# -*-coding:utf-8-*-
#
# Copyright 2020. Huawei Technologies Co., Ltd. All rights reserved.
#
# 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.

"""Huawei Admin SDK for Python."""

import threading
from Service.VSeesHuaweiPushService.push_admin import _app

_apps = {}
_apps_lock = threading.RLock()
_DEFAULT_APP_NAME = 'DEFAULT'


def initialize_app(appid_at, appsecret_at, appid_push=None, token_server='https://oauth-login.cloud.huawei.com/oauth2/v3/token',
                   push_open_url='https://push-api.cloud.huawei.com'):
    """
        Initializes and returns a new App instance.
        :param appid_at: appid parameters obtained by developer alliance applying for Push service
        :param appsecret_at: appsecret parameters obtained by developer alliance applying for Push service
        :param appid_push: the application Id in the URL
        :param token_server: Oauth server URL
        :param push_open_url: push open API URL
    """
    app = _app.App(appid_at, appsecret_at, appid_push, token_server=token_server, push_open_url=push_open_url)

    with _apps_lock:
        if appid_at not in _apps:
            _apps[appid_at] = app

        """set default app instance"""
        if _apps.get(_DEFAULT_APP_NAME) is None:
            _apps[_DEFAULT_APP_NAME] = app


def get_app(appid=None):
    """
        get app instance
        :param appid: appid parameters obtained by developer alliance applying for Push service
        :return: app instance
        Raise: ValueError
    """
    if appid is None:
        with _apps_lock:
            app = _apps.get(_DEFAULT_APP_NAME)
            if app is None:
                raise ValueError('The default Huawei app is not exists. '
                                 'This means you need to call initialize_app() it.')
            return app

    with _apps_lock:
        if appid not in _apps:
            raise ValueError('Huawei app id[{0}] is not exists. '
                             'This means you need to call initialize_app() it.'.format(appid))

        app = _apps.get(appid)
        if app is None:
            raise ValueError('The app id[{0}] is None.'.format(appid))
        return app