import 'package:flutter_riverpod/flutter_riverpod.dart';
import 'package:shared_preferences/shared_preferences.dart';

final calibrationServiceProvider = Provider<CalibrationService>((ref) {
  return CalibrationService();
});

class CalibrationService {
  static const _pitchKey = 'calibration_pitch';
  static const _rollKey = 'calibration_roll';
  static const _gyroBiasXKey = 'calibration_gyro_bias_x';
  static const _gyroBiasYKey = 'calibration_gyro_bias_y';
  static const _gyroBiasZKey = 'calibration_gyro_bias_z';

  Future<void> saveCalibrationOffsets(
    double pitch,
    double roll, {
    double gyroBiasX = 0.0,
    double gyroBiasY = 0.0,
    double gyroBiasZ = 0.0,
    int? motorcycleId,
  }) async {
    final prefs = await SharedPreferences.getInstance();
    if (motorcycleId != null) {
      await prefs.setDouble('calibration_pitch_$motorcycleId', pitch);
      await prefs.setDouble('calibration_roll_$motorcycleId', roll);
      await prefs.setDouble('calibration_gyro_bias_x_$motorcycleId', gyroBiasX);
      await prefs.setDouble('calibration_gyro_bias_y_$motorcycleId', gyroBiasY);
      await prefs.setDouble('calibration_gyro_bias_z_$motorcycleId', gyroBiasZ);
    }
    // Also save global fallback
    await prefs.setDouble(_pitchKey, pitch);
    await prefs.setDouble(_rollKey, roll);
    await prefs.setDouble(_gyroBiasXKey, gyroBiasX);
    await prefs.setDouble(_gyroBiasYKey, gyroBiasY);
    await prefs.setDouble(_gyroBiasZKey, gyroBiasZ);
  }

  Future<Map<String, double>> loadCalibrationOffsets({int? motorcycleId}) async {
    final prefs = await SharedPreferences.getInstance();
    if (motorcycleId != null) {
      final bikePitch = prefs.getDouble('calibration_pitch_$motorcycleId');
      final bikeRoll = prefs.getDouble('calibration_roll_$motorcycleId');
      final bikeGbx = prefs.getDouble('calibration_gyro_bias_x_$motorcycleId') ?? 0.0;
      final bikeGby = prefs.getDouble('calibration_gyro_bias_y_$motorcycleId') ?? 0.0;
      final bikeGbz = prefs.getDouble('calibration_gyro_bias_z_$motorcycleId') ?? 0.0;
      if (bikePitch != null && bikeRoll != null) {
        return {
          'pitch': bikePitch,
          'roll': bikeRoll,
          'gyroBiasX': bikeGbx,
          'gyroBiasY': bikeGby,
          'gyroBiasZ': bikeGbz,
        };
      }
    }
    final pitch = prefs.getDouble(_pitchKey) ?? 0.0;
    final roll = prefs.getDouble(_rollKey) ?? 0.0;
    final gbx = prefs.getDouble(_gyroBiasXKey) ?? 0.0;
    final gby = prefs.getDouble(_gyroBiasYKey) ?? 0.0;
    final gbz = prefs.getDouble(_gyroBiasZKey) ?? 0.0;
    return {
      'pitch': pitch,
      'roll': roll,
      'gyroBiasX': gbx,
      'gyroBiasY': gby,
      'gyroBiasZ': gbz,
    };
  }
}