#
#   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.

"""Volume v3 Backup action implementations"""

import argparse
import logging
from collections.abc import Iterable, Sequence
from typing import Any

from osc_lib import utils

from openstackclient import command
from openstackclient.i18n import _

LOG = logging.getLogger(__name__)


class ExportBackupRecord(command.ShowOne):
    _description = _(
        """Export volume backup details.

Backup information can be imported into a new service instance to be able to
restore."""
    )

    def get_parser(self, prog_name: str) -> argparse.ArgumentParser:
        parser = super().get_parser(prog_name)
        parser.add_argument(
            "backup",
            metavar="<backup>",
            help=_("Backup to export (name or ID)"),
        )
        return parser

    def take_action(
        self, parsed_args: argparse.Namespace
    ) -> tuple[Sequence[str], Iterable[Any]]:
        volume_client = self.app.client_manager.volume
        backup = utils.find_resource(volume_client.backups, parsed_args.backup)
        backup_data = volume_client.backups.export_record(backup.id)

        # We only want to show "friendly" display names, but also want to keep
        # json structure compatibility with cinderclient
        if parsed_args.formatter == 'table':
            backup_data['Backup Service'] = backup_data.pop('backup_service')
            backup_data['Metadata'] = backup_data.pop('backup_url')

        col_headers, col_data = zip(*sorted(backup_data.items()))
        return col_headers, col_data


class ImportBackupRecord(command.ShowOne):
    _description = _(
        """Import volume backup details.

Exported backup details contain the metadata necessary to restore to a new or
rebuilt service instance"""
    )

    def get_parser(self, prog_name: str) -> argparse.ArgumentParser:
        parser = super().get_parser(prog_name)
        parser.add_argument(
            "backup_service",
            metavar="<backup_service>",
            help=_("Backup service containing the backup."),
        )
        parser.add_argument(
            "backup_metadata",
            metavar="<backup_metadata>",
            help=_("Encoded backup metadata from export."),
        )
        return parser

    def take_action(
        self, parsed_args: argparse.Namespace
    ) -> tuple[Sequence[str], Iterable[Any]]:
        volume_client = self.app.client_manager.volume
        backup_data = volume_client.backups.import_record(
            parsed_args.backup_service, parsed_args.backup_metadata
        )
        backup_data.pop('links', None)
        col_headers, col_data = zip(*sorted(backup_data.items()))
        return col_headers, col_data
