from asgiref.sync import async_to_sync
from channels.layers import get_channel_layer
from django.conf import settings
from django.db.models.signals import post_save
from django.dispatch import receiver

from core.apps.chat.models import ChatmessageModel, ChatroomModel


# @receiver(post_save, sender=ChatmessageModel)
# def broadcast_new_message(sender, instance, created, **kwargs):
#     """Yangi xabar saqlanganda xonadagi barcha WS ulanishlariga yuboradi."""
#     if not created:
#         return

#     channel_layer = get_channel_layer()
#     if channel_layer is None:
#         return

#     sender_obj = instance.sender
#     if sender_obj:
#         full_name = sender_obj.get_full_name().strip() or str(sender_obj.phone)
#         sender_data = {
#             "id": sender_obj.id,
#             "full_name": full_name,
#             "role": sender_obj.role,
#         }
#     else:
#         sender_data = None

#     site_url = getattr(settings, "SITE_URL", "").rstrip("/")
#     file_url = (site_url + instance.file.url) if instance.file else None

#     async_to_sync(channel_layer.group_send)(
#         f"chat_room_{instance.room_id}",
#         {
#             "type": "chat_message",
#             "id": instance.id,
#             "message_type": instance.message_type,
#             "text": instance.text,
#             "file_url": file_url,
#             "sender": sender_data,
#             "created_at": instance.created_at.isoformat(),
#         },
#     )


@receiver(post_save, sender="evaluation.AutoEvaluationModel")
def auto_create_chatroom(sender, instance, created, **kwargs):
    """AutoEvaluation yaratilganda avtomatik chat xonasi ochiladi."""
    if created:
        ChatroomModel.objects.get_or_create(
            auto_evaluation=instance,
            defaults={"type": "auto_evaluation"},
        )