using System.Globalization;
using Avalonia;
using Avalonia.Data.Converters;
using Avalonia.Media;

namespace ClaudeDo.Ui.Converters;

/// <summary>
/// Converts an icon key string (e.g. "Sun") to the matching StreamGeometry resource "Icon.Sun".
/// </summary>
public class IconKeyConverter : IValueConverter
{
    public static IconKeyConverter Instance { get; } = new();

    public object? Convert(object? value, Type targetType, object? parameter, CultureInfo culture)
    {
        if (value is not string key || string.IsNullOrEmpty(key))
            return null;

        var resourceKey = $"Icon.{key}";
        if (Application.Current?.TryGetResource(resourceKey, null, out var res) == true)
            return res as StreamGeometry;
        return null;
    }

    public object ConvertBack(object? value, Type targetType, object? parameter, CultureInfo culture)
        => throw new NotSupportedException();
}