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#
# 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 rally_openstack.common import consts
from rally_openstack.common import osclients
from rally_openstack.common.services.storage import block
from rally_openstack.task.cleanup import manager as resource_manager
from rally_openstack.task import context


@context.configure(name="volumes", platform="openstack", order=420)
class VolumeGenerator(context.OpenStackContext):
    """Creates volumes for each tenant."""

    CONFIG_SCHEMA = {
        "type": "object",
        "$schema": consts.JSON_SCHEMA,
        "properties": {
            "size": {
                "type": "integer",
                "minimum": 1
            },
            "type": {
                "oneOf": [{"type": "string",
                           "description": "a string-like type of volume to "
                                          "create."},
                          {"type": "null",
                           "description": "Use default type for volume to "
                                          "create."}]
            },
            "volumes_per_tenant": {
                "type": "integer",
                "minimum": 1
            }
        },
        "required": ["size"],
        "additionalProperties": False
    }

    DEFAULT_CONFIG = {
        "volumes_per_tenant": 1
    }

    def setup(self):
        size = self.config["size"]
        volume_type = self.config.get("type", None)
        volumes_per_tenant = self.config["volumes_per_tenant"]

        for user, tenant_id in self._iterate_per_tenants():
            self.context["tenants"][tenant_id].setdefault("volumes", [])
            clients = osclients.Clients(user["credential"])
            cinder_service = block.BlockStorage(
                clients,
                name_generator=self.generate_random_name,
                atomic_inst=self.atomic_actions())
            for i in range(volumes_per_tenant):
                vol = cinder_service.create_volume(size,
                                                   volume_type=volume_type)
                self.context["tenants"][tenant_id]["volumes"].append(
                    vol._as_dict())

    def cleanup(self):
        resource_manager.cleanup(
            names=["cinder.volumes"],
            users=self.context.get("users", []),
            superclass=self.__class__,
            task_id=self.get_owner_id())
