from sqlalchemy import Column, String, Integer, ForeignKey, DateTime
from sqlalchemy.orm import relationship
from sqlalchemy.sql import func
from core.database import Base
import uuid

class Book(Base):
    __tablename__ = "books"
    id = Column(String, primary_key=True, default=lambda: str(uuid.uuid4()))
    title = Column(String, nullable=False)
    author = Column(String, nullable=False)
    description = Column(String)
    page_count = Column(Integer)
    published_date = Column(DateTime)
    genre_id = Column(String, ForeignKey("genres.id"))
    genre = relationship("Genre", back_populates="books")
    created_at = Column(DateTime, default=func.now())
    updated_at = Column(DateTime, default=func.now(), onupdate=func.now())