from rest_framework.viewsets import ModelViewSet
from rest_framework.permissions import IsAuthenticated
from rest_framework.filters import SearchFilter, OrderingFilter
from django_filters.rest_framework import DjangoFilterBackend

class BaseModelViewSet(ModelViewSet):
    """
    CMS-like Base ViewSet
    - CRUD อัตโนมัติ
    - Pagination (จาก settings.py)
    - Filter / Search / Ordering
    - Permission กลาง
    """

    # default permission (override ได้)
    permission_classes = [IsAuthenticated]

    # filter backend มาตรฐานแบบ CMS
    filter_backends = [
        DjangoFilterBackend,
        SearchFilter,
        OrderingFilter,
    ]

    # ค่า default (override ต่อ model)
    filterset_fields = "__all__"
    search_fields = []
    ordering_fields = "__all__"
    ordering = ["-id"]