import 'package:flutter_test/flutter_test.dart';
import 'package:shared_preferences/shared_preferences.dart';
import 'package:motorcycle_dash/models/telemetry_sample.dart';
import 'package:motorcycle_dash/services/validation/telemetry_validator.dart';
import 'package:motorcycle_dash/services/calibration_service.dart';
import 'package:motorcycle_dash/features/records/records_service.dart';

void main() {
  TestWidgetsFlutterBinding.ensureInitialized();

  group('Phase 8: Telemetry Validator Tests', () {
    late TelemetryValidator validator;

    setUp(() {
      validator = TelemetryValidator();
    });

    test('Valid cruising sample passes with high confidence', () {
      final now = DateTime.now();
      final sample = TelemetrySample(
        timestamp: now,
        latitude: 37.7749,
        longitude: -122.4194,
        speed: 65.0,
        gpsAccuracy: 3.5,
        leanAngle: 12.0,
        pitchAngle: 0.5,
        accelX: 0.2,
        accelY: 0.1,
        accelZ: 9.8,
        longitudinalG: 0.02,
        lateralG: 0.21,
      );

      final quality = validator.validate(sample);

      expect(quality.isValid, isTrue);
      expect(quality.status, equals(ValidationStatus.valid));
      expect(quality.reasons, isEmpty);
      expect(quality.gpsConfidence, equals(1.0));
      expect(quality.overallConfidence, greaterThanOrEqualTo(0.90));
      expect(quality.isStationary, isFalse);
    });

    test('Stationary vehicle correctly marked with stationary flag', () {
      final sample = TelemetrySample(
        timestamp: DateTime.now(),
        speed: 0.0,
        gpsAccuracy: 4.0,
        leanAngle: 0.0,
        longitudinalG: 0.0,
        lateralG: 0.0,
      );

      final quality = validator.validate(sample);

      expect(quality.isValid, isTrue);
      expect(quality.isStationary, isTrue);
      expect(quality.isAccelerating, isFalse);
      expect(quality.isBraking, isFalse);
    });

    test('Impossible speed jump > 220 MPH is rejected with reason', () {
      final sample = TelemetrySample(
        timestamp: DateTime.now(),
        speed: 345.0,
        gpsAccuracy: 10.0,
      );

      final quality = validator.validate(sample);

      expect(quality.isRejected, isTrue);
      expect(quality.status, equals(ValidationStatus.rejected));
      expect(quality.reasons.any((r) => r.contains('Impossible vehicle speed')), isTrue);
      expect(quality.speedConfidence, equals(0.0));
      expect(validator.rejectedCount, equals(1));
    });

    test('NaN numeric values are rejected immediately', () {
      final sample = TelemetrySample(
        timestamp: DateTime.now(),
        speed: double.nan,
        latitude: 37.77,
      );

      final quality = validator.validate(sample);

      expect(quality.isRejected, isTrue);
      expect(quality.overallConfidence, equals(0.0));
      expect(quality.reasons.any((r) => r.contains('NaN or Infinity')), isTrue);
    });

    test('Degraded GPS accuracy reduces confidence and marks sample suspect', () {
      final sample = TelemetrySample(
        timestamp: DateTime.now(),
        speed: 45.0,
        gpsAccuracy: 48.0, // poor GPS lock
      );

      final quality = validator.validate(sample);

      expect(quality.isSuspect, isTrue);
      expect(quality.gpsConfidence, lessThan(0.50));
      expect(quality.reasons.any((r) => r.contains('Poor GPS accuracy')), isTrue);
      expect(validator.suspectCount, equals(1));
    });

    test('Extreme roll rate (>180 deg/sec) flags suspect lean', () {
      final t0 = DateTime.now();
      validator.validate(TelemetrySample(
        timestamp: t0,
        speed: 50.0,
        leanAngle: 0.0,
      ));

      // 50ms later, jump from 0 deg to 30 deg lean (600 deg/sec impossible flick)
      final quality = validator.validate(TelemetrySample(
        timestamp: t0.add(const Duration(milliseconds: 50)),
        speed: 50.0,
        leanAngle: 30.0,
      ));

      expect(quality.isSuspect, isTrue);
      expect(quality.reasons.any((r) => r.contains('Excessive roll rate')), isTrue);
    });
  });

  group('Phase 8: Motorcycle-Specific Calibration Tests', () {
    test('Motorcycle A and Motorcycle B have isolated calibration offsets', () async {
      SharedPreferences.setMockInitialValues({});
      final calibrationService = CalibrationService();

      // Calibrate Bike 1 (e.g. Yamaha R6 in portrait mount)
      await calibrationService.saveCalibrationOffsets(2.5, -1.2, motorcycleId: 1);

      // Calibrate Bike 2 (e.g. BMW GS in landscape mount)
      await calibrationService.saveCalibrationOffsets(-4.0, 3.8, motorcycleId: 2);

      // Load Bike 1
      final bike1Offsets = await calibrationService.loadCalibrationOffsets(motorcycleId: 1);
      expect(bike1Offsets['pitch'], equals(2.5));
      expect(bike1Offsets['roll'], equals(-1.2));

      // Load Bike 2
      final bike2Offsets = await calibrationService.loadCalibrationOffsets(motorcycleId: 2);
      expect(bike2Offsets['pitch'], equals(-4.0));
      expect(bike2Offsets['roll'], equals(3.8));
    });
  });

  group('Phase 8: Personal Record Integrity Tests', () {
    test('GPS multipath glitch is rejected by confidence and sanity limits', () async {
      SharedPreferences.setMockInitialValues({});
      final prefs = await SharedPreferences.getInstance();
      final recordsService = RecordsService(prefs);

      // Legitimate record
      await recordsService.checkAndSaveRecords(
        const PersonalRecords(topSpeedMph: 112.0),
        null,
        confidence: 0.95,
      );
      expect(recordsService.state.topSpeedMph, equals(112.0));

      // Glitched GPS spike with low confidence is discarded
      await recordsService.checkAndSaveRecords(
        const PersonalRecords(topSpeedMph: 185.0),
        null,
        confidence: 0.40, // low confidence
      );
      expect(recordsService.state.topSpeedMph, equals(112.0));

      // Impossible speed > 220 is discarded even if confidence claimed high
      await recordsService.checkAndSaveRecords(
        const PersonalRecords(topSpeedMph: 350.0),
        null,
        confidence: 1.0,
      );
      expect(recordsService.state.topSpeedMph, equals(112.0));
    });
  });
}