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

# Copyright (c) 2010 - 2011, 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, TYPE_ACCOUNT

from VirtualMailManager.cli import read_pass

from VirtualMailManager.cli.config import CliConfig as Cfg

from VirtualMailManager.constants import ACCOUNT_EXISTS, INVALID_SECTION, \

     NO_SUCH_ACCOUNT

from VirtualMailManager.password import randompw

_ = 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()

    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):

        """Override the parent user_add() - add the interactive password

        dialog.

        Returns the generated password, if account.random_password == True.

        """

        acc = self._get_account(emailaddress)

        if acc:

            raise VMMError(_(u"The account '%s' already exists.") %

                           acc.address, ACCOUNT_EXISTS)

        rand_pass = self._cfg.dget('account.random_password')

        if password is None:

            password = (read_pass, randompw)[rand_pass]()

        acc.set_password(password)

        acc.save()

        self._make_account_dirs(acc)

        return (None, password)[rand_pass]

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

        """Override the parent user_password() - add the interactive

        password dialog."""

        acc = self._get_account(emailaddress)

        if not acc:

            raise VMMError(_(u"The account '%s' does not exist.") %

                           acc.address, NO_SUCH_ACCOUNT)

        if not isinstance(password, basestring) or not password:

            password = read_pass()

        acc.modify('password', password)

del _