide: const BorderSide(color: Colors.blue, width: 2)),
+                          contentPadding: const EdgeInsets.symmetric(horizontal: 20, vertical: 16),
+                          filled: true, 
+                          fillColor: Colors.grey[100]),
+                        keyboardType: TextInputType.emailAddress,
+                      ),
+                      const SizedBox(height: 16),
+                      TextFormField(
+                        controller: _panController,
+                        textCapitalization: TextCapitalization.characters,
+                        decoration: InputDecoration(labelText: 'PAN Number', border: OutlineInputBorder(borderRadius: BorderRadius.circular(16), borderSide: BorderSide.none),
+                          enabledBorder: OutlineInputBorder(borderRadius: BorderRadius.circular(16), borderSide: BorderSide.none),
+                          focusedBorder: OutlineInputBorder(borderRadius: BorderRadius.circular(16), borderSide: const BorderSide(color: Colors.blue, width: 2)),
+                          contentPadding: const EdgeInsets.symmetric(horizontal: 20, vertical: 16),
+                          filled: true, 
+                          fillColor: Colors.grey[100]),
+                        validator: (v) {
+                          if (v != null && v.isNotEmpty) {
+                            final regex = RegExp(r'^[A-Z]{5}[0-9]{4}[A-Z]{1}$');
+                            if (!regex.hasMatch(v.toUpperCase())) {
+                              return 'Invalid PAN format';
+                            }
+                          }
+                          return null;
+                        },
+                      ),
+                      const SizedBox(height: 16),
+                      TextFormField(
+                        controller: _gstinController,
+                        textCapitalization: TextCapitalization.characters,
+                        decoration: InputDecoration(labelText: 'GSTIN', border: OutlineInputBorder(borderRadius: BorderRadius.circular(16), borderSide: BorderSide.none),
+                          enabledBorder: OutlineInputBorder(borderRadius: BorderRadius.circular(16), borderSide: BorderSide.none),
+                          focusedBorder: OutlineInputBorder(borderRadius: BorderRadius.circular(16), borderSide: const BorderSide(color: Colors.blue, width: 2)),
+                          contentPadding: const EdgeInsets.symmetric(horizontal: 20, vertical: 16),
+                          filled: true, 
+                          fillColor: Colors.grey[100]),
+                        validator: (v) {
+                          if (v != null && v.isNotEmpty) {
+                            final regex = RegExp(r'^[0-9]{2}[A-Z]{5}[0-9]{4}[A-Z]{1}[1-9A-Z]{1}Z[0-9A-Z]{1}$');
+                            if (!regex.hasMatch(v.toUpperCase())) {
+                              return 'Invalid GSTIN format';
+                            }
+                          }
+                          return null;
+                        },
+                      ),
+                      const SizedBox(height: 24),
+                      SizedBox(
+                        width: double.infinity,
+                        child: ElevatedButton(
+                          onPressed: _isLoading ? null : _submit,
+                          style: ElevatedButton.styleFrom(
+                            backgroundColor: Colors.blue,
+                            foregroundColor: Colors.white,
+                            padding: const EdgeInsets.symmetric(vertical: 16),
+                            shape: RoundedRectangleBorder(borderRadius: BorderRadius.circular(12)),
+                          ),
+                          child: _isLoading
+                              ? const SizedBox(height: 20, width: 20, child: CircularProgressIndicator(color: Colors.white, strokeWidth: 2))
+                              : const Text('Save Business Profile', style: TextStyle(fontSize: 16, fontWeight: FontWeight.bold)),
+                        ),
+                      ),
+                      const SizedBox(height: 32),
+                    ],
+                  ),
+                ),
+              ),
+            ],
+          );
+        },
+      ),
+    );
+  }
+}