from datetime import datetime

from django.conf import settings
from django.shortcuts import get_object_or_404
from drf_yasg.utils import swagger_auto_schema
from drf_yasg import openapi
from pytz import timezone
from rest_framework import status
from rest_framework.generics import RetrieveUpdateAPIView, RetrieveUpdateDestroyAPIView, RetrieveAPIView, CreateAPIView, ListAPIView
from rest_framework.pagination import PageNumberPagination
from rest_framework.permissions import AllowAny, IsAuthenticated, IsAdminUser
from rest_framework.response import Response
from rest_framework.views import APIView

from core.permissions import IsAuthorOrReadOnly
from .models import CustomUser, RefreshToken
from .repositories import RefreshTokenRepository, ProfileRepository
from .serializers import RegistrationSerializer, LoginSerializer, CustomUserSerializer, ProfileSerializer
from .renderers import CustomUserJSONRenderer
from .token_generators import generate_rt, generate_jwt


# Create your views here.


class RefreshAPIView(APIView):
    """
    Refreshing old access token
    """
    permission_classes = (AllowAny,)

    @swagger_auto_schema(request_body=openapi.Schema(
        type=openapi.TYPE_OBJECT,
        properties={
            'refresh_token': openapi.Schema(type=openapi.TYPE_STRING, description='refresh_token'),
        },
        required=['refresh_token']
    ),
        responses={
            status.HTTP_200_OK: openapi.Schema(
                type=openapi.TYPE_OBJECT,
                properties={
                    'access_token': openapi.Schema(type=openapi.TYPE_STRING),
                    'refresh_token': openapi.Schema(type=openapi.TYPE_STRING)
                }
            ),
        }
    )
    def post(self, request):
        try:
            refresh_token = request.data.get('refresh_token')
            old_token = RefreshTokenRepository.get(token=refresh_token)
            user = old_token.user
        except RefreshToken.DoesNotExist:
            return Response({
                'error': 'Token is not valid'
            }, status=status.HTTP_400_BAD_REQUEST)
        if not old_token.used and old_token.expires > datetime.now(tz=timezone(settings.TIME_ZONE)):
            token = RefreshToken.objects.create(
                token=generate_rt(),
                user=user
            )
            old_token.delete()
            data = {
                'access_token': generate_jwt(user.pk),
                'refresh_token': token.token
            }
            return Response(data, status=status.HTTP_200_OK)
        else:
            return Response(
                data={
                    'error': 'Token expired',
                },
                status=status.HTTP_400_BAD_REQUEST
            )


class RegistrationAPIView(APIView):
    permission_classes = (AllowAny,)
    serializer_class = RegistrationSerializer
    renderer_classes = (CustomUserJSONRenderer,)

    @swagger_auto_schema(request_body=openapi.Schema(
        type=openapi.TYPE_OBJECT,
        properties={
            'email': openapi.Schema(type=openapi.TYPE_STRING, description='email'),
            'password': openapi.Schema(type=openapi.TYPE_STRING, description='user password')
        }
    ),
        responses={
            status.HTTP_200_OK: openapi.Schema(
                type=openapi.TYPE_OBJECT,
                properties={
                    'email': openapi.Schema(type=openapi.TYPE_STRING),
                    'access_token': openapi.Schema(type=openapi.TYPE_STRING),
                    'refresh_token': openapi.Schema(type=openapi.TYPE_STRING)
                }
            ),
        }
    )
    def post(self, request):
        user = request.data
        serializer = self.serializer_class(data=user)
        serializer.is_valid(raise_exception=True)
        serializer.save()
        return Response(serializer.data, status=status.HTTP_201_CREATED)


class LoginAPIView(APIView):
    permission_classes = (AllowAny,)
    serializer_class = LoginSerializer
    renderer_classes = (CustomUserJSONRenderer,)

    @swagger_auto_schema(request_body=openapi.Schema(
        type=openapi.TYPE_OBJECT,
        properties={
            'email': openapi.Schema(type=openapi.TYPE_STRING, description='email'),
            'password': openapi.Schema(type=openapi.TYPE_STRING, description='user password')
        },
    ),
        responses={
            status.HTTP_200_OK: openapi.Schema(
                type=openapi.TYPE_OBJECT,
                properties={
                    'email': openapi.Schema(type=openapi.TYPE_STRING),
                    'access_token': openapi.Schema(type=openapi.TYPE_STRING),
                    'refresh_token': openapi.Schema(type=openapi.TYPE_STRING)
                }
            ),
        }
    )
    def post(self, request):
        user = request.data

        serializer = self.serializer_class(data=user)
        serializer.is_valid(raise_exception=True)

        return Response(serializer.data, status=status.HTTP_200_OK)


class CustomUserRetrieveUpdateAPIView(RetrieveUpdateAPIView):
    permission_classes = (IsAuthenticated,)
    renderer_classes = (CustomUserJSONRenderer,)
    serializer_class = CustomUserSerializer

    def retrieve(self, request, *args, **kwargs):
        serializer = self.serializer_class(request.user)
        return Response(serializer.data, status=status.HTTP_200_OK)

    def update(self, request, *args, **kwargs):
        serializer_data = request.data
        serializer = self.serializer_class(
            request.user, data=serializer_data, partial=True
        )

        serializer.is_valid(raise_exception=True)
        serializer.save()

        return Response(serializer.data, status=status.HTTP_200_OK)


# class ChangePasswordAPIView(APIView):
#
#     permission_classes = (IsAuthenticated,)
#
#     @swagger_auto_schema(request_body=openapi.Schema(
#         type=openapi.TYPE_OBJECT,
#         properties={
#             'new_password': openapi.Schema(type=openapi.TYPE_STRING, description='refresh_token'),
#         },
#         required=['new_password']
#     ),
#         responses={
#             status.HTTP_200_OK: openapi.Schema(
#                 type=openapi.TYPE_OBJECT,
#                 properties={
#                     'message': 'password changed',
#                 }
#             ),
#             status.HTTP_401_UN
#         }
#     )
#     def post(self, request):
#         pass


class ProfileRetrieveUpdateDestroyAPIView(CreateAPIView, RetrieveUpdateDestroyAPIView):
    permission_classes = (IsAuthenticated,)
    serializer_class = ProfileSerializer
    queryset = ProfileRepository.all()

    def get_queryset(self):
        return self.queryset

    def get_object(self):
        queryset = self.get_queryset()
        obj = get_object_or_404(queryset, user=self.request.user)
        return obj

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

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


class ProfileRetrieveAPIView(RetrieveAPIView):
    permission_classes = (IsAuthorOrReadOnly,)
    serializer_class = ProfileSerializer
    queryset = ProfileRepository.all()


class ProfileListAPIView(ListAPIView):
    queryset = ProfileRepository.all()
    serializer_class = ProfileSerializer
    permission_classes = [IsAdminUser]
    pagination_class = PageNumberPagination