# -*- coding: utf-8 -*-
# vpn
# Copyright (C) 2016-2017 LEAP
#
# 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 3 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, see <http://www.gnu.org/licenses/>.
"""
Bitmask Command Line interface: vpn module
"""
import argparse
import sys

from leap.bitmask.cli import command


class VPN(command.Command):
    service = 'vpn'
    usage = '''{name} vpn <subcommand>

Bitmask VPN Service

SUBCOMMANDS:

   enable     Enable VPN Service
   disable    Disable VPN Service
   start      Start VPN
   stop       Stop VPN
   status     Display status about the VPN
   check      Check whether VPN service is properly configured
   get_cert   Get VPN Certificate from provider
   install    Install helpers (needs root)
   uninstall  Uninstall helpers (needs root)

'''.format(name=command.appname)

    commands = ['stop', 'install', 'uninstall',
                'enable', 'disable']

    def start(self, raw_args):
        parser = argparse.ArgumentParser(
            description='Bitmask VPN start',
            prog='%s %s %s' % tuple(sys.argv[:3]))
        parser.add_argument('provider', nargs='?', default=None,
                            help='provider to start the VPN')
        subargs = parser.parse_args(raw_args)

        provider = None
        if subargs.provider:
            provider = subargs.provider
        else:
            uid = self.cfg.get('bonafide', 'active', default=None)
            try:
                _, provider = uid.split('@')
            except ValueError:
                error = ValueError()
                error.strerror = "A provider is needed to start the VPN"
                error.expected = True
                raise error

        self.data += ['start', provider]

        return self._send(command.default_dict_printer)

    def status(self, raw_args):
        self.data += ['status']
        return self._send(command.print_status)

    def check(self, raw_args):
        parser = argparse.ArgumentParser(
            description='Bitmask VPN check',
            prog='%s %s %s' % tuple(sys.argv[:3]))
        parser.add_argument('provider', nargs='?', default=None,
                            help='provider to check the VPN')
        subargs = parser.parse_args(raw_args)

        provider = ""
        if subargs.provider:
            provider = subargs.provider
        else:
            uid = self.cfg.get('bonafide', 'active', default=None)
            try:
                _, provider = uid.split('@')
            except ValueError:
                pass

        self.data += ['check', provider]

        return self._send(command.default_dict_printer)

    def get_cert(self, raw_args):
        parser = argparse.ArgumentParser(
            description='Bitmask VPN cert fetcher',
            prog='%s %s %s' % tuple(sys.argv[:3]))
        parser.add_argument('uid', nargs='?', default=None,
                            help='uid to fetch the VPN cert')
        subargs = parser.parse_args(raw_args)

        uid = None
        if subargs.uid:
            uid = subargs.uid
        else:
            uid = self.cfg.get('bonafide', 'active', default=None)
        self.data += ['get_cert', uid]

        return self._send(command.default_dict_printer)