"""
Queue Manager - Manages Celery tasks for async operations
"""
import logging
from typing import Dict, Any, Optional
from django.conf import settings

logger = logging.getLogger(__name__)

# TODO: When Celery is set up, import and use actual task decorators
# from celery import shared_task

class QueueManager:
    """
    Queue manager for async task execution.
    Provides abstraction over Celery/django-q for task queuing.
    """
    
    def __init__(self):
        self.queue_enabled = getattr(settings, 'CELERY_ENABLED', False)
    
    def enqueue_task(
        self,
        task_name: str,
        args: tuple = (),
        kwargs: Dict[str, Any] = None,
        account_id: Optional[int] = None,
        priority: int = 5,
        delay_seconds: int = 0
    ) -> str:
        """
        Enqueue a task for async execution.
        
        Args:
            task_name: Name of the task function
            args: Positional arguments
            kwargs: Keyword arguments
            account_id: Account ID for account-specific queues
            priority: Task priority (1-10, higher = more priority)
            delay_seconds: Delay before execution (seconds)
        
        Returns:
            Task ID
        """
        if not self.queue_enabled:
            logger.warning(f"Queue not enabled, task {task_name} would be queued")
            return "no-queue"
        
        # TODO: Implement actual Celery task enqueueing
        # Example: task.delay(*args, **kwargs)
        logger.info(f"Enqueueing task {task_name} for account {account_id}")
        
        return "task-id-placeholder"
    
    def get_task_status(self, task_id: str) -> Dict[str, Any]:
        """
        Get status of a queued task.
        
        Args:
            task_id: Task ID returned from enqueue_task
        
        Returns:
            Dict with 'status', 'result', 'error'
        """
        # TODO: Implement task status checking
        return {
            'status': 'PENDING',
            'result': None,
            'error': None,
        }
    
    def cancel_task(self, task_id: str) -> bool:
        """
        Cancel a queued or running task.
        
        Args:
            task_id: Task ID to cancel
        
        Returns:
            True if cancelled, False otherwise
        """
        # TODO: Implement task cancellation
        logger.info(f"Cancelling task {task_id}")
        return False


# Singleton instance
queue_manager = QueueManager()