'''

    The main behavior of centpkg

'''

#

# Author(s):

#            Jesse Keating <jkeating@redhat.com>

#            Pat Riehecky <riehecky@fnal.gov>

#            Brian Stinson <bstinson@ksu.edu>

#

# This program is free software; you can redistribute it and/or modify it

# under the terms of the GNU General Public License as published by the

# Free Software Foundation; either version 2 of the License, or (at your

# option) any later version.  See http://www.gnu.org/copyleft/gpl.html for

# the full text of the license.

import os

import sys

import logging

import six.moves.configparser as ConfigParser

import pyrpkg

import pyrpkg.utils

import centpkg.cli

def main():

    """

    Centpkg main.

    """

    program_name = os.path.basename(sys.argv[0])

    is_sig = program_name.endswith('-sig')

    default_user_config_path = os.path.join(

        os.path.expanduser('~'), '.config', 'rpkg', '%s.conf' % program_name)

    # Setup an argparser and parse the known commands to get the config file

    # - use the custom ArgumentParser class from pyrpkg.cli and disable

    #   argument abbreviation to ensure that --user will be not treated as

    #   --user-config

    parser = pyrpkg.cli.ArgumentParser(add_help=False, allow_abbrev=False)

    parser.add_argument('-C', '--config', help='Specify a config file to use',

                        default='/etc/rpkg/%s.conf' % program_name)

    parser.add_argument('--user-config', help='Specify a user config file to use',

                        default=default_user_config_path)

    parser.add_argument('--lookaside-structure',

                        help='set the lookaside cache structure type use',

                        choices=['branch', 'hash'],

                        default='hash')

    (args, other) = parser.parse_known_args()

    # Make sure we have a sane config file

    if not os.path.exists(args.config) and not other[-1] in ['--help', '-h', 'help']:

        sys.stderr.write('Invalid config file %s\n' % args.config)

        sys.exit(1)

    # Setup a configuration object and read config file data

    config = ConfigParser.SafeConfigParser()

    config.read(args.config)

    config.read(args.user_config)

    if is_sig:

        config[program_name]['lookaside_structure'] = args.lookaside_structure

    client = centpkg.cli.centpkgClient(config, name=program_name)    

    client.do_imports(site='centpkg')

    client.update_argparser(is_sig=is_sig)

    client.parse_cmdline()

    # This is due to a difference argparse behavior to Python 2 version.

    # In Python 3, argparse will proceed to here without reporting

    # "too few arguments". Instead, client.args does not have attribute

    # command.

    if not hasattr(client.args, 'command'):

        client.parser.print_help()

        sys.exit(1)

    if not client.args.path:

        try:

            client.args.path = pyrpkg.utils.getcwd()

        except Exception:

            print('Could not get current path, have you deleted it?')

            sys.exit(1)

    # setup the logger -- This logger will take things of INFO or DEBUG and

    # log it to stdout.  Anything above that (WARN, ERROR, CRITICAL) will go

    # to stderr.  Normal operation will show anything INFO and above.

    # Quiet hides INFO, while Verbose exposes DEBUG.  In all cases WARN or

    # higher are exposed (via stderr).

    log = pyrpkg.log

    client.setupLogging(log)

    if client.args.v:

        log.setLevel(logging.DEBUG)

    elif client.args.q:

        log.setLevel(logging.WARNING)

    else:

        log.setLevel(logging.INFO)

    # Run the necessary command

    try:

        sys.exit(client.args.command())

    except KeyboardInterrupt:

        pass

    except Exception as e:

        if getattr(client.args, 'debug', False):

            raise

        log.error('Could not execute %s: %s' % (client.args.command.__name__, e))

        sys.exit(1)

if __name__ == "__main__":

    main()