# -*- coding: UTF-8 -*-

# Copyright (c) 2010, Pascal Volk

# See COPYING for distribution information.

"""

    VirtualMailManager.cli.handler

    ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

    A derived Handler class with a few changes/additions for cli use.

"""

import os

from VirtualMailManager.errors import VMMError

from VirtualMailManager.handler import Handler

from VirtualMailManager.cli import read_pass

from VirtualMailManager.cli.config import CliConfig as Cfg

from VirtualMailManager.constants import INVALID_SECTION

_ = lambda msg: msg

class CliHandler(Handler):

    """This class uses a `CliConfig` for configuration stuff, instead of

    the non-interactive `Config` class.

    It provides the additional methods cfgSet() and configure().

    Additionally it uses `VirtualMailManager.cli.read_pass()` for for the

    interactive password dialog.

    """

    __slots__ = ()  # nothing additional, also no __dict__/__weakref__

    def __init__(self):

        """Creates a new CliHandler instance.

        Throws a NotRootError if your uid is greater 0.

        """

        # Overwrite the parent CTor partly, we use the CliConfig class

        # and add some command line checks.

        skip_some_checks = os.sys.argv[1] in ('cf', 'configure', 'h', 'help',

                                              'v', 'version')

        super(CliHandler, self).__init__(skip_some_checks)

        self._cfg = Cfg(self._cfg_fname)

        self._cfg.load()

        if not skip_some_checks:

            self._cfg.check()

            self._chkenv()

    def cfg_set(self, option, value):

        """Set a new value for the given option."""

        return self._cfg.set(option, value)

    def configure(self, section=None):

        """Starts the interactive configuration.

        Configures in interactive mode options in the given ``section``.

        If no section is given (default) all options from all sections

        will be prompted.

        """

        if section is None:

            self._cfg.configure(self._cfg.sections())

        elif self._cfg.has_section(section):

            self._cfg.configure([section])

        else:

            raise VMMError(_(u'Invalid section: “%s”') % section,

                           INVALID_SECTION)

    def user_add(self, emailaddress, password=None):

        """Prefix the parent user_add() with the interactive password

        dialog."""

        if password is None:

            password = read_pass()

        super(CliHandler, self).user_add(emailaddress, password)

    def user_password(self, emailaddress, password=None):

        """Prefix the parent user_password() with the interactive password

        dialog."""

        if password is None:

            password = read_pass()

        super(CliHandler, self).user_password(emailaddress, password)

del _