import 'package:flutter/material.dart';
import 'package:flutter_riverpod/flutter_riverpod.dart';
import 'package:flutter_test/flutter_test.dart';
import 'package:motorcycle_dash/features/dashboard/widgets/dashboard_alert_region.dart';
import 'package:motorcycle_dash/services/location_service.dart';

class _MockLocationService extends LocationService {
  bool _mockGranted = false;

  void grant() {
    _mockGranted = true;
  }

  void revoke() {
    _mockGranted = false;
  }

  @override
  Future<bool> hasPermissions() async => _mockGranted;
}

void main() {
  TestWidgetsFlutterBinding.ensureInitialized();

  testWidgets(
    'DashboardAlertRegion automatically clears location banner when app resumes with granted permission',
    (tester) async {
      final mockService = _MockLocationService();
      addTearDown(() => mockService.dispose());
      // Initially permissions are denied (system dialog is showing)
      mockService.revoke();

      await tester.pumpWidget(
        ProviderScope(
          overrides: [
            locationServiceProvider.overrideWithValue(mockService),
          ],
          child: const MaterialApp(
            home: Scaffold(
              body: DashboardAlertRegion(),
            ),
          ),
        ),
      );

      await tester.pumpAndSettle();

      // Banner should be visible initially
      expect(
        find.text('Location permission needed for GPS speedometer.'),
        findsOneWidget,
      );

      // User grants permission in system dialog
      mockService.grant();

      // System dialog closes -> Flutter engine receives AppLifecycleState.resumed
      tester.binding.handleAppLifecycleStateChanged(AppLifecycleState.resumed);
      await tester.pumpAndSettle();

      // The banner must automatically dismiss WITHOUT tapping Enable or restarting the app!
      expect(
        find.text('Location permission needed for GPS speedometer.'),
        findsNothing,
      );

      mockService.dispose();
    },
  );
}