from rest_framework.views import APIView
from rest_framework.response import Response
from rest_framework import status
from django.conf import settings
from .authentication import ServiceBrokerAuthentication
from .serializers import (
    CatalogSerializer,
    ProvisionRequestSerializer,
    ProvisionResponseSerializer,
    BindingRequestSerializer,
    BindingResponseSerializer,
)
from services.models import Service


class ServiceBrokerView(APIView):
    authentication_classes = [ServiceBrokerAuthentication]

    def get_broker_version(self, request):
        return request.META.get("HTTP_X_BROKER_API_VERSION", "2.14")


class CatalogView(ServiceBrokerView):
    def get(self, request):
        services = []
        marketplace_services = Service.objects.all().prefetch_related(
            "cloud_provider", "categories"
        )

        for service in marketplace_services:
            plans = []

            service_data = {
                "id": f"service-{service.id}",
                "name": service.name,
                "description": service.description,
                "bindable": True,
                "plans": plans,
                "metadata": {
                    "displayName": service.name,
                    "provider": service.cloud_provider.name,
                    "imageUrl": service.logo.url if service.logo else None,
                    "categories": [cat.name for cat in service.categories.all()],
                },
                "tags": [cat.name for cat in service.categories.all()],
            }
            services.append(service_data)

        catalog = {"services": services}
        serializer = CatalogSerializer(data=catalog)
        serializer.is_valid(raise_exception=True)
        return Response(serializer.data)


class ProvisioningView(ServiceBrokerView):
    def put(self, request, instance_id):
        serializer = ProvisionRequestSerializer(data=request.data)
        serializer.is_valid(raise_exception=True)

        service_id = serializer.validated_data["service_id"]
        marketplace_service_id = service_id.replace("service-", "")
        service = Service.objects.get(id=marketplace_service_id)

        response_data = {
            "dashboard_url": f"{settings.BASE_URL}/service/{service.slug}/",
            "operation": None,
        }

        response_serializer = ProvisionResponseSerializer(data=response_data)
        response_serializer.is_valid(raise_exception=True)
        return Response(response_serializer.data, status=status.HTTP_201_CREATED)

    def delete(self, request, instance_id):
        return Response(status=status.HTTP_200_OK)


class BindingView(ServiceBrokerView):
    def put(self, request, instance_id, binding_id):
        serializer = BindingRequestSerializer(data=request.data)
        serializer.is_valid(raise_exception=True)

        service_id = serializer.validated_data["service_id"]
        marketplace_service_id = service_id.replace("service-", "")
        service = Service.objects.get(id=marketplace_service_id)

        credentials = {
            "service_name": service.name,
            "provider": service.cloud_provider.name,
            "service_url": f"{settings.BASE_URL}/service/{service.slug}/",
        }

        response_data = {"credentials": credentials}

        response_serializer = BindingResponseSerializer(data=response_data)
        response_serializer.is_valid(raise_exception=True)
        return Response(response_serializer.data, status=status.HTTP_201_CREATED)

    def delete(self, request, instance_id, binding_id):
        return Response(status=status.HTTP_200_OK)