import 'dart:async';
import 'package:flutter/material.dart';
import 'package:flutter_sdk/starcloud_flutter_sdk.dart';
import '../l10n.dart';
import '../global.dart';
import '../services/video_talk_initializer.dart';
import '../widgets/common_widgets.dart';
import 'package:starcloud/entity/star_cloud_lock_list.dart' as scl;

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

  @override
  State<WifiConfigTab> createState() => _WifiConfigTabState();
}

class _WifiConfigTabState extends State<WifiConfigTab> {
  final List<String> _log = [];
  final _ssidCtrl = TextEditingController();
  final _pwdCtrl = TextEditingController();
  bool _loading = false;

  @override
  void dispose() {
    _ssidCtrl.dispose();
    _pwdCtrl.dispose();
    super.dispose();
  }

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

  Future<void> _initVideoTalk() async {
    try {
      _log_(S.isEn ? 'Initializing video talk...' : '正在初始化视频对讲...');
      await initializeVideoTalk();
      _log_(S.isEn
          ? 'Video talk is ready. App PeerID: ${appPeerId.value}'
          : '视频对讲已初始化。App PeerID: ${appPeerId.value}');
    } catch (e) {
      _log_('${S.logFailed}: $e');
    }
  }

  Future<void> _config() async {
    final lock = pairedLock.value;
    if (lock == null) {
      _log_('ERROR: No device paired.');
      return;
    }

    setState(() => _loading = true);

    final String lockServiceToken = lockServiceAccessToken.value?.trim() ?? '';
    if (signedInAccount.value == null || lockServiceToken.isEmpty) {
      _log_('请先在“登录”页使用锁主账号/管理员账号登录。');
      setState(() => _loading = false);
      return;
    }
    _log_('>>> START CONFIG | HTTP + BLE 0x30F4/0x30F5');

    try {
      final ctx = await StarCloudLockContext.fromLock(lock);
      final String myId = appPeerId.value ?? '';
      if (myId.isEmpty) {
        _log_(S.logConfigCancelledNeedTalkInitialization);
        return;
      }

      _log_(S.logUsingLoginSessionForGatewayConfig);

      final reply = await StarCloudClient.instance.wifi.configureWifiByContext(
        ctx,
        ssid: _ssidCtrl.text.trim(),
        password: _pwdCtrl.text.trim(),
        lockServiceAccessToken: lockServiceToken,
        deviceName: lock.bluetooth.bluetoothDeviceName,
        mac: lock.mac,
      );
      _log_(S.logWifiConfigCompleted);

      try {
        final gatewayStatus =
            await StarCloudClient.instance.wifi.getGatewayStatus(
          lockId: lock.bluetooth.bluetoothDeviceName,
          userId: ctx.userId,
          deviceName: lock.bluetooth.bluetoothDeviceName,
          mac: lock.mac,
        );
        _log_(
            'GATEWAY STATUS: 0x${gatewayStatus.status.toRadixString(16).toUpperCase()}');
      } catch (e) {
        _log_('GATEWAY STATUS QUERY FAILED: $e');
      }

      final blePeerId = reply.peerId?.trim() ?? '';
      if (blePeerId.isNotEmpty) {
        _log_('Lock PeerID from BLE: $blePeerId');
        lock.peerId = blePeerId;
        pairedLock.value = null;
        pairedLock.value = lock;
        unawaited(_waitForLockOnline(lock.lockId));
      } else {
        await _refreshLockPeerId(lock);
      }
    } catch (e) {
      _log_('${S.logFailed}: $e');
    } finally {
      if (mounted) setState(() => _loading = false);
    }
  }

  /// 配网成功后自动回查云端锁详情，回填锁版 peerId，并等待锁上线
  Future<void> _refreshLockPeerId(scl.StarCloudLock lock) async {
    try {
      final fresh =
          await StarCloudClient.instance.device.getDevice(lockId: lock.lockId);
      pairedLock.value = fresh;
      final p = (fresh.peerId ?? '').trim();
      _log_(p.isNotEmpty
          ? 'Lock PeerID after config: $p'
          : 'Lock not reported PeerID yet (may take a while).');
      // 等待锁上线
      unawaited(_waitForLockOnline(lock.lockId));
    } catch (e) {
      _log_('Refresh lock detail failed: $e (retry in Talk tab)');
    }
  }

  /// 配网后轮询等待锁上线（最长等待 120 秒）
  Future<void> _waitForLockOnline(int lockId) async {
    const maxSeconds = 120;
    const interval = Duration(seconds: 5);
    int waited = 0;
    _log_(S.isEn
        ? 'Waiting for lock to come online (this may take 30-60s)...'
        : '等待锁上线（可能需要 30-60 秒）...');
    while (waited < maxSeconds) {
      await Future.delayed(interval);
      waited += 5;
      if (!mounted) return;
      try {
        final fresh =
            await StarCloudClient.instance.device.getDevice(lockId: lockId);
        final bool online = fresh.isOnline ?? false;
        final String peerId = (fresh.peerId ?? '').trim();
        if (online && peerId.isNotEmpty) {
          pairedLock.value = fresh;
          _log_(S.isEn
              ? 'SUCCESS: Lock is ONLINE! peerId=$peerId. You can start monitoring now.'
              : '锁已上线！peerId=$peerId。现在可以开始监控了。');
          return;
        }
        _log_(
            '[${waited}s] ${S.isEn ? "still offline" : "仍未上线"} (peerId=${peerId.isNotEmpty ? peerId : "none"})');
      } catch (e) {
        _log_('Poll online status failed: $e');
      }
    }
    _log_(S.isEn
        ? 'WARNING: Lock did not come online within 120s. Check WiFi signal and try restarting the lock.'
        : '警告：120 秒内锁未上线。请检查 WiFi 信号，或尝试重启锁。');
  }

  @override
  Widget build(BuildContext context) {
    return ValueListenableBuilder<bool>(
      valueListenable: S.langNotifier,
      builder: (context, isEn, _) {
        return ValueListenableBuilder<scl.StarCloudLock?>(
          valueListenable: pairedLock,
          builder: (context, lock, _) {
            return SingleChildScrollView(
              padding: const EdgeInsets.all(16),
              child: Column(
                crossAxisAlignment: CrossAxisAlignment.stretch,
                children: [
                  ValueListenableBuilder<bool>(
                    valueListenable: videoTalkReady,
                    builder: (context, ready, _) {
                      return ValueListenableBuilder<bool>(
                        valueListenable: videoTalkInitializing,
                        builder: (context, initializing, _) {
                          return ElevatedButton.icon(
                            onPressed:
                                ready || initializing ? null : _initVideoTalk,
                            icon: initializing
                                ? const SizedBox(
                                    width: 20,
                                    height: 20,
                                    child: CircularProgressIndicator(
                                      strokeWidth: 2,
                                    ),
                                  )
                                : const Icon(Icons.videocam),
                            label: Text(ready
                                ? '${S.btnInitTalk} (${S.initialized})'
                                : S.btnInitTalk),
                          );
                        },
                      );
                    },
                  ),
                  const SizedBox(height: 16),
                  Text(
                    lock != null
                        ? '${S.pairedStatus}: ${lock.lockName.isNotEmpty ? lock.lockName : "ID:${lock.lockId}"}'
                        : S.notPaired,
                    style: TextStyle(
                      color: lock != null ? Colors.green : Colors.red,
                      fontWeight: FontWeight.w600,
                    ),
                  ),
                  const SizedBox(height: 16),
                  ValueListenableBuilder<String?>(
                    valueListenable: signedInAccount,
                    builder: (context, account, _) => Card(
                      elevation: 0,
                      color: account == null
                          ? Colors.red.shade50
                          : Colors.green.shade50,
                      child: ListTile(
                        leading: Icon(account == null
                            ? Icons.error_outline
                            : Icons.verified_user_outlined),
                        title: Text(account == null
                            ? '未登录'
                            : '${S.currentLoggedInAccountPrefix}$account'),
                        subtitle: Text(account == null
                            ? '请先在“登录”页登录锁主账号/管理员账号。'
                            : S.wifiUsesAuthorizedSession),
                      ),
                    ),
                  ),
                  const SizedBox(height: 12),
                  TextField(
                      controller: _ssidCtrl,
                      decoration: InputDecoration(
                          labelText: isEn ? 'WiFi SSID' : 'WIFI名称',
                          border: const OutlineInputBorder(),
                          prefixIcon: const Icon(Icons.wifi))),
                  const SizedBox(height: 12),
                  TextField(
                      controller: _pwdCtrl,
                      obscureText: true,
                      decoration: InputDecoration(
                          labelText: isEn ? 'WiFi Password' : 'WIFI密码',
                          border: const OutlineInputBorder(),
                          prefixIcon: const Icon(Icons.lock_outline))),
                  const SizedBox(height: 20),
                  ElevatedButton.icon(
                    onPressed: _loading || lock == null ? null : _config,
                    style: ElevatedButton.styleFrom(
                        backgroundColor: Colors.blue,
                        foregroundColor: Colors.white,
                        minimumSize: const Size.fromHeight(50)),
                    icon: _loading
                        ? const SizedBox(
                            width: 20,
                            height: 20,
                            child: CircularProgressIndicator(
                                color: Colors.white, strokeWidth: 2))
                        : const Icon(Icons.send),
                    label: Text(_loading ? S.btnProcessing : S.btnStartConfig),
                  ),
                  const SizedBox(height: 20),
                  LogArea(log: _log),
                ],
              ),
            );
          },
        );
      },
    );
  }
}