#!/usr/bin/env python

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# distributed with this work for additional information
# regarding copyright ownership.  The ASF licenses this file
# to you 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
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# KIND, either express or implied.  See the License for the
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import os
import sys
import threading
import signal
import logging.config
from getopt import getopt, GetoptError
from ConfigParser import ConfigParser

from tashi.util import signalHandler, boolean, instantiateImplementation, getConfig, debugConsole
import tashi

from tashi.rpycservices import rpycservices
from rpyc.utils.server import ThreadedServer
from rpyc.utils.authenticators import VdbAuthenticator

def startClusterManager(config):
	global service, data
	
	dfs = instantiateImplementation(config.get("ClusterManager", "dfs"), config)
	data = instantiateImplementation(config.get("ClusterManager", "data"), config)
	service = instantiateImplementation(config.get("ClusterManager", "service"), config, data, dfs)

	if boolean(config.get("Security", "authAndEncrypt")):
		users = {}
		userDatabase = data.getUsers()
		for user in userDatabase.values():
			if user.passwd != None:
				users[user.name] = user.passwd
		users[config.get('AllowedUsers', 'nodeManagerUser')] = config.get('AllowedUsers', 'nodeManagerPassword')
		users[config.get('AllowedUsers', 'agentUser')] = config.get('AllowedUsers', 'agentPassword')
		authenticator = VdbAuthenticator.from_dict(users)
		t = ThreadedServer(service=rpycservices.ManagerService, hostname='0.0.0.0', port=int(config.get('ClusterManagerService', 'port')), auto_register=False, authenticator=authenticator)
	else:
		t = ThreadedServer(service=rpycservices.ManagerService, hostname='0.0.0.0', port=int(config.get('ClusterManagerService', 'port')), auto_register=False)
	t.logger.setLevel(logging.ERROR)
	t.service.service = service
	t.service._type = 'ClusterManagerService'

	debugConsole(globals())
	
	try:
		t.start()
	except KeyboardInterrupt:
		handleSIGTERM(signal.SIGTERM, None)

@signalHandler(signal.SIGTERM)
def handleSIGTERM(signalNumber, stackFrame):
	log.info('Exiting cluster manager after receiving a SIGINT signal')
	sys.exit(0)
	
def main():
	global log
	
	# setup configuration and logging
	(config, configFiles) = getConfig(["ClusterManager"])
	publisher = instantiateImplementation(config.get("ClusterManager", "publisher"), config)
	tashi.publisher = publisher
	logging.config.fileConfig(configFiles)
	log = logging.getLogger(__file__)
	log.info('Using configuration file(s) %s' % configFiles)
	
	# bind the database
	log.info('Starting cluster manager')
	startClusterManager(config)

if __name__ == "__main__":
	main()