package adapter

import (
	"errors"

	"git.artlef.fr/bibliomane/internal/appcontext"
	"git.artlef.fr/bibliomane/internal/dto"
	"git.artlef.fr/bibliomane/internal/model"
	"gorm.io/gorm"
)

func FillBookDbFromFields(ac appcontext.AppContext, fields *dto.BookFields, book *model.Book) error {
	if fields.Title != nil {
		book.Title = *fields.Title
	}
	if fields.ISBN != nil {
		book.ISBN = *fields.ISBN
	}
	if fields.InventaireID != nil {
		book.InventaireID = *fields.InventaireID
	}
	if fields.OpenLibraryId != nil {
		book.OpenLibraryId = *fields.OpenLibraryId
	}
	if fields.ShortDescription != nil {
		book.SmallDescription = *fields.ShortDescription
	}
	if fields.Summary != nil {
		book.Summary = *fields.Summary
	}
	if fields.CoverID != nil {
		book.CoverID = *fields.CoverID
	}

	if fields.Author != nil {
		author, err := fetchOrCreateAuthor(ac, *fields.Author)
		if err != nil {
			return err
		}
		book.AuthorID = author.ID
	}
	return nil
}

func fetchOrCreateAuthor(ac appcontext.AppContext, name string) (*model.Author, error) {
	var author model.Author
	res := ac.Db.Where("name = ?", name).First(&author)
	err := res.Error
	if err != nil {
		if errors.Is(err, gorm.ErrRecordNotFound) {
			author = model.Author{Name: name}
			err = ac.Db.Save(&author).Error
			if err != nil {
				return &author, err
			}
			return &author, nil
		} else {
			return &author, err
		}
	} else {
		return &author, nil
	}
}