#!/usr/bin/env python3
# -*- coding: utf-8 -*-
# ******************************************************************************
#  $Id$
#
#  Project:  GDAL
#  Purpose:  Application for Google web service authentication.
#  Author:   Frank Warmerdam, warmerdam@pobox.com
#
# ******************************************************************************
#  Copyright (c) 2013, Frank Warmerdam <warmerdam@pobox.com>
#
#  Permission is hereby granted, free of charge, to any person obtaining a
#  copy of this software and associated documentation files (the "Software"),
#  to deal in the Software without restriction, including without limitation
#  the rights to use, copy, modify, merge, publish, distribute, sublicense,
#  and/or sell copies of the Software, and to permit persons to whom the
#  Software is furnished to do so, subject to the following conditions:
#
#  The above copyright notice and this permission notice shall be included
#  in all copies or substantial portions of the Software.
#
#  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
#  OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
#  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
#  THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
#  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
#  FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
#  DEALINGS IN THE SOFTWARE.
# ******************************************************************************


import sys
import time
import webbrowser

from osgeo import gdal

SCOPES = {
    'ft': 'https://www.googleapis.com/auth/fusiontables',
    'storage': 'https://www.googleapis.com/auth/devstorage.read_only',
    'storage-rw': 'https://www.googleapis.com/auth/devstorage.read_write'
}


def Usage():
    print('')
    print('Usage: gdal_auth_py [-s scope]')
    print('       - interactive use.')
    print('')
    print('or:')
    print('Usage: gdal_auth.py login [-s scope] ')
    print('Usage: gdal_auth.py auth2refresh [-s scope] auth_token')
    print('Usage: gdal_auth.py refresh2access [-s scope] refresh_token')
    print('')
    print('scopes: ft/storage/storage-rw/full_url')
    print('')
    return 1


def main(argv=sys.argv):
    scope = SCOPES['ft']
    token_in = None
    command = None

    argv = gdal.GeneralCmdLineProcessor(sys.argv)
    if argv is None:
        return 0

    # Parse command line arguments.
    i = 1
    while i < len(argv):
        arg = argv[i]

        if arg == '-s' and i < len(argv) - 1:
            if argv[i + 1] in SCOPES:
                scope = SCOPES[argv[i + 1]]
            elif argv[i + 1].startswith('http'):
                scope = argv[i + 1]
            else:
                print('Scope %s not recognised.' % argv[i + 1])
                return Usage()
            i = i + 1

        elif arg[0] == '-':
            return Usage()

        elif command is None:
            command = arg

        elif token_in is None:
            token_in = arg

        else:
            return Usage()

        i = i + 1

    if command is None:
        command = 'interactive'

    if command == 'login':
        print(gdal.GOA2GetAuthorizationURL(scope))
    elif command == 'auth2refresh':
        print(gdal.GOA2GetRefreshToken(token_in, scope))
    elif command == 'refresh2access':
        print(gdal.GOA2GetAccessToken(token_in, scope))
    elif command != 'interactive':
        return Usage()
    else:
        # Interactive case
        print('Authorization requested for scope:')
        print(scope)
        print('')
        print('Please login and authorize access in web browser...')

        webbrowser.open(gdal.GOA2GetAuthorizationURL(scope))

        time.sleep(2.0)

        print('')
        print('Enter authorization token:')
        auth_token = sys.stdin.readline()

        refresh_token = gdal.GOA2GetRefreshToken(auth_token, scope)

        print('Refresh Token:' + refresh_token)
        print('')
        if scope == SCOPES['ft']:
            print('Consider setting a configuration option like:')
            print('GFT_REFRESH_TOKEN=' + refresh_token)
        elif scope in (SCOPES['storage'], SCOPES['storage-rw']):
            print('Consider setting a configuration option like:')
            print('GS_OAUTH2_REFRESH_TOKEN=' + refresh_token)


if __name__ == '__main__':
    sys.exit(main(sys.argv))
