import logging

from django.apps import AppConfig

logger = logging.getLogger(__name__)


class LibraryConfig(AppConfig):
    name = "apps.library"

    def ready(self):
        """Ephemeral similarity-check files never survive a restart."""
        from . import similarity

        try:
            deleted = similarity.purge_similarity_files()
        except OSError as exc:
            logger.warning("Similarity file purge skipped: %s", exc)
        else:
            if deleted:
                logger.info("Purged %s similarity file(s) on startup", deleted)