# Copyright 2016 NTT DATA
#
# 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 oslo_config import cfg
from oslo_middleware import cors
from oslo_policy import opts


def set_lib_defaults():
    """Update default value for configuration options from other namespace.

    Example, oslo lib config options. This is needed for
    config generator tool to pick these default value changes.
    https://docs.openstack.org/oslo.config/latest/cli/
    generator.html#modifying-defaults-from-other-namespaces
    """

    set_middleware_defaults()

    # TODO(gmann): Remove setting the default value of config policy_file
    # once oslo_policy change the default value to 'policy.yaml'.
    # https://github.com/openstack/oslo.policy/blob/a626ad12fe5a3abd49d70e3e5b95589d279ab578/oslo_policy/opts.py#L49
    opts.set_defaults(cfg.CONF, 'policy.yaml')


def set_middleware_defaults():
    """Update default configuration options for oslo.middleware."""
    # CORS Defaults
    cfg.set_defaults(cors.CORS_OPTS,
                     allow_headers=['X-Auth-Token',
                                    'X-Openstack-Request-Id',
                                    'X-Identity-Status',
                                    'X-Roles',
                                    'X-Service-Catalog',
                                    'X-User-Id',
                                    'X-Tenant-Id'],
                     expose_headers=['X-Auth-Token',
                                     'X-Openstack-Request-Id',
                                     'X-Subject-Token',
                                     'X-Service-Token'],
                     allow_methods=['GET',
                                    'PUT',
                                    'POST',
                                    'DELETE',
                                    'PATCH']
                     )
