// lib/services/session_manager.dart
import 'package:flutter/material.dart';
import 'package:shared_preferences/shared_preferences.dart';

class SessionManager extends ChangeNotifier {
  final SharedPreferences _prefs;
  String? _userId;
  String? _session;

  SessionManager(this._prefs);

  String? get userId => _userId;
  String? get session => _session;
  bool get isLoggedIn => _userId != null && _session != null;

  void setSession(String userId, String session) {
    _userId = userId;
    _session = session;
    _prefs.setString('userId', userId);
    _prefs.setString('session', session);
    notifyListeners();
  }

  Future<void> loadSession() async {
    _userId = _prefs.getString('userId');
    _session = _prefs.getString('session');
    notifyListeners();
  }

  void clear() {
    _userId = null;
    _session = null;
    _prefs.remove('userId');
    _prefs.remove('session');
    notifyListeners();
  }

  Map<String, String> get authHeaders {
    return {
      'X-User-ID': _userId ?? '',
      'X-Session': _session ?? '',
    };
  }
}