"""Celery app factory."""

from celery import Celery

from ..core.config import settings


def _broker_url() -> str:
    return settings.celery.broker_url or settings.redis.url


def _result_backend() -> str:
    return settings.celery.result_backend or settings.redis.url


celery_app = Celery(
    "iaai_scraper",
    broker=_broker_url(),
    backend=_result_backend(),
)

celery_app.conf.update(
    # Сериализация.
    task_serializer="json",
    accept_content=["json"],
    result_serializer="json",
    timezone="UTC",
    enable_utc=True,

    # Лимиты.
    task_soft_time_limit=settings.celery.task_soft_time_limit,
    task_time_limit=settings.celery.task_time_limit,
    worker_concurrency=settings.celery.worker_concurrency,

    # Playwright sync API: prefork + 1 процесс.
    worker_pool="prefork",
    worker_prefetch_multiplier=1,

    # Retry policy брокера.
    broker_connection_retry_on_startup=True,

    # Beat schedule.
    beat_schedule={
        "periodic-sync-listing": {
            "task": "iaai_scraper.worker.tasks.sync_listing_task",
            "schedule": settings.celery.beat_sync_interval_minutes * 60.0,
            "args": (),
            "kwargs": {"limit": settings.celery.beat_sync_limit},
            "options": {"queue": "scraping"},
        },
    },

    # Роутинг задач.
    task_routes={
        "iaai_scraper.worker.tasks.*": {"queue": "scraping"},
    },
)

# Автообнаружение задач.
celery_app.autodiscover_tasks(["iaai_scraper.worker"])