# Copyright(c) 2016 Nippon Telegraph and Telephone Corporation
#
# 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.

from pbr import version as pbr_version

from masakarimonitors.i18n import _LE

MONITORS_VENDOR = "OpenStack Foundation"
MONITORS_PRODUCT = "OpenStack Masakari Monitors"
MONITORS_PACKAGE = None  # OS distro package version suffix

loaded = False
version_info = pbr_version.VersionInfo('masakarimonitors')
version_string = version_info.version_string


def _load_config():
    # Don't load in global context, since we can't assume
    # these modules are accessible when distutils uses
    # this module
    from six.moves import configparser

    from oslo_config import cfg

    from oslo_log import log as logging

    global loaded, MONITORS_VENDOR, MONITORS_PRODUCT, MONITORS_PACKAGE
    if loaded:
        return

    loaded = True

    cfgfile = cfg.CONF.find_file("release")
    if cfgfile is None:
        return

    try:
        cfg = configparser.RawConfigParser()
        cfg.read(cfgfile)

        if cfg.has_option("Masakarimonitors", "vendor"):
            MONITORS_VENDOR = cfg.get("Masakarimonitors", "vendor")

        if cfg.has_option("Masakarimonitors", "product"):
            MONITORS_PRODUCT = cfg.get("Masakarimonitors", "product")

        if cfg.has_option("Masakarimonitors", "package"):
            MONITORS_PACKAGE = cfg.get("Masakarimonitors", "package")
    except Exception as ex:
        LOG = logging.getLogger(__name__)
        LOG.error(_LE("Failed to load %(cfgfile)s: %(ex)s"),
                  {'cfgfile': cfgfile, 'ex': ex})


def vendor_string():
    _load_config()

    return MONITORS_VENDOR


def product_string():
    _load_config()

    return MONITORS_PRODUCT


def package_string():
    _load_config()

    return MONITORS_PACKAGE


def version_string_with_package():
    if package_string() is None:
        return version_info.version_string()
    else:
        return "%s-%s" % (version_info.version_string(), package_string())