using AutoMapper;
using AutoMapper.Configuration;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Linq.Expressions;
using System.Text;
using System.Threading.Tasks;

namespace OnlyPrompt.Backend.Utils
{
	public static class AutomapperExtensions
	{

		public static IMappingExpression<TSource, TDestination> CreateUpdateMap<TSource, TDestination>(this IMapperConfigurationExpression cfg, MemberList memberList = MemberList.Source)
		{
			return cfg.CreateMap<TSource, TDestination>(memberList)
				.IgnoreNullMembers();
		}

		public static IMappingExpression<TSource, TDestination> MapMemberFrom<TSource, TDestination, TMember, TSourceMember>(this IMappingExpression<TSource, TDestination> mapping, Expression<Func<TDestination, TMember>> destinationMember, Expression<Func<TSource, TSourceMember>> sourceMember)
		{
			mapping.ForMember(destinationMember, x => x.MapFrom(sourceMember));
			return mapping;
		}

		public static IMappingExpression<TSource, TDestination> IgnoreNullMembers<TSource, TDestination>(this IMappingExpression<TSource, TDestination> mapping)
		{
			mapping.ForAllMembers(opts => opts.Condition((src, dest, member) => src != null));
			return mapping;
		}

		public static IMappingExpression<TSource, TDestination> MapCtorParamFrom<TSource, TDestination, TMember, TSourceMember>(this IMappingExpression<TSource, TDestination> mapping, Expression<Func<TDestination, TMember>> destinationMember, Expression<Func<TSource, TSourceMember>> sourceMember)
		{
			mapping.ForCtorParam(destinationMember, x => x.MapFrom(sourceMember));
			return mapping;
		}

		public static IMappingExpression<TSource, TDestination> ForCtorParam<TSource, TDestination, DValue>(this IMappingExpression<TSource, TDestination> mapping, Expression<Func<TDestination, DValue>> paramSelector, Action<ICtorParamConfigurationExpression<TSource>> configure)
		{
			var ctorParamName = ((MemberExpression)paramSelector.Body).Member.Name;
			mapping.ForCtorParam(ctorParamName, configure);
			return mapping;
		}


	}
}