# Copyright 2016-2017 ZTE Corporation.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#         http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
import logging
import time

from drf_yasg.utils import swagger_auto_schema
from rest_framework import status
from rest_framework.response import Response
from rest_framework.views import APIView

from lcm.ns.biz.ns_terminate import TerminateNsService
from lcm.pub.exceptions import NSLCMException
from lcm.pub.exceptions import BadRequestException
from lcm.pub.utils.jobutil import JobUtil
from lcm.jobs.enum import JOB_TYPE, JOB_ACTION
from lcm.ns.serializers.deprecated.ns_serializers import _TerminateNsReqSerializer
from lcm.ns.serializers.deprecated.ns_serializers import _NsOperateJobSerializer
from .common import view_safe_call_with_log

logger = logging.getLogger(__name__)


class NSTerminateView(APIView):
    @swagger_auto_schema(
        request_body=_TerminateNsReqSerializer(),
        responses={
            status.HTTP_202_ACCEPTED: _NsOperateJobSerializer(),
            status.HTTP_400_BAD_REQUEST: "Bad Request",
            status.HTTP_500_INTERNAL_SERVER_ERROR: "Inner error"
        }
    )
    @view_safe_call_with_log(logger=logger)
    def post(self, request, ns_instance_id):
        """
        Terminate a NS instance
        :param request:
        :param ns_instance_id:
        :return:
        """
        logger.debug("Enter TerminateNSView::post %s", request.data)
        req_serializer = _TerminateNsReqSerializer(data=request.data)
        if not req_serializer.is_valid():
            raise BadRequestException(req_serializer.errors)

        job_id = JobUtil.create_job(JOB_TYPE.NS, JOB_ACTION.TERMINATE, ns_instance_id)
        time.sleep(2)
        TerminateNsService(ns_instance_id, job_id, request.data).start()

        resp_serializer = _NsOperateJobSerializer(data={'jobId': job_id})
        if not resp_serializer.is_valid():
            raise NSLCMException(resp_serializer.errors)

        logger.debug("Leave TerminateNSView::post ret=%s", {'jobId': job_id})
        return Response(data={'jobId': job_id}, status=status.HTTP_202_ACCEPTED)