import 'package:shared_preferences/shared_preferences.dart';

import 'models.dart';

class AppStorage {
  static const _hostsKey = 'remote_hosts_v1';
  static const _localeKey = 'locale';
  static const _widthKey = 'desktop_width';
  static const _heightKey = 'desktop_height';
  static const _fpsKey = 'desktop_fps';

  Future<List<RemoteHost>> loadHosts() async {
    final preferences = await SharedPreferences.getInstance();
    final encoded = preferences.getString(_hostsKey);
    if (encoded == null) return const [];
    try {
      return RemoteHost.decodeList(encoded);
    } on Object {
      return const [];
    }
  }

  Future<void> saveHosts(List<RemoteHost> hosts) async {
    final preferences = await SharedPreferences.getInstance();
    await preferences.setString(_hostsKey, RemoteHost.encodeList(hosts));
  }

  Future<AppSettings> loadSettings() async {
    final preferences = await SharedPreferences.getInstance();
    return AppSettings(
      languageCode: preferences.getString(_localeKey),
      maxWidth: preferences.getInt(_widthKey) ?? 1280,
      maxHeight: preferences.getInt(_heightKey) ?? 720,
      framesPerSecond: preferences.getInt(_fpsKey) ?? 15,
    );
  }

  Future<void> saveSettings(AppSettings settings) async {
    final preferences = await SharedPreferences.getInstance();
    if (settings.languageCode == null) {
      await preferences.remove(_localeKey);
    } else {
      await preferences.setString(_localeKey, settings.languageCode!);
    }
    await preferences.setInt(_widthKey, settings.maxWidth);
    await preferences.setInt(_heightKey, settings.maxHeight);
    await preferences.setInt(_fpsKey, settings.framesPerSecond);
  }
}