# Copyright 2017 The Armada Authors.
#
# 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 mock
from mock import MagicMock

from armada.exceptions import tiller_exceptions as ex
from armada.handlers import tiller
from armada.tests.unit import base


class TillerTestCase(base.ArmadaTestCase):

    @mock.patch.object(tiller.Tiller, '_get_tiller_ip')
    @mock.patch('armada.handlers.tiller.K8s')
    @mock.patch('armada.handlers.tiller.grpc')
    @mock.patch('armada.handlers.tiller.Config')
    @mock.patch('armada.handlers.tiller.InstallReleaseRequest')
    @mock.patch('armada.handlers.tiller.ReleaseServiceStub')
    def test_install_release(self, mock_stub, mock_install_request,
                             mock_config, mock_grpc, mock_k8s, mock_ip):
        # instantiate Tiller object
        mock_grpc.insecure_channel.return_value = None
        mock_ip.return_value = '0.0.0.0'
        tiller_obj = tiller.Tiller()
        assert tiller_obj._get_tiller_ip() == '0.0.0.0'

        # set params
        chart = mock.Mock()
        name = None
        namespace = None
        initial_values = None
        updated_values = mock_config(raw=initial_values)
        wait = False
        timeout = 3600

        tiller_obj.install_release(
            chart, name, namespace, values=initial_values,
            wait=wait, timeout=timeout)

        mock_stub.assert_called_with(tiller_obj.channel)
        release_request = mock_install_request(
            chart=chart,
            values=updated_values,
            release=name,
            namespace=namespace,
            wait=wait,
            timeout=timeout
        )
        (mock_stub(tiller_obj.channel).InstallRelease
         .assert_called_with(release_request,
                             timeout + 60,
                             metadata=tiller_obj.metadata))

    @mock.patch('armada.handlers.tiller.K8s', autospec=True)
    @mock.patch.object(tiller.Tiller, '_get_tiller_ip', autospec=True)
    @mock.patch.object(tiller.Tiller, '_get_tiller_port', autospec=True)
    @mock.patch('armada.handlers.tiller.grpc', autospec=True)
    def test_get_channel(self, mock_grpc, mock_port, mock_ip, _):
        mock_port.return_value = mock.sentinel.port
        mock_ip.return_value = mock.sentinel.ip

        # instantiate Tiller object
        mock_grpc.insecure_channel.return_value = 'connected'
        tiller_obj = tiller.Tiller()

        self.assertIsNotNone(tiller_obj.channel)
        self.assertEqual('connected', tiller_obj.channel)

        mock_grpc.insecure_channel.assert_called_once_with(
            '%s:%s' % (str(mock.sentinel.ip), str(mock.sentinel.port)),
            options=[('grpc.max_send_message_length',
                     tiller.MAX_MESSAGE_LENGTH),
                     ('grpc.max_receive_message_length',
                     tiller.MAX_MESSAGE_LENGTH)]
        )

    @mock.patch('armada.handlers.tiller.K8s', autospec=True)
    @mock.patch('armada.handlers.tiller.grpc', autospec=True)
    def test_get_tiller_ip_with_host_provided(self, mock_grpc, _):
        tiller_obj = tiller.Tiller('1.1.1.1')
        self.assertIsNotNone(tiller_obj._get_tiller_ip())
        self.assertEqual('1.1.1.1', tiller_obj._get_tiller_ip())

    @mock.patch.object(tiller.Tiller, '_get_tiller_pod', autospec=True)
    @mock.patch('armada.handlers.tiller.K8s', autospec=True)
    @mock.patch('armada.handlers.tiller.grpc', autospec=True)
    def test_get_tiller_ip_with_mocked_pod(self, mock_grpc, mock_k8s,
                                           mock_pod):
        status = mock.Mock(pod_ip='1.1.1.1')
        mock_pod.return_value.status = status
        tiller_obj = tiller.Tiller()
        self.assertEqual('1.1.1.1', tiller_obj._get_tiller_ip())

    @mock.patch.object(tiller.Tiller, '_get_tiller_ip', autospec=True)
    @mock.patch('armada.handlers.tiller.K8s', autospec=True)
    @mock.patch('armada.handlers.tiller.grpc', autospec=True)
    def test_get_tiller_pod_throws_exception(self, mock_grpc, mock_k8s,
                                             mock_ip):

        mock_k8s.get_namespace_pod.return_value.items = []
        tiller_obj = tiller.Tiller()
        mock_grpc.insecure_channel.side_effect = ex.ChannelException()
        self.assertRaises(ex.TillerPodNotRunningException,
                          tiller_obj._get_tiller_pod)

    @mock.patch.object(tiller.Tiller, '_get_tiller_ip', autospec=True)
    @mock.patch('armada.handlers.tiller.K8s', autospec=True)
    @mock.patch('armada.handlers.tiller.grpc', autospec=True)
    def test_get_tiller_port(self, mock_grpc, _, mock_ip):
        # instantiate Tiller object
        tiller_obj = tiller.Tiller(None, '8080', None)
        self.assertEqual('8080', tiller_obj._get_tiller_port())

    @mock.patch.object(tiller.Tiller, '_get_tiller_ip', autospec=True)
    @mock.patch('armada.handlers.tiller.K8s', autospec=True)
    @mock.patch('armada.handlers.tiller.grpc', autospec=True)
    def test_get_tiller_namespace(self, mock_grpc, _, mock_ip):
        # verifies namespace set via instantiation
        tiller_obj = tiller.Tiller(None, None, 'test_namespace2')
        self.assertEqual('test_namespace2',
                         tiller_obj._get_tiller_namespace())

    @mock.patch.object(tiller.Tiller, '_get_tiller_ip', autospec=True)
    @mock.patch('armada.handlers.tiller.K8s', autospec=True)
    @mock.patch('armada.handlers.tiller.grpc', autospec=True)
    def test_get_tiller_status_with_ip_provided(self, mock_grpc, _, mock_ip):
        # instantiate Tiller object
        tiller_obj = tiller.Tiller(None, '8080', None)
        self.assertTrue(tiller_obj.tiller_status())

    @mock.patch.object(tiller.Tiller, '_get_tiller_ip', autospec=True)
    @mock.patch('armada.handlers.tiller.K8s', autospec=True)
    @mock.patch('armada.handlers.tiller.grpc', autospec=True)
    def test_get_tiller_status_no_ip(self, mock_grpc, _, mock_ip):
        mock_ip.return_value = ''
        # instantiate Tiller object
        tiller_obj = tiller.Tiller()
        self.assertFalse(tiller_obj.tiller_status())

    @mock.patch.object(tiller.Tiller, '_get_tiller_ip', autospec=True)
    @mock.patch('armada.handlers.tiller.K8s', autospec=True)
    @mock.patch('armada.handlers.tiller.grpc', autospec=True)
    def test_list_releases_empty(self, mock_grpc, _, mock_ip):
        # instantiate Tiller object
        tiller_obj = tiller.Tiller()
        self.assertEqual([], tiller_obj.list_releases())

    @mock.patch.object(tiller.Tiller, '_get_tiller_ip', autospec=True)
    @mock.patch('armada.handlers.tiller.K8s', autospec=True)
    @mock.patch('armada.handlers.tiller.grpc', autospec=True)
    def test_list_charts_empty(self, mock_grpc, _, mock_ip):
        # instantiate Tiller object
        tiller_obj = tiller.Tiller()
        self.assertEqual([], tiller_obj.list_charts())

    @mock.patch('armada.handlers.tiller.K8s')
    @mock.patch('armada.handlers.tiller.grpc')
    @mock.patch.object(tiller, 'ListReleasesRequest')
    @mock.patch.object(tiller, 'ReleaseServiceStub')
    def test_list_releases(self, mock_release_service_stub,
                           mock_list_releases_request, mock_grpc, _):
        mock_release_service_stub.return_value.ListReleases. \
            return_value = [mock.Mock(releases=['foo', 'bar'])]

        tiller_obj = tiller.Tiller('host', '8080', None)
        self.assertEqual(['foo', 'bar'], tiller_obj.list_releases())

        mock_release_service_stub.assert_called_once_with(
            tiller_obj.channel)
        list_releases_stub = mock_release_service_stub.return_value. \
            ListReleases
        list_releases_stub.assert_called_once_with(
            mock_list_releases_request.return_value, tiller_obj.timeout,
            metadata=tiller_obj.metadata)

        mock_list_releases_request.assert_called_once_with(
            limit=tiller.RELEASE_LIMIT,
            status_codes=[tiller.const.STATUS_DEPLOYED,
                          tiller.const.STATUS_FAILED],
            sort_by='LAST_RELEASED',
            sort_order='DESC')

    @mock.patch('armada.handlers.tiller.K8s')
    @mock.patch('armada.handlers.tiller.grpc')
    @mock.patch.object(tiller, 'GetReleaseContentRequest')
    @mock.patch.object(tiller, 'ReleaseServiceStub')
    def test_get_release_content(self, mock_release_service_stub,
                                 mock_release_content_request,
                                 mock_grpc, _):
        mock_release_service_stub.return_value.GetReleaseContent\
            .return_value = {}

        tiller_obj = tiller.Tiller('host', '8080', None)

        self.assertEqual({}, tiller_obj.get_release_content('release'))
        get_release_content_stub = mock_release_service_stub. \
            return_value.GetReleaseContent
        get_release_content_stub.assert_called_once_with(
            mock_release_content_request.return_value, tiller_obj.timeout,
            metadata=tiller_obj.metadata)

    @mock.patch('armada.handlers.tiller.K8s')
    @mock.patch('armada.handlers.tiller.grpc')
    @mock.patch.object(tiller, 'GetVersionRequest')
    @mock.patch.object(tiller, 'ReleaseServiceStub')
    def test_tiller_version(self, mock_release_service_stub,
                            mock_version_request,
                            mock_grpc, _):

        mock_version = mock.Mock()
        mock_version.Version.sem_ver = mock.sentinel.sem_ver
        mock_release_service_stub.return_value.GetVersion\
            .return_value = mock_version

        tiller_obj = tiller.Tiller('host', '8080', None)

        self.assertEqual(mock.sentinel.sem_ver, tiller_obj.tiller_version())

        mock_release_service_stub.assert_called_once_with(
            tiller_obj.channel)

        get_version_stub = mock_release_service_stub.return_value.GetVersion
        get_version_stub.assert_called_once_with(
            mock_version_request.return_value, tiller_obj.timeout,
            metadata=tiller_obj.metadata)

    @mock.patch('armada.handlers.tiller.K8s')
    @mock.patch('armada.handlers.tiller.grpc')
    @mock.patch.object(tiller, 'GetVersionRequest')
    @mock.patch.object(tiller, 'GetReleaseStatusRequest')
    @mock.patch.object(tiller, 'ReleaseServiceStub')
    def test_get_release_status(self, mock_release_service_stub,
                                mock_rel_status_request, mock_version_request,
                                mock_grpc, _):
        mock_release_service_stub.return_value.GetReleaseStatus. \
            return_value = {}

        tiller_obj = tiller.Tiller('host', '8080', None)
        self.assertEqual({}, tiller_obj.get_release_status('release'))

        mock_release_service_stub.assert_called_once_with(
            tiller_obj.channel)
        get_release_status_stub = mock_release_service_stub.return_value. \
            GetReleaseStatus
        get_release_status_stub.assert_called_once_with(
            mock_rel_status_request.return_value, tiller_obj.timeout,
            metadata=tiller_obj.metadata)

    @mock.patch('armada.handlers.tiller.K8s')
    @mock.patch('armada.handlers.tiller.grpc')
    @mock.patch.object(tiller, 'UninstallReleaseRequest')
    @mock.patch.object(tiller, 'ReleaseServiceStub')
    def test_uninstall_release(self, mock_release_service_stub,
                               mock_uninstall_release_request,
                               mock_grpc, _):
        mock_release_service_stub.return_value.UninstallRelease\
            .return_value = {}

        tiller_obj = tiller.Tiller('host', '8080', None)

        self.assertEqual({}, tiller_obj.uninstall_release('release'))

        mock_release_service_stub.assert_called_once_with(
            tiller_obj.channel)
        uninstall_release_stub = mock_release_service_stub.return_value. \
            UninstallRelease

        uninstall_release_stub.assert_called_once_with(
            mock_uninstall_release_request.return_value, tiller_obj.timeout,
            metadata=tiller_obj.metadata)

    @mock.patch('armada.handlers.tiller.K8s')
    @mock.patch('armada.handlers.tiller.grpc')
    @mock.patch.object(tiller, 'RollbackReleaseRequest')
    @mock.patch.object(tiller, 'ReleaseServiceStub')
    def test_rollback_release(self, mock_release_service_stub,
                              mock_rollback_release_request, _, __):
        mock_release_service_stub.return_value.RollbackRelease\
            .return_value = {}

        dry_run = True

        tiller_obj = tiller.Tiller('host', '8080', None, dry_run=dry_run)

        release = 'release'
        version = 0
        wait = True
        timeout = 123
        recreate_pods = True
        force = True

        self.assertIsNone(tiller_obj.rollback_release(
            release, version, wait=wait, timeout=timeout, force=force,
            recreate_pods=recreate_pods))

        mock_rollback_release_request.assert_called_once_with(
            name=release,
            version=version,
            dry_run=dry_run,
            wait=wait,
            timeout=timeout,
            force=force,
            recreate=recreate_pods)

        mock_release_service_stub.assert_called_once_with(
            tiller_obj.channel)
        rollback_release_stub = mock_release_service_stub.return_value. \
            RollbackRelease

        rollback_release_stub.assert_called_once_with(
            mock_rollback_release_request.return_value, timeout +
            tiller.GRPC_EPSILON,
            metadata=tiller_obj.metadata)

    @mock.patch('armada.handlers.tiller.K8s')
    @mock.patch('armada.handlers.tiller.grpc')
    @mock.patch('armada.handlers.tiller.Config')
    @mock.patch.object(tiller, 'UpdateReleaseRequest')
    @mock.patch.object(tiller, 'ReleaseServiceStub')
    def test_update_release(self, mock_release_service_stub,
                            mock_update_release_request, mock_config,
                            _, __):
        release = 'release'
        chart = {}
        namespace = 'namespace'
        code = 0
        status = 'DEPLOYED'
        description = 'desc'
        version = 2
        values = mock_config(raw=None)
        mock_release_service_stub.return_value.UpdateRelease.return_value =\
            AttrDict(**{
                'release': AttrDict(**{
                    'name': release,
                    'namespace': namespace,
                    'info': AttrDict(**{
                        'status': AttrDict(**{
                            'Code': AttrDict(**{
                                'Name': lambda c:
                                    status if c == code else None
                            }),
                            'code': code
                        }),
                        'Description': description
                    }),
                    'version': version
                })
            })

        tiller_obj = tiller.Tiller('host', '8080', None, dry_run=False)

        # TODO: Test these methods as well, either by unmocking, or adding
        #       separate tests for them.
        tiller_obj._pre_update_actions = MagicMock()
        tiller_obj._post_update_actions = MagicMock()

        pre_actions = {}
        post_actions = {}
        disable_hooks = False
        wait = True
        timeout = 123
        force = True
        recreate_pods = True

        result = tiller_obj.update_release(
            chart, release, namespace,
            pre_actions=pre_actions,
            post_actions=post_actions,
            disable_hooks=disable_hooks,
            values=values,
            wait=wait,
            timeout=timeout,
            force=force,
            recreate_pods=recreate_pods)

        tiller_obj._pre_update_actions.assert_called_once_with(
            pre_actions, release, namespace, chart, disable_hooks, values,
            timeout)
        tiller_obj._post_update_actions.assert_called_once_with(
            post_actions, namespace)

        mock_update_release_request.assert_called_once_with(
            chart=chart,
            name=release,
            dry_run=tiller_obj.dry_run,
            disable_hooks=False,
            values=values,
            wait=wait,
            timeout=timeout,
            force=force,
            recreate=recreate_pods)

        mock_release_service_stub.assert_called_once_with(
            tiller_obj.channel)
        update_release_stub = mock_release_service_stub.return_value. \
            UpdateRelease

        update_release_stub.assert_called_once_with(
            mock_update_release_request.return_value, timeout +
            tiller.GRPC_EPSILON,
            metadata=tiller_obj.metadata)

        expected_result = tiller.TillerResult(
            release,
            namespace,
            status,
            description,
            version)

        self.assertEqual(expected_result, result)


class AttrDict(dict):
    def __init__(self, *args, **kwargs):
        super(AttrDict, self).__init__(*args, **kwargs)
        self.__dict__ = self