using System;
using System.Collections;
using System.Diagnostics;
using System.Text;
using System.Collections.Generic;
using System.Reflection;
using System.Reflection.Emit;
using System.IO;
using System.Runtime.Serialization;
using System.ComponentModel;
using Sleis.Infrastructure;
using Sleis.Models;

namespace Sleis.Utility
{
    public static class RoleUtility<T>
    {
		//public static int RoleSort(AppUserRoleType role1, AppUserRoleType role2) {
					
		//}

		//    public int MySortFunction(MyObject obj1, MyObject obj2)
		//    {
		//      return obj2.CompareTo(obj1);
		//    }

        public static string ToDescriptionString(List<T> Roles)
        {
            List<string> list = new List<string>();
            foreach (T key in Roles)
            {
                List<string> descs = new List<string>();
                string desc = ToDescription(key);
                list.Add(desc);
            }
            return String.Join(", ", list.ToArray());
        }

        public static string ToDescription(T enumValue)
        {
            if (!enumValue.GetType().IsEnum)
            {
                throw new ArgumentException("enumValue must be an enum");
            }

            if (!typeof(T).IsEnum)
            {
                throw new InvalidOperationException("T must be an enum");
            }

            DescriptionAttribute[] da = (DescriptionAttribute[])
                (typeof(T).GetField(enumValue.ToString()).GetCustomAttributes(typeof(DescriptionAttribute), false));

            return ((da.Length > 0) ? da[0].Description : enumValue.ToString());
        }
       
    }
}