# yourapp/tasks.py
from celery import shared_task
from channels.layers import get_channel_layer
from asgiref.sync import async_to_sync
import redis
import json
import logging
import re
from core.utils import redis_client
from apps.proxy.ts_proxy.channel_status import ChannelStatus

logger = logging.getLogger(__name__)

# Store the last known value to compare with new data
last_known_data = {}

@shared_task
def fetch_channel_stats():
    try:
        # Basic info for all channels
        channel_pattern = "ts_proxy:channel:*:metadata"
        all_channels = []

        # Extract channel IDs from keys
        cursor = 0
        while True:
            cursor, keys = redis_client.scan(cursor, match=channel_pattern)
            for key in keys:
                channel_id_match = re.search(r"ts_proxy:channel:(.*):metadata", key.decode('utf-8'))
                if channel_id_match:
                    ch_id = channel_id_match.group(1)
                    channel_info = ChannelStatus.get_basic_channel_info(ch_id)
                    if channel_info:
                        all_channels.append(channel_info)

            if cursor == 0:
                break

    except Exception as e:
        logger.error(f"Error in channel_status: {e}", exc_info=True)
        return
        # return JsonResponse({'error': str(e)}, status=500)

    channel_layer = get_channel_layer()
    async_to_sync(channel_layer.group_send)(
        "updates",
        {
            "type": "update",
            "data": {"success": True, "type": "channel_stats", "stats": json.dumps({'channels': all_channels, 'count': len(all_channels)})}
        },
    )