#!/usr/bin/env python
import os
from oauth2client import client, tools
from oauth2client.file import Storage

SCOPES = 'https://www.googleapis.com/auth/calendar https://mail.google.com/ https://www.googleapis.com/auth/drive https://www.googleapis.com/auth/groups https://www.googleapis.com/auth/admin.directory.user'

def get_credentials():
    credential_dir =os.getcwd()
    client_secret_path = os.path.join(credential_dir, 'client_secrets.json')
    saved_secret_path = os.path.join(credential_dir, 'saved_creds.json')

    store = Storage(saved_secret_path)
    credentials = store.get()
    if not credentials or credentials.invalid:
        flow = client.flow_from_clientsecrets(client_secret_path, SCOPES, redirect_uri='http://localhost')
        url = flow.step1_get_authorize_url()
        flags = tools.argparser.parse_args(args=[])
        flags.noauth_local_webserver = True
        credentials = tools.run_flow(flow, store, flags=flags)
    return credentials

if __name__ == "__main__":
    get_credentials()