using System;
using System.Globalization;
using System.Windows.Data;
using System.Windows.Media;

namespace ytLive.Helpers;

/// <summary>Turns a "#RRGGBB" hex string into a brush, so a template can paint a colour
/// swatch straight from the palette (TASK 63).
///
/// <para>Without it the UI would have to hand-build a brush in code — the hand-painted
/// approach the theme forbids. A colour is data; the theme paints it.</para></summary>
public class HexToBrushConverter : IValueConverter
{
    public object? Convert(object? value, Type targetType, object? parameter, CultureInfo culture)
    {
        if (value is not string hex || string.IsNullOrWhiteSpace(hex))
            return Brushes.Transparent;
        try
        {
            var colour = (Color)ColorConverter.ConvertFromString(hex.Trim());
            return new SolidColorBrush(colour);
        }
        catch (FormatException)
        {
            return Brushes.Transparent;
        }
    }

    public object ConvertBack(object? value, Type targetType, object? parameter, CultureInfo culture)
        => throw new NotSupportedException("A brush is not a hex value.");
}