# Copyright (c) Twisted Matrix Laboratories.
# See LICENSE for details.


"""
I am the support module for making a manhole server with twistd.
"""

from twisted.manhole import service
from twisted.spread import pb
from twisted.python import usage, util
from twisted.cred import portal, checkers
from twisted.application import strports


class Options(usage.Options):
    synopsis = "[options]"
    optParameters = [
           ["user", "u", "admin", "Name of user to allow to log in"],
           ["port", "p", str(pb.portno), "Port to listen on"],
    ]

    optFlags = [
        ["tracebacks", "T", "Allow tracebacks to be sent over the network"],
    ]

    compData = usage.Completions(
        optActions={"user": usage.CompleteUsernames()}
        )

    def opt_password(self, password):
        """Required.  '-' will prompt or read a password from stdin.
        """
        # If standard input is a terminal, I prompt for a password and
        # confirm it.  Otherwise, I use the first line from standard
        # input, stripping off a trailing newline if there is one.
        if password in ('', '-'):
            self['password'] = util.getPassword(confirm=1)
        else:
            self['password'] = password
    opt_w = opt_password

    def postOptions(self):
        if not self.has_key('password'):
            self.opt_password('-')

def makeService(config):
    port, user, password = config['port'], config['user'], config['password']
    p = portal.Portal(
        service.Realm(service.Service(config["tracebacks"], config.get('namespace'))),
        [checkers.InMemoryUsernamePasswordDatabaseDontUse(**{user: password})]
    )
    return strports.service(port, pb.PBServerFactory(p, config["tracebacks"]))