# Copyright 2018 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 os

from flask import Flask
import redis


app = Flask(__name__)


# [START gae_py37_redis_client]
redis_host = os.environ.get('REDIS_HOST', 'localhost')
redis_port = int(os.environ.get('REDIS_PORT', 6379))
redis_password = os.environ.get('REDIS_PASSWORD', None)
redis_client = redis.StrictRedis(
    host=redis_host, port=redis_port, password=redis_password)
# [END gae_py37_redis_client]


# [START gae_py37_redis_example]
@app.route('/')
def index():
    value = redis_client.incr('counter', 1)
    return 'Value is {}'.format(value)
# [END gae_py37_redis_example]


if __name__ == '__main__':
    # This is used when running locally only. When deploying to Google App
    # Engine, a webserver process such as Gunicorn will serve the app. This
    # can be configured by adding an `entrypoint` to app.yaml.
    app.run(host='127.0.0.1', port=8080, debug=True)