#!/usr/bin/env python
#
# Copyright (C) 2011, 2012 Nippon Telegraph and Telephone Corporation.
# Copyright (C) 2011 Isaku Yamahata <yamahata at valinux co jp>
#
# 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 gevent
import gflags
import logging
import sys

from gevent import monkey
monkey.patch_all()

from ryu import log
log.early_init_log(logging.DEBUG)

from ryu import version
from ryu import utils
from ryu.app import wsgi
from ryu.base.app_manager import AppManager
from ryu.controller import controller

# TODO:
#   Right now, we have our own patched copy of ovs python bindings
#   Once our modification is upstreamed and widely deployed,
#   use it
import ryu.contrib


FLAGS = gflags.FLAGS
gflags.DEFINE_bool('version', False, 'output version information and exit')
gflags.DEFINE_multistring('app_lists',
                          [],
                          'application module name to run')


def main():
    utils.find_flagfile()
    args = FLAGS(sys.argv)

    if FLAGS.version:
        print 'ryu-manager %s' % version
        sys.exit(0)

    log.init_log()

    # always enable ofp for now.
    FLAGS.app_lists += ['ryu.controller.ofp_handler']

    if len(args) > 1:
        FLAGS.app_lists += args[1:]

    app_mgr = AppManager()
    app_mgr.load_apps(FLAGS.app_lists)
    contexts = app_mgr.create_contexts()
    app_mgr.instantiate_apps(**contexts)

    services = []

    ctlr = controller.OpenFlowController()
    thr = gevent.spawn_later(0, ctlr)
    services.append(thr)

    webapp = wsgi.start_service(app_mgr)
    if webapp:
        thr = gevent.spawn_later(0, webapp)
        services.append(thr)

    gevent.joinall(services)
    app_mgr.close()


if __name__ == "__main__":
    main()