# Copyright 2016 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 uuid

from lcm.pub.config.config import REPORT_TO_AAI
from lcm.pub.database.models import NSInstModel
from lcm.pub.exceptions import NSLCMException
from lcm.pub.msapi.aai import create_customer_aai
from lcm.pub.msapi.sdc_run_catalog import query_nspackage_by_id
from lcm.pub.utils.timeutil import now_time
from lcm.pub.utils.values import ignore_case_get

logger = logging.getLogger(__name__)


class CreateNSService(object):
    def __init__(self, nsd_id, ns_name, description):
        self.nsd_id = nsd_id
        self.ns_name = ns_name
        self.description = description
        self.ns_inst_id = ''
        self.ns_package_id = ''

    def do_biz(self):
        self.check_nsd_valid()
        self.check_ns_inst_name_exist()
        self.create_ns_inst()
        if REPORT_TO_AAI:
            self.create_ns_in_aai()
        logger.debug("CreateNSService::do_biz::ns_inst_id=%s" % self.ns_inst_id)
        return self.ns_inst_id

    def check_nsd_valid(self):
        logger.debug("CreateNSService::check_nsd_valid::nsd_id=%s" % self.nsd_id)
        ns_package_info = query_nspackage_by_id(self.nsd_id)
        if not ns_package_info:
            raise NSLCMException("nsd(%s) not exists." % self.nsd_id)
        packageInfo = ns_package_info["packageInfo"]
        self.ns_package_id = ignore_case_get(packageInfo, "nsPackageId")
        logger.debug("CreateNSService::check_nsd_valid::ns_package_id=%s" % self.ns_package_id)

    def check_ns_inst_name_exist(self):
        is_exist = NSInstModel.objects.filter(name=self.ns_name).exists()
        logger.debug("CreateNSService::check_ns_inst_name_exist::is_exist=%s" % is_exist)
        if is_exist:
            raise NSLCMException("ns(%s) already existed." % self.ns_name)

    def create_ns_inst(self):
        self.ns_inst_id = str(uuid.uuid4())
        logger.debug("CreateNSService::create_ns_inst::ns_inst_id=%s" % self.ns_inst_id)
        NSInstModel(id=self.ns_inst_id, name=self.ns_name, nspackage_id=self.ns_package_id,
                    nsd_id=self.nsd_id, description=self.description, status='empty',
                    lastuptime=now_time()).save()

    def create_ns_in_aai(self):
        logger.debug("CreateNSService::create_ns_in_aai::report ns instance[%s] to aai." % self.ns_inst_id)
        global_customer_id = "global-customer-id-" + self.ns_inst_id
        data = {
            "global-customer-id": "global-customer-id-" + self.ns_inst_id,
            "subscriber-name": "subscriber-name-" + self.ns_inst_id,
            "subscriber-type": "subscriber-type-" + self.ns_inst_id,
            "service-subscriptions": {
                "service-subscription": [
                    {
                        "service-type": "service-type-" + self.ns_inst_id,
                        "service-instances": {
                            "service-instance": [
                                {
                                    "service-instance-id": self.ns_inst_id,
                                    "service-instance-name": self.ns_name,
                                    "service-type": "service-type-" + self.ns_inst_id,
                                    "service-role": "service-role-" + self.ns_inst_id
                                }
                            ]
                        }
                    }
                ]
            }
        }
        resp_data, resp_status = create_customer_aai(global_customer_id, data)
        if resp_data:
            logger.debug("Fail to create ns[%s] to aai: [%s].", self.ns_inst_id, resp_status)
        else:
            logger.debug("Success to create ns[%s] to aai: [%s].", self.ns_inst_id, resp_status)