# Copyright 2014: Kylin Cloud
# 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.

import random

from rally.plugins.openstack import scenario
from rally.task import atomic


class QuotasScenario(scenario.OpenStackScenario):
    """Base class for quotas scenarios with basic atomic actions."""

    @atomic.action_timer("quotas.update_quotas")
    def _update_quotas(self, component, tenant_id, max_quota=1024,
                       quota_update_fn=None):
        """Updates quotas.

        :param component: Component for the quotas.
        :param tenant_id: The project_id for the quotas to be updated.
        :param max_quota: Max value to be updated for quota.
        :param quota_update_fn: Client quota update function.

        Standard OpenStack clients use quotas.update().
        Use `quota_update_fn` to override for non-standard clients.

        :returns: Updated quotas dictionary.
        """
        quotas = self._generate_quota_values(max_quota, component)
        if quota_update_fn:
            return quota_update_fn(tenant_id, **quotas)
        return self.admin_clients(component).quotas.update(tenant_id, **quotas)

    @atomic.action_timer("quotas.delete_quotas")
    def _delete_quotas(self, component, tenant_id):
        """Delete quotas.

        :param component: Component for the quotas.
        :param tenant_id: The project_id for the quotas to be updated.
        """
        self.admin_clients(component).quotas.delete(tenant_id)

    def _generate_quota_values(self, max_quota, component):
        quotas = {}
        if component == "nova":
            quotas = {
                "metadata_items": random.randint(-1, max_quota),
                "key_pairs": random.randint(-1, max_quota),
                "injected_file_content_bytes": random.randint(-1, max_quota),
                "injected_file_path_bytes": random.randint(-1, max_quota),
                "ram": random.randint(-1, max_quota),
                "instances": random.randint(-1, max_quota),
                "injected_files": random.randint(-1, max_quota),
                "cores": random.randint(-1, max_quota)
            }
        elif component == "cinder":
            quotas = {
                "volumes": random.randint(-1, max_quota),
                "snapshots": random.randint(-1, max_quota),
                "gigabytes": random.randint(-1, max_quota),
            }
        elif component == "neutron":
            quota = {}
            for key in ["network", "subnet", "port", "router", "floatingip",
                        "security_group", "security_group_rule"]:
                quota[key] = random.randint(-1, max_quota)
            quotas = {"body": {"quota": quota}}
        return quotas
