from datetime import datetime
from typing import TYPE_CHECKING

from sqlalchemy import ForeignKey
from sqlalchemy.orm import Mapped, mapped_column, relationship

from models.base import BaseModel

if TYPE_CHECKING:
    from models import Project, CardStatus, Card


class Board(BaseModel):
    __tablename__ = "boards"

    id: Mapped[int] = mapped_column(primary_key=True)
    name: Mapped[str] = mapped_column(nullable=False)
    created_at: Mapped[datetime] = mapped_column(nullable=False)
    is_deleted: Mapped[bool] = mapped_column(default=False)
    ordinal_number: Mapped[int] = mapped_column(nullable=False)

    project_id: Mapped[int] = mapped_column(ForeignKey('projects.id'), nullable=False)
    project: Mapped["Project"] = relationship(
        "Project",
        back_populates="boards",
        lazy="selectin",
    )

    statuses: Mapped[list["CardStatus"]] = relationship("CardStatus", back_populates="board", lazy="selectin", cascade="all,delete")

    cards: Mapped[list["Card"]] = relationship("Card", uselist=True, back_populates="board", lazy="selectin")