using System.Globalization;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;

namespace RQOverlay;

/// <summary>bool -> Visibility. ConverterParameter="!" инвертирует.</summary>
public sealed class BoolToVis : IValueConverter
{
    public object Convert(object value, Type t, object? p, CultureInfo c)
    {
        bool v = value is true;
        if (p as string == "!") v = !v;
        return v ? Visibility.Visible : Visibility.Collapsed;
    }

    public object ConvertBack(object value, Type t, object? p, CultureInfo c) => throw new NotSupportedException();
}

/// <summary>
/// Панель-полоска: делит ширину между детьми пропорционально их весу
/// (присоединённое свойство Weight). Для полоски долей дохода.
/// </summary>
public sealed class ShareStrip : Panel
{
    public static readonly DependencyProperty WeightProperty = DependencyProperty.RegisterAttached(
        "Weight", typeof(double), typeof(ShareStrip),
        new FrameworkPropertyMetadata(0.0, FrameworkPropertyMetadataOptions.AffectsParentArrange));

    public static double GetWeight(DependencyObject o) => (double)o.GetValue(WeightProperty);
    public static void SetWeight(DependencyObject o, double v) => o.SetValue(WeightProperty, v);

    protected override Size MeasureOverride(Size available)
    {
        foreach (UIElement child in InternalChildren) child.Measure(available);
        return new Size(0, 0);   // растягиваемся на всё, что дадут
    }

    protected override Size ArrangeOverride(Size final)
    {
        double total = InternalChildren.Cast<UIElement>().Sum(c => Math.Max(0, GetWeight(c)));
        double x = 0;
        foreach (UIElement child in InternalChildren)
        {
            double w = total > 0 ? final.Width * Math.Max(0, GetWeight(child)) / total : 0;
            child.Arrange(new Rect(x, 0, w, final.Height));
            x += w;
        }
        return final;
    }
}