from datetime import datetime

from sqlalchemy import DateTime, ForeignKey, Integer, UniqueConstraint, func
from sqlalchemy.orm import Mapped, mapped_column, relationship

from app.db.base import Base


class Favorite(Base):
    __tablename__ = "favorites"
    __table_args__ = (UniqueConstraint("user_id", "spot_id", name="uq_user_spot"),)

    id: Mapped[int] = mapped_column(primary_key=True, autoincrement=True)
    user_id: Mapped[int] = mapped_column(
        Integer, ForeignKey("users.id"), nullable=False
    )
    spot_id: Mapped[int] = mapped_column(
        Integer, ForeignKey("spots.id"), nullable=False
    )
    created_at: Mapped[datetime] = mapped_column(
        DateTime(timezone=True), server_default=func.now()
    )

    user = relationship("User", lazy="selectin")
    spot = relationship("Spot", lazy="selectin")

    def __repr__(self) -> str:
        return f"<Favorite user={self.user_id} spot={self.spot_id}>"