// ignore_for_file: unused_import, unused_field, prefer_final_fields

import 'dart:async';
import 'dart:typed_data';
import 'package:chicken_farm/components/vb_app_bar.dart';
import 'package:chicken_farm/core/services/win/win_reader_channel.dart';
import 'package:chicken_farm/core/services/win/win_reader_manager.dart';
import 'package:chicken_farm/core/utils/logger.dart';
import 'package:chicken_farm/core/utils/toast.dart';
import 'package:flutter/material.dart';

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

  @override
  State<SerialSettingPage> createState() => _SerialSettingPageState();
}

class _SerialSettingPageState extends State<SerialSettingPage> {
  final WinReaderManager _readerManager = WinReaderManager();
  List<String> _availablePorts = [];
  String? _selectedPort;
  final TextEditingController _dataController = TextEditingController();
  final List<String> _receivedData = [];
  bool _isConnected = false;
  bool _isReading = false;

  // 设备信息
  String _deviceSN = '';
  String _softVersion = '';
  String _hardVersion = '';

  // 功率相关状态
  int? _currentPower;
  int _selectedPower = 20; // 默认值

  @override
  void initState() {
    super.initState();
    // 注册回调函数
    _readerManager.registerCallbacks(
      onConnect: _onConnect,
      onDataReceived: _onDataReceived,
      onError: _onError,
    );
    _loadUsbPorts();
    // 监听数据流 - 使用WinReaderManager内部处理，无需重复监听
  }

  /// 加载可用Usb列表
  void _loadUsbPorts() async {
    try {
      final ports = await _readerManager.scanUsb();
      if (mounted) {
        // 检查组件是否仍然挂载
        setState(() {
          _availablePorts = ports ?? [];
          if (_availablePorts.isNotEmpty) {
            _selectedPort = _availablePorts.first;
          }
        });
      }
    } catch (e) {
      if (mounted) {
        // 检查组件是否仍然挂载
        logger.e(e);
        ToastUtil.error("扫描USB设备失败: $e");
      }
    }
  }

  /// 连接状态回调
  void _onConnect(bool connected) {
    if (mounted) {
      setState(() {
        _isConnected = connected;
        if (!connected) {
          _isReading = false;
          _deviceSN = '';
          _softVersion = '';
          _hardVersion = '';
          _currentPower = null;
        }
      });

      if (connected) {
        _addLog("成功连接到设备: $_selectedPort");
        // 连接成功后自动查询设备信息
        _autoQueryDeviceInfo();
        // 连接成功后自动查询功率
        _autoQueryPower();
      } else {
        _addLog("已断开设备连接");
      }
    }
  }

  /// 自动查询设备信息
  void _autoQueryDeviceInfo() async {
    String? deviceInfo = await _readerManager.getDeviceInfo();
    if (deviceInfo != null && mounted) {
      // 解析设备信息
      _parseDeviceInfo(deviceInfo);
      _addLog("设备信息查询成功: $deviceInfo");
    } else {
      _addLog("设备信息查询失败");
    }
  }

  /// 自动查询功率
  void _autoQueryPower() async {
    int? power = await _readerManager.getPower();
    if (power != null && mounted) {
      setState(() {
        _currentPower = power;
        _selectedPower = power; // 设置下拉框的默认值为当前功率
      });
      _addLog("功率查询成功: ${power}dBm");
    } else {
      _addLog("功率查询失败");
    }
  }

  /// 解析设备信息字符串
  void _parseDeviceInfo(String deviceInfo) {
    if (mounted) {
      // deviceInfo 格式: "SN:1234567890ABCDEF,SoftVer:1.2,HardVer:3.4"
      List<String> parts = deviceInfo.split(',');

      for (String part in parts) {
        if (part.startsWith('SN:')) {
          setState(() {
            _deviceSN = part.substring(3); // 去掉'SN:'前缀
          });
        } else if (part.startsWith('SoftVer:')) {
          setState(() {
            _softVersion = part.substring(8); // 去掉'SoftVer:'前缀
          });
        } else if (part.startsWith('HardVer:')) {
          setState(() {
            _hardVersion = part.substring(8); // 去掉'HardVer:'前缀
          });
        }
      }
    }
  }

  /// 数据接收回调
  void _onDataReceived(String data) {
    if (mounted) {
      _addLog("读取标签: $data");
    }
  }

  /// 错误回调
  void _onError(String error) {
    if (mounted) {
      _addLog("错误: $error");
      ToastUtil.error("操作失败: $error");
    }
  }

  /// 连接USB
  void _connectUsbPort() async {
    if (_selectedPort == null) {
      ToastUtil.error("请先选择一个USB设备");
      return;
    }

    if (!_isConnected) {
      // 获取当前选中设备的索引
      int deviceIndex = _availablePorts.indexOf(_selectedPort!);
      bool success = await _readerManager.connect(deviceIndex);
      if (!success) {
        ToastUtil.error("连接设备失败");
      }
    } else {
      await _readerManager.disconnect();
    }
  }

  /// 开始读取
  void _startRead() async {
    bool success = await _readerManager.startRead();
    if (success && mounted) {
      setState(() {
        _isReading = true;
      });
      _addLog("开始读取数据");
    }
  }

  /// 停止读取
  void _stopRead() async {
    await _readerManager.stopRead();
    if (mounted) {
      setState(() {
        _isReading = false;
      });
      _addLog("已停止读取数据");
    }
  }

  /// 查询功率
  void _queryPower() async {
    if (!_isConnected) {
      ToastUtil.error("请先连接设备");
      return;
    }

    int? power = await _readerManager.getPower();
    if (power != null && mounted) {
      setState(() {
        _currentPower = power;
        _selectedPower = power;
      });
      _addLog("功率查询成功: ${power}dBm");
    } else {
      _addLog("功率查询失败");
    }
  }

  /// 设置功率
  void _setPower() async {
    if (!_isConnected) {
      ToastUtil.error("请先连接设备");
      return;
    }

    bool success = await _readerManager.setPower(_selectedPower);
    if (success) {
      ToastUtil.success("功率设置成功");
      if (mounted) {
        _addLog("功率设置成功: ${_selectedPower}dBm");
      }
      Future.delayed(const Duration(milliseconds: 500), () {
        _queryPower();
      });
    } else {
      _addLog("功率设置失败");
    }
  }

  /// 添加日志
  void _addLog(String log) {
    if (mounted) {
      setState(() {
        _receivedData.add("${DateTime.now()}: $log");
      });
    }
  }

  /// 清空日志
  void _clearLogs() {
    if (mounted) {
      setState(() {
        _receivedData.clear();
      });
    }
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: VberAppBar(title: 'USB测试工具'),
      body: Padding(
        padding: const EdgeInsets.all(16.0),
        child: SingleChildScrollView(
          physics: const BouncingScrollPhysics(),
          child: Column(
            crossAxisAlignment: CrossAxisAlignment.start,
            children: [
              // 设备信息卡片
              Card(
                child: Padding(
                  padding: const EdgeInsets.all(16.0),
                  child: Column(
                    crossAxisAlignment: CrossAxisAlignment.start,
                    children: [
                      Row(
                        children: [
                          const Text('USB设备:'),
                          const SizedBox(width: 10),
                          Expanded(
                            child: DropdownButton<String>(
                              value: _selectedPort,
                              items: _availablePorts.map((port) {
                                return DropdownMenuItem(
                                  value: port,
                                  child: Text(
                                    port,
                                    overflow: TextOverflow.ellipsis,
                                  ),
                                );
                              }).toList(),
                              onChanged: (value) {
                                if (!_isConnected) {
                                  setState(() {
                                    _selectedPort = value;
                                  });
                                }
                              },
                              hint: const Text('选择USB'),
                              isExpanded: true,
                            ),
                          ),
                          const SizedBox(width: 20),
                          SizedBox(
                            height: 30,
                            child: ElevatedButton(
                              onPressed: _loadUsbPorts,
                              child: const Text('刷新'),
                            ),
                          ),
                          const SizedBox(width: 20),
                          if (_selectedPort != null) ...[
                            SizedBox(
                              height: 30,
                              child: ElevatedButton(
                                onPressed: _connectUsbPort,
                                child: Text(_isConnected ? '关闭连接' : '打开连接'),
                              ),
                            ),
                          ],
                          const SizedBox(width: 20),
                          if (_isConnected) ...[
                            SizedBox(
                              height: 30,
                              child: ElevatedButton(
                                onPressed: _isReading ? _stopRead : _startRead,
                                child: Text(_isReading ? '停止读取' : '开始读取'),
                              ),
                            ),
                          ],
                        ],
                      ),
                      if (_isConnected) ...[
                        const SizedBox(height: 10),
                        Row(
                          children: [
                            const Text(
                              '设备信息: ',
                              style: TextStyle(
                                fontSize: 16,
                                fontWeight: FontWeight.bold,
                              ),
                            ),
                            Expanded(
                              child: _deviceSN.isNotEmpty
                                  ? Row(
                                      children: [
                                        const Text(
                                          'SN: ',
                                          style: TextStyle(
                                            fontWeight: FontWeight.bold,
                                          ),
                                        ),
                                        Text(
                                          _deviceSN,
                                          style: const TextStyle(
                                            fontWeight: FontWeight.w500,
                                          ),
                                        ),
                                        const SizedBox(width: 16),
                                        const Text(
                                          'SoftVer: ',
                                          style: TextStyle(
                                            fontWeight: FontWeight.bold,
                                          ),
                                        ),
                                        Text(
                                          _softVersion,
                                          style: const TextStyle(
                                            fontWeight: FontWeight.w500,
                                          ),
                                        ),
                                        const SizedBox(width: 16),
                                        const Text(
                                          'HardVer: ',
                                          style: TextStyle(
                                            fontWeight: FontWeight.bold,
                                          ),
                                        ),
                                        Text(
                                          _hardVersion,
                                          style: const TextStyle(
                                            fontWeight: FontWeight.w500,
                                          ),
                                        ),
                                      ],
                                    )
                                  : const Text(
                                      '未连接',
                                      style: TextStyle(
                                        fontWeight: FontWeight.w500,
                                      ),
                                    ),
                            ),
                            const SizedBox(width: 20),
                            SizedBox(
                              height: 30,
                              child: ElevatedButton(
                                onPressed: _autoQueryDeviceInfo,
                                child: const Text('刷新设备信息'),
                              ),
                            ),
                          ],
                        ),
                        const SizedBox(height: 10),
                        // 功率设置卡片
                        Row(
                          children: [
                            const Text(
                              '当前功率: ',
                              style: TextStyle(
                                fontSize: 14,
                                fontWeight: FontWeight.bold,
                              ),
                            ),
                            const SizedBox(width: 10),
                            Text(
                              _currentPower != null
                                  ? '${_currentPower}dBm'
                                  : '未查询',
                              style: const TextStyle(
                                fontSize: 14,
                                fontWeight: FontWeight.w500,
                              ),
                            ),
                            const SizedBox(width: 30),
                            SizedBox(
                              height: 30,
                              child: ElevatedButton(
                                onPressed: _queryPower,
                                child: const Text('查询功率'),
                              ),
                            ),
                            const SizedBox(width: 50),
                            const Text(
                              '功率设置: ',
                              style: TextStyle(
                                fontSize: 16,
                                fontWeight: FontWeight.bold,
                              ),
                            ),
                            const SizedBox(width: 10),
                            Expanded(
                              child: DropdownButton<int>(
                                value: _selectedPower,
                                items:
                                    List.generate(
                                          26,
                                          (index) => index + 5,
                                        ) // 5-30的值
                                        .map((value) {
                                          return DropdownMenuItem(
                                            value: value,
                                            child: Text('${value}dBm'),
                                          );
                                        })
                                        .toList(),
                                onChanged: (value) {
                                  if (value != null && _isConnected) {
                                    setState(() {
                                      _selectedPower = value;
                                    });
                                  }
                                },
                                isExpanded: true,
                              ),
                            ),
                            const SizedBox(width: 20),

                            SizedBox(
                              height: 30,
                              child: ElevatedButton(
                                onPressed: _setPower,
                                child: const Text('设置功率'),
                              ),
                            ),
                          ],
                        ),
                        const SizedBox(height: 5),
                      ],
                    ],
                  ),
                ),
              ),
              const SizedBox(height: 20),
              Card(
                child: Padding(
                  padding: const EdgeInsets.all(16.0),
                  child: Column(
                    crossAxisAlignment: CrossAxisAlignment.start,
                    children: [
                      const Text(
                        '数据日志',
                        style: TextStyle(
                          fontSize: 16,
                          fontWeight: FontWeight.bold,
                        ),
                      ),
                      const SizedBox(height: 10),
                      Row(
                        children: [
                          ElevatedButton(
                            onPressed: _clearLogs,
                            child: const Text('清空日志'),
                          ),
                          const SizedBox(width: 10),
                          Text(
                            '日志数量: ${_receivedData.length}',
                            style: const TextStyle(fontWeight: FontWeight.bold),
                          ),
                        ],
                      ),
                      const SizedBox(height: 10),
                      Container(
                        height: 250,
                        decoration: BoxDecoration(
                          border: Border.all(color: Colors.grey),
                          borderRadius: BorderRadius.circular(4),
                        ),
                        child: _receivedData.isEmpty
                            ? const Center(child: Text('暂无日志数据'))
                            : ListView.builder(
                                itemCount: _receivedData.length,
                                itemBuilder: (context, index) {
                                  return Padding(
                                    padding: const EdgeInsets.all(8.0),
                                    child: Text(
                                      _receivedData[_receivedData.length -
                                          1 -
                                          index],
                                      style: const TextStyle(fontSize: 12),
                                    ),
                                  );
                                },
                              ),
                      ),
                    ],
                  ),
                ),
              ),
            ],
          ),
        ),
      ),
    );
  }

  @override
  void dispose() {
    // 在页面销毁时断开设备连接
    if (_isConnected) {
      _readerManager.disconnect();
    }
    
    _readerManager.clearCallbacks();
    _readerManager.dispose();
    _dataController.dispose();
    super.dispose();
  }
}