"""
Celery configuration for ThrillWiki.

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

Celery uses the same Django settings module as the main application,
which can be configured via DJANGO_SETTINGS_MODULE environment variable.
"""

import os
from celery import Celery
from decouple import config

# Use the same Django settings module as the main application
# Default to production (matching WSGI/ASGI), can be overridden via environment
# Honor existing DJANGO_SETTINGS_MODULE if already set
if "DJANGO_SETTINGS_MODULE" not in os.environ:
    os.environ["DJANGO_SETTINGS_MODULE"] = "config.django.production"

app = Celery("thrillwiki")

# Get Redis URL from environment variable with fallback
REDIS_URL = config("REDIS_URL", default="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
        },
        "rides-daily-closing-check": {
            "task": "rides.check_overdue_closings",
            "schedule": 86400.0,  # Daily at midnight
        },
    },
    # 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}")