//----------------------------------------------------------------
//Module Name:  EnumHelper
//Purpose:      
//CopyRight:    Muchinfo
//History:
//----------------------------------------------------------------
//DateTime		2015/1/9 9:48:18
//Author        ouyang.hongbin
//Description   Create
//----------------------------------------------------------------
using Muchinfo.MTPClient.Resources;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Reflection;

namespace Muchinfo.MTPClient.Data.Helper
{
    /// <summary>
    /// DropDataTemplate,Enum转List Model
    /// </summary>
    public class DropDataTemplate
    {
        private int _Index;
        /// <summary>
        /// 排序
        /// </summary>
        public int Index
        {
            get { return _Index; }
            set { _Index = value; }
        }


        private string _Description;
        /// <summary>
        /// 说明
        /// </summary>
        public string Description
        {
            get { return _Description; }
            set { _Description = value; }
        }

        private int _Value;
        /// <summary>
        /// 值
        /// </summary>
        public int Value
        {
            get { return _Value; }
            set { _Value = value; }
        }

        private string _GroupKey;
        /// <summary>
        /// 分组关键字
        /// </summary>
        public string GroupKey
        {
            get { return _GroupKey; }
            set { _GroupKey = value; }
        }


        private object _Tag;
        /// <summary>
        /// 原先目标
        /// </summary>
        public object Tag
        {
            get { return _Tag; }
            set { _Tag = value; }
        }
    }
    [AttributeUsage(AttributeTargets.Field)]
    public class KindDiscAttribute : Attribute
    {
        private string _Description;
        /// <summary>
        /// Description
        /// </summary>
        public string Description
        {
            get { return _Description; }
            set { _Description = value; }
        }

        private int _Kind;
        /// <summary>
        /// kind
        /// </summary>
        public int Kind
        {
            get { return _Kind; }
            set
            {
                _Kind = Kind;
            }
        }

        /// <summary>
        /// ItemDiscAttribute,kind所属分类
        /// </summary>
        /// <param name="description">说明</param>
        /// <param name="kind">所属分类</param>
        public KindDiscAttribute(string description, int kind)
        {
            _Description = description;
            _Kind = kind;
        }


        /// <summary>
        /// ItemDiscAttribute
        /// </summary>
        /// <param name="Description"></param>
        public KindDiscAttribute(string description)
        {
            _Description = description;
        }
    }

    [AttributeUsage(AttributeTargets.Field)]
    public class ItemDiscAttribute : Attribute
    {
        private string _Description;
        /// <summary>
        /// Description
        /// </summary>
        public string Description
        {
            get { return _Description; }
            set { _Description = Description; }
        }

        private readonly string _Group;
        /// <summary>
        /// getGroup
        /// </summary>
        public string[] Group
        {
            get { return _Group.Split(','); }
        }

        /// <summary>
        /// ItemDiscAttribute,带分组的
        /// </summary>
        /// <param name="description">说明</param>
        /// <param name="Group">分组，如一个Enum同时具有多个分组，请用“，”号隔开</param>
        public ItemDiscAttribute(string description, string group)
        {
            _Description = description;
            _Group = group;
        }

        /// <summary>
        /// ItemDiscAttribute
        /// </summary>
        /// <param name="Description"></param>
        public ItemDiscAttribute(string Description)
        {
            _Description = Description;
        }
    }

    /// <summary>
    /// EnumHelper,枚举工具类
    /// </summary>
    public static class EnumHelper
    {

        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>
        /// 获取枚举说明，
        /// Sim=》TradeDirection.Register.Discription();
        /// </summary>
        /// <param name="myEnum">My enum.</param>
        /// <param name="enumCode">数据库枚举实际定义的代码</param>
        /// <returns>System.String.</returns>
        public static string Discription(this Enum myEnum, string enumCode="")
        {
            string strDisc = string.Empty;
            //if (dictDiscs.ContainsKey(myEnum))
            //{
            //    strDisc = dictDiscs[myEnum];
            //}
            //else
            //{
            strDisc = GetDiscription(myEnum, enumCode);
            //  dictDiscs.Add(myEnum, strDisc);
            // }
            return strDisc;
        }

        /// <summary>
        /// Gets the discription.
        /// </summary>
        /// <param name="myEnum">My enum.</param>
        /// <param name="enumCode">数据库枚举实际定义的代码</param>
        /// <returns>System.String.</returns>
        private static string GetDiscription(Enum myEnum, string enumCode = "")
        {
            var enumType = myEnum.GetType();
            var val = (int)Enum.Parse(enumType, myEnum.ToString());

            //枚举代码不为空，则根据枚举代码+值从常量缓存获取, 否则根据枚举名称+值从常量数据取
            var resxKey = string.Format("{0}_{1}", string.IsNullOrWhiteSpace(enumCode) ? enumType.Name: enumCode, val);
            if (ConstResxManager.ConstResx != null &&
                ConstResxManager.ConstResx.ResourceHashtable != null &&
                ConstResxManager.ConstResx.ResourceHashtable.ContainsKey(resxKey))
            {
                return ConstResxManager.ConstResx.ResourceHashtable[resxKey] as string;
            }

            

            FieldInfo fieldInfo = enumType.GetField(myEnum.ToString());
            if (fieldInfo == null)
            {
                return myEnum.ToString();
            }

            //获取字典的ItemDisc属性
            object[] attrs = fieldInfo.GetCustomAttributes(typeof(ItemDiscAttribute), true);
            ItemDiscAttribute desc = null;
            if (attrs != null && attrs.Length > 0)
            {
                desc = attrs[0] as ItemDiscAttribute;
            }
            //若ItemDisc为空，则根据枚举的字符从资源里查找对应描述
            string temp = Client_Resource.ResourceManager.GetString(desc == null ? myEnum.ToString() : desc.Description, Client_Resource.Culture);

            if (!string.IsNullOrWhiteSpace(temp)) return temp;
            return myEnum.ToString();
        }

        /// <summary>
        ///显示 枚举内容
        /// </summary>
        /// <typeparam name="T">属性类型</typeparam>
        /// <param name="myEnum"></param>
        /// <returns></returns>
        public static string Discription<T>(this Enum myEnum)
        {
            FieldInfo fieldInfo = myEnum.GetType().GetField(myEnum.ToString());
            object[] attrs = fieldInfo.GetCustomAttributes(typeof(T), true);
            if (attrs != null && attrs.Length > 0)
            {
                var attributesType = attrs[0].GetType();
                var property = attributesType.GetProperty("Description");
                return (string)property.GetValue(attrs[0], null);
            }
            return myEnum.ToString();
        }

        public static int GetKind(Enum myEnum)
        {
            FieldInfo fieldInfo = myEnum.GetType().GetField(myEnum.ToString());
            if (fieldInfo != null)
            {
                object[] attrs = fieldInfo.GetCustomAttributes(typeof(KindDiscAttribute), true);
                if (attrs != null && attrs.Length > 0)
                {
                    KindDiscAttribute kind = attrs[0] as KindDiscAttribute;
                    if (kind != null)
                    {
                        return kind.Kind;
                    }
                }
            }
            return 0;

        }

        /// <summary>
        /// 将枚举转换成 List DropDataTemplate
        /// </summary>
        /// <param name="enumType">枚举类型</param>
        /// <returns></returns>
        public static List<DropDataTemplate> EnumToDictionary(Type enumType)
        {
            string keyName = enumType.FullName;
            if (!_EnumList.ContainsKey(keyName))
            {
                var list = new List<DropDataTemplate>();
                int index = 0;
                foreach (int i in Enum.GetValues(enumType))
                {
                    string name = Enum.GetName(enumType, i);
                    //取显示名称
                    string description = string.Empty;
                    object[] atts = enumType.GetField(name).GetCustomAttributes(typeof(ItemDiscAttribute), false);
                    if (atts.Length > 0)
                    {

                        description = ((ItemDiscAttribute)atts[0]).Description;
                    }
                    list.Add(new DropDataTemplate()
                    {
                        Index = index++,
                        Value = i,
                        Description = string.IsNullOrEmpty(description) ? name : description,
                        Tag = Enum.Parse(enumType, name),
                    });
                }
                object syncObj = new object();
                if (!_EnumList.ContainsKey(keyName))
                {
                    lock (syncObj)
                    {
                        if (!_EnumList.ContainsKey(keyName))
                        {
                            _EnumList.Add(keyName, list);
                        }
                    }
                }
            }
            return _EnumList[keyName];
        }


        /// <summary>
        /// 将枚举转换成 List DropDataTemplate
        /// </summary>
        /// <param name="enumType">枚举类型</param>
        /// <param name="groupName">分组名称</param>
        /// <returns></returns>
        public static List<DropDataTemplate> EnumToDictionary(Type enumType, string groupName)
        {
            string keyName = enumType.FullName;
            if (!_EnumList.ContainsKey(keyName))
            {
                var list = new List<DropDataTemplate>();
                int index = 0;
                foreach (int i in Enum.GetValues(enumType))
                {
                    string name = Enum.GetName(enumType, i);
                    //取显示名称
                    string description = string.Empty;
                    string group = string.Empty;
                    object[] atts = enumType.GetField(name).GetCustomAttributes(typeof(ItemDiscAttribute), false);
                    if (!string.IsNullOrWhiteSpace(groupName) && ((ItemDiscAttribute)atts[0]).Group.Where(x => x == groupName).Count() > 0)
                    {
                        if (atts.Length > 0)
                        {
                            description = ((ItemDiscAttribute)atts[0]).Description;
                        }
                        list.Add(new DropDataTemplate()
                        {
                            Index = index++,
                            Value = i,
                            GroupKey = groupName,
                            Description = string.IsNullOrEmpty(description) ? name : description,
                            Tag = Enum.Parse(enumType, name),
                        });
                    }
                }
                object syncObj = new object();
                if (!_EnumList.ContainsKey(keyName))
                {
                    lock (syncObj)
                    {
                        if (!_EnumList.ContainsKey(keyName))
                        {
                            _EnumList.Add(keyName, list);
                        }
                    }
                }
            }
            return _EnumList[keyName];
        }



        /// <summary>
        /// 将枚举转换成 Dictionary<object,string>
        /// </summary>
        /// <param name="enumType">枚举类型</param>
        /// <returns></returns>
        public static Dictionary<object, string> ToDictionaryEnum(Type enumType)
        {
            string keyName = enumType.FullName;

            var list = new Dictionary<object, string>();
            // int index = 0;
            foreach (int i in Enum.GetValues(enumType))
            {
                string name = Enum.GetName(enumType, i);
                //取显示名称
                string description = string.Empty;

                object[] atts = enumType.GetField(name).GetCustomAttributes(typeof(ItemDiscAttribute), false);

                if (atts.Length > 0)
                {
                    description = ((ItemDiscAttribute)atts[0]).Description;
                }
                list[Enum.Parse(enumType, name)] = string.IsNullOrEmpty(description) ? name : description;
            }

            return list;
        }

        /// <summary>
        /// 获取枚举值对应的显示名称
        /// </summary>
        /// <param name="enumType">枚举类型</param>
        /// <param name="intValue">枚举项对应的int值</param>
        /// <returns></returns>
        public static
        string GetEnumShowName(Type enumType, int Index)
        {
            return EnumToDictionary(enumType)[Index].Description;
        }
    }
}