sinoMedCloud/lib/core/storage/local_storage.dart

import 'package:shared_preferences/shared_preferences.dart';
import 'package:sino_med_cloud/core/constants/app_constants.dart';

/// 本地存储管理类
class LocalStorage {
  static SharedPreferences? _prefs;

  /// 初始化本地存储
  static Future<void> init() async {
    _prefs ??= await SharedPreferences.getInstance();
  }

  /// 获取 SharedPreferences 实例
  static SharedPreferences get prefs {
    if (_prefs == null) {
      throw Exception('LocalStorage not initialized. Call LocalStorage.init() first.');
    }
    return _prefs!;
  }

  // ==================== String 操作 ====================

  /// 保存字符串
  static Future<bool> setString(String key, String value) async {
    return await prefs.setString(key, value);
  }

  /// 获取字符串
  static String? getString(String key, {String? defaultValue}) {
    return prefs.getString(key) ?? defaultValue;
  }

  // ==================== Int 操作 ====================

  /// 保存整数
  static Future<bool> setInt(String key, int value) async {
    return await prefs.setInt(key, value);
  }

  /// 获取整数
  static int? getInt(String key, {int? defaultValue}) {
    return prefs.getInt(key) ?? defaultValue;
  }

  // ==================== Double 操作 ====================

  /// 保存浮点数
  static Future<bool> setDouble(String key, double value) async {
    return await prefs.setDouble(key, value);
  }

  /// 获取浮点数
  static double? getDouble(String key, {double? defaultValue}) {
    return prefs.getDouble(key) ?? defaultValue;
  }

  // ==================== Bool 操作 ====================

  /// 保存布尔值
  static Future<bool> setBool(String key, bool value) async {
    return await prefs.setBool(key, value);
  }

  /// 获取布尔值
  static bool? getBool(String key, {bool? defaultValue}) {
    return prefs.getBool(key) ?? defaultValue;
  }

  // ==================== StringList 操作 ====================

  /// 保存字符串列表
  static Future<bool> setStringList(String key, List<String> value) async {
    return await prefs.setStringList(key, value);
  }

  /// 获取字符串列表
  static List<String>? getStringList(String key) {
    return prefs.getStringList(key);
  }

  // ==================== 通用操作 ====================

  /// 删除指定 key
  static Future<bool> remove(String key) async {
    return await prefs.remove(key);
  }

  /// 清空所有数据
  static Future<bool> clear() async {
    return await prefs.clear();
  }

  /// 检查 key 是否存在
  static bool containsKey(String key) {
    return prefs.containsKey(key);
  }

  /// 获取所有 key
  static Set<String> getKeys() {
    return prefs.getKeys();
  }

  // ==================== 常用业务方法 ====================

  /// 保存 Token
  static Future<bool> saveToken(String token) async {
    return await setString(AppConstants.keyToken, token);
  }

  /// 获取 Token
  static String? getToken() {
    return getString(AppConstants.keyToken);
  }

  /// 删除 Token
  static Future<bool> removeToken() async {
    return await remove(AppConstants.keyToken);
  }

  /// 保存用户信息（JSON 字符串）
  static Future<bool> saveUserInfo(String userInfo) async {
    return await setString(AppConstants.keyUserInfo, userInfo);
  }

  /// 获取用户信息
  static String? getUserInfo() {
    return getString(AppConstants.keyUserInfo);
  }

  /// 删除用户信息
  static Future<bool> removeUserInfo() async {
    return await remove(AppConstants.keyUserInfo);
  }
}