#!/usr/bin/env python
# Copyright (c) 2010-2012 OpenStack, 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 sys
from optparse import OptionParser

from swift.common.manager import Manager, UnknownCommandError, \
    KILL_WAIT, RUN_DIR

USAGE = """%prog <server> [<server> ...] <command> [options]

Commands:
""" + '\n'.join(["%16s: %s" % x for x in Manager.list_commands()])


def main():
    parser = OptionParser(USAGE)
    parser.add_option('-v', '--verbose', action="store_true",
                      default=False, help="display verbose output")
    parser.add_option('-w', '--no-wait', action="store_false", dest="wait",
                      default=True, help="won't wait for server to start "
                      "before returning")
    parser.add_option('-o', '--once', action="store_true",
                      default=False, help="only run one pass of daemon")
    # this is a negative option, default is options.daemon = True
    parser.add_option('-n', '--no-daemon', action="store_false", dest="daemon",
                      default=True, help="start server interactively")
    parser.add_option('-g', '--graceful', action="store_true",
                      default=False, help="send SIGHUP to supporting servers")
    parser.add_option('-c', '--config-num', metavar="N", type="int",
                      dest="number", default=0,
                      help="send command to the Nth server only")
    parser.add_option('-k', '--kill-wait', metavar="N", type="int",
                      dest="kill_wait", default=KILL_WAIT,
                      help="wait N seconds for processes to die (default 15)")
    parser.add_option('-r', '--run-dir', type="str",
                      dest="run_dir", default=RUN_DIR,
                      help="alternative directory to store running pid files "
                      "default: %s" % RUN_DIR)

    options, args = parser.parse_args()

    if len(args) < 2:
        parser.print_help()
        print 'ERROR: specify server(s) and command'
        return 1

    command = args[-1]
    servers = args[:-1]

    # this is just a silly swap for me cause I always try to "start main"
    commands = dict(Manager.list_commands()).keys()
    if command not in commands and servers[0] in commands:
        servers.append(command)
        command = servers.pop(0)

    manager = Manager(servers, run_dir=options.run_dir)
    try:
        status = manager.run_command(command, **options.__dict__)
    except UnknownCommandError:
        parser.print_help()
        print 'ERROR: unknown command, %s' % command
        status = 1

    return 1 if status else 0


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