#!/usr/bin/env python
#
#    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.

"""
Heat API Server. An OpenStack ReST API to Heat.
"""

import eventlet
eventlet.monkey_patch(os=False)

import os
import sys

# If ../heat/__init__.py exists, add ../ to Python search path, so that
# it will override what happens to be installed in /usr/(local/)lib/python...
possible_topdir = os.path.normpath(os.path.join(os.path.abspath(sys.argv[0]),
                                   os.pardir,
                                   os.pardir))
if os.path.exists(os.path.join(possible_topdir, 'heat', '__init__.py')):
    sys.path.insert(0, possible_topdir)

from oslo.config import cfg

from heat.common import config
from heat.common import messaging
from heat.common import wsgi
from heat.openstack.common import gettextutils
from heat.openstack.common import log as logging
from heat.openstack.common import systemd

gettextutils.enable_lazy()
gettextutils.install('heat', lazy=True)

LOG = logging.getLogger('heat.api')

if __name__ == '__main__':
    try:
        cfg.CONF(project='heat', prog='heat-api')
        logging.setup('heat')
        messaging.setup()

        app = config.load_paste_app()

        port = cfg.CONF.heat_api.bind_port
        host = cfg.CONF.heat_api.bind_host
        LOG.info(_('Starting Heat ReST API on %(host)s:%(port)s'),
                 {'host': host, 'port': port})
        server = wsgi.Server()
        server.start(app, cfg.CONF.heat_api, default_port=port)
        systemd.notify_once()
        server.wait()
    except RuntimeError as e:
        sys.exit("ERROR: %s" % e)