import 'package:flutter_test/flutter_test.dart';
import 'package:motorcycle_dash/models/telemetry_sample.dart';
import 'package:motorcycle_dash/services/validation/telemetry_validator.dart';

void main() {
  group('Phase 8: Deterministic Telemetry Dataset Tests', () {
    test('Left and Right lean produces opposite signs consistently', () {
      final leftCornerSample = TelemetrySample(
        timestamp: DateTime.now(),
        speed: 42.0,
        leanAngle: -34.5, // Left lean convention is negative
        lateralG: -0.68,
      );

      final rightCornerSample = TelemetrySample(
        timestamp: DateTime.now(),
        speed: 42.0,
        leanAngle: 31.2, // Right lean convention is positive
        lateralG: 0.62,
      );

      expect(leftCornerSample.leanAngle!, isNegative);
      expect(rightCornerSample.leanAngle!, isPositive);
    });

    test('Straight-line hard acceleration maintains near-zero lean angle', () {
      final hardLaunchSamples = List.generate(20, (i) {
        return TelemetrySample(
          timestamp: DateTime(2026, 8, 28, 12, 0, 0).add(Duration(milliseconds: i * 50)),
          speed: 10.0 + (i * 1.2), // 10 -> 34 MPH launch in 1.0s (~1.1g)
          longitudinalG: 0.95,     // Hard 0.95g launch
          lateralG: 0.01,
          leanAngle: 0.2,          // Near-zero lean
        );
      });

      final validator = TelemetryValidator();
      for (final sample in hardLaunchSamples) {
        final quality = validator.validate(sample);
        expect(quality.isValid, isTrue);
        expect(sample.leanAngle!.abs(), lessThan(1.5));
      }
    });

    test('Timestamp gaps (>300ms) are accurately detected and tallied', () {
      final validator = TelemetryValidator();
      final t0 = DateTime(2026, 8, 28, 10, 0, 0);

      validator.validate(TelemetrySample(timestamp: t0, speed: 30.0));
      validator.validate(TelemetrySample(timestamp: t0.add(const Duration(milliseconds: 50)), speed: 30.0));
      // 500ms gap
      validator.validate(TelemetrySample(timestamp: t0.add(const Duration(milliseconds: 550)), speed: 30.0));
      // 50ms interval
      validator.validate(TelemetrySample(timestamp: t0.add(const Duration(milliseconds: 600)), speed: 30.0));
      // 2500ms large gap
      final suspectSample = validator.validate(TelemetrySample(timestamp: t0.add(const Duration(milliseconds: 3100)), speed: 30.0));

      expect(validator.timestampGapCount, equals(2));
      expect(suspectSample.isSuspect, isTrue);
      expect(suspectSample.reasons.any((r) => r.contains('Large telemetry gap')), isTrue);
    });
  });
}