import logging
from rest_framework import viewsets, permissions
from rest_framework.exceptions import ValidationError
from .models import Client
from .serializers import ClientSerializer
from .services import ClientService

logger = logging.getLogger(__name__)


class ClientViewSet(viewsets.ModelViewSet):
    queryset = Client.objects.filter(is_active=True)
    serializer_class = ClientSerializer
    permission_classes = [permissions.IsAuthenticated]

    def perform_create(self, serializer):
        try:
            instance = serializer.save()
            serializer.instance = instance
        except ValidationError as e:
            logger.warning(f"Validation error creating client by {self.request.user}: {e}")
            raise e
        except Exception as e:
            logger.error(f"Unexpected error creating client: {e}", exc_info=True)
            raise ValidationError({"detail": "Došlo je do greške pri stvaranju klijenta."})

    def perform_update(self, serializer):
        try:
            instance = serializer.save()
            serializer.instance = instance
        except ValidationError as e:
            logger.warning(f"Validation error updating client by {self.request.user}: {e}")
            raise e
        except Exception as e:
            logger.error(f"Unexpected error updating client: {e}", exc_info=True)
            raise ValidationError({"detail": "Došlo je do greške pri ažuriranju klijenta."})

    def perform_destroy(self, instance):
        # Delegate deletion (soft-delete) to service layer
        ClientService.delete_client(instance, user=self.request.user)
        logger.info(f"Client {instance.id} soft-deleted by {self.request.user}")