from __future__ import annotations
from datetime import datetime
from typing import Optional
from sqlalchemy import ForeignKey, String, JSON, func, DateTime
from sqlalchemy.orm import Mapped, mapped_column
from app.db.session import Base

class AuditLog(Base):
    __tablename__ = "audit_logs"

    id: Mapped[int] = mapped_column(primary_key=True)
    user_id: Mapped[Optional[int]] = mapped_column(ForeignKey("users.id", ondelete="SET NULL"))
    action: Mapped[str] = mapped_column(String(64))
    payload: Mapped[Optional[dict]] = mapped_column(JSON)
    created_at: Mapped[datetime] = mapped_column(DateTime(timezone=True), server_default=func.now())