import 'package:flutter_riverpod/flutter_riverpod.dart';
import '../billing/billing_providers.dart';
import 'entitlement_coordinator.dart';
import 'entitlement_state.dart';
import 'entitlement_storage.dart';
import 'feature_access_service.dart';

/// Provider for the physical entitlement storage contract.
/// Can be overridden in tests with [InMemoryEntitlementStorage].
final entitlementStorageProvider = Provider<EntitlementStorage>((ref) {
  return const SecureEntitlementStorage();
});

/// Provider for the [EntitlementCoordinator] which bridges store events to entitlement state.
final entitlementCoordinatorProvider =
    ChangeNotifierProvider<EntitlementCoordinator>((ref) {
      final billing = ref.watch(billingServiceProvider);
      final storage = ref.watch(entitlementStorageProvider);
      final verifier = ref.watch(purchaseVerificationServiceProvider);
      final queue = ref.watch(verificationQueueProvider);
      return EntitlementCoordinator(
        billingService: billing,
        storage: storage,
        verificationService: verifier,
        verificationQueue: queue,
      );
    });

/// Authoritative entitlement state provider.
/// Follows the state published by [EntitlementCoordinator].
final entitlementProvider = Provider<EntitlementState>((ref) {
  final coordinator = ref.watch(entitlementCoordinatorProvider);
  return coordinator.state;
});

/// Centralized provider for checking feature accessibility.
/// Consumers watch this provider and call [FeatureAccessService.canAccess].
final featureAccessProvider = Provider<FeatureAccessService>((ref) {
  final state = ref.watch(entitlementProvider);
  return FeatureAccessService(state);
});