import 'dart:convert';
import 'package:hive/hive.dart';
import 'package:shared_preferences/shared_preferences.dart';
import '../models/user.dart';

class StorageService {
  static final StorageService _instance = StorageService._internal();
  factory StorageService() => _instance;
  StorageService._internal();

  Box? _box;
  SharedPreferences? _prefs;

  Future<void> init() async {
    _box = Hive.box('zhinianBox');
    _prefs = await SharedPreferences.getInstance();
  }

  Future<void> saveUser(User user) async {
    await _box?.put('user', jsonEncode(user.toJson()));
  }

  User? getUser() {
    final data = _box?.get('user');
    if (data == null) return null;
    try {
      return User.fromJson(jsonDecode(data));
    } catch (_) {
      return null;
    }
  }

  Future<void> clearUser() async {
    await _box?.delete('user');
  }

  Future<void> setString(String key, String value) async {
    await _prefs?.setString(key, value);
  }

  String? getString(String key) {
    return _prefs?.getString(key);
  }

  Future<void> setBool(String key, bool value) async {
    await _prefs?.setBool(key, value);
  }

  bool? getBool(String key) {
    return _prefs?.getBool(key);
  }

  Future<void> remove(String key) async {
    await _prefs?.remove(key);
  }
}

final storageService = StorageService();