"""Async retouch processing background task.

Creates its own DB session independent of the request session so the
HTTP response can return immediately while processing continues.
"""

from __future__ import annotations

import logging
import uuid
from typing import Any

from app.database import async_session_factory
from app.services.retouch_service import process_retouch

logger = logging.getLogger(__name__)


async def run_retouch_processing(
    result_id: uuid.UUID,
    vehicle_info: dict[str, Any] | None = None,
) -> None:
    """Background task: process retouch result asynchronously.

    Creates its own DB session (independent of the request session)
    so the HTTP response can return immediately.
    """
    async with async_session_factory() as session:
        try:
            await process_retouch(session, result_id, vehicle_info)
            await session.commit()
            logger.info("Retouch processing completed for result %s", result_id)
        except Exception as exc:
            await session.rollback()
            logger.error("Retouch background task failed for %s: %s", result_id, exc)
            raise
        finally:
            await session.close()