/**
    *
    * @date 2014-10-22        
    *
    * @author 邓尹平
    *
    * @par 成员列表类 说明
    * 主要负责管理成员 提供搜索\排序和操作的方法
    * 
    * @par 版权声明
    * 深圳市多元世纪信息技术有限公司 版权所有
    * 
    * @see 使用此类时参照一些其他类可以写在这里
    * 
    * @todo 该类有待完成的任务 一条条列出 完成一条删除一条
    *
    * @bug 该类已知的Bug一条条列出 完成一条删除一条
    *
*/

using Muchinfo.MTPClient.Data.Helper;
using Muchinfo.MTPClient.Resources;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Reflection;

namespace Muchinfo.MTPClient.Data.Extensions
{
    public static class EnumExtensions
    {
        private static Dictionary<Enum, string> dictDiscs = new Dictionary<Enum, string>();
        private static Dictionary<string, List<DropDataTemplate>> _EnumList = new Dictionary<string, List<DropDataTemplate>>(); //枚举缓存池

        /// <summary>
        /// 获取枚举描述
        /// </summary>
        /// <param name="en">The en.</param>
        /// <returns>System.String.</returns>
        public static string ToDescription(this Enum en)
        {
            try
            {
                Type type = en.GetType();
                MemberInfo[] memInfo = type.GetMember(en.ToString());
                if (memInfo.Length > 0)
                {
                    object[] attrs = memInfo[0].GetCustomAttributes(typeof(ItemDiscAttribute), false);
                    if (attrs.Length > 0)
                        return ((ItemDiscAttribute)attrs[0]).Description;
                }
                return en.ToString();
            }
            catch
            {
                return string.Empty;
            }
        }


        /// <summary>
        /// 获取枚举说明，
        /// Sim=》TradeDirection.Register.Discription();
        /// </summary>
        /// <param name="myEnum"></param>
        /// <returns></returns>
        public static string Discription1(this Enum myEnum)
        {
            string strDisc = string.Empty;
            if (dictDiscs.ContainsKey(myEnum))
            {
                strDisc = dictDiscs[myEnum];
            }
            else
            {
                strDisc = GetDiscription(myEnum);
                dictDiscs.Add(myEnum, strDisc);
            }
            return strDisc;
        }

        private static string GetDiscription(Enum myEnum)
        {
            FieldInfo fieldInfo = myEnum.GetType().GetField(myEnum.ToString());
            if (fieldInfo == null)
            {
                return myEnum.ToString();
            }

            object[] attrs = fieldInfo.GetCustomAttributes(typeof(ItemDiscAttribute), true);
            if (attrs != null && attrs.Length > 0)
            {
                ItemDiscAttribute desc = attrs[0] as ItemDiscAttribute;
                if (desc != null)
                {
                    string temp = Client_Resource.ResourceManager.GetString(desc.Description, Client_Resource.Culture);
                    return temp;
                }
            }
            return myEnum.ToString();
        }

        /// <summary>
        /// 枚举转换成字典Key-枚举值, Value-枚举描述
        /// </summary>
        /// <typeparam name="TEnum">The type of the t enum.</typeparam>
        /// <returns>Dictionary{``0System.String}.</returns>
        public static Dictionary<TEnum, string> ToDictionary<TEnum>() where TEnum : struct
        {
            try
            {
                var result = new Dictionary<TEnum, string>();

                foreach (var item in Enum.GetValues(typeof(TEnum)))
                {
                    var enumItem = (Enum)item;
                    result.Add((TEnum)item, enumItem.Discription());
                }
                return result.OrderBy(z => z.Key).ToDictionary(z => z.Key, z => z.Value);
            }
            catch
            {
                return null;
            }
        }
    }
}