# Copyright 2019 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 json

import mock
from django.test import Client
from django.test import TestCase
from rest_framework import status

from lcm.ns.biz.ns_heal import NSHealService
from lcm.pub.database.models import NSInstModel, NfInstModel
from lcm.pub.exceptions import NSLCMException
from lcm.pub.utils.jobutil import JobUtil, JOB_TYPE


class TestHealNsApi(TestCase):
    def setUp(self):
        self.url = "/api/nslcm/v1/ns_instances/%s/heal"
        self.ns_inst_id = '1'
        self.nf_inst_id = '1'
        self.nf_uuid = '1-1-1'

        self.job_id = JobUtil.create_job("NS", JOB_TYPE.HEAL_VNF, self.ns_inst_id)

        self.client = Client()

        model = json.dumps({
            "metadata": {
                "vnfdId": "1",
                "vnfdName": "PGW001",
                "vnfProvider": "zte",
                "vnfdVersion": "V00001",
                "vnfVersion": "V5.10.20",
                "productType": "CN",
                "vnfType": "PGW",
                "description": "PGW VNFD description",
                "isShared": True,
                "vnfExtendType": "driver"
            }
        })
        NSInstModel.objects.filter().delete()
        NfInstModel.objects.filter().delete()
        NSInstModel(id=self.ns_inst_id, name="ns_name", status='null').save()
        NfInstModel.objects.create(nfinstid=self.nf_inst_id,
                                   nf_name='name_1',
                                   vnf_id='1',
                                   vnfm_inst_id='1',
                                   ns_inst_id=self.ns_inst_id,
                                   max_cpu='14',
                                   max_ram='12296',
                                   max_hd='101',
                                   max_shd="20",
                                   max_net=10,
                                   status='null',
                                   mnfinstid=self.nf_uuid,
                                   package_id='pkg1',
                                   vnfd_model=model)

    def tearDown(self):
        pass

    @mock.patch.object(NSHealService, 'run')
    def test_heal_vnf_url(self, mock_run):

        data = {
            "healVnfData": [{
                "vnfInstanceId": self.nf_inst_id,
                "cause": "vm is down",
                "additionalParams": {
                    "action": "restartvm",
                    "actionvminfo": {
                        "vmid": "33",
                        "vduid": "",
                        "vmname": "xgw-smp11"
                    }
                }
            }]
        }

        response = self.client.post(self.url % self.ns_inst_id, data=data)
        self.assertEqual(status.HTTP_202_ACCEPTED, response.status_code, response.data)
        self.assertIsNotNone(response.data)
        self.assertIsNotNone(response['Location'])

    # add healNsData

    @mock.patch.object(NSHealService, 'run')
    def test_heal_ns_url(self, mock_run):

        data = {
            "healNsData": {
                "vnfInstanceId": self.nf_inst_id,
                "cause": "",
                "additionalParams": {
                    "action": "vmreset",
                    "actionvminfo": {
                        "vmid": "33",
                        "vduid": "",
                        "vmname": "xgw-smp11"
                    }
                }
            }
        }

        response = self.client.post(self.url % self.ns_inst_id, data=data)
        self.assertEqual(status.HTTP_202_ACCEPTED, response.status_code, response.data)
        self.assertIsNotNone(response['Location'])

    @mock.patch.object(NSHealService, "start")
    def test_heal_vnf_non_existing_ns(self, mock_start):
        mock_start.side_effect = NSLCMException("NS Not Found")

        ns_inst_id = "2"

        data = {
            "healVnfData": [{
                "vnfInstanceId": self.nf_inst_id,
                "cause": "vm is down",
                "additionalParams": {
                    "action": "restartvm",
                    "actionvminfo": {
                        "vmid": "33",
                        "vmname": "xgw-smp11"
                    }
                }
            }]
        }

        response = self.client.post(self.url % ns_inst_id, data=data)
        self.assertEqual(response.status_code, status.HTTP_500_INTERNAL_SERVER_ERROR)

    # add healNsData
    @mock.patch.object(NSHealService, "start")
    def test_heal_ns_heal_non_existing_ns(self, mock_start):
        mock_start.side_effect = NSLCMException("NS Not Found")

        ns_inst_id = "2"

        data = {
            "healNsData": {
                "vnfInstanceId": self.nf_inst_id,
                "cause": "",
                "additionalParams": {
                    "action": "vmreset",
                    "actionvminfo": {
                        "vmid": "33",
                        "vduid": "",
                        "vmname": "xgw-smp11"
                    }
                }
            }
        }

        response = self.client.post(self.url % ns_inst_id, data=data)
        self.assertEqual(response.status_code, status.HTTP_500_INTERNAL_SERVER_ERROR)

    @mock.patch.object(NSHealService, "start")
    def test_heal_vnf_empty_post(self, mock_start):
        mock_start.side_effect = NSLCMException("healVnfData parameter does not exist or value is incorrect.")
        response = self.client.post(self.url % self.ns_inst_id, data={})
        self.assertEqual(response.status_code, status.HTTP_500_INTERNAL_SERVER_ERROR)