# 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.


import datetime

import glance.common.exception as glance_exception

from nova.tests.api.openstack import fakes
from nova import context
from nova import exception
from nova.image import glance
from nova import test
from nova.tests.glance import stubs as glance_stubs


class NullWriter(object):
    """Used to test ImageService.get which takes a writer object"""

    def write(self, *arg, **kwargs):
        pass


class TestGlanceSerializer(test.TestCase):
    def test_serialize(self):
        metadata = {'name': 'image1',
                    'is_public': True,
                    'foo': 'bar',
                    'properties': {
                        'prop1': 'propvalue1',
                        'mappings': [
                            {'virtual': 'aaa',
                             'device': 'bbb'},
                            {'virtual': 'xxx',
                             'device': 'yyy'}],
                        'block_device_mapping': [
                            {'virtual_device': 'fake',
                             'device_name': '/dev/fake'},
                            {'virtual_device': 'ephemeral0',
                             'device_name': '/dev/fake0'}]}}

        converted_expected = {
            'name': 'image1',
            'is_public': True,
            'foo': 'bar',
            'properties': {
                'prop1': 'propvalue1',
                'mappings':
                '[{"device": "bbb", "virtual": "aaa"}, '
                '{"device": "yyy", "virtual": "xxx"}]',
                'block_device_mapping':
                '[{"virtual_device": "fake", "device_name": "/dev/fake"}, '
                '{"virtual_device": "ephemeral0", '
                '"device_name": "/dev/fake0"}]'}}
        converted = glance._convert_to_string(metadata)
        self.assertEqual(converted, converted_expected)
        self.assertEqual(glance._convert_from_string(converted), metadata)


class TestGlanceImageService(test.TestCase):
    """
    Tests the Glance image service.

    At a high level, the translations involved are:

        1. Glance -> ImageService - This is needed so we can support
           multple ImageServices (Glance, Local, etc)

        2. ImageService -> API - This is needed so we can support multple
           APIs (OpenStack, EC2)

    """
    NOW_GLANCE_OLD_FORMAT = "2010-10-11T10:30:22"
    NOW_GLANCE_FORMAT = "2010-10-11T10:30:22.000000"
    NOW_DATETIME = datetime.datetime(2010, 10, 11, 10, 30, 22)

    def setUp(self):
        super(TestGlanceImageService, self).setUp()
        fakes.stub_out_compute_api_snapshot(self.stubs)
        client = glance_stubs.StubGlanceClient()
        self.service = glance.GlanceImageService(client=client)
        self.context = context.RequestContext('fake', 'fake', auth_token=True)
        self.service.delete_all()

    @staticmethod
    def _make_fixture(**kwargs):
        fixture = {'name': None,
                   'properties': {},
                   'status': None,
                   'is_public': None}
        fixture.update(kwargs)
        return fixture

    def _make_datetime_fixture(self):
        return self._make_fixture(created_at=self.NOW_GLANCE_FORMAT,
                                  updated_at=self.NOW_GLANCE_FORMAT,
                                  deleted_at=self.NOW_GLANCE_FORMAT)

    def test_create_with_instance_id(self):
        """Ensure instance_id is persisted as an image-property"""
        fixture = {'name': 'test image',
                   'is_public': False,
                   'properties': {'instance_id': '42', 'user_id': 'fake'}}

        image_id = self.service.create(self.context, fixture)['id']
        image_meta = self.service.show(self.context, image_id)