#!/usr/bin/env python3

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

# Copyright (c) 2008 - 2013, Pascal Volk

# See COPYING for distribution information.

import os

os.sys.path.remove(os.sys.path[0])

from time import time

from configparser import ConfigParser

from shutil import copy2

pre_060 = False

try:

    from VirtualMailManager.constants.VERSION import VERSION

    pre_060 = True

except ImportError:

    try:

        from VirtualMailManager.constants import VERSION

    except ImportError:

        os.sys.stderr.write('error: no vmm version information found\n')

        raise SystemExit(2)

# we have to remove the old CamelCase files

if pre_060:

    import VirtualMailManager

    vmm_inst_dir = os.path.dirname(VirtualMailManager.__file__)

    tmp_info = open('/tmp/vmm_inst_dir', 'w')

    tmp_info.write(vmm_inst_dir)

    tmp_info.close()

try:

    import psycopg2

except ImportError:

    has_psycopg2 = False

else:

    has_psycopg2 = True

def get_config_file():

    f = None

    for d in ('/root', '/usr/local/etc', '/etc'):

        tmp = os.path.join(d, 'vmm.cfg')

        if os.path.isfile(tmp):

            f = tmp

            break

    if f:

        return f

    else:

        os.sys.stderr.write('error: vmm.cfg not found\n')

        raise SystemExit(2)

def update(cp):

    if VERSION == '0.5.2':

        upd_052(cp)

    elif VERSION == '0.6.0':

        os.sys.stdout.write('info: vmm.cfg: nothing to do for version %s\n' %

                            VERSION)

        return

    else:

        os.sys.stderr.write('error: the version %s is not supported by this '

                            'script\n' % VERSION)

        raise SystemExit(3)

def get_cfg_parser(cf):

    fh = open(cf, 'r')

    cp = ConfigParser()

    cp.readfp(fh)

    fh.close()

    return cp

def update_cfg_file(cp, cf):

    copy2(cf, cf + '.bak.' + str(time()))

    fh = open(cf, 'w')

    cp.write(fh)

    fh.close()

def add_sections(cp, sections):

    for section in sections:

        if not cp.has_section(section):

            cp.add_section(section)

def move_option(cp, src, dst):

    ds, do = dst.split('.')

    if not cp.has_option(ds, do):

        ss, so = src.split('.')

        cp.set(ds, do, cp.get(ss, so))

        cp.remove_option(ss, so)

        sect_opt.append((dst, 'R'))

def add_option(cp, dst, val):

    ds, do = dst.split('.')

    if not cp.has_option(ds, do):

        cp.set(ds, do, val)

        sect_opt.append((dst, 'N'))

def set_dovecot_version(cp):

    if len(os.sys.argv) > 1:

        dovecot_version = os.sys.argv[1].strip()

        if not dovecot_version:

            dovecot_version = '1.2.11'

    else:

        dovecot_version = '1.2.11'

    cp.set('misc', 'dovecot_version', dovecot_version)

    sect_opt.append(('misc.dovecot_version', 'M'))

def get_option(cp, src):

    ss, so = src.split('.')

    return cp.get(ss, so)

def upd_052(cp):

    global had_config

    global had_gid_mail

    had_config = cp.remove_section('config')

    had_gid_mail = cp.remove_option('misc', 'gid_mail')

    add_sections(cp, ('domain', 'account', 'mailbox'))

    if cp.has_section('domdir'):

        for src, dst in (('domdir.mode',   'domain.directory_mode'),

                         ('domdir.delete', 'domain.delete_directory'),

                         ('domdir.base',   'misc.base_directory')):

            move_option(cp, src, dst)

        cp.remove_section('domdir')

    if cp.has_section('services'):

        for service in cp.options('services'):

            move_option(cp, 'services.%s' % service, 'domain.%s' % service)

        cp.remove_section('services')

    for src, dst in (('maildir.mode',      'account.directory_mode'),

                     ('maildir.diskusage', 'account.disk_usage'),

                     ('maildir.delete',    'account.delete_directory'),

                     ('maildir.folders',   'mailbox.folders'),

                     ('maildir.name',      'mailbox.root'),

                     ('misc.forcedel',     'domain.force_deletion'),

                     ('misc.transport',    'domain.transport'),

                     ('misc.passwdscheme', 'misc.password_scheme'),

                     ('misc.dovecotvers',  'misc.dovecot_version')):

        move_option(cp, src, dst)

    cp.remove_section('maildir')

    if not has_psycopg2:

        add_option(cp, 'database.module', 'pyPgSQL')

    set_dovecot_version(cp)

# def main():

if __name__ == '__main__':

    sect_opt = []

    had_config = False

    had_gid_mail = False

    cf = get_config_file()

    cp = get_cfg_parser(cf)

    update(cp)

    if len(sect_opt):

        update_cfg_file(cp, cf)

        sect_opt.sort()

        print('Please have a look at your configuration: %s' % cf)

        print('This are your Modified/Renamed/New settings:')

        for s_o, st in sect_opt:

            print('%s   %s = %s' % (st, s_o, get_option(cp, s_o)))

        if had_config:

            print('\nRemoved section "config" with option "done" (obsolte)')

        if had_gid_mail:

            print('\nRemoved option "gid_mail" from section "misc"',

                  '(obsolte)\n')

        os.sys.exit(0)

    if had_config or had_gid_mail:

        update_cfg_file(cp, cf)

        if had_config:

            print('\nRemoved section "config" with option "done" (obsolte)')

        if had_gid_mail:

            print('\nRemoved option "gid_mail" from section "misc"',

                  '(obsolte)\n')