from rest_framework.decorators import api_view
from rest_framework.response import Response
from rest_framework.reverse import reverse
from rest_framework import serializers
from rest_framework import generics
from core.models import *
from django.forms import widgets
from rest_framework import filters

"""
	Schema of the generator object:
		all: Set of all Model objects
		all_if(regex): Set of Model objects that match regex
	
	Model object:
		plural: English plural of object name
		camel: CamelCase version of object name
		refs: list of references to other Model objects
		props: list of properties minus refs

	TODO: Deal with subnets
"""

# Based on api_root.py

@api_view(['GET'])
def api_root(request, format=None):
    return Response({
		{% for object in generator.all %}'{{ object.plural }}': reverse('{{ object }}-list', request=request, format=format),
		{% endfor %}
    })

# Based on serializers.py

{% for object in generator.all %}

class {{ object.camel }}Serializer(serializers.HyperlinkedModelSerializer):
	id = serializers.Field()
	{% for ref in object.refs %}
	{% if ref.multi %}
	{{ ref.plural }} = serializers.HyperlinkedRelatedField(many=True, read_only=True, view_name='{{ ref }}-detail')
	{% else %}
	{{ ref }} = serializers.HyperlinkedRelatedField(read_only=True, view_name='{{ ref }}-detail')
	{% endif %}
	{% endfor %}
	class Meta:
		model = {{ object.camel }}
		fields = ({% for prop in object.props %}'{{ prop }}',{% endfor %}{% for ref in object.refs %}{%if ref.multi %}'{{ ref.plural }}'{% else %}'{{ ref }}'{% endif %},{% endfor %})

class {{ object.camel }}IdSerializer(serializers.ModelSerializer):
	id = serializers.Field()
	{% for ref in object.refs %}
	{% if ref.multi %}
	{{ ref.plural }} = serializers.HyperlinkedRelatedField(many=True, read_only=True, view_name='{{ ref }}-detail')
	{% else %}
	{{ ref }} = serializers.HyperlinkedRelatedField(read_only=True, view_name='{{ ref }}-detail')
	{% endif %}
	{% endfor %}
	class Meta:
		model = {{ object.camel }}
		fields = ({% for prop in object.props %}'{{ prop }}',{% endfor %}{% for ref in object.refs %}{%if ref.multi %}'{{ ref.plural }}'{% else %}'{{ ref }}'{% endif %},{% endfor %})


{% endfor %}

serializerLookUp = { 
{% for object in generator.all %}
                 {{ object.camel }}: {{ object.camel }}Serializer,
{% endfor %}
                 None: None,
                }

# Based on core/views/*.py
{% for object in generator.all %}

class {{ object.camel }}List(generics.ListCreateAPIView):
    queryset = {{ object.camel }}.objects.select_related().all()
    serializer_class = {{ object.camel }}Serializer
    id_serializer_class = {{ object.camel }}IdSerializer
    filter_backends = (filters.DjangoFilterBackend,)
    filter_fields = ({% for prop in object.props %}'{{ prop }}',{% endfor %}{% for ref in object.refs %}{%if ref.multi %}'{{ ref.plural }}'{% else %}'{{ ref }}'{% endif %},{% endfor %})

    def get_serializer_class(self):
        no_hyperlinks = self.request.QUERY_PARAMS.get('no_hyperlinks', False)
        if (no_hyperlinks):
            return self.id_serializer_class
        else:
            return self.serializer_class

    def get_queryset(self):
        return {{ object.camel }}.select_by_user(self.request.user)

    def create(self, request, *args, **kwargs):
        #obj = {{ object.camel }}().update(request.DATA)
        obj = self.get_object()
        obj.caller = request.user
        if obj.can_update(request.user):
            return super({{ object.camel }}List, self).create(request, *args, **kwargs)
        else:
            return Response(status=status.HTTP_400_BAD_REQUEST)

class {{ object.camel }}Detail(generics.RetrieveUpdateDestroyAPIView):
    queryset = {{ object.camel }}.objects.select_related().all()
    serializer_class = {{ object.camel }}Serializer
    id_serializer_class = {{ object.camel }}IdSerializer

    def get_serializer_class(self):
        no_hyperlinks = self.request.QUERY_PARAMS.get('no_hyperlinks', False)
        if (no_hyperlinks):
            return self.id_serializer_class
        else:
            return self.serializer_class
    
    def get_queryset(self):
        return {{ object.camel }}.select_by_user(self.request.user)

    def update(self, request, *args, **kwargs):
        obj = self.get_object()
        if obj.can_update(request.user):
            return super({{ object.camel }}Detail, self).update(request, *args, **kwargs)
        else:
            return Response(status=status.HTTP_400_BAD_REQUEST)

    def destroy(self, request, *args, **kwargs):
        obj = self.get_object()
        if obj.can_update(request.user):
            return super({{ object.camel }}Detail, self).destroy(request, *args, **kwargs)
        else:
            return Response(status=status.HTTP_400_BAD_REQUEST)
     

{% endfor %}