# Copyright 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

from lcm.pub.database.models import NfInstModel
from lcm.pub.exceptions import NFLCMException

logger = logging.getLogger(__name__)


class DeleteVnf:
    def __init__(self, data, instanceid):
        self.data = data
        self.nf_inst_id = instanceid

    def do_biz(self):
        vnf_insts = NfInstModel.objects.filter(nfinstid=self.nf_inst_id)
        if not vnf_insts.exists():
            raise NFLCMException('VnfInst(%s) does not exist' % self.nf_inst_id)
        sel_vnf = vnf_insts[0]
        if sel_vnf.status != 'NOT_INSTANTIATED':
            raise NFLCMException("Don't allow to delete vnf(status:[%s])" % sel_vnf.status)
        NfInstModel.objects.filter(nfinstid=self.nf_inst_id).delete()