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

# The MIT License
#
# Copyright 2012 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 class. """

import argparse
import logging
import sys
from threading import Event
import time

from pygerrit.client import GerritClient
from pygerrit.error import GerritError
from pygerrit.events import ErrorEvent


def _main():
    descr = 'Send request using Gerrit ssh API'
    parser = argparse.ArgumentParser(
        description=descr,
        formatter_class=argparse.ArgumentDefaultsHelpFormatter)
    parser.add_argument('-g', '--gerrit-hostname', dest='hostname',
                        default='review',
                        help='gerrit server hostname')
    parser.add_argument('-p', '--port', dest='port',
                        type=int, default=29418,
                        help='port number')
    parser.add_argument('-u', '--username', dest='username',
                        help='username')
    parser.add_argument('-b', '--blocking', dest='blocking',
                        action='store_true',
                        help='block on event get')
    parser.add_argument('-t', '--timeout', dest='timeout',
                        default=None, type=int,
                        metavar='SECONDS',
                        help='timeout for blocking event get')
    parser.add_argument('-v', '--verbose', dest='verbose',
                        action='store_true',
                        help='enable verbose (debug) logging')
    parser.add_argument('-i', '--ignore-stream-errors', dest='ignore',
                        action='store_true',
                        help='do not exit when an error event is received')

    options = parser.parse_args()
    if options.timeout and not options.blocking:
        parser.error('Can only use --timeout with --blocking')

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

    try:
        gerrit = GerritClient(host=options.hostname,
                              username=options.username,
                              port=options.port)
        logging.info("Connected to Gerrit version [%s]",
                     gerrit.gerrit_version())
        gerrit.start_event_stream()
    except GerritError as err:
        logging.error("Gerrit error: %s", err)
        return 1

    errors = Event()
    try:
        while True:
            event = gerrit.get_event(block=options.blocking,
                                     timeout=options.timeout)
            if event:
                logging.info("Event: %s", event)
                if isinstance(event, ErrorEvent) and not options.ignore:
                    logging.error(event.error)
                    errors.set()
                    break
            else:
                logging.info("No event")
                if not options.blocking:
                    time.sleep(1)
    except KeyboardInterrupt:
        logging.info("Terminated by user")
    finally:
        logging.debug("Stopping event stream...")
        gerrit.stop_event_stream()

    if errors.isSet():
        logging.error("Exited with error")
        return 1

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