from typing import List
from sqlalchemy import String, ForeignKey
from sqlalchemy.orm import DeclarativeBase, Mapped, mapped_column,  relationship
from crudkit import CrudMixin

class Base(DeclarativeBase):
    pass

class Author(CrudMixin, Base):
    __tablename__ = "author"
    name: Mapped[str] = mapped_column(String(200), nullable=False)
    books: Mapped[List["Book"]] = relationship(back_populates="author", cascade="all, delete-orphan")

class Book(CrudMixin, Base):
    __tablename__ = "book"
    title: Mapped[str] = mapped_column(String(200), nullable=False)
    author_id: Mapped[int] = mapped_column(ForeignKey("author.id"), nullable=False)
    author: Mapped[Author] = relationship(back_populates="books")