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

namespace Avalonia.PropertyGrid.Controls;

/// <summary>
/// Converts an Avalonia.Media.Color to a SolidColorBrush
/// </summary>
public sealed class ColorToBrushConverter : IValueConverter
{
    /// <summary>
    /// Converts a Color to a SolidColorBrush.
    /// </summary>
    /// <param name="value">The Color value to convert.</param>
    /// <param name="targetType">The target type.</param>
    /// <param name="parameter">Optional parameter.</param>
    /// <param name="culture">Culture information.</param>
    /// <returns>A SolidColorBrush with the specified color.</returns>
    public object? Convert(object? value, Type targetType, object? parameter, CultureInfo culture)
    {
        if (value is Color color)
        {
            return new SolidColorBrush(color);
        }

        // Return transparent brush if not a color
        return new SolidColorBrush(Colors.Transparent);
    }

    /// <summary>
    /// Converts a SolidColorBrush back to a Color.
    /// </summary>
    /// <param name="value">The SolidColorBrush value to convert back.</param>
    /// <param name="targetType">The target type.</param>
    /// <param name="parameter">Optional parameter.</param>
    /// <param name="culture">Culture information.</param>
    /// <returns>The Color from the brush.</returns>
    public object? ConvertBack(object? value, Type targetType, object? parameter, CultureInfo culture)
    {
        if (value is SolidColorBrush brush)
        {
            return brush.Color;
        }

        return Colors.Transparent;
    }
}