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from __future__ import annotations

import asyncio

from app.core.logger import get_logger
from app.services.cleanup import CleanupService

logger = get_logger(__name__)


class CleanupWorker:
    def __init__(self, service: CleanupService, interval_seconds: int) -> None:
        self.service = service
        self.interval_seconds = interval_seconds
        self._task: asyncio.Task[None] | None = None
        self._stop = asyncio.Event()

    async def start(self) -> None:
        self._stop.clear()
        self._task = asyncio.create_task(self._run(), name="media-cleanup-worker")

    async def stop(self) -> None:
        self._stop.set()
        if self._task:
            self._task.cancel()
            try:
                await self._task
            except asyncio.CancelledError:
                logger.debug("cleanup worker task cancelled")
            self._task = None

    async def _run(self) -> None:
        while not self._stop.is_set():
            try:
                removed = await self.service.cleanup_expired()
                if removed:
                    logger.info("cleanup worker removed workspaces", extra={"count": removed})
            except asyncio.CancelledError:
                raise
            except Exception:
                logger.exception("cleanup worker iteration failed")
            try:
                await asyncio.wait_for(self._stop.wait(), timeout=self.interval_seconds)
            except asyncio.TimeoutError:
                continue