import 'package:shared_preferences/shared_preferences.dart';

/// Stores a simple read-only guest mode flag per trip.
class GuestFlagService {
  /// Returns whether guest mode is enabled for [tripId].
  Future<bool> isGuestEnabled(String tripId) async {
    final prefs = await SharedPreferences.getInstance();
    return prefs.getBool(_key(tripId)) ?? false;
  }

  /// Sets guest mode flag for [tripId].
  Future<void> setGuestEnabled(String tripId, bool enabled) async {
    final prefs = await SharedPreferences.getInstance();
    await prefs.setBool(_key(tripId), enabled);
  }

  String _key(String tripId) => 'guest_$tripId';
}