# vim: tabstop=4 shiftwidth=4 softtabstop=4

# Copyright 2011 OpenStack LLC.
# 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.

"""
Tests For misc util methods used with compute.
"""

from nova import db
from nova import flags
from nova import context
from nova import test
from nova import log as logging
from nova import utils
import nova.image.fake
from nova.compute import utils as compute_utils
from nova.compute import instance_types
from nova.notifier import test_notifier
from nova.tests import fake_network


LOG = logging.getLogger(__name__)
FLAGS = flags.FLAGS
flags.DECLARE('stub_network', 'nova.compute.manager')


class UsageInfoTestCase(test.TestCase):

    def setUp(self):
        def fake_get_nw_info(cls, ctxt, instance):
            self.assertTrue(ctxt.is_admin)
            return fake_network.fake_get_instance_nw_info(self.stubs, 1, 1,
                                                          spectacular=True)

        super(UsageInfoTestCase, self).setUp()
        self.stubs.Set(nova.network.API, 'get_instance_nw_info',
                       fake_get_nw_info)

        self.flags(connection_type='fake',
                   stub_network=True,
                   notification_driver='nova.notifier.test_notifier',
                   network_manager='nova.network.manager.FlatManager')
        self.compute = utils.import_object(FLAGS.compute_manager)
        self.user_id = 'fake'
        self.project_id = 'fake'
        self.context = context.RequestContext(self.user_id, self.project_id)
        test_notifier.NOTIFICATIONS = []

        def fake_show(meh, context, id):
            return {'id': 1, 'properties': {'kernel_id': 1, 'ramdisk_id': 1}}

        self.stubs.Set(nova.image.fake._FakeImageService, 'show', fake_show)

    def _create_instance(self, params={}):
        """Create a test instance"""
        inst = {}
        inst['image_ref'] = 1
        inst['reservation_id'] = 'r-fakeres'
        inst['launch_time'] = '10'
        inst['user_id'] = self.user_id
        inst['project_id'] = self.project_id
        type_id = instance_types.get_instance_type_by_name('m1.tiny')['id']
        inst['instance_type_id'] = type_id
        inst['ami_launch_index'] = 0
        inst['root_gb'] = 0
        inst['ephemeral_gb'] = 0
        inst.update(params)
        return db.instance_create(self.context, inst)['id']

    def test_notify_usage_exists(self):
        """Ensure 'exists' notification generates apropriate usage data."""
        instance_id = self._create_instance()
        instance = db.instance_get(self.context, instance_id)
        compute_utils.notify_usage_exists(instance)
        self.assertEquals(len(test_notifier.NOTIFICATIONS), 1)
        msg = test_notifier.NOTIFICATIONS[0]
        self.assertEquals(msg['priority'], 'INFO')
        self.assertEquals(msg['event_type'], 'compute.instance.exists')
        payload = msg['payload']
        self.assertEquals(payload['tenant_id'], self.project_id)
        self.assertEquals(payload['user_id'], self.user_id)
        self.assertEquals(payload['instance_id'], instance.uuid)
        self.assertEquals(payload['instance_type'], 'm1.tiny')
        type_id = instance_types.get_instance_type_by_name('m1.tiny')['id']
        self.assertEquals(str(payload['instance_type_id']), str(type_id))
        for attr in ('display_name', 'created_at', 'launched_at',
                     'state', 'state_description',
                     'bandwidth', 'audit_period_beginning',
                     'audit_period_ending'):
            self.assertTrue(attr in payload,
                            msg="Key %s not in payload" % attr)
        image_ref_url = "%s/images/1" % utils.generate_glance_url()
        self.assertEquals(payload['image_ref_url'], image_ref_url)
        self.compute.terminate_instance(self.context, instance['uuid'])
