from django.shortcuts import render
from django.contrib.auth import get_user_model
from django.contrib.auth.models import Group

from rest_framework import viewsets, permissions, generics
from .serializers import UserSerializer, GroupSerializer
from rest_framework.views import APIView
from rest_framework.response import Response


class CreditCardViewSet(viewsets.ModelViewSet):

    """
    API endpoint that allows credit cards to be listed
    """
    queryset = get_user_model().objects.all().order_by('-date_joined')
    serializer_class = UserSerializer

    permission_classes = [permissions.IsAuthenticated]


class UserViewSet(viewsets.ModelViewSet):

    """
    API endpoint that allows users to be viewed or edited.
    """
    queryset = get_user_model().objects.all().order_by('-date_joined')
    serializer_class = UserSerializer

    permission_classes = [permissions.IsAuthenticated]

class GroupViewSet(viewsets.ModelViewSet):
    """
    API endpoint that allows groups to be viewed or edited.
    """
    queryset = Group.objects.all()
    serializer_class = GroupSerializer

    permission_classes = [permissions.IsAuthenticated]

class GroupViewSet(viewsets.ModelViewSet):
    """
    API endpoint that allows groups to be viewed or edited.
    """
    queryset = Group.objects.all()
    serializer_class = GroupSerializer

    permission_classes = [permissions.IsAuthenticated]


# POST /vm/snapshot/ vmuuid=... => create snapshot, returns snapshot uuid
# GET /vm/snapshot => list
# DEL /vm/snapshot/<uuid:uuid> => delete
# create-list -> get, post => ListCreateAPIView
# del on other!
class VMSnapshotView(generics.ListCreateAPIView):
    #lookup_field = 'uuid'
    permission_classes = [permissions.IsAuthenticated]

import inspect
import sys
import re

# Next: create /order/<productname> urls
# Next: strip off "Product" at the end
class ProductsView(APIView):
    def get(self, request, format=None):
        clsmembers = inspect.getmembers(sys.modules['uncloud_api.models'], inspect.isclass)
        products = []
        for name, c in clsmembers:
            # Include everything that ends in Product, but not Product itself
            m = re.match(r'(?P<pname>.+)Product$', name)
            if m:
                products.append({
                    'name': m.group('pname'),
                    'description': c.description,
                    'recurring_period': c.recurring_period,
                    'pricing_model': c.pricing_model()
                }
                )


        return Response(products)