from rest_framework.views import APIView
from rest_framework.response import Response
from rest_framework import status, viewsets, filters
from rest_framework.authentication import TokenAuthentication
from rest_framework.authtoken.views import ObtainAuthToken
from rest_framework.settings import api_settings 
from rest_framework.permissions import IsAuthenticated

from profiles_api import serializers, models, permissions


class HelloApiView(APIView):
    """Test API View"""
    serializer_class = serializers.HelloSerializer

    def get(self, request, format=None):
        """Returns a list of APIView features"""
        an_apiview = [
            'Uses HTTP methods as function (get, post, patch, put, delete)',
            'Is similar to a traditional Django view',
            'Gives you the most control over the application logic',
            'Is mapped manually to URLs', 
        ]

        return Response({'message': 'Hello!', 'an_apiview': an_apiview})

    def post(self, request):
        """Create a hello message with our name"""
        serializer = self.serializer_class(data=request.data)

        if serializer.is_valid():
            name = serializer.validated_data.get('name')
            message = f'Hello {name}'
            return Response({'message': message})
        else:
            return Response(
                serializer.errors,
                status=status.HTTP_400_BAD_REQUEST
            )
    
    def put(self, request, pk=None):
        """Handle updating an object"""
        return Response({'method': 'PUT'})
    
    def patch(self, request, pk=None):
        """Handle a partial update of an object"""
        return Response({'method': 'PATCH'})

    def delete(self, request, pk=None):
        """Delete an object"""
        return Response({'method': 'DELETE'})


class HelloViewSet(viewsets.ViewSet):
    """Test API ViewSet"""
    serializer_class = serializers.HelloSerializer
    
    def list(self, request):
        """Return a hello message"""
        
        a_viewset = [
            'Uses actions (list, create, retrieve, update, partial_update)',
            'Automatically maps to URLs using Routers',
            'Provides more functionality with less code',
        ]
        
        return Response({'message': 'Hello!', 'a_viewset': a_viewset})
    
    def create(self, request):
        """Create a new hello message""" 
        serializer = self.serializer_class(data=request.data)

        if serializer.is_valid():
            name = serializer.validated_data.get('name')
            message = f'Hello {name}!'
            return Response({'message': message})
        else:
            return Response(
                serializer.errors,
                status=status.HTTP_400_BAD_REQUEST
            )

    def retrieve(self, request, pk=None):
        """Handle getting an object by its ID"""
        return Response({'http_method': 'GET'})

    def update(self, request, pk=None):
        """Handle updating an object"""
        return Response({'http_method': 'PUT'})
    
    def partial_update(self, request, pk=None):
        """Handle updating part of an object"""
        return Response({'http_method': 'PATCH'})

    def destroy(self, request, pk=None):
        """Handle removing an object"""
        return Response({'http_method': 'DELETE'})


class UserProfileViewSet(viewsets.ModelViewSet):
    """Handle creating and updating profiles"""
    serializer_class = serializers.UserProfileSerializer
    queryset = models.UserProfile.objects.all()
    authentication_classes = (TokenAuthentication,)
    permission_classes = (permissions.UpdateOwnProfile,)
    filter_backends = (filters.SearchFilter,)
    search_fields = ('name', 'email',)


class UserLoginApiView(ObtainAuthToken):
    """Handle creating user authentication tokens"""
    renderer_classes = api_settings.DEFAULT_RENDERER_CLASSES


class UserProfileFeedViewSet(viewsets.ModelViewSet):
    """Handles creating, reading and updating profile feed items"""
    serializer_class = serializers.ProfileFeedItemSerializer
    queryset = models.ProfileFeedItem.objects.all()
    authentication_classes = (TokenAuthentication,)
    permission_classes = (
        permissions.UpdateOwnStatus,
        IsAuthenticated
    )

    def perform_create(self, serializer):
        """Sets the user profile to the logged in user"""
        serializer.save(user_profile=self.request.user)


