import 'dart:io';

import 'package:device_info_plus/device_info_plus.dart';
import 'package:flutter/material.dart';
import 'package:flutter_sdk/starcloud_flutter_sdk.dart';
import '../global.dart';
import '../l10n.dart';
import '../widgets/common_widgets.dart';

class AuthTab extends StatefulWidget {
  const AuthTab({super.key});

  @override
  State<AuthTab> createState() => _AuthTabState();
}

class _AuthTabState extends State<AuthTab> {
  final _clientIdCtrl = TextEditingController();
  final _clientSecretCtrl = TextEditingController();
  static const _environmentUrl = 'https://cloud.skychip.top/sdk';
  final _usernameCtrl = TextEditingController();
  final _passwordCtrl = TextEditingController();
  final List<String> _log = [];
  bool _sdkReady = false;
  bool _cloudUserReady = false;
  bool _loggingIn = false;

  void _log_(String msg) {
    final ts = DateTime.now().toIso8601String().substring(11, 19);
    setState(() => _log.add('[$ts] $msg'));
  }

  void _initSdk() {
    final id = _clientIdCtrl.text.trim();
    if (id.isEmpty) {
      _log_(S.isEn ? 'Please fill Client ID' : '请先填写 Client ID');
      return;
    }
    try {
      StarCloudClient.instance.auth.init(
        clientId: id,
        clientSecret: _clientSecretCtrl.text.trim(),
        environmentUrl: _environmentUrl,
      );
      setState(() => _sdkReady = true);
      _log_(S.isEn ? 'SDK Init Success' : 'SDK 初始化成功');
    } catch (e) {
      _log_('${S.isEn ? "Failed" : "失败"}: $e');
    }
  }

  Future<void> _createDemoCloudAccount() async {
    setState(() => _loggingIn = true);
    _log_(S.isEn ? 'Creating SDK cloud account...' : '正在创建 SDK 星云测试账户...');
    try {
      final cloudUser = await StarCloudClient.instance.auth.createCloudUser();
      StarCloudClient.instance.auth.setCloudAccounts([cloudUser]);
      sdkCloudAccountReady.value = true;
      pairedLockId.value = null;
      pairedLock.value = null;
      setState(() => _cloudUserReady = true);
      _log_(S.isEn
          ? 'SDK cloud account is ready. You can scan and pair.'
          : 'SDK 星云账户已就绪。现在可扫描并绑定锁。');
    } catch (e) {
      _log_('${S.isEn ? "Failed" : "失败"}: $e');
    } finally {
      if (mounted) setState(() => _loggingIn = false);
    }
  }

  Future<void> _loginLockService() async {
    final username = _usernameCtrl.text.trim();
    final password = _passwordCtrl.text;
    if (username.isEmpty || password.isEmpty) {
      _log_(S.isEn ? 'Please fill username and password' : '请填写用户名和密码');
      return;
    }
    setState(() => _loggingIn = true);
    _log_(S.isEn ? 'Signing in...' : '正在登录...');
    try {
      String deviceBrand = Platform.isAndroid ? 'android' : 'ios';
      String deviceModel = 'unknown';
      String deviceVersion = 'unknown';
      try {
        final deviceInfo = DeviceInfoPlugin();
        if (Platform.isAndroid) {
          final android = await deviceInfo.androidInfo;
          deviceBrand = android.brand;
          deviceModel = android.model;
          deviceVersion = android.version.release;
        } else if (Platform.isIOS) {
          final ios = await deviceInfo.iosInfo;
          deviceBrand = 'Apple';
          deviceModel = ios.utsname.machine;
          deviceVersion = ios.systemVersion;
        }
      } catch (_) {
        // 设备信息只用于服务端风控，无法读取时使用默认值继续登录。
      }

      // lock.skychip.top token 只用于 WiFi 网关配置，不能替代 SDK 云账户。
      final lockServiceToken =
          await StarCloudClient.instance.auth.loginLockService(
        username: username,
        password: password,
        deviceBrand: deviceBrand,
        deviceModel: deviceModel,
        deviceVersion: deviceVersion,
      );

      lockServiceAccessToken.value = lockServiceToken;
      signedInAccount.value = username;
      _log_(S.isEn ? 'WiFi authorization is ready.' : 'WiFi 网关授权登录成功。');
    } catch (e) {
      _log_('${S.isEn ? "Failed" : "失败"}: $e');
    } finally {
      if (mounted) setState(() => _loggingIn = false);
    }
  }

  @override
  void dispose() {
    _clientIdCtrl.dispose();
    _clientSecretCtrl.dispose();
    _usernameCtrl.dispose();
    _passwordCtrl.dispose();
    super.dispose();
  }

  @override
  Widget build(BuildContext context) {
    return ValueListenableBuilder<bool>(
      valueListenable: S.langNotifier,
      builder: (context, isEn, _) {
        return SingleChildScrollView(
          padding: const EdgeInsets.all(16),
          child: Column(
            crossAxisAlignment: CrossAxisAlignment.stretch,
            children: [
              Card(
                child: Padding(
                  padding:
                      const EdgeInsets.symmetric(horizontal: 12, vertical: 10),
                  child: Wrap(
                    spacing: 8,
                    children: [
                      StatusChip(label: S.sdkStatus, ready: _sdkReady),
                      StatusChip(
                          label: S.cloudUserStatus, ready: _cloudUserReady),
                    ],
                  ),
                ),
              ),
              const SizedBox(height: 16),
              TextField(
                controller: _clientIdCtrl,
                decoration: InputDecoration(
                    labelText: S.clientId,
                    border: const OutlineInputBorder(),
                    prefixIcon: const Icon(Icons.badge_outlined)),
              ),
              const SizedBox(height: 12),
              TextField(
                controller: _clientSecretCtrl,
                obscureText: true,
                decoration: InputDecoration(
                    labelText: S.clientSecret,
                    border: const OutlineInputBorder(),
                    prefixIcon: const Icon(Icons.key_outlined)),
              ),
              const SizedBox(height: 12),
              const SizedBox(height: 16),
              ElevatedButton.icon(
                  onPressed: _initSdk,
                  icon: const Icon(Icons.settings),
                  label: Text(S.step1Init)),
              const SizedBox(height: 16),
              ElevatedButton.icon(
                onPressed:
                    _sdkReady && !_loggingIn ? _createDemoCloudAccount : null,
                icon: const Icon(Icons.person_add_outlined),
                label: Text(
                  _loggingIn ? S.btnProcessing : S.btnCreateTestCloudAccount,
                ),
              ),
              const SizedBox(height: 16),
              TextField(
                controller: _usernameCtrl,
                keyboardType: TextInputType.emailAddress,
                decoration: InputDecoration(
                  labelText: S.accountLabel,
                  border: const OutlineInputBorder(),
                  prefixIcon: const Icon(Icons.person_outline),
                ),
              ),
              const SizedBox(height: 12),
              TextField(
                controller: _passwordCtrl,
                obscureText: true,
                onSubmitted: (_) =>
                    _sdkReady && !_loggingIn ? _loginLockService() : null,
                decoration: InputDecoration(
                  labelText: S.passwordLabel,
                  border: const OutlineInputBorder(),
                  prefixIcon: const Icon(Icons.password),
                ),
              ),
              const SizedBox(height: 8),
              ElevatedButton.icon(
                  onPressed:
                      _sdkReady && !_loggingIn ? _loginLockService : null,
                  icon: _loggingIn
                      ? const SizedBox(
                          width: 18,
                          height: 18,
                          child: CircularProgressIndicator(strokeWidth: 2),
                        )
                      : const Icon(Icons.login),
                  label: Text(
                    _loggingIn
                        ? S.btnProcessing
                        : S.btnLoginForWifiAuthorization,
                  )),
              const SizedBox(height: 16),
              LogArea(log: _log),
            ],
          ),
        );
      },
    );
  }
}