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# Copyright 2010 United States Government as represented by the
# Administrator of the National Aeronautics and Space Administration.
# 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.

"""
WSGI middleware for OpenStack Compute API.
"""

import nova.api.openstack
from nova.api.openstack.compute import consoles
from nova.api.openstack.compute import extensions
from nova.api.openstack.compute import flavors
from nova.api.openstack.compute import image_metadata
from nova.api.openstack.compute import images
from nova.api.openstack.compute import ips
from nova.api.openstack.compute import limits
from nova.api.openstack.compute import server_metadata
from nova.api.openstack.compute import servers
from nova.api.openstack.compute import versions
from nova import flags
from nova.openstack.common import cfg
from nova.openstack.common import log as logging


LOG = logging.getLogger(__name__)

allow_instance_snapshots_opt = cfg.BoolOpt('allow_instance_snapshots',
        default=True,
        help='Permit instance snapshot operations.')

FLAGS = flags.FLAGS
FLAGS.register_opt(allow_instance_snapshots_opt)


class APIRouter(nova.api.openstack.APIRouter):
    """
    Routes requests on the OpenStack API to the appropriate controller
    and method.
    """
    ExtensionManager = extensions.ExtensionManager

    def _setup_routes(self, mapper):
        self.resources['versions'] = versions.create_resource()
        mapper.connect("versions", "/",
                    controller=self.resources['versions'],
                    action='show')

        mapper.redirect("", "/")

        self.resources['consoles'] = consoles.create_resource()
        mapper.resource("console", "consoles",
                    controller=self.resources['consoles'],
                    parent_resource=dict(member_name='server',
                    collection_name='servers'))

        self.resources['servers'] = servers.create_resource()
        mapper.resource("server", "servers",
                        controller=self.resources['servers'],
                        collection={'detail': 'GET'},
                        member={'action': 'POST'})

        self.resources['ips'] = ips.create_resource()
        mapper.resource("ip", "ips", controller=self.resources['ips'],
                        parent_resource=dict(member_name='server',
                                             collection_name='servers'))

        self.resources['images'] = images.create_resource()
        mapper.resource("image", "images",
                        controller=self.resources['images'],
                        collection={'detail': 'GET'})

        self.resources['limits'] = limits.create_resource()
        mapper.resource("limit", "limits",
                        controller=self.resources['limits'])

        self.resources['flavors'] = flavors.create_resource()
        mapper.resource("flavor", "flavors",
                        controller=self.resources['flavors'],
                        collection={'detail': 'GET'})

        self.resources['image_metadata'] = image_metadata.create_resource()
        image_metadata_controller = self.resources['image_metadata']

        mapper.resource("image_meta", "metadata",
                        controller=image_metadata_controller,
                        parent_resource=dict(member_name='image',
                        collection_name='images'))

        mapper.connect("metadata", "/{project_id}/images/{image_id}/metadata",
                       controller=image_metadata_controller,
                       action='update_all',
                       conditions={"method": ['PUT']})

        self.resources['server_metadata'] = server_metadata.create_resource()
        server_metadata_controller = self.resources['server_metadata']

        mapper.resource("server_meta", "metadata",
                        controller=server_metadata_controller,
                        parent_resource=dict(member_name='server',
                        collection_name='servers'))

        mapper.connect("metadata",
                       "/{project_id}/servers/{server_id}/metadata",
                       controller=server_metadata_controller,
                       action='update_all',
                       conditions={"method": ['PUT']})
