#!/usr/bin/env python3
"""
RQ Queue Monitoring Utility

Displays information about RQ queues and their jobs.

Usage:
    python scripts/queue_info.py           # Show all queues
    python scripts/queue_info.py --failed  # Show failed jobs
    python scripts/queue_info.py --workers # Show active workers
"""

import argparse
import sys
import os

# Add parent directory to path for imports
sys.path.insert(0, os.path.dirname(os.path.dirname(os.path.abspath(__file__))))

from redis import Redis
from rq import Queue, Worker
from rq.job import Job
from rq.registry import FailedJobRegistry, StartedJobRegistry

from app.tasks import ALL_QUEUES, get_redis_connection, get_all_queues_info


def show_queue_info():
    """Display information about all queues."""
    print("\n" + "=" * 60)
    print("RQ Queue Status")
    print("=" * 60)

    for info in get_all_queues_info():
        print(f"\nQueue: {info['name']}")
        print(f"  Description: {info['description']}")
        print(f"  Jobs in queue: {info['count']}")
        print(f"  Default timeout: {info['default_timeout']}s")
        print(f"  Result TTL: {info['default_result_ttl']}s")


def show_failed_jobs():
    """Display failed jobs from all queues."""
    print("\n" + "=" * 60)
    print("Failed Jobs")
    print("=" * 60)

    conn = get_redis_connection()

    for queue_name in ALL_QUEUES:
        queue = Queue(queue_name, connection=conn)
        registry = FailedJobRegistry(queue=queue)
        job_ids = registry.get_job_ids()

        if job_ids:
            print(f"\nQueue: {queue_name} ({len(job_ids)} failed)")
            for job_id in job_ids[:10]:  # Show first 10
                job = Job.fetch(job_id, connection=conn)
                print(f"  - {job_id}")
                print(f"    Function: {job.func_name}")
                print(f"    Failed at: {job.ended_at}")
                if job.exc_info:
                    # Show first line of exception
                    exc_line = job.exc_info.split('\n')[-2] if job.exc_info else 'Unknown'
                    print(f"    Error: {exc_line[:80]}")
        else:
            print(f"\nQueue: {queue_name} (no failed jobs)")


def show_workers():
    """Display active workers."""
    print("\n" + "=" * 60)
    print("Active Workers")
    print("=" * 60)

    conn = get_redis_connection()
    workers = Worker.all(connection=conn)

    if not workers:
        print("\nNo active workers found.")
        return

    for worker in workers:
        print(f"\nWorker: {worker.name}")
        print(f"  State: {worker.get_state()}")
        print(f"  Queues: {', '.join(q.name for q in worker.queues)}")
        print(f"  PID: {worker.pid}")

        current_job = worker.get_current_job()
        if current_job:
            print(f"  Current job: {current_job.id}")
            print(f"    Function: {current_job.func_name}")


def show_started_jobs():
    """Display currently running jobs."""
    print("\n" + "=" * 60)
    print("Running Jobs")
    print("=" * 60)

    conn = get_redis_connection()

    for queue_name in ALL_QUEUES:
        queue = Queue(queue_name, connection=conn)
        registry = StartedJobRegistry(queue=queue)
        job_ids = registry.get_job_ids()

        if job_ids:
            print(f"\nQueue: {queue_name} ({len(job_ids)} running)")
            for job_id in job_ids:
                job = Job.fetch(job_id, connection=conn)
                print(f"  - {job_id}")
                print(f"    Function: {job.func_name}")
                print(f"    Started at: {job.started_at}")
        else:
            print(f"\nQueue: {queue_name} (no running jobs)")


def main():
    parser = argparse.ArgumentParser(description='RQ Queue Monitoring Utility')
    parser.add_argument('--failed', action='store_true', help='Show failed jobs')
    parser.add_argument('--workers', action='store_true', help='Show active workers')
    parser.add_argument('--running', action='store_true', help='Show running jobs')
    parser.add_argument('--all', action='store_true', help='Show all information')

    args = parser.parse_args()

    # Always show queue info
    show_queue_info()

    if args.all or args.workers:
        show_workers()

    if args.all or args.running:
        show_started_jobs()

    if args.all or args.failed:
        show_failed_jobs()

    print("\n" + "=" * 60)
    print("Done")
    print("=" * 60 + "\n")


if __name__ == '__main__':
    main()