using System;
using System.ComponentModel;
using System.Globalization;
using System.Reflection;
using System.Windows.Data;

namespace TodoList.Converters
{
    public class EnumDescriptionConverter : IValueConverter
    {
        public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
        {
            if (value == null) return string.Empty;

            var type = value.GetType();
            var name = Enum.GetName(type, value);
            if (name == null) return value.ToString();

            var field = type.GetField(name);
            if (field == null) return value.ToString();

            var attr = Attribute.GetCustomAttribute(field, typeof(DescriptionAttribute)) as DescriptionAttribute;
            return attr?.Description ?? value.ToString();
        }

        public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
        {
            return value;
        }
    }
}