from django.shortcuts import render
from mongoengine.django.auth import User
from rest_framework import routers, serializers, viewsets
from .serializers import *

# Create your views here.
from rest_framework.views import APIView
from rest_framework.response import Response
from rest_framework import authentication, permissions
from rest_framework import generics
from .serializers import UserSerializer
import json
from django.http import Http404, HttpResponse
from bson.json_util import dumps
from django.http import Http404
from rest_framework.views import APIView
from rest_framework.response import Response
from rest_framework import status



class ListUsers(APIView):
    """
    View to list all users in the system.

    * Requires token authentication.
    * Only admin users are able to access this view.
    """

    def get(self, request, format=None):
        """
        Return a list of all users.
        """
       
        serializer = UserSerializer(User.objects,many=True)
        return Response(serializer.data)

    def post(self, request, format=None):
        serializer = UserSerializer(data=request.data)
        if serializer.is_valid():
            serializer.save()
            return Response(serializer.data, status=status.HTTP_201_CREATED)
        return Response(serializer.errors, status=status.HTTP_400_BAD_REQUEST)

class ListUsersDetail(APIView):
    """
    Retrieve, update or delete a snippet instance.
    """
    def get_object(self, pk):
        try:
            return User.objects.get(pk=pk)
        except User.DoesNotExist:
            raise Http404

    def get(self, request, pk, format=None):
        user = self.get_object(pk)
        serializer = UserSerializer(user)
        return Response(serializer.data)

    def put(self, request, pk, format=None):
        user = self.get_object(pk)
        serializer = UserSerializer(user, data=request.data)
        if serializer.is_valid():
            serializer.save()
            return Response(serializer.data)
        return Response(serializer.errors, status=status.HTTP_400_BAD_REQUEST)

    def delete(self, request, pk, format=None):
        user = self.get_object(pk)
        user.delete()
        return Response(status=status.HTTP_204_NO_CONTENT)












