import 'package:flutter_test/flutter_test.dart';
import 'package:tactical_app/models/angle_unit.dart';
import 'package:tactical_app/services/camera_sensor_calibration_service.dart';

void main() {
  TestWidgetsFlutterBinding.ensureInitialized();

  group('CameraSensorCalibrationService Tests', () {
    test('Standard target library contains realistic heights', () {
      final targets = CameraSensorCalibrationService.standardTargets;
      expect(targets.isNotEmpty, isTrue);

      final infantry = targets.firstWhere((t) => t.id == 'infantry');
      expect(infantry.heightMeters, equals(1.75));

      final minaretShort = targets.firstWhere((t) => t.id == 'minaret_neighborhood');
      expect(minaretShort.heightMeters, equals(16.0));

      final minaretGrand = targets.firstWhere((t) => t.id == 'minaret_grand');
      expect(minaretGrand.heightMeters, equals(24.0));
    });

    test('Stadiametric rangefinding calculation at 1.0x zoom', () {
      // Tank (2.7m height), 100 pixels on 1000px screen height
      final distance = CameraSensorCalibrationService.calculateStadiametricDistance(
        targetRealHeightMeters: 2.70,
        reticulePixelHeight: 100.0,
        screenHeightPixels: 1000.0,
        zoomMultiplier: 1.0,
      );

      // Distance should be positive and physically proportional
      expect(distance, greaterThan(20.0));
      expect(distance, lessThan(100.0));
    });

    test('Zoom multiplier scales distance proportionally', () {
      final dist1x = CameraSensorCalibrationService.calculateStadiametricDistance(
        targetRealHeightMeters: 2.70,
        reticulePixelHeight: 100.0,
        screenHeightPixels: 1000.0,
        zoomMultiplier: 1.0,
      );

      final dist3x = CameraSensorCalibrationService.calculateStadiametricDistance(
        targetRealHeightMeters: 2.70,
        reticulePixelHeight: 100.0,
        screenHeightPixels: 1000.0,
        zoomMultiplier: 3.0,
      );

      expect((dist3x / dist1x), closeTo(3.0, 0.001));
    });

    test('Incline distance calculation from pitch angle', () {
      // 10m flagpole observed at 45° elevation
      final res = CameraSensorCalibrationService.calculateInclineDistance(
        targetRealHeightMeters: 10.0,
        pitchDegrees: 45.0,
      );

      expect(res['groundDistance']!, closeTo(10.0, 0.1));
      expect(res['slantRange']!, closeTo(14.14, 0.2));
    });

    test('AngleFormatter uses "الاتجاه" instead of "السمت"', () {
      final headingStr = AngleFormatter.format(45.0, AngleUnit.degrees);
      expect(headingStr, contains('الاتجاه'));
      expect(headingStr, isNot(contains('السمت')));

      final milsStr = AngleFormatter.format(45.0, AngleUnit.mils);
      expect(milsStr, contains('الاتجاه'));
      expect(milsStr, isNot(contains('السمت')));
    });
  });
}