#!/usr/bin/env python3
"""Run the independent calculation supervisor (never an API lifespan task)."""
import argparse
import asyncio
from pathlib import Path
import signal
import sys

sys.path.insert(0, str(Path(__file__).resolve().parents[1]))

from dotenv import load_dotenv

from app.services.calculation_worker import CalculationWorker, WorkerSettings


async def main():
    load_dotenv(Path(__file__).resolve().parents[1] / '.env', override=False)
    task = asyncio.create_task(CalculationWorker(WorkerSettings.from_environment()).run())
    loop = asyncio.get_running_loop()
    for signum in (signal.SIGTERM, signal.SIGINT):
        loop.add_signal_handler(signum, task.cancel)
    try:
        await task
    except asyncio.CancelledError:
        pass


if __name__ == '__main__':
    argparse.ArgumentParser(description=__doc__).parse_args()
    asyncio.run(main())