#    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 unittest import mock

import fixtures
from oslo_utils.fixture import uuidsentinel as uuids
from oslo_utils import timeutils

from nova.api.openstack.compute import create_backup
from nova.compute import vm_states
from nova.tests.unit.api.openstack import fakes
from nova.tests.unit import fake_instance
from nova.tests.unit.policies import base


class CreateBackupPolicyTest(base.BasePolicyTest):
    """Test Create Backup APIs policies with all possible context.

    This class defines the set of context with different roles
    which are allowed and not allowed to pass the policy checks.
    With those set of context, it will call the API operation and
    verify the expected behaviour.
    """

    def setUp(self):
        super(CreateBackupPolicyTest, self).setUp()
        self.controller = create_backup.CreateBackupController()
        self.req = fakes.HTTPRequest.blank('')
        self.mock_get = self.useFixture(
            fixtures.MockPatch('nova.api.openstack.common.get_instance')).mock
        uuid = uuids.fake_id
        self.instance = fake_instance.fake_instance_obj(
                self.project_member_context, project_id=self.project_id,
                id=1, uuid=uuid, vm_state=vm_states.ACTIVE,
                task_state=None, launched_at=timeutils.utcnow())
        self.mock_get.return_value = self.instance
        # With legacy rule and no scope checks, all admin, project members
        # project reader or other project role(because legacy rule allow server
        # owner- having same project id and no role check) is able to create
        # server backup.
        self.project_member_authorized_contexts = [
            self.legacy_admin_context, self.system_admin_context,
            self.project_admin_context, self.project_member_context,
            self.project_reader_context, self.project_foo_context]

    @mock.patch('nova.compute.api.API.backup')
    def test_create_backup_policy(self, mock_backup):
        rule_name = "os_compute_api:os-create-backup"
        body = {
            'createBackup': {
                'name': 'Backup 1',
                'backup_type': 'daily',
                'rotation': 1,
            },
        }
        self.common_policy_auth(self.project_member_authorized_contexts,
                                rule_name, self.controller._create_backup,
                                self.req, self.instance.uuid,
                                body=body)


class CreateBackupNoLegacyNoScopePolicyTest(CreateBackupPolicyTest):
    """Test Create Backup server APIs policies with no legacy deprecated rules
    and no scope checks.

    """

    without_deprecated_rules = True

    def setUp(self):
        super(CreateBackupNoLegacyNoScopePolicyTest, self).setUp()
        # With no legacy rule, only project admin or member will be
        # able to create the server backup.
        self.project_member_authorized_contexts = (
            self.project_member_or_admin_with_no_scope_no_legacy)


class CreateBackupScopeTypePolicyTest(CreateBackupPolicyTest):
    """Test Create Backup APIs policies with system scope enabled.

    This class set the nova.conf [oslo_policy] enforce_scope to True
    so that we can switch on the scope checking on oslo policy side.
    It defines the set of context with scoped token
    which are allowed and not allowed to pass the policy checks.
    With those set of context, it will run the API operation and
    verify the expected behaviour.
    """

    def setUp(self):
        super(CreateBackupScopeTypePolicyTest, self).setUp()
        self.flags(enforce_scope=True, group="oslo_policy")
        # Scope enable will not allow system users to create the server.
        self.project_member_authorized_contexts = (
            self.project_m_r_or_admin_with_scope_and_legacy)


class CreateBackupScopeTypeNoLegacyPolicyTest(CreateBackupScopeTypePolicyTest):
    """Test Create Backup APIs policies with system scope enabled,
    and no more deprecated rules.
    """
    without_deprecated_rules = True

    def setUp(self):
        super(CreateBackupScopeTypeNoLegacyPolicyTest, self).setUp()
        # With scope enable and no legacy rule, only project admin/member
        # will be able to create the server backup.
        self.project_member_authorized_contexts = (
            self.project_member_or_admin_with_scope_no_legacy)