#!/usr/bin/python2.7

# Copyright (c) 2014, 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 os
from subprocess import Popen, PIPE
import sys

import smf_include


def start():
    ironic_conf = sys.argv[2]

    # verify config path is valid
    if not os.path.exists(ironic_conf) or not os.access(ironic_conf, os.R_OK):
        print >> sys.stderr, '%s does not exist or is not readable' % \
            ironic_conf
        return smf_include.SMF_EXIT_ERR_CONFIG

    # Create/Sync Ironic database
    cmd = ["/usr/bin/ironic-dbsync", "--config-file", ironic_conf,
           "create_schema"]
    proc = Popen(cmd, stderr=PIPE, stdout=PIPE)
    _out, error = proc.communicate()

    if proc.returncode != 0:
        if "DbMigrationError" in error:
            # Attempted to create already existing database
            # Attempt to upgrade instead

            cmd = ["/usr/bin/ironic-dbsync", "--config-file", ironic_conf,
                   "upgrade"]
            proc = Popen(cmd, stderr=PIPE, stdout=PIPE)
            _out, error = proc.communicate()
            if proc.returncode != 0:
                print >> sys.stderr, \
                    'Error executing ironic-dbsync upgrade: %s' % error
                return smf_include.SMF_EXIT_ERR_FATAL
        else:
            print >> sys.stderr, \
                'Error executing ironic-dbsync create_schema: %s' % error
            return smf_include.SMF_EXIT_ERR_FATAL

    return smf_include.SMF_EXIT_OK

if __name__ == "__main__":
    os.putenv("LC_ALL", "C")
    smf_include.smf_main()