# vim: tabstop=4 shiftwidth=4 softtabstop=4

# Copyright 2011 OpenStack Foundation
# 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.
from reddwarf.common.context import ReddwarfContext

import reddwarf.extensions.mgmt.instances.models as mgmtmodels
import reddwarf.common.cfg as cfg
from reddwarf.common import exception
from reddwarf.openstack.common import log as logging
from reddwarf.openstack.common import importutils
from reddwarf.openstack.common import periodic_task
from reddwarf.taskmanager import models
from reddwarf.taskmanager.models import FreshInstanceTasks

LOG = logging.getLogger(__name__)
RPC_API_VERSION = "1.0"
CONF = cfg.CONF


class Manager(periodic_task.PeriodicTasks):

    def __init__(self):
        super(Manager, self).__init__()
        self.admin_context = ReddwarfContext(
            user=CONF.nova_proxy_admin_user,
            auth_token=CONF.nova_proxy_admin_pass,
            tenant=CONF.nova_proxy_admin_tenant_name)
        if CONF.exists_notification_transformer:
            self.exists_transformer = importutils.import_object(
                CONF.exists_notification_transformer,
                context=self.admin_context)

    def resize_volume(self, context, instance_id, new_size):
        instance_tasks = models.BuiltInstanceTasks.load(context, instance_id)
        instance_tasks.resize_volume(new_size)

    def resize_flavor(self, context, instance_id, new_flavor_id,
                      old_memory_size, new_memory_size):
        instance_tasks = models.BuiltInstanceTasks.load(context, instance_id)
        instance_tasks.resize_flavor(new_flavor_id, old_memory_size,
                                     new_memory_size)

    def reboot(self, context, instance_id):
        instance_tasks = models.BuiltInstanceTasks.load(context, instance_id)
        instance_tasks.reboot()

    def restart(self, context, instance_id):
        instance_tasks = models.BuiltInstanceTasks.load(context, instance_id)
        instance_tasks.restart()

    def migrate(self, context, instance_id):
        instance_tasks = models.BuiltInstanceTasks.load(context, instance_id)
        instance_tasks.migrate()

    def delete_instance(self, context, instance_id):
        try:
            instance_tasks = models.BuiltInstanceTasks.load(context,
                                                            instance_id)
            instance_tasks.delete_async()
        except exception.UnprocessableEntity as upe:
            instance_tasks = models.FreshInstanceTasks.load(context,
                                                            instance_id)
            instance_tasks.delete_async()

    def delete_backup(self, context, backup_id):
        models.BackupTasks.delete_backup(context, backup_id)

    def create_backup(self, context, backup_id, instance_id):
        instance_tasks = models.BuiltInstanceTasks.load(context, instance_id)
        instance_tasks.create_backup(backup_id)

    def create_instance(self, context, instance_id, name, flavor_id,
                        flavor_ram, image_id, databases, users, service_type,
                        volume_size, security_groups, backup_id):
        instance_tasks = FreshInstanceTasks.load(context, instance_id)
        instance_tasks.create_instance(flavor_id, flavor_ram, image_id,
                                       databases, users, service_type,
                                       volume_size, security_groups,
                                       backup_id)

    if CONF.exists_notification_transformer:
        @periodic_task.periodic_task(
            ticks_between_runs=CONF.exists_notification_ticks)
        def publish_exists_event(self, context):
            """
            Push this in Instance Tasks to fetch a report/collection
            :param context: currently None as specied in bin script
            """
            mgmtmodels.publish_exist_events(self.exists_transformer,
                                            self.admin_context)