# -*- encoding: utf-8 -*-
#
# Copyright © 2013 eNovance <licensing@enovance.com>
#
# Authors: Mehdi Abaakouk <mehdi.abaakouk@enovance.com>
#
# 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 uuid
import mock

from ceilometer.alarm import rpc as rpc_alarm
from ceilometer.openstack.common import rpc
from ceilometer.openstack.common import test
from ceilometer.openstack.common import timeutils
from ceilometer.openstack.common.fixture import config
from ceilometer.openstack.common.fixture import moxstubout
from ceilometer.storage.models import Alarm as AlarmModel
from ceilometerclient.v2.alarms import Alarm as AlarmClient


class TestRPCAlarmNotifier(test.BaseTestCase):
    def faux_cast(self, context, topic, msg):
        self.notified.append((topic, msg))
        self.CONF = self.useFixture(config.Config()).conf

    def setUp(self):
        super(TestRPCAlarmNotifier, self).setUp()
        self.notified = []
        self.stubs = self.useFixture(moxstubout.MoxStubout()).stubs
        self.stubs.Set(rpc, 'cast', self.faux_cast)
        self.notifier = rpc_alarm.RPCAlarmNotifier()
        self.alarms = [
            AlarmClient(None, info={
                'name': 'instance_running_hot',
                'meter_name': 'cpu_util',
                'comparison_operator': 'gt',
                'threshold': 80.0,
                'evaluation_periods': 5,
                'statistic': 'avg',
                'state': 'ok',
                'ok_actions': ['http://host:8080/path'],
                'user_id': 'foobar',
                'project_id': 'snafu',
                'period': 60,
                'alarm_id': str(uuid.uuid4()),
                'matching_metadata':{'resource_id':
                                     'my_instance'}
            }),
            AlarmClient(None, info={
                'name': 'group_running_idle',
                'meter_name': 'cpu_util',
                'comparison_operator': 'le',
                'threshold': 10.0,
                'statistic': 'max',
                'evaluation_periods': 4,
                'state': 'insufficient data',
                'insufficient_data_actions': ['http://other_host/path'],
                'user_id': 'foobar',
                'project_id': 'snafu',
                'period': 300,
                'alarm_id': str(uuid.uuid4()),
                'matching_metadata':{'metadata.user_metadata.AS':
                                     'my_group'}
            }),
        ]

    def test_notify_alarm(self):
        previous = ['alarm', 'ok']
        for i, a in enumerate(self.alarms):
            self.notifier.notify(a, previous[i], "what? %d" % i)
        self.assertEqual(len(self.notified), 2)
        for i, a in enumerate(self.alarms):
            actions = getattr(a, AlarmModel.ALARM_ACTIONS_MAP[a.state])
            self.assertEqual(self.notified[i][0],
                             self.CONF.alarm.notifier_rpc_topic)
            self.assertEqual(self.notified[i][1]["args"]["data"]["alarm_id"],
                             self.alarms[i].alarm_id)
            self.assertEqual(self.notified[i][1]["args"]["data"]["actions"],
                             actions)
            self.assertEqual(self.notified[i][1]["args"]["data"]["previous"],
                             previous[i])
            self.assertEqual(self.notified[i][1]["args"]["data"]["current"],
                             self.alarms[i].state)
            self.assertEqual(self.notified[i][1]["args"]["data"]["reason"],
                             "what? %d" % i)

    def test_notify_non_string_reason(self):
        self.notifier.notify(self.alarms[0], 'ok', 42)
        reason = self.notified[0][1]['args']['data']['reason']
        self.assertTrue(isinstance(reason, basestring))

    def test_notify_no_actions(self):
        alarm = AlarmClient(None, info={
            'name': 'instance_running_hot',
            'meter_name': 'cpu_util',
            'comparison_operator': 'gt',
            'threshold': 80.0,
            'evaluation_periods': 5,
            'statistic': 'avg',
            'state': 'ok',
            'user_id': 'foobar',
            'project_id': 'snafu',
            'period': 60,
            'ok_actions': [],
            'alarm_id': str(uuid.uuid4()),
            'matching_metadata': {'resource_id':
                                  'my_instance'}
        })
        self.notifier.notify(alarm, 'alarm', "what?")
        self.assertEqual(len(self.notified), 0)


class TestRPCAlarmPartitionCoordination(test.BaseTestCase):
    def faux_fanout_cast(self, context, topic, msg):
        self.notified.append((topic, msg))

    def setUp(self):
        super(TestRPCAlarmPartitionCoordination, self).setUp()
        self.notified = []
        self.stubs = self.useFixture(moxstubout.MoxStubout()).stubs
        self.stubs.Set(rpc, 'fanout_cast', self.faux_fanout_cast)
        self.ordination = rpc_alarm.RPCAlarmPartitionCoordination()
        self.alarms = [mock.MagicMock(), mock.MagicMock()]

    def test_ordination_presence(self):
        id = uuid.uuid4()
        priority = float(timeutils.utcnow().strftime('%s.%f'))
        self.ordination.presence(id, priority)
        topic, msg = self.notified[0]
        self.assertEqual(topic, 'alarm_partition_coordination')
        self.assertEqual(msg['args']['data']['uuid'], id)
        self.assertEqual(msg['args']['data']['priority'], priority)
        self.assertEqual(msg['method'], 'presence')

    def test_ordination_assign(self):
        id = uuid.uuid4()
        self.ordination.assign(id, self.alarms)
        topic, msg = self.notified[0]
        self.assertEqual(topic, 'alarm_partition_coordination')
        self.assertEqual(msg['args']['data']['uuid'], id)
        self.assertEqual(len(msg['args']['data']['alarms']), 2)
        self.assertEqual(msg['method'], 'assign')

    def test_ordination_allocate(self):
        id = uuid.uuid4()
        self.ordination.allocate(id, self.alarms)
        topic, msg = self.notified[0]
        self.assertEqual(topic, 'alarm_partition_coordination')
        self.assertEqual(msg['args']['data']['uuid'], id)
        self.assertEqual(len(msg['args']['data']['alarms']), 2)
        self.assertEqual(msg['method'], 'allocate')