using Bibblan.Models;
using Bibblan.ViewModels;

namespace Bibblan.Business.Services
{
    public class CalibreService
    {
        CalibreContext _context;
        public CalibreService(CalibreContext context)
        {
            _context = context;
        }

        public IQueryable<BookVm> GetAllBooks()
        {
            return from b in _context.Books
                   join ba in _context.BooksAuthorsLink on b.Id equals ba.Book
                   join a in _context.Authors on ba.Author equals a.Id
                   join comment in _context.Comments on b.Id equals comment.Book into comments
                   from comment in comments.DefaultIfEmpty()
                   join bl in _context.BooksLanguagesLink on b.Id equals bl.Book
                   join l in _context.Languages on bl.LangCode equals l.Id
                   join bs in _context.BooksSeriesLink on b.Id equals bs.Book into book_series_link
                   from bs in book_series_link.DefaultIfEmpty()
                   join s in _context.Series on bs.Series equals s.Id into series
                   from s in series.DefaultIfEmpty()
                   orderby b.Title
                   select new BookVm
                   {
                       Id = b.Id,
                       Title = b.Title,
                       AuthorId = a.Id,
                       Author = a.Sort,
                       Comments = comment.Text,
                       Language = l.LangCode,
                       Path = b.Path,
                       HasCover = b.HasCover == "1",
                       Formats = (from d in _context.Data where d.Book == b.Id orderby d.Format select new DataVm { Id = d.Id, Format = d.Format, FileName = d.Name + "." + d.Format.ToLower() }).ToList(),
                       SeriesName = s.Name,
                       SeriesNumber = b.SeriesIndex
                   };
        }
    }
}