# Copyright 2013 Huawei Technologies Co., Ltd
# 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 cinder.api.contrib.quota_classes.py
"""


from unittest import mock

from cinder.api.contrib import quota_classes
from cinder import context
from cinder import db
from cinder import exception
from cinder import quota
from cinder.tests.unit import fake_constants as fake
from cinder.tests.unit import test
from cinder.volume import volume_types


QUOTAS = quota.QUOTAS
GROUP_QUOTAS = quota.GROUP_QUOTAS


def make_body(root=True, gigabytes=1000, snapshots=10,
              volumes=10, backups=10,
              backup_gigabytes=1000, per_volume_gigabytes=-1,
              volume_types_faked=None,
              tenant_id=fake.PROJECT_ID, groups=10):
    resources = {'gigabytes': gigabytes,
                 'snapshots': snapshots,
                 'volumes': volumes,
                 'backups': backups,
                 'per_volume_gigabytes': per_volume_gigabytes,
                 'backup_gigabytes': backup_gigabytes,
                 'groups': groups}
    if not volume_types_faked:
        volume_types_faked = {'fake_type': None}
    for volume_type in volume_types_faked:
        resources['gigabytes_' + volume_type] = -1
        resources['snapshots_' + volume_type] = -1
        resources['volumes_' + volume_type] = -1

    # need to consider preexisting volume types as well
    volume_types = db.volume_type_get_all(context.get_admin_context())

    for volume_type in volume_types:
        resources['gigabytes_' + volume_type] = -1
        resources['snapshots_' + volume_type] = -1
        resources['volumes_' + volume_type] = -1

    if tenant_id:
        resources['id'] = tenant_id
    if root:
        result = {'quota_class_set': resources}
    else:
        result = resources
    return result


def make_response_body(root=True, ctxt=None, quota_class='foo',
                       request_body=None, tenant_id=fake.PROJECT_ID):
    resources = {}
    if not ctxt:
        ctxt = context.get_admin_context()
    resources.update(QUOTAS.get_class_quotas(ctxt, quota_class))
    resources.update(GROUP_QUOTAS.get_class_quotas(ctxt, quota_class))
    if not request_body and not request_body['quota_class_set']:
        resources.update(request_body['quota_class_set'])

    if tenant_id:
        resources['id'] = tenant_id
    if root:
        result = {'quota_class_set': resources}
    else:
        result = resources
    return result


class QuotaClassSetsControllerTest(test.TestCase):

    def setUp(self):
        super(QuotaClassSetsControllerTest, self).setUp()
        self.controller = quota_classes.QuotaClassSetsController()

        self.ctxt = context.get_admin_context()
        self.req = mock.Mock()
        self.req.environ = {'cinder.context': self.ctxt}
        self.req.environ['cinder.context'].is_admin = True

    def test_show(self):
        volume_types.create(self.ctxt, 'fake_type')
        result = self.controller.show(self.req, fake.PROJECT_ID)
        self.assertDictEqual(make_body(), result)

    def test_show_not_authorized(self):
        self.req.environ['cinder.context'].is_admin = False
        self.req.environ['cinder.context'].user_id = fake.USER_ID
        self.req.environ['cinder.context'].project_id = fake.PROJECT_ID
        self.assertRaises(exception.PolicyNotAuthorized, self.controller.show,
                          self.req, fake.PROJECT_ID)

    def test_update(self):
        volume_types.create(self.ctxt, 'fake_type')
        body = make_body(gigabytes=2000, snapshots=15,
                         volumes=5, tenant_id=None)
        result = self.controller.update(self.req, fake.PROJECT_ID, body=body)
        self.assertDictEqual(body, result)

    @mock.patch('cinder.api.openstack.wsgi.Controller.validate_string_length')
    def test_update_limit(self, mock_validate):
        volume_types.create(self.ctxt, 'fake_type')
        body = make_body(volumes=5, tenant_id=None)
        result = self.controller.update(self.req, fake.PROJECT_ID, body=body)
        self.assertEqual(5, result['quota_class_set']['volumes'])
        self.assertTrue(mock_validate.called)

    def test_update_wrong_key(self):
        volume_types.create(self.ctxt, 'fake_type')
        body = {'quota_class_set': {'bad': 100}}
        self.assertRaises(exception.InvalidInput, self.controller.update,
                          self.req, fake.PROJECT_ID, body=body)

    def test_update_invalid_key_value(self):
        body = {'quota_class_set': {'gigabytes': "should_be_int"}}
        self.assertRaises(exception.ValidationError, self.controller.update,
                          self.req, fake.PROJECT_ID, body=body)

    def test_update_bad_quota_limit(self):
        body = {'quota_class_set': {'gigabytes': -1000}}
        self.assertRaises(exception.ValidationError, self.controller.update,
                          self.req, fake.PROJECT_ID, body=body)

    def test_update_no_admin(self):
        self.req.environ['cinder.context'].is_admin = False
        volume_types.create(self.ctxt, 'fake_type')
        self.assertRaises(exception.PolicyNotAuthorized,
                          self.controller.update, self.req, fake.PROJECT_ID,
                          body=make_body(tenant_id=None))

    def test_update_with_more_volume_types(self):
        volume_types.create(self.ctxt, 'fake_type_1')
        volume_types.create(self.ctxt, 'fake_type_2')
        body = {'quota_class_set': {'gigabytes_fake_type_1': 1111,
                                    'volumes_fake_type_2': 2222}}
        result = self.controller.update(self.req, fake.PROJECT_ID, body=body)
        self.assertDictEqual(make_response_body(ctxt=self.ctxt,
                                                quota_class=fake.PROJECT_ID,
                                                request_body=body,
                                                tenant_id=None),
                             result)
