import 'package:flutter_test/flutter_test.dart';
import 'package:shared_preferences/shared_preferences.dart';
import 'package:motorcycle_dash/services/map/map_providers.dart';

void main() {
  TestWidgetsFlutterBinding.ensureInitialized();

  group('Map Smoothness & Orientation Angle Normalization (#79 & #80)', () {
    test('shortestAngleDiff correctly calculates minimal circular angular distance', () {
      // Direct small adjustments
      expect(shortestAngleDiff(10.0, 20.0), closeTo(10.0, 0.001));
      expect(shortestAngleDiff(20.0, 10.0), closeTo(-10.0, 0.001));

      // Circular transition crossing 0° / 360°
      // Moving from 359° to 1° should be +2° clockwise, NOT -358° counter-clockwise
      expect(shortestAngleDiff(359.0, 1.0), closeTo(2.0, 0.001));

      // Moving from 1° to 359° should be -2° counter-clockwise, NOT +358° clockwise
      expect(shortestAngleDiff(1.0, 359.0), closeTo(-2.0, 0.001));

      // 350° to 10° should be +20°
      expect(shortestAngleDiff(350.0, 10.0), closeTo(20.0, 0.001));

      // 10° to 350° should be -20°
      expect(shortestAngleDiff(10.0, 350.0), closeTo(-20.0, 0.001));

      // Half-circle
      expect(shortestAngleDiff(0.0, 180.0).abs(), closeTo(180.0, 0.001));
    });

    test('normalizeAngle correctly constrains values to [0.0, 360.0)', () {
      expect(normalizeAngle(0.0), closeTo(0.0, 0.001));
      expect(normalizeAngle(360.0), closeTo(0.0, 0.001));
      expect(normalizeAngle(365.0), closeTo(5.0, 0.001));
      expect(normalizeAngle(-10.0), closeTo(350.0, 0.001));
      expect(normalizeAngle(-370.0), closeTo(350.0, 0.001));
      expect(normalizeAngle(720.0), closeTo(0.0, 0.001));
    });
  });

  group('MapOrientation State & Persistence (#80)', () {
    setUp(() {
      SharedPreferences.setMockInitialValues({});
    });

    test('MapOrientationNotifier toggles and persists orientation', () async {
      final notifier = MapOrientationNotifier();
      expect(notifier.state, MapOrientation.northUp);

      await notifier.toggle();
      expect(notifier.state, MapOrientation.headingUp);

      await notifier.toggle();
      expect(notifier.state, MapOrientation.northUp);

      await notifier.setOrientation(MapOrientation.headingUp);
      expect(notifier.state, MapOrientation.headingUp);

      final prefs = await SharedPreferences.getInstance();
      expect(prefs.getString('selected_map_orientation'), 'headingUp');
    });
  });
}