from typing import Optional, TYPE_CHECKING, List
if TYPE_CHECKING:
    from .areas import Area  
    from .room_functions import RoomFunction
    from .inventory import Inventory
    from .users import User

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

from . import db

class Room(db.Model):
    __tablename__ = 'Rooms'

    id: Mapped[int] = mapped_column("ID", Integer, Identity(start=1, increment=1), primary_key=True)
    name: Mapped[Optional[str]] = mapped_column("Room", Unicode(255), nullable=True)    
    area_id: Mapped[Optional[int]] = mapped_column("Area", Integer, ForeignKey("Areas.ID"))
    function_id: Mapped[Optional[int]] = mapped_column("Function", Integer, ForeignKey("Room Functions.ID"))

    area: Mapped[Optional['Area']] = relationship('Area', back_populates='rooms')
    room_function: Mapped[Optional['RoomFunction']] = relationship('RoomFunction', back_populates='rooms')
    inventory: Mapped[List['Inventory']] = relationship('Inventory', back_populates='location')
    users: Mapped[List['User']] = relationship('User', back_populates='location')

    def __init__(self, name: Optional[str] = None, area_id: Optional[int] = None, function_id: Optional[int] = None):
        self.name = name
        self.area_id = area_id
        self.function_id = function_id

    def __repr__(self):
        return f"<Room(id={self.id}, room={repr(self.name)}, area_id={self.area_id}, function_id={self.function_id})>"
    
    @property
    def full_name(self):
        name = self.name or ""
        func = self.room_function.description if self.room_function else ""
        return f"{name} - {func}".strip(" -")
    
    def serialize(self):
        return {
            'id': self.id,
            'name': self.name,
            'area_id': self.area_id,
            'function_id': self.function_id
        }