from datetime import datetime

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

from app.models.base import Base


class SystemConfig(Base):
    __tablename__ = "system_config"

    key: Mapped[str] = mapped_column(String(100), primary_key=True)
    value: Mapped[str] = mapped_column(String(1000), default="")
    updated_at: Mapped[datetime | None] = mapped_column(DateTime(timezone=True), nullable=True)
    updated_by_id: Mapped[int | None] = mapped_column(
        ForeignKey("master_user.id", ondelete="SET NULL"), nullable=True
    )