"""Модели справочников: федеральные округа и регионы."""
from datetime import datetime

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

from app.db.session import Base


class FederalDistrict(Base):
    __tablename__ = "federal_districts"

    id: Mapped[int] = mapped_column(primary_key=True)
    name: Mapped[str] = mapped_column(String(100), unique=True)
    code: Mapped[str | None] = mapped_column(String(20), unique=True)
    created_at: Mapped[datetime] = mapped_column(DateTime(timezone=True), server_default=func.now())

    regions: Mapped[list["Region"]] = relationship(back_populates="district")


class Region(Base):
    __tablename__ = "regions"

    id: Mapped[int] = mapped_column(primary_key=True)
    name: Mapped[str] = mapped_column(String(200), unique=True)
    federal_district_id: Mapped[int] = mapped_column(ForeignKey("federal_districts.id"))
    status: Mapped[str] = mapped_column(String(20), default="active")
    created_at: Mapped[datetime] = mapped_column(DateTime(timezone=True), server_default=func.now())
    updated_at: Mapped[datetime] = mapped_column(
        DateTime(timezone=True), server_default=func.now(), onupdate=func.now()
    )

    district: Mapped[FederalDistrict] = relationship(back_populates="regions")