import logging
from celery import shared_task
from .services import generate_questions

logger = logging.getLogger(__name__)


@shared_task(bind=True, max_retries=3, default_retry_delay=60)
def generate_questions_task(self, sid):
    """
    Celery task to generate questions asynchronously.
    
    Args:
        sid: StudyKit SID
        
    Returns:
        dict with status and message
    """
    try:
        logger.info(f"🚀 Starting question generation for StudyKit {sid}")
        
        success, error_message = generate_questions(sid)
        
        if success:
            logger.info(f"✅ Question generation completed for StudyKit {sid}")
            return {
                'status': 'success',
                'sid': sid,
                'message': 'Questions generated successfully'
            }
        else:
            logger.error(f"❌ Question generation failed for StudyKit {sid}: {error_message}")
            # Retry on failure
            raise self.retry(exc=Exception(error_message))
            
    except Exception as e:
        logger.exception(f"💥 Fatal error in question generation task for {sid}")
        
        # Retry up to max_retries times
        if self.request.retries < self.max_retries:
            raise self.retry(exc=e)
        
        return {
            'status': 'failed',
            'sid': sid,
            'message': str(e)
        }