#!/usr/bin/env python
# -*- coding: utf-8 -*-

# The MIT License
#
# Copyright 2013 Sony Mobile Communications. All rights reserved.
#
# 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.

""" Example of using the Gerrit client REST API. """

import argparse
import logging
import sys

from requests.auth import HTTPBasicAuth, HTTPDigestAuth
from requests.exceptions import RequestException
try:
    # pylint: disable=F0401
    from requests_kerberos import HTTPKerberosAuth, OPTIONAL
    # pylint: enable=F0401
    _kerberos_support = True
except ImportError:
    _kerberos_support = False

from pygerrit.rest import GerritRestAPI
from pygerrit.rest.auth import HTTPDigestAuthFromNetrc, HTTPBasicAuthFromNetrc


def _main():
    descr = 'Send request using Gerrit HTTP API'
    parser = argparse.ArgumentParser(
        description=descr,
        formatter_class=argparse.ArgumentDefaultsHelpFormatter)
    parser.add_argument('-g', '--gerrit-url', dest='gerrit_url',
                        required=True,
                        help='gerrit server url')
    parser.add_argument('-b', '--basic-auth', dest='basic_auth',
                        action='store_true',
                        help='use basic auth instead of digest')
    if _kerberos_support:
        parser.add_argument('-k', '--kerberos-auth', dest='kerberos_auth',
                            action='store_true',
                            help='use kerberos auth')
    parser.add_argument('-u', '--username', dest='username',
                        help='username')
    parser.add_argument('-p', '--password', dest='password',
                        help='password')
    parser.add_argument('-n', '--netrc', dest='netrc',
                        action='store_true',
                        help='Use credentials from netrc')
    parser.add_argument('-v', '--verbose', dest='verbose',
                        action='store_true',
                        help='enable verbose (debug) logging')

    options = parser.parse_args()

    level = logging.DEBUG if options.verbose else logging.INFO
    logging.basicConfig(format='%(asctime)s %(levelname)s %(message)s',
                        level=level)

    if _kerberos_support and options.kerberos_auth:
        if options.username or options.password \
                or options.basic_auth or options.netrc:
            parser.error("--kerberos-auth may not be used together with "
                         "--username, --password, --basic-auth or --netrc")
        auth = HTTPKerberosAuth(mutual_authentication=OPTIONAL)
    elif options.username and options.password:
        if options.netrc:
            logging.warning("--netrc option ignored")
        if options.basic_auth:
            auth = HTTPBasicAuth(options.username, options.password)
        else:
            auth = HTTPDigestAuth(options.username, options.password)
    elif options.netrc:
        if options.basic_auth:
            auth = HTTPBasicAuthFromNetrc(url=options.gerrit_url)
        else:
            auth = HTTPDigestAuthFromNetrc(url=options.gerrit_url)
    else:
        auth = None

    rest = GerritRestAPI(url=options.gerrit_url, auth=auth)

    try:
        changes = rest.get("/changes/?q=owner:self%20status:open")
        logging.info("%d changes", len(changes))
        for change in changes:
            logging.info(change['change_id'])
    except RequestException as err:
        logging.error("Error: %s", str(err))

if __name__ == "__main__":
    sys.exit(_main())