from typing import List, Optional, TYPE_CHECKING
if TYPE_CHECKING:
    from .rooms import Room

from sqlalchemy import Identity, Integer, Unicode
from sqlalchemy.orm import Mapped, mapped_column, relationship

from . import db

class RoomFunction(db.Model):
    __tablename__ = 'Room Functions'

    id: Mapped[int] = mapped_column("ID", Integer, Identity(start=1, increment=1), primary_key=True)
    description: Mapped[Optional[str]] = mapped_column("Function", Unicode(255), nullable=True)

    rooms: Mapped[List['Room']] = relationship('Room', back_populates='room_function')

    def __repr__(self):
        return f"<RoomFunction(id={self.id}, description={repr(self.description)})>"