# 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 types so that we can reference ListType in sphinx param declarations.
# We can't just use list, because sphinx gets confused by
# openstack.resource.Resource.list and openstack.resource2.Resource.list
import types  # noqa
import warnings

from openstack.cloud import exc
from openstack.cloud import _normalize
from openstack.cloud import _utils
from openstack import proxy
from openstack import utils


def _no_pending_volumes(volumes):
    """If there are any volumes not in a steady state, don't cache"""
    for volume in volumes:
        if volume['status'] not in ('available', 'error', 'in-use'):
            return False
    return True


class BlockStorageCloudMixin(_normalize.Normalizer):

    @property
    def _volume_client(self):
        if 'block-storage' not in self._raw_clients:
            client = self._get_raw_client('block-storage')
            self._raw_clients['block-storage'] = client
        return self._raw_clients['block-storage']

    @_utils.cache_on_arguments(should_cache_fn=_no_pending_volumes)
    def list_volumes(self, cache=True):
        """List all available volumes.

        :returns: A list of volume ``munch.Munch``.

        """
        def _list(data):
            volumes.extend(data.get('volumes', []))
            endpoint = None
            for l in data.get('volumes_links', []):
                if 'rel' in l and 'next' == l['rel']:
                    endpoint = l['href']
                    break
            if endpoint:
                try:
                    _list(self._volume_client.get(endpoint))
                except exc.OpenStackCloudURINotFound:
                    # Catch and re-raise here because we are making recursive
                    # calls and we just have context for the log here
                    self.log.debug(
                        "While listing volumes, could not find next link"
                        " {link}.".format(link=data))
                    raise

        if not cache:
            warnings.warn('cache argument to list_volumes is deprecated. Use '
                          'invalidate instead.')

        # Fetching paginated volumes can fails for several reasons, if
        # something goes wrong we'll have to start fetching volumes from
        # scratch
        attempts = 5
        for _ in range(attempts):
            volumes = []
            data = self._volume_client.get('/volumes/detail')
            if 'volumes_links' not in data:
                # no pagination needed
                volumes.extend(data.get('volumes', []))
                break

            try:
                _list(data)
                break
            except exc.OpenStackCloudURINotFound:
                pass
        else:
            self.log.debug(
                "List volumes failed to retrieve all volumes after"
                " {attempts} attempts. Returning what we found.".format(
                    attempts=attempts))
        # list volumes didn't complete succesfully so just return what
        # we found
        return self._normalize_volumes(
            self._get_and_munchify(key=None, data=volumes))

    @_utils.cache_on_arguments()
    def list_volume_types(self, get_extra=True):
        """List all available volume types.

        :returns: A list of volume ``munch.Munch``.

        """
        data = self._volume_client.get(
            '/types',
            params=dict(is_public='None'),
            error_message='Error fetching volume_type list')
        return self._normalize_volume_types(
            self._get_and_munchify('volume_types', data))

    def get_volume(self, name_or_id, filters=None):
        """Get a volume by name or ID.

        :param name_or_id: Name or ID of the volume.
        :param filters:
            A dictionary of meta data to use for further filtering. Elements
            of this dictionary may, themselves, be dictionaries. Example::

                {
                  'last_name': 'Smith',
                  'other': {
                      'gender': 'Female'
                  }
                }

            OR
            A string containing a jmespath expression for further filtering.
            Example:: "[?last_name==`Smith`] | [?other.gender]==`Female`]"

        :returns: A volume ``munch.Munch`` or None if no matching volume is
                  found.

        """
        return _utils._get_entity(self, 'volume', name_or_id, filters)

    def get_volume_by_id(self, id):
        """ Get a volume by ID

        :param id: ID of the volume.
        :returns: A volume ``munch.Munch``.
        """
        data = self._volume_client.get(
            '/volumes/{id}'.format(id=id),
            error_message="Error getting volume with ID {id}".format(id=id)
        )
        volume = self._normalize_volume(
            self._get_and_munchify('volume', data))

        return volume

    def get_volume_type(self, name_or_id, filters=None):
        """Get a volume type by name or ID.

        :param name_or_id: Name or ID of the volume.
        :param filters:
            A dictionary of meta data to use for further filtering. Elements
            of this dictionary may, themselves, be dictionaries. Example::

                {
                  'last_name': 'Smith',
                  'other': {
                      'gender': 'Female'
                  }
                }

            OR
            A string containing a jmespath expression for further filtering.
            Example:: "[?last_name==`Smith`] | [?other.gender]==`Female`]"

        :returns: A volume ``munch.Munch`` or None if no matching volume is
                  found.

        """
        return _utils._get_entity(
            self, 'volume_type', name_or_id, filters)

    def create_volume(
            self, size,
            wait=True, timeout=None, image=None, bootable=None, **kwargs):
        """Create a volume.

        :param size: Size, in GB of the volume to create.
        :param name: (optional) Name for the volume.
        :param description: (optional) Name for the volume.
        :param wait: If true, waits for volume to be created.
        :param timeout: Seconds to wait for volume creation. None is forever.
        :param image: (optional) Image name, ID or object from which to create
                      the volume
        :param bootable: (optional) Make this volume bootable. If set, wait
                         will also be set to true.
        :param kwargs: Keyword arguments as expected for cinder client.

        :returns: The created volume object.

        :raises: OpenStackCloudTimeout if wait time exceeded.
        :raises: OpenStackCloudException on operation error.
        """
        if bootable is not None:
            wait = True

        if image:
            image_obj = self.get_image(image)
            if not image_obj:
                raise exc.OpenStackCloudException(
                    "Image {image} was requested as the basis for a new"
                    " volume, but was not found on the cloud".format(
                        image=image))
            kwargs['imageRef'] = image_obj['id']
        kwargs = self._get_volume_kwargs(kwargs)
        kwargs['size'] = size
        payload = dict(volume=kwargs)
        if 'scheduler_hints' in kwargs:
            payload['OS-SCH-HNT:scheduler_hints'] = kwargs.pop(
                'scheduler_hints', None)
        data = self._volume_client.post(
            '/volumes',
            json=dict(payload),
            error_message='Error in creating volume')
        volume = self._get_and_munchify('volume', data)
        self.list_volumes.invalidate(self)

        if volume['status'] == 'error':
            raise exc.OpenStackCloudException("Error in creating volume")

        if wait:
            vol_id = volume['id']
            for count in utils.iterate_timeout(
                    timeout,
                    "Timeout waiting for the volume to be available."):
                volume = self.get_volume(vol_id)

                if not volume:
                    continue

                if volume['status'] == 'available':
                    if bootable is not None:
                        self.set_volume_bootable(volume, bootable=bootable)
                        # no need to re-fetch to update the flag, just set it.
                        volume['bootable'] = bootable
                    return volume

                if volume['status'] == 'error':
                    raise exc.OpenStackCloudException("Error creating volume")

        return self._normalize_volume(volume)

    def update_volume(self, name_or_id, **kwargs):
        kwargs = self._get_volume_kwargs(kwargs)

        volume = self.get_volume(name_or_id)
        if not volume:
            raise exc.OpenStackCloudException(
                "Volume %s not found." % name_or_id)

        data = self._volume_client.put(
            '/volumes/{volume_id}'.format(volume_id=volume.id),
            json=dict({'volume': kwargs}),
            error_message='Error updating volume')

        self.list_volumes.invalidate(self)

        return self._normalize_volume(self._get_and_munchify('volume', data))

    def set_volume_bootable(self, name_or_id, bootable=True):
        """Set a volume's bootable flag.

        :param name_or_id: Name, unique ID of the volume or a volume dict.
        :param bool bootable: Whether the volume should be bootable.
                              (Defaults to True)

        :raises: OpenStackCloudTimeout if wait time exceeded.
        :raises: OpenStackCloudException on operation error.
        """

        volume = self.get_volume(name_or_id)

        if not volume:
            raise exc.OpenStackCloudException(
                "Volume {name_or_id} does not exist".format(
                    name_or_id=name_or_id))

        self._volume_client.post(
            'volumes/{id}/action'.format(id=volume['id']),
            json={'os-set_bootable': {'bootable': bootable}},
            error_message="Error setting bootable on volume {volume}".format(
                volume=volume['id'])
        )

    def delete_volume(self, name_or_id=None, wait=True, timeout=None,
                      force=False):
        """Delete a volume.

        :param name_or_id: Name or unique ID of the volume.
        :param wait: If true, waits for volume to be deleted.
        :param timeout: Seconds to wait for volume deletion. None is forever.
        :param force: Force delete volume even if the volume is in deleting
            or error_deleting state.

        :raises: OpenStackCloudTimeout if wait time exceeded.
        :raises: OpenStackCloudException on operation error.
        """

        self.list_volumes.invalidate(self)
        volume = self.get_volume(name_or_id)

        if not volume:
            self.log.debug(
                "Volume %(name_or_id)s does not exist",
                {'name_or_id': name_or_id},
                exc_info=True)
            return False

        with _utils.shade_exceptions("Error in deleting volume"):
            try:
                if force:
                    self._volume_client.post(
                        'volumes/{id}/action'.format(id=volume['id']),
                        json={'os-force_delete': None})
                else:
                    self._volume_client.delete(
                        'volumes/{id}'.format(id=volume['id']))
            except exc.OpenStackCloudURINotFound:
                self.log.debug(
                    "Volume {id} not found when deleting. Ignoring.".format(
                        id=volume['id']))
                return False

        self.list_volumes.invalidate(self)
        if wait:
            for count in utils.iterate_timeout(
                    timeout,
                    "Timeout waiting for the volume to be deleted."):

                if not self.get_volume(volume['id']):
                    break

        return True

    def get_volumes(self, server, cache=True):
        volumes = []
        for volume in self.list_volumes(cache=cache):
            for attach in volume['attachments']:
                if attach['server_id'] == server['id']:
                    volumes.append(volume)
        return volumes

    def get_volume_limits(self, name_or_id=None):
        """ Get volume limits for a project

        :param name_or_id: (optional) project name or ID to get limits for
                           if different from the current project
        :raises: OpenStackCloudException if it's not a valid project

        :returns: Munch object with the limits
        """
        params = {}
        project_id = None
        error_msg = "Failed to get limits"
        if name_or_id:

            proj = self.get_project(name_or_id)
            if not proj:
                raise exc.OpenStackCloudException("project does not exist")
            project_id = proj.id
            params['tenant_id'] = project_id
            error_msg = "{msg} for the project: {project} ".format(
                msg=error_msg, project=name_or_id)

        data = self._volume_client.get('/limits', params=params)
        limits = self._get_and_munchify('limits', data)
        return limits

    def get_volume_id(self, name_or_id):
        volume = self.get_volume(name_or_id)
        if volume:
            return volume['id']
        return None

    def volume_exists(self, name_or_id):
        return self.get_volume(name_or_id) is not None

    def get_volume_attach_device(self, volume, server_id):
        """Return the device name a volume is attached to for a server.

        This can also be used to verify if a volume is attached to
        a particular server.

        :param volume: Volume dict
        :param server_id: ID of server to check

        :returns: Device name if attached, None if volume is not attached.
        """
        for attach in volume['attachments']:
            if server_id == attach['server_id']:
                return attach['device']
        return None

    def detach_volume(self, server, volume, wait=True, timeout=None):
        """Detach a volume from a server.

        :param server: The server dict to detach from.
        :param volume: The volume dict to detach.
        :param wait: If true, waits for volume to be detached.
        :param timeout: Seconds to wait for volume detachment. None is forever.

        :raises: OpenStackCloudTimeout if wait time exceeded.
        :raises: OpenStackCloudException on operation error.
        """

        proxy._json_response(self.compute.delete(
            '/servers/{server_id}/os-volume_attachments/{volume_id}'.format(
                server_id=server['id'], volume_id=volume['id'])),
            error_message=(
                "Error detaching volume {volume} from server {server}".format(
                    volume=volume['id'], server=server['id'])))

        if wait:
            for count in utils.iterate_timeout(
                    timeout,
                    "Timeout waiting for volume %s to detach." % volume['id']):
                try:
                    vol = self.get_volume(volume['id'])
                except Exception:
                    self.log.debug(
                        "Error getting volume info %s", volume['id'],
                        exc_info=True)
                    continue

                if vol['status'] == 'available':
                    return

                if vol['status'] == 'error':
                    raise exc.OpenStackCloudException(
                        "Error in detaching volume %s" % volume['id']
                    )

    def attach_volume(self, server, volume, device=None,
                      wait=True, timeout=None):
        """Attach a volume to a server.

        This will attach a volume, described by the passed in volume
        dict (as returned by get_volume()), to the server described by
        the passed in server dict (as returned by get_server()) on the
        named device on the server.

        If the volume is already attached to the server, or generally not
        available, then an exception is raised. To re-attach to a server,
        but under a different device, the user must detach it first.

        :param server: The server dict to attach to.
        :param volume: The volume dict to attach.
        :param device: The device name where the volume will attach.
        :param wait: If true, waits for volume to be attached.
        :param timeout: Seconds to wait for volume attachment. None is forever.

        :returns: a volume attachment object.

        :raises: OpenStackCloudTimeout if wait time exceeded.
        :raises: OpenStackCloudException on operation error.
        """
        dev = self.get_volume_attach_device(volume, server['id'])
        if dev:
            raise exc.OpenStackCloudException(
                "Volume %s already attached to server %s on device %s"
                % (volume['id'], server['id'], dev)
            )

        if volume['status'] != 'available':
            raise exc.OpenStackCloudException(
                "Volume %s is not available. Status is '%s'"
                % (volume['id'], volume['status'])
            )

        payload = {'volumeId': volume['id']}
        if device:
            payload['device'] = device
        data = proxy._json_response(
            self.compute.post(
                '/servers/{server_id}/os-volume_attachments'.format(
                    server_id=server['id']),
                json=dict(volumeAttachment=payload)),
            error_message="Error attaching volume {volume_id} to server "
                          "{server_id}".format(volume_id=volume['id'],
                                               server_id=server['id']))

        if wait:
            for count in utils.iterate_timeout(
                    timeout,
                    "Timeout waiting for volume %s to attach." % volume['id']):
                try:
                    self.list_volumes.invalidate(self)
                    vol = self.get_volume(volume['id'])
                except Exception:
                    self.log.debug(
                        "Error getting volume info %s", volume['id'],
                        exc_info=True)
                    continue

                if self.get_volume_attach_device(vol, server['id']):
                    break

                # TODO(Shrews) check to see if a volume can be in error status
                #              and also attached. If so, we should move this
                #              above the get_volume_attach_device call
                if vol['status'] == 'error':
                    raise exc.OpenStackCloudException(
                        "Error in attaching volume %s" % volume['id']
                    )
        return self._normalize_volume_attachment(
            self._get_and_munchify('volumeAttachment', data))

    def _get_volume_kwargs(self, kwargs):
        name = kwargs.pop('name', kwargs.pop('display_name', None))
        description = kwargs.pop('description',
                                 kwargs.pop('display_description', None))
        if name:
            if self._is_client_version('volume', 2):
                kwargs['name'] = name
            else:
                kwargs['display_name'] = name
        if description:
            if self._is_client_version('volume', 2):
                kwargs['description'] = description
            else:
                kwargs['display_description'] = description
        return kwargs

    @_utils.valid_kwargs('name', 'display_name',
                         'description', 'display_description')
    def create_volume_snapshot(self, volume_id, force=False,
                               wait=True, timeout=None, **kwargs):
        """Create a volume.

        :param volume_id: the ID of the volume to snapshot.
        :param force: If set to True the snapshot will be created even if the
                      volume is attached to an instance, if False it will not
        :param name: name of the snapshot, one will be generated if one is
                     not provided
        :param description: description of the snapshot, one will be generated
                            if one is not provided
        :param wait: If true, waits for volume snapshot to be created.
        :param timeout: Seconds to wait for volume snapshot creation. None is
                        forever.

        :returns: The created volume object.

        :raises: OpenStackCloudTimeout if wait time exceeded.
        :raises: OpenStackCloudException on operation error.
        """

        kwargs = self._get_volume_kwargs(kwargs)
        payload = {'volume_id': volume_id, 'force': force}
        payload.update(kwargs)
        data = self._volume_client.post(
            '/snapshots',
            json=dict(snapshot=payload),
            error_message="Error creating snapshot of volume "
                          "{volume_id}".format(volume_id=volume_id))
        snapshot = self._get_and_munchify('snapshot', data)
        if wait:
            snapshot_id = snapshot['id']
            for count in utils.iterate_timeout(
                    timeout,
                    "Timeout waiting for the volume snapshot to be available."
            ):
                snapshot = self.get_volume_snapshot_by_id(snapshot_id)

                if snapshot['status'] == 'available':
                    break

                if snapshot['status'] == 'error':
                    raise exc.OpenStackCloudException(
                        "Error in creating volume snapshot")

        # TODO(mordred) need to normalize snapshots. We were normalizing them
        # as volumes, which is an error. They need to be normalized as
        # volume snapshots, which are completely different objects
        return snapshot

    def get_volume_snapshot_by_id(self, snapshot_id):
        """Takes a snapshot_id and gets a dict of the snapshot
        that maches that ID.

        Note: This is more efficient than get_volume_snapshot.

        param: snapshot_id: ID of the volume snapshot.

        """
        data = self._volume_client.get(
            '/snapshots/{snapshot_id}'.format(snapshot_id=snapshot_id),
            error_message="Error getting snapshot "
                          "{snapshot_id}".format(snapshot_id=snapshot_id))
        return self._normalize_volume(
            self._get_and_munchify('snapshot', data))

    def get_volume_snapshot(self, name_or_id, filters=None):
        """Get a volume by name or ID.

        :param name_or_id: Name or ID of the volume snapshot.
        :param filters:
            A dictionary of meta data to use for further filtering. Elements
            of this dictionary may, themselves, be dictionaries. Example::

                {
                  'last_name': 'Smith',
                  'other': {
                      'gender': 'Female'
                  }
                }

            OR
            A string containing a jmespath expression for further filtering.
            Example:: "[?last_name==`Smith`] | [?other.gender]==`Female`]"

        :returns: A volume ``munch.Munch`` or None if no matching volume is
                  found.
        """
        return _utils._get_entity(self, 'volume_snapshot', name_or_id,
                                  filters)

    def create_volume_backup(self, volume_id, name=None, description=None,
                             force=False, wait=True, timeout=None):
        """Create a volume backup.

        :param volume_id: the ID of the volume to backup.
        :param name: name of the backup, one will be generated if one is
                     not provided
        :param description: description of the backup, one will be generated
                            if one is not provided
        :param force: If set to True the backup will be created even if the
                      volume is attached to an instance, if False it will not
        :param wait: If true, waits for volume backup to be created.
        :param timeout: Seconds to wait for volume backup creation. None is
                        forever.

        :returns: The created volume backup object.

        :raises: OpenStackCloudTimeout if wait time exceeded.
        :raises: OpenStackCloudException on operation error.
        """
        payload = {
            'name': name,
            'volume_id': volume_id,
            'description': description,
            'force': force,
        }

        data = self._volume_client.post(
            '/backups', json=dict(backup=payload),
            error_message="Error creating backup of volume "
                          "{volume_id}".format(volume_id=volume_id))
        backup = self._get_and_munchify('backup', data)

        if wait:
            backup_id = backup['id']
            msg = ("Timeout waiting for the volume backup {} to be "
                   "available".format(backup_id))
            for _ in utils.iterate_timeout(timeout, msg):
                backup = self.get_volume_backup(backup_id)

                if backup['status'] == 'available':
                    break

                if backup['status'] == 'error':
                    raise exc.OpenStackCloudException(
                        "Error in creating volume backup {id}".format(
                            id=backup_id))

        return backup

    def get_volume_backup(self, name_or_id, filters=None):
        """Get a volume backup by name or ID.

        :returns: A backup ``munch.Munch`` or None if no matching backup is
                  found.
        """
        return _utils._get_entity(self, 'volume_backup', name_or_id,
                                  filters)

    def list_volume_snapshots(self, detailed=True, search_opts=None):
        """List all volume snapshots.

        :returns: A list of volume snapshots ``munch.Munch``.

        """
        endpoint = '/snapshots/detail' if detailed else '/snapshots'
        data = self._volume_client.get(
            endpoint,
            params=search_opts,
            error_message="Error getting a list of snapshots")
        return self._get_and_munchify('snapshots', data)

    def list_volume_backups(self, detailed=True, search_opts=None):
        """
        List all volume backups.

        :param bool detailed: Also list details for each entry
        :param dict search_opts: Search options
            A dictionary of meta data to use for further filtering. Example::

                {
                    'name': 'my-volume-backup',
                    'status': 'available',
                    'volume_id': 'e126044c-7b4c-43be-a32a-c9cbbc9ddb56',
                    'all_tenants': 1
                }

        :returns: A list of volume backups ``munch.Munch``.
        """
        endpoint = '/backups/detail' if detailed else '/backups'
        data = self._volume_client.get(
            endpoint, params=search_opts,
            error_message="Error getting a list of backups")
        return self._get_and_munchify('backups', data)

    def delete_volume_backup(self, name_or_id=None, force=False, wait=False,
                             timeout=None):
        """Delete a volume backup.

        :param name_or_id: Name or unique ID of the volume backup.
        :param force: Allow delete in state other than error or available.
        :param wait: If true, waits for volume backup to be deleted.
        :param timeout: Seconds to wait for volume backup deletion. None is
                        forever.

        :raises: OpenStackCloudTimeout if wait time exceeded.
        :raises: OpenStackCloudException on operation error.
        """

        volume_backup = self.get_volume_backup(name_or_id)

        if not volume_backup:
            return False

        msg = "Error in deleting volume backup"
        if force:
            self._volume_client.post(
                '/backups/{backup_id}/action'.format(
                    backup_id=volume_backup['id']),
                json={'os-force_delete': None},
                error_message=msg)
        else:
            self._volume_client.delete(
                '/backups/{backup_id}'.format(
                    backup_id=volume_backup['id']),
                error_message=msg)
        if wait:
            msg = "Timeout waiting for the volume backup to be deleted."
            for count in utils.iterate_timeout(timeout, msg):
                if not self.get_volume_backup(volume_backup['id']):
                    break

        return True

    def delete_volume_snapshot(self, name_or_id=None, wait=False,
                               timeout=None):
        """Delete a volume snapshot.

        :param name_or_id: Name or unique ID of the volume snapshot.
        :param wait: If true, waits for volume snapshot to be deleted.
        :param timeout: Seconds to wait for volume snapshot deletion. None is
                        forever.

        :raises: OpenStackCloudTimeout if wait time exceeded.
        :raises: OpenStackCloudException on operation error.
        """

        volumesnapshot = self.get_volume_snapshot(name_or_id)

        if not volumesnapshot:
            return False

        self._volume_client.delete(
            '/snapshots/{snapshot_id}'.format(
                snapshot_id=volumesnapshot['id']),
            error_message="Error in deleting volume snapshot")

        if wait:
            for count in utils.iterate_timeout(
                    timeout,
                    "Timeout waiting for the volume snapshot to be deleted."):
                if not self.get_volume_snapshot(volumesnapshot['id']):
                    break

        return True

    def search_volumes(self, name_or_id=None, filters=None):
        volumes = self.list_volumes()
        return _utils._filter_list(
            volumes, name_or_id, filters)

    def search_volume_snapshots(self, name_or_id=None, filters=None):
        volumesnapshots = self.list_volume_snapshots()
        return _utils._filter_list(
            volumesnapshots, name_or_id, filters)

    def search_volume_backups(self, name_or_id=None, filters=None):
        volume_backups = self.list_volume_backups()
        return _utils._filter_list(
            volume_backups, name_or_id, filters)

    def search_volume_types(
            self, name_or_id=None, filters=None, get_extra=True):
        volume_types = self.list_volume_types(get_extra=get_extra)
        return _utils._filter_list(volume_types, name_or_id, filters)

    def get_volume_type_access(self, name_or_id):
        """Return a list of volume_type_access.

        :param name_or_id: Name or ID of the volume type.

        :raises: OpenStackCloudException on operation error.
        """
        volume_type = self.get_volume_type(name_or_id)
        if not volume_type:
            raise exc.OpenStackCloudException(
                "VolumeType not found: %s" % name_or_id)

        data = self._volume_client.get(
            '/types/{id}/os-volume-type-access'.format(id=volume_type.id),
            error_message="Unable to get volume type access"
                          " {name}".format(name=name_or_id))
        return self._normalize_volume_type_accesses(
            self._get_and_munchify('volume_type_access', data))

    def add_volume_type_access(self, name_or_id, project_id):
        """Grant access on a volume_type to a project.

        :param name_or_id: ID or name of a volume_type
        :param project_id: A project id

        NOTE: the call works even if the project does not exist.

        :raises: OpenStackCloudException on operation error.
        """
        volume_type = self.get_volume_type(name_or_id)
        if not volume_type:
            raise exc.OpenStackCloudException(
                "VolumeType not found: %s" % name_or_id)
        with _utils.shade_exceptions():
            payload = {'project': project_id}
            self._volume_client.post(
                '/types/{id}/action'.format(id=volume_type.id),
                json=dict(addProjectAccess=payload),
                error_message="Unable to authorize {project} "
                              "to use volume type {name}".format(
                    name=name_or_id, project=project_id))

    def remove_volume_type_access(self, name_or_id, project_id):
        """Revoke access on a volume_type to a project.

        :param name_or_id: ID or name of a volume_type
        :param project_id: A project id

        :raises: OpenStackCloudException on operation error.
        """
        volume_type = self.get_volume_type(name_or_id)
        if not volume_type:
            raise exc.OpenStackCloudException(
                "VolumeType not found: %s" % name_or_id)
        with _utils.shade_exceptions():
            payload = {'project': project_id}
            self._volume_client.post(
                '/types/{id}/action'.format(id=volume_type.id),
                json=dict(removeProjectAccess=payload),
                error_message="Unable to revoke {project} "
                              "to use volume type {name}".format(
                    name=name_or_id, project=project_id))