"""操作审计日志服务 — 轻量级，各 endpoint 直接调用。"""
from typing import Optional
from sqlalchemy.ext.asyncio import AsyncSession
from fastapi import Request

from app.models.operation_log import OperationLog


async def log_operation(
    db: AsyncSession,
    *,
    action: str,
    resource_type: Optional[str] = None,
    resource_id: Optional[int] = None,
    detail: Optional[str] = None,
    user_id: Optional[int] = None,
    username: Optional[str] = None,
    request: Optional[Request] = None,
) -> None:
    """记录操作日志（fire-and-forget，不抛异常）。"""
    try:
        ip_address = None
        user_agent = None
        if request:
            forwarded = request.headers.get("x-forwarded-for")
            ip_address = forwarded.split(",")[0].strip() if forwarded else (
                request.client.host if request.client else None
            )
            user_agent = request.headers.get("user-agent", "")[:255]

        log = OperationLog(
            user_id=user_id,
            username=username,
            action=action,
            resource_type=resource_type,
            resource_id=resource_id,
            detail=detail,
            ip_address=ip_address,
            user_agent=user_agent,
        )
        db.add(log)
        await db.flush()
    except Exception:
        # 审计日志不应影响业务流程
        pass