using AutoMapper;
using Microsoft.Extensions.DependencyInjection;

namespace SiNan.Common.Extensions
{
    public static class MapperExtension
    {
        private static IMapper _mapper;

        /// <summary>
        /// 注册对象映射器
        /// </summary>
        /// <param name="services"></param>
        /// <param name="profile"></param>
        /// <returns></returns>
        public static IServiceCollection AddMapper(this IServiceCollection services, Profile profile)
        {
            var config = new MapperConfiguration(cfg =>
            {
                cfg.AddProfile(profile);
            });
            _mapper = config.CreateMapper();
            return services;
        }

        /// <summary>
        /// 设置对象映射执行者
        /// </summary>
        /// <param name="mapper">映射执行者</param>
        public static void SetMapper(IMapper mapper)
        {
            _mapper = mapper;
        }

        /// <summary>
        /// 将对象映射为指定类型
        /// </summary>
        /// <typeparam name="TTarget">要映射的目标类型</typeparam>
        /// <param name="source">源对象</param>
        /// <returns>目标类型的对象</returns>
        public static TTarget Map<TTarget>(this object source)
        {
            return _mapper.Map<TTarget>(source);
        }

        /// <summary>
        /// 使用源类型的对象更新目标类型的对象
        /// </summary>
        /// <typeparam name="TSource">源类型</typeparam>
        /// <typeparam name="TTarget">目标类型</typeparam>
        /// <param name="source">源对象</param>
        /// <param name="target">待更新的目标对象</param>
        /// <returns>更新后的目标类型对象</returns>
        public static TTarget Map<TSource, TTarget>(this TSource source, TTarget target)
        {
            return _mapper.Map(source, target);
        }
    }
}