import 'package:flutter/material.dart';
import 'package:miaoji_zhang/shared/theme/app_theme.dart';
import 'package:miaoji_zhang/shared/widgets/app_icons.dart';

/// P24 离线状态：顶部提示条 + AI 入口/tab 控制
class OfflineBar extends StatelessWidget {
  const OfflineBar({super.key});

  @override
  Widget build(BuildContext context) {
    return Container(
      width: double.infinity,
      padding: const EdgeInsets.symmetric(horizontal: 14, vertical: 8),
      color: AppTheme.orange,
      child: Row(
        children: [
          AppIcons.icon(AppIcons.offline, size: 16, color: Colors.white),
          const SizedBox(width: 8),
          const Expanded(
            child: Text(
              '当前无网络 · AI 功能暂不可用 · 手动记账正常',
              style: TextStyle(fontSize: 10.5, color: Colors.white),
            ),
          ),
        ],
      ),
    );
  }
}

/// 检测是否有网络连接（简化版：同时 ping 后端）
class ConnectivityChecker {
  static bool _lastKnown = true;

  static bool get isOnline => _lastKnown;

  static Future<bool> check() async {
    // 简化实现：future 如果需要真正的网络检测，用 connectivity_plus 包
    // 当前返回上次已知状态
    return _lastKnown;
  }

  static void setOffline() => _lastKnown = false;
  static void setOnline() => _lastKnown = true;
}