# Copyright (C) 2005-2012, 2016 Canonical Ltd
#
# 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.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA

"""UI integration points for dromedary.

Embedders should replace these functions to integrate with their UI.
The defaults provide basic functionality using the standard library.
"""


def report_transport_activity(transport, byte_count, direction):
    """Called during transport I/O to report activity. Default: no-op."""
    pass


def get_password(prompt="", **kwargs):
    """Prompt for a password. Default: uses getpass."""
    import getpass

    if kwargs:
        prompt = prompt % kwargs
    return getpass.getpass(prompt)


def get_username(prompt, **kwargs):
    """Prompt for a username. Default: uses input()."""
    if kwargs:
        prompt = prompt % kwargs
    return input(prompt)


def show_message(msg):
    """Show a message to the user. Default: print to stderr."""
    import sys

    print(msg, file=sys.stderr)
