package bouquins

import "database/sql"

// SUB QUERIES //

func (app *Bouquins) queryAuthorBooks(author *AuthorFull) error {
	stmt, err := app.ps(AUTHOR_BOOKS)
	if err != nil {
		return err
	}
	rows, err := stmt.Query(author.Id)
	if err != nil {
		return err
	}
	defer rows.Close()
	for rows.Next() {
		book := new(BookAdv)
		var seriesId sql.NullInt64
		var seriesName sql.NullString
		if err = rows.Scan(&book.Id, &book.Title, &book.SeriesIndex, &seriesName, &seriesId); err != nil {
			return err
		}
		if seriesId.Valid && seriesName.Valid {
			book.Series = &Series{
				seriesId.Int64,
				seriesName.String,
			}
		}
		author.Books = append(author.Books, book)
	}
	if err := rows.Err(); err != nil {
		return err
	}
	return nil
}

func (app *Bouquins) queryAuthorAuthors(author *AuthorFull) error {
	// TODO
	return nil
}

func (app *Bouquins) queryAuthor(id int64) (*AuthorFull, error) {
	stmt, err := app.ps(AUTHOR)
	if err != nil {
		return nil, err
	}
	author := new(AuthorFull)
	author.Id = id
	err = stmt.QueryRow(id).Scan(&author.Name)
	if err != nil {
		return nil, err
	}
	return author, nil
}

// DB LOADS //

func (app *Bouquins) AuthorFull(id int64) (*AuthorFull, error) {
	author, err := app.queryAuthor(id)
	if err != nil {
		return nil, err
	}
	err = app.queryAuthorBooks(author)
	if err != nil {
		return nil, err
	}
	err = app.queryAuthorAuthors(author)
	if err != nil {
		return nil, err
	}
	return author, nil
}