# Copyright 2014 eBay Software Foundation
# Copyright [2015] Hewlett-Packard Development Company, L.P.
# All Rights Reserved.
#
#    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.

from unittest.mock import MagicMock, Mock, patch, PropertyMock

from trove.backup.models import Backup
from trove.common import cfg
from trove.common.exception import TroveError, ReplicationSlaveAttachError
from trove.common import server_group as srv_grp
from trove.instance.tasks import InstanceTasks
from trove.taskmanager.manager import Manager
from trove.taskmanager import models
from trove.taskmanager import service
from trove.tests.unittests import trove_testtools

CONF = cfg.CONF


class TestManager(trove_testtools.TestCase):

    def setUp(self):
        super(TestManager, self).setUp()
        self.manager = Manager()
        self.context = trove_testtools.TroveTestContext(self)
        self.mock_slave1 = Mock()
        self.mock_slave2 = Mock()
        type(self.mock_slave1).id = PropertyMock(return_value='some-inst-id')
        type(self.mock_slave2).id = PropertyMock(return_value='inst1')

        self.mock_old_master = Mock()
        type(self.mock_old_master).slaves = PropertyMock(
            return_value=[self.mock_slave1, self.mock_slave2])
        self.mock_master = Mock()
        type(self.mock_master).slaves = PropertyMock(
            return_value=[self.mock_slave1, self.mock_slave2])

    def tearDown(self):
        super(TestManager, self).tearDown()
        self.manager = None

    def test_getattr_lookup(self):
        self.assertTrue(callable(self.manager.delete_cluster))
        self.assertTrue(callable(self.manager.mongodb_add_shard_cluster))

    def test_most_current_replica(self):
        master = Mock()
        master.id = 32

        def test_case(txn_list, selected_master):
            with patch.object(self.manager, '_get_replica_txns',
                              return_value=txn_list):
                result = self.manager._most_current_replica(master, None)
                self.assertEqual(result, selected_master)

        with self.assertRaisesRegex(TroveError,
                                    'not all replicating from same'):
            test_case([['a', '2a99e-32bf', 2], ['b', '2a', 1]], None)

        test_case([['a', '2a99e-32bf', 2]], 'a')
        test_case([['a', '2a', 1], ['b', '2a', 2]], 'b')
        test_case([['a', '2a', 2], ['b', '2a', 1]], 'a')
        test_case([['a', '2a', 1], ['b', '2a', 1]], 'a')
        test_case([['a', None, 0]], 'a')
        test_case([['a', None, 0], ['b', '2a', 1]], 'b')

    def test_detach_replica(self):
        slave = Mock()
        master = Mock()
        with patch.object(models.BuiltInstanceTasks, 'load',
                          side_effect=[slave, master]):
            self.manager.detach_replica(self.context, 'some-inst-id')
        slave.detach_replica.assert_called_with(master)

    @patch.object(Manager, '_set_task_status')
    def test_promote_to_replica_source(self, mock_set_task_status):
        with patch.object(models.BuiltInstanceTasks, 'load',
                          side_effect=[self.mock_slave1,
                                       self.mock_old_master,
                                       self.mock_slave2]):
            self.manager.promote_to_replica_source(
                self.context, 'some-inst-id')

        self.mock_slave1.detach_replica.assert_called_with(
            self.mock_old_master, for_failover=True)
        self.mock_old_master.attach_replica.assert_called_with(
            self.mock_slave1, restart=False)
        self.mock_slave1.make_read_only.assert_called_with(False)

        self.mock_slave2.detach_replica.assert_called_with(
            self.mock_old_master, for_failover=True)
        self.mock_slave2.attach_replica.assert_called_with(self.mock_slave1,
                                                           restart=True)

        self.mock_old_master.demote_replication_master.assert_any_call()

        mock_set_task_status.assert_called_with(([self.mock_old_master] +
                                                 [self.mock_slave1,
                                                  self.mock_slave2]),
                                                InstanceTasks.NONE)

    @patch.object(Manager, '_set_task_status')
    @patch.object(Manager, '_most_current_replica')
    def test_eject_replica_source(self, mock_most_current_replica,
                                  mock_set_task_status):
        with patch.object(models.BuiltInstanceTasks, 'load',
                          side_effect=[self.mock_master, self.mock_slave1,
                                       self.mock_slave2]):
            self.manager.eject_replica_source(self.context, 'some-inst-id')
        mock_most_current_replica.assert_called_with(self.mock_master,
                                                     [self.mock_slave1,
                                                      self.mock_slave2])
        mock_set_task_status.assert_called_with(([self.mock_master] +
                                                 [self.mock_slave1,
                                                  self.mock_slave2]),
                                                InstanceTasks.NONE)

    @patch.object(Manager, '_set_task_status')
    @patch('trove.taskmanager.manager.LOG')
    def test_exception_TroveError_promote_to_replica_source(self, *args):
        self.mock_slave2.detach_replica = Mock(side_effect=TroveError)
        with patch.object(models.BuiltInstanceTasks, 'load',
                          side_effect=[self.mock_slave1, self.mock_old_master,
                                       self.mock_slave2]):
            self.assertRaises(ReplicationSlaveAttachError,
                              self.manager.promote_to_replica_source,
                              self.context, 'some-inst-id')

    @patch.object(Manager, '_set_task_status')
    @patch.object(Manager, '_most_current_replica')
    @patch('trove.taskmanager.manager.LOG')
    def test_exception_TroveError_eject_replica_source(
            self, mock_logging, mock_most_current_replica,
            mock_set_task_status):
        self.mock_slave2.detach_replica = Mock(side_effect=TroveError)
        mock_most_current_replica.return_value = self.mock_slave1
        with patch.object(models.BuiltInstanceTasks, 'load',
                          side_effect=[self.mock_master, self.mock_slave1,
                                       self.mock_slave2]):
            self.assertRaises(ReplicationSlaveAttachError,
                              self.manager.eject_replica_source,
                              self.context, 'some-inst-id')

    @patch.object(Manager, '_set_task_status')
    def test_error_promote_to_replica_source(self, *args):
        self.mock_slave2.detach_replica = Mock(
            side_effect=RuntimeError('Error'))

        with patch.object(models.BuiltInstanceTasks, 'load',
                          side_effect=[self.mock_slave1, self.mock_old_master,
                                       self.mock_slave2]):
            self.assertRaisesRegex(RuntimeError, 'Error',
                                   self.manager.promote_to_replica_source,
                                   self.context, 'some-inst-id')

    @patch('trove.taskmanager.manager.LOG')
    def test_error_demote_replication_master_promote_to_replica_source(
            self, mock_logging):
        self.mock_old_master.demote_replication_master = Mock(
            side_effect=RuntimeError('Error'))

        with patch.object(models.BuiltInstanceTasks, 'load',
                          side_effect=[self.mock_slave1, self.mock_old_master,
                                       self.mock_slave2]):
            self.assertRaises(ReplicationSlaveAttachError,
                              self.manager.promote_to_replica_source,
                              self.context, 'some-inst-id')

    @patch.object(Manager, '_set_task_status')
    @patch.object(Manager, '_most_current_replica')
    def test_error_eject_replica_source(self, mock_most_current_replica,
                                        mock_set_task_status):
        self.mock_slave2.detach_replica = Mock(
            side_effect=RuntimeError('Error'))
        mock_most_current_replica.return_value = self.mock_slave1
        with patch.object(models.BuiltInstanceTasks, 'load',
                          side_effect=[self.mock_master, self.mock_slave1,
                                       self.mock_slave2]):
            self.assertRaisesRegex(RuntimeError, 'Error',
                                   self.manager.eject_replica_source,
                                   self.context, 'some-inst-id')

    @patch.object(Backup, 'delete')
    @patch.object(models.BuiltInstanceTasks, 'load')
    def test_create_replication_slave(self, mock_load, mock_backup_delete):
        mock_tasks = Mock()
        mock_snapshot = {'dataset': {'snapshot_id': 'test-id'}}
        mock_tasks.get_replication_master_snapshot = Mock(
            return_value=mock_snapshot)
        mock_flavor = Mock()
        with patch.object(models.FreshInstanceTasks, 'load',
                          return_value=mock_tasks):
            self.manager.create_instance(self.context, ['id1'], Mock(),
                                         mock_flavor, Mock(), None, None,
                                         'mysql', 'mysql-server', 2,
                                         'temp-backup-id', None,
                                         'some_password', None, Mock(),
                                         'some-master-id', None, None,
                                         None, None)
        mock_tasks.get_replication_master_snapshot.assert_called_with(
            self.context, 'some-master-id', mock_flavor,
            parent_backup_id='temp-backup-id', snapshot_driver='swift')
        mock_backup_delete.assert_called_with(self.context, 'test-id')

    @patch.object(Backup, 'delete')
    @patch.object(models.BuiltInstanceTasks, 'load')
    def test_create_replication_cinder(self, mock_load, mock_backup_delete):
        CONF.set_override('replica_snapshot_driver', 'cinder')
        mock_tasks = Mock()
        mock_snapshot = {'dataset': {'snapshot_id': 'test-id'}}
        mock_tasks.get_replication_master_snapshot = Mock(
            return_value=mock_snapshot)
        mock_flavor = Mock()
        mock_volume = mock_tasks.volume_client.volumes.get.return_value
        mock_volume.availability_zone = 'nova'

        mock_tasks.get_instance()
        with patch.object(models.FreshInstanceTasks, 'load',
                          return_value=mock_tasks):
            self.manager._create_replication_slave(
                self.context, ['id_slave'], 'mysql-server',
                mock_flavor, Mock(), None, None,
                'mysql', None, 2, 'nova', ['password'], None,
                None, 'some-master-id', None, None, None, None, None)

        mock_tasks.get_replication_master_snapshot.assert_called_with(
            self.context, 'some-master-id', mock_flavor,
            parent_backup_id=None, snapshot_driver='cinder')
        mock_backup_delete.assert_called_with(self.context, 'test-id')

    @patch.object(models.FreshInstanceTasks, 'load')
    @patch.object(Backup, 'delete')
    @patch.object(models.BuiltInstanceTasks, 'load')
    @patch('trove.taskmanager.manager.LOG')
    def test_exception_create_replication_slave(self, mock_logging, mock_tasks,
                                                mock_delete, mock_load):
        mock_load.return_value.create_instance = Mock(side_effect=TroveError)
        self.assertRaises(TroveError, self.manager.create_instance,
                          self.context, ['id1', 'id2'], Mock(), Mock(),
                          Mock(), None, None, 'mysql', 'mysql-server', 2,
                          'temp-backup-id', None, 'some_password', None,
                          Mock(), 'some-master-id', None, None, None, None)

    def test_AttributeError_create_instance(self):
        self.assertRaisesRegex(
            AttributeError, 'Cannot create multiple non-replica instances.',
            self.manager.create_instance, self.context, ['id1', 'id2'],
            Mock(), Mock(), Mock(), None, None, 'mysql', 'mysql-server', 2,
            'temp-backup-id', None, 'some_password', None, Mock(), None, None,
            None, None, None)

    def test_create_instance(self):
        mock_tasks = Mock()
        mock_flavor = Mock()
        mock_override = Mock()
        mock_csg = Mock()
        type(mock_csg.return_value).id = PropertyMock(
            return_value='sg-id')
        with patch.object(models.FreshInstanceTasks, 'load',
                          return_value=mock_tasks):
            with patch.object(srv_grp.ServerGroup, 'create', mock_csg):
                self.manager.create_instance(
                    self.context, 'id1', 'inst1', mock_flavor,
                    'mysql-image-id', None, None, 'mysql', 'mysql-server', 2,
                    'temp-backup-id', None, 'password', None, mock_override,
                    None, None, None, None, 'affinity')

        mock_tasks.create_instance.assert_called_with(
            mock_flavor,
            'mysql-image-id', None,
            None, 'mysql',
            'mysql-server', 2,
            'temp-backup-id', None,
            'password', None,
            mock_override,
            None, None, None, None,
            {'group': 'sg-id'},
            access=None, ds_version=None)
        mock_tasks.wait_for_instance.assert_called_with(3600, mock_flavor)

    def test_create_cluster(self):
        mock_tasks = Mock()
        with patch.object(models, 'load_cluster_tasks',
                          return_value=mock_tasks):
            self.manager.create_cluster(self.context, 'some-cluster-id')
        mock_tasks.create_cluster.assert_called_with(self.context,
                                                     'some-cluster-id')

    def test_delete_cluster(self):
        mock_tasks = Mock()
        with patch.object(models, 'load_cluster_tasks',
                          return_value=mock_tasks):
            self.manager.delete_cluster(self.context, 'some-cluster-id')
        mock_tasks.delete_cluster.assert_called_with(self.context,
                                                     'some-cluster-id')

    def test_shrink_cluster_with_success(self):
        self._assert_shrink_cluster(True)

    def test_shrink_cluster_with_error(self):
        self._assert_shrink_cluster(False)

    @patch('trove.taskmanager.manager.EndNotification')
    @patch('trove.taskmanager.manager.models.load_cluster_tasks')
    def _assert_shrink_cluster(self, success, mock_load, mock_notification):
        if success:
            mock_load.side_effect = Mock()
        else:
            mock_load.side_effect = Exception

        end_notification = MagicMock()
        mock_notification.return_value = end_notification
        context = Mock()
        cluster_id = Mock()
        instance_ids = Mock()

        try:
            self.manager.shrink_cluster(context, cluster_id, instance_ids)
            self.assertTrue(success)
        except Exception:
            self.assertFalse(success)

        mock_load.assert_called_once_with(context, cluster_id)
        mock_notification.assert_called_once_with(context,
                                                  cluster_id=cluster_id,
                                                  instance_ids=instance_ids)
        exit_error_type = end_notification.__exit__.call_args_list[0][0][0]
        if success:
            self.assertFalse(exit_error_type)
        else:
            self.assertTrue(exit_error_type)


class TestTaskManagerService(trove_testtools.TestCase):
    def test_app_factory(self):
        test_service = service.app_factory(Mock())
        self.assertIsInstance(test_service, service.TaskService)
