# Licensed to the Apache Software Foundation (ASF) under one
# or more contributor license agreements.  See the NOTICE file
# distributed with this work for additional information
# regarding copyright ownership.  The ASF licenses this file
# to you 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 __future__ import annotations

import os
from contextlib import contextmanager

from airflow.sdk.definitions.context import _AIRFLOW_PARSING_CONTEXT_DAG_ID, _AIRFLOW_PARSING_CONTEXT_TASK_ID


@contextmanager
def _airflow_parsing_context_manager(dag_id: str | None = None, task_id: str | None = None):
    old_dag_id = os.environ.get(_AIRFLOW_PARSING_CONTEXT_DAG_ID)
    old_task_id = os.environ.get(_AIRFLOW_PARSING_CONTEXT_TASK_ID)
    if dag_id is not None:
        os.environ[_AIRFLOW_PARSING_CONTEXT_DAG_ID] = dag_id
    if task_id is not None:
        os.environ[_AIRFLOW_PARSING_CONTEXT_TASK_ID] = task_id
    yield
    if old_task_id is not None:
        os.environ[_AIRFLOW_PARSING_CONTEXT_TASK_ID] = old_task_id
    if old_dag_id is not None:
        os.environ[_AIRFLOW_PARSING_CONTEXT_DAG_ID] = old_dag_id
