# app/celery_app.py

from celery import Celery
from celery.signals import task_failure, worker_ready

from app.config import settings

celery = Celery(
    "document_processor",
    broker=settings.redis_url,
    backend=settings.redis_url,
)


# Optionally add this line to retain connection retry behavior at startup:
celery.conf.broker_connection_retry_on_startup = True

# Set the default queue and routing so that tasks are enqueued on "document_processor"
celery.conf.task_default_queue = "document_processor"
celery.conf.task_routes = {
    "app.tasks.*": {"queue": "document_processor"},
}


@worker_ready.connect
def init_sentry_on_worker_ready(**kwargs):
    """Initialise Sentry SDK in the Celery worker process."""
    from app.utils.sentry import init_sentry

    init_sentry(integrations_extra=["celery"])


@task_failure.connect
def task_failure_handler(
    sender=None, task_id=None, exception=None, args=None, kwargs=None, traceback=None, einfo=None, **kw
):
    """Handler for Celery task failures to send notifications"""
    if getattr(settings, "notify_on_task_failure", True):
        try:
            # Import here to avoid circular imports
            from app.utils.notification import notify_celery_failure

            notify_celery_failure(
                task_name=sender.name if sender else "Unknown",
                task_id=task_id or "N/A",
                exc=exception,
                args=args or [],
                kwargs=kwargs or {},
            )
        except Exception as e:
            import logging

            logging.exception(f"Failed to send task failure notification: {e}")