# Copyright 2012 Nebula, 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.

from lxml import etree
import webob

from nova.compute import instance_types
from nova.openstack.common import jsonutils
from nova import test
from nova.tests.api.openstack import fakes

FAKE_FLAVORS = {
    'flavor 1': {
        "flavorid": '1',
        "name": 'flavor 1',
        "memory_mb": '256',
        "root_gb": '10',
        "rxtx_factor": '1.0',
    },
    'flavor 2': {
        "flavorid": '2',
        "name": 'flavor 2',
        "memory_mb": '512',
        "root_gb": '10',
        "rxtx_factor": None,
    },
}


def fake_instance_type_get_by_flavor_id(flavorid):
    return FAKE_FLAVORS['flavor %s' % flavorid]


def fake_instance_type_get_all(*args, **kwargs):
    return FAKE_FLAVORS


class FlavorRxtxTest(test.TestCase):
    content_type = 'application/json'
    prefix = ''

    def setUp(self):
        super(FlavorRxtxTest, self).setUp()
        ext = ('nova.api.openstack.compute.contrib'
              '.flavor_rxtx.Flavor_rxtx')
        self.flags(osapi_compute_extension=[ext])
        fakes.stub_out_nw_api(self.stubs)
        self.stubs.Set(instance_types, "get_all_types",
                       fake_instance_type_get_all)
        self.stubs.Set(instance_types,
                       "get_instance_type_by_flavor_id",
                       fake_instance_type_get_by_flavor_id)

    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_flavor(self, body):
        return jsonutils.loads(body).get('flavor')

    def _get_flavors(self, body):
        return jsonutils.loads(body).get('flavors')

    def assertFlavorRxtx(self, flavor, rxtx):
        self.assertEqual(str(flavor.get('%srxtx_factor' % self.prefix)), rxtx)

    def test_show(self):
        url = '/v2/fake/flavors/1'
        res = self._make_request(url)

        self.assertEqual(res.status_int, 200)
        self.assertFlavorRxtx(self._get_flavor(res.body), '1.0')

    def test_detail(self):
        url = '/v2/fake/flavors/detail'
        res = self._make_request(url)

        self.assertEqual(res.status_int, 200)
        flavors = self._get_flavors(res.body)
        self.assertFlavorRxtx(flavors[0], '1.0')
        self.assertFlavorRxtx(flavors[1], '')


class FlavorRxtxXmlTest(FlavorRxtxTest):
    content_type = 'application/xml'

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

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