#!/usr/bin/python
# -*- coding: utf-8 -*-
#
# Copyright 2018 Univention GmbH
#
# http://www.univention.de/
#
# All rights reserved.
#
# The source code of this program is made available
# under the terms of the GNU Affero General Public License version 3
# (GNU AGPL V3) as published by the Free Software Foundation.
#
# Binary versions of this program provided by Univention to you as
# well as other copyrighted, protected or trademarked materials like
# Logos, graphics, fonts, specific documentations and configurations,
# cryptographic keys etc. are subject to a license agreement between
# you and Univention and not subject to the GNU AGPL V3.
#
# In the case you use this program under the terms of the GNU AGPL V3,
# the program is provided 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 Affero General Public License for more details.
#
# You should have received a copy of the GNU Affero General Public
# License with the Debian GNU/Linux or Univention distribution in file
# /usr/share/common-licenses/AGPL-3; if not, see
# <http://www.gnu.org/licenses/>.

import univention.admin.uldap
import univention.admin.license
import univention.config_registry

import os

EXPORTER_DIR = '/var/lib/prometheus/node-exporter'


def license_state(lo, ucr):
    license = lo.search(
        filter='(objectClass=univentionLicense)', attr=[
            'univentionLicenseBaseDN'])[0][1].get('univentionLicenseBaseDN')[0]
    if license == 'UCS Core Edition':
        return 2
    elif license == ucr.get('ldap/base'):  # Enterprise
        return 1
    else:
        return 3


if __name__ == '__main__':

    ucr = univention.config_registry.ConfigRegistry()
    ucr.load()
    lo, position = univention.admin.uldap.getMachineConnection()
    data = list()

    ldap_filter_users = univention.admin.license._license.filters['2'][univention.admin.license._license.USERS]
    ldap_filter_servers = '(&(|(objectClass=univentionDomainController)'
    '(objectClass=univentionMemberServer))(!(univentionObjectFlag=docker)))'

    users = len(lo.searchDn(filter=ldap_filter_users))
    clients = len(lo.searchDn(filter=univention.admin.license.LDAP_FILTER_managedclients))
    servers = len(lo.searchDn(filter=ldap_filter_servers))
    license = license_state(lo, ucr)

    data.append('ucs_user_count %s' % users)
    data.append('ucs_client_count %s' % clients)
    data.append('ucs_server_count %s' % servers)
    data.append('ucs_license %s' % license)

    master = ucr.get('ldap/master')

    ucs_domain_info = 'ucs_domain_info{ldap_master="%s"} 1' % master
    data.append(ucs_domain_info)

    tmp_filename = os.path.join(EXPORTER_DIR, 'ucs-domain-info.%s' % os.getpid())
    filename = os.path.join(EXPORTER_DIR, 'ucs-domain-info.prom')
    with open(tmp_filename, 'wb') as f:
        for d in data:
            f.write(d + '\n')
    os.rename(tmp_filename, filename)
