"""
Celery задачи для модуля communications
"""

from celery import shared_task
from django.utils import timezone
from datetime import timedelta
import logging

logger = logging.getLogger(__name__)


@shared_task
def cleanup_orphaned_attachments():
    """
    Очистка временных вложений без привязки к сообщению.
    Удаляет MessageAttachment с message=null старше 1 часа.
    """
    from communications.models import MessageAttachment

    cutoff_time = timezone.now() - timedelta(hours=1)

    orphaned = MessageAttachment.objects.filter(
        message__isnull=True, uploaded_at__lt=cutoff_time
    )

    count = orphaned.count()

    if count > 0:
        logger.info(
            "Orphaned chat attachments found",
            extra={
                "event": "chat.attachment_cleanup.started",
                "attachment_count": count,
                "cutoff_at": cutoff_time,
            },
        )

        # Удаляем файлы и записи
        for attachment in orphaned:
            try:
                if attachment.file:
                    attachment.file.delete()
                attachment.delete()
            except Exception as e:
                logger.exception(
                    "Orphaned chat attachment deletion failed",
                    extra={
                        "event": "chat.attachment_cleanup.item_failed",
                        "attachment_id": attachment.id,
                        "error_type": type(e).__name__,
                    },
                )

        logger.info(
            "Orphaned chat attachment cleanup completed",
            extra={
                "event": "chat.attachment_cleanup.completed",
                "attachment_count": count,
            },
        )

    return count