"""系统配置模型"""

from datetime import datetime, timezone

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

from app.database import Base


class SystemConfig(Base):
    __tablename__ = "system_configs"

    id: Mapped[str] = mapped_column(String(36), primary_key=True)
    key: Mapped[str] = mapped_column(String(100), unique=True, nullable=False, index=True)
    value: Mapped[str] = mapped_column(Text, nullable=False)
    updated_at: Mapped[datetime] = mapped_column(
        DateTime,
        default=lambda: datetime.utcnow(),
        onupdate=lambda: datetime.utcnow(),
    )
    updated_by: Mapped[str | None] = mapped_column(
        String(36), ForeignKey("users.id", ondelete="SET NULL"), nullable=True
    )