from datetime import datetime

from sqlalchemy import DateTime, String, Text, func
from sqlalchemy.orm import Mapped, mapped_column

from app.database import Base


class Setting(Base):
    """系统级 KV 设置。"""

    __tablename__ = "settings"

    key: Mapped[str] = mapped_column(String(64), primary_key=True)
    value: Mapped[str] = mapped_column(Text, nullable=False, default="")
    updated_at: Mapped[datetime] = mapped_column(
        DateTime, server_default=func.now(), onupdate=func.now(), nullable=False
    )