from django.shortcuts import render
from rest_framework.views import APIView
from rest_framework.response import Response

from rest_framework import viewsets, permissions, pagination, filters
from django.http import JsonResponse

from .models import Tag, Product, ProductOnBill, Receipt, Shop, ShopTag
from .serializers import TagSerializer, ProductSerializer, ProductOnBillSerializer, ReceiptSerializer, ShopSerializer, ShopTagSerializer

from .statistics import get_general_stats, get_shops_stats, get_products_stats


class TagViewSet(viewsets.ModelViewSet):
    queryset = Tag.objects.all()
    # permission_classes = [permissions.AllowAny]
    serializer_class = TagSerializer
    def get_queryset(self):
        return self.request.user.tags.all()

    def perform_create(self, serializer):
        serializer.save(owner=self.request.user)


class ShopTagViewSet(viewsets.ModelViewSet):
    queryset = ShopTag.objects.all()
    # permission_classes = [permissions.AllowAny]
    serializer_class = ShopTagSerializer

    def get_queryset(self):
        return self.request.user.shop_tags.all()

    def perform_create(self, serializer):
        serializer.save(owner=self.request.user)


class ShopViewSet(viewsets.ModelViewSet):
    queryset = Shop.objects.all()
    # permission_classes = [permissions.AllowAny]
    serializer_class = ShopSerializer

    def get_queryset(self):
        return self.request.user.shops.all()

    def perform_create(self, serializer):
        serializer.save(owner=self.request.user)


class ProductViewSet(viewsets.ModelViewSet):
    queryset = Product.objects.all()
    # permission_classes = [permissions.AllowAny]
    serializer_class = ProductSerializer
    def get_queryset(self):
        return self.request.user.products.all()

    def perform_create(self, serializer):
        serializer.save(owner=self.request.user)


class ProductOnBillViewSet(viewsets.ModelViewSet):
    queryset = ProductOnBill.objects.all()
    # permission_classes = [permissions.AllowAny]
    serializer_class = ProductOnBillSerializer
    def get_queryset(self):
        return self.request.user.products_on_bills.all()

    def perform_create(self, serializer):
        serializer.save(owner=self.request.user)


class StandardResultsSetPagination(pagination.PageNumberPagination):
    page_size = 10
    page_size_query_param = 'page_size'


class ReceiptViewSet(viewsets.ModelViewSet):
    queryset = Receipt.objects.all()
    serializer_class = ReceiptSerializer
    pagination_class = StandardResultsSetPagination
    filter_backends = [filters.OrderingFilter]
    ordering = ['-date']

    def get_queryset(self):
        return self.request.user.receipts.all()

    def perform_create(self, serializer):
        serializer.save(owner=self.request.user)


# === STATS VIEWS ===

# def GeneralStats(APIView):
#     # authentication_classes = [authentication.TokenAuthentication]
#     # permission_classes = [permissions.IsAdminUser]

#     def get(self, request, format=None):
#         print(request.user)
#         return Response(get_general_stats(request.user))



# # def shops_stats_view(request):
# #     responseData = get_shops_stats(request.user)
# #     return JsonResponse(responseData, safe=False)


# # def products_stats_view(request):
# #     responseData = get_products_stats(request.user)
# #     return JsonResponse(responseData, safe=False)