# Copyright (C) 2016-2023 RhodeCode GmbH
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero General Public License, version 3
# (only), as published by the Free Software Foundation.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU Affero General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.
#
# This program is dual-licensed. If you wish to learn more about the
# RhodeCode Enterprise Edition, including its added features, Support services,
# and proprietary license terms, please see https://rhodecode.com/licenses/

import sys
import logging

import click

from rhodecode.lib.pyramid_utils import bootstrap
from rhodecode.lib.ext_json import json
from rhodecode.model.db import FileStore
from rhodecode.apps.file_store import utils as store_utils

log = logging.getLogger(__name__)


@click.command()
@click.argument('ini_path', type=click.Path(exists=True))
@click.argument('file_uid')
@click.option(
    '--source-backend-conf',
    type=click.Path(exists=True, dir_okay=False, readable=True),
    help='Source backend config file path in a json format'
)
@click.option(
    '--dest-backend-conf',
    type=click.Path(exists=True, dir_okay=False, readable=True),
    help='Source backend config file path in a json format'
)
def main(ini_path, file_uid, source_backend_conf, dest_backend_conf):
    return command(ini_path, file_uid, source_backend_conf, dest_backend_conf)


_source_settings = {}

_dest_settings = {}


def command(ini_path, file_uid, source_backend_conf, dest_backend_conf):
    with bootstrap(ini_path, env={'RC_CMD_SETUP_RC': '1'}) as env:
        migrate_func(env, file_uid, source_backend_conf, dest_backend_conf)


def migrate_func(env, file_uid, source_backend_conf=None, dest_backend_conf=None):
    """

    Example usage::

        from rhodecode.lib.rc_commands import migrate_artifact
        migrate_artifact._source_settings = {
            'file_store.backend.type': 'filesystem_v1',
            'file_store.filesystem_v1.storage_path': '/var/opt/rhodecode_data/file_store',
        }
        migrate_artifact._dest_settings = {
            'file_store.backend.type': 'objectstore',
            'file_store.objectstore.url': 'http://s3-minio:9000',
            'file_store.objectstore.bucket': 'rhodecode-file-store',
            'file_store.objectstore.key': 's3admin',
            'file_store.objectstore.secret': 's3secret4',
            'file_store.objectstore.region': 'eu-central-1',
        }
        for db_obj in FileStore.query().all():
            migrate_artifact.migrate_func({}, db_obj.file_uid)

    """

    try:
        from rc_ee.api.views.store_api import _store_file
    except ImportError:
        click.secho('ERROR: Unable to import store_api. '
                    'store_api is only available in EE edition of RhodeCode',
                    fg='red')
        sys.exit(-1)

    source_settings = _source_settings
    if source_backend_conf:
        source_settings = json.loads(open(source_backend_conf).read())
    dest_settings = _dest_settings
    if dest_backend_conf:
        dest_settings = json.loads(open(dest_backend_conf).read())

    if file_uid.isnumeric():
        file_store_db_obj = FileStore().query() \
            .filter(FileStore.file_store_id == file_uid) \
            .scalar()
    else:
        file_store_db_obj = FileStore().query() \
            .filter(FileStore.file_uid == file_uid) \
            .scalar()
    if not file_store_db_obj:
        click.secho(f'ERROR: Unable to fetch artifact from database file_uid={file_uid}',
                    fg='red')
        sys.exit(-1)

    uid_filename = file_store_db_obj.file_uid
    org_filename = file_store_db_obj.file_display_name
    click.secho(f'Attempting to migrate artifact {uid_filename}, filename: {org_filename}', fg='green')

    # get old version of f_store based on the data.

    origin_f_store = store_utils.get_filestore_backend(source_settings, always_init=True)
    reader, metadata = origin_f_store.fetch(uid_filename)

    target_f_store = store_utils.get_filestore_backend(dest_settings, always_init=True)
    target_f_store.import_to_store(reader, org_filename, uid_filename, metadata)

    click.secho(f'Migrated artifact {uid_filename}, filename: {org_filename} into {target_f_store} storage', fg='green')