"""
Celery configuration for ThrillWiki.

This module sets up Celery for background task processing including:
- Trending calculations
- Cache warming
- Analytics processing
- Email notifications
"""

import os
from celery import Celery

# Set the default Django settings module for the 'celery' program.
os.environ.setdefault('DJANGO_SETTINGS_MODULE', 'config.django.local')

app = Celery('thrillwiki')

# Get Redis URL from environment variable with fallback
REDIS_URL = os.environ.get('REDIS_URL', 'redis://localhost:6379/1')

# Celery Configuration - set directly without loading from Django settings first
app.conf.update(
    # Broker settings
    broker_url=REDIS_URL,
    result_backend=REDIS_URL,

    # Task settings
    task_serializer='json',
    accept_content=['json'],
    result_serializer='json',
    timezone='America/New_York',
    enable_utc=True,

    # Worker settings
    worker_prefetch_multiplier=1,
    task_acks_late=True,
    worker_max_tasks_per_child=1000,

    # Task routing
    task_routes={
        'apps.core.tasks.trending.*': {'queue': 'trending'},
        'apps.core.tasks.analytics.*': {'queue': 'analytics'},
        'apps.core.tasks.cache.*': {'queue': 'cache'},
    },

    # Beat schedule for periodic tasks
    beat_schedule={
        'calculate-trending-content': {
            'task': 'apps.core.tasks.trending.calculate_trending_content',
            'schedule': 300.0,  # Every 5 minutes
        },
        'warm-trending-cache': {
            'task': 'apps.core.tasks.trending.warm_trending_cache',
            'schedule': 900.0,  # Every 15 minutes
        },
        'cleanup-old-analytics': {
            'task': 'apps.core.tasks.analytics.cleanup_old_analytics',
            'schedule': 86400.0,  # Daily
        },
    },

    # Task result settings
    result_expires=3600,  # 1 hour
    task_ignore_result=False,

    # Error handling
    task_reject_on_worker_lost=True,
    task_soft_time_limit=300,  # 5 minutes
    task_time_limit=600,  # 10 minutes
)

# Load task modules from all registered Django apps.
app.autodiscover_tasks()


@app.task(bind=True)
def debug_task(self):
    """Debug task for testing Celery setup."""
    print(f'Request: {self.request!r}')