#   Copyright 2014 OpenStack Foundation
#
#   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 oslo_config import cfg

from nova.api.openstack import common
from nova.api.openstack.compute.legacy_v2.contrib import rescue
from nova.api.openstack import extensions
from nova import compute
import nova.context as context
from nova import test

CONF = cfg.CONF
CONF.import_opt('password_length', 'nova.utils')


class FakeRequest(object):
    def __init__(self, context):
        self.environ = {"nova.context": context}


class ExtendedRescueWithImageTest(test.NoDBTestCase):
    def setUp(self):
        super(ExtendedRescueWithImageTest, self).setUp()
        ext_mgr = extensions.ExtensionManager()
        ext_mgr.extensions = {'os-extended-rescue-with-image': 'fake'}
        self.controller = rescue.RescueController(ext_mgr)

    @mock.patch.object(common, 'get_instance',
                       return_value="instance")
    @mock.patch.object(compute.api.API, "rescue")
    def _make_rescue_request_with_image_ref(self, body, mock_rescue,
                                            mock_get_instance):
        instance = "instance"
        self.controller._get_instance = mock.Mock(return_value=instance)
        fake_context = context.RequestContext('fake', 'fake')
        req = FakeRequest(fake_context)

        self.controller._rescue(req, "id", body)
        rescue_image_ref = body["rescue"].get("rescue_image_ref")
        mock_rescue.assert_called_with(mock.ANY, mock.ANY,
            rescue_password=mock.ANY, rescue_image_ref=rescue_image_ref)

    def test_rescue_with_image_specified(self):
        body = dict(rescue={
            "rescue_image_ref": "76fa36fc-c930-4bf3-8c8a-ea2a2420deb6"})
        self._make_rescue_request_with_image_ref(body)

    def test_rescue_without_image_specified(self):
        body = dict(rescue={})
        self._make_rescue_request_with_image_ref(body)
