# Copyright 2021 Agnostiq Inc.
#
# This file is part of Covalent.
#
# Licensed under the Apache License 2.0 (the "License"). A copy of the
# License may be obtained with this software package or at
#
#     https://www.apache.org/licenses/LICENSE-2.0
#
# Use of this file is prohibited except in compliance with the License.
# 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 abc import ABC
from typing import BinaryIO, Generator, List, Union


class StorageBackend(ABC):
    def __init__(self):
        pass

    def get(self, bucket_name: str, object_name: str) -> Union[Generator[bytes, None, None], None]:
        raise NotImplementedError

    def put(
        self,
        data: BinaryIO,
        bucket_name: str,
        object_name: str,
        length: int,
        metadata: dict = None,
        overwrite: bool = False,
    ) -> (str, str):
        raise NotImplementedError

    def delete(self, bucket_name: str, object_names: List[str]):
        raise NotImplementedError
