# Copyright 2019 Google LLC
#
# 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 functools
import os

from firebase_admin import initialize_app
from firebase_admin.credentials import Certificate

from shared.config import config


@functools.lru_cache(maxsize=None, typed=False)
def _get_firebase_credentials():
    return Certificate(
        os.path.join(config.base_path, 'service_keys/firebase-adminsdk.json')
    )


@functools.lru_cache(maxsize=None, typed=False)
def get_app():
    return initialize_app(_get_firebase_credentials())
