#!/usr/bin/env python3

import argparse
import os
import pathlib
import logging
import sys

from . import bot as bot_mod, config as config_mod

def parse_arguments(arglist):
    try:
        config_dir = pathlib.Path(os.environ['XDG_CONFIG_DIR'])
    except KeyError:
        if os.getuid():
            config_dir = pathlib.Path.home() / '.config'
        else:
            config_dir = pathlib.Path('/etc')

    parser = argparse.ArgumentParser()
    parser.add_argument(
        '--config-file', '-C',
        type=pathlib.Path,
        default=config_dir / 'forwardxmpp/config.ini',
        help="Path to INI configuration file."
        " Default %(default)s.",
    )
    return parser.parse_args(arglist)

def setup_logger(logger, loglevel, stream):
    formatter = logging.Formatter('%(name)s: %(levelname)s: %(message)s')
    handler = logging.StreamHandler(stream)
    handler.setFormatter(formatter)
    logger.addHandler(handler)
    logger.setLevel(loglevel)

def main(arglist=None, stdout=sys.stdout, stderr=sys.stderr):
    args = parse_arguments(arglist)
    config = config_mod.Config()
    for _ in config.read_paths([args.config_file]):
        pass
    setup_logger(logging.getLogger(), config.get_loglevel(logging.WARNING), stderr)
    if not config.ready():
        return 3
    bot = bot_mod.ForwardBot(config)
    bot.connect()
    bot.process()
    return 0

if __name__ == '__main__':
    exit(main())