using System;
using System.Collections.ObjectModel;
using System.IO;
using System.Linq;
using System.Text.Json;
using CommunityToolkit.Mvvm.ComponentModel;
using CommunityToolkit.Mvvm.Input;
using LiveChartsCore;
using LiveChartsCore.Defaults;
using LiveChartsCore.SkiaSharpView;
using LiveChartsCore.SkiaSharpView.Painting;
using SkiaSharp;

namespace Footwear_Test_methodsfor_wholeshoe_Slipresistanceperformance.ViewModels
{
    public partial class MainWindowViewModel : ViewModelBase
    {
        private bool isLoadingDeviceSettings;

        [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 = "测试停止，请按“测试”键进行下次试验";

        [ObservableProperty]
        private int uploadProgress = 68;

        [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 normalPressureCoefficient = "0.00";

        [ObservableProperty]
        private string frictionCoefficient1 = "0.00";

        [ObservableProperty]
        private string frictionCoefficient2 = "0.00";

        public string TargetLoadText { get; } = "400 N";
        public string ActualLoadText { get; } = "400 N";
        public string TestSpeedText => $"{TestSpeed} m/s";
        public string SampleRateText { get; } = "30 Hz";
        public string ActiveMode { get; } = "水平模式";
        public string DeviceStatus { get; } = "联机 / 待机";
        public string BatchNumber { get; } = DateTime.Now.ToString("yyyy-MM-dd");
        public string ResultSummary { get; } = "平均 0.62";
        public string UploadProgressText => $"{UploadProgress}%";
        public string StaticCoefficient { get; } = "0.66";
        public string VerticalPressure { get; } = "401.6";
        public string HorizontalForce { get; } = "248.9";
        public string FrictionCoefficient { get; } = "0.62";
        public string Distance { get; } = "218.4";
        public string StandardReference { get; } = "GB/T 3903.6-2024 7.1-8：速度、载荷、三次平均与系数计算";

        public ObservableCollection<TestSample> Samples { get; } =
        [
            new(16, "08:46:35", "0.58", "0.57", "有效"),
            new(15, "08:46:27", "0.71", "0.61", "有效"),
            new(14, "08:46:12", "0.66", "0.66", "有效"),
            new(13, "08:46:04", "0.77", "0.69", "有效"),
            new(12, "08:45:51", "0.62", "0.62", "有效"),
            new(11, "08:45:43", "0.74", "0.64", "有效"),
            new(10, "08:45:28", "0.64", "0.64", "有效"),
            new(9, "08:45:19", "0.73", "0.66", "有效"),
            new(8, "08:45:03", "0.57", "0.56", "有效"),
            new(7, "08:44:49", "0.65", "0.57", "有效"),
            new(6, "08:44:35", "0.56", "0.54", "有效"),
            new(5, "08:44:27", "0.63", "0.56", "有效"),
            new(4, "08:44:09", "0.56", "0.54", "有效"),
            new(3, "08:44:01", "0.63", "0.56", "有效"),
            new(2, "08:43:41", "0.55", "0.52", "有效"),
            new(1, "08:43:33", "0.62", "0.55", "有效"),
        ];

        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; } =
        [
            new LineSeries<ObservablePoint>
            {
                Name = "垂直压力(N)",
                Values = CreatePressureSeries(),
                MiniatureShapeSize = 8,
                MiniatureStrokeThickness = 2,
                Stroke = new SolidColorPaint(SKColor.Parse("#DC2626")) { StrokeThickness = 3.6f },
                Fill = new SolidColorPaint(new SKColor(220, 38, 38, 18)),
                GeometryFill = new SolidColorPaint(SKColors.White),
                GeometryStroke = new SolidColorPaint(SKColor.Parse("#DC2626")) { StrokeThickness = 2 },
                GeometrySize = 5,
                LineSmoothness = 0.65,
                ScalesYAt = 0
            },
            new LineSeries<ObservablePoint>
            {
                Name = "水平拉力(N)",
                Values = CreatePullSeries(),
                MiniatureShapeSize = 8,
                MiniatureStrokeThickness = 2,
                Stroke = new SolidColorPaint(SKColor.Parse("#16A34A")) { StrokeThickness = 3.4f },
                Fill = new SolidColorPaint(new SKColor(22, 163, 74, 16)),
                GeometryFill = new SolidColorPaint(SKColors.White),
                GeometryStroke = new SolidColorPaint(SKColor.Parse("#16A34A")) { StrokeThickness = 2 },
                GeometrySize = 5,
                LineSmoothness = 0.65,
                ScalesYAt = 0
            },
            new LineSeries<ObservablePoint>
            {
                Name = "摩擦系数",
                Values = CreateFrictionSeries(),
                MiniatureShapeSize = 8,
                MiniatureStrokeThickness = 2,
                Stroke = new SolidColorPaint(SKColor.Parse("#C026D3")) { StrokeThickness = 3.4f },
                Fill = new SolidColorPaint(new SKColor(192, 38, 211, 16)),
                GeometryFill = new SolidColorPaint(SKColors.White),
                GeometryStroke = new SolidColorPaint(SKColor.Parse("#C026D3")) { StrokeThickness = 2 },
                GeometrySize = 5,
                LineSmoothness = 0.65,
                ScalesYAt = 1
            },
            new LineSeries<ObservablePoint>
            {
                Name = "距离(mm)",
                Values = CreateDistanceSeries(),
                MiniatureShapeSize = 8,
                MiniatureStrokeThickness = 2,
                Stroke = new SolidColorPaint(SKColor.Parse("#2563EB")) { StrokeThickness = 3.2f },
                Fill = new SolidColorPaint(new SKColor(37, 99, 235, 14)),
                GeometryFill = new SolidColorPaint(SKColors.White),
                GeometryStroke = new SolidColorPaint(SKColor.Parse("#2563EB")) { StrokeThickness = 2 },
                GeometrySize = 5,
                LineSmoothness = 0.35,
                ScalesYAt = 0
            }
        ];

        public Axis[] XAxes { get; } =
        [
            new Axis
            {
                Name = "时间(s)",
                MinLimit = -0.10,
                MaxLimit = 0.62,
                UnitWidth = 0.05,
                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 / 拉力 / 距离",
                MinLimit = 0,
                MaxLimit = 800,
                UnitWidth = 50,
                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,
                MaxLimit = 1.5,
                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()
        {
            LoadDeviceSettings();
        }

        [RelayCommand]
        private void Clear()
        {
            UploadProgress = 0;
            CurrentStatus = "传感器已清零，垂直压力与水平拉力基线重置完成";
        }

        [RelayCommand]
        private void Preload()
        {
            UploadProgress = 34;
            CurrentStatus = "预压中：0.2s 内施加目标垂直载荷，等待滑动动作";
        }

        [RelayCommand]
        private void StartTest()
        {
            UploadProgress = 86;
            CurrentStatus = "测试运行：正在采集峰值静摩擦力与 0.3s-0.6s 动摩擦力";
        }

        [RelayCommand]
        private void StopTest()
        {
            UploadProgress = 68;
            CurrentStatus = "测试停止，请按“测试”键进行下次试验";
        }

        [RelayCommand]
        private void ExportReport()
        {
            UploadProgress = 100;
            CurrentStatus = "报告数据已整理：三次平均、静/动摩擦系数与试验条件可导出";
        }

        [RelayCommand]
        private void LiftFast() => CurrentStatus = "垂直架快速上升";

        [RelayCommand]
        private void Lift() => CurrentStatus = "垂直架提升";

        [RelayCommand]
        private void Lower() => CurrentStatus = "垂直架下降";

        [RelayCommand]
        private void LowerFast() => CurrentStatus = "垂直架快速下降";

        [RelayCommand]
        private void MoveLeft() => CurrentStatus = "水平板向左移动";

        [RelayCommand]
        private void MoveRight() => CurrentStatus = "水平板向右移动";

        [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);
            CurrentStatus = $"已删除序号 {SelectedSampleIndex} 的实验数据";
        }

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

        [RelayCommand]
        private void CloseSettingsDialog()
        {
            IsSettingsDialogOpen = false;
        }

        partial void OnUploadProgressChanged(int value)
        {
            OnPropertyChanged(nameof(UploadProgressText));
        }

        partial void OnManualSpeedChanged(string value) => SaveDeviceSettings();

        partial void OnManualDisplacementChanged(string value) => SaveDeviceSettings();

        partial void OnTestSpeedChanged(string value)
        {
            OnPropertyChanged(nameof(TestSpeedText));
            SaveDeviceSettings();
        }

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

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

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

        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;
                NormalPressureCoefficient = settings.NormalPressureCoefficient ?? NormalPressureCoefficient;
                FrictionCoefficient1 = settings.FrictionCoefficient1 ?? FrictionCoefficient1;
                FrictionCoefficient2 = settings.FrictionCoefficient2 ?? FrictionCoefficient2;
            }
            catch
            {
            }
            finally
            {
                isLoadingDeviceSettings = false;
            }
        }

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

            try
            {
                Directory.CreateDirectory(Path.GetDirectoryName(DeviceSettingsPath)!);
                var settings = new DeviceSettings(
                    ManualSpeed,
                    ManualDisplacement,
                    TestSpeed,
                    NormalPressureCoefficient,
                    FrictionCoefficient1,
                    FrictionCoefficient2);
                var json = JsonSerializer.Serialize(settings, new JsonSerializerOptions { WriteIndented = true });
                File.WriteAllText(DeviceSettingsPath, json);
            }
            catch
            {
            }
        }

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

        private static ObservablePoint[] CreatePressureSeries() =>
        [
            new(-0.10, 36), new(-0.08, 42), new(-0.06, 50), new(-0.04, 90),
            new(-0.02, 400), new(0.00, 405), new(0.05, 407), new(0.10, 409),
            new(0.20, 407), new(0.30, 412), new(0.40, 421), new(0.50, 426),
            new(0.62, 430)
        ];

        private static ObservablePoint[] CreatePullSeries() =>
        [
            new(-0.10, 0), new(-0.05, 0), new(0.00, 160), new(0.04, 226),
            new(0.08, 232), new(0.16, 236), new(0.26, 241), new(0.36, 248),
            new(0.46, 255), new(0.56, 260), new(0.62, 266)
        ];

        private static ObservablePoint[] CreateFrictionSeries() =>
        [
            new(-0.10, 0), new(-0.02, 0), new(0.00, 0.47), new(0.04, 0.55),
            new(0.08, 0.57), new(0.16, 0.56), new(0.26, 0.58), new(0.36, 0.59),
            new(0.46, 0.60), new(0.56, 0.61), new(0.62, 0.62)
        ];

        private static ObservablePoint[] CreateDistanceSeries() =>
        [
            new(-0.10, 0), new(0.00, 0), new(0.06, 20), new(0.12, 42),
            new(0.20, 72), new(0.30, 108), new(0.40, 145), new(0.50, 178),
            new(0.62, 218)
        ];
    }

    public sealed record TestSample(
        int Index,
        string Time,
        string StaticCoefficient,
        string DynamicCoefficient,
        string Verdict);

    internal sealed record DeviceSettings(
        string ManualSpeed,
        string ManualDisplacement,
        string TestSpeed,
        string NormalPressureCoefficient,
        string FrictionCoefficient1,
        string FrictionCoefficient2);
}