// This Source Code Form is subject to the terms of the Mozilla Public License, v. 2.0.
// If a copy of the MPL was not distributed with this file, You can obtain one at http://mozilla.org/MPL/2.0/.
// Copyright (C) LibreHardwareMonitor and Contributors.

using System;
using System.Collections.Generic;
using System.Collections.Specialized;
using System.Globalization;
using System.IO;
using System.Linq;
using System.Net;
using System.Net.Sockets;
using System.Threading.Tasks;
using LibreHardwareMonitor.Hardware;
using LibreHardwareMonitor.Windows.WinUI.Services;
using LibreHardwareMonitor.Windows.WinUI.ViewModels;
using Microsoft.UI;
using Microsoft.UI.Dispatching;
using Microsoft.UI.Windowing;
using Microsoft.UI.Xaml;
using Microsoft.UI.Xaml.Controls;
using Microsoft.UI.Xaml.Controls.Primitives;
using Microsoft.UI.Xaml.Data;
using Microsoft.UI.Xaml.Input;
using Microsoft.UI.Xaml.Markup;
using Microsoft.UI.Xaml.Media;
using Microsoft.UI.Xaml.Shapes;
using Windows.Graphics;
using Windows.Storage;
using Windows.Storage.Pickers;
using WinRT.Interop;
using IOPath = System.IO.Path;

namespace LibreHardwareMonitor.Windows.WinUI;

public sealed class MainWindow : Window
{
    private const double SensorColumnPadding = 72;
    private const double SensorTreeIndentWidth = 20;
    private const double ValueColumnPadding = 18;

    private readonly AppWindow _appWindow;
    private readonly Grid _contentGrid;
    private readonly DispatcherQueueTimer _timer;
    private readonly Canvas _plotCanvas;
    private readonly Grid _plotPane;
    private readonly Grid _rootGrid;
    private readonly TreeView _sensorTree;
    private readonly Grid _sensorPane;
    private readonly List<Grid> _sensorRowGrids = [];
    private readonly double[] _sensorColumnWidths = [320, 120, 120, 120];
    private Grid? _sensorHeader;
    private bool _isUpdating;
    private bool _isMonitoringStarted;

    public MainWindow()
    {
        AppSettings settings = AppSettings.LoadDefault();
        ViewModel = new MainWindowViewModel(settings);

        IntPtr hwnd = WindowNative.GetWindowHandle(this);
        WindowId windowId = Win32Interop.GetWindowIdFromWindow(hwnd);
        _appWindow = AppWindow.GetFromWindowId(windowId);
        _appWindow.Title = "Libre Hardware Monitor";

        Grid root = BuildRoot();
        Content = root;
        _rootGrid = root;

        _contentGrid = (Grid)root.Children[1];
        _sensorPane = (Grid)_contentGrid.Children[0];
        _plotPane = (Grid)_contentGrid.Children[1];
        _sensorTree = (TreeView)((Grid)_sensorPane.Children[1]).Children[0];
        _plotCanvas = (Canvas)_plotPane.Children[1];

        RestoreWindowBounds();
        MaximizeWindow();
        ApplyTheme();
        UpdatePlotLayout();

        _timer = DispatcherQueue.CreateTimer();
        _timer.Interval = ViewModel.UpdateInterval;
        _timer.Tick += UpdateTimer_Tick;

        ViewModel.PropertyChanged += (_, args) =>
        {
            if (args.PropertyName is nameof(ViewModel.UpdateInterval) or nameof(ViewModel.UpdateIntervalIndex))
                _timer.Interval = ViewModel.UpdateInterval;

            if (args.PropertyName is nameof(ViewModel.ShowPlot)
                or nameof(ViewModel.PlotLocation)
                or nameof(ViewModel.PlotGridColumn)
                or nameof(ViewModel.PlotGridRow))
                UpdatePlotLayout();

            if (args.PropertyName == nameof(ViewModel.ShowHiddenSensors))
                RebuildSensorTree();

            if (args.PropertyName is nameof(ViewModel.ShowValueColumn)
                or nameof(ViewModel.ShowMinColumn)
                or nameof(ViewModel.ShowMaxColumn))
                UpdateSensorColumnWidths();

            if (args.PropertyName == nameof(ViewModel.ThemeMode))
                ApplyTheme();
        };
        ViewModel.RootItems.CollectionChanged += RootItems_CollectionChanged;
        ViewModel.PlotInvalidated += (_, _) => DrawPlot();

        Closed += MainWindow_Closed;

    }

    public MainWindowViewModel ViewModel { get; }

    public void StartMonitoringAfterActivation()
    {
        DispatcherQueue.TryEnqueue(async () =>
        {
            if (_isMonitoringStarted)
                return;

            _isMonitoringStarted = true;
            try
            {
                await Task.Delay(250);
                await ViewModel.StartAsync();
                RebuildSensorTree();
                _timer.Start();
            }
            catch (Exception ex)
            {
                RecordRuntimeError("Hardware initialization failed", ex);
            }
        });
    }

    private Grid BuildRoot()
    {
        Grid root = new()
        {
            Background = new SolidColorBrush(Colors.White),
            RowDefinitions =
            {
                new RowDefinition { Height = GridLength.Auto },
                new RowDefinition { Height = new GridLength(1, GridUnitType.Star) },
                new RowDefinition { Height = GridLength.Auto }
            }
        };

        root.Children.Add(BuildMenuBar());

        Grid contentGrid = new()
        {
            ColumnDefinitions =
            {
                new ColumnDefinition { Width = new GridLength(1, GridUnitType.Star) },
                new ColumnDefinition { Width = new GridLength(320) }
            },
            RowDefinitions =
            {
                new RowDefinition { Height = new GridLength(1, GridUnitType.Star) },
                new RowDefinition { Height = new GridLength(220) }
            }
        };
        Grid.SetRow(contentGrid, 1);

        contentGrid.Children.Add(BuildSensorPane());
        contentGrid.Children.Add(BuildPlotPane());
        root.Children.Add(contentGrid);

        TextBlock statusText = new()
        {
            Padding = new Thickness(8, 4, 8, 4),
            TextTrimming = TextTrimming.CharacterEllipsis
        };
        Bind(statusText, TextBlock.TextProperty, ViewModel, nameof(ViewModel.StatusText));
        Grid.SetRow(statusText, 2);
        root.Children.Add(statusText);

        return root;
    }

    private MenuBar BuildMenuBar()
    {
        MenuBar menuBar = new();

        MenuBarItem file = new() { Title = "File" };
        file.Items.Add(CreateMenuItem("Save Report...", async (_, _) => await SaveReportAsync()));
        file.Items.Add(new MenuFlyoutSeparator());
        file.Items.Add(CreateMenuItem("Reset", (_, _) => ViewModel.ResetHardware()));
        MenuFlyoutSubItem hardware = new() { Text = "Hardware" };
        hardware.Items.Add(CreateToggleItem("Motherboard", nameof(ViewModel.IsMotherboardEnabled)));
        hardware.Items.Add(CreateToggleItem("CPU", nameof(ViewModel.IsCpuEnabled)));
        hardware.Items.Add(CreateToggleItem("Memory", nameof(ViewModel.IsMemoryEnabled)));
        hardware.Items.Add(CreateToggleItem("GPU", nameof(ViewModel.IsGpuEnabled)));
        hardware.Items.Add(CreateToggleItem("Power Monitors", nameof(ViewModel.IsPowerMonitorEnabled)));
        hardware.Items.Add(CreateToggleItem("Fan Controllers", nameof(ViewModel.IsControllerEnabled)));
        hardware.Items.Add(CreateToggleItem("Storage Devices", nameof(ViewModel.IsStorageEnabled)));
        hardware.Items.Add(CreateToggleItem("Network", nameof(ViewModel.IsNetworkEnabled)));
        hardware.Items.Add(CreateToggleItem("Power Supplies", nameof(ViewModel.IsPsuEnabled)));
        hardware.Items.Add(CreateToggleItem("Battery", nameof(ViewModel.IsBatteryEnabled)));
        file.Items.Add(hardware);
        file.Items.Add(new MenuFlyoutSeparator());
        file.Items.Add(CreateMenuItem("Exit", (_, _) => Close()));
        menuBar.Items.Add(file);

        MenuBarItem view = new() { Title = "View" };
        view.Items.Add(CreateMenuItem("Reset Min/Max", (_, _) => ViewModel.ResetMinMax()));
        view.Items.Add(CreateMenuItem("Expand All Nodes", (_, _) =>
        {
            ViewModel.SetAllExpanded(true);
            RebuildSensorTree();
        }));
        view.Items.Add(CreateMenuItem("Collapse All Nodes", (_, _) =>
        {
            ViewModel.SetAllExpanded(false);
            RebuildSensorTree();
        }));
        view.Items.Add(CreateMenuItem("Reset Plot", (_, _) => ResetPlot()));
        view.Items.Add(new MenuFlyoutSeparator());
        view.Items.Add(CreateToggleItem("Show Hidden Sensors", nameof(ViewModel.ShowHiddenSensors)));
        view.Items.Add(CreateToggleItem("Show Plot", nameof(ViewModel.ShowPlot)));
        MenuFlyoutSubItem columns = new() { Text = "Columns" };
        columns.Items.Add(CreateToggleItem("Value", nameof(ViewModel.ShowValueColumn)));
        columns.Items.Add(CreateToggleItem("Min", nameof(ViewModel.ShowMinColumn)));
        columns.Items.Add(CreateToggleItem("Max", nameof(ViewModel.ShowMaxColumn)));
        view.Items.Add(columns);
        menuBar.Items.Add(view);

        MenuBarItem options = new() { Title = "Options" };
        options.Items.Add(CreateToggleItem("Start Minimized", nameof(ViewModel.StartMinimized)));
        options.Items.Add(CreateToggleItem("Minimize To Tray", nameof(ViewModel.MinimizeToTray)));
        options.Items.Add(CreateToggleItem("Minimize On Close", nameof(ViewModel.MinimizeOnClose)));
        options.Items.Add(CreateToggleItem("Run On Windows Startup", nameof(ViewModel.RunOnStartup)));
        options.Items.Add(new MenuFlyoutSeparator());
        options.Items.Add(BuildRadioSubMenu("Temperature Unit", [
            ("Celsius", TemperatureUnit.Celsius),
            ("Fahrenheit", TemperatureUnit.Fahrenheit)
        ], () => ViewModel.TemperatureUnit, value => ViewModel.TemperatureUnit = value));
        options.Items.Add(BuildRadioSubMenu("Plot Location", [
            ("Bottom", PlotLocation.Bottom),
            ("Right", PlotLocation.Right)
        ], () => ViewModel.PlotLocation, value => ViewModel.PlotLocation = value));
        options.Items.Add(BuildRadioSubMenu("Theme", [
            ("Auto", AppThemeMode.Auto),
            ("Light", AppThemeMode.Light),
            ("Dark", AppThemeMode.Dark),
            ("Black", AppThemeMode.Black)
        ], () => ViewModel.ThemeMode, value => ViewModel.ThemeMode = value));
        options.Items.Add(BuildIndexedSubMenu("Stroke Thickness", [
            ("1pt", 1),
            ("2pt", 2),
            ("3pt", 3),
            ("4pt", 4)
        ], () => (int)ViewModel.PlotStrokeThickness, value => ViewModel.PlotStrokeThickness = value));
        options.Items.Add(new MenuFlyoutSeparator());
        options.Items.Add(CreateToggleItem("Log Sensors", nameof(ViewModel.LogSensors)));
        options.Items.Add(CreateToggleItem("Force Drive Wakeup", nameof(ViewModel.ForceDriveWakeup)));
        options.Items.Add(CreateToggleItem("Throttle ATA Storage", nameof(ViewModel.ThrottleAtaUpdate)));
        options.Items.Add(BuildRadioSubMenu("File Rotation Method", [
            ("Per Session", LoggerFileRotation.PerSession),
            ("Daily", LoggerFileRotation.Daily)
        ], () => ViewModel.FileRotationMethod, value => ViewModel.FileRotationMethod = value));
        options.Items.Add(BuildIndexedSubMenu("Update Interval", [
            ("250ms", 0),
            ("500ms", 1),
            ("1s", 2),
            ("2s", 3),
            ("5s", 4),
            ("10s", 5)
        ], () => ViewModel.UpdateIntervalIndex, value => ViewModel.UpdateIntervalIndex = value));
        options.Items.Add(BuildIndexedSubMenu("Logging Interval", [
            ("1s", 0),
            ("2s", 1),
            ("5s", 2),
            ("10s", 3),
            ("30s", 4),
            ("1min", 5),
            ("2min", 6),
            ("5min", 7),
            ("10min", 8),
            ("30min", 9),
            ("1h", 10),
            ("2h", 11),
            ("6h", 12)
        ], () => ViewModel.LoggingIntervalIndex, value => ViewModel.LoggingIntervalIndex = value));
        options.Items.Add(BuildIndexedSubMenu("Sensor Values Time Window", [
            ("30s", 0),
            ("1min", 1),
            ("2min", 2),
            ("5min", 3),
            ("10min", 4),
            ("30min", 5),
            ("1h", 6),
            ("2h", 7),
            ("6h", 8),
            ("12h", 9),
            ("24h", 10)
        ], () => ViewModel.SensorValuesTimeWindowIndex, value => ViewModel.SensorValuesTimeWindowIndex = value));
        options.Items.Add(new MenuFlyoutSeparator());
        MenuFlyoutSubItem webServer = new() { Text = "Remote Web Server" };
        ToggleMenuFlyoutItem runWebServer = CreateToggleItem("Run", nameof(ViewModel.RunWebServer));
        runWebServer.IsEnabled = !ViewModel.IsWebServerUnavailable;
        webServer.Items.Add(runWebServer);
        MenuFlyoutItem interfacePort = CreateMenuItem("Interface / Port", async (_, _) => await ShowWebServerSettingsAsync());
        interfacePort.IsEnabled = !ViewModel.IsWebServerUnavailable;
        webServer.Items.Add(interfacePort);
        MenuFlyoutItem authentication = CreateMenuItem("Authentication", async (_, _) => await ShowWebServerAuthenticationAsync());
        authentication.IsEnabled = !ViewModel.IsWebServerUnavailable;
        webServer.Items.Add(authentication);
        options.Items.Add(webServer);
        menuBar.Items.Add(options);

        MenuBarItem help = new() { Title = "Help" };
        help.Items.Add(CreateMenuItem("About", async (_, _) => await ShowAboutAsync()));
        menuBar.Items.Add(help);

        return menuBar;
    }

    private Grid BuildSensorPane()
    {
        Grid pane = new()
        {
            RowDefinitions =
            {
                new RowDefinition { Height = GridLength.Auto },
                new RowDefinition { Height = new GridLength(1, GridUnitType.Star) }
            }
        };

        Grid header = CreateSensorRowGrid();
        _sensorHeader = header;
        header.Padding = new Thickness(8, 5, 8, 5);
        header.Background = (Brush)Application.Current.Resources["SystemControlBackgroundChromeMediumLowBrush"];
        header.Children.Add(CreateHeaderText("Sensor", 0, Visibility.Visible));
        header.Children.Add(CreateHeaderText("Value", 1, ViewModel.ValueColumnVisibility, nameof(ViewModel.ValueColumnVisibility)));
        header.Children.Add(CreateHeaderText("Min", 2, ViewModel.MinColumnVisibility, nameof(ViewModel.MinColumnVisibility)));
        header.Children.Add(CreateHeaderText("Max", 3, ViewModel.MaxColumnVisibility, nameof(ViewModel.MaxColumnVisibility)));
        pane.Children.Add(header);

        Grid treeHost = new();
        Grid.SetRow(treeHost, 1);
        TreeView tree = new()
        {
            ItemTemplate = CreateTreeViewNodeContentTemplate(),
            SelectionMode = TreeViewSelectionMode.Single
        };
        tree.SelectionChanged += SensorTree_SelectionChanged;
        treeHost.Children.Add(tree);
        pane.Children.Add(treeHost);

        return pane;
    }

    private Grid BuildPlotPane()
    {
        Grid pane = new()
        {
            Padding = new Thickness(8),
            BorderBrush = (Brush)Application.Current.Resources["SystemControlForegroundBaseLowBrush"],
            BorderThickness = new Thickness(1, 0, 0, 0),
            RowDefinitions =
            {
                new RowDefinition { Height = GridLength.Auto },
                new RowDefinition { Height = new GridLength(1, GridUnitType.Star) }
            }
        };

        Grid toolbar = new()
        {
            ColumnDefinitions =
            {
                new ColumnDefinition { Width = new GridLength(1, GridUnitType.Star) },
                new ColumnDefinition { Width = GridLength.Auto }
            }
        };
        toolbar.Children.Add(new TextBlock { Text = "Plot", FontWeight = new global::Windows.UI.Text.FontWeight { Weight = 600 }, VerticalAlignment = VerticalAlignment.Center });
        Button reset = new() { Content = "Reset" };
        reset.Click += (_, _) => ResetPlot();
        Grid.SetColumn(reset, 1);
        toolbar.Children.Add(reset);
        pane.Children.Add(toolbar);

        Canvas canvas = new()
        {
            MinHeight = 160,
            Background = (Brush)Application.Current.Resources["SystemControlBackgroundAltHighBrush"]
        };
        canvas.SizeChanged += (_, _) => DrawPlot();
        Grid.SetRow(canvas, 1);
        pane.Children.Add(canvas);

        return pane;
    }

    private void RootItems_CollectionChanged(object? sender, NotifyCollectionChangedEventArgs e)
    {
        RebuildSensorTree();
    }

    private async void UpdateTimer_Tick(DispatcherQueueTimer sender, object args)
    {
        if (_isUpdating)
            return;

        _isUpdating = true;
        try
        {
            await ViewModel.UpdateAsync();
            UpdateSensorColumnWidths();
            DrawPlot();
        }
        catch (Exception ex)
        {
            _timer.Stop();
            RecordRuntimeError("Sensor update failed", ex);
        }
        finally
        {
            _isUpdating = false;
        }
    }

    private void RecordRuntimeError(string message, Exception exception)
    {
        string logPath = IOPath.Combine(AppContext.BaseDirectory, "LibreHardwareMonitor.Windows.WinUI.startup.log");
        File.WriteAllText(logPath, exception.ToString());
        ViewModel.SetStatusText($"{message}. See {IOPath.GetFileName(logPath)}.");
    }

    private void MainWindow_Closed(object sender, WindowEventArgs args)
    {
        _timer.Stop();
        SaveWindowBounds();
        ViewModel.Dispose();
    }

    private void RebuildSensorTree()
    {
        if (_sensorTree == null)
            return;

        _sensorRowGrids.Clear();
        _sensorTree.RootNodes.Clear();
        foreach (SensorTreeItemViewModel item in ViewModel.RootItems)
        {
            TreeViewNode? node = CreateTreeNode(item);
            if (node != null)
                _sensorTree.RootNodes.Add(node);
        }

        UpdateSensorColumnWidths();
    }

    private static DataTemplate CreateTreeViewNodeContentTemplate()
    {
        const string xaml = """
            <DataTemplate xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation">
                <ContentPresenter Content="{Binding Content}" />
            </DataTemplate>
            """;

        return (DataTemplate)XamlReader.Load(xaml);
    }

    private TreeViewNode? CreateTreeNode(SensorTreeItemViewModel item)
    {
        if (item.RowVisibility == Visibility.Collapsed)
            return null;

        TreeViewNode node = new()
        {
            Content = CreateSensorRow(item),
            IsExpanded = item.IsExpanded
        };

        foreach (SensorTreeItemViewModel child in item.Children)
        {
            TreeViewNode? childNode = CreateTreeNode(child);
            if (childNode != null)
                node.Children.Add(childNode);
        }

        return node;
    }

    private FrameworkElement CreateSensorRow(SensorTreeItemViewModel item)
    {
        Grid row = CreateSensorRowGrid();
        _sensorRowGrids.Add(row);
        row.DataContext = item;
        row.Padding = new Thickness(0, 3, 0, 3);

        StackPanel sensorCell = new() { Orientation = Orientation.Horizontal, Spacing = 6 };
        CheckBox plotCheck = new() { MinWidth = 22 };
        Bind(plotCheck, ToggleButton.IsCheckedProperty, item, nameof(SensorTreeItemViewModel.Plot), BindingMode.TwoWay);
        Bind(plotCheck, UIElement.VisibilityProperty, item, nameof(SensorTreeItemViewModel.PlotCheckVisibility));
        sensorCell.Children.Add(plotCheck);

        FontIcon icon = new() { FontSize = 14 };
        Bind(icon, FontIcon.GlyphProperty, item, nameof(SensorTreeItemViewModel.IconGlyph));
        sensorCell.Children.Add(icon);

        TextBlock name = new() { TextTrimming = TextTrimming.CharacterEllipsis };
        Bind(name, TextBlock.TextProperty, item, nameof(SensorTreeItemViewModel.Text));
        ToolTip toolTip = new();
        Bind(toolTip, ContentControl.ContentProperty, item, nameof(SensorTreeItemViewModel.ToolTip));
        ToolTipService.SetToolTip(name, toolTip);
        sensorCell.Children.Add(name);

        row.Children.Add(sensorCell);
        row.Children.Add(CreateValueTextBlock(item, nameof(SensorTreeItemViewModel.Value), nameof(SensorTreeItemViewModel.ValueColumnVisibility), 1));
        row.Children.Add(CreateValueTextBlock(item, nameof(SensorTreeItemViewModel.Min), nameof(SensorTreeItemViewModel.MinColumnVisibility), 2));
        row.Children.Add(CreateValueTextBlock(item, nameof(SensorTreeItemViewModel.Max), nameof(SensorTreeItemViewModel.MaxColumnVisibility), 3));

        row.ContextFlyout = BuildSensorContextMenu(item);
        return row;
    }

    private MenuFlyout BuildSensorContextMenu(SensorTreeItemViewModel item)
    {
        MenuFlyout flyout = new();
        if (item.Sensor?.Parameters.Count > 0)
            flyout.Items.Add(CreateMenuItem("Parameters...", async (_, _) => await ShowParametersAsync(item)));

        MenuFlyoutItem rename = CreateMenuItem("Rename", async (_, _) => await RenameNodeAsync(item));
        rename.IsEnabled = item.CanRename;
        flyout.Items.Add(rename);

        ToggleMenuFlyoutItem plot = new() { Text = "Show in Plot", IsEnabled = item.Sensor != null };
        Bind(plot, ToggleMenuFlyoutItem.IsCheckedProperty, item, nameof(SensorTreeItemViewModel.Plot), BindingMode.TwoWay);
        flyout.Items.Add(plot);

        MenuFlyoutItem hide = CreateMenuItem(item.IsVisible ? "Hide Sensor" : "Unhide Sensor", (_, _) =>
        {
            if (item.CanHide)
            {
                item.IsVisible = !item.IsVisible;
                RebuildSensorTree();
            }
        });
        hide.IsEnabled = item.CanHide;
        flyout.Items.Add(hide);
        flyout.Items.Add(new MenuFlyoutSeparator());
        MenuFlyoutItem penColor = CreateMenuItem("Pen Color...", async (_, _) => await ShowPenColorAsync(item));
        penColor.IsEnabled = item.Sensor != null;
        flyout.Items.Add(penColor);
        MenuFlyoutItem resetPenColor = CreateMenuItem("Reset Pen Color", (_, _) => ViewModel.SetSensorPenColor(item, null));
        resetPenColor.IsEnabled = item.PenColor != null;
        flyout.Items.Add(resetPenColor);

        if (item.Sensor?.Control != null)
        {
            flyout.Items.Add(new MenuFlyoutSeparator());
            flyout.Items.Add(BuildControlMenu(item.Sensor.Control));
        }

        flyout.Items.Add(new MenuFlyoutSeparator());
        flyout.Items.Add(CreateMenuItem("Reset Min/Max", (_, _) => ViewModel.ResetMinMax()));
        return flyout;
    }

    private static MenuFlyoutSubItem BuildControlMenu(IControl control)
    {
        MenuFlyoutSubItem controlItem = new() { Text = "Control" };
        ToggleMenuFlyoutItem defaultItem = new() { Text = "Default", IsChecked = control.ControlMode == ControlMode.Default };
        defaultItem.Click += (_, _) => control.SetDefault();
        controlItem.Items.Add(defaultItem);

        MenuFlyoutSubItem manual = new() { Text = "Manual" };
        for (int value = 0; value <= 100; value += 5)
        {
            if (value > control.MaxSoftwareValue || value < control.MinSoftwareValue)
                continue;

            int controlValue = value;
            ToggleMenuFlyoutItem item = new()
            {
                Text = $"{controlValue} %",
                IsChecked = control.ControlMode == ControlMode.Software && Math.Abs(control.SoftwareValue - controlValue) < 0.1f
            };
            item.Click += (_, _) => control.SetSoftware(controlValue);
            manual.Items.Add(item);
        }

        controlItem.Items.Add(manual);
        return controlItem;
    }

    private async Task RenameNodeAsync(SensorTreeItemViewModel item)
    {
        if (!item.CanRename)
            return;

        TextBox nameTextBox = new() { Text = item.Text, SelectionStart = 0, SelectionLength = item.Text.Length };
        ContentDialog dialog = new()
        {
            XamlRoot = Content.XamlRoot,
            Title = "Rename Sensor",
            Content = nameTextBox,
            PrimaryButtonText = "Save",
            CloseButtonText = "Cancel",
            DefaultButton = ContentDialogButton.Primary
        };

        if (await dialog.ShowAsync() == ContentDialogResult.Primary)
            item.Text = nameTextBox.Text.Trim();
    }

    private async Task ShowPenColorAsync(SensorTreeItemViewModel item)
    {
        if (item.Sensor == null)
            return;

        ColorPicker picker = new()
        {
            Color = item.PenColor ?? global::Windows.UI.Color.FromArgb(255, 0, 120, 212),
            IsAlphaEnabled = false,
            IsColorSliderVisible = true,
            IsColorChannelTextInputVisible = true,
            IsHexInputVisible = true
        };

        ContentDialog dialog = new()
        {
            XamlRoot = Content.XamlRoot,
            Title = "Pen Color",
            Content = picker,
            PrimaryButtonText = "Save",
            CloseButtonText = "Cancel",
            DefaultButton = ContentDialogButton.Primary
        };

        if (await dialog.ShowAsync() == ContentDialogResult.Primary)
            ViewModel.SetSensorPenColor(item, picker.Color);
    }

    private async Task ShowParametersAsync(SensorTreeItemViewModel item)
    {
        if (item.Sensor == null || item.Sensor.Parameters.Count == 0)
            return;

        StackPanel panel = new() { Spacing = 10 };
        TextBlock caption = new()
        {
            Text = item.Sensor.Name,
            FontWeight = new global::Windows.UI.Text.FontWeight { Weight = 600 },
            TextWrapping = TextWrapping.Wrap
        };
        panel.Children.Add(caption);

        ParameterEditorRow[] rows = item.Sensor.Parameters.Select(CreateParameterEditorRow).ToArray();
        foreach (ParameterEditorRow row in rows)
            panel.Children.Add(row.Container);

        ContentDialog dialog = new()
        {
            XamlRoot = Content.XamlRoot,
            Title = "Parameters",
            Content = new ScrollViewer { Content = panel, MaxHeight = 520 },
            PrimaryButtonText = "OK",
            CloseButtonText = "Cancel",
            DefaultButton = ContentDialogButton.Primary
        };
        dialog.PrimaryButtonClick += (sender, args) =>
        {
            foreach (ParameterEditorRow row in rows)
            {
                if (row.UseDefault.IsChecked == true)
                    continue;

                if (!float.TryParse(row.Value.Text, NumberStyles.Float, CultureInfo.CurrentCulture, out float _)
                    && !float.TryParse(row.Value.Text, NumberStyles.Float, CultureInfo.InvariantCulture, out float _))
                {
                    row.Value.Header = "Invalid value";
                    args.Cancel = true;
                    return;
                }
            }

            foreach (ParameterEditorRow row in rows)
            {
                if (row.UseDefault.IsChecked == true)
                    row.Parameter.IsDefault = true;
                else if (float.TryParse(row.Value.Text, NumberStyles.Float, CultureInfo.CurrentCulture, out float currentCultureValue)
                         || float.TryParse(row.Value.Text, NumberStyles.Float, CultureInfo.InvariantCulture, out currentCultureValue))
                    row.Parameter.Value = currentCultureValue;
            }
        };

        await dialog.ShowAsync();
    }

    private static ParameterEditorRow CreateParameterEditorRow(IParameter parameter)
    {
        Grid grid = new()
        {
            ColumnDefinitions =
            {
                new ColumnDefinition { Width = new GridLength(1, GridUnitType.Star) },
                new ColumnDefinition { Width = GridLength.Auto },
                new ColumnDefinition { Width = new GridLength(120) }
            },
            RowDefinitions =
            {
                new RowDefinition { Height = GridLength.Auto },
                new RowDefinition { Height = GridLength.Auto }
            },
            ColumnSpacing = 8
        };

        TextBlock name = new()
        {
            Text = parameter.Name,
            VerticalAlignment = VerticalAlignment.Center,
            TextWrapping = TextWrapping.Wrap
        };
        grid.Children.Add(name);

        CheckBox useDefault = new()
        {
            Content = "Default",
            IsChecked = parameter.IsDefault,
            VerticalAlignment = VerticalAlignment.Center
        };
        Grid.SetColumn(useDefault, 1);
        grid.Children.Add(useDefault);

        TextBox value = new()
        {
            Text = parameter.Value.ToString(CultureInfo.CurrentCulture),
            IsEnabled = !parameter.IsDefault
        };
        Grid.SetColumn(value, 2);
        grid.Children.Add(value);

        TextBlock description = new()
        {
            Text = parameter.Description,
            Opacity = 0.72,
            TextWrapping = TextWrapping.Wrap
        };
        Grid.SetRow(description, 1);
        Grid.SetColumnSpan(description, 3);
        grid.Children.Add(description);

        useDefault.Checked += (_, _) => value.IsEnabled = false;
        useDefault.Unchecked += (_, _) => value.IsEnabled = true;

        return new ParameterEditorRow(parameter, grid, useDefault, value);
    }

    private async Task ShowWebServerSettingsAsync()
    {
        ComboBox interfaces = new() { MinWidth = 260 };
        foreach (string address in GetLocalIPv4Addresses())
            interfaces.Items.Add(address);
        interfaces.Items.Add("0.0.0.0");
        interfaces.SelectedItem = interfaces.Items.Contains(ViewModel.ListenerIp) ? ViewModel.ListenerIp : "0.0.0.0";

        TextBox port = new()
        {
            Header = "Port",
            Text = ViewModel.ListenerPort.ToString(CultureInfo.InvariantCulture),
            InputScope = new InputScope { Names = { new InputScopeName(InputScopeNameValue.Number) } }
        };

        HyperlinkButton link = new()
        {
            Content = ViewModel.WebServerUrl,
            NavigateUri = new Uri(ViewModel.WebServerUrl)
        };

        StackPanel content = new() { Spacing = 12 };
        content.Children.Add(new TextBlock { Text = "Interface", FontWeight = new global::Windows.UI.Text.FontWeight { Weight = 600 } });
        content.Children.Add(interfaces);
        content.Children.Add(port);
        content.Children.Add(link);

        ContentDialog dialog = new()
        {
            XamlRoot = Content.XamlRoot,
            Title = "Remote Web Server",
            Content = content,
            PrimaryButtonText = "Save",
            CloseButtonText = "Cancel",
            DefaultButton = ContentDialogButton.Primary
        };

        dialog.PrimaryButtonClick += (_, args) =>
        {
            if (!int.TryParse(port.Text, NumberStyles.Integer, CultureInfo.InvariantCulture, out int parsedPort) || parsedPort < 1 || parsedPort > 65535)
            {
                port.Header = "Port must be 1-65535";
                args.Cancel = true;
                return;
            }

            ViewModel.ListenerIp = interfaces.SelectedItem as string ?? "0.0.0.0";
            ViewModel.ListenerPort = parsedPort;
        };

        await dialog.ShowAsync();
    }

    private async Task ShowWebServerAuthenticationAsync()
    {
        CheckBox enabled = new() { Content = "Enable HTTP authentication", IsChecked = ViewModel.AuthWebServer };
        TextBox userName = new()
        {
            Header = "Username",
            Text = ViewModel.AuthWebServerUserName,
            IsEnabled = enabled.IsChecked == true
        };
        PasswordBox password = new()
        {
            Header = "New password",
            IsEnabled = enabled.IsChecked == true
        };

        enabled.Checked += (_, _) => userName.IsEnabled = password.IsEnabled = true;
        enabled.Unchecked += (_, _) => userName.IsEnabled = password.IsEnabled = false;

        StackPanel content = new() { Spacing = 12 };
        content.Children.Add(enabled);
        content.Children.Add(userName);
        content.Children.Add(password);

        ContentDialog dialog = new()
        {
            XamlRoot = Content.XamlRoot,
            Title = "Remote Web Server Authentication",
            Content = content,
            PrimaryButtonText = "Save",
            CloseButtonText = "Cancel",
            DefaultButton = ContentDialogButton.Primary
        };
        dialog.PrimaryButtonClick += (_, _) =>
        {
            ViewModel.AuthWebServer = enabled.IsChecked == true;
            ViewModel.AuthWebServerUserName = userName.Text;
            ViewModel.SetAuthPassword(password.Password);
        };

        await dialog.ShowAsync();
    }

    private void SensorTree_SelectionChanged(TreeView sender, TreeViewSelectionChangedEventArgs args)
    {
        if (args.AddedItems.Count == 0)
        {
            ViewModel.SelectedItem = null;
            return;
        }

        object selected = args.AddedItems[0];
        if (selected is TreeViewNode node && node.Content is FrameworkElement element)
            ViewModel.SelectedItem = element.DataContext as SensorTreeItemViewModel;
    }

    private async Task SaveReportAsync()
    {
        FileSavePicker picker = new()
        {
            SuggestedFileName = "LibreHardwareMonitor.Report",
            SuggestedStartLocation = PickerLocationId.DocumentsLibrary
        };
        picker.FileTypeChoices.Add("Text", [".txt"]);
        InitializeWithWindow.Initialize(picker, WindowNative.GetWindowHandle(this));

        StorageFile? file = await picker.PickSaveFileAsync();
        if (file == null)
            return;

        CachedFileManager.DeferUpdates(file);
        await FileIO.WriteTextAsync(file, ViewModel.GetReport());
        await CachedFileManager.CompleteUpdatesAsync(file);
    }

    private async Task ShowAboutAsync()
    {
        StackPanel content = new() { Spacing = 8 };
        content.Children.Add(new TextBlock
        {
            Text = "Libre Hardware Monitor",
            FontWeight = new global::Windows.UI.Text.FontWeight { Weight = 600 },
            FontSize = 18
        });
        content.Children.Add(new TextBlock
        {
            Text = $"Version {typeof(MainWindow).Assembly.GetName().Version}",
            TextWrapping = TextWrapping.Wrap
        });
        content.Children.Add(new TextBlock
        {
            Text = "A free, open source hardware monitoring application.",
            TextWrapping = TextWrapping.Wrap
        });
        content.Children.Add(new HyperlinkButton
        {
            Content = "Project website",
            NavigateUri = new Uri("https://github.com/LibreHardwareMonitor/LibreHardwareMonitor")
        });
        content.Children.Add(new HyperlinkButton
        {
            Content = "Mozilla Public License 2.0",
            NavigateUri = new Uri("https://www.mozilla.org/MPL/2.0/")
        });

        ContentDialog dialog = new()
        {
            XamlRoot = Content.XamlRoot,
            Title = "Libre Hardware Monitor",
            Content = content,
            CloseButtonText = "OK"
        };
        await dialog.ShowAsync();
    }

    private void ResetPlot()
    {
        ViewModel.ResetPlot();
        DrawPlot();
    }

    private void DrawPlot()
    {
        if (_plotCanvas == null)
            return;

        _plotCanvas.Children.Clear();
        if (!ViewModel.ShowPlot || ViewModel.PlotSeries.Count == 0 || _plotCanvas.ActualWidth <= 4 || _plotCanvas.ActualHeight <= 4)
            return;

        double minTime = double.MaxValue;
        double maxTime = double.MinValue;
        double minValue = double.MaxValue;
        double maxValue = double.MinValue;

        foreach (PlotSeriesViewModel plotSeries in ViewModel.PlotSeries)
        {
            foreach (PlotPointViewModel point in plotSeries.Points)
            {
                double time = point.Timestamp.ToOADate();
                minTime = Math.Min(minTime, time);
                maxTime = Math.Max(maxTime, time);
                minValue = Math.Min(minValue, point.Value);
                maxValue = Math.Max(maxValue, point.Value);
            }
        }

        if (minTime == double.MaxValue || minValue == double.MaxValue)
            return;

        if (Math.Abs(maxTime - minTime) < double.Epsilon)
            maxTime = minTime + TimeSpan.FromSeconds(1).TotalDays;
        if (Math.Abs(maxValue - minValue) < double.Epsilon)
        {
            maxValue += 1;
            minValue -= 1;
        }

        double width = _plotCanvas.ActualWidth;
        double height = _plotCanvas.ActualHeight;
        DrawAxis(width, height);

        foreach (PlotSeriesViewModel plotSeries in ViewModel.PlotSeries)
        {
            Polyline line = new()
            {
                Stroke = new SolidColorBrush(plotSeries.Color),
                StrokeThickness = ViewModel.PlotStrokeThickness,
                StrokeLineJoin = PenLineJoin.Round
            };

            foreach (PlotPointViewModel point in plotSeries.Points)
            {
                double x = (point.Timestamp.ToOADate() - minTime) / (maxTime - minTime) * width;
                double y = height - ((point.Value - minValue) / (maxValue - minValue) * height);
                line.Points.Add(new global::Windows.Foundation.Point(x, y));
            }

            _plotCanvas.Children.Add(line);
        }
    }

    private void DrawAxis(double width, double height)
    {
        SolidColorBrush brush = new(Colors.Gray);
        for (int i = 1; i < 4; i++)
        {
            double y = height * i / 4;
            _plotCanvas.Children.Add(new Line
            {
                X1 = 0,
                X2 = width,
                Y1 = y,
                Y2 = y,
                Stroke = brush,
                StrokeThickness = 0.5,
                Opacity = 0.5
            });
        }
    }

    private void UpdatePlotLayout()
    {
        _contentGrid.ColumnDefinitions[1].Width = ViewModel.ShowPlot && ViewModel.PlotLocation == PlotLocation.Right ? new GridLength(320) : new GridLength(0);
        _contentGrid.RowDefinitions[1].Height = ViewModel.ShowPlot && ViewModel.PlotLocation == PlotLocation.Bottom ? new GridLength(220) : new GridLength(0);

        _plotPane.Visibility = ViewModel.ShowPlot ? Visibility.Visible : Visibility.Collapsed;
        Grid.SetRow(_plotPane, ViewModel.PlotGridRow);
        Grid.SetColumn(_plotPane, ViewModel.PlotGridColumn);
        Grid.SetRowSpan(_plotPane, ViewModel.PlotGridRowSpan);
        Grid.SetColumnSpan(_plotPane, ViewModel.PlotGridColumnSpan);
        Grid.SetRowSpan(_sensorPane, ViewModel.SensorGridRowSpan);
        Grid.SetColumnSpan(_sensorPane, ViewModel.SensorGridColumnSpan);
        DrawPlot();
    }

    private void ApplyTheme()
    {
        _rootGrid.RequestedTheme = ViewModel.ThemeMode switch
        {
            AppThemeMode.Light => ElementTheme.Light,
            AppThemeMode.Dark or AppThemeMode.Black => ElementTheme.Dark,
            _ => ElementTheme.Default
        };

        _rootGrid.Background = ViewModel.ThemeMode switch
        {
            AppThemeMode.Black => new SolidColorBrush(Colors.Black),
            AppThemeMode.Dark => new SolidColorBrush(global::Windows.UI.Color.FromArgb(255, 30, 30, 30)),
            _ => (Brush)Application.Current.Resources["ApplicationPageBackgroundThemeBrush"]
        };
    }

    private void RestoreWindowBounds()
    {
        int width = Math.Max(470, ViewModel.Settings.GetValue("mainForm.Width", 760));
        int height = Math.Max(640, ViewModel.Settings.GetValue("mainForm.Height", 680));
        _appWindow.Resize(new SizeInt32(width, height));

        int x = ViewModel.Settings.GetValue("mainForm.Location.X", int.MinValue);
        int y = ViewModel.Settings.GetValue("mainForm.Location.Y", int.MinValue);
        if (x != int.MinValue && y != int.MinValue)
            _appWindow.Move(new PointInt32(x, y));
    }

    private void MaximizeWindow()
    {
        if (_appWindow.Presenter is OverlappedPresenter presenter)
            presenter.Maximize();
    }

    private void SaveWindowBounds()
    {
        ViewModel.Settings.SetValue("mainForm.Location.X", _appWindow.Position.X);
        ViewModel.Settings.SetValue("mainForm.Location.Y", _appWindow.Position.Y);
        ViewModel.Settings.SetValue("mainForm.Width", _appWindow.Size.Width);
        ViewModel.Settings.SetValue("mainForm.Height", _appWindow.Size.Height);
        ViewModel.Save();
    }

    private void UpdateSensorColumnWidths()
    {
        double sensorWidth = MeasureText("Sensor", true) + SensorColumnPadding;
        double valueWidth = ViewModel.ShowValueColumn ? MeasureText("Value", true) + ValueColumnPadding : 0;
        double minWidth = ViewModel.ShowMinColumn ? MeasureText("Min", true) + ValueColumnPadding : 0;
        double maxWidth = ViewModel.ShowMaxColumn ? MeasureText("Max", true) + ValueColumnPadding : 0;

        foreach (SensorTreeItemViewModel root in ViewModel.RootItems)
            MeasureSensorColumnWidths(root, 0, ref sensorWidth, ref valueWidth, ref minWidth, ref maxWidth);

        _sensorColumnWidths[0] = Math.Ceiling(sensorWidth);
        _sensorColumnWidths[1] = Math.Ceiling(valueWidth);
        _sensorColumnWidths[2] = Math.Ceiling(minWidth);
        _sensorColumnWidths[3] = Math.Ceiling(maxWidth);

        if (_sensorHeader != null)
            ApplySensorColumnWidths(_sensorHeader);
        foreach (Grid row in _sensorRowGrids)
            ApplySensorColumnWidths(row);
    }

    private void MeasureSensorColumnWidths(
        SensorTreeItemViewModel item,
        int depth,
        ref double sensorWidth,
        ref double valueWidth,
        ref double minWidth,
        ref double maxWidth)
    {
        if (item.RowVisibility == Visibility.Visible)
        {
            sensorWidth = Math.Max(sensorWidth, MeasureText(item.Text) + SensorColumnPadding + depth * SensorTreeIndentWidth);
            if (ViewModel.ShowValueColumn)
                valueWidth = Math.Max(valueWidth, MeasureText(item.Value) + ValueColumnPadding);
            if (ViewModel.ShowMinColumn)
                minWidth = Math.Max(minWidth, MeasureText(item.Min) + ValueColumnPadding);
            if (ViewModel.ShowMaxColumn)
                maxWidth = Math.Max(maxWidth, MeasureText(item.Max) + ValueColumnPadding);
        }

        foreach (SensorTreeItemViewModel child in item.Children)
            MeasureSensorColumnWidths(child, depth + 1, ref sensorWidth, ref valueWidth, ref minWidth, ref maxWidth);
    }

    private static double MeasureText(string text, bool bold = false)
    {
        TextBlock textBlock = new()
        {
            Text = text,
            FontWeight = new global::Windows.UI.Text.FontWeight { Weight = bold ? (ushort)600 : (ushort)400 }
        };
        textBlock.Measure(new global::Windows.Foundation.Size(double.PositiveInfinity, double.PositiveInfinity));
        return textBlock.DesiredSize.Width;
    }

    private void ApplySensorColumnWidths(Grid grid)
    {
        for (int i = 0; i < grid.ColumnDefinitions.Count && i < _sensorColumnWidths.Length; i++)
            grid.ColumnDefinitions[i].Width = new GridLength(_sensorColumnWidths[i]);
    }

    private Grid CreateSensorRowGrid()
    {
        Grid grid = new()
        {
            ColumnDefinitions =
            {
                new ColumnDefinition(),
                new ColumnDefinition(),
                new ColumnDefinition(),
                new ColumnDefinition()
            }
        };

        ApplySensorColumnWidths(grid);
        return grid;
    }

    private TextBlock CreateHeaderText(string text, int column, Visibility visibility, string? bindingPath = null)
    {
        TextBlock textBlock = new()
        {
            Text = text,
            FontWeight = new global::Windows.UI.Text.FontWeight { Weight = 600 },
            Visibility = visibility
        };
        if (bindingPath != null)
            Bind(textBlock, UIElement.VisibilityProperty, ViewModel, bindingPath);
        Grid.SetColumn(textBlock, column);
        return textBlock;
    }

    private static TextBlock CreateValueTextBlock(SensorTreeItemViewModel item, string textPath, string visibilityPath, int column)
    {
        TextBlock textBlock = new() { TextTrimming = TextTrimming.CharacterEllipsis };
        Bind(textBlock, TextBlock.TextProperty, item, textPath);
        Bind(textBlock, UIElement.VisibilityProperty, item, visibilityPath);
        Grid.SetColumn(textBlock, column);
        return textBlock;
    }

    private static MenuFlyoutSubItem BuildIndexedSubMenu(string text, (string Label, int Value)[] items, Func<int> getter, Action<int> setter)
    {
        return BuildRadioSubMenu(text, items, getter, setter);
    }

    private static MenuFlyoutSubItem BuildRadioSubMenu<T>(string text, (string Label, T Value)[] items, Func<T> getter, Action<T> setter)
    {
        MenuFlyoutSubItem subItem = new() { Text = text };
        foreach ((string label, T value) in items)
        {
            ToggleMenuFlyoutItem item = new()
            {
                Text = label,
                IsChecked = Equals(getter(), value)
            };
            item.Click += (_, _) =>
            {
                setter(value);
                foreach (ToggleMenuFlyoutItem sibling in subItem.Items.OfType<ToggleMenuFlyoutItem>())
                    sibling.IsChecked = Equals(sibling.Tag, value);
            };
            item.Tag = value;
            subItem.Items.Add(item);
        }

        return subItem;
    }

    private static MenuFlyoutItem CreateMenuItem(string text, RoutedEventHandler handler)
    {
        MenuFlyoutItem item = new() { Text = text };
        item.Click += handler;
        return item;
    }

    private ToggleMenuFlyoutItem CreateToggleItem(string text, string bindingPath)
    {
        ToggleMenuFlyoutItem item = new() { Text = text };
        Bind(item, ToggleMenuFlyoutItem.IsCheckedProperty, ViewModel, bindingPath, BindingMode.TwoWay);
        return item;
    }

    private static string[] GetLocalIPv4Addresses()
    {
        try
        {
            return Dns.GetHostEntry(Dns.GetHostName())
                .AddressList
                .Where(address => address.AddressFamily == AddressFamily.InterNetwork)
                .Select(address => address.ToString())
                .Distinct(StringComparer.OrdinalIgnoreCase)
                .ToArray();
        }
        catch
        {
            return [];
        }
    }

    private sealed record ParameterEditorRow(IParameter Parameter, Grid Container, CheckBox UseDefault, TextBox Value);

    private static void Bind(DependencyObject target, DependencyProperty property, object source, string path, BindingMode mode = BindingMode.OneWay)
    {
        BindingOperations.SetBinding(target, property, new Binding
        {
            Source = source,
            Path = new PropertyPath(path),
            Mode = mode,
            UpdateSourceTrigger = UpdateSourceTrigger.PropertyChanged
        });
    }
}