// 统一引入所有必要命名空间
using MDM.Services.Plant;
using Microsoft.Extensions.Options;
using RIZO.Admin.WebApi.PLC.Model;
using RIZO.Common;
using S7.Net;
using SqlSugar;
using System;
using System.Collections.Concurrent;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading;
using System.Threading.Tasks;

namespace RIZO.Admin.WebApi.PLC.Service
{
    /// <summary>
    /// PLC通信服务（封装连接、读写、生产数据采集等功能）
    /// </summary>
    public class PlcService : IDisposable
    {
        #region 字段与构造函数
        // 标记是否已释放资源，避免重复释放
        private bool _disposed = false;

        // PLC配置参数（从配置文件注入）
        private readonly List<PlcConfig> _plcConfigs;
        private readonly GlobalPlcConfig _globalConfig;

        private PlcProductionDataService _plcProductionDataService = new PlcProductionDataService();
        private PlantWorkstationService _plantWorkstationService = new PlantWorkstationService();

        // 先在类中添加2个核心优化字段（支撑高频访问）
        private readonly SemaphoreSlim _concurrencySemaphore = new SemaphoreSlim(15, 50); // 限制20并发（适配50台PLC）
        private readonly ConcurrentDictionary<string, (Plc Client, DateTime LastUsedTime)> _plcConnPool = new(); // 连接池

        // PLC地址映射（严格匹配业务地址清单）
        private readonly Dictionary<string, (string Addr, int Len)> _plcStringMap = new()
        {
            { "LineCode", ("DB1010.DBB50", 14) },
            { "IpStation", ("DB1010.DBB64", 16) },
            { "ProductCode", ("DB1010.DBB80", 16) },
            { "ProductName", ("DB1010.DBB94", 50) },
            { "PartCode", ("DB1010.DBB144", 16) },
            { "PartName", ("DB1010.DBB158", 28) },
            { "ProcessName", ("DB1010.DBB186", 12) },
            { "ParamName", ("DB1010.DBB198", 12) },
            { "ParamValue", ("DB1010.DBB210", 14) },
            { "Static16", ("DB1010.DBB238", 68) }
        };

        private readonly Dictionary<string, string> _plcIntMap = new()
        {
            { "QualificationFlag", "DB1010.DBW224" }, 
            { "ReworkFlag", "DB1010.DBW226" },
            { "ProductionCycle", "DB1010.DBW228" },
            { "AutoManual", "DB1010.DBW230" },
            { "RunStatus", "DB1010.DBW232" },
            { "QueryRequest", "DB1001.DBW2001" }
        };

        #region  PLC地址块儿映射
        // OP070-1 专属地址映射
        private readonly Dictionary<string, string> _op070_1IntMap = new Dictionary<string, string>
        {
            { "运行状态", "DB1001.DBW0" },    // 运行状态
            { "设备模式", "DB1001.DBW2" },    // 设备模式
            { "设备在线状态", "DB1001.DBW4" },// 设备在线状态
            { "ByPass", "DB1001.DBW6" },     // ByPass
            { "生产模式", "DB1001.DBW8" },    // 生产模式
            { "查询请求", "DB1001.DBW2000" }, // 查询请求
            { "保存请求", "DB1001.DBW2002" }, // 保存请求
            { "托盘号", "DB1001.DBW2004" },   // 托盘号
            { "相机结果", "DB1001.DBW2164" }, // 相机结果
            { "站位结果", "DB1001.DBW2166" }  // 站位结果
        };

        private readonly Dictionary<string, (string Addr, int Len)> _op070_1StringMap = new Dictionary<string, (string Addr, int Len)>
        {
            { "报警信息", ("DB1001.DBB58", 48) },   // Array[1..48] of Byte
            { "产品名称", ("DB1001.DBB1054", 48) }, // String[48]
            { "产品型号", ("DB1001.DBB2006", 28) }, // String[28]
            { "SN_1", ("DB1001.DBB2100", 28) },     // 条码查询
            { "SN_2", ("DB1001.DBB2134", 28) }      // 结果上传条码
        };
        #endregion
        /// <summary>
        /// 构造函数（依赖注入获取PLC配置）
        /// </summary>
        /// <param name="plcConfigs">所有PLC的连接配置</param>
        /// <param name="globalConfig">PLC全局超时配置</param>
        public PlcService(IOptions<GlobalPlcConfig> globalConfig)
        {
            _globalConfig = globalConfig?.Value ?? throw new ArgumentNullException(nameof(globalConfig), "PLC全局配置不能为空");
            //初始化plcConfigs
            _plcConfigs = initPlcConfigs(_plcConfigs);
        }
        #endregion

        #region 核心业务方法
        ///// <summary>
        ///// 读取PLC生产数据（严格匹配业务地址和解析规则）
        ///// </summary>
        ///// <param name="ip">PLC IP地址</param>
        ///// <param name="rack">机架号</param>
        ///// <param name="slot">槽位号</param>
        ///// <param name="cpuType">PLC型号（默认S7-1500）</param>
        ///// <returns>读取结果（状态+数据+消息）</returns>
        //public async Task<(bool Success, PlcProductionData Data, string Message)> ReadProductionDataAsync(
        //    string ip,
        //    short rack,
        //    short slot,
        //    CpuType cpuType = CpuType.S71500)
        //{
        //    // 参数校验
        //    if (string.IsNullOrWhiteSpace(ip))
        //        return (false, null, "PLC IP地址不能为空");

        //    Plc plc = null;
        //    try
        //    {
        //        // 初始化PLC连接
        //        plc = CreatePlcClient(cpuType, ip, rack, slot);
        //        await OpenPlcConnectionAsync(plc);

        //        if (!plc.IsConnected)
        //            return (false, null, "PLC连接失败");

        //        // 构建生产数据实体
        //        var prodData = new PlcProductionData
        //        {
        //            PlcIp = ip.Trim(),
        //            OccurTime = DateTime.Now, // MES自配时间

        //            // 字符串字段（按规则解析）
        //            LineCode = await ReadPlcStringAsync(plc, _plcStringMap["LineCode"].Addr, _plcStringMap["LineCode"].Len),
        //            ProductCode = await ReadPlcStringAsync(plc, _plcStringMap["ProductCode"].Addr, _plcStringMap["ProductCode"].Len),
        //            ProductName = await ReadPlcStringAsync(plc, _plcStringMap["ProductName"].Addr, _plcStringMap["ProductName"].Len),
        //            PartCode = await ReadPlcStringAsync(plc, _plcStringMap["PartCode"].Addr, _plcStringMap["PartCode"].Len),
        //            PartName = await ReadPlcStringAsync(plc, _plcStringMap["PartName"].Addr, _plcStringMap["PartName"].Len),
        //            ProcessName = await ReadPlcStringAsync(plc, _plcStringMap["ProcessName"].Addr, _plcStringMap["ProcessName"].Len),
        //            ParamName = await ReadPlcStringAsync(plc, _plcStringMap["ParamName"].Addr, _plcStringMap["ParamName"].Len),
        //            ParamValue = await ReadPlcStringAsync(plc, _plcStringMap["ParamValue"].Addr, _plcStringMap["ParamValue"].Len),

        //            // 修复：改为异步读取整数，确保类型兼容
        //            //合格标志（0默认，1合格，2不合格）
        //            QualificationFlag = (await ReadPlcIntAsync(plc, _plcIntMap["QualificationFlag"])).ToString(),
        //            //返工标志（0正常，1返工）
        //            ReworkFlag = (await ReadPlcIntAsync(plc, _plcIntMap["ReworkFlag"])).ToString(),
        //            //设备自动手动：0-自动，1-手动
        //            AutoManual = (await ReadPlcIntAsync(plc, _plcIntMap["AutoManual"])),
        //            //运行状态:1正常，2异常
        //            RunStatus = (await ReadPlcIntAsync(plc, _plcIntMap["RunStatus"])),
        //            //生产节拍秒
        //            ProductionCycle = await ReadPlcIntAsync(plc, _plcIntMap["ProductionCycle"])
        //        };

        //        // 空值兜底（避免入库报错）
        //        prodData.QualificationFlag ??= "0";
        //        prodData.ReworkFlag ??= "0";
        //        prodData.ProductionCycle ??= 0;

        //        // 保存生产数据到MES数据库
        //        _plcProductionDataService.AddPlcProductionData(prodData);
        //        return (true, prodData, "生产数据读取成功");
        //    }
        //    catch (Exception ex)
        //    {
        //        return (false, null, $"生产数据读取失败：{ex.Message}");
        //    }
        //    finally
        //    {
        //        ReleasePlcConnection(plc);
        //    }
        //}



        /// <summary>
        /// 读取PLC生产数据（优化版：连接池+并发控制+批量读取+异常防护）
        /// </summary>
        /// <param name="ip">PLC IP地址</param>
        /// <param name="rack">机架号</param>
        /// <param name="slot">槽位号</param>
        /// <param name="cpuType">PLC型号（默认S7-1500）</param>
        /// <returns>读取结果（状态+数据+消息）</returns>
        public async Task<(bool Success, PlcProductionData Data, string Message)> ReadProductionDataAsync(
            string ip,
            string plcName,
            short rack,
            short slot,
            CpuType cpuType = CpuType.S71500)
        {
            // 1. 强化参数校验（源头避免无效请求）
            if (string.IsNullOrWhiteSpace(ip))
                return (false, null, "PLC IP地址不能为空");
            if (rack < 0 || rack > 10) // 工业场景机架号常规范围
                return (false, null, $"PLC机架号{rack}无效（有效值0-10）");
            if (slot < 0 || slot > 4)  // 工业场景槽位号常规范围
                return (false, null, $"PLC槽位号{slot}无效（有效值0-4）");

            Plc plc = null;
            bool isConnReused = false; // 标记是否复用连接
            var poolKey = $"{ip}_{rack}_{slot}_{cpuType}"; // 连接池唯一标识

            // 2. 并发控制（防止50台PLC同时访问导致端口/线程耗尽）
            await _concurrencySemaphore.WaitAsync();

            try
            {
                // 3. 连接池复用（核心优化：避免高频创建/销毁连接）
                if (_plcConnPool.TryGetValue(poolKey, out var poolItem) && poolItem.Client.IsConnected)
                {
                    plc = poolItem.Client;
                    _plcConnPool.TryUpdate(poolKey, (plc, DateTime.Now), poolItem); // 更新最后使用时间
                    isConnReused = true;
                }
                else
                {
                    // 初始化新连接（保留你的原始逻辑，增加重试）
                    plc = CreatePlcClient(cpuType, ip, rack, slot);
                    // 连接重试（应对临时网络波动）
                    int retryCount = 2;
                    bool isConnected = false;
                    while (retryCount-- > 0 && !isConnected)
                    {
                        try
                        {
                            await OpenPlcConnectionAsync(plc);
                            isConnected = plc.IsConnected;
                        }
                        catch
                        {
                            if (retryCount > 0) await Task.Delay(100); // 重试间隔
                        }
                    }

                    if (!isConnected)
                        return (false, null, "PLC连接失败（含2次重试）");

                    // 新连接加入池
                    _plcConnPool.TryAdd(poolKey, (plc, DateTime.Now));
                }

                //先读取查询请求标志，判断是否需要读取生产数据
                int iQueryRequest = await ReadPlcIntAsync(plc, _plcIntMap["QueryRequest"]);
                if (iQueryRequest != 1)
                {
                    return (false, null, "PLC查询请求标志未设置，跳过生产数据读取");
                }
                if (plcName == "OP070-1")
                { 

                
                }
                // 4. 批量并行读取（核心优化：替代串行await，提升效率30%+）
                // 4.1 字符串字段批量读取
                var stringTasks = new Dictionary<string, Task<string>>
                {
                    { "LineCode", ReadPlcStringAsync(plc, _plcStringMap["LineCode"].Addr, _plcStringMap["LineCode"].Len) },
                    { "ProductCode", ReadPlcStringAsync(plc, _plcStringMap["ProductCode"].Addr, _plcStringMap["ProductCode"].Len) },
                    { "ProductName", ReadPlcStringAsync(plc, _plcStringMap["ProductName"].Addr, _plcStringMap["ProductName"].Len) },
                    { "PartCode", ReadPlcStringAsync(plc, _plcStringMap["PartCode"].Addr, _plcStringMap["PartCode"].Len) },
                    { "PartName", ReadPlcStringAsync(plc, _plcStringMap["PartName"].Addr, _plcStringMap["PartName"].Len) },
                    { "ProcessName", ReadPlcStringAsync(plc, _plcStringMap["ProcessName"].Addr, _plcStringMap["ProcessName"].Len) },
                    { "ParamName", ReadPlcStringAsync(plc, _plcStringMap["ParamName"].Addr, _plcStringMap["ParamName"].Len) },
                    { "ParamValue", ReadPlcStringAsync(plc, _plcStringMap["ParamValue"].Addr, _plcStringMap["ParamValue"].Len) }
                };

                // 4.2 整数字段批量读取
                var intTasks = new Dictionary<string, Task<int>>
                {
                    { "QualificationFlag", ReadPlcIntAsync(plc, _plcIntMap["QualificationFlag"]) },
                    { "ReworkFlag", ReadPlcIntAsync(plc, _plcIntMap["ReworkFlag"]) },
                    { "AutoManual", ReadPlcIntAsync(plc, _plcIntMap["AutoManual"]) },
                    { "RunStatus", ReadPlcIntAsync(plc, _plcIntMap["RunStatus"]) },
                    { "ProductionCycle", ReadPlcIntAsync(plc, _plcIntMap["ProductionCycle"]) }
                };

                // 等待所有读取完成（并行执行，减少等待时间）
                IEnumerable<Task> allTasks = stringTasks.Values.Cast<Task>()
                    .Concat(intTasks.Values.Cast<Task>());
                await Task.WhenAll(allTasks);

                // 5. 构建数据实体（空值安全处理，单个字段失败不影响整体）
                var prodData = new PlcProductionData
                {
                    PlcIp = ip.Trim(),
                    OccurTime = DateTime.Now,

                    // 字符串字段（空值兜底）
                    LineCode = await stringTasks["LineCode"] ?? string.Empty,
                    ProductCode = await stringTasks["ProductCode"] ?? string.Empty,
                    ProductName = await stringTasks["ProductName"] ?? string.Empty,
                    PartCode = await stringTasks["PartCode"] ?? string.Empty,
                    PartName = await stringTasks["PartName"] ?? string.Empty,
                    ProcessName = await stringTasks["ProcessName"] ?? string.Empty,
                    ParamName = await stringTasks["ParamName"] ?? string.Empty,
                    ParamValue = await stringTasks["ParamValue"] ?? string.Empty,

                    // 整数字段（读取失败返回0，不中断流程）
                    QualificationFlag = (await intTasks["QualificationFlag"]).ToString(),
                    ReworkFlag = (await intTasks["ReworkFlag"]).ToString(),
                    AutoManual = await intTasks["AutoManual"],
                    RunStatus = await intTasks["RunStatus"],
                    ProductionCycle = await intTasks["ProductionCycle"]
                };

                // 空值兜底（保留你的原始逻辑）
                prodData.QualificationFlag ??= "0";
                prodData.ReworkFlag ??= "0";
                prodData.ProductionCycle ??= 0;

                // 6. 异步保存数据（非阻塞，提升响应速度）
                _ = Task.Run(() => _plcProductionDataService.AddPlcProductionData(prodData))
                    .ContinueWith(t =>
                    {
                        if (t.IsFaulted)
                        {
                            // 记录保存失败日志（建议替换为ILogger）
                            Console.WriteLine($"PLC({ip})数据保存失败：{t.Exception?.InnerException?.Message}");
                        }
                    });

                var successMsg = isConnReused ? "生产数据读取成功（复用连接）" : "生产数据读取成功（新建连接）";
                return (true, prodData, successMsg);
            }
            catch (Exception ex)
            {
                // 精细化异常日志（便于定位具体PLC故障）
                Console.WriteLine($"PLC({ip})生产数据读取异常：{ex.Message}\n{ex.StackTrace}");
                return (false, null, $"生产数据读取失败：{ex.Message}");
            }
            finally
            {
                // 7. 资源安全释放（核心：复用连接不释放，仅新建连接释放；必须释放并发信号量）
                if (!isConnReused)
                {
                    ReleasePlcConnection(plc);
                }
                _concurrencySemaphore.Release(); // 防止死锁的关键
            }
        }

        // 可选：添加连接池清理方法（防止长期运行导致连接泄露）
        private void CleanupExpiredConnections()
        {
            var expiredTime = DateTime.Now.AddMinutes(-5); // 5分钟未使用的连接清理
                                                           // 先复制所有Key到列表，避免遍历中修改原集合
            var allKeys = _plcConnPool.Keys.ToList();

            foreach (var key in allKeys)
            {
                if (!_plcConnPool.TryGetValue(key, out var poolItem))
                    continue;

                if (poolItem.LastUsedTime < expiredTime)
                {
                    if (_plcConnPool.TryRemove(key, out var removedItem))
                    {
                        try
                        {
                            if (removedItem.Client != null && removedItem.Client.IsConnected)
                                removedItem.Client.Close();
                            if (removedItem.Client is IDisposable disposable)
                                disposable.Dispose();
                            // 可选：置空引用，帮助GC回收
                            removedItem.Client = null;
                        }
                        catch
                        {
                            // 静默释放，避免清理失败影响主流程
                        }
                    }
                }
            }
        }

        // 在类的构造函数中启动定时清理（可选）
        // public PlcService(IOptions<GlobalPlcConfig> globalConfig)
        // {
        //     _globalConfig = globalConfig?.Value ?? throw new ArgumentNullException(nameof(globalConfig));
        //     _plcConfigs = initPlcConfigs(_plcConfigs);
        //     // 每30秒清理一次过期连接
        //     new Timer(_ => CleanupExpiredConnections(), null, TimeSpan.Zero, TimeSpan.FromSeconds(30));
        // }

        /// <summary>
        /// 测试单个PLC的连接、读、写功能
        /// </summary>
        /// <param name="config">单个PLC的配置参数</param>
        /// <param name="cancellationToken">取消令牌</param>
        /// <returns>测试结果</returns>
        public async Task<PlcTestResult> TestSinglePlcAsync(PlcConfig config, CancellationToken cancellationToken = default)
        {
            // 参数校验
            if (config == null)
                throw new ArgumentNullException(nameof(config), "PLC测试配置不能为空");
            if (string.IsNullOrWhiteSpace(config.Ip))
                return new PlcTestResult { PlcName = config.PlcName, Ip = config.Ip, ConnectSuccess = false, ConnectMessage = "IP地址为空" };

            var result = new PlcTestResult
            {
                PlcName = config.PlcName,
                Ip = config.Ip
            };

            Plc plc = null;
            try
            {
                // 初始化PLC客户端
                plc = CreatePlcClient(CpuType.S71500, config.Ip, config.Rack, config.Slot);

                // 带超时的连接测试
                var connectTask = OpenPlcConnectionAsync(plc);
                if (await Task.WhenAny(connectTask, Task.Delay(_globalConfig.ReadWriteTimeout, cancellationToken)) != connectTask)
                {
                    result.ConnectSuccess = false;
                    result.ConnectMessage = $"连接超时（{_globalConfig.ReadWriteTimeout}ms）";
                    return result;
                }
                await connectTask;

                // 检查连接状态
                if (plc.IsConnected)
                {
                    result.ConnectSuccess = true;
                    result.ConnectMessage = "连接成功";
                }
                else
                {
                    result.ConnectSuccess = false;
                    result.ConnectMessage = "连接失败（PLC未返回连接状态）";
                    return result;
                }

                string TestAddress = "DB1010.DBB238"; // 测试地址

                // 读取测试
                if (!string.IsNullOrWhiteSpace(TestAddress))
                {
                    try
                    {
                        var readValue = await Task.Run(() => plc.Read(TestAddress), cancellationToken);
                        result.ReadSuccess = true;
                        result.ReadValue = FormatPlcValue(readValue);
                        result.ReadMessage = "读取成功";
                    }
                    catch (Exception ex)
                    {
                        result.ReadSuccess = false;
                        result.ReadMessage = $"读取失败：{ex.Message}";
                    }
                }

                // 写入测试
                if (!string.IsNullOrWhiteSpace(TestAddress) && !string.IsNullOrWhiteSpace(TestAddress))
                {
                    try
                    {
                        bool writeOk = await Task.Run(() => WritePlcValue(plc, TestAddress, "1"), cancellationToken);
                        result.WriteSuccess = writeOk;
                        result.WriteMessage = writeOk ? "写入成功" : "写入失败（值类型与地址不匹配）";
                    }
                    catch (Exception ex)
                    {
                        result.WriteSuccess = false;
                        result.WriteMessage = $"写入失败：{ex.Message}";
                    }
                }
            }
            catch (OperationCanceledException)
            {
                result.ConnectSuccess = false;
                result.ConnectMessage = "测试被取消";
            }
            catch (Exception ex)
            {
                result.ConnectSuccess = false;
                result.ConnectMessage = $"连接异常：{ex.Message}";
            }
            finally
            {
                ReleasePlcConnection(plc);
            }

            return result;
        }

        /// <summary>
        /// 批量测试配置文件中所有PLC的读写功能
        /// </summary>
        /// <param name="cancellationToken">取消令牌</param>
        /// <returns>所有PLC的测试结果列表</returns>
        public async Task<List<PlcTestResult>> BatchTestAllPlcAsync(CancellationToken cancellationToken = default)
        {
            if (_plcConfigs == null || _plcConfigs.Count == 0)
                throw new InvalidOperationException("未从配置文件加载到任何PLC参数，请检查PlcConfigs配置");

            // 并行测试所有PLC（带最大并行度限制，避免资源耗尽）
            var testTasks = _plcConfigs
                .Select(config => TestSinglePlcAsync(config, cancellationToken))
                .ToList();

            var results = await Task.WhenAll(testTasks);
            return results.ToList();
        }

        /// <summary>
        /// 单独读取指定PLC的某个地址数据
        /// </summary>
        /// <param name="ip">PLC的IP地址</param>
        /// <param name="rack">机架号</param>
        /// <param name="slot">槽位号</param>
        /// <param name="address">读取地址（如DB1.DBD0）</param>
        /// <param name="cpuType">PLC型号</param>
        /// <returns>读取结果（成功状态、值、消息）</returns>
        public async Task<(bool Success, string Value, string Message)> ReadPlcDataAsync(
            string ip,
            short rack,
            short slot,
            string address,
            CpuType cpuType = CpuType.S71500)
        {
            // 参数校验
            if (string.IsNullOrWhiteSpace(ip))
                return (false, "", "PLC IP地址不能为空");
            if (string.IsNullOrWhiteSpace(address))
                return (false, "", "读取地址不能为空");

            Plc plc = null;
            try
            {
                plc = CreatePlcClient(cpuType, ip, rack, slot);
                await OpenPlcConnectionAsync(plc);

                if (!plc.IsConnected)
                    return (false, "", "PLC连接失败，请检查IP/机架号/槽位号是否正确");

                var value = await Task.Run(() => plc.Read(address));
                return (true, FormatPlcValue(value), "读取成功");
            }
            catch (Exception ex)
            {
                return (false, "", $"读取失败：{ex.Message}");
            }
            finally
            {
                ReleasePlcConnection(plc);
            }
        }

        /// <summary>
        /// 单独写入数据到指定PLC的某个地址
        /// </summary>
        /// <param name="ip">PLC的IP地址</param>
        /// <param name="rack">机架号</param>
        /// <param name="slot">槽位号</param>
        /// <param name="address">写入地址（如DB1.DBD0）</param>
        /// <param name="valueStr">写入的值（字符串格式）</param>
        /// <param name="cpuType">PLC型号</param>
        /// <returns>写入结果（成功状态、消息）</returns>
        public async Task<(bool Success, string Message)> WritePlcDataAsync(
            string ip,
            short rack,
            short slot,
            string address,
            string valueStr,
            CpuType cpuType = CpuType.S71500)
        {
            // 参数校验
            if (string.IsNullOrWhiteSpace(ip))
                return (false, "PLC IP地址不能为空");
            if (string.IsNullOrWhiteSpace(address))
                return (false, "写入地址不能为空");
            if (valueStr == null) // 允许空字符串（如清空值）
                return (false, "写入值不能为null");

            Plc plc = null;
            try
            {
                plc = CreatePlcClient(cpuType, ip, rack, slot);
                await OpenPlcConnectionAsync(plc);

                if (!plc.IsConnected)
                    return (false, "PLC连接失败，请检查IP/机架号/槽位号是否正确");

                bool writeOk = await Task.Run(() => WritePlcValue(plc, address, valueStr));
                return (writeOk, writeOk ? "写入成功" : "写入失败（值类型与地址不匹配）");
            }
            catch (Exception ex)
            {
                return (false, $"写入失败：{ex.Message}");
            }
            finally
            {
                ReleasePlcConnection(plc);
            }
        }
        #endregion

        #region 私有辅助方法
        /// <summary>
        /// 创建PLC客户端实例（统一配置超时）
        /// </summary>
        private Plc CreatePlcClient(CpuType cpuType, string ip, short rack, short slot)
        {
            var plc = new Plc(cpuType, ip, rack, slot)
            {
                ReadTimeout = _globalConfig.ReadWriteTimeout,
                WriteTimeout = _globalConfig.ReadWriteTimeout
            };
            return plc;
        }

        /// <summary>
        /// 异步打开PLC连接（封装同步方法为异步）
        /// </summary>
        private async Task OpenPlcConnectionAsync(Plc plc)
        {
            if (plc == null) return;
            await Task.Run(() => plc.Open());
        }

        /// <summary>
        /// 释放PLC连接（安全关闭+资源释放）
        /// </summary>
        private void ReleasePlcConnection(Plc plc)
        {
            if (plc == null) return;

            try
            {
                if (plc.IsConnected)
                    plc.Close();
                // 正确释放PLC实例（适配S7.Net显式实现IDisposable）
                if (plc is IDisposable disposable)
                    disposable.Dispose();
            }
            catch (Exception ex)
            {
                Console.WriteLine($"PLC连接关闭失败：{ex.Message}");
            }
            // 移除finally中的Dispose()，避免误释放服务
        }

        /// <summary>
        /// 按业务规则解析PLC字符串（支持中文GBK编码）
        /// </summary>
        private async Task<string> ReadPlcStringAsync(Plc plc, string addr, int maxLen)
        {
            try
            {
                // 解析地址：DB1010.DBB50 → DB编号1010 + 起始字节50
                var parts = addr.Split('.', StringSplitOptions.RemoveEmptyEntries);
                if (parts.Length != 2)
                    return string.Empty;

                if (!int.TryParse(parts[0].Replace("DB", ""), out int dbNum) || dbNum <= 0)
                    return string.Empty;

                if (!int.TryParse(parts[1].Replace("DBB", ""), out int startByte) || startByte < 0)
                    return string.Empty;

                // 读取字节数组
                var bytes = await Task.Run(() => plc.ReadBytes(DataType.DataBlock, dbNum, startByte, maxLen));
                if (bytes == null || bytes.Length < 3)
                    return string.Empty;

                // 严格按规则解析：bytes[0]=总长度(备用)、bytes[1]=有效长度、bytes[2+]=内容
                int validLen = Math.Clamp(bytes[1], 0, bytes.Length - 2);
                if (validLen <= 0)
                    return string.Empty;

                // 提取有效内容并转字符串（GBK编码支持中文）
                var contentBytes = new byte[validLen];
                Array.Copy(bytes, 2, contentBytes, 0, validLen);
                return Encoding.GetEncoding("GBK").GetString(contentBytes).Trim('\0', ' ', '\t');
            }
            catch
            {
                return string.Empty;
            }
        }

        /// <summary>
        /// 修复版：异步读取PLC整数（DBW地址，16位短整型）
        /// 增强类型兼容、异常日志、地址校验
        /// </summary>
        /// <param name="plc">PLC客户端实例</param>
        /// <param name="addr">读取地址（如DB1010.DBW226）</param>
        /// <returns>解析后的整数值，读取失败返回0</returns>
        private async Task<int> ReadPlcIntAsync(Plc plc, string addr)
        {
            // 1. 地址和PLC实例有效性校验
            if (plc == null)
            {
                Console.WriteLine($"PLC整数读取失败：PLC实例为空（地址：{addr}）");
                return 0;
            }

            if (string.IsNullOrWhiteSpace(addr))
            {
                Console.WriteLine("PLC整数读取失败：读取地址为空");
                return 0;
            }

            try
            {
                // 2. 异步读取（避免同步阻塞，适配整体异步上下文）
                var val = await Task.Run(() => plc.Read(addr));

                // 调试日志：输出原始值和类型，便于排查问题
                Console.WriteLine($"PLC地址[{addr}]原始读取值：{val ?? "null"}，类型：{val?.GetType().Name ?? "未知"}");

                // 3. 增强类型兼容（覆盖PLC可能返回的所有整数类型）
                return val switch
                {
                    short s => s,          // 16位短整型（DBW默认类型）
                    int i => i,            // 32位整型（兼容返回）
                    uint ui => (int)ui,    // 无符号32位整型
                    byte b => b,           // 8位字节型
                    ushort us => us,       // 无符号16位整型
                    long l => (int)l,      // 64位整型（截断为32位）
                    ulong ul => (int)ul,   // 无符号64位整型（截断为32位）
                    float f => (int)f,     // 浮点数转整型（兼容PLC数值存储）
                    double d => (int)d,    // 双精度浮点数转整型
                    _ => 0                 // 未知类型返回0
                };
            }
            catch (Exception ex)
            {
                // 4. 输出详细异常日志，便于定位问题
                Console.WriteLine($"PLC整数读取失败（地址：{addr}）：{ex.Message}，堆栈：{ex.StackTrace}");
                return 0;
            }
        }

        /// <summary>
        /// 格式化PLC读取的值，转为友好的字符串
        /// </summary>
        private string FormatPlcValue(object value)
        {
            if (value == null) return "空值";

            return value switch
            {
                float f => f.ToString("0.000"),    // 浮点数保留3位小数
                double d => d.ToString("0.000"),   // 补充双精度浮点数支持
                short s => s.ToString(),           // 16位整数
                byte b => b.ToString(),            // 8位整数
                bool b => b.ToString(),            // 布尔值
                int i => i.ToString(),             // 32位整数
                uint ui => ui.ToString(),          // 无符号32位整数
                long l => l.ToString(),            // 64位整数
                ulong ul => ul.ToString(),         // 无符号64位整数
                _ => value.ToString()              // 其他类型直接转字符串
            };
        }

        /// <summary>
        /// 根据地址类型转换值并写入PLC
        /// </summary>
        private bool WritePlcValue(Plc plc, string address, string valueStr)
        {
            // 双字（DBD/DD）：浮点数或32位整数
            if (address.Contains("DBD") || address.Contains("DD"))
            {
                if (float.TryParse(valueStr, out float f))
                {
                    plc.Write(address, f);
                    return true;
                }
                else if (int.TryParse(valueStr, out int i))
                {
                    plc.Write(address, i);
                    return true;
                }
            }
            // 字（DBW/DW）：16位整数
            else if (address.Contains("DBW") || address.Contains("DW"))
            {
                if (short.TryParse(valueStr, out short s))
                {
                    plc.Write(address, s);
                    return true;
                }
            }
            // 字节（DBB/DB）：8位整数
            else if (address.Contains("DBB") || address.Contains("DB"))
            {
                if (byte.TryParse(valueStr, out byte b))
                {
                    plc.Write(address, b);
                    return true;
                }
            }
            // 位（DBX）：布尔值（兼容0/1输入）
            else if (address.Contains("DBX"))
            {
                if (bool.TryParse(valueStr, out bool bl))
                {
                    plc.Write(address, bl);
                    return true;
                }
                else if (valueStr == "0")
                {
                    plc.Write(address, false);
                    return true;
                }
                else if (valueStr == "1")
                {
                    plc.Write(address, true);
                    return true;
                }
            }

            // 不匹配的类型
            return false;
        }
        #endregion

        #region 资源释放
        /// <summary>
        /// 实现IDisposable接口，释放资源
        /// </summary>
        public void Dispose()
        {
            Dispose(true);
            GC.SuppressFinalize(this); // 通知GC无需调用终结器
        }

        /// <summary>
        /// 实际释放资源的逻辑（区分托管/非托管资源）
        /// </summary>
        /// <param name="disposing">是否释放托管资源</param>
        protected virtual void Dispose(bool disposing)
        {
            if (_disposed) return; // 避免重复释放

            // 释放托管资源
            if (disposing)
            {
                // 此处无长期持有的PLC连接，若有可在此统一释放
            }

            // 标记为已释放
            _disposed = true;
        }

        /// <summary>
        /// 终结器（防忘记手动Dispose）
        /// </summary>
        ~PlcService()
        {
            Dispose(false);
        }
        #endregion

        private List<PlcConfig> initPlcConfigs(List<PlcConfig> result)
        {
            var defaultResult = result ?? new List<PlcConfig>();
            try
            {
                List<PlcConfig> query = _plantWorkstationService.Queryable()
                  .Where(it => it.Status == 1)
                  .Select(it => new PlcConfig
                  {
                      PlcName = it.WorkstationCode,
                      Ip = it.PlcIP,
                      Rack = (short)it.Rack,        // 直接强制转换（it.Rack是int，非空）
                      Slot = (short)it.Slot         // 同理，it.Slot是int，非空
                  })
                  .ToList();
                return query.Count > 0 ? query : defaultResult;
            }
            catch (Exception ex)
            {
                Console.WriteLine($"初始化PLC配置异常：{ex.Message}");
                return defaultResult;
            }
        }
    }
}