#
# Copyright 2012 eNovance <licensing@enovance.com>
# Copyright 2012 Red Hat, Inc
#
# 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 the compute pollsters.
"""

import mock
from oslotest import base
import six

from ceilometer.agent import manager
from ceilometer.compute.pollsters import util


class FauxInstance(object):

    def __init__(self, **kwds):
        for name, value in kwds.items():
            setattr(self, name, value)

    def __getitem__(self, key):
        return getattr(self, key)

    def get(self, key, default):
        try:
            return getattr(self, key)
        except AttributeError:
            return default


class TestLocationMetadata(base.BaseTestCase):

    @mock.patch('ceilometer.pipeline.setup_pipeline', mock.MagicMock())
    def setUp(self):
        self.manager = manager.AgentManager()
        super(TestLocationMetadata, self).setUp()

        # Mimics an instance returned from nova api call
        self.INSTANCE_PROPERTIES = {'name': 'display name',
                                    'id': ('234cbe81-4e09-4f64-9b2a-'
                                           '714f6b9046e3'),
                                    'OS-EXT-SRV-ATTR:instance_name':
                                    'instance-000001',
                                    'OS-EXT-AZ:availability_zone':
                                    'foo-zone',
                                    'reservation_id': 'reservation id',
                                    'architecture': 'x86_64',
                                    'kernel_id': 'kernel id',
                                    'os_type': 'linux',
                                    'ramdisk_id': 'ramdisk id',
                                    'status': 'active',
                                    'ephemeral_gb': 0,
                                    'root_gb': 20,
                                    'disk_gb': 20,
                                    'image': {'id': 1,
                                              'links': [{"rel": "bookmark",
                                                         'href': 2}]},
                                    'hostId': '1234-5678',
                                    'OS-EXT-SRV-ATTR:host': 'host-test',
                                    'flavor': {'name': 'm1.tiny',
                                               'id': 1,
                                               'disk': 20,
                                               'ram': 512,
                                               'vcpus': 2,
                                               'ephemeral': 0},
                                    'metadata': {'metering.autoscale.group':
                                                 'X' * 512,
                                                 'metering.ephemeral_gb': 42}}

        self.instance = FauxInstance(**self.INSTANCE_PROPERTIES)

    def test_metadata(self):
        md = util._get_metadata_from_object(self.instance)
        for prop, value in six.iteritems(self.INSTANCE_PROPERTIES):
            if prop not in ("metadata"):
                # Special cases
                if prop == 'name':
                    prop = 'display_name'
                elif prop == 'hostId':
                    prop = "host"
                elif prop == 'OS-EXT-SRV-ATTR:host':
                    prop = "instance_host"
                elif prop == 'OS-EXT-SRV-ATTR:instance_name':
                    prop = 'name'
                elif prop == "id":
                    prop = "instance_id"
                self.assertEqual(value, md[prop])
        user_metadata = md['user_metadata']
        expected = self.INSTANCE_PROPERTIES[
            'metadata']['metering.autoscale.group'][:256]
        self.assertEqual(expected, user_metadata['autoscale_group'])
        self.assertEqual(1, len(user_metadata))

    def test_metadata_empty_image(self):
        self.INSTANCE_PROPERTIES['image'] = None
        self.instance = FauxInstance(**self.INSTANCE_PROPERTIES)
        md = util._get_metadata_from_object(self.instance)
        self.assertIsNone(md['image'])
        self.assertIsNone(md['image_ref'])
        self.assertIsNone(md['image_ref_url'])

    def test_metadata_image_through_conductor(self):
        # There should be no links here, should default to None
        self.INSTANCE_PROPERTIES['image'] = {'id': 1}
        self.instance = FauxInstance(**self.INSTANCE_PROPERTIES)
        md = util._get_metadata_from_object(self.instance)
        self.assertEqual(1, md['image_ref'])
        self.assertIsNone(md['image_ref_url'])
