using System;
using System.Collections;
using System.Collections.Generic;
using System.Data;
using System.Linq;
using System.Text;
using AutoMapper;

namespace YinLong.Framework.Mapper
{
    /// <summary>
    /// AutoMapper(4.1.1.0)扩展帮助类(Mapper.Initialize(x => x.CreateMap<UserA, UserB>());)
    /// </summary>
    public static class AutoMapperHelper
    {
        /// <summary>
        ///  类型映射
        /// </summary>
        public static T MapTo<T>(this object obj)
        {
            if (obj == null) return default(T);
            AutoMapper.Mapper.CreateMap(obj.GetType(), typeof(T));
            return AutoMapper.Mapper.Map<T>(obj);
        }
        /// <summary>
        /// 集合列表类型映射
        /// </summary>
        public static List<TDestination> MapToList<TDestination>(this IEnumerable source)
        {
            foreach (var first in source)
            {
                var type = first.GetType();
                AutoMapper.Mapper.CreateMap(type, typeof(TDestination));
                break;
            }
            return AutoMapper.Mapper.Map<List<TDestination>>(source);
        }
        /// <summary>
        /// 集合列表类型映射
        /// </summary>
        public static List<TDestination> MapToList<TSource, TDestination>(this IEnumerable<TSource> source)
        {
            //IEnumerable<T> 类型需要创建元素的映射
            AutoMapper.Mapper.CreateMap<TSource, TDestination>();
            return AutoMapper.Mapper.Map<List<TDestination>>(source);
        }
        /// <summary>
        /// 类型映射
        /// </summary>
        public static TDestination MapTo<TSource, TDestination>(this TSource source, TDestination destination)
            where TSource : class
            where TDestination : class
        {
            if (source == null) return destination;
            AutoMapper.Mapper.CreateMap<TSource, TDestination>();
            return AutoMapper.Mapper.Map(source, destination);
        }
        /// <summary>
        /// DataReader映射
        /// </summary>
        public static IEnumerable<T> DataReaderMapTo<T>(this IDataReader reader)
        {
            AutoMapper.Mapper.Reset();
            AutoMapper.Mapper.CreateMap<IDataReader, IEnumerable<T>>();
            return AutoMapper.Mapper.Map<IDataReader, IEnumerable<T>>(reader);
        }
    }
}