from django.shortcuts import render
from django.contrib.auth.models import User, Group
from caremyway.api.models import UserInfo, Client, Provider, WorkType, Manage, Price, Shift
from rest_framework import viewsets, permissions, status
from rest_framework.decorators import api_view
from rest_framework.response import Response
from rest_framework.views import APIView
from caremyway.api.serializers import UserSerializer, UserInfoSerializer, ClientSerializer, ProviderSerializer, WorkTypeSerializer, EmployeeSerializer, EmployerSerializer, PriceSerializer, CShiftSerializer, PShiftSerializer

class UserViewSet(viewsets.ModelViewSet):
    lookup_field = 'username'
    serializer_class = UserSerializer

    # Disallow POSTing from /users/ route. Only rest-auth can add users.
    http_method_names = ['get', 'head', 'put', 'options']

    def get_queryset(self):
        return User.objects.filter(username=self.request.user)

class UserInfoViewSet(viewsets.ModelViewSet):
    lookup_field = "user__username"
    serializer_class = UserInfoSerializer

    # Disallow DELETE
    http_method_names = ['get', 'post', 'head', 'put', 'options']

    def get_queryset(self):
        return UserInfo.objects.filter(user__username=self.request.user)

class ClientViewSet(viewsets.ModelViewSet):
    lookup_field = "user__username"
    serializer_class = ClientSerializer

    # Disallow DELETE
    http_method_names = ['get', 'post', 'head', 'put', 'options']

    def get_queryset(self):
        return Client.objects.filter(user__username=self.request.user)

class ProviderViewSet(viewsets.ModelViewSet):
    lookup_field = "user__username"
    serializer_class = ProviderSerializer

    # Disallow DELETE
    http_method_names = ['get', 'post', 'head', 'put', 'options']

    def get_queryset(self):
        return Provider.objects.filter(user__username=self.request.user)

class WorkTypeViewSet(viewsets.ModelViewSet):
    serializer_class = WorkTypeSerializer

    def get_queryset(self):
        return WorkType.objects.filter(client__user__username=self.request.user)

    def destroy(self, request, *args, **kwargs):
        instance = self.get_object()
        instance.deleted = True
        instance.save()
        return Response(status=status.HTTP_204_NO_CONTENT)

class EmployeeViewSet(viewsets.ModelViewSet):
    serializer_class = EmployeeSerializer

    def get_queryset(self):
        return Manage.objects.filter(client__user__username=self.request.user)

    def destroy(self, request, *args, **kwargs):
        instance = self.get_object()
        instance.deleted = True
        instance.save()
        return Response(status=status.HTTP_204_NO_CONTENT)

class EmployerViewSet(viewsets.ModelViewSet):
    serializer_class = EmployerSerializer

    # Disallow creation and deletions of relationships
    http_method_names = ['get', 'head', 'put', 'options']

    def get_queryset(self):
        return Manage.objects.filter(provider__user__username=self.request.user)

class PriceViewSet(viewsets.ModelViewSet):
    serializer_class = PriceSerializer

    def get_queryset(self):
        return Price.objects.filter(management__client__user__username=self.request.user)

    def destroy(self, request, *args, **kwargs):
        instance = self.get_object()
        instance.deleted = True
        instance.save()
        return Response(status=status.HTTP_204_NO_CONTENT)

class CShiftViewSet(viewsets.ModelViewSet):
    serializer_class = CShiftSerializer

    def get_queryset(self):
        return Shift.objects.filter(price__management__client__user__username=self.request.user) \
                            .filter(deleted=False) \
                            .order_by('-set_start')

    def destroy(self, request, *args, **kwargs):
        instance = self.get_object()

        if instance.actual_start:
            return Response("Shift already started.", status=status.HTTP_400_BAD_REQUEST)

        instance.deleted = True
        instance.save()
        return Response(status=status.HTTP_204_NO_CONTENT)

class PShiftViewSet(viewsets.ModelViewSet):
    serializer_class = PShiftSerializer

    # Disallow creation and deletions of relationships
    http_method_names = ['get', 'head', 'put', 'options']

    def get_queryset(self):
        return Shift.objects.filter(price__management__provider__user__username=self.request.user) \
                            .filter(deleted=False) \
                            .order_by('-set_start')

@api_view()
def null_view(request):
    return Response(status=status.HTTP_400_BAD_REQUEST)