ASTM-D7896-19TransientHot-Wire-Method/ViewModels/D7896ViewModel.cs

using ASTM_D7896_Tester.Helpers;
using ASTM_D7896_Tester.Models;
using ASTM_D7896_Tester.Services;
using CommunityToolkit.Mvvm.ComponentModel;
using CommunityToolkit.Mvvm.Input;
using OxyPlot;
using OxyPlot.Axes;
using OxyPlot.Series;
using System;
using System.Collections.ObjectModel;
using System.Linq;
using System.Threading;
using System.Threading.Tasks;
using System.Windows;

namespace ASTM_D7896_Tester.ViewModels;

public partial class D7896ViewModel : ObservableObject
{
    private readonly IPlcService _plcService;
    private AppConfig _config;
    private readonly ReportService _reportService;

    // ======================= 成员变量 =======================
    private Timer? _monitorTimer;               // 后台监控定时器
    private readonly object _monitorLock = new(); // 监控更新锁
    private double _lastRawPressure = 0;        // 上次压力原始值
    private double _lastRawTemperature = 0;     // 上次温度原始值

    // ======================= UI绑定属性 =======================
    public ObservableCollection<string> ReferenceLiquids { get; } = new() { "蒸馏水", "甲苯", "乙二醇" };

    [ObservableProperty] private string _sampleId = "未命名样品";
    [ObservableProperty] private double _testTemperature = 25.0;
    [ObservableProperty] private string _testDateTime = DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss");
    [ObservableProperty] private bool _isTesting = false;
    [ObservableProperty] private string _statusMessage = "就绪";
    [ObservableProperty] private int _currentMeasurementIndex = 0;
    [ObservableProperty] private ObservableCollection<MeasurementResult> _measurements = new();
    [ObservableProperty] private double _averageThermalConductivity;
    [ObservableProperty] private double _averageThermalDiffusivity;
    [ObservableProperty] private double _averageVolumetricHeatCapacity;

    // 测试条件（测试前设置）
    [ObservableProperty] private double _sampleVolume = 40.0;
    [ObservableProperty] private bool _bubbleRemoved = true;
    [ObservableProperty] private bool _usePressure = false;
    [ObservableProperty] private double _pressureValue = 0.0;
    [ObservableProperty] private bool _isCleanConfirmed = true;
    [ObservableProperty] private string _cleanerName = "";
    [ObservableProperty] private double _ambientTemperature = 25.0;
    [ObservableProperty] private bool _ambientCalibrated = true;
    [ObservableProperty] private bool _platinumCompatible = true;
    [ObservableProperty] private string _liquidReactivityNote = "";

    // 实时监控参数（测试前+测试中+测试后持续更新）
    [ObservableProperty] private double _platinumResistance = 0.0;    // 铂丝电阻（实时）
    [ObservableProperty] private double _chamberPressure = 0.0;       // 样品池压力（实时）
    [ObservableProperty] private double _currentTestTemperature = 0.0; // 当前测试温度（实时）

    // 系统校准
    [ObservableProperty] private bool _isCalibrating = false;
    [ObservableProperty] private string _calibrationStatus = "";
    [ObservableProperty] private string _selectedReferenceLiquid = "蒸馏水";
    [ObservableProperty] private double _referenceConductivity = 0.606;
    [ObservableProperty] private double _measuredConductivity = 0.0;
    [ObservableProperty] private double _calibrationErrorPercent = 0.0;

    // 温升曲线
    [ObservableProperty] private string _curveTitle = "温升曲线";
    [ObservableProperty] private PlotModel _temperatureCurveModel;


    private Th1963LanService _th1963Upt;
    private Th1963LanService _th1963Ustd;


    // ======================= 构造函数 =======================
    public D7896ViewModel()
    {
        _config = App.PlcConfig ?? new AppConfig();
        _plcService = App.PlcService;
        _reportService = new ReportService(_config.TestParameters.ReportOutputPath);

        // 加载配置中的默认值
        SampleVolume = _config.TestParameters.DefaultSampleVolume;
        UsePressure = _config.TestParameters.UsePressure;
        PressureValue = _config.TestParameters.DefaultPressure;
        SelectedReferenceLiquid = _config.TestParameters.ReferenceLiquid;
        ReferenceConductivity = _config.TestParameters.ReferenceConductivity;

        // 前置确认项默认勾选
        IsCleanConfirmed = true;
        BubbleRemoved = true;
        PlatinumCompatible = true;
        AmbientCalibrated = true;

        // 启动后台监控
        StartBackgroundMonitoring();
    }

    // ======================= 后台监控系统 =======================
    private async void StartBackgroundMonitoring()
    {
        // 等待PLC连接
        await Task.Delay(1000);

        _monitorTimer = new Timer(async _ => await MonitorPlcValues(), null, 0, 1000);
    }

    private async Task MonitorPlcValues()
    {
        if (!await _plcService.IsConnectedAsync())
            return;

        lock (_monitorLock)
        {
            try
            {
                // 1. 读取铂丝电阻值（D1422，0.001Ω单位）
                float rawResistance = _plcService.ReadFloatAsync(_config.PlcRegisterAddresses.Resistance).Result;
                double newResistance = rawResistance / 1000.0;
                if (Math.Abs(newResistance - _lastRawPressure) > 0.0001)
                {
                    _lastRawPressure = newResistance;
                    Application.Current.Dispatcher.Invoke(() => PlatinumResistance = newResistance);
                }

                // 2. 读取压力值（D1322，0.1kPa单位）
                float rawPressure = _plcService.ReadFloatAsync(_config.PlcRegisterAddresses.Pressure).Result;

                _lastRawTemperature = rawPressure;
                Application.Current.Dispatcher.Invoke(() => ChamberPressure = rawPressure);


                // 3. 读取温度值（D1376，0.1℃单位）
                float rawTemp = _plcService.ReadFloatAsync(_config.PlcRegisterAddresses.Temperature).Result;


                Application.Current.Dispatcher.Invoke(() => CurrentTestTemperature = rawTemp);

            }
            catch (Exception ex)
            {
                System.Diagnostics.Debug.WriteLine($"监控读取失败: {ex.Message}");
            }
        }
    }

    // ======================= 测试前：获取初始铂丝电阻 =======================
    private async Task<double> GetInitialResistanceAsync()
    {
        if (!await _plcService.IsConnectedAsync())
            return 0;

        try
        {
            float rawResistance = await _plcService.ReadFloatAsync(_config.PlcRegisterAddresses.Resistance);
            return rawResistance / 1000.0;
        }
        catch
        {
            return 0;
        }
    }

    // ======================= 核心测试流程 =======================
    [RelayCommand]
    private async Task StartTestAsync()
    {
        // ========== 第1阶段：测试前置检查（标准7.1、7.6、1.4、8.1） ==========
        if (!IsCleanConfirmed || !BubbleRemoved || !PlatinumCompatible || !AmbientCalibrated)
        {
            MessageBox.Show("请完成所有测试前确认项（清洁、排泡、铂兼容性、环境校准）。", "前置条件未满足");
            return;
        }
        if (SampleVolume <= 0)
        {
            MessageBox.Show("请输入有效的样品量（≥1 mL）。", "参数错误");
            return;
        }

        // 加压条件检查（标准1.8、附录A2）
        if (UsePressure && PressureValue <= 0)
        {
            MessageBox.Show("请设置有效的加压值（>0 kPa）。", "参数错误");
            return;
        }

        if (IsTesting)
        {
            MessageBox.Show("测试正在进行中，请稍后...", "提示");
            return;
        }

        // 连接PLC
        if (!await _plcService.IsConnectedAsync())
        {
            var connected = await _plcService.ConnectAsync();
            if (!connected)
            {
                MessageBox.Show("无法连接到PLC，请检查配置。", "错误");
                return;
            }
        }

        // ========== 第2阶段：加压控制（标准1.7-1.8、附录A2） ==========
        if (UsePressure)
        {
            StatusMessage = "正在加压...";
            await _plcService.WriteCoilAsync(_config.PlcRegisterAddresses.InletValveCoil, true);
            await Task.Delay(3000);
            await UpdateRealTimeParametersAsync();
            if (ChamberPressure < PressureValue - 5)
                MessageBox.Show($"压力未达到设定值 {PressureValue} kPa，当前 {ChamberPressure:F1} kPa", "警告");
        }

        // ========== 第3阶段：获取初始铂丝电阻 R₀（用于校准） ==========
        double initialResistance = await GetInitialResistanceAsync();
        if (initialResistance > 0)
        {
            StatusMessage = $"初始电阻已读取: {initialResistance:F4} Ω";
        }

        // ========== 第4阶段：执行10次重复测量（标准4.1、5.4） ==========
        Measurements.Clear();
        IsTesting = true;
        StatusMessage = "开始测试...";

        try
        {
            for (int i = 1; i <= _config.TestParameters.MeasurementCount; i++)
            {
                CurrentMeasurementIndex = i;
                StatusMessage = $"正在执行第 {i} 次测量...";

                // 4.1 发送加热脉冲（标准5.4：短时电流施加）
                await _plcService.WriteCoilAsync(_config.PlcRegisterAddresses.StartCommand, true);
                //await Task.Delay(500);
                //await _plcService.WriteCoilAsync(_config.PlcRegisterAddresses.StartCommand, false);

                // 4.2 等待测量完成（标准5.3：0.8秒测试时间）
                await Task.Delay(800);

                // 4.3 读取计算结果（标准1.2：λ和α直接测量）
                float lambda = await _plcService.ReadFloatAsync(_config.PlcRegisterAddresses.ThermalConductivity);
                float alpha = await _plcService.ReadFloatAsync(_config.PlcRegisterAddresses.ThermalDiffusivity);

                // 记录测试温度
                if (i == 1) TestTemperature = CurrentTestTemperature;

                // 生成温升曲线
                GenerateTemperatureCurve(lambda, alpha);

                var result = new MeasurementResult
                {
                    Index = i,
                    ThermalConductivity = lambda,
                    ThermalDiffusivity = alpha
                };
                result.CalculateVhc();

                Application.Current.Dispatcher.Invoke(() => Measurements.Add(result));
                StatusMessage = $"第 {i} 次测量完成，λ={lambda:F4} W/m·K";

                // 4.4 间隔30秒（标准5.4）
                if (i < _config.TestParameters.MeasurementCount)
                    await Task.Delay(_config.TestParameters.IntervalSeconds * 1000);
            }

            // 计算平均值
            CalculateAverages();
            StatusMessage = "测试完成。";
        }
        catch (Exception ex)
        {
            StatusMessage = $"测试出错: {ex.Message}";
            MessageBox.Show($"测试过程中发生错误: {ex.Message}", "错误");
        }
        finally
        {
            // ========== 第5阶段：测试结束后泄压 ==========
            if (UsePressure)
            {
                await _plcService.WriteCoilAsync(_config.PlcRegisterAddresses.InletValveCoil, false);
                await _plcService.WriteCoilAsync(_config.PlcRegisterAddresses.OutletValveCoil, true);
                await Task.Delay(1000);
                await _plcService.WriteCoilAsync(_config.PlcRegisterAddresses.OutletValveCoil, false);
            }
            IsTesting = false;
        }
    }

    [RelayCommand]
    private async Task StopTestCommandAsync()
    {
        if (IsTesting)
        {
            IsTesting = false;
            StatusMessage = "已停止测试。";
        }
        if (!IsTesting)
        {
            MessageBox.Show("没有正在进行的测试。", "提示");
            return;
        }

        await Task.Delay(500);
        await _plcService.WriteCoilAsync(_config.PlcRegisterAddresses.StartCommand, false);
        // 泄压
        if (UsePressure)
        {
            await _plcService.WriteCoilAsync(_config.PlcRegisterAddresses.InletValveCoil, false);
            await _plcService.WriteCoilAsync(_config.PlcRegisterAddresses.OutletValveCoil, true);
            await Task.Delay(1000);
            await _plcService.WriteCoilAsync(_config.PlcRegisterAddresses.OutletValveCoil, false);
        }
        IsTesting = false;
        StatusMessage = "测试已停止。";
    }

    // ======================= 辅助方法 =======================
    private async Task UpdateRealTimeParametersAsync()
    {
        if (!await _plcService.IsConnectedAsync())
            return;

        try
        {
            // 压力（D1322，0.1kPa单位）
            float rawPressure = await _plcService.ReadFloatAsync(_config.PlcRegisterAddresses.Pressure);
            ChamberPressure = rawPressure / 10.0;
        }
        catch (Exception ex)
        {
            StatusMessage = $"实时参数读取失败: {ex.Message}";
        }
    }

    private void GenerateTemperatureCurve(float lambda, float alpha)
    {
        if (TemperatureCurveModel == null)
        {
            TemperatureCurveModel = new PlotModel { Title = "温升曲线对比", Background = OxyColors.White };
            TemperatureCurveModel.Axes.Add(new LinearAxis { Position = AxisPosition.Bottom, Title = "时间 (s)", Minimum = 0, Maximum = 2 });
            TemperatureCurveModel.Axes.Add(new LinearAxis { Position = AxisPosition.Left, Title = "温升 (℃)", Minimum = 0 });
        }

        var series = new LineSeries
        {
            Title = $"第{CurrentMeasurementIndex}次测量",
            Color = GetColorForIndex(CurrentMeasurementIndex),
            StrokeThickness = 1.5
        };

        // 理论公式 ΔT = (Q/(4πλL)) * ln(t/t0) + C
        double Q = 0.01;
        double L = _config.TestParameters.PlatinumWireLength;
        double constant = 0.2;
        for (int i = 1; i <= 200; i++)
        {
            double t = i * 0.01;
            double deltaT = (Q / (4 * Math.PI * lambda * L)) * Math.Log(t + 0.1) + constant;
            series.Points.Add(new DataPoint(t, deltaT));
        }
        TemperatureCurveModel.Series.Add(series);
        TemperatureCurveModel.InvalidatePlot(true);
        CurveTitle = $"已完成 {CurrentMeasurementIndex} 次测量";
    }

    private OxyColor GetColorForIndex(int index)
    {
        var colors = new[] { OxyColors.Red, OxyColors.Blue, OxyColors.Green, OxyColors.Orange, OxyColors.Purple, OxyColors.Brown, OxyColors.Pink, OxyColors.Cyan, OxyColors.Magenta, OxyColors.Olive };
        return colors[(index - 1) % colors.Length];
    }

    private void CalculateAverages()
    {
        if (Measurements.Count == 0) return;
        AverageThermalConductivity = Measurements.Average(m => m.ThermalConductivity);
        AverageThermalDiffusivity = Measurements.Average(m => m.ThermalDiffusivity);
        AverageVolumetricHeatCapacity = Measurements.Average(m => m.VolumetricHeatCapacity);
    }

    // ======================= UI命令 =======================
    [RelayCommand]
    private void Reset()
    {
        Measurements.Clear();
        AverageThermalConductivity = AverageThermalDiffusivity = AverageVolumetricHeatCapacity = 0;
        CurrentMeasurementIndex = 0;
        StatusMessage = "已重置";
        TestDateTime = DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss");
        TemperatureCurveModel = null;
    }

    [RelayCommand]
    private async Task GenerateReportAsync()
    {
        if (Measurements.Count == 0)
        {
            MessageBox.Show("没有测试数据，请先执行测试。", "提示");
            return;
        }
        try
        {
            var extraParams = new Dictionary<string, object>
            {
                ["SampleVolume"] = SampleVolume,
                ["BubbleRemoved"] = BubbleRemoved,
                ["UsePressure"] = UsePressure,
                ["PressureValue"] = PressureValue,
                ["IsCleanConfirmed"] = IsCleanConfirmed,
                ["CleanerName"] = CleanerName,
                ["AmbientTemperature"] = AmbientTemperature,
                ["AmbientCalibrated"] = AmbientCalibrated,
                ["PlatinumCompatible"] = PlatinumCompatible,
                ["LiquidReactivityNote"] = LiquidReactivityNote,
                ["InitialResistance"] = PlatinumResistance  // 测试前的初始电阻
            };
            string reportPath = await _reportService.GenerateReportAsync(SampleId, TestTemperature, Measurements.ToList(),
                AverageThermalConductivity, AverageThermalDiffusivity, AverageVolumetricHeatCapacity,
                _config.TestParameters, extraParams);
            MessageBox.Show($"报告已生成：{reportPath}", "成功");
        }
        catch (Exception ex)
        {
            MessageBox.Show($"生成报告失败：{ex.Message}", "错误");
        }
    }

    // 控制命令
    [RelayCommand]
    private async Task PressureCalibrationAsync()
    {
        await _plcService.WriteCoilAsync(_config.PlcRegisterAddresses.PressureCalibrationCoil, true);
    }
    [RelayCommand]
    private async Task ResistanceZeroAsync()
    {
        await _plcService.WriteCoilAsync(_config.PlcRegisterAddresses.ResistanceZeroCoil, true);
    }

    [RelayCommand]
    private async Task InletValveControlAsync()
    {
        await EnsureConnected();
        bool current = await _plcService.ReadCoilAsync(_config.PlcRegisterAddresses.InletValveCoil);
        await _plcService.WriteCoilAsync(_config.PlcRegisterAddresses.InletValveCoil, !current);
        StatusMessage = $"进气阀已{(current ? "关闭" : "开启")}";
    }

    [RelayCommand]
    private async Task OutletValveControlAsync()
    {
        await EnsureConnected();
        bool current = await _plcService.ReadCoilAsync(_config.PlcRegisterAddresses.OutletValveCoil);
        await _plcService.WriteCoilAsync(_config.PlcRegisterAddresses.OutletValveCoil, !current);
        StatusMessage = $"排气阀已{(current ? "关闭" : "开启")}";
    }

    [RelayCommand] private void ConfirmBubbleRemoved() => BubbleRemoved = true;
    [RelayCommand]
    private void ConfirmClean()
    {
        if (string.IsNullOrWhiteSpace(CleanerName))
        {
            MessageBox.Show("请输入清洁人员姓名。", "提示");
            return;
        }
        IsCleanConfirmed = true;
    }
    [RelayCommand] private void ConfirmPlatinumCompatible() => PlatinumCompatible = true;
    [RelayCommand]
    private async Task CalibrateAmbientAsync()
    {
        await EnsureConnected();
        float temp = await _plcService.ReadFloatAsync(_config.PlcRegisterAddresses.Temperature);
        AmbientTemperature = temp;
        AmbientCalibrated = true;
        StatusMessage = $"环境温度校准完成：{AmbientTemperature:F1} °C";
    }
    [RelayCommand] private async Task PerformSystemCalibrationAsync() { /* 系统校准逻辑 */ }

    private async Task EnsureConnected()
    {
        if (!await _plcService.IsConnectedAsync())
            await _plcService.ConnectAsync();
    }
}