"""ORM row for the global, database-backed upload policy."""

from __future__ import annotations

from datetime import UTC, datetime

from sqlalchemy import Integer, String
from sqlalchemy.orm import Mapped, mapped_column

from deerflow.persistence.base import Base
from deerflow.persistence.types import BeijingDateTime, PortableJSON


class UploadPolicyRow(Base):
    __tablename__ = "upload_policy"

    # A named singleton keeps the schema extensible if scoped policies are
    # introduced later without requiring a table redesign.
    scope: Mapped[str] = mapped_column(String(64), primary_key=True, default="global")
    policy_json: Mapped[dict] = mapped_column(PortableJSON(), default=dict)
    revision: Mapped[int] = mapped_column(Integer, default=1, server_default="1")
    updated_by: Mapped[str | None] = mapped_column(String(64))
    updated_at: Mapped[datetime] = mapped_column(
        BeijingDateTime(), default=lambda: datetime.now(UTC), onupdate=lambda: datetime.now(UTC)
    )