Sheas-Cealer/Preses/GlobalPres.cs

using System.Diagnostics;
using System.Windows;
using CommunityToolkit.Mvvm.ComponentModel;
using MaterialDesignThemes.Wpf;
using Sheas_Cealer.Props;
using Sheas_Cealer.Utils;

namespace Sheas_Cealer.Preses;

internal partial class GlobalPres : ObservableObject
{
    internal GlobalPres()
    {
        IsLightTheme = Settings.Default.IsLightTheme switch
        {
            -1 => null,
            0 => false,
            1 => true,
            _ => throw new UnreachableException()
        };
    }

    [ObservableProperty]
    private static bool? isLightTheme = null;
    partial void OnIsLightThemeChanged(bool? value)
    {
        PaletteHelper paletteHelper = new();
        Theme newTheme = paletteHelper.GetTheme();

        newTheme.SetBaseTheme(value.HasValue ? value.Value ? BaseTheme.Light : BaseTheme.Dark : BaseTheme.Inherit);
        paletteHelper.SetTheme(newTheme);

        foreach (Window currentWindow in Application.Current.Windows)
            BorderThemeSetter.SetBorderTheme(currentWindow, value);

        Settings.Default.IsLightTheme = (sbyte)(value.HasValue ? value.Value ? 1 : 0 : -1);
        Settings.Default.Save();
    }
}