"""RCON client CLI."""

from argparse import ArgumentParser, Namespace
from getpass import getpass
from logging import DEBUG, INFO, basicConfig, getLogger
from socket import timeout
from sys import exit    # pylint: disable=W0622
from typing import Tuple

from rcon.exceptions import InvalidConfig
from rcon.config import Config, servers
from rcon.exceptions import RequestIdMismatch, WrongPassword
from rcon.proto import Client


__all__ = ['get_credentials', 'main']


LOGGER = getLogger('rconclt')
LOG_FORMAT = '[%(levelname)s] %(name)s: %(message)s'


def get_args() -> Namespace:
    """Parses and returns the CLI arguments."""

    parser = ArgumentParser(description='A Minecraft RCON client.')
    parser.add_argument('server', help='the server to connect to')
    parser.add_argument('-t', '--timeout', type=float, metavar='seconds',
                        help='connection timeout in seconds')
    parser.add_argument('-d', '--debug', action='store_true',
                        help='print additional debug information')
    parser.add_argument('command', help='command to execute on the server')
    parser.add_argument('argument', nargs='*', default=(),
                        help='arguments for the command')
    return parser.parse_args()


def get_credentials(server: str) -> Tuple[str, int, str]:
    """Get the credentials for a server from the respective server name."""

    try:
        host, port, passwd = Config.from_string(server)
    except InvalidConfig:
        try:
            host, port, passwd = servers()[server]
        except KeyError:
            LOGGER.error('No such server: %s.', server)
            exit(2)

    if passwd is None:
        try:
            passwd = getpass('Password: ')
        except (KeyboardInterrupt, EOFError):
            print()
            LOGGER.error('Aborted by user.')
            exit(1)

    return (host, port, passwd)


def main():
    """Runs the RCON client."""

    args = get_args()
    log_level = DEBUG if args.debug else INFO
    basicConfig(level=log_level, format=LOG_FORMAT)
    host, port, passwd = get_credentials(args.server)

    try:
        with Client(host, port, timeout=args.timeout) as client:
            client.login(passwd)
            text = client.run(args.command, *args.argument)
    except ConnectionRefusedError:
        LOGGER.error('Connection refused.')
        exit(3)
    except timeout:
        LOGGER.error('Connection timeout.')
        exit(4)
    except RequestIdMismatch:
        LOGGER.error('Unexpected request ID mismatch.')
        exit(5)
    except WrongPassword:
        LOGGER.error('Wrong password.')
        exit(6)
    else:
        print(text, flush=True)