from django.shortcuts import render
from .execptions import DiscountNotAvailableError
from rest_framework.views import APIView, Response
from django.shortcuts import get_object_or_404
from product.models import ProductVariant
from rest_framework.permissions import IsAuthenticated
from .serializers import OrderItemSerailzier, OrderModelSerializer
# from cart.models import 
from rest_framework import status
from .models import OrderItemModel, OrderModel
try:
    pass
except DiscountNotAvailableError:
    pass

"""

add post
remove delete
show get 

pay
"""



class CartItemViews(APIView):
    permission_classes = [IsAuthenticated]
    serializer_class = OrderItemSerailzier
    def post(self, request, pk):
        product_variant = get_object_or_404(ProductVariant, pk=pk)
        response = 'محصول با موفقیت به سبد خرید اضافه شد'
        quantity = request.data.get('quantity', 1)
        if product_variant.in_stock < quantity:
            quantity = product_variant.in_stock
            response = 'تعداد درخواستی بیشتر از موجودی محصول میباشد'

        cart_order, created = OrderModel.objects.get_or_create(user=request.user, status='CART')
        order_item, created = OrderItemModel.objects.get_or_create(order=cart_order, product=product_variant, defaults={'quantity': quantity})

        if not created and order_item.quantity:  
            order_item.quantity = quantity
            order_item.save()
        if not order_item.quantity:
            order_item.delete()
        return Response({'detail': response, 'count': quantity}, status=status.HTTP_202_ACCEPTED)
    
    
    def delete(self, request, pk):
        product_variant = get_object_or_404(ProductVariant, pk=pk)

        cart_order, created = OrderModel.objects.get_or_create(
            user=request.user,
            status='CART'
        )
        # order_item, created = OrderItemModel.objects.get_or_create(
        #     order=cart_order,
        #     product=product_variant,
        #     defaults={'quantity': request.data.get('quantity', 1)}
        # )
        order_item = get_object_or_404(OrderItemModel, order=cart_order, product=product_variant)
        order_item.delete()
        return Response({'detail': f'محصول {product_variant.product.name} از سبد خرید پاک شد'}, status=status.HTTP_204_NO_CONTENT)



class CartView(APIView):
    permission_classes = [IsAuthenticated]
    serializer_class = OrderModelSerializer
    def get(self, request):
        user = request.user
        cart_instance, created = OrderModel.objects.get_or_create(user=user, status='CART')
        cart_ser = self.serializer_class(instance=cart_instance, context={'request': request})
        return Response(cart_ser.data, status=status.HTTP_200_OK)