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

namespace Dominion.NET_WPF.Converters
{
	public class VcLayoutStyleToString : IValueConverter
	{
		public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
		{
			if (string.IsNullOrEmpty(value.ToString()))  // This is for databinding
				return LayoutStyle.Supply2Columns;
			return (StringToEnum<LayoutStyle>(value.ToString())).ToDescription(); // <-- The extention method
		}

		public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
		{
		    return string.IsNullOrEmpty(value.ToString()) ? LayoutStyle.Supply2Columns : StringToEnum<LayoutStyle>(value.ToString());
		}

		public static T StringToEnum<T>(string name)
		{
			return (T)Enum.Parse(typeof(T), name);
		}
	}

	public class EnumDescriptionConverter : IValueConverter
	{
		private static string GetEnumDescription(Enum enumObj)
		{
			var fieldInfo = enumObj.GetType().GetField(enumObj.ToString());

			var attribArray = fieldInfo.GetCustomAttributes(false);

			foreach (var attrib in attribArray)
			{
			    var attribute = attrib as DescriptionAttribute;
			    if (attribute != null)
					return attribute.Description;
			}
			return enumObj.ToString();
		}

		object IValueConverter.Convert(object value, Type targetType, object parameter, CultureInfo culture)
		{
			var myEnum = (Enum)value;
			var description = GetEnumDescription(myEnum);
			return description;
		}

		object IValueConverter.ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
		{
			return string.Empty;
		}
	}
}