using Nelibur.ObjectMapper;
using System;
using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.ComponentModel;
using System.ComponentModel.DataAnnotations;
using System.Dynamic;
using System.Linq;
using System.Threading;

namespace Hncore.Infrastructure.Extension
{
    public static class ObjectExtension
    {
        /// <summary>
        /// 将对象[主要是匿名对象]转换为dynamic
        /// </summary>
        public static dynamic ToDynamic(this object obj, decimal defaultVal)
        {
            decimal result;
            if (obj != null)
                if (decimal.TryParse(obj.ToString(), out result))
                    return result;
                else
                    return defaultVal;
            return defaultVal;
        }

        // This extension method is broken out so you can use a similar pattern with 
        // other MetaData elements in the future. This is your base method for each.
        public static T GetAttribute<T>(this object value) where T : Attribute
        {
            var type = value.GetType();
            var memberInfo = type.GetMember(value.ToString());
            if (!memberInfo.Any())
            {
                return null;
            }

            var attributes = memberInfo[0].GetCustomAttributes(typeof(T), false);
            return (T) attributes[0];
        }

        // This method creates a specific call to the above method, requesting the
        // Description MetaData attribute.
        public static string GetDescription(this object value)
        {
            var desAttribute = value.GetAttribute<DescriptionAttribute>();
            if (desAttribute != null)
            {
                return desAttribute.Description;
            }

            var displayAttribute = value.GetAttribute<DisplayAttribute>();
            if (displayAttribute != null)
            {
                return displayAttribute.Name ?? displayAttribute.Description;
            }

            return "";
        }

        #region 得到枚举字典（key对应枚举的值，value对应枚举的注释）

        /// <summary>
        /// 得到枚举字典（key对应枚举的值，value对应枚举的注释）
        /// </summary>
        /// <typeparam name="TEnum"></typeparam>
        /// <returns></returns>
        public static Dictionary<Enum, string> ToDescriptionDictionary<TEnum>()
        {
            Array values = Enum.GetValues(typeof(TEnum));
            Dictionary<Enum, string> nums = new Dictionary<Enum, string>();
            foreach (Enum value in values)
            {
                nums.Add(value, GetDescription(value));
            }

            return nums;
        }

        #endregion

        #region 实体中string属性执行Trim()
        /// <summary>
        /// 对象string属性执行Trim()
        /// </summary>
        /// <typeparam name="T"></typeparam>
        /// <param name="t"></param>
        /// <returns></returns>
        public static T ObjectStrTrim<T>(this T t) where T:new ()
        {
            if (t != null)
            {
                foreach (var pi in t.GetType().GetProperties())
                {
                    if (pi.PropertyType.Equals(typeof(string)) && pi.GetValue(t, null) != null)//判断属性的类型是不是String
                    {
                        pi.SetValue(t, pi.GetValue(t, null).ToString().Trim(), null);//给泛型的属性赋值
                    }
                }
            }
            return t;
        }
        #endregion

        #region 
        public static T save<T>(this T obj,string key) where T:class,new()
        {
            Dictionary<string, object> dic = c.Value ?? new Dictionary<string, object>();
            dic.Add(key,obj);
            c.Value = dic;
            return obj;
        }
        public static AsyncLocal<Dictionary<string,Object>> c=new AsyncLocal<Dictionary<string, Object>>();
        #endregion

        #region 对象转换

        public static T MapTo<T>(this Object model)
        {
            var productDto = TinyMapper.Map<T>(model);

            return productDto;
        }
        public static IEnumerable<T> MapsTo<T>(this Object model)
        {
            var generic = model.GetType().GetGenericTypeDefinition();
           
            if (generic == typeof(List<>))
            {
                return TinyMapper.Map<List<T>>(model);
            }
            if (generic == typeof(Collection<>))
            {
                return TinyMapper.Map<Collection<T>>(model);
            }

            throw new Exception("不合法的转换");
        }

        #endregion
    }
}