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

class AppSettings {
  final EcuType ecuType;
  final Duration pollingInterval;

  const AppSettings({
    this.ecuType = EcuType.s300,
    this.pollingInterval = const Duration(milliseconds: 50),
  });

  AppSettings copyWith({EcuType? ecuType, Duration? pollingInterval}) =>
      AppSettings(
        ecuType: ecuType ?? this.ecuType,
        pollingInterval: pollingInterval ?? this.pollingInterval,
      );
}

const _ecuTypeKey = 'ecuType';

class SettingsNotifier extends StateNotifier<AppSettings> {
  SettingsNotifier() : super(const AppSettings()) {
    _load();
  }

  Future<void> _load() async {
    final prefs = await SharedPreferences.getInstance();
    final saved = prefs.getString(_ecuTypeKey);
    if (saved == EcuType.kpro.name) {
      state = state.copyWith(ecuType: EcuType.kpro);
    }
  }

  void setEcuType(EcuType type) {
    state = state.copyWith(ecuType: type);
    SharedPreferences.getInstance()
        .then((prefs) => prefs.setString(_ecuTypeKey, type.name));
  }

  void setPollingInterval(Duration d) =>
      state = state.copyWith(pollingInterval: d);
}

final settingsProvider = StateNotifierProvider<SettingsNotifier, AppSettings>(
  (ref) => SettingsNotifier(),
);