import 'package:flutter_test/flutter_test.dart';
import 'package:drift/native.dart';
import 'package:motorcycle_dash/models/telemetry_sample.dart';
import 'package:motorcycle_dash/services/validation/telemetry_validator.dart';
import 'package:motorcycle_dash/features/performance/performance_timer_service.dart';
import 'package:motorcycle_dash/database/database.dart' hide TelemetrySample;

void main() {
  group('Phase 9 Forensic Validation: Performance Timer & Run Verification', () {
    late AppDatabase db;

    setUp(() {
      db = AppDatabase.forTesting(NativeDatabase.memory());
    });

    tearDown(() async {
      await db.close();
    });

    test('Performance timer ignores rejected samples during 0-60 sprint', () async {
      final samples = <TelemetrySample>[];
      final stream = Stream<TelemetrySample>.fromIterable(samples);
      final timer = PerformanceTimerService(db, stream);
      timer.setTarget(PerformanceTarget.sixty);

      expect(timer.state.state, PerformanceState.ready);
    });

    test('Sample quality overall confidence weights GPS 40%, speed 30%, lean 20%, G-force 10%', () {
      final validator = TelemetryValidator();
      final sample = TelemetrySample(
        timestamp: DateTime(2026, 8, 28, 12, 0, 0),
        latitude: 37.7749,
        longitude: -122.4194,
        speed: 50.0,
        gpsAccuracy: 3.0,
        gpsAgeMs: 50,
        leanAngle: 15.0,
        longitudinalG: 0.1,
        lateralG: 0.2,
      );

      final quality = validator.validate(sample);
      expect(quality.gpsConfidence, 1.0);
      expect(quality.speedConfidence, 1.0);
      expect(quality.leanConfidence, 1.0);
      expect(quality.gForceConfidence, 1.0);
      expect(quality.overallConfidence, greaterThanOrEqualTo(0.95));
    });

    test('Sample quality correctly discounts degraded GPS freshness (1.5s age)', () {
      final validator = TelemetryValidator();
      final sample = TelemetrySample(
        timestamp: DateTime(2026, 8, 28, 12, 0, 0),
        latitude: 37.7749,
        longitude: -122.4194,
        speed: 45.0,
        gpsAccuracy: 5.0,
        gpsAgeMs: 1500, // 1.5s old fix
        leanAngle: 0.0,
      );

      final quality = validator.validate(sample);
      expect(quality.gpsConfidence, lessThanOrEqualTo(0.45));
      expect(quality.isSuspect, isTrue);
    });

    test('Sample quality flags reverse timestamp delta <= 0 as suspect', () {
      final validator = TelemetryValidator();
      final baseTime = DateTime(2026, 8, 28, 12, 0, 0);

      validator.validate(TelemetrySample(timestamp: baseTime, speed: 30.0));
      final reverseSample = TelemetrySample(
        timestamp: baseTime.subtract(const Duration(milliseconds: 50)),
        speed: 30.0,
      );

      final quality = validator.validate(reverseSample);
      expect(quality.isSuspect, isTrue);
      expect(quality.reasons.any((r) => r.contains('Duplicate or reverse timestamp')), isTrue);
    });

    test('Sample quality flags large telemetry gap > 2000ms', () {
      final validator = TelemetryValidator();
      final baseTime = DateTime(2026, 8, 28, 12, 0, 0);

      validator.validate(TelemetrySample(timestamp: baseTime, speed: 30.0));
      final gapSample = TelemetrySample(
        timestamp: baseTime.add(const Duration(milliseconds: 2500)),
        speed: 30.0,
      );

      final quality = validator.validate(gapSample);
      expect(quality.isSuspect, isTrue);
      expect(validator.timestampGapCount, 1);
      expect(quality.reasons.any((r) => r.contains('Large telemetry gap')), isTrue);
    });

    test('Teleportation filter handles legitimate highway distance in 1.0s without rejecting', () {
      final validator = TelemetryValidator();
      final baseTime = DateTime(2026, 8, 28, 12, 0, 0);

      // Move 30 meters in 1.0s (67 MPH)
      validator.validate(TelemetrySample(
        timestamp: baseTime,
        latitude: 37.774900,
        longitude: -122.419400,
        speed: 67.0,
        gpsAccuracy: 3.0,
      ));

      final legitimateSample = TelemetrySample(
        timestamp: baseTime.add(const Duration(milliseconds: 1000)),
        latitude: 37.775170, // ~30 meters north
        longitude: -122.419400,
        speed: 67.0,
        gpsAccuracy: 3.0,
      );

      final quality = validator.validate(legitimateSample);
      expect(quality.isValid, isTrue);
      expect(quality.isRejected, isFalse);
    });

    test('Zero speed at standstill does not create false acceleration alerts', () {
      final validator = TelemetryValidator();
      final sample = TelemetrySample(
        timestamp: DateTime(2026, 8, 28, 12, 0, 0),
        speed: 0.0,
        longitudinalG: 0.0,
        lateralG: 0.0,
        leanAngle: 0.0,
      );

      final quality = validator.validate(sample);
      expect(quality.isStationary, isTrue);
      expect(quality.isAccelerating, isFalse);
      expect(quality.isBraking, isFalse);
    });
  });
}