# Copyright 2012, Intel, Inc.
#
#    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 typing import Optional, Union

from cinder.common import constants
from cinder import context
from cinder import objects
from cinder import quota
from cinder import rpc
from cinder.volume import volume_utils


QUOTAS = quota.QUOTAS


class VolumeAPI(rpc.RPCAPI):
    """Client side of the volume rpc API.

    API version history:

    .. code-block:: none

        1.0 - Initial version.
        1.1 - Adds clone volume option to create_volume.
        1.2 - Add publish_service_capabilities() method.
        1.3 - Pass all image metadata (not just ID) in copy_volume_to_image.
        1.4 - Add request_spec, filter_properties and
              allow_reschedule arguments to create_volume().
        1.5 - Add accept_transfer.
        1.6 - Add extend_volume.
        1.7 - Adds host_name parameter to attach_volume()
              to allow attaching to host rather than instance.
        1.8 - Add migrate_volume, rename_volume.
        1.9 - Add new_user and new_project to accept_transfer.
        1.10 - Add migrate_volume_completion, remove rename_volume.
        1.11 - Adds mode parameter to attach_volume()
               to support volume read-only attaching.
        1.12 - Adds retype.
        1.13 - Adds create_export.
        1.14 - Adds reservation parameter to extend_volume().
        1.15 - Adds manage_existing and unmanage_only flag to delete_volume.
        1.16 - Removes create_export.
        1.17 - Add replica option to create_volume, promote_replica and
               sync_replica.
        1.18 - Adds create_consistencygroup, delete_consistencygroup,
               create_cgsnapshot, and delete_cgsnapshot. Also adds
               the consistencygroup_id parameter in create_volume.
        1.19 - Adds update_migrated_volume
        1.20 - Adds support for sending objects over RPC in create_snapshot()
               and delete_snapshot()
        1.21 - Adds update_consistencygroup.
        1.22 - Adds create_consistencygroup_from_src.
        1.23 - Adds attachment_id to detach_volume.
        1.24 - Removed duplicated parameters: snapshot_id, image_id,
               source_volid, source_replicaid, consistencygroup_id and
               cgsnapshot_id from create_volume. All off them are already
               passed either in request_spec or available in the DB.
        1.25 - Add source_cg to create_consistencygroup_from_src.
        1.26 - Adds support for sending objects over RPC in
               create_consistencygroup(), create_consistencygroup_from_src(),
               update_consistencygroup() and delete_consistencygroup().
        1.27 - Adds support for replication V2
        1.28 - Adds manage_existing_snapshot
        1.29 - Adds get_capabilities.
        1.30 - Adds remove_export
        1.31 - Updated: create_consistencygroup_from_src(), create_cgsnapshot()
               and delete_cgsnapshot() to cast method only with necessary
               args. Forwarding CGSnapshot object instead of CGSnapshot_id.
        1.32 - Adds support for sending objects over RPC in create_volume().
        1.33 - Adds support for sending objects over RPC in delete_volume().
        1.34 - Adds support for sending objects over RPC in retype().
        1.35 - Adds support for sending objects over RPC in extend_volume().
        1.36 - Adds support for sending objects over RPC in migrate_volume(),
               migrate_volume_completion(), and update_migrated_volume().
        1.37 - Adds old_reservations parameter to retype to support quota
               checks in the API.
        1.38 - Scaling backup service, add get_backup_device() and
               secure_file_operations_enabled()
        1.39 - Update replication methods to reflect new backend rep strategy
        1.40 - Add cascade option to delete_volume().

        ... Mitaka supports messaging version 1.40. Any changes to existing
        methods in 1.x after that point should be done so that they can handle
        the version_cap being set to 1.40.

        2.0  - Remove 1.x compatibility
        2.1  - Add get_manageable_volumes() and get_manageable_snapshots().
        2.2  - Adds support for sending objects over RPC in manage_existing().
        2.3  - Adds support for sending objects over RPC in
               initialize_connection().
        2.4  - Sends request_spec as object in create_volume().
        2.5  - Adds create_group, delete_group, and update_group
        2.6  - Adds create_group_snapshot, delete_group_snapshot, and
               create_group_from_src().

        ... Newton supports messaging version 2.6. Any changes to existing
        methods in 2.x after that point should be done so that they can handle
        the version_cap being set to 2.6.

        3.0  - Drop 2.x compatibility
        3.1  - Remove promote_replica and reenable_replication. This is
               non-backward compatible, but the user-facing API was removed
               back in Mitaka when introducing cheesecake replication.
        3.2  - Adds support for sending objects over RPC in
               get_backup_device().
        3.3  - Adds support for sending objects over RPC in attach_volume().
        3.4  - Adds support for sending objects over RPC in detach_volume().
        3.5  - Adds support for cluster in retype and migrate_volume
        3.6  - Switch to use oslo.messaging topics to indicate backends instead
               of @backend suffixes in server names.
        3.7  - Adds do_cleanup method to do volume cleanups from other nodes
               that we were doing in init_host.
        3.8  - Make failover_host cluster aware and add failover_completed.
        3.9  - Adds new attach/detach methods
        3.10 - Returning objects instead of raw dictionaries in
               get_manageable_volumes & get_manageable_snapshots
        3.11 - Removes create_consistencygroup, delete_consistencygroup,
               create_cgsnapshot, delete_cgsnapshot, update_consistencygroup,
               and create_consistencygroup_from_src.
        3.12 - Adds set_log_levels and get_log_levels
        3.13 - Add initialize_connection_snapshot,
               terminate_connection_snapshot, and remove_export_snapshot.
        3.14 - Adds enable_replication, disable_replication,
               failover_replication, and list_replication_targets.
        3.15 - Add revert_to_snapshot method
        3.16 - Add no_snapshots to accept_transfer method
        3.17 - Make get_backup_device a cast (async)
        3.18 - Add reimage method
        3.19 - Add extend_volume_completion method
    """

    RPC_API_VERSION = '3.19'
    RPC_DEFAULT_VERSION = '3.0'
    TOPIC = constants.VOLUME_TOPIC
    BINARY = constants.VOLUME_BINARY

    def _get_cctxt(self,
                   host: Optional[str] = None,
                   version: Optional[Union[str, tuple[str, ...]]] = None,
                   **kwargs) -> rpc.RPCAPI:
        if host:
            server = volume_utils.extract_host(host)

            # TODO(dulek): If we're pinned before 3.6, we should send stuff the
            # old way - addressing server=host@backend, topic=cinder-volume.
            # Otherwise we're addressing server=host,
            # topic=cinder-volume.host@backend. This conditional can go away
            # when we stop supporting 3.x.
            if self.client.can_send_version('3.6'):
                kwargs['topic'] = '%(topic)s.%(host)s' % {'topic': self.TOPIC,
                                                          'host': server}
                server = volume_utils.extract_host(server, 'host')
            kwargs['server'] = server

        return super(VolumeAPI, self)._get_cctxt(version=version, **kwargs)

    def create_volume(self,
                      ctxt: context.RequestContext,
                      volume: 'objects.Volume',
                      request_spec: Optional[dict],
                      filter_properties: Optional[dict],
                      allow_reschedule: bool = True) -> None:
        cctxt = self._get_cctxt(volume.service_topic_queue)
        cctxt.cast(ctxt, 'create_volume',
                   request_spec=request_spec,
                   filter_properties=filter_properties,
                   allow_reschedule=allow_reschedule,
                   volume=volume)

    @rpc.assert_min_rpc_version('3.15')
    def revert_to_snapshot(self, ctxt, volume, snapshot):
        version = self._compat_ver('3.15')
        cctxt = self._get_cctxt(volume.service_topic_queue, version)
        cctxt.cast(ctxt, 'revert_to_snapshot', volume=volume,
                   snapshot=snapshot)

    def delete_volume(self,
                      ctxt: context.RequestContext,
                      volume: 'objects.Volume',
                      unmanage_only: bool = False,
                      cascade: bool = False) -> None:
        volume.create_worker()
        cctxt = self._get_cctxt(volume.service_topic_queue)
        msg_args = {
            'volume': volume, 'unmanage_only': unmanage_only,
            'cascade': cascade,
        }

        cctxt.cast(ctxt, 'delete_volume', **msg_args)

    def create_snapshot(self,
                        ctxt: context.RequestContext,
                        volume: 'objects.Volume',
                        snapshot: 'objects.Snapshot') -> None:
        snapshot.create_worker()
        cctxt = self._get_cctxt(volume.service_topic_queue)
        cctxt.cast(ctxt, 'create_snapshot', snapshot=snapshot)

    def delete_snapshot(self, ctxt, snapshot, unmanage_only=False):
        cctxt = self._get_cctxt(snapshot.service_topic_queue)
        cctxt.cast(ctxt, 'delete_snapshot', snapshot=snapshot,
                   unmanage_only=unmanage_only)

    def attach_volume(self, ctxt, volume, instance_uuid, host_name,
                      mountpoint, mode):
        msg_args = {'volume_id': volume.id,
                    'instance_uuid': instance_uuid,
                    'host_name': host_name,
                    'mountpoint': mountpoint,
                    'mode': mode,
                    'volume': volume}
        cctxt = self._get_cctxt(volume.service_topic_queue, ('3.3', '3.0'))
        if not cctxt.can_send_version('3.3'):
            msg_args.pop('volume')
        return cctxt.call(ctxt, 'attach_volume', **msg_args)

    def detach_volume(self, ctxt, volume, attachment_id):
        msg_args = {'volume_id': volume.id,
                    'attachment_id': attachment_id,
                    'volume': volume}
        cctxt = self._get_cctxt(volume.service_topic_queue, ('3.4', '3.0'))
        if not self.client.can_send_version('3.4'):
            msg_args.pop('volume')
        return cctxt.call(ctxt, 'detach_volume', **msg_args)

    def copy_volume_to_image(self, ctxt, volume, image_meta):
        cctxt = self._get_cctxt(volume.service_topic_queue)
        cctxt.cast(ctxt, 'copy_volume_to_image', volume_id=volume['id'],
                   image_meta=image_meta)

    def initialize_connection(self, ctxt, volume, connector):
        cctxt = self._get_cctxt(volume.service_topic_queue)
        return cctxt.call(ctxt, 'initialize_connection', connector=connector,
                          volume=volume)

    def terminate_connection(self, ctxt, volume, connector, force=False):
        cctxt = self._get_cctxt(volume.service_topic_queue)
        return cctxt.call(ctxt, 'terminate_connection', volume_id=volume['id'],
                          connector=connector, force=force)

    def remove_export(self, ctxt, volume, sync=False):
        cctxt = self._get_cctxt(volume.service_topic_queue)
        if sync:
            cctxt.call(ctxt, 'remove_export', volume_id=volume.id)
        else:
            cctxt.cast(ctxt, 'remove_export', volume_id=volume.id)

    def publish_service_capabilities(self, ctxt):
        cctxt = self._get_cctxt(fanout=True)
        cctxt.cast(ctxt, 'publish_service_capabilities')

    def accept_transfer(self, ctxt, volume, new_user, new_project,
                        no_snapshots=False):
        msg_args = {'volume_id': volume['id'],
                    'new_user': new_user,
                    'new_project': new_project,
                    'no_snapshots': no_snapshots
                    }
        cctxt = self._get_cctxt(volume.service_topic_queue, ('3.16', '3.0'))
        if not self.client.can_send_version('3.16'):
            msg_args.pop('no_snapshots')
        return cctxt.call(ctxt, 'accept_transfer', **msg_args)

    def extend_volume(self, ctxt, volume, new_size, reservations):
        cctxt = self._get_cctxt(volume.service_topic_queue)
        cctxt.cast(ctxt, 'extend_volume', volume=volume, new_size=new_size,
                   reservations=reservations)

    @rpc.assert_min_rpc_version('3.19')
    def extend_volume_completion(self, ctxt, volume, new_size, reservations,
                                 error):
        cctxt = self._get_cctxt(volume.service_topic_queue, version='3.19')
        cctxt.cast(ctxt, 'extend_volume_completion', volume=volume,
                   new_size=new_size, reservations=reservations, error=error)

    def migrate_volume(self, ctxt, volume, dest_backend, force_host_copy):
        backend_p = {'host': dest_backend.host,
                     'cluster_name': dest_backend.cluster_name,
                     'capabilities': dest_backend.capabilities}

        version = '3.5'
        if not self.client.can_send_version(version):
            version = '3.0'
            del backend_p['cluster_name']

        cctxt = self._get_cctxt(volume.service_topic_queue, version)
        cctxt.cast(ctxt, 'migrate_volume', volume=volume, host=backend_p,
                   force_host_copy=force_host_copy)

    def migrate_volume_completion(self, ctxt, volume, new_volume, error):
        cctxt = self._get_cctxt(volume.service_topic_queue)
        return cctxt.call(ctxt, 'migrate_volume_completion', volume=volume,
                          new_volume=new_volume, error=error,)

    def retype(self, ctxt, volume, new_type_id, dest_backend,
               migration_policy='never', reservations=None,
               old_reservations=None):
        backend_p = {'host': dest_backend.host,
                     'cluster_name': dest_backend.cluster_name,
                     'capabilities': dest_backend.capabilities}
        version = '3.5'
        if not self.client.can_send_version(version):
            version = '3.0'
            del backend_p['cluster_name']

        cctxt = self._get_cctxt(volume.service_topic_queue, version)
        cctxt.cast(ctxt, 'retype', volume=volume, new_type_id=new_type_id,
                   host=backend_p, migration_policy=migration_policy,
                   reservations=reservations,
                   old_reservations=old_reservations)

    def manage_existing(self, ctxt, volume, ref):
        cctxt = self._get_cctxt(volume.service_topic_queue)
        cctxt.cast(ctxt, 'manage_existing', ref=ref, volume=volume)

    def update_migrated_volume(self, ctxt, volume, new_volume,
                               original_volume_status):
        cctxt = self._get_cctxt(new_volume.service_topic_queue)
        cctxt.call(ctxt, 'update_migrated_volume',
                   volume=volume,
                   new_volume=new_volume,
                   volume_status=original_volume_status)

    def freeze_host(self, ctxt, service):
        """Set backend host to frozen."""
        cctxt = self._get_cctxt(service.service_topic_queue)
        return cctxt.call(ctxt, 'freeze_host')

    def thaw_host(self, ctxt, service):
        """Clear the frozen setting on a backend host."""
        cctxt = self._get_cctxt(service.service_topic_queue)
        return cctxt.call(ctxt, 'thaw_host')

    def failover(self, ctxt, service, secondary_backend_id=None):
        """Failover host to the specified backend_id (secondary). """
        version = '3.8'
        method = 'failover'
        if not self.client.can_send_version(version):
            version = '3.0'
            method = 'failover_host'
        cctxt = self._get_cctxt(service.service_topic_queue, version)
        cctxt.cast(ctxt, method, secondary_backend_id=secondary_backend_id)

    def failover_completed(self, ctxt, service, updates):
        """Complete failover on all services of the cluster."""
        cctxt = self._get_cctxt(service.service_topic_queue, '3.8',
                                fanout=True)
        cctxt.cast(ctxt, 'failover_completed', updates=updates)

    def manage_existing_snapshot(self, ctxt, snapshot, ref, backend):
        cctxt = self._get_cctxt(backend)
        cctxt.cast(ctxt, 'manage_existing_snapshot',
                   snapshot=snapshot,
                   ref=ref)

    def get_capabilities(self, ctxt, backend_id, discover):
        cctxt = self._get_cctxt(backend_id)
        return cctxt.call(ctxt, 'get_capabilities', discover=discover)

    def get_backup_device(self, ctxt, backup, volume):
        cctxt = self._get_cctxt(volume.service_topic_queue, ('3.17', '3.2',
                                                             '3.0'))
        if cctxt.can_send_version('3.17'):
            cctxt.cast(ctxt, 'get_backup_device', backup=backup,
                       want_objects=True, async_call=True)
            backup_obj = None
        elif cctxt.can_send_version('3.2'):
            backup_obj = cctxt.call(ctxt, 'get_backup_device', backup=backup,
                                    want_objects=True)
        else:
            backup_dict = cctxt.call(ctxt, 'get_backup_device', backup=backup)
            backup_obj = objects.BackupDeviceInfo.from_primitive(backup_dict,
                                                                 ctxt)
        return backup_obj

    def secure_file_operations_enabled(self, ctxt, volume):
        cctxt = self._get_cctxt(volume.service_topic_queue)
        return cctxt.call(ctxt, 'secure_file_operations_enabled',
                          volume=volume)

    def get_manageable_volumes(self, ctxt, service, marker, limit, offset,
                               sort_keys, sort_dirs):
        version = ('3.10', '3.0')
        cctxt = self._get_cctxt(service.service_topic_queue, version=version)

        msg_args = {'marker': marker,
                    'limit': limit,
                    'offset': offset,
                    'sort_keys': sort_keys,
                    'sort_dirs': sort_dirs,
                    }

        if cctxt.can_send_version('3.10'):
            msg_args['want_objects'] = True

        return cctxt.call(ctxt, 'get_manageable_volumes', **msg_args)

    def get_manageable_snapshots(self, ctxt, service, marker, limit, offset,
                                 sort_keys, sort_dirs):
        version = ('3.10', '3.0')
        cctxt = self._get_cctxt(service.service_topic_queue, version=version)

        msg_args = {'marker': marker,
                    'limit': limit,
                    'offset': offset,
                    'sort_keys': sort_keys,
                    'sort_dirs': sort_dirs,
                    }

        if cctxt.can_send_version('3.10'):
            msg_args['want_objects'] = True

        return cctxt.call(ctxt, 'get_manageable_snapshots', **msg_args)

    def create_group(self,
                     ctxt: context.RequestContext,
                     group: 'objects.Group') -> None:
        cctxt = self._get_cctxt(group.service_topic_queue)
        cctxt.cast(ctxt, 'create_group', group=group)

    def delete_group(self, ctxt, group):
        cctxt = self._get_cctxt(group.service_topic_queue)
        cctxt.cast(ctxt, 'delete_group', group=group)

    def update_group(self, ctxt, group, add_volumes=None, remove_volumes=None):
        cctxt = self._get_cctxt(group.service_topic_queue)
        cctxt.cast(ctxt, 'update_group', group=group, add_volumes=add_volumes,
                   remove_volumes=remove_volumes)

    def create_group_from_src(self, ctxt, group, group_snapshot=None,
                              source_group=None):
        cctxt = self._get_cctxt(group.service_topic_queue)
        cctxt.cast(ctxt, 'create_group_from_src', group=group,
                   group_snapshot=group_snapshot, source_group=source_group)

    def create_group_snapshot(self, ctxt, group_snapshot):
        cctxt = self._get_cctxt(group_snapshot.service_topic_queue)
        cctxt.cast(ctxt, 'create_group_snapshot',
                   group_snapshot=group_snapshot)

    def delete_group_snapshot(self, ctxt, group_snapshot):
        cctxt = self._get_cctxt(group_snapshot.service_topic_queue)
        cctxt.cast(ctxt, 'delete_group_snapshot',
                   group_snapshot=group_snapshot)

    @rpc.assert_min_rpc_version('3.13')
    def initialize_connection_snapshot(self, ctxt, snapshot, connector):
        cctxt = self._get_cctxt(snapshot.service_topic_queue, version='3.13')
        return cctxt.call(ctxt, 'initialize_connection_snapshot',
                          snapshot_id=snapshot.id,
                          connector=connector)

    @rpc.assert_min_rpc_version('3.13')
    def terminate_connection_snapshot(self, ctxt, snapshot, connector,
                                      force=False):
        cctxt = self._get_cctxt(snapshot.service_topic_queue, version='3.13')
        return cctxt.call(ctxt, 'terminate_connection_snapshot',
                          snapshot_id=snapshot.id,
                          connector=connector, force=force)

    @rpc.assert_min_rpc_version('3.13')
    def remove_export_snapshot(self, ctxt, snapshot, sync=False):
        cctxt = self._get_cctxt(snapshot.service_topic_queue, version='3.13')
        if sync:
            cctxt.call(ctxt, 'remove_export_snapshot', snapshot_id=snapshot.id)
        else:
            cctxt.cast(ctxt, 'remove_export_snapshot', snapshot_id=snapshot.id)

    @rpc.assert_min_rpc_version('3.9')
    def attachment_update(self, ctxt, vref, connector, attachment_id):
        version = self._compat_ver('3.9')
        cctxt = self._get_cctxt(vref.service_topic_queue, version=version)
        return cctxt.call(ctxt,
                          'attachment_update',
                          vref=vref,
                          connector=connector,
                          attachment_id=attachment_id)

    @rpc.assert_min_rpc_version('3.9')
    def attachment_delete(self, ctxt, attachment_id, vref):
        version = self._compat_ver('3.9')
        cctxt = self._get_cctxt(vref.service_topic_queue, version=version)
        return cctxt.call(ctxt,
                          'attachment_delete',
                          attachment_id=attachment_id,
                          vref=vref)

    @rpc.assert_min_rpc_version('3.7')
    def do_cleanup(self, ctxt, cleanup_request):
        """Perform this service/cluster resource cleanup as requested."""
        destination = cleanup_request.service_topic_queue
        cctxt = self._get_cctxt(destination, '3.7')
        # NOTE(geguileo): This call goes to do_cleanup code in
        # cinder.manager.CleanableManager unless in the future we overwrite it
        # in cinder.volume.manager
        cctxt.cast(ctxt, 'do_cleanup', cleanup_request=cleanup_request)

    @rpc.assert_min_rpc_version('3.12')
    def set_log_levels(self, context, service, log_request):
        cctxt = self._get_cctxt(host=service.host, version='3.12')
        cctxt.cast(context, 'set_log_levels', log_request=log_request)

    @rpc.assert_min_rpc_version('3.12')
    def get_log_levels(self, context, service, log_request):
        cctxt = self._get_cctxt(host=service.host, version='3.12')
        return cctxt.call(context, 'get_log_levels', log_request=log_request)

    @rpc.assert_min_rpc_version('3.14')
    def enable_replication(self, ctxt, group):
        cctxt = self._get_cctxt(group.service_topic_queue, version='3.14')
        cctxt.cast(ctxt, 'enable_replication',
                   group=group)

    @rpc.assert_min_rpc_version('3.14')
    def disable_replication(self, ctxt, group):
        cctxt = self._get_cctxt(group.service_topic_queue, version='3.14')
        cctxt.cast(ctxt, 'disable_replication',
                   group=group)

    @rpc.assert_min_rpc_version('3.14')
    def failover_replication(self, ctxt, group, allow_attached_volume=False,
                             secondary_backend_id=None):
        cctxt = self._get_cctxt(group.service_topic_queue, version='3.14')
        cctxt.cast(ctxt, 'failover_replication',
                   group=group, allow_attached_volume=allow_attached_volume,
                   secondary_backend_id=secondary_backend_id)

    @rpc.assert_min_rpc_version('3.14')
    def list_replication_targets(self, ctxt, group):
        cctxt = self._get_cctxt(group.service_topic_queue, version='3.14')
        return cctxt.call(ctxt, 'list_replication_targets',
                          group=group)

    @rpc.assert_min_rpc_version('3.18')
    def reimage(self, ctxt, volume, image_meta):
        cctxt = self._get_cctxt(volume.service_topic_queue, version='3.18')
        cctxt.cast(ctxt, 'reimage', volume=volume, image_meta=image_meta)
