#!/usr/bin/python2.6

# Copyright (c) 2015, Oracle and/or its affiliates. All rights reserved.
#
#    Licensed under the Apache License, Version 2.0 (the "License"); you may
#    not use this file except in compliance with the License. You may obtain
#    a copy of the License at
#
#         http://www.apache.org/licenses/LICENSE-2.0
#
#    Unless required by applicable law or agreed to in writing, software
#    distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
#    WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
#    License for the specific language governing permissions and limitations
#    under the License.

import glob
import os
from subprocess import check_call, Popen, PIPE
import sys
import traceback

import iniparse
import smf_include
import sqlalchemy

from openstack_common import alter_mysql_tables, create_backups, modify_conf


NEUTRON_CONF_MAPPINGS = {
    # Deprecated group/name
    ('DEFAULT', 'rabbit_durable_queues'): ('DEFAULT', 'amqp_durable_queues'),
    ('rpc_notifier2', 'topics'): ('DEFAULT', 'notification_topics'),
    ('DEFAULT', 'matchmaker_ringfile'): ('matchmaker_ring', 'ringfile'),
    # As of Juno, EVS now uses the standard quota driver
    ('quotas', 'quota_driver'): (None, None),
}

NEUTRON_CONF_EXCEPTIONS = [
    ('DEFAULT', 'lockpath'),
    ('keystone_authtoken', 'auth_uri'),
    ('keystone_authtoken', 'identity_uri'),
    ('keystone_authtoken', 'admin_tenant_name'),
    ('keystone_authtoken', 'admin_user'),
    ('keystone_authtoken', 'admin_password'),
    ('keystone_authtoken', 'signing_dir'),
]


DHCP_AGENT_MAPPINGS = {
    # Deprecated group/name
    ('DEFAULT', 'dnsmasq_dns_server'): ('DEFAULT', 'dnsmasq_dns_servers'),
}

EVS_PLUGIN_MAPPINGS = {
    # No longer referenced by the service
    ('DATABASE', 'sql_connection'): (None, None),
}

L3_AGENT_EXCEPTIONS = [
    ('DEFAULT', 'enable_metadata_proxy'),
]

METADATA_AGENT_EXCEPTIONS = [
    ('DEFAULT', 'auth_url'),
    ('DEFAULT', 'auth_region'),
    ('DEFAULT', 'admin_tenant_name'),
    ('DEFAULT', 'admin_user'),
    ('DEFAULT', 'admin_password'),
    ('DEFAULT', 'metadata_workers'),
]


def start():
    # pull out the current version of config/upgrade-id
    p = Popen(['/usr/bin/svcprop', '-p', 'config/upgrade-id',
               os.environ['SMF_FMRI']], stdout=PIPE, stderr=PIPE)
    curr_ver, _err = p.communicate()
    curr_ver = curr_ver.strip()

    # extract the openstack-upgrade-id from the pkg
    p = Popen(['/usr/bin/pkg', 'contents', '-H', '-t', 'set', '-o', 'value',
               '-a', 'name=openstack.upgrade-id',
               'pkg:/cloud/openstack/neutron'], stdout=PIPE, stderr=PIPE)
    pkg_ver, _err = p.communicate()
    pkg_ver = pkg_ver.strip()

    if curr_ver == pkg_ver:
        # No need to upgrade
        sys.exit(smf_include.SMF_EXIT_OK)

    # look for any .new files
    db_connection = None
    if glob.glob('/etc/neutron/*.new'):
        # extract sql_connection from evs_plugin.ini
        db_connection = 'sqlite:////var/lib/neutron/neutron.sqlite'
        evs_ini = iniparse.RawConfigParser()
        evs_ini.read('/etc/neutron/plugins/evs/evs_plugin.ini')
        if evs_ini.has_section('DATABASE'):
            if evs_ini.has_option('DATABASE', 'sql_connection'):
                db_connection = evs_ini.get('DATABASE', 'sql_connection')

        # the versions are different, so perform an upgrade
        # modify the configuration files

        # backup all the old configuration files
        create_backups('/etc/neutron')

        modify_conf('/etc/neutron/api-paste.ini')
        modify_conf('/etc/neutron/dhcp_agent.ini', DHCP_AGENT_MAPPINGS)
        modify_conf('/etc/neutron/l3_agent.ini', None, L3_AGENT_EXCEPTIONS)
        modify_conf('/etc/neutron/neutron.conf', NEUTRON_CONF_MAPPINGS,
                    NEUTRON_CONF_EXCEPTIONS)
        modify_conf('/etc/neutron/plugins/evs/evs_plugin.ini',
                    EVS_PLUGIN_MAPPINGS)
        modify_conf('/etc/neutron/metadata_agent.ini', None,
                    METADATA_AGENT_EXCEPTIONS)

    config = iniparse.RawConfigParser()
    config.read('/etc/neutron/neutron.conf')
    # In certain cases the database section does not exist and the
    # default database chosen is sqlite.
    if config.has_section('database'):
        if db_connection:
            config.set('database', 'connection', db_connection)
            with open('/etc/neutron/neutron.conf', 'wb+') as fh:
                config.write(fh)
            if 'sqlite' in db_connection:
                print "WARNING: Neutron database is on sqlite"
                print "which is not a supported backend for"
                print "Solaris Openstack. Please make sure"
                print "to migrate to MySQL after upgrade to Juno"
        # Need this else part because this code path is exercised
        # during fresh install of Juno, when the
        # [database].connection is set to default mysql
        else:
            db_connection = config.get('database', 'connection')

        engine = sqlalchemy.create_engine(db_connection)

        # migrate EVS to Neutron db
        if engine.url.username != '%SERVICE_USER%':
            check_call(['/usr/lib/neutron/evs-neutron-migration'])
            print "EVS to Neutron migration complete"

            if engine.url.drivername == 'mysql':
                alter_mysql_tables(engine)
                print "altered character set to utf8 in neutron tables"

            check_call(['/usr/bin/neutron-db-manage', '--config-file',
                        '/etc/neutron/neutron.conf', '--config-file',
                        '/etc/neutron/plugins/evs/evs_plugin.ini', 'stamp',
                        'juno'])

    # update the current version
    check_call(['/usr/sbin/svccfg', '-s', os.environ['SMF_FMRI'], 'setprop',
               'config/upgrade-id', '=', pkg_ver])
    check_call(['/usr/sbin/svccfg', '-s', os.environ['SMF_FMRI'], 'refresh'])

    sys.exit(smf_include.SMF_EXIT_OK)


if __name__ == '__main__':
    os.putenv('LC_ALL', 'C')
    try:
        smf_include.smf_main()
    except RuntimeError:
        sys.exit(smf_include.SMF_EXIT_ERR_FATAL)
    except Exception as err:
        print 'Unknown error:  %s' % err
        print
        traceback.print_exc(file=sys.stdout)
        sys.exit(smf_include.SMF_EXIT_ERR_FATAL)