import 'dart:async';
import 'package:flutter/material.dart';
import 'package:flutter_test/flutter_test.dart';
import 'package:flutter_riverpod/flutter_riverpod.dart';
import 'package:motorcycle_dash/core/theme/theme.dart';
import 'package:motorcycle_dash/features/dashboard/dashboard_screen.dart';
import 'package:motorcycle_dash/features/dashboard/widgets/g_force_indicator.dart';
import 'package:motorcycle_dash/features/dashboard/widgets/gps_status_indicator.dart';
import 'package:motorcycle_dash/features/dashboard/widgets/heading_indicator.dart';
import 'package:motorcycle_dash/features/dashboard/widgets/lean_angle_indicator.dart';
import 'package:motorcycle_dash/features/dashboard/widgets/performance_summary.dart';
import 'package:motorcycle_dash/features/dashboard/widgets/responsive_dashboard_layout.dart';
import 'package:motorcycle_dash/features/dashboard/widgets/ride_action_button.dart';
import 'package:motorcycle_dash/features/dashboard/widgets/ride_status_chip.dart';
import 'package:motorcycle_dash/features/dashboard/widgets/speed_readout.dart';
import 'package:motorcycle_dash/features/records/records_service.dart';
import 'package:motorcycle_dash/features/rides/ride_state_machine.dart';
import 'package:motorcycle_dash/models/telemetry_sample.dart';
import 'package:motorcycle_dash/services/alerts/road_alert_models.dart';
import 'package:motorcycle_dash/services/alerts/road_alert_service.dart';
import 'package:motorcycle_dash/services/location_service.dart';
import 'package:motorcycle_dash/services/telemetry_service.dart';
import 'package:shared_preferences/shared_preferences.dart';

void main() {
  TestWidgetsFlutterBinding.ensureInitialized();
  late SharedPreferences prefs;
  late StreamController<TelemetrySample> telemetryController;
  late StreamController<List<RoadAlert>> alertsController;

  setUp(() async {
    SharedPreferences.setMockInitialValues({});
    prefs = await SharedPreferences.getInstance();
    telemetryController = StreamController<TelemetrySample>.broadcast();
    alertsController = StreamController<List<RoadAlert>>.broadcast();
  });

  tearDown(() async {
    await telemetryController.close();
    await alertsController.close();
  });

  Widget buildTestDashboard({
    RideSession? initialSession,
    List<RoadAlert>? initialAlerts,
  }) {
    return ProviderScope(
      overrides: [
        sharedPreferencesProvider.overrideWithValue(prefs),
        telemetryStreamProvider.overrideWith((ref) => telemetryController.stream),
        activeAlertsStreamProvider.overrideWith((ref) => alertsController.stream),
        dashboardAlertsStreamProvider.overrideWith((ref) => alertsController.stream),
        locationPermissionGrantedProvider.overrideWith((ref) => true),
      ],
      child: MaterialApp(
        theme: AppTheme.darkTheme,
        home: const DashboardScreen(),
      ),
    );
  }

  void configureViewport(WidgetTester tester, double width, double height) {
    tester.view.physicalSize = Size(width, height);
    tester.view.devicePixelRatio = 1.0;
  }

  group('Landscape Dashboard Redesign Matrix Tests', () {
    testWidgets('Renders adaptive 3-column composition on 840x390 landscape phone', (tester) async {
      configureViewport(tester, 840, 390);
      addTearDown(() => tester.view.resetPhysicalSize());

      await tester.pumpWidget(buildTestDashboard());
      await tester.pump();

      // Zero RenderFlex overflow
      expect(tester.takeException(), isNull);

      // Verify Left Column: G-Force indicator & statistics tiles
      expect(find.byType(GForceIndicator), findsOneWidget);
      expect(find.text('TRIP'), findsOneWidget);
      expect(find.text('TOP'), findsOneWidget);
      expect(find.text('AVG'), findsOneWidget);

      // Verify Center Column: Speedometer, Status row, Controls
      expect(find.byType(SpeedReadout), findsOneWidget);
      expect(find.byType(GPSStatusIndicator), findsOneWidget);
      expect(find.byType(HeadingIndicator), findsOneWidget);
      expect(find.byType(RideStatusChip), findsOneWidget);
      expect(find.byType(RideActionButton), findsOneWidget);
      expect(find.byType(PerformanceLaunchShortcut), findsOneWidget);

      // Verify Right Column: Lean-angle gauge & dynamics
      expect(find.byType(LeanAngleIndicator), findsOneWidget);
      expect(find.text('MOVING'), findsOneWidget);
      expect(find.text('ELEV'), findsOneWidget);
      expect(find.byType(PerformanceSummary), findsOneWidget);

      // Verify horizontal order: GForce (left) < Speed (center) < LeanAngle (right)
      final gForceCenter = tester.getCenter(find.byType(GForceIndicator));
      final speedCenter = tester.getCenter(find.byType(SpeedReadout));
      final leanCenter = tester.getCenter(find.byType(LeanAngleIndicator));

      expect(gForceCenter.dx, lessThan(speedCenter.dx));
      expect(speedCenter.dx, lessThan(leanCenter.dx));
    });

    testWidgets('Landscape alert banner is compact (<= 40dp height) and non-disruptive', (tester) async {
      configureViewport(tester, 840, 390);
      addTearDown(() => tester.view.resetPhysicalSize());

      await tester.pumpWidget(buildTestDashboard());
      await tester.pump();

      final now = DateTime.now();
      final alert = RoadAlert(
        id: 'police_ahead_1',
        providerId: 'waze_zyla',
        category: RoadAlertCategory.police,
        latitude: 34.05,
        longitude: -84.40,
        distanceFromUser: 450,
        roadName: 'GA 400 Southbound',
        description: 'Police Speed Trap',
        reportedAt: now,
        lastUpdated: now,
        source: 'Waze',
      );

      alertsController.add([alert]);
      await tester.pump(const Duration(milliseconds: 50));

      expect(tester.takeException(), isNull);
      expect(find.text('POLICE'), findsOneWidget);
      expect(find.textContaining('0.3 mi Ahead'), findsOneWidget);

      // Verify banner height is constrained to <= 40dp
      final bannerFinder = find.byWidgetPredicate(
        (widget) => widget is Container && widget.constraints?.maxHeight == 38 ||
            (widget is Container && widget.decoration is BoxDecoration && (widget.decoration as BoxDecoration).border?.bottom != null),
      );
      expect(bannerFinder, findsWidgets);

      // Speedometer remains visible and unobstructed
      expect(find.byType(SpeedReadout), findsOneWidget);
      expect(tester.getCenter(find.byType(SpeedReadout)).dy, greaterThan(60));
    });

    testWidgets('Preserves clear margin on right edge (>= 16dp) in landscape for volume overlay', (tester) async {
      configureViewport(tester, 840, 390);
      addTearDown(() => tester.view.resetPhysicalSize());

      await tester.pumpWidget(buildTestDashboard());
      await tester.pump();

      // Find the ResponsiveDashboardLayout Padding widget
      final paddingFinder = find.ancestor(
        of: find.byType(ResponsiveDashboardLayout),
        matching: find.byType(Padding),
      );
      expect(paddingFinder, findsWidgets);

      final paddingWidget = tester.firstWidget<Padding>(find.descendant(
        of: find.byType(ResponsiveDashboardLayout),
        matching: find.byType(Padding),
      ));
      final edgeInsets = paddingWidget.padding as EdgeInsets;
      expect(edgeInsets.right, greaterThanOrEqualTo(16.0));
    });
  });
}