#!/usr/bin/env python3
# -*- coding: utf-8 -*-
#
# AWL simulator - Client interface
#
# Copyright 2013-2016 Michael Buesch <m@bues.ch>
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License along
# with this program; if not, write to the Free Software Foundation, Inc.,
# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
#

from __future__ import division, absolute_import, print_function, unicode_literals

import sys
import getopt

from awlsim_loader.common import *
from awlsim_loader.coreclient import *


class TextInterfaceAwlSimClient(AwlSimClient):
	pass

def usage():
	print("awlsim-client version %s" % VERSION_STRING)
	print("")
	print("Usage: awlsim-client [OPTIONS] <ACTIONS>")
	print("")
	print("Options:")
	print(" -C|--connect-to HOST[:PORT]  Connect to the server at HOST:PORT")
	print("                              Defaults to %s:%d" %\
		  (AwlSimServer.DEFAULT_HOST, AwlSimServer.DEFAULT_PORT))
	print(" -c|--connect                 Connect to default %s:%d" %\
		  (AwlSimServer.DEFAULT_HOST, AwlSimServer.DEFAULT_PORT))
	print(" -t|--timeout 10.0            Set the connection timeout (default 10 s)")
	print(" -L|--loglevel LVL            Set the client log level:")
	print("                              0: Log nothing")
	print("                              1: Log errors")
	print("                              2: Log errors and warnings (default)")
	print("                              3: Log errors, warnings and info messages")
	print("                              4: Verbose logging")
	print("                              5: Extremely verbose logging")
	print("")
	print("Actions to be performed on the server:")
	print(" -r|--runstate RUN/STOP       Set the run state of the CPU.")

def main():
	opt_connect = (AwlSimServer.DEFAULT_HOST, AwlSimServer.DEFAULT_PORT)
	opt_timeout = 10.0
	opt_loglevel = Logging.LOG_WARNING
	actions = []

	try:
		(opts, args) = getopt.getopt(sys.argv[1:],
			"hcC:t:L:r:",
			[ "help", "connect", "connect-to=", "timeout=", "loglevel=",
			  "runstate=", ])
	except getopt.GetoptError as e:
		printError(str(e))
		usage()
		return ExitCodes.EXIT_ERR_CMDLINE
	for (o, v) in opts:
		if o in ("-h", "--help"):
			usage()
			return ExitCodes.EXIT_OK
		if o in ("-c", "--connect"):
			opt_connect = (AwlSimServer.DEFAULT_HOST,
				       AwlSimServer.DEFAULT_PORT)
		if o in ("-C", "--connect-to"):
			try:
				host, port = parseNetAddress(v)
				if port is None:
					port = AwlSimServer.DEFAULT_PORT
				opt_connect = (host, port)
			except AwlSimError as e:
				printError("-c|--connect: %s" % e.message)
				sys.exit(1)
		if o in ("-t", "--timeout"):
			try:
				opt_timeout = float(v)
			except ValueError:
				printError("-t|--timeout: Invalid timeout value")
				sys.exit(1)
		if o in ("-L", "--loglevel"):
			try:
				opt_loglevel = int(v)
			except ValueError:
				printError("-L|--loglevel: Invalid log level")
				sys.exit(1)
		if o in ("-r", "--runstate"):
			if v.upper().strip() in ("RUN", "1", "START"):
				actions.append(("runstate", True))
			elif v.upper().strip() in ("STOP", "0"):
				actions.append(("runstate", False))
			else:
				printError("-r|--runstate: Invalid run state")
				sys.exit(1)
	if args:
		usage()
		return ExitCodes.EXIT_ERR_CMDLINE
	if not actions:
		usage()
		return ExitCodes.EXIT_ERR_CMDLINE

	client = None
	try:
		Logging.setLoglevel(opt_loglevel)

		client = TextInterfaceAwlSimClient()
		client.connectToServer(host = opt_connect[0],
				       port = opt_connect[1],
				       timeout = opt_timeout)

		for action, actionValue in actions:
			if action == "runstate":
				client.setRunState(actionValue)
			else:
				assert(0)
	except AwlSimError as e:
		printError(e.getReport())
		return ExitCodes.EXIT_ERR_SIM
	finally:
		if client:
			client.shutdown()

	return ExitCodes.EXIT_OK

if __name__ == "__main__":
	sys.exit(main())