using AutoMapper;
using DigitalData.Core.Abstractions.Infrastructure;
using Microsoft.Extensions.DependencyInjection;

namespace DigitalData.Core.Infrastructure.AutoMapper;

public class EntityAutoMapperOptions
{
    public readonly MapperConfigurationExpression AutoMapperConfiguration = new ();

    private readonly IServiceCollection _services;

    private readonly Lazy<IMapper> _lazyCustomRootMapper;

    internal EntityAutoMapperOptions(IServiceCollection services)
    {
        _services = services;
        _lazyCustomRootMapper = new(() => new MapperConfiguration(AutoMapperConfiguration).CreateMapper());
    }

    public void CreateEntityMap<TEntity>(params Type[] typeOfDtos)
    {
        foreach (var typeOfDto in typeOfDtos)
        {
            AutoMapperConfiguration.CreateMap(typeof(TEntity), typeOfDto);
            AutoMapperConfiguration.CreateMap(typeOfDto, typeof(TEntity));
        }

        _services.AddSingleton<IEntityMapper<TEntity>, EntityAutoMapper<TEntity>>(provider => new EntityAutoMapper<TEntity>(_lazyCustomRootMapper.Value));
    }

    public void CreateEntityMap<TEntity>() => _services.AddSingleton<IEntityMapper<TEntity>, EntityAutoMapper<TEntity>>();
}