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

namespace BPASmartClient.MessageName.EnumHelp
{
    /// <summary>
    /// 枚举
    /// </summary>
    public static class EnumExtensions
    {
        public static int jishu = 0;
        /// <summary>
        /// 根据控件-》创建枚举类型
        /// </summary>
        /// <returns></returns>
        public static object CreatEnumType(UIElementCollection list)
        {
            var currentDomain = AppDomain.CurrentDomain;
            var assembly = Assembly.GetExecutingAssembly();
            var assemblyBuilder = AssemblyBuilder.DefineDynamicAssembly(assembly!.GetName(), AssemblyBuilderAccess.Run);
            var moduleBuilder = assemblyBuilder.DefineDynamicModule(assembly.GetName().Name!);
            var em = moduleBuilder.DefineEnum($"Control_{((Convert.ToInt32(jishu) + 1).ToString().PadLeft(4, '0'))}", TypeAttributes.Public, typeof(string));
            foreach (var item in list)
            {
                if (item is System.Windows.Controls.Control e)
                {
                    if (e.Tag != null)
                    {
                        em.DefineLiteral(e.Tag.ToString(), e.Tag.ToString());
                    }
                }
            }
            em.DefineLiteral("空", "空");
            Type finished = em.CreateType()!;
            return finished;
            //foreach (object o in Enum.GetValues(finished))
            //{
            //    Console.WriteLine($"{finished}.{o} = {(int)o};");
            //}
        }


        /// <summary>
        /// 动态创建枚举
        /// </summary>
        /// <param name="enumDictionary">枚举元素列表</param>
        /// <param name="enumName">枚举名</param>
        /// <returns>Enum枚举</returns>
        public static Enum CreateEnum(Dictionary<string,int> enumDictionary,string enumName = "DefalutEnum")
        {
            if (enumDictionary == null || enumDictionary.Count <= 0)
                return null;

            AppDomain currentDomain = AppDomain.CurrentDomain;
            AssemblyName aName = new AssemblyName("TempAssembly");
            AssemblyBuilder ab = AssemblyBuilder.DefineDynamicAssembly(aName,AssemblyBuilderAccess.Run);
            ModuleBuilder mb = ab.DefineDynamicModule(aName.Name);
            if (string.IsNullOrEmpty(enumName))
            {
                enumName = "DefalutEnum";
            }
            EnumBuilder eb = mb.DefineEnum(enumName,TypeAttributes.Public,typeof(int));

            foreach (var item in enumDictionary)
            {
                eb.DefineLiteral(item.Key,item.Value);
            }

            Type finished = eb.CreateType();
            Enum eEnum = Activator.CreateInstance(finished) as Enum;
            //foreach (object item in Enum.GetValues(eEnum.GetType()))
            //{
            //    Debug.LogError(string.Format("{0}.{1} = {2}", finished, item, ((int)item)));
            //}
            return eEnum;
        }

        /// <summary>
        /// 动态创建枚举
        /// </summary>
        /// <param name="enumDictionary">枚举元素列表</param>
        /// <param name="enumName">枚举名</param>
        /// <returns>Enum枚举</returns>
        public static Enum CreateEnum(List<string> enumList,string enumName = "DefalutEnum")
        {
            if (enumList == null || enumList.Count <= 0)
                return null;

            AppDomain currentDomain = AppDomain.CurrentDomain;
            AssemblyName aName = new AssemblyName("TempAssembly");
            AssemblyBuilder ab = AssemblyBuilder.DefineDynamicAssembly(aName,AssemblyBuilderAccess.Run);
            ModuleBuilder mb = ab.DefineDynamicModule(aName.Name);
            if (string.IsNullOrEmpty(enumName))
            {
                enumName = "DefalutEnum";
            }
            EnumBuilder eb = mb.DefineEnum(enumName,TypeAttributes.Public,typeof(int));

            for (int i = 0; i < enumList.Count; i++)
            {
                eb.DefineLiteral(enumList[i],i);
            }
            Type finished = eb.CreateType();
            Enum eEnum = Activator.CreateInstance(finished) as Enum;
            //foreach (object item in Enum.GetValues(eEnum.GetType()))
            //{
            //    Debug.LogError(string.Format("{0}.{1} = {2}", finished, item, ((int)item)));
            //}
            return eEnum;
        }

        /// <summary>
        /// 根据枚举int值获取枚举名称
        /// </summary>
        /// <typeparam name="T">枚举类型</typeparam>
        /// <param name="status">枚举值</param>
        /// <returns></returns>
        public static string GetEnumName<T>(this int status)
        {
            return Enum.GetName(typeof(T), status);
        }

        /// <summary>
        /// 根据枚举名称获取枚举值
        /// </summary>
        public static T ToEnumValue<T>(string name)
        {
            return (T)Enum.Parse(typeof(T),name);
        }


        /// <summary>
        /// 获取枚举变量值的 Description 属性
        /// </summary>
        /// <param name="obj">枚举变量</param>
        /// <returns>如果包含 Description 属性，则返回 Description 属性的值，否则返回枚举变量值的名称</returns>
        public static string GetDescription(this Enum obj)
        {
            return GetDescription(obj, false);
        }

        /// <summary>
        /// 获取枚举变量值的 Description 属性
        /// </summary>
        /// <param name="obj">枚举变量</param>
        /// <param name="isTop">是否改变为返回该类、枚举类型的头 Description 属性，而不是当前的属性或枚举变量值的 Description 属性</param>
        /// <returns>如果包含 Description 属性，则返回 Description 属性的值，否则返回枚举变量值的名称</returns>
        public static string GetDescription(this Enum obj, bool isTop)
        {
            if (obj == null)
            {
                return string.Empty;
            }
            Type enumType = obj.GetType();
            DescriptionAttribute dna;

            if (isTop)
            {
                dna = (DescriptionAttribute)Attribute.GetCustomAttribute(enumType, typeof(DescriptionAttribute));
            }
            else
            {
                FieldInfo fi = enumType.GetField(System.Enum.GetName(enumType, obj));
                dna = (DescriptionAttribute)Attribute.GetCustomAttribute(
                   fi, typeof(DescriptionAttribute));
            }
            if ((dna != null)
                && (string.IsNullOrEmpty(dna.Description) == false))
            {
                return dna.Description;
            }
            return obj.ToString();
        }


    }
}