import 'package:flutter/foundation.dart';
import 'package:shared_preferences/shared_preferences.dart';

class S {
  static const _languagePreferenceKey = 'is_english';
  static final ValueNotifier<bool> langNotifier = ValueNotifier<bool>(false);

  static bool get isEn => langNotifier.value;
  static set isEn(bool value) => langNotifier.value = value;

  static Future<void> loadLanguagePreference() async {
    try {
      final preferences = await SharedPreferences.getInstance();
      isEn = preferences.getBool(_languagePreferenceKey) ?? false;
    } catch (error) {
      debugPrint('Failed to load language preference: $error');
      isEn = false;
    }
  }

  static Future<void> setLanguagePreference(bool value) async {
    isEn = value;
    try {
      final preferences = await SharedPreferences.getInstance();
      await preferences.setBool(_languagePreferenceKey, value);
    } catch (error) {
      debugPrint('Failed to save language preference: $error');
    }
  }

  // App Title
  static String get title => isEn ? 'Demo' : '示例';

  // Tabs
  static String get tabInit => isEn ? 'Login' : '登录';
  static String get tabScan => isEn ? 'Scan' : '设备扫描';
  static String get tabLock => isEn ? 'Lock' : '蓝牙控锁';
  static String get tabWifi => isEn ? 'WiFi' : 'WiFi配网';
  static String get tabTalk => isEn ? 'Talk' : '视频对讲';

  // Common Logs & Buttons
  static String get logFailed => isEn ? 'Failed' : '失败';
  static String get logSuccess => isEn ? 'Success' : '成功';
  static String get btnProcessing => isEn ? 'Processing...' : '处理中...';

  // Auth Tab
  static String get sdkStatus => isEn ? 'SDK Status' : 'SDK 状态';
  static String get cloudUserStatus => isEn ? 'Signed-in Account' : '登录账户';
  static String get clientId => isEn ? 'Client ID *' : '客户ID *';
  static String get clientSecret => isEn ? 'Client Secret' : '客户端密钥';
  static String get envUrl => isEn ? 'Env URL' : '环境地址';
  static String get step1Init => isEn
      ? 'Step 1: Register a cloud account to get client_id and client_secret, then initialize the SDK'
      : '第1步：注册星云账号填写后初始化SDK';
  static String get step2User => isEn ? 'Step 2: Sign In' : '第 2 步：登录账号';
  static String get btnCreateTestCloudAccount => isEn
      ? 'Step 2: Create a new SDK cloud account (testing only)'
      : '第2步：仅测试创建新的 SDK 星云账户';
  static String get btnLoginForWifiAuthorization => isEn
      ? 'Step 3: Sign in with the app account for WiFi authorization'
      : '第3步：填写 app 登录账号，支持 WIFI 授权账号';
  static String get accountLabel => isEn ? 'Account' : '账号';
  static String get passwordLabel => isEn ? 'Password' : '密码';
  static String get logFillId =>
      isEn ? 'Please fill Client ID' : '请先填写 Client ID';
  static String get logInitSuccess => isEn ? 'SDK Initialized' : 'SDK 初始化成功';
  static String get logUserReady => isEn ? 'Account ready' : '账号登录成功';

  // Scan Tab
  static String get btnScan => isEn ? 'Scan' : '扫描';
  static String get btnScanning => isEn ? 'Scanning...' : '扫描中...';
  static String get btnStop => isEn ? 'Stop' : '停止';
  static String get scanHint => isEn ? 'Tap "Scan" to start' : '点击"扫描设备"开始';
  static String get pairedStatus => isEn ? 'Paired' : '已配对';
  static String get btnPair => isEn ? 'Pair' : '配对';
  static String get logScanning =>
      isEn ? 'Scanning (10s)...' : '开始扫描（10 秒超时）...';
  static String get logScanDone => isEn ? 'Scan done' : '扫描完成';

  // Lock Tab
  static String get lockIdLabel => isEn ? 'Lock ID' : '锁定ID';
  static String get notPaired => isEn ? 'Not Paired' : '未配对';
  static String get btnOpen => isEn ? 'Open' : '开锁';
  static String get btnClose => isEn ? 'Close' : '关锁';

  // WiFi Tab
  static String get wifiTitle => isEn ? 'WiFi Config' : 'WiFi配网';
  static String get wifiModeDirect =>
      isEn ? 'Direct Mode (Lock Board)' : '锁板直连模式';
  static String get wifiModeGateway => isEn ? 'Gateway Mode' : '网关模式';
  static String get wifiConfigSec => isEn ? 'WiFi Settings' : 'WiFi 配置';
  static String get btnStartConfig =>
      isEn ? 'Step 2: WiFi Setup' : '第2步：wifi配网';
  static String get logConfigSent => isEn ? 'Config Sent' : '指令已发送';
  static String get currentLoggedInAccountPrefix =>
      isEn ? 'Current signed-in account: ' : '当前登录账号：';
  static String get wifiUsesAuthorizedSession => isEn
      ? 'WiFi setup will use this account\'s authorized session.'
      : 'WIFI 配网将使用此账号的授权会话。';
  static String get logConfigCancelledNeedTalkInitialization => isEn
      ? 'WiFi setup cancelled: Please tap “Step 1: Initialize Video Talk” on this page first.'
      : '已取消配网：请先点击本页“第1步：初始化视频对讲”。';
  static String get logUsingLoginSessionForGatewayConfig => isEn
      ? 'Using the signed-in session to get the gateway configuration and send it via BLE...'
      : '已使用登录会话，正在获取网关配置并通过 BLE 下发...';
  static String get logWifiConfigCompleted => isEn
      ? 'SUCCESS: BLE WiFi provisioning and deviceNetwork/setting are complete.'
      : 'SUCCESS: BLE 配网及 deviceNetwork/setting 均已完成。';

  // Talk Tab
  static String get talkServer => isEn ? 'Server Address' : '服务器地址';
  static String get btnInitTalk =>
      isEn ? 'Step 1: Initialize Video Talk' : '第1步：初始化视频对讲';
  static String get initialized => isEn ? 'Initialized' : '已初始化';
  static String get completeWifiTalkInitialization => isEn
      ? 'Please complete Step 1: Initialize Video Talk on the WiFi Setup tab.'
      : '请先在“WiFi配网”页完成第1步：初始化视频对讲。';
  static String get incomingCall => isEn ? 'Incoming Call' : '来电';
  static String get btnAccept => isEn ? 'Accept' : '接听';
  static String get btnReject => isEn ? 'Reject' : '拒绝';
  static String get btnHangup => isEn ? 'Hang up' : '挂断';
  static String get btnMonitor => isEn ? 'Monitor' : '监控';
  static String get logTalkReady => isEn ? 'Talk Ready' : '视频对讲就绪';
  static String get deviceIdLabel => isEn ? 'Device ID' : '设备ID';
}