from django.http import Http404
from django.contrib.auth.decorators import login_required
from rest_framework.views import APIView  
from rest_framework.response import Response  
from rest_framework import status

from restful.models import File  
from restful.serializers import FileSerializer  

class FileList(APIView):
    """
    List all file, or create a new snippet.
    """

    def get(self, request, format=None):
        file = File.objects.all()
        serializer = FileSerializer(file, many=True)
        return Response(serializer.data)

    def post(self, request, format=None):
        serializer = FileSerializer(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 FileDetail(APIView):
    """
    Retrieve, update or delete a file instance.
    """
    def get_object(self, pk):
        try:
            return File.objects.get(pk=pk)
        except File.DoesNotExist:
            raise Http404

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

    def put(self, request, pk, format=None):
        file = self.get_object(pk)
        serializer = FileSerializer(file, 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):
        file = self.get_object(pk)
        file.delete()
        return Response(status=status.HTTP_204_NO_CONTENT)