"""Background task utilities for long-running operations."""

import asyncio
from collections.abc import Callable


class BackgroundTasks:
    """Simple background task manager using FastAPI BackgroundTasks."""

    @staticmethod
    async def run_in_background(func: Callable, *args, **kwargs):
        """
        Run function in background.

        For now, uses asyncio to run tasks in background.
        In production, consider Celery or similar for distributed tasks.

        Args:
            func: Function to run
            *args: Positional arguments
            **kwargs: Keyword arguments
        """
        asyncio.create_task(func(*args, **kwargs))


async def generate_thumbnails_task(image_id: str, storage_path: str, contents: bytes):
    """
    Background task to generate thumbnails.

    Args:
        image_id: Image ID
        storage_path: Original image storage path
        contents: Image file contents
    """
    from uuid import UUID

    from app.images.processing import generate_thumbnails

    # Generate thumbnails
    generate_thumbnails(UUID(image_id), storage_path, contents)

    # Update image metadata with thumbnail paths
    # This would require database access - for now, thumbnails are generated synchronously
    pass