import 'package:flutter_test/flutter_test.dart';
import 'package:motorcycle_dash/services/map/map_provider_interface.dart';
import 'package:motorcycle_dash/services/navigation/navigation_session_service.dart';
import 'package:motorcycle_dash/services/routes/route_models.dart';
import 'package:motorcycle_dash/services/routes/route_provider.dart';

void main() {
  group('NavigationSessionNotifier Tests', () {
    test('initial state is idle and empty', () {
      final notifier = NavigationSessionNotifier();
      expect(notifier.state.status, equals(NavigationStatus.idle));
      expect(notifier.state.isNavigating, isFalse);
      expect(notifier.state.hasActiveRoute, isFalse);
      expect(notifier.state.maneuvers, isEmpty);
    });

    test('startNavigation initiates turn-by-turn guidance', () async {
      final notifier = NavigationSessionNotifier();
      final maneuvers = [
        const RouteManeuver(
          index: 0,
          instruction: 'Head north on Peachtree St',
          type: ManeuverType.depart,
          distanceMeters: 500.0,
          durationSeconds: 60,
          streetName: 'Peachtree St',
          location: AppLatLng(33.750, -84.388),
        ),
        const RouteManeuver(
          index: 1,
          instruction: 'Turn right on 10th St',
          type: ManeuverType.turnRight,
          distanceMeters: 1000.0,
          durationSeconds: 120,
          streetName: '10th St',
          location: AppLatLng(33.780, -84.385),
        ),
        const RouteManeuver(
          index: 2,
          instruction: 'Arrive at Piedmont Park',
          type: ManeuverType.arrive,
          distanceMeters: 0.0,
          durationSeconds: 0,
          streetName: 'Piedmont Park',
          location: AppLatLng(33.790, -84.370),
        ),
      ];

      final calcResult = RouteCalculationResult(
        straightLineDistanceMeters: 1500.0,
        estimatedDistanceMeters: 1500.0,
        estimatedDurationSeconds: 180,
        geometry: const [
          AppLatLng(33.750, -84.388),
          AppLatLng(33.780, -84.385),
          AppLatLng(33.790, -84.370),
        ],
        isStraightLine: false,
        providerName: 'AWS Location',
        maneuvers: maneuvers,
      );

      await notifier.startNavigation(
        calculationResult: calcResult,
        destination: const ResolvedPlace(
          providerId: 'dest_1',
          displayName: 'Piedmont Park',
          latitude: 33.790,
          longitude: -84.370,
        ),
      );

      expect(notifier.state.isNavigating, isTrue);
      expect(notifier.state.status, equals(NavigationStatus.navigating));
      expect(notifier.state.maneuvers.length, equals(3));
      expect(notifier.state.currentManeuverIndex, equals(0));
      expect(notifier.state.currentManeuver?.instruction, equals('Head north on Peachtree St'));
      expect(notifier.state.nextManeuver?.instruction, equals('Turn right on 10th St'));
      expect(notifier.state.remainingDistanceMeters, equals(1500.0));
      expect(notifier.state.remainingDurationSeconds, equals(180));
    });

    test('updateLocation advances maneuvers when rider approaches waypoint', () async {
      final notifier = NavigationSessionNotifier();
      final maneuvers = [
        const RouteManeuver(
          index: 0,
          instruction: 'Head north on Main',
          type: ManeuverType.depart,
          distanceMeters: 200.0,
          durationSeconds: 30,
          location: AppLatLng(33.7500, -84.3880),
        ),
        const RouteManeuver(
          index: 1,
          instruction: 'Turn left on Elm',
          type: ManeuverType.turnLeft,
          distanceMeters: 800.0,
          durationSeconds: 90,
          location: AppLatLng(33.7518, -84.3880), // ~200m north
        ),
        const RouteManeuver(
          index: 2,
          instruction: 'Arrive at destination',
          type: ManeuverType.arrive,
          distanceMeters: 0.0,
          durationSeconds: 0,
          location: AppLatLng(33.7518, -84.3960),
        ),
      ];

      final calcResult = RouteCalculationResult(
        straightLineDistanceMeters: 1000.0,
        estimatedDistanceMeters: 1000.0,
        estimatedDurationSeconds: 120,
        geometry: const [
          AppLatLng(33.7500, -84.3880),
          AppLatLng(33.7518, -84.3880),
          AppLatLng(33.7518, -84.3960),
        ],
        isStraightLine: false,
        providerName: 'AWS Location',
        maneuvers: maneuvers,
      );

      await notifier.startNavigation(calculationResult: calcResult);

      // Rider is approaching starting waypoint (approx 100m south)
      notifier.updateLocation(const AppLatLng(33.7490, -84.3880), speedMph: 25.0);
      expect(notifier.state.currentManeuverIndex, equals(0));

      // Rider reaches within 10 meters of maneuver 0 point
      notifier.updateLocation(const AppLatLng(33.7500, -84.3880), speedMph: 25.0);
      expect(notifier.state.currentManeuverIndex, equals(1));
      expect(notifier.state.currentManeuver?.instruction, equals('Turn left on Elm'));

      // Pause and resume
      notifier.pauseNavigation();
      expect(notifier.state.status, equals(NavigationStatus.paused));
      expect(notifier.state.isNavigating, isFalse);

      notifier.resumeNavigation();
      expect(notifier.state.status, equals(NavigationStatus.navigating));

      // Stop navigation
      await notifier.stopNavigation();
      expect(notifier.state.status, equals(NavigationStatus.idle));
      expect(notifier.state.hasActiveRoute, isFalse);
    });

    test('toggleTts toggles voice guidance', () {
      final notifier = NavigationSessionNotifier();
      expect(notifier.state.ttsEnabled, isTrue);
      notifier.toggleTts();
      expect(notifier.state.ttsEnabled, isFalse);
      notifier.toggleTts();
      expect(notifier.state.ttsEnabled, isTrue);
    });
  });
}