using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Linq;
using System.Reflection;
using System.Text;
using System.Threading.Tasks;

namespace GTech.Solution.Api.Common
{
    public class EnumUtil
    {
        public static TEnum Parse<TEnum>(int? value)
        {
            try
            {
                Type enumType = typeof(TEnum);
                return (TEnum)Enum.Parse(enumType, value.ToString());
            }
            catch (Exception)
            {
                throw;
            }
        }

        public static TEnum Parse<TEnum>(string str)
        {
            try
            {
                TEnum result = (TEnum)Enum.Parse(typeof(TEnum), str);

                return result;
            }
            catch (Exception)
            {
                throw;
            }
        }

        public static string GetDescription<T>(int? value)
        {
            var enumerationValue = Parse<T>(value);
            if (enumerationValue == null)
                return string.Empty;

            Type type = enumerationValue.GetType();
            MemberInfo[] memberInfo = type.GetMember(enumerationValue.ToString());

            object[] attrs = memberInfo[0].GetCustomAttributes(typeof(DescriptionAttribute), false);
            if (attrs != null && attrs.Length > 0)
            {
                return ((DescriptionAttribute)attrs[0]).Description;
            }
            else
            {
                return enumerationValue.ToString();
            }
        }

        public static TDescriptionType GetDescription<TDescriptionType>(Enum enumerationValue)
        {
            Type type = enumerationValue.GetType();
            MemberInfo[] memberInfo = type.GetMember(enumerationValue.ToString());

            object[] attrs = memberInfo[0].GetCustomAttributes(typeof(DescriptionAttribute), false);
            if (attrs != null && attrs.Length > 0)
            {
                var result = ((DescriptionAttribute)attrs[0]).Description;
                return (TDescriptionType)Convert.ChangeType(result, typeof(TDescriptionType));
            }
            else
            {
                return (TDescriptionType)Convert.ChangeType(enumerationValue, typeof(TDescriptionType));
            }
        }

        public static string GetEnumString<TEnum>(int? value)
        {
            if (!value.HasValue)
                return string.Empty;

            Type enumType = typeof(TEnum);
            return Enum.Parse(enumType, value.ToString()).ToString();
        }
    }
}