# 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.

import sys

from mock import patch, MagicMock

# python-apt is not installed as part of test-requirements but is imported by
# some charmhelpers modules so create a fake import.
sys.modules['apt'] = MagicMock()
sys.modules['apt_pkg'] = MagicMock()

with patch('charmhelpers.contrib.hardening.harden.harden') as mock_dec:
    mock_dec.side_effect = (lambda *dargs, **dkwargs: lambda f:
                            lambda *args, **kwargs: f(*args, **kwargs))
    with patch('charmhelpers.contrib.openstack.utils.get_os_codename_package'):
        with patch('nova_cc_utils.restart_map'):
            with patch('nova_cc_utils.register_configs'):
                with patch('nova_cc_utils.guard_map') as gmap:
                    with patch('charmhelpers.core.hookenv.config') as config:
                        config.return_value = False
                        gmap.return_value = {}
                        import git_reinstall

from test_utils import CharmTestCase

TO_PATCH = [
    'config',
]


openstack_origin_git = \
    """repositories:
         - {name: requirements,
            repository: 'git://git.openstack.org/openstack/requirements',
            branch: stable/juno}
         - {name: nova,
            repository: 'git://git.openstack.org/openstack/nova',
            branch: stable/juno}"""


class TestnovaAPIActions(CharmTestCase):

    def setUp(self):
        super(TestnovaAPIActions, self).setUp(git_reinstall, TO_PATCH)
        self.config.side_effect = self.test_config.get

    @patch.object(git_reinstall, 'action_set')
    @patch.object(git_reinstall, 'action_fail')
    @patch.object(git_reinstall, 'git_install')
    @patch.object(git_reinstall, 'config_changed')
    @patch('charmhelpers.contrib.openstack.utils.config')
    def test_git_reinstall(self, _config, config_changed, git_install,
                           action_fail, action_set):
        _config.side_effect = self.test_config.get
        self.test_config.set('openstack-origin-git', openstack_origin_git)

        git_reinstall.git_reinstall()

        git_install.assert_called_with(openstack_origin_git)
        self.assertTrue(git_install.called)
        self.assertTrue(config_changed.called)
        self.assertFalse(action_set.called)
        self.assertFalse(action_fail.called)

    @patch.object(git_reinstall, 'action_set')
    @patch.object(git_reinstall, 'action_fail')
    @patch.object(git_reinstall, 'git_install')
    @patch.object(git_reinstall, 'config_changed')
    @patch('charmhelpers.contrib.openstack.utils.config')
    def test_git_reinstall_not_configured(self, _config, config_changed,
                                          git_install, action_fail,
                                          action_set):
        _config.return_value = None

        git_reinstall.git_reinstall()

        msg = 'openstack-origin-git is not configured'
        action_fail.assert_called_with(msg)
        self.assertFalse(git_install.called)
        self.assertFalse(action_set.called)

    @patch.object(git_reinstall, 'action_set')
    @patch.object(git_reinstall, 'action_fail')
    @patch.object(git_reinstall, 'git_install')
    @patch.object(git_reinstall, 'config_changed')
    @patch('traceback.format_exc')
    @patch('charmhelpers.contrib.openstack.utils.config')
    def test_git_reinstall_exception(self, _config, format_exc,
                                     config_changed, git_install, action_fail,
                                     action_set):
        _config.return_value = openstack_origin_git
        e = OSError('something bad happened')
        git_install.side_effect = e
        traceback = (
            "Traceback (most recent call last):\n"
            "  File \"actions/git_reinstall.py\", line 37, in git_reinstall\n"
            "    git_install(config(\'openstack-origin-git\'))\n"
            "  File \"/usr/lib/python2.7/dist-packages/mock.py\", line 964, in __call__\n"  # noqa
            "    return _mock_self._mock_call(*args, **kwargs)\n"
            "  File \"/usr/lib/python2.7/dist-packages/mock.py\", line 1019, in _mock_call\n"  # noqa
            "    raise effect\n"
            "OSError: something bad happened\n")
        format_exc.return_value = traceback

        git_reinstall.git_reinstall()

        msg = 'git-reinstall resulted in an unexpected error'
        action_fail.assert_called_with(msg)
        action_set.assert_called_with({'traceback': traceback})