"""JARVIS task utilities."""
import asyncio
from datetime import datetime
from logging import Logger
from typing import Coroutine


async def runat(when: datetime, coro: Coroutine, logger: Logger) -> None:
    """
    Run a task at a scheduled time.

    Args:
        when: When to run the task
        coro: Coroutine to execute
        logger: Global logger
    """
    logger.debug(f"Scheduling task {coro.__name__} for {when.isoformat()}")
    delay = when - datetime.utcnow()
    await asyncio.sleep(delay.total_seconds())
    await coro