# Copyright 2012 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.

from lxml import etree
import webob

from cinder.api.openstack.volume.contrib import extended_snapshot_attributes
from cinder import exception
from cinder import flags
from cinder.openstack.common import jsonutils
from cinder import test
from cinder.tests.api.openstack import fakes
from cinder import volume


FLAGS = flags.FLAGS


UUID1 = '00000000-0000-0000-0000-000000000001'
UUID2 = '00000000-0000-0000-0000-000000000002'


def _get_default_snapshot_param():
    return {
        'id': UUID1,
        'volume_id': 12,
        'status': 'available',
        'volume_size': 100,
        'created_at': None,
        'display_name': 'Default name',
        'display_description': 'Default description',
        'project_id': 'fake',
        'progress': '0%'
        }


def fake_snapshot_get(self, context, snapshot_id):
    param = _get_default_snapshot_param()
    return param


def fake_snapshot_get_all(self, context):
    param = _get_default_snapshot_param()
    return [param]


class ExtendedSnapshotAttributesTest(test.TestCase):
    content_type = 'application/json'
    prefix = 'os-extended-snapshot-attributes:'

    def setUp(self):
        super(ExtendedSnapshotAttributesTest, self).setUp()
        self.stubs.Set(volume.api.API, 'get_snapshot', fake_snapshot_get)
        self.stubs.Set(volume.api.API, 'get_all_snapshots',
                       fake_snapshot_get_all)

    def _make_request(self, url):
        req = webob.Request.blank(url)
        req.headers['Accept'] = self.content_type
        res = req.get_response(fakes.wsgi_app())
        return res

    def _get_snapshot(self, body):
        return jsonutils.loads(body).get('snapshot')

    def _get_snapshots(self, body):
        return jsonutils.loads(body).get('snapshots')

    def assertSnapshotAttributes(self, snapshot, project_id, progress):
        self.assertEqual(snapshot.get('%sproject_id' % self.prefix),
                                      project_id)
        self.assertEqual(snapshot.get('%sprogress' % self.prefix), progress)

    def test_show(self):
        url = '/v1/fake/snapshots/%s' % UUID2
        res = self._make_request(url)

        self.assertEqual(res.status_int, 200)
        self.assertSnapshotAttributes(self._get_snapshot(res.body),
                                project_id='fake',
                                progress='0%')

    def test_detail(self):
        url = '/v1/fake/snapshots/detail'
        res = self._make_request(url)

        self.assertEqual(res.status_int, 200)
        for i, snapshot in enumerate(self._get_snapshots(res.body)):
            self.assertSnapshotAttributes(snapshot,
                                    project_id='fake',
                                    progress='0%')

    def test_no_instance_passthrough_404(self):

        def fake_snapshot_get(*args, **kwargs):
            raise exception.InstanceNotFound()

        self.stubs.Set(volume.api.API, 'get_snapshot', fake_snapshot_get)
        url = '/v1/fake/snapshots/70f6db34-de8d-4fbd-aafb-4065bdfa6115'
        res = self._make_request(url)

        self.assertEqual(res.status_int, 404)


class ExtendedSnapshotAttributesXmlTest(ExtendedSnapshotAttributesTest):
    content_type = 'application/xml'
    ext = extended_snapshot_attributes
    prefix = '{%s}' % ext.Extended_snapshot_attributes.namespace

    def _get_snapshot(self, body):
        return etree.XML(body)

    def _get_snapshots(self, body):
        return etree.XML(body).getchildren()
