using System;
using System.Collections.Generic;
using System.Drawing;
using System.Threading.Tasks;
using System.Windows.Forms;
using APS7100TestTool.Controllers;
using APS7100TestTool.Services;
using APS7100TestTool.Models;

namespace APS7100TestTool.Forms
{
    public partial class MainForm : Form
    {
        // Devices
        private ScpiDevice? _deviceAPS7100;
        private ScpiDevice? _devicePSW250;
        private IPowerSupplyController? _controllerAPS7100;
        private IPowerSupplyController? _controllerPSW250;

        // Services
        private ModbusTcpServerService? _modbusService;
        private ConfigService _configService;
        private AppSettings _appSettings;
        private List<ModbusRegisterMapping> _modbusMappings = new List<ModbusRegisterMapping>();

        // Timers
        private System.Windows.Forms.Timer _measureTimer;

        // Child Windows
        private ManualTestForm? _manualTestFormAPS7100;
        private ManualTestForm? _manualTestFormPSW250;

        // 静默启动控制
        private bool _startMinimizedToTray = false;
        private bool _hasShownOnce = false;

        // 缓存的设备标识（避免频繁查询阻塞UI）
        private string _cachedAPS7100IDN = "";
        private string _cachedPSW250IDN = "";

        // 连接中标志（防止定时器阻塞UI）
        private volatile bool _isConnectingAPS7100 = false;
        private volatile bool _isConnectingPSW250 = false;

        public MainForm()
        {
            InitializeComponent();

            // 启用双缓冲减少闪烁
            this.DoubleBuffered = true;
            this.SetStyle(ControlStyles.OptimizedDoubleBuffer |
                          ControlStyles.AllPaintingInWmPaint |
                          ControlStyles.UserPaint, true);
            this.UpdateStyles();

            _configService = new ConfigService();
            _appSettings = _configService.LoadAppSettings();

            // SCPI 命令调试日志（如需诊断，将 false 改为 true）
            ScpiDevice.EnableCommandLog = false;
            ScpiDevice.OnCommandLog += (msg) =>
            {
                BeginInvoke(() => LogMessage(msg));
            };

            // 初始化测量定时器
            _measureTimer = new System.Windows.Forms.Timer();
            _measureTimer.Interval = 1000;
            _measureTimer.Tick += MeasureTimer_Tick;
            _measureTimer.Start();

            // 初始化系统托盘
            InitializeSystemTray();

            // 如果设置启动时最小化，则标记为静默启动
            _startMinimizedToTray = _appSettings.StartMinimized;

            InitializeUI();
        }

        /// <summary>
        /// 初始化系统托盘图标
        /// </summary>
        private void InitializeSystemTray()
        {
            // 创建托盘右键菜单
            trayContextMenu = new ContextMenuStrip();

            trayMenuShow = new ToolStripMenuItem("显示主窗口(&S)");
            trayMenuShow.Font = new Font(trayMenuShow.Font, FontStyle.Bold);
            trayMenuShow.Click += (s, e) => ShowMainWindow();

            trayMenuAPS7100 = new ToolStripMenuItem("APS-7100: 未连接");
            trayMenuAPS7100.Enabled = false;

            trayMenuPSW250 = new ToolStripMenuItem("PSW-250: 未连接");
            trayMenuPSW250.Enabled = false;

            trayMenuSep1 = new ToolStripSeparator();

            trayMenuExit = new ToolStripMenuItem("退出(&X)");
            trayMenuExit.Click += (s, e) => ExitApplication();

            trayContextMenu.Items.AddRange(new ToolStripItem[] {
                trayMenuShow, new ToolStripSeparator(),
                trayMenuAPS7100, trayMenuPSW250,
                trayMenuSep1, trayMenuExit
            });

            // 创建托盘图标
            notifyIcon = new NotifyIcon();
            notifyIcon.Text = "固纬电源测试工具";
            notifyIcon.Icon = this.Icon ?? SystemIcons.Application;
            notifyIcon.ContextMenuStrip = trayContextMenu;
            notifyIcon.Visible = true;

            // 双击托盘图标显示窗口
            notifyIcon.DoubleClick += (s, e) => ShowMainWindow();

            // 托盘气泡提示点击
            notifyIcon.BalloonTipClicked += (s, e) => ShowMainWindow();
        }

        /// <summary>
        /// 重写 SetVisibleCore 以实现静默启动（开机自启动时不显示窗口）
        /// </summary>
        protected override void SetVisibleCore(bool value)
        {
            // 第一次显示时，如果是静默启动模式，则不显示窗口
            if (!_hasShownOnce)
            {
                _hasShownOnce = true;

                if (_startMinimizedToTray)
                {
                    // 静默启动：不显示窗口，只在托盘运行
                    base.SetVisibleCore(false);
                    return;
                }
            }

            base.SetVisibleCore(value);
        }

        /// <summary>
        /// 显示主窗口
        /// </summary>
        private void ShowMainWindow()
        {
            this.Show();
            this.ShowInTaskbar = true;
            this.WindowState = FormWindowState.Normal;
            this.Activate();
            this.BringToFront();
        }

        /// <summary>
        /// 退出应用程序
        /// </summary>
        private void ExitApplication()
        {
            // 先清理资源，再退出
            CleanupResources();

            notifyIcon.Visible = false;
            notifyIcon.Dispose();
            Application.Exit();
        }

        /// <summary>
        /// 清理所有资源（确保端口和连接被正确释放）
        /// </summary>
        private void CleanupResources()
        {
            try
            {
                _measureTimer?.Stop();
                _measureTimer?.Dispose();

                // 停止并释放 Modbus 服务
                if (_modbusService != null)
                {
                    _modbusService.Stop();
                    _modbusService.Dispose();
                    _modbusService = null;
                }

                // 释放设备连接
                if (_deviceAPS7100 != null)
                {
                    _deviceAPS7100.Disconnect();
                    _deviceAPS7100.Dispose();
                    _deviceAPS7100 = null;
                }

                if (_devicePSW250 != null)
                {
                    _devicePSW250.Disconnect();
                    _devicePSW250.Dispose();
                    _devicePSW250 = null;
                }

                _controllerAPS7100 = null;
                _controllerPSW250 = null;
            }
            catch (Exception ex)
            {
                System.Diagnostics.Debug.WriteLine($"清理资源时出错: {ex.Message}");
            }
        }

        /// <summary>
        /// 窗口大小改变时处理（最小化到托盘）
        /// </summary>
        protected override void OnResize(EventArgs e)
        {
            base.OnResize(e);

            if (this.WindowState == FormWindowState.Minimized)
            {
                this.Hide();
                this.ShowInTaskbar = false;
            }
        }

        /// <summary>
        /// 更新托盘菜单中的设备状态
        /// </summary>
        private void UpdateTrayStatus()
        {
            if (trayMenuAPS7100 != null)
            {
                bool aps7100Connected = _deviceAPS7100?.IsConnected == true;
                trayMenuAPS7100.Text = aps7100Connected ? "APS-7100: ✓ 已连接" : "APS-7100: 未连接";
            }

            if (trayMenuPSW250 != null)
            {
                bool psw250Connected = _devicePSW250?.IsConnected == true;
                trayMenuPSW250.Text = psw250Connected ? "PSW-250: ✓ 已连接" : "PSW-250: 未连接";
            }

            // 更新托盘图标提示文字
            if (notifyIcon != null)
            {
                bool aps = _deviceAPS7100?.IsConnected == true;
                bool psw = _devicePSW250?.IsConnected == true;
                string status = "";
                if (aps) status += "APS7100 ✓ ";
                if (psw) status += "PSW250 ✓";
                if (string.IsNullOrEmpty(status)) status = "未连接设备";
                notifyIcon.Text = $"固纬电源测试工具\n{status}";
            }
        }

        private void InitializeUI()
        {
            UpdateAPS7100Status();
            UpdatePSW250Status();
            UpdateModbusStatus();

            LogMessage("程序启动完成");

            // 自动加载 Modbus 配置
            AutoLoadModbusConfig();

            // 执行自动连接和 Modbus 启动（异步）
            _ = AutoConnectAndStartModbusAsync();
        }

        /// <summary>
        /// 自动连接设备并启动 Modbus 服务（按顺序执行，确保时序正确）
        /// </summary>
        private async Task AutoConnectAndStartModbusAsync()
        {
            var connectTasks = new List<Task>();

            // 自动连接设备（并行执行）
            if (_appSettings.AutoConnectAPS7100)
            {
                LogMessage("正在自动连接 APS-7100...");
                connectTasks.Add(ConnectAPS7100Async());
            }

            if (_appSettings.AutoConnectPSW250)
            {
                LogMessage("正在自动连接 PSW-250...");
                connectTasks.Add(ConnectPSW250Async());
            }

            // 等待所有连接任务完成（无论成功还是失败）
            if (connectTasks.Count > 0)
            {
                await Task.WhenAll(connectTasks);
            }

            // 连接完成后再启动 Modbus 服务（带重试机制）
            if (_appSettings.AutoStartModbus && _modbusMappings.Count > 0)
            {
                LogMessage("正在自动启动 Modbus 服务...");
                await StartModbusServiceWithRetryAsync(maxRetries: 3, delayMs: 1000);
            }
        }

        /// <summary>
        /// 带重试机制的 Modbus 服务启动
        /// </summary>
        private async Task StartModbusServiceWithRetryAsync(int maxRetries = 3, int delayMs = 1000)
        {
            for (int attempt = 1; attempt <= maxRetries; attempt++)
            {
                try
                {
                    StartModbusService();

                    // 检查是否真的启动成功
                    if (_modbusService != null && _modbusService.IsRunning)
                    {
                        return; // 启动成功，退出
                    }
                    else
                    {
                        LogMessage($"Modbus 服务启动后状态异常 (尝试 {attempt}/{maxRetries})");
                    }
                }
                catch (Exception ex)
                {
                    LogMessage($"Modbus 服务启动异常 (尝试 {attempt}/{maxRetries}): {ex.Message}");
                }

                // 如果不是最后一次尝试，等待后重试
                if (attempt < maxRetries)
                {
                    LogMessage($"将在 {delayMs}ms 后重试...");
                    await Task.Delay(delayMs);
                }
            }

            LogMessage("⚠ Modbus 服务自动启动失败，请手动启动");
        }

        /// <summary>
        /// 将相对路径转换为绝对路径（相对于程序运行目录）
        /// </summary>
        private string ResolveConfigPath(string path)
        {
            if (string.IsNullOrEmpty(path)) return path;

            // 如果已经是绝对路径，直接返回
            if (System.IO.Path.IsPathRooted(path)) return path;

            // 相对路径：转换为相对于程序运行目录的绝对路径
            return System.IO.Path.Combine(AppDomain.CurrentDomain.BaseDirectory, path);
        }

        /// <summary>
        /// 自动加载上次保存的 Modbus 配置
        /// </summary>
        private void AutoLoadModbusConfig()
        {
            // 优先使用上次保存的配置文件路径（支持相对路径）
            string configPath = ResolveConfigPath(_appSettings.ModbusConfigPath);

            // 如果没有配置路径或文件不存在，尝试使用默认路径
            if (string.IsNullOrEmpty(configPath) || !System.IO.File.Exists(configPath))
            {
                configPath = ConfigService.DefaultModbusConfigPath;
            }

            if (System.IO.File.Exists(configPath))
            {
                try
                {
                    _modbusMappings = _configService.LoadModbusConfig(configPath);
                    LogMessage($"✓ 自动加载 Modbus 配置: {configPath} ({_modbusMappings.Count} 条规则)");
                    UpdateModbusStatus();
                }
                catch (Exception ex)
                {
                    LogMessage($"自动加载 Modbus 配置失败: {ex.Message}");
                }
            }
        }

        #region APS7100 Connection

        private async void btnConnectAPS7100_Click(object sender, EventArgs e)
        {
            // 如果正在连接中，忽略点击
            if (_isConnectingAPS7100)
            {
                LogMessage("APS7100 正在连接中，请稍候...");
                return;
            }

            if (_deviceAPS7100 != null && _deviceAPS7100.IsConnected)
            {
                DisconnectAPS7100();
            }
            else
            {
                await ShowConnectionDialogAsync(DeviceType.APS7100);
            }
        }

        private async void menuConnectAPS7100_Click(object sender, EventArgs e)
        {
            if (_deviceAPS7100 != null && _deviceAPS7100.IsConnected)
            {
                DisconnectAPS7100();
            }
            else
            {
                await ShowConnectionDialogAsync(DeviceType.APS7100);
            }
        }

        private async Task ConnectAPS7100Async()
        {
            // 禁用按钮，显示连接中状态
            btnConnectAPS7100.Enabled = false;
            btnConnectAPS7100.Text = "连接中...";
            menuConnectAPS7100.Enabled = false;
            _isConnectingAPS7100 = true;

            try
            {
                LogMessage("APS7100 开始连接...");

                // 确保旧连接被正确清理
                if (_deviceAPS7100 != null)
                {
                    LogMessage("  清理旧连接...");
                    try { _deviceAPS7100.Disconnect(); } catch { }
                    try { _deviceAPS7100.Dispose(); } catch { }
                    _deviceAPS7100 = null;
                    _controllerAPS7100 = null;
                }

                // 等待后台任务完成和资源释放
                await Task.Delay(500);

                // 强制垃圾回收以释放网络资源
                GC.Collect();
                GC.WaitForPendingFinalizers();
                await Task.Delay(200);

                // 尝试连接（带重试）
                // 设备断电重启后可能需要时间初始化网络服务，使用递增间隔重试
                int maxRetries = 5;
                int[] retryDelays = { 0, 1000, 2000, 3000, 5000 }; // 递增间隔
                Exception? lastException = null;

                for (int retry = 0; retry < maxRetries; retry++)
                {
                    if (retry > 0)
                    {
                        int delay = retryDelays[Math.Min(retry, retryDelays.Length - 1)];
                        LogMessage($"  [APS7100] 等待 {delay / 1000.0:F1} 秒后重试连接 ({retry}/{maxRetries - 1})...");
                        await Task.Delay(delay);
                    }

                    try
                    {
                        await Task.Run(() =>
                        {
                            _deviceAPS7100 = new ScpiDevice();

                            if (_appSettings.APS7100ConnectionType == "Serial")
                            {
                                if (string.IsNullOrEmpty(_appSettings.APS7100ComPort))
                                {
                                    throw new Exception("未配置串口");
                                }
                                _deviceAPS7100.ConnectSerial(_appSettings.APS7100ComPort, _appSettings.APS7100BaudRate);
                            }
                            else
                            {
                                _deviceAPS7100.ConnectEthernet(_appSettings.APS7100IpAddress, _appSettings.APS7100Port);
                            }

                            _controllerAPS7100 = new APS7100Controller(_deviceAPS7100);
                        });

                        string connInfo = _appSettings.APS7100ConnectionType == "Serial"
                            ? $"{_appSettings.APS7100ComPort} @ {_appSettings.APS7100BaudRate}"
                            : $"{_appSettings.APS7100IpAddress}:{_appSettings.APS7100Port}";
                        LogMessage($"APS7100 连接成功: {connInfo}");

                        // 获取设备标识（异步执行，避免阻塞UI）
                        _cachedAPS7100IDN = await Task.Run(() => _controllerAPS7100!.GetIdentification());
                        LogMessage($"✓ APS7100 设备识别: {_cachedAPS7100IDN}");

                        // 进入远程控制模式（部分设备可能不支持）
                        try
                        {   //发送*IDN? 命令后，会自动切换到远程模式，无需再发送远程切换
                            //await Task.Run(() => _controllerAPS7100!.SetRemoteMode());
                            LogMessage($"✓ APS7100 已进入远程控制模式");
                        }
                        catch (Exception remEx)
                        {
                            LogMessage($"⚠ APS7100 远程模式命令失败（可忽略）: {remEx.Message}");
                        }

                        UpdateAPS7100Status();
                        UpdateManualTestController(DeviceType.APS7100);

                        // 更新 Modbus 服务的控制器引用
                        _modbusService?.UpdateControllers(_controllerAPS7100, _controllerPSW250);

                        // 连接成功，退出重试循环
                        break;
                    }
                    catch (Exception ex)
                    {
                        lastException = ex;
                        LogMessage($"  [APS7100] 连接尝试 {retry + 1} 失败: {ex.Message}");

                        // 清理本次失败的连接资源
                        if (_deviceAPS7100 != null)
                        {
                            try { _deviceAPS7100.Disconnect(); } catch { }
                            try { _deviceAPS7100.Dispose(); } catch { }
                            _deviceAPS7100 = null;
                        }
                        _controllerAPS7100 = null;

                        // 如果不是最后一次重试，继续
                        if (retry < maxRetries - 1)
                        {
                            continue;
                        }

                        // 最后一次重试也失败了
                        int totalWaitTime = 0;
                        for (int i = 0; i < maxRetries; i++) totalWaitTime += retryDelays[Math.Min(i, retryDelays.Length - 1)];
                        LogMessage($"[APS7100] 连接失败（已尝试 {maxRetries} 次，总等待约 {totalWaitTime / 1000 + maxRetries * 5} 秒）");
                        LogMessage($"  错误: {ex.Message}");
                        if (ex.InnerException != null)
                        {
                            LogMessage($"  内部错误: {ex.InnerException.Message}");
                        }
                        LogMessage($"  提示: 如果设备刚断电重启，请等待设备完全启动后再试");
                        UpdateAPS7100Status();
                    }
                } // end for retry loop
            }
            finally
            {
                // 恢复按钮状态
                _isConnectingAPS7100 = false;
                btnConnectAPS7100.Enabled = true;
                menuConnectAPS7100.Enabled = true;
                UpdateAPS7100Status(); // 更新按钮文字
            }
        }

        // 防止重复断开
        private volatile bool _isDisconnectingAPS7100 = false;

        private void DisconnectAPS7100()
        {
            // 防止重复断开
            if (_isDisconnectingAPS7100) return;
            if (_deviceAPS7100 == null && _controllerAPS7100 == null) return;

            _isDisconnectingAPS7100 = true;

            try
            {
                // 断开前返回本地模式
                if (_controllerAPS7100 != null && _deviceAPS7100?.IsConnected == true)
                {
                    try
                    {
                        _controllerAPS7100.SetLocalMode();
                    }
                    catch { /* 忽略断开时的错误 */ }
                }

                var device = _deviceAPS7100;
                _deviceAPS7100 = null;
                _controllerAPS7100 = null;

                if (device != null)
                {
                    try { device.Disconnect(); } catch { }
                    try { device.Dispose(); } catch { }
                }

                LogMessage("APS7100 已断开连接");
                UpdateAPS7100Status();
                UpdateManualTestController(DeviceType.APS7100);

                // 更新 Modbus 服务的控制器引用
                _modbusService?.UpdateControllers(_controllerAPS7100, _controllerPSW250);
            }
            catch (Exception ex)
            {
                LogMessage($"断开APS7100失败: {ex.Message}");
            }
            finally
            {
                _isDisconnectingAPS7100 = false;
            }
        }

        private async Task ShowConnectionDialogAsync(DeviceType deviceType)
        {
            using (var dialog = new ConnectionDialog(_appSettings, deviceType))
            {
                if (dialog.ShowDialog() == DialogResult.OK)
                {
                    _appSettings = dialog.Settings;
                    _configService.SaveAppSettings(_appSettings);

                    if (deviceType == DeviceType.APS7100)
                        await ConnectAPS7100Async();
                    else
                        await ConnectPSW250Async();
                }
            }
        }

        #endregion

        #region PSW250 Connection

        private async void btnConnectPSW250_Click(object sender, EventArgs e)
        {
            // 如果正在连接中，忽略点击
            if (_isConnectingPSW250)
            {
                LogMessage("PSW250 正在连接中，请稍候...");
                return;
            }

            if (_devicePSW250 != null && _devicePSW250.IsConnected)
            {
                DisconnectPSW250();
            }
            else
            {
                await ShowConnectionDialogAsync(DeviceType.PSW250);
            }
        }

        private async void menuConnectPSW250_Click(object sender, EventArgs e)
        {
            if (_devicePSW250 != null && _devicePSW250.IsConnected)
            {
                DisconnectPSW250();
            }
            else
            {
                await ShowConnectionDialogAsync(DeviceType.PSW250);
            }
        }

        private async Task ConnectPSW250Async()
        {
            // 禁用按钮，显示连接中状态
            btnConnectPSW250.Enabled = false;
            btnConnectPSW250.Text = "连接中...";
            menuConnectPSW250.Enabled = false;
            _isConnectingPSW250 = true;

            try
            {
                LogMessage("PSW250 开始连接...");

                // 确保旧连接被正确清理
                if (_devicePSW250 != null)
                {
                    LogMessage("  清理旧连接...");
                    try { _devicePSW250.Disconnect(); } catch { }
                    try { _devicePSW250.Dispose(); } catch { }
                    _devicePSW250 = null;
                    _controllerPSW250 = null;
                }

                // 等待后台任务完成和资源释放
                await Task.Delay(500);

                // 强制垃圾回收以释放网络资源
                GC.Collect();
                GC.WaitForPendingFinalizers();
                await Task.Delay(200);

                // 尝试连接（带重试）
                // 设备断电重启后可能需要时间初始化网络服务，使用递增间隔重试
                int maxRetries = 5;
                int[] retryDelays = { 0, 1000, 2000, 3000, 5000 }; // 递增间隔
                Exception? lastException = null;

                for (int retry = 0; retry < maxRetries; retry++)
                {
                    if (retry > 0)
                    {
                        int delay = retryDelays[Math.Min(retry, retryDelays.Length - 1)];
                        LogMessage($"  [PSW250] 等待 {delay / 1000.0:F1} 秒后重试连接 ({retry}/{maxRetries - 1})...");
                        await Task.Delay(delay);
                    }

                    try
                    {
                        await Task.Run(() =>
                        {
                            _devicePSW250 = new ScpiDevice();

                            if (_appSettings.PSW250ConnectionType == "Serial")
                            {
                                if (string.IsNullOrEmpty(_appSettings.PSW250ComPort))
                                {
                                    throw new Exception("未配置串口");
                                }
                                _devicePSW250.ConnectSerial(_appSettings.PSW250ComPort, _appSettings.PSW250BaudRate);
                            }
                            else
                            {
                                _devicePSW250.ConnectEthernet(_appSettings.PSW250IpAddress, _appSettings.PSW250Port);
                            }

                            _controllerPSW250 = new PSW250Controller(_devicePSW250);
                        });

                        string connInfo = _appSettings.PSW250ConnectionType == "Serial"
                            ? $"{_appSettings.PSW250ComPort} @ {_appSettings.PSW250BaudRate}"
                            : $"{_appSettings.PSW250IpAddress}:{_appSettings.PSW250Port}";
                        LogMessage($"PSW250 连接成功: {connInfo}");

                        // 获取设备标识（异步执行，避免阻塞UI）
                        _cachedPSW250IDN = await Task.Run(() => _controllerPSW250!.GetIdentification());
                        LogMessage($"✓ PSW250 设备识别: {_cachedPSW250IDN}");

                        // 进入远程控制模式
                        await Task.Run(() => _controllerPSW250!.SetRemoteMode());
                        LogMessage($"✓ PSW250 已进入远程控制模式");

                        UpdatePSW250Status();
                        UpdateManualTestController(DeviceType.PSW250);

                        // 更新 Modbus 服务的控制器引用
                        _modbusService?.UpdateControllers(_controllerAPS7100, _controllerPSW250);

                        // 连接成功，退出重试循环
                        break;
                    }
                    catch (Exception ex)
                    {
                        lastException = ex;
                        LogMessage($"  [PSW250] 连接尝试 {retry + 1} 失败: {ex.Message}");

                        // 清理本次失败的连接资源
                        if (_devicePSW250 != null)
                        {
                            try { _devicePSW250.Disconnect(); } catch { }
                            try { _devicePSW250.Dispose(); } catch { }
                            _devicePSW250 = null;
                        }
                        _controllerPSW250 = null;

                        // 如果不是最后一次重试，继续
                        if (retry < maxRetries - 1)
                        {
                            continue;
                        }

                        // 最后一次重试也失败了
                        int totalWaitTime = 0;
                        for (int i = 0; i < maxRetries; i++) totalWaitTime += retryDelays[Math.Min(i, retryDelays.Length - 1)];
                        LogMessage($"[PSW250] 连接失败（已尝试 {maxRetries} 次，总等待约 {totalWaitTime / 1000 + maxRetries * 5} 秒）");
                        LogMessage($"  错误: {ex.Message}");
                        if (ex.InnerException != null)
                        {
                            LogMessage($"  内部错误: {ex.InnerException.Message}");
                        }
                        LogMessage($"  提示: 如果设备刚断电重启，请等待设备完全启动后再试");
                        UpdatePSW250Status();
                    }
                } // end for retry loop
            }
            finally
            {
                // 恢复按钮状态
                _isConnectingPSW250 = false;
                btnConnectPSW250.Enabled = true;
                menuConnectPSW250.Enabled = true;
                UpdatePSW250Status(); // 更新按钮文字
            }
        }

        // 防止重复断开
        private volatile bool _isDisconnectingPSW250 = false;

        private void DisconnectPSW250()
        {
            // 防止重复断开
            if (_isDisconnectingPSW250) return;
            if (_devicePSW250 == null && _controllerPSW250 == null) return;

            _isDisconnectingPSW250 = true;

            try
            {
                // 断开前返回本地模式
                if (_controllerPSW250 != null && _devicePSW250?.IsConnected == true)
                {
                    try
                    {
                        _controllerPSW250.SetLocalMode();
                    }
                    catch { /* 忽略断开时的错误 */ }
                }

                var device = _devicePSW250;
                _devicePSW250 = null;
                _controllerPSW250 = null;

                if (device != null)
                {
                    try { device.Disconnect(); } catch { }
                    try { device.Dispose(); } catch { }
                }

                LogMessage("PSW250 已断开连接");
                UpdatePSW250Status();
                UpdateManualTestController(DeviceType.PSW250);

                // 更新 Modbus 服务的控制器引用
                _modbusService?.UpdateControllers(_controllerAPS7100, _controllerPSW250);
            }
            catch (Exception ex)
            {
                LogMessage($"断开PSW250失败: {ex.Message}");
            }
            finally
            {
                _isDisconnectingPSW250 = false;
            }
        }

        #endregion

        #region Status Updates

        private void UpdateAPS7100Status()
        {
            bool connected = _deviceAPS7100 != null && _deviceAPS7100.IsConnected;

            if (connected)
            {
                pnlAPS7100Indicator.BackColor = Color.LimeGreen;
                lblAPS7100ConnStatus.Text = "已连接";
                lblAPS7100ConnStatus.ForeColor = Color.Green;

                string connInfo = _appSettings.APS7100ConnectionType == "Serial"
                    ? $"串口: {_appSettings.APS7100ComPort}"
                    : $"网口: {_appSettings.APS7100IpAddress}:{_appSettings.APS7100Port}";
                lblAPS7100ConnInfo.Text = $"连接信息: {connInfo}";

                // 使用缓存的设备标识，避免阻塞UI
                string idn = !string.IsNullOrEmpty(_cachedAPS7100IDN) ? _cachedAPS7100IDN : "--";
                lblAPS7100IDN.Text = $"设备: {(idn.Length > 40 ? idn.Substring(0, 40) + "..." : idn)}";

                btnConnectAPS7100.Text = "断 开";
                btnConnectAPS7100.BackColor = Color.LightCoral;
                menuConnectAPS7100.Text = "断开 APS-7100";
            }
            else
            {
                pnlAPS7100Indicator.BackColor = Color.Gray;
                lblAPS7100ConnStatus.Text = "未连接";
                lblAPS7100ConnStatus.ForeColor = Color.Gray;
                lblAPS7100ConnInfo.Text = "连接信息: --";
                lblAPS7100IDN.Text = "设备: --";
                lblAPS7100OutputStatus.Text = "OFF";
                lblAPS7100OutputStatus.ForeColor = Color.Gray;
                lblAPS7100VoltageValue.Text = "--- V";
                lblAPS7100CurrentValue.Text = "--- A";
                lblAPS7100PowerValue.Text = "--- W";
                lblAPS7100FreqValue.Text = "--- Hz";
                lblAPS7100PFValue.Text = "---";

                btnConnectAPS7100.Text = "连 接";
                btnConnectAPS7100.BackColor = Color.LightGreen;
                menuConnectAPS7100.Text = "连接 APS-7100...";

                // 清除缓存
                _cachedAPS7100IDN = "";
            }

            UpdateTrayStatus();
        }

        private void UpdatePSW250Status()
        {
            bool connected = _devicePSW250 != null && _devicePSW250.IsConnected;

            if (connected)
            {
                pnlPSW250Indicator.BackColor = Color.LimeGreen;
                lblPSW250ConnStatus.Text = "已连接";
                lblPSW250ConnStatus.ForeColor = Color.Green;

                string connInfo = _appSettings.PSW250ConnectionType == "Serial"
                    ? $"串口: {_appSettings.PSW250ComPort}"
                    : $"网口: {_appSettings.PSW250IpAddress}:{_appSettings.PSW250Port}";
                lblPSW250ConnInfo.Text = $"连接信息: {connInfo}";

                // 使用缓存的设备标识，避免阻塞UI
                string idn = !string.IsNullOrEmpty(_cachedPSW250IDN) ? _cachedPSW250IDN : "--";
                lblPSW250IDN.Text = $"设备: {(idn.Length > 40 ? idn.Substring(0, 40) + "..." : idn)}";

                btnConnectPSW250.Text = "断 开";
                btnConnectPSW250.BackColor = Color.LightCoral;
                menuConnectPSW250.Text = "断开 PSW-250";
            }
            else
            {
                pnlPSW250Indicator.BackColor = Color.Gray;
                lblPSW250ConnStatus.Text = "未连接";
                lblPSW250ConnStatus.ForeColor = Color.Gray;
                lblPSW250ConnInfo.Text = "连接信息: --";
                lblPSW250IDN.Text = "设备: --";
                lblPSW250OutputStatus.Text = "OFF";
                lblPSW250OutputStatus.ForeColor = Color.Gray;
                lblPSW250ModeValue.Text = "--";
                lblPSW250ModeValue.ForeColor = Color.DarkOrange;
                lblPSW250VoltageValue.Text = "--- V";
                lblPSW250CurrentValue.Text = "--- A";
                lblPSW250PowerValue.Text = "--- W";

                btnConnectPSW250.Text = "连 接";
                btnConnectPSW250.BackColor = Color.LightGreen;
                menuConnectPSW250.Text = "连接 PSW-250...";

                // 清除缓存
                _cachedPSW250IDN = "";
            }

            UpdateTrayStatus();
        }

        private void UpdateModbusStatus()
        {
            bool running = _modbusService != null && _modbusService.IsRunning;

            if (running)
            {
                lblModbusStatusText.Text = "● 运行中";
                lblModbusStatusText.ForeColor = Color.Green;
                menuModbusStart.Text = "停止服务";
            }
            else
            {
                lblModbusStatusText.Text = "● 未启动";
                lblModbusStatusText.ForeColor = Color.Gray;
                menuModbusStart.Text = "启动服务";

                // 服务未运行时重置客户端状态显示
                lblModbusClientCount.Text = "客户端: --";
                lblModbusClientCount.ForeColor = Color.Gray;
                lblModbusRequestCount.Text = "请求: --";
                lblModbusLastRequest.Text = "最后通讯: --";
            }

            lblModbusPort.Text = $"端口: {_appSettings.ModbusPort}";
            lblModbusConfigCount.Text = $"规则: {_modbusMappings.Count} 条";
        }

        /// <summary>
        /// 更新 Modbus 客户端连接状态显示
        /// </summary>
        private void UpdateModbusClientStatus(int clientCount, int requestCount, DateTime lastRequest)
        {
            // 更新客户端数
            lblModbusClientCount.Text = $"客户端: {clientCount}";
            lblModbusClientCount.ForeColor = clientCount > 0 ? Color.Green : Color.Gray;

            // 更新请求数
            lblModbusRequestCount.Text = $"请求: {requestCount}";

            // 更新最后通讯时间
            if (lastRequest > DateTime.MinValue)
            {
                var elapsed = DateTime.Now - lastRequest;
                if (elapsed.TotalSeconds < 60)
                    lblModbusLastRequest.Text = $"最后通讯: {elapsed.TotalSeconds:F0}秒前";
                else if (elapsed.TotalMinutes < 60)
                    lblModbusLastRequest.Text = $"最后通讯: {elapsed.TotalMinutes:F0}分钟前";
                else
                    lblModbusLastRequest.Text = $"最后通讯: {lastRequest:HH:mm:ss}";
            }
            else
            {
                lblModbusLastRequest.Text = "最后通讯: --";
            }

        }

        /// <summary>
        /// 实时更新 Modbus 心跳和设备状态显示
        /// </summary>
        private void UpdateModbusHeartbeatDisplay()
        {
            if (_modbusService != null && _modbusService.IsRunning)
            {
                // 显示心跳（地址:值）
                lblModbusHeartbeat.Text = $"心跳[{_appSettings.HeartbeatRegisterAddress}]: {_modbusService.HeartbeatValue}";

                // 显示设备状态（地址:值）
                var (aps, psw) = _modbusService.DeviceStatus;
                ushort statusValue = 0;
                if (aps) statusValue |= 0x0001;
                if (psw) statusValue |= 0x0002;

                string statusText = "";
                if (aps && psw) statusText = "APS+PSW";
                else if (aps) statusText = "APS";
                else if (psw) statusText = "PSW";
                else statusText = "无";

                lblModbusDeviceStatus.Text = $"设备[{_appSettings.DeviceStatusRegisterAddress}]: {statusValue} ({statusText})";
                lblModbusDeviceStatus.ForeColor = (aps || psw) ? Color.DarkCyan : Color.Gray;
            }
            else
            {
                lblModbusHeartbeat.Text = "心跳: --";
                lblModbusDeviceStatus.Text = "设备: --";
                lblModbusDeviceStatus.ForeColor = Color.Gray;
            }
        }

        #endregion

        #region Timer Tick

        // 防止测量操作重叠
        private volatile bool _isMeasuring = false;

        private async void MeasureTimer_Tick(object? sender, EventArgs e)
        {
            // 如果正在连接或正在测量，跳过本次
            if (_isConnectingAPS7100 || _isConnectingPSW250 || _isMeasuring)
                return;

            _isMeasuring = true;

            try
            {
                bool aps7100Connected = _deviceAPS7100?.IsConnected == true && !_isConnectingAPS7100;
                bool psw250Connected = _devicePSW250?.IsConnected == true && !_isConnectingPSW250;

                // 更新 Modbus 服务的设备状态（用于心跳）
                _modbusService?.UpdateDeviceStatus(aps7100Connected, psw250Connected);

                // 实时更新 Modbus 心跳和设备状态显示
                UpdateModbusHeartbeatDisplay();

                // 并行执行两个设备的测量，避免串行等待
                Task? aps7100Task = null;
                Task? psw250Task = null;

                // APS7100 测量任务
                if (_controllerAPS7100 != null && aps7100Connected)
                {
                    var controller = _controllerAPS7100;
                    aps7100Task = Task.Run(() =>
                    {
                        // 为每个命令单独处理异常，避免一个失败导致全部失败
                        double voltage = 0, current = 0, power = 0, frequency = 0, powerFactor = 0;
                        bool outputOn = false;
                        int failCount = 0;

                        try { voltage = controller.MeasureVoltage(); } catch { failCount++; }
                        try { current = controller.MeasureCurrent(); } catch { failCount++; }
                        try { power = controller.MeasurePower(); } catch { failCount++; }
                        try { frequency = controller.MeasureFrequency(); } catch { failCount++; }
                        try { powerFactor = controller.MeasurePowerFactor(); } catch { failCount++; }
                        try { outputOn = controller.GetOutputState(); } catch { failCount++; }

                        return new
                        {
                            Voltage = voltage,
                            Current = current,
                            Power = power,
                            Frequency = frequency,
                            PowerFactor = powerFactor,
                            OutputOn = outputOn,
                            ConnectionLost = failCount >= 2
                        }; // 2个以上命令失败认为连接丢失
                    }).ContinueWith(t =>
                    {
                        if (t.IsCompletedSuccessfully && !this.IsDisposed)
                        {
                            var m = t.Result;
                            this.BeginInvoke((MethodInvoker)delegate
                            {
                                if (m.ConnectionLost)
                                {
                                    // 连接丢失，自动断开
                                    LogMessage("⚠ APS7100 连接丢失，设备可能已断电");
                                    DisconnectAPS7100();
                                }
                                else
                                {
                                    lblAPS7100VoltageValue.Text = $"{m.Voltage:F2} V";
                                    lblAPS7100CurrentValue.Text = $"{m.Current:F3} A";
                                    lblAPS7100PowerValue.Text = $"{m.Power:F2} W";
                                    lblAPS7100FreqValue.Text = $"{m.Frequency:F2} Hz";
                                    lblAPS7100PFValue.Text = $"{m.PowerFactor:F3}";
                                    lblAPS7100OutputStatus.Text = m.OutputOn ? "ON" : "OFF";
                                    lblAPS7100OutputStatus.ForeColor = m.OutputOn ? Color.Green : Color.Gray;
                                }
                            });
                        }
                    }, TaskScheduler.Default);
                }

                // PSW250 测量任务
                if (_controllerPSW250 != null && psw250Connected)
                {
                    var controller = _controllerPSW250;
                    psw250Task = Task.Run(() =>
                    {
                        double voltage = 0, current = 0, power = 0;
                        bool outputOn = false;
                        int failCount = 0;

                        try { voltage = controller.MeasureVoltage(); } catch { failCount++; }
                        try { current = controller.MeasureCurrent(); } catch { failCount++; }
                        try { power = controller.MeasurePower(); } catch { failCount++; }
                        try { outputOn = controller.GetOutputState(); } catch { failCount++; }

                        // 获取 OUTP:MODE 控制优先级设置
                        string outputMode = "CVHS";
                        if (controller is Controllers.PSW250Controller pswController)
                        {
                            try
                            {
                                var mode = pswController.GetOutputMode();
                                outputMode = mode.ToString();
                            }
                            catch { outputMode = "--"; }
                        }

                        // 判断实际运行状态（CV/CC）
                        string runState = "CV";
                        try
                        {
                            var setCurrent = controller.GetCurrent();
                            if (setCurrent > 0.01 && current >= setCurrent * 0.98)
                            {
                                runState = "CC";
                            }
                        }
                        catch { }

                        return new
                        {
                            Voltage = voltage,
                            Current = current,
                            Power = power,
                            OutputOn = outputOn,
                            OutputMode = outputMode,
                            RunState = runState,
                            ConnectionLost = failCount >= 2  // 2个以上命令失败认为连接丢失
                        };
                    }).ContinueWith(t =>
                    {
                        if (t.IsCompletedSuccessfully && !this.IsDisposed)
                        {
                            var m = t.Result;
                            this.BeginInvoke((MethodInvoker)delegate
                            {
                                if (m.ConnectionLost)
                                {
                                    // 连接丢失，自动断开
                                    LogMessage("⚠ PSW250 连接丢失，设备可能已断电");
                                    DisconnectPSW250();
                                }
                                else
                                {
                                    lblPSW250VoltageValue.Text = $"{m.Voltage:F2} V";
                                    lblPSW250CurrentValue.Text = $"{m.Current:F3} A";
                                    lblPSW250PowerValue.Text = $"{m.Power:F2} W";
                                    lblPSW250OutputStatus.Text = m.OutputOn ? "ON" : "OFF";
                                    lblPSW250OutputStatus.ForeColor = m.OutputOn ? Color.Green : Color.Gray;
                                    // 显示: 运行状态(控制优先级)，如 "CV(CVHS)" 或 "CC(CCHS)"
                                    lblPSW250ModeValue.Text = $"{m.RunState}({m.OutputMode})";
                                    lblPSW250ModeValue.ForeColor = m.RunState == "CC" ? Color.OrangeRed : Color.DodgerBlue;
                                }
                            });
                        }
                    }, TaskScheduler.Default);
                }

                // 等待所有任务完成（并行执行，不会互相阻塞）
                var tasks = new List<Task>();
                if (aps7100Task != null) tasks.Add(aps7100Task);
                if (psw250Task != null) tasks.Add(psw250Task);
                if (tasks.Count > 0)
                {
                    await Task.WhenAll(tasks);
                }
            }
            catch { }
            finally
            {
                _isMeasuring = false;
            }
        }

        #endregion

        #region Menu Events

        private void menuSettings_Click(object sender, EventArgs e)
        {
            using (var form = new SettingsForm())
            {
                if (form.ShowDialog() == DialogResult.OK)
                {
                    _appSettings = _configService.LoadAppSettings();
                    UpdateModbusStatus();
                }
            }
        }

        private void menuExit_Click(object sender, EventArgs e)
        {
            this.Close();
        }

        private void menuManualTestAPS7100_Click(object sender, EventArgs e)
        {
            if (_manualTestFormAPS7100 == null || _manualTestFormAPS7100.IsDisposed)
            {
                // 暂停主窗口测量定时器，避免与手动测试冲突
                // ⚠ APS7100 收到任何 SCPI 命令后会自动进入远程模式
                _measureTimer.Stop();
                LogMessage("ℹ 主窗口测量已暂停（手动测试窗口已打开）");
                
                _manualTestFormAPS7100 = new ManualTestForm(_controllerAPS7100, DeviceType.APS7100);
                
                // 设置 Modbus 轮询控制回调
                _manualTestFormAPS7100.OnSuspendModbusPolling = () =>
                {
                    _modbusService?.SuspendPolling();
                    LogMessage("ℹ Modbus 服务轮询已暂停");
                };
                _manualTestFormAPS7100.OnResumeModbusPolling = () =>
                {
                    _modbusService?.ResumePolling();
                    LogMessage("ℹ Modbus 服务轮询已恢复");
                };
                
                _manualTestFormAPS7100.FormClosed += (s, args) =>
                {
                    // 手动测试窗口关闭后，恢复主窗口测量和 Modbus 轮询
                    _modbusService?.ResumePolling();
                    if (_deviceAPS7100?.IsConnected == true || _devicePSW250?.IsConnected == true)
                    {
                        _measureTimer.Start();
                        LogMessage("ℹ 主窗口测量已恢复");
                    }
                };
                _manualTestFormAPS7100.Show();
            }
            else
            {
                _manualTestFormAPS7100.Focus();
            }
        }

        private void menuManualTestPSW250_Click(object sender, EventArgs e)
        {
            if (_manualTestFormPSW250 == null || _manualTestFormPSW250.IsDisposed)
            {
                // 暂停主窗口测量定时器，避免与手动测试冲突
                _measureTimer.Stop();
                LogMessage("ℹ 主窗口测量已暂停（手动测试窗口已打开）");
                
                _manualTestFormPSW250 = new ManualTestForm(_controllerPSW250, DeviceType.PSW250);
                
                // 设置 Modbus 轮询控制回调
                _manualTestFormPSW250.OnSuspendModbusPolling = () =>
                {
                    _modbusService?.SuspendPolling();
                    LogMessage("ℹ Modbus 服务轮询已暂停");
                };
                _manualTestFormPSW250.OnResumeModbusPolling = () =>
                {
                    _modbusService?.ResumePolling();
                    LogMessage("ℹ Modbus 服务轮询已恢复");
                };
                
                _manualTestFormPSW250.FormClosed += (s, args) =>
                {
                    // 手动测试窗口关闭后，恢复主窗口测量和 Modbus 轮询
                    _modbusService?.ResumePolling();
                    if (_deviceAPS7100?.IsConnected == true || _devicePSW250?.IsConnected == true)
                    {
                        _measureTimer.Start();
                        LogMessage("ℹ 主窗口测量已恢复");
                    }
                };
                _manualTestFormPSW250.Show();
            }
            else
            {
                _manualTestFormPSW250.Focus();
            }
        }

        private void menuModbusConfig_Click(object sender, EventArgs e)
        {
            using (var form = new ModbusConfigForm(_modbusMappings))
            {
                if (form.ShowDialog() == DialogResult.OK)
                {
                    _modbusMappings = form.Mappings;

                    // 确定配置文件路径
                    string configPath;
                    if (!string.IsNullOrEmpty(form.LastLoadedFilePath))
                    {
                        // 使用导入的配置文件路径
                        configPath = form.LastLoadedFilePath;
                    }
                    else if (!string.IsNullOrEmpty(_appSettings.ModbusConfigPath))
                    {
                        // 使用之前保存的路径
                        configPath = _appSettings.ModbusConfigPath;
                    }
                    else
                    {
                        // 使用默认路径
                        configPath = ConfigService.DefaultModbusConfigPath;
                    }

                    // 自动保存配置到文件
                    try
                    {
                        _configService.SaveModbusConfig(configPath, _modbusMappings);
                        _appSettings.ModbusConfigPath = configPath;
                        _configService.SaveAppSettings(_appSettings);
                        LogMessage($"✓ Modbus 配置已保存: {configPath} ({_modbusMappings.Count} 条规则)");
                    }
                    catch (Exception ex)
                    {
                        LogMessage($"⚠ 保存配置文件失败: {ex.Message}");
                        MessageBox.Show($"保存配置文件失败: {ex.Message}\n配置仅在本次运行有效。",
                            "警告", MessageBoxButtons.OK, MessageBoxIcon.Warning);
                    }

                    UpdateModbusStatus();

                    // 如果 Modbus 服务正在运行，提示用户重启
                    if (_modbusService != null && _modbusService.IsRunning)
                    {
                        if (MessageBox.Show("配置已更新，是否重启 Modbus 服务以使更改生效？",
                            "提示", MessageBoxButtons.YesNo, MessageBoxIcon.Question) == DialogResult.Yes)
                        {
                            StopModbusService();
                            StartModbusService();
                        }
                    }
                }
            }
        }

        private void menuModbusStart_Click(object sender, EventArgs e)
        {
            ToggleModbusService();
        }

        private void menuModbusSimulation_Click(object sender, EventArgs e)
        {
            bool isSimulation = menuModbusSimulation.Checked;

            if (_modbusService != null)
            {
                _modbusService.SimulationMode = isSimulation;
            }

            if (isSimulation)
            {
                LogMessage("✓ 仿真模式已开启 - 设备未连接时也会生成命令（仅记录，不发送）");
            }
            else
            {
                LogMessage("✗ 仿真模式已关闭 - 仅在设备连接时发送命令");
            }
        }

        private void menuModbusRegisterViewer_Click(object sender, EventArgs e)
        {
            if (_modbusService == null || !_modbusService.IsRunning)
            {
                MessageBox.Show("请先启动 Modbus 服务后再查看寄存器。", "提示", 
                    MessageBoxButtons.OK, MessageBoxIcon.Information);
                return;
            }

            using (var form = new RegisterViewerForm(_modbusService))
            {
                form.ShowDialog(this);
            }
        }

        #endregion

        #region Modbus Service

        private void ToggleModbusService()
        {
            if (_modbusService != null && _modbusService.IsRunning)
            {
                StopModbusService();
            }
            else
            {
                StartModbusService();
            }
        }

        private void StartModbusService()
        {
            if (_modbusService != null && _modbusService.IsRunning) return;

            if (_modbusMappings.Count == 0)
            {
                LogMessage("Modbus 配置为空，无法启动服务");
                return;
            }

            try
            {
                // 传入两个控制器，支持同时控制两个设备
                _modbusService = new ModbusTcpServerService(_controllerAPS7100, _controllerPSW250);
                _modbusService.OnLog += (msg) =>
                {
                    if (!this.IsDisposed && this.IsHandleCreated)
                    {
                        this.Invoke((MethodInvoker)delegate { LogMessage(msg); });
                    }
                };

                // 订阅客户端状态变化事件
                _modbusService.OnClientStatusChanged += (clientCount, requestCount, lastRequest) =>
                {
                    if (!this.IsDisposed && this.IsHandleCreated)
                    {
                        this.Invoke((MethodInvoker)delegate
                        {
                            UpdateModbusClientStatus(clientCount, requestCount, lastRequest);
                        });
                    }
                };

                // 设置心跳寄存器地址
                _modbusService.SetHeartbeatAddresses(
                    _appSettings.HeartbeatRegisterAddress,
                    _appSettings.DeviceStatusRegisterAddress);

                // 立即更新设备状态
                bool aps7100Connected = _deviceAPS7100?.IsConnected == true;
                bool psw250Connected = _devicePSW250?.IsConnected == true;
                _modbusService.UpdateDeviceStatus(aps7100Connected, psw250Connected);

                // 设置仿真模式状态
                _modbusService.SimulationMode = menuModbusSimulation.Checked;

                // 获取绑定IP，如果为空则使用0.0.0.0（所有接口）
                string bindIp = string.IsNullOrEmpty(_appSettings.ModbusBindIpAddress) 
                    ? "0.0.0.0" 
                    : _appSettings.ModbusBindIpAddress;
                
                _modbusService.Start(bindIp, _appSettings.ModbusPort, _modbusMappings);

                string bindInfo = bindIp == "0.0.0.0" ? "所有接口" : bindIp;
                LogMessage($"Modbus TCP 服务已启动，绑定: {bindInfo}:{_appSettings.ModbusPort}");
                LogMessage($"  心跳寄存器地址: {_appSettings.HeartbeatRegisterAddress}");
                LogMessage($"  设备状态寄存器地址: {_appSettings.DeviceStatusRegisterAddress}");
            }
            catch (Exception ex)
            {
                LogMessage($"启动 Modbus 服务失败: {ex.Message}");
                _modbusService?.Stop();
                _modbusService = null;
            }

            UpdateModbusStatus();
        }

        private void StopModbusService()
        {
            if (_modbusService == null) return;

            _modbusService.Stop();
            _modbusService.Dispose();
            _modbusService = null;
            LogMessage("Modbus TCP 服务已停止");
            UpdateModbusStatus();
        }

        #endregion

        #region Helper Methods

        private void UpdateManualTestController(DeviceType deviceType)
        {
            if (deviceType == DeviceType.APS7100)
            {
                _manualTestFormAPS7100?.UpdateController(_controllerAPS7100);
            }
            else
            {
                _manualTestFormPSW250?.UpdateController(_controllerPSW250);
            }
        }

        private void btnClearLog_Click(object sender, EventArgs e) => txtLog.Clear();

        private void LogMessage(string msg)
        {
            if (this.InvokeRequired)
            {
                this.Invoke(new Action<string>(LogMessage), msg);
                return;
            }
            txtLog.AppendText($"[{DateTime.Now:HH:mm:ss}] {msg}\r\n");
        }

        protected override void OnFormClosing(FormClosingEventArgs e)
        {
            // 如果是用户点击关闭按钮，最小化到托盘而不是退出
            if (e.CloseReason == CloseReason.UserClosing)
            {
                e.Cancel = true;
                this.WindowState = FormWindowState.Minimized;
                return;
            }

            // 真正退出时清理资源
            CleanupResources();

            if (notifyIcon != null)
            {
                notifyIcon.Visible = false;
                notifyIcon.Dispose();
            }

            base.OnFormClosing(e);
        }

        #endregion
    }
}