"""Periodic cleanup of expired files."""

import time
from pathlib import Path

from config import CLEANUP_INTERVAL


def cleanup_loop(upload_dir: Path, max_age: int):
    if max_age <= 0:
        return
    while True:
        time.sleep(CLEANUP_INTERVAL)
        now = time.time()
        try:
            entries = list(upload_dir.iterdir())
        except OSError as e:
            print(f"  cleanup error: {e}")
            continue
        for f in entries:
            try:
                if f.is_file() and now - f.stat().st_mtime > max_age:
                    f.unlink()
                    print(f"  - expired: {f.name}")
            except OSError:
                pass