#    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.

# This file handles all flask-restful resources for /v3/registered_limits

import flask
from six.moves import http_client

from keystone.common import json_home
from keystone.common import provider_api
from keystone.common import rbac_enforcer
from keystone.common import validation
from keystone.limit import schema
from keystone.server import flask as ks_flask


PROVIDERS = provider_api.ProviderAPIs
ENFORCER = rbac_enforcer.RBACEnforcer


class RegisteredLimitResource(ks_flask.ResourceBase):
    collection_key = 'registered_limits'
    member_key = 'registered_limit'
    json_home_resource_status = json_home.Status.EXPERIMENTAL

    def _get_registered_limit(self, registered_limit_id):
        ENFORCER.enforce_call(action='identity:get_registered_limit')
        ref = PROVIDERS.unified_limit_api.get_registered_limit(
            registered_limit_id)
        return self.wrap_member(ref)

    def _list_registered_limits(self):
        filters = ['service_id', 'region_id', 'resource_name']
        ENFORCER.enforce_call(action='identity:list_registered_limits',
                              filters=filters)
        hints = self.build_driver_hints(filters)
        refs = PROVIDERS.unified_limit_api.list_registered_limits(hints)
        return self.wrap_collection(refs)

    def get(self, registered_limit_id=None):
        if registered_limit_id is not None:
            return self._get_registered_limit(registered_limit_id)
        return self._list_registered_limits()

    def post(self):
        ENFORCER.enforce_call(action='identity:create_registered_limits')
        reg_limits = (flask.request.get_json(
            silent=True, force=True) or {}).get('registered_limits', {})
        validation.lazy_validate(schema.registered_limit_create, reg_limits)
        registered_limits = [self._assign_unique_id(self._normalize_dict(r))
                             for r in reg_limits]
        refs = PROVIDERS.unified_limit_api.create_registered_limits(
            registered_limits)
        refs = self.wrap_collection(refs)
        refs.pop('links')
        return refs, http_client.CREATED

    def patch(self, registered_limit_id):
        ENFORCER.enforce_call(action='identity:update_registered_limit')
        registered_limit = (flask.request.get_json(
            silent=True, force=True) or {}).get('registered_limit', {})
        validation.lazy_validate(schema.registered_limit_update,
                                 registered_limit)
        self._require_matching_id(registered_limit)
        ref = PROVIDERS.unified_limit_api.update_registered_limit(
            registered_limit_id, registered_limit)
        return self.wrap_member(ref)

    def delete(self, registered_limit_id):
        ENFORCER.enforce_call(action='identity:delete_registered_limit')
        return (PROVIDERS.unified_limit_api.delete_registered_limit(
            registered_limit_id), http_client.NO_CONTENT)


class RegisteredLimitsAPI(ks_flask.APIBase):
    _name = 'registered_limit'
    _import_name = __name__
    resources = [RegisteredLimitResource]
    resource_mapping = []


APIs = (RegisteredLimitsAPI,)