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lib/core/di/providers.dart

@@ -7,8 +7,11 @@ import '../../features/auth/domain/usecases/login_usecase.dart';
 import '../../features/auth/presentation/providers/auth_provider.dart';
 import '../../features/products/data/datasources/products_remote_datasource.dart';
 import '../../features/products/data/repositories/products_repository_impl.dart';
+import '../../features/products/domain/entities/product_stage_entity.dart';
 import '../../features/products/domain/repositories/products_repository.dart';
+import '../../features/products/domain/usecases/get_product_detail_usecase.dart';
 import '../../features/products/domain/usecases/get_products_usecase.dart';
+import '../../features/products/presentation/providers/product_detail_provider.dart';
 import '../../features/products/presentation/providers/products_provider.dart';
 import '../../features/warehouse/data/datasources/warehouse_remote_datasource.dart';
 import '../../features/warehouse/data/repositories/warehouse_repository_impl.dart';
@@ -269,6 +272,13 @@ final getProductsUseCaseProvider = Provider<GetProductsUseCase>((ref) {
   return GetProductsUseCase(repository);
 });
 
+/// Get product detail use case provider
+/// Encapsulates product detail fetching business logic
+final getProductDetailUseCaseProvider = Provider<GetProductDetailUseCase>((ref) {
+  final repository = ref.watch(productsRepositoryProvider);
+  return GetProductDetailUseCase(repository);
+});
+
 // Presentation Layer
 
 /// Products state notifier provider
@@ -340,6 +350,48 @@ final productsErrorProvider = Provider<String?>((ref) {
   return productsState.error;
 });
 
+/// Product detail state notifier provider
+/// Manages product detail state for a specific product in a warehouse
+/// This needs to be a family provider to support multiple product details
+final productDetailProvider =
+    StateNotifierProvider.family<ProductDetailNotifier, ProductDetailState, String>(
+  (ref, _) {
+    final getProductDetailUseCase = ref.watch(getProductDetailUseCaseProvider);
+    return ProductDetailNotifier(getProductDetailUseCase);
+  },
+);
+
+/// Convenient providers for product detail state
+
+/// Provider to get product stages list
+/// Usage: ref.watch(productStagesProvider(key))
+final productStagesProvider = Provider.family<List<ProductStageEntity>, String>((ref, key) {
+  final state = ref.watch(productDetailProvider(key));
+  return state.stages;
+});
+
+/// Provider to get selected product stage
+/// Usage: ref.watch(selectedProductStageProvider(key))
+final selectedProductStageProvider = Provider.family<ProductStageEntity?, String>((ref, key) {
+  final state = ref.watch(productDetailProvider(key));
+  return state.selectedStage;
+});
+
+/// Provider to check if product detail is loading
+/// Usage: ref.watch(isProductDetailLoadingProvider(key))
+final isProductDetailLoadingProvider = Provider.family<bool, String>((ref, key) {
+  final state = ref.watch(productDetailProvider(key));
+  return state.isLoading;
+});
+
+/// Provider to get product detail error
+/// Returns null if no error
+/// Usage: ref.watch(productDetailErrorProvider(key))
+final productDetailErrorProvider = Provider.family<String?, String>((ref, key) {
+  final state = ref.watch(productDetailProvider(key));
+  return state.error;
+});
+
 /// ========================================================================
 /// USAGE EXAMPLES
 /// ========================================================================