#!/usr/bin/env python3
"""
Queue consumer for processing file tasks.
"""

import sys
import os
import time
import signal
import argparse
from pathlib import Path

# Add project root directory to Python path
project_root = Path(__file__).parent.parent
sys.path.insert(0, str(project_root))

from task_queue.config import huey
from task_queue.manager import queue_manager
from task_queue.integration_tasks import process_files_async, cleanup_project_async
from huey.consumer import Consumer


class QueueConsumer:
    """Queue consumer for processing async tasks."""

    def __init__(self, worker_type: str = "threads", workers: int = 2):
        self.huey = huey
        self.worker_type = worker_type
        self.workers = workers
        self.running = False
        self.consumer = None

        # Register signal handlers
        signal.signal(signal.SIGINT, self._signal_handler)
        signal.signal(signal.SIGTERM, self._signal_handler)

    def _signal_handler(self, signum, frame):
        """Signal handler for graceful shutdown."""
        print(f"\nReceived signal {signum}, shutting down queue consumer...")
        self.running = False

    def start(self):
        """Start the queue consumer."""
        print(f"Starting queue consumer...")
        print(f"Worker threads: {self.workers}")
        print(f"Worker type: {self.worker_type}")
        print(f"Database: {os.path.join(os.path.dirname(__file__), '..', 'projects', 'queue_data', 'huey.db')}")
        print("Press Ctrl+C to stop the consumer")

        self.running = True

        try:
            # Create Huey consumer
            self.consumer = Consumer(self.huey, workers=self.workers, worker_type=self.worker_type.rstrip('s'))

            # Display queue statistics
            stats = queue_manager.get_queue_stats()
            print(f"Current queue status: {stats}")

            # Start consumer run loop
            print("Consumer starting task processing...")
            self.consumer.run()

        except KeyboardInterrupt:
            print("\nReceived interrupt signal, shutting down...")
        except Exception as e:
            print(f"Queue consumer runtime error: {str(e)}")
        finally:
            self.stop()

    def stop(self):
        """Stop the queue consumer."""
        print("Stopping queue consumer...")
        try:
            if self.consumer:
                # Stop the consumer
                self.consumer.stop()
                self.consumer = None
            print("Queue consumer stopped")
        except Exception as e:
            print(f"Error stopping queue consumer: {str(e)}")

    def process_scheduled_tasks(self):
        """Process scheduled tasks."""
        print("Processing scheduled tasks...")
        # Additional scheduled task processing logic can be added here


def main():
    """Main entry point."""
    parser = argparse.ArgumentParser(description="File processing queue consumer")
    parser.add_argument(
        "--workers",
        type=int,
        default=2,
        help="Number of worker threads (default: 2)"
    )
    parser.add_argument(
        "--worker-type",
        choices=["threads", "greenlets", "processes"],
        default="threads",
        help="Worker thread type (default: threads)"
    )
    parser.add_argument(
        "--stats",
        action="store_true",
        help="Display queue statistics and exit"
    )
    parser.add_argument(
        "--flush",
        action="store_true",
        help="Flush the queue and exit"
    )
    parser.add_argument(
        "--check",
        action="store_true",
        help="Check queue status and exit"
    )

    args = parser.parse_args()

    # Initialize consumer
    consumer = QueueConsumer(
        worker_type=args.worker_type,
        workers=args.workers
    )

    # Handle different command-line options
    if args.stats:
        print("=== Queue Statistics ===")
        stats = queue_manager.get_queue_stats()
        print(f"Total tasks: {stats.get('total_tasks', 0)}")
        print(f"Pending tasks: {stats.get('pending_tasks', 0)}")
        print(f"Running tasks: {stats.get('running_tasks', 0)}")
        print(f"Completed tasks: {stats.get('completed_tasks', 0)}")
        print(f"Error tasks: {stats.get('error_tasks', 0)}")
        print(f"Scheduled tasks: {stats.get('scheduled_tasks', 0)}")
        print(f"Database: {stats.get('queue_database', 'N/A')}")
        return

    if args.flush:
        print("=== Flushing Queue ===")
        try:
            # Flush all tasks
            consumer.huey.flush()
            print("Queue flushed")
        except Exception as e:
            print(f"Failed to flush queue: {str(e)}")
        return

    if args.check:
        print("=== Checking Queue Status ===")
        stats = queue_manager.get_queue_stats()
        print(f"Queue status: OK" if "error" not in stats else f"Queue status: ERROR - {stats['error']}")

        pending_tasks = queue_manager.list_pending_tasks(limit=10)
        if pending_tasks:
            print(f"\nPending tasks (showing up to 10):")
            for task in pending_tasks:
                print(f"  Task ID: {task['task_id']}, Status: {task['status']}, Created: {task['created_time']}")
        else:
            print("No pending tasks")
        return

    # Start consumer
    print("=== Starting File Processing Queue Consumer ===")
    consumer.start()


if __name__ == "__main__":
    main()