using Avalonia.Threading;
using CommunityToolkit.Mvvm.ComponentModel;
using CommunityToolkit.Mvvm.Input;
using Footwear_Test_methodsfor_wholeshoe_Slipresistanceperformance.Models;
using Footwear_Test_methodsfor_wholeshoe_Slipresistanceperformance.Services;
using LiveChartsCore;
using LiveChartsCore.Defaults;
using LiveChartsCore.SkiaSharpView;
using LiveChartsCore.SkiaSharpView.Painting;
using Serilog;
using SkiaSharp;
using System;
using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.Diagnostics;
using System.Globalization;
using System.IO;
using System.Linq;
using System.Text.Json;
using System.Threading.Tasks;

namespace Footwear_Test_methodsfor_wholeshoe_Slipresistanceperformance.ViewModels
{
    public partial class MainWindowViewModel : ViewModelBase, IDisposable
    {
        private readonly SlipResistanceDeviceService deviceService = new();
        private readonly SlipExcelExportService excelExportService = new();
        private readonly DispatcherTimer refreshTimer;
        private readonly Stopwatch runStopwatch = new();
        private readonly List<SlipDataPoint> currentRun = [];
        private readonly ObservableCollection<ObservablePoint> verticalLoadPoints = [];
        private readonly ObservableCollection<ObservablePoint> horizontalFrictionPoints = [];
        private readonly ObservableCollection<ObservablePoint> frictionCoefficientPoints = [];
        private readonly ObservableCollection<ObservablePoint> displacementPoints = [];

        private bool isLoadingDeviceSettings;
        private bool wasRunning;
        private List<SlipDataPoint> lastCompletedRun = [];

        [ObservableProperty]
        private string testNumber = $"SLIP-{DateTime.Now:yyyyMMdd-HHmm}";

        [ObservableProperty]
        private string operatorName = string.Empty;

        [ObservableProperty]
        private string methodName = "GB/T 3903.6-2024";

        [ObservableProperty]
        private string reportName = string.Empty;

        [ObservableProperty]
        private string sampleFeature = "整鞋样品 / 瓷砖接触面 / 水平测试";

        [ObservableProperty]
        private string currentStatus = "设备连接中，等待 PLC 与 ADC 实时数据";

        [ObservableProperty]
        private int uploadProgress;

        [ObservableProperty]
        private string manualDistance = "0";

        [ObservableProperty]
        private int selectedSampleIndex;

        [ObservableProperty]
        private bool isSettingsDialogOpen;

        [ObservableProperty]
        private string manualSpeed = "0.00";

        [ObservableProperty]
        private string manualDisplacement = "0.00";

        [ObservableProperty]
        private string testSpeed = "0.30";

        [ObservableProperty]
        private string normalPressureZero = "0";

        [ObservableProperty]
        private string normalPressureCoefficient = "0.00";

        [ObservableProperty]
        private string frictionZero1 = "0";

        [ObservableProperty]
        private string frictionCoefficient1 = "0.00";

        [ObservableProperty]
        private string frictionZero2 = "0";

        [ObservableProperty]
        private string frictionCoefficient2 = "0.00";

        [ObservableProperty]
        private string plcPortName = "COM7";

        [ObservableProperty]
        private string adcPortName = "COM8";

        [ObservableProperty]
        private int baudRate = 115200;

        [ObservableProperty]
        private int selectedShoeSizeIndex;

        [ObservableProperty]
        private int selectedLubricantIndex;

        [ObservableProperty]
        private int selectedModeIndex = 2;

        [ObservableProperty]
        private int selectedSurfaceIndex;

        [ObservableProperty]
        private string targetLoadText = "400 N";

        [ObservableProperty]
        private string actualLoadText = "0.0 N";

        [ObservableProperty]
        private string deviceStatus = "离线";

        [ObservableProperty]
        private string activeMode = "水平测试模式";

        [ObservableProperty]
        private string resultSummary = "等待 3 次有效试验";

        [ObservableProperty]
        private string staticCoefficient = "0.000";

        [ObservableProperty]
        private string dynamicCoefficient = "0.000";

        [ObservableProperty]
        private string verticalPressure = "0.0";

        [ObservableProperty]
        private string horizontalForce = "0.0";

        [ObservableProperty]
        private string frictionCoefficient = "0.000";

        [ObservableProperty]
        private string distance = "0.0";

        public string TestSpeedText => $"{TestSpeed} m/s";
        public string SampleRateText { get; } = "30 Hz";
        public string BatchNumber { get; } = DateTime.Now.ToString("yyyy-MM-dd", CultureInfo.InvariantCulture);
        public string UploadProgressText => $"{UploadProgress}%";
        public string StandardReference { get; } = "GB/T 3903.6-2024 5.1.3、7.3.1.4、8.1-8.3：实时采集、静/动摩擦系数、三次平均与重测判定";

        public ObservableCollection<TestSample> Samples { get; } = [];

        public DrawMarginFrame ChartFrame { get; } = new()
        {
            Fill = new SolidColorPaint(SKColor.Parse("#FFFFFF")),
            Stroke = new SolidColorPaint(SKColor.Parse("#CBD5E1")) { StrokeThickness = 1.4f }
        };

        public SolidColorPaint LegendTextPaint { get; } = new(SKColor.Parse("#334155"));

        public ISeries[] Series { get; }

        public Axis[] XAxes { get; } =
        [
            new Axis
            {
                Name = "时间(s)",
                MinLimit = 0,
                UnitWidth = 0.1,
                SeparatorsPaint = new SolidColorPaint(SKColor.Parse("#D7E0EA")) { StrokeThickness = 1 },
                SubseparatorsPaint = new SolidColorPaint(SKColor.Parse("#EEF3F8")) { StrokeThickness = 1 },
                SubseparatorsCount = 4,
                LabelsPaint = new SolidColorPaint(SKColor.Parse("#475569")),
                NamePaint = new SolidColorPaint(SKColor.Parse("#334155")),
                TextSize = 12,
                NameTextSize = 13,
                Padding = new LiveChartsCore.Drawing.Padding(4, 3, 4, 3)
            }
        ];

        public Axis[] YAxes { get; } =
        [
            new Axis
            {
                Name = "压力 / 摩擦力 / 位移",
                MinLimit = 0,
                SeparatorsPaint = new SolidColorPaint(SKColor.Parse("#D7E0EA")) { StrokeThickness = 1 },
                SubseparatorsPaint = new SolidColorPaint(SKColor.Parse("#EEF3F8")) { StrokeThickness = 1 },
                SubseparatorsCount = 4,
                LabelsPaint = new SolidColorPaint(SKColor.Parse("#475569")),
                NamePaint = new SolidColorPaint(SKColor.Parse("#334155")),
                TextSize = 11,
                NameTextSize = 12,
                Padding = new LiveChartsCore.Drawing.Padding(2, 2, 3, 2)
            },
            new Axis
            {
                Name = "摩擦系数",
                Position = LiveChartsCore.Measure.AxisPosition.End,
                MinLimit = 0,
                UnitWidth = 0.1,
                LabelsPaint = new SolidColorPaint(SKColor.Parse("#7E22CE")),
                NamePaint = new SolidColorPaint(SKColor.Parse("#7E22CE")),
                SeparatorsPaint = new SolidColorPaint(SKColor.Parse("#F1E7FF")) { StrokeThickness = 1 },
                TextSize = 11,
                NameTextSize = 12,
                Padding = new LiveChartsCore.Drawing.Padding(3, 2, 2, 2)
            }
        ];

        public MainWindowViewModel()
        {
            Log.Information("初始化主页面 ViewModel");
            Series =
            [
                CreateLineSeries("垂直压力(N)", verticalLoadPoints, "#DC2626", 0, 0.65),
                CreateLineSeries("水平摩擦力(N)", horizontalFrictionPoints, "#16A34A", 0, 0.65),
                CreateLineSeries("摩擦系数", frictionCoefficientPoints, "#C026D3", 1, 0.65),
                CreateLineSeries("位移(mm)", displacementPoints, "#2563EB", 0, 0.35)
            ];

            LoadDeviceSettings();
            UpdateTargetLoad();
            deviceService.Start(CurrentSettings());
            _ = LoadPlcParametersAsync();

            refreshTimer = new DispatcherTimer { Interval = TimeSpan.FromMilliseconds(33) };
            refreshTimer.Tick += (_, _) => RefreshFromDevice();
            refreshTimer.Start();
        }

        [RelayCommand]
        private async Task Clear()
        {
            await RunDeviceCommand(deviceService.PulseResetAsync(), "已发送复位指令 M90");
        }

        [RelayCommand]
        private void Preload()
        {
            CurrentStatus = "请在 0.2 s 内施加目标垂直载荷，载荷达到后启动滑动测试";
        }

        [RelayCommand]
        private async Task StartTest()
        {
            BeginRun();
            await RunDeviceCommand(deviceService.PulseStartTestAsync(), "已发送测试启动指令 M80，等待 M81 运行状态");
        }

        [RelayCommand]
        private async Task StopTest()
        {
            await RunDeviceCommand(deviceService.PulseStopTestAsync(), "已发送测试停止指令 M83");
        }

        [RelayCommand]
        private void ExportReport()
        {
            var points = currentRun.Count > 0 ? currentRun.ToList() : lastCompletedRun;
            if (points.Count == 0)
            {
                Log.Warning("请求导出 Excel 时没有可导出的实时采样数据：TestNumber={TestNumber}", TestNumber);
                CurrentStatus = "没有可导出的实时采样数据，请先完成一次测试";
                return;
            }

            try
            {
                var report = new SlipReportExport(
                    TestNumber,
                    OperatorName,
                    MethodName,
                    ReportName,
                    SampleFeature,
                    CurrentShoeSize(),
                    CurrentLubricant(),
                    CurrentMode(),
                    CurrentSurface(),
                    TargetLoadText,
                    ActualLoadText,
                    TestSpeedText,
                    StandardReference,
                    Samples.ToList(),
                    points);

                var path = excelExportService.Export(report);
                UploadProgress = 100;
                CurrentStatus = $"Excel 已导出：{path}";
            }
            catch (Exception ex)
            {
                Log.Error(ex, "Excel 导出失败：TestNumber={TestNumber}, PointCount={PointCount}", TestNumber, points.Count);
                CurrentStatus = $"Excel 导出失败：{ex.Message}";
            }
        }

        [RelayCommand]
        private async Task Lift() => await RunDeviceCommand(deviceService.LiftAsync(), "垂直架提升指令已发送 M5");

        [RelayCommand]
        private async Task Lower() => await RunDeviceCommand(deviceService.LowerAsync(), "垂直架下降指令已发送 M4");

        [RelayCommand]
        private async Task MoveLeft() => await RunDeviceCommand(deviceService.ToggleMoveLeftAsync(), "水平板左移状态已切换 M1");

        [RelayCommand]
        private async Task MoveRight() => await RunDeviceCommand(deviceService.ToggleMoveRightAsync(), "水平板右移状态已切换 M2");

        [RelayCommand]
        private void DeleteSelectedSample()
        {
            var sample = Samples.FirstOrDefault(x => x.Index == SelectedSampleIndex);
            if (sample is null)
            {
                CurrentStatus = $"未找到序号 {SelectedSampleIndex} 的实验数据";
                return;
            }

            Samples.Remove(sample);
            UpdateResultSummary();
            CurrentStatus = $"已删除序号 {SelectedSampleIndex} 的实验数据";
        }

        [RelayCommand]
        private void ShowSettingsDialog()
        {
            IsSettingsDialogOpen = true;
        }

        [RelayCommand]
        private void CloseSettingsDialog()
        {
            IsSettingsDialogOpen = false;
            deviceService.UpdateSettings(CurrentSettings());
        }

        [RelayCommand]
        private void CalibrateNormalPressureZero()
        {
            try
            {
                var zero = deviceService.CaptureCurrentAdcZero();
                NormalPressureZero = zero.NormalPressureZero.ToString(CultureInfo.InvariantCulture);
                SaveAndApplySettings();
                CurrentStatus = "正压力零点已按当前 ADC 原始值采集";
            }
            catch (Exception ex)
            {
                Log.Error(ex, "正压力零点采集失败");
                CurrentStatus = $"正压力零点采集失败：{ex.Message}";
            }
        }

        [RelayCommand]
        private void CalibrateFrictionZero()
        {
            try
            {
                var zero = deviceService.CaptureCurrentAdcZero();
                FrictionZero1 = zero.FrictionZero1.ToString(CultureInfo.InvariantCulture);
                FrictionZero2 = zero.FrictionZero2.ToString(CultureInfo.InvariantCulture);
                SaveAndApplySettings();
                CurrentStatus = "摩擦零点已按当前 ADC 原始值采集";
            }
            catch (Exception ex)
            {
                Log.Error(ex, "摩擦零点采集失败");
                CurrentStatus = $"摩擦零点采集失败：{ex.Message}";
            }
        }

        partial void OnUploadProgressChanged(int value) => OnPropertyChanged(nameof(UploadProgressText));

        partial void OnManualSpeedChanged(string value)
        {
            SaveAndApplySettings();
            WriteNumericSetting(value, deviceService.WriteManualSpeedAsync, "手动速度");
        }

        partial void OnManualDisplacementChanged(string value)
        {
            SaveAndApplySettings();
            WriteNumericSetting(value, deviceService.WriteManualDisplacementAsync, "手动位移");
        }

        partial void OnTestSpeedChanged(string value)
        {
            OnPropertyChanged(nameof(TestSpeedText));
            SaveAndApplySettings();
            WriteNumericSetting(value, deviceService.WriteTestSpeedAsync, "测试速度");
        }

        partial void OnNormalPressureZeroChanged(string value) => SaveAndApplySettings();

        partial void OnNormalPressureCoefficientChanged(string value) => SaveAndApplySettings();

        partial void OnFrictionZero1Changed(string value) => SaveAndApplySettings();

        partial void OnFrictionCoefficient1Changed(string value) => SaveAndApplySettings();

        partial void OnFrictionZero2Changed(string value) => SaveAndApplySettings();

        partial void OnFrictionCoefficient2Changed(string value) => SaveAndApplySettings();

        partial void OnPlcPortNameChanged(string value) => SaveAndApplySettings();

        partial void OnAdcPortNameChanged(string value) => SaveAndApplySettings();

        partial void OnBaudRateChanged(int value) => SaveAndApplySettings();

        partial void OnSelectedShoeSizeIndexChanged(int value) => UpdateTargetLoad();

        partial void OnSelectedModeIndexChanged(int value)
        {
            ActiveMode = CurrentMode();
        }

        public void Dispose()
        {
            refreshTimer.Stop();
            deviceService.Dispose();
        }

        private void RefreshFromDevice()
        {
            var device = deviceService.CurrentSnapshot;
            DeviceStatus = device.IsConnected
                ? device.IsTestRunning ? "联机 / 测试中" : device.IsResetting ? "联机 / 复位中" : "联机 / 待机"
                : "离线";

            VerticalPressure = device.VerticalLoadN.ToString("F1", CultureInfo.InvariantCulture);
            HorizontalForce = device.HorizontalFrictionN.ToString("F1", CultureInfo.InvariantCulture);
            FrictionCoefficient = device.FrictionCoefficient.ToString("F3", CultureInfo.InvariantCulture);
            Distance = device.DisplacementMm.ToString("F1", CultureInfo.InvariantCulture);
            ActualLoadText = $"{VerticalPressure} N";

            if (!device.IsConnected && !string.IsNullOrWhiteSpace(device.LastError))
            {
                CurrentStatus = $"设备离线：{device.LastError}";
            }

            if (!wasRunning && device.IsTestRunning)
            {
                BeginRun();
            }

            if (device.IsTestRunning)
            {
                RecordPoint(device);
            }

            if (wasRunning && !device.IsTestRunning)
            {
                CompleteRun();
            }

            wasRunning = device.IsTestRunning;
        }

        private void BeginRun()
        {
            currentRun.Clear();
            verticalLoadPoints.Clear();
            horizontalFrictionPoints.Clear();
            frictionCoefficientPoints.Clear();
            displacementPoints.Clear();
            runStopwatch.Restart();
            UploadProgress = 0;
            CurrentStatus = "测试运行：按标准采集垂直载荷、摩擦力、位移与摩擦系数";
            Log.Information("测试开始：TestNumber={TestNumber}, TargetLoad={TargetLoad}, TestSpeed={TestSpeed}", TestNumber, TargetLoadText, TestSpeedText);
        }

        private void RecordPoint(SlipDeviceSnapshot device)
        {
            var time = runStopwatch.Elapsed.TotalSeconds;
            if (currentRun.Count > 0 && time - currentRun[^1].TimeSeconds < 1.0 / 30.0)
            {
                return;
            }

            var point = new SlipDataPoint(
                device.Timestamp,
                time,
                device.VerticalLoadN,
                device.HorizontalFrictionN,
                device.DisplacementMm,
                device.FrictionCoefficient);

            currentRun.Add(point);
            verticalLoadPoints.Add(new ObservablePoint(time, point.VerticalLoadN));
            horizontalFrictionPoints.Add(new ObservablePoint(time, point.HorizontalFrictionN));
            frictionCoefficientPoints.Add(new ObservablePoint(time, point.FrictionCoefficient));
            displacementPoints.Add(new ObservablePoint(time, point.DisplacementMm));

            UploadProgress = Math.Min(99, currentRun.Count);
        }

        private void CompleteRun()
        {
            runStopwatch.Stop();
            if (currentRun.Count < 3)
            {
                Log.Warning("测试停止但采样点不足：TestNumber={TestNumber}, PointCount={PointCount}", TestNumber, currentRun.Count);
                CurrentStatus = "测试已停止，但有效采样点不足，未生成结果";
                return;
            }

            lastCompletedRun = currentRun.ToList();
            var peak = FindStaticPeak(currentRun);
            var dynamicWindow = currentRun
                .Where(point => point.TimeSeconds >= 0.3 && point.TimeSeconds <= 0.6)
                .ToList();
            if (dynamicWindow.Count == 0)
            {
                dynamicWindow = currentRun.ToList();
            }

            var staticCoefficientValue = CalculateCoefficient(peak.HorizontalFrictionN, peak.VerticalLoadN);
            var dynamicForce = dynamicWindow.Average(point => point.HorizontalFrictionN);
            var dynamicLoad = dynamicWindow.Average(point => point.VerticalLoadN);
            var dynamicCoefficientValue = CalculateCoefficient(dynamicForce, dynamicLoad);
            var verdict = NeedsRetest(staticCoefficientValue, dynamicCoefficientValue) ? "需重测" : "有效";
            var nextIndex = Samples.Count == 0 ? 1 : Samples.Max(sample => sample.Index) + 1;

            Samples.Insert(0, new TestSample(
                nextIndex,
                DateTime.Now.ToString("HH:mm:ss", CultureInfo.InvariantCulture),
                staticCoefficientValue.ToString("F3", CultureInfo.InvariantCulture),
                dynamicCoefficientValue.ToString("F3", CultureInfo.InvariantCulture),
                verdict,
                staticCoefficientValue,
                dynamicCoefficientValue));

            StaticCoefficient = staticCoefficientValue.ToString("F3", CultureInfo.InvariantCulture);
            DynamicCoefficient = dynamicCoefficientValue.ToString("F3", CultureInfo.InvariantCulture);
            UpdateResultSummary();
            UploadProgress = 100;
            CurrentStatus = verdict == "有效"
                ? "测试完成：已按标准生成静/动摩擦系数"
                : "测试完成：最近三次结果差异超过 10%，建议重新测试";
            Log.Information(
                "测试完成：TestNumber={TestNumber}, PointCount={PointCount}, StaticCoefficient={StaticCoefficient:F3}, DynamicCoefficient={DynamicCoefficient:F3}, Verdict={Verdict}",
                TestNumber,
                currentRun.Count,
                staticCoefficientValue,
                dynamicCoefficientValue,
                verdict);
        }

        private bool NeedsRetest(double staticCoefficientValue, double dynamicCoefficientValue)
        {
            var latest = Samples.Take(2).ToList();
            if (latest.Count < 2)
            {
                return false;
            }

            var staticValues = latest.Select(sample => sample.StaticCoefficientValue).Append(staticCoefficientValue).ToArray();
            var dynamicValues = latest.Select(sample => sample.DynamicCoefficientValue).Append(dynamicCoefficientValue).ToArray();
            return ExceedsTenPercent(staticValues) || ExceedsTenPercent(dynamicValues);
        }

        private static bool ExceedsTenPercent(double[] values)
        {
            var average = values.Average();
            if (Math.Abs(average) < 0.0001)
            {
                return false;
            }

            return (values.Max() - values.Min()) / Math.Abs(average) > 0.10;
        }

        private void UpdateResultSummary()
        {
            var latest = Samples.Take(3).ToList();
            if (latest.Count == 0)
            {
                ResultSummary = "等待 3 次有效试验";
                return;
            }

            var staticAverage = latest.Average(sample => sample.StaticCoefficientValue);
            var dynamicAverage = latest.Average(sample => sample.DynamicCoefficientValue);
            ResultSummary = $"近 {latest.Count} 次平均 静 {staticAverage:F3} / 动 {dynamicAverage:F3}";
        }

        private static SlipDataPoint FindStaticPeak(IReadOnlyList<SlipDataPoint> points)
        {
            for (var index = 1; index < points.Count - 1; index++)
            {
                var previous = points[index - 1].HorizontalFrictionN;
                var current = points[index].HorizontalFrictionN;
                var next = points[index + 1].HorizontalFrictionN;
                if (current >= previous && current >= next && current > 0)
                {
                    return points[index];
                }
            }

            return points.MaxBy(point => point.HorizontalFrictionN) ?? points[0];
        }

        private static double CalculateCoefficient(double frictionForce, double verticalLoad) =>
            Math.Abs(verticalLoad) > 0.0001 ? frictionForce / verticalLoad : 0;

        private async Task RunDeviceCommand(Task command, string successMessage)
        {
            try
            {
                await command;
                CurrentStatus = successMessage;
            }
            catch (Exception ex)
            {
                Log.Error(ex, "设备指令失败：{SuccessMessage}", successMessage);
                CurrentStatus = $"设备指令失败：{ex.Message}";
            }
        }

        private void WriteNumericSetting(string value, Func<double, Task> writer, string label)
        {
            if (isLoadingDeviceSettings || !TryParseDouble(value, out var numericValue))
            {
                return;
            }

            _ = RunDeviceCommand(writer(numericValue), $"{label}已写入 PLC");
        }

        private void SaveAndApplySettings()
        {
            SaveDeviceSettings();
            deviceService.UpdateSettings(CurrentSettings());
        }

        private async Task LoadPlcParametersAsync()
        {
            try
            {
                var parameters = await deviceService.ReadDeviceParametersAsync();
                isLoadingDeviceSettings = true;
                ManualSpeed = parameters.ManualSpeed.ToString("F2", CultureInfo.InvariantCulture);
                ManualDisplacement = parameters.ManualDisplacement.ToString("F2", CultureInfo.InvariantCulture);
                TestSpeed = parameters.TestSpeed.ToString("F2", CultureInfo.InvariantCulture);
                isLoadingDeviceSettings = false;
                SaveAndApplySettings();
            }
            catch (Exception ex)
            {
                isLoadingDeviceSettings = false;
                Log.Warning(ex, "启动时读取 PLC 参数失败，将使用本地保存的设备设置");
            }
        }

        private void LoadDeviceSettings()
        {
            if (!File.Exists(DeviceSettingsPath))
            {
                return;
            }

            try
            {
                var json = File.ReadAllText(DeviceSettingsPath);
                var settings = JsonSerializer.Deserialize<DeviceSettings>(json);
                if (settings is null)
                {
                    return;
                }

                isLoadingDeviceSettings = true;
                ManualSpeed = settings.ManualSpeed ?? ManualSpeed;
                ManualDisplacement = settings.ManualDisplacement ?? ManualDisplacement;
                TestSpeed = settings.TestSpeed ?? TestSpeed;
                NormalPressureZero = settings.NormalPressureZero ?? NormalPressureZero;
                NormalPressureCoefficient = settings.NormalPressureCoefficient ?? NormalPressureCoefficient;
                FrictionZero1 = settings.FrictionZero1 ?? FrictionZero1;
                FrictionCoefficient1 = settings.FrictionCoefficient1 ?? FrictionCoefficient1;
                FrictionZero2 = settings.FrictionZero2 ?? FrictionZero2;
                FrictionCoefficient2 = settings.FrictionCoefficient2 ?? FrictionCoefficient2;
                PlcPortName = settings.PlcPortName ?? PlcPortName;
                AdcPortName = settings.AdcPortName ?? AdcPortName;
                BaudRate = settings.BaudRate > 0 ? settings.BaudRate : BaudRate;
            }
            catch (Exception ex)
            {
                Log.Warning(ex, "读取设备设置失败：Path={Path}", DeviceSettingsPath);
            }
            finally
            {
                isLoadingDeviceSettings = false;
            }
        }

        private void SaveDeviceSettings()
        {
            if (isLoadingDeviceSettings)
            {
                return;
            }

            try
            {
                Directory.CreateDirectory(Path.GetDirectoryName(DeviceSettingsPath)!);
                var json = JsonSerializer.Serialize(CurrentSettings(), new JsonSerializerOptions { WriteIndented = true });
                File.WriteAllText(DeviceSettingsPath, json);
            }
            catch (Exception ex)
            {
                Log.Warning(ex, "保存设备设置失败：Path={Path}", DeviceSettingsPath);
            }
        }

        private DeviceSettings CurrentSettings() =>
            new(
                ManualSpeed,
                ManualDisplacement,
                TestSpeed,
                NormalPressureZero,
                NormalPressureCoefficient,
                FrictionZero1,
                FrictionCoefficient1,
                FrictionZero2,
                FrictionCoefficient2,
                PlcPortName,
                AdcPortName,
                BaudRate);

        private void UpdateTargetLoad()
        {
            TargetLoadText = SelectedShoeSizeIndex switch
            {
                1 => "350 N",
                2 => "160 N",
                _ => "400 N"
            };
        }

        private string CurrentShoeSize() => SelectedShoeSizeIndex switch
        {
            1 => "205-250",
            2 => "205以下",
            _ => "250(含)以上"
        };

        private string CurrentLubricant() => SelectedLubricantIndex switch
        {
            1 => "湿态 - 蒸馏水",
            2 => "湿态 - 洗涤剂",
            3 => "冰霜",
            _ => "干态"
        };

        private string CurrentMode() => SelectedModeIndex switch
        {
            0 => "后跟测试模式",
            1 => "前掌测试模式",
            _ => "水平测试模式"
        };

        private string CurrentSurface() => SelectedSurfaceIndex switch
        {
            1 => "木地板",
            2 => "石材",
            3 => "冰霜表面",
            _ => "瓷砖"
        };

        private static bool TryParseDouble(string value, out double numericValue) =>
            double.TryParse(value, NumberStyles.Float, CultureInfo.InvariantCulture, out numericValue)
            || double.TryParse(value, NumberStyles.Float, CultureInfo.CurrentCulture, out numericValue);

        private static LineSeries<ObservablePoint> CreateLineSeries(
            string name,
            ObservableCollection<ObservablePoint> values,
            string color,
            int yAxis,
            double smoothness) =>
            new()
            {
                Name = name,
                Values = values,
                MiniatureShapeSize = 8,
                MiniatureStrokeThickness = 2,
                Stroke = new SolidColorPaint(SKColor.Parse(color)) { StrokeThickness = 3.2f },
                Fill = new SolidColorPaint(SKColors.Transparent),
                GeometryFill = new SolidColorPaint(SKColors.White),
                GeometryStroke = new SolidColorPaint(SKColor.Parse(color)) { StrokeThickness = 2 },
                GeometrySize = 4,
                LineSmoothness = smoothness,
                ScalesYAt = yAxis
            };

        private static string DeviceSettingsPath =>
            Path.Combine(
                Environment.GetFolderPath(Environment.SpecialFolder.LocalApplicationData),
                "FootwearSlipResistance",
                "device-settings.json");
    }
}