#
# Copyright 2015 Reliance Jio Infocomm Ltd
#
# 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 collections import namedtuple

from awsauth import S3Auth
import requests
import six.moves.urllib.parse as urlparse

from ceilometer.i18n import _


class RGWAdminAPIFailed(Exception):
    pass


class RGWAdminClient(object):
    Bucket = namedtuple('Bucket', 'name, num_objects, size')

    def __init__(self, endpoint, access_key, secret_key):
        self.access_key = access_key
        self.secret = secret_key
        self.endpoint = endpoint
        self.hostname = urlparse.urlparse(endpoint).netloc

    def _make_request(self, path, req_params):
        uri = "{0}/{1}".format(self.endpoint, path)
        r = requests.get(uri, params=req_params,
                         auth=S3Auth(self.access_key, self.secret,
                                     self.hostname)
                         )

        if r.status_code != 200:
            raise RGWAdminAPIFailed(
                _('RGW AdminOps API returned %(status)s %(reason)s') %
                {'status': r.status_code, 'reason': r.reason})

        return r.json()

    def get_bucket(self, tenant_id):
        path = "bucket"
        req_params = {"uid": tenant_id, "stats": "true"}
        json_data = self._make_request(path, req_params)
        stats = {'num_buckets': 0, 'buckets': [], 'size': 0, 'num_objects': 0}
        stats['num_buckets'] = len(json_data)
        for it in json_data:
            for k, v in it["usage"].items():
                stats['num_objects'] += v["num_objects"]
                stats['size'] += v["size_kb"]
                stats['buckets'].append(self.Bucket(it["bucket"],
                                        v["num_objects"], v["size_kb"]))
        return stats

    def get_usage(self, tenant_id):
        path = "usage"
        req_params = {"uid": tenant_id}
        json_data = self._make_request(path, req_params)
        usage_data = json_data["summary"]
        return sum((it["total"]["ops"] for it in usage_data))

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Remove unused variable