from django.db import transaction
from pyrogram import Error

from .client import get_client
from .models import Chat, AggregationSource
from .tasks import collect_new_messages


def aggregation_source_deleted(sender, instance: AggregationSource, **kwargs):
    if not AggregationSource.objects.filter(chat_id=instance.chat_id):
        Chat.objects.filter(chat_id=instance.chat_id).delete()


def chat_created(sender, instance: Chat, created, **kwargs):
    if created:
        transaction.on_commit(lambda: collect_new_messages.delay(instance.pk))


def chat_deleted(sender, instance: Chat, **kwargs):
    with get_client() as client:
        try:
            client.leave_chat(instance.chat_id)
        except Error:
            pass