from typing import List
from typing import Optional
from sqlalchemy import String, ForeignKey, Integer
from sqlalchemy.orm import Mapped
from sqlalchemy.orm import mapped_column
from sqlalchemy.orm import relationship

from .base import Base

class Book(Base):
    __tablename__ = "book"
    id: Mapped[int] = mapped_column(primary_key=True)
    hash: Mapped[Optional[str]] = mapped_column(String(255))
    file_name: Mapped[Optional[str]] = mapped_column(String(65656))
    file_path: Mapped[Optional[str]] = mapped_column(String(65656))
    name: Mapped[str] = mapped_column(String(65656))
    publisher: Mapped[Optional[str]] = mapped_column(String(65656))
    notes: Mapped[Optional[str]] = mapped_column(String(65656))
    classification: Mapped[Optional[int]] = mapped_column(Integer)

    library_id: Mapped[int] = mapped_column(ForeignKey("library.id"))
    library: Mapped[int] = relationship("Library", back_populates="books")

    tags: Mapped[List["BookTag"]] = relationship(
        back_populates="book", cascade="all, delete-orphan"
    )

    def __repr__(self) -> str:
        return f"Book(id={self.id!r}, name={self.name!r}, publisher={self.publisher!r}, " \
               f"notes={self.notes!r}, classification={self.classification!r}), " \
               f"hash={self.hash!r}, file_name={self.file_name}, file_path={self.file_path})"