# Copyright 2016 Canonical Ltd
#
# 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 mock import call, MagicMock, patch

import ceilometer_utils as utils

from test_utils import CharmTestCase

TO_PATCH = [
    'get_os_codename_package',
    'templating',
    'CeilometerServiceContext',
    'config',
    'get_os_codename_install_source',
    'configure_installation_source',
    'apt_install',
    'apt_update',
    'apt_upgrade',
    'log'
]


class CeilometerUtilsTest(CharmTestCase):

    def setUp(self):
        super(CeilometerUtilsTest, self).setUp(utils, TO_PATCH)

    def tearDown(self):
        super(CeilometerUtilsTest, self).tearDown()

    def test_register_configs(self):
        configs = utils.register_configs()
        calls = []
        for conf in utils.CONFIG_FILES:
            calls.append(call(conf,
                              utils.CONFIG_FILES[conf]['hook_contexts']))
        configs.register.assert_has_calls(calls, any_order=True)

    def test_restart_map(self):
        restart_map = utils.restart_map()
        self.assertEquals(restart_map,
                          {'/etc/ceilometer/ceilometer.conf': [
                              'ceilometer-agent-compute']})

    def test_do_openstack_upgrade(self):
        self.config.side_effect = self.test_config.get
        self.test_config.set('openstack-origin', 'cloud:precise-havana')
        self.get_os_codename_install_source.return_value = 'havana'
        configs = MagicMock()
        utils.do_openstack_upgrade(configs)
        configs.set_release.assert_called_with(openstack_release='havana')
        self.assertTrue(self.log.called)
        self.apt_update.assert_called_with(fatal=True)
        dpkg_opts = [
            '--option', 'Dpkg::Options::=--force-confnew',
            '--option', 'Dpkg::Options::=--force-confdef',
        ]
        self.apt_install.assert_called_with(
            packages=utils.CEILOMETER_AGENT_PACKAGES,
            options=dpkg_opts, fatal=True
        )
        self.configure_installation_source.assert_called_with(
            'cloud:precise-havana'
        )

    def test_assess_status(self):
        with patch.object(utils, 'assess_status_func') as asf:
            callee = MagicMock()
            asf.return_value = callee
            utils.assess_status('test-config')
            asf.assert_called_once_with('test-config')
            callee.assert_called_once_with()

    @patch.object(utils, 'REQUIRED_INTERFACES')
    @patch.object(utils, 'services')
    @patch.object(utils, 'make_assess_status_func')
    def test_assess_status_func(self,
                                make_assess_status_func,
                                services,
                                REQUIRED_INTERFACES):
        services.return_value = 's1'
        utils.assess_status_func('test-config')
        # ports=None whilst port checks are disabled.
        make_assess_status_func.assert_called_once_with(
            'test-config', REQUIRED_INTERFACES, services='s1', ports=None)

    def test_pause_unit_helper(self):
        with patch.object(utils, '_pause_resume_helper') as prh:
            utils.pause_unit_helper('random-config')
            prh.assert_called_once_with(utils.pause_unit, 'random-config')
        with patch.object(utils, '_pause_resume_helper') as prh:
            utils.resume_unit_helper('random-config')
            prh.assert_called_once_with(utils.resume_unit, 'random-config')

    @patch.object(utils, 'services')
    def test_pause_resume_helper(self, services):
        f = MagicMock()
        services.return_value = 's1'
        with patch.object(utils, 'assess_status_func') as asf:
            asf.return_value = 'assessor'
            utils._pause_resume_helper(f, 'some-config')
            asf.assert_called_once_with('some-config')
            # ports=None whilst port checks are disabled.
            f.assert_called_once_with('assessor', services='s1', ports=None)