using LibraryDTO;
using Model;
using static Stub.Mapper;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace Stub
{
    public static class Extensions
    {
        public static Ratings ToPoco(this RatingsDTO dto)
            => new Ratings() { Average = dto.Average, Count = dto.Count };
        public static IEnumerable<Ratings> ToPocos(this IEnumerable<RatingsDTO> dtos)
            => dtos.Select(dto => dto.ToPoco());

        public static Contributor ToPoco(this ContributorDTO dto)
            => new Contributor { Name = dto.Name, Role = dto.Role };
        public static IEnumerable<Contributor> ToPocos(this IEnumerable<ContributorDTO> dtos)
            => dtos.Select(dto => dto.ToPoco());

        public static Link ToPoco(this LinkDTO dto)
            => new Link { Title = dto.Title, Url = dto.Url };
        public static IEnumerable<Link> ToPocos(this IEnumerable<LinkDTO> dtos)
            => dtos.Select(dto => dto.ToPoco());

        public static Author ToPoco(this AuthorDTO dto)
        {
            var result = AuthorsMapper.GetT(dto);
            if (result == null)
            {
                result = new Author
                {
                    AlternateNames = dto.AlternateNames,
                    Bio = dto.Bio,
                    BirthDate = dto.BirthDate,
                    DeathDate = dto.DeathDate,
                    Id = dto.Id,
                    Links = dto.Links.ToPocos().ToList(),
                    Name = dto.Name
                };
            }
            return result;
        }
        public static IEnumerable<Author> ToPocos(this IEnumerable<AuthorDTO> dtos)
            => dtos.Select(dto => dto.ToPoco());

        public static Work ToPoco(this WorkDTO dto)
        {
            var result = WorksMapper.GetT(dto);
            if (result == null)
            {
                result = new Work
                {
                    Authors = dto.Authors.ToPocos().ToList(),
                    Description = dto.Description,
                    Id = dto.Id,
                    Ratings = dto.Ratings.ToPoco(),
                    Subjects = dto.Subjects,
                    Title = dto.Title
                };
            }
            return result;
        }
        public static IEnumerable<Work> ToPocos(this IEnumerable<WorkDTO> dtos)
            => dtos.Select(dto => dto.ToPoco());

        public static Book ToPoco(this BookDTO dto)
        {
            var result = BooksMapper.GetT(dto);
            if (result == null)
            {
                result = new Book
                {
                    Authors = dto.Authors.ToPocos().ToList(),
                    Contributors = dto.Contributors.ToPocos().ToList(),
                    Format = dto.Format,
                    Id = dto.Id,
                    ISBN13 = dto.ISBN13,
                    Language = dto.Language.ToModel(),
                    NbPages = dto.NbPages,
                    PublishDate = dto.PublishDate,
                    Publishers = dto.Publishers,
                    Series = dto.Series,
                    Title = dto.Title,
                    Works = dto.Works.ToPocos().ToList()
                };
            }
            return result;
        }
        public static IEnumerable<Book> ToPocos(this IEnumerable<BookDTO> dtos)
            => dtos.Select(dto => dto.ToPoco());
    }
}