using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Linq;

namespace ENI2.Util
{
    public static class EnumHelper
    {
        public static string Description (this Enum eValue)
        {
            var nAttributes = eValue.GetType().GetField(eValue.ToString()).GetCustomAttributes(typeof(DescriptionAttribute), false);
            if (nAttributes.Any())
                return (nAttributes.First() as DescriptionAttribute).Description;
            return eValue.ToString();
        }

        public static IEnumerable<KeyValuePair<string, string>> GetAllValuesAndDescription(Type t)
        {
            if (!t.IsEnum)
                throw new ArgumentException("t must be an enum");
            return from e in Enum.GetValues(t).Cast<Enum>()
                   select new KeyValuePair<string, string>(e.ToString(), e.Description());
        }

    }
}