#!@PYTHON@
#    This file is part of GNUnet.
#    (C) 2010, 2017 Christian Grothoff (and other contributing authors)
#
#    GNUnet is free software: you can redistribute it and/or modify it
#    under the terms of the GNU Affero General Public License as published
#    by the Free Software Foundation, either version 3 of the License,
#    or (at your option) any later version.
#
#    GNUnet 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
#    Affero General Public License for more details.
#
#    You should have received a copy of the GNU Affero General Public License
#    along with this program.  If not, see <http://www.gnu.org/licenses/>.
#
#    SPDX-License-Identifier: AGPL3.0-or-later
#
#

import sys
import os
import subprocess
import re
import shutil
import time
import signal
from gnunet_testing import Peer
from gnunet_testing import Test
from gnunet_testing import Check
from gnunet_testing import Condition
from gnunet_testing import *


#
# This test tests if a fresh peer bootstraps from a hostlist server and then
# successfully connects to the server. When both peers are connected
# in transport, core, topology, fs, botth peers are shutdown and restarted
#
# Conditions for successful exit:
# Both peers have 1 connected peer in transport, core, topology, fs after restart

#definitions


testname = "test_integration_restart"
verbose = True
check_timeout = 180

if os.name == "nt":
  tmp = os.getenv ("TEMP")
  signals = [signal.SIGTERM, signal.SIGINT]
else:
  tmp = "/tmp"
  signals = [signal.SIGTERM, signal.SIGINT, signal.SIGHUP, signal.SIGQUIT]

def cleanup_onerror (function, path, excinfo):
  import stat
  if not os.path.exists (path):
    pass
  elif not os.access(path, os.W_OK):
    # Is the error an access error ?
    os.chmod (path, stat.S_IWUSR)
    function (path)
  else:
    raise

def cleanup ():
    retries = 10
    path = os.path.join (tmp, "c_bootstrap_server")
    test.p ("Removing " + path)
    while ((os.path.exists(path)) and (retries > 0)):
        shutil.rmtree ((path), False, cleanup_onerror)
        time.sleep (1)
        retries -= 1
    if (os.path.exists(path)):
        test.p ("Failed to remove " + path)


    retries = 10
    path = os.path.join (tmp, "c_no_nat_client")
    test.p ("Removing " + path)
    while ((os.path.exists(path)) and (retries > 0)):
        shutil.rmtree ((path), False, cleanup_onerror)
        time.sleep (1)
        retries -= 1
    if (os.path.exists(path)):
        test.p ("Failed to remove " + path)

def success_restart_cont (check):
	global success
	print('Peers connected successfully after restart')
	server.stop ()
	client.stop ()
	success = True;


def fail_restart_cont (check):
	global success
	success = False;
	print('Peers failed to connect after restart')
	check.evaluate(True)


def success_connect_cont (check):
	print('Peers connected successfully')
	server.stop ()
	client.stop ()

	time.sleep(5)

	test.p ('Restarting client & server')
	server.start ()
	client.start ()

	check = Check (test)
	check.add (StatisticsCondition (client, 'transport', '# peers connected',1))
	check.add (StatisticsCondition (client, 'core', '# peers connected',1))
	check.add (StatisticsCondition (client, 'topology', '# peers connected',1))
	check.add (StatisticsCondition (client, 'fs', '# peers connected',1))

	check.add (StatisticsCondition (server, 'transport', '# peers connected',1))
	check.add (StatisticsCondition (server, 'core', '# peers connected',1))
	check.add (StatisticsCondition (server, 'topology', '# peers connected',1))
	check.add (StatisticsCondition (server, 'fs', '# peers connected',1))

	check.run_blocking (check_timeout, success_restart_cont, fail_restart_cont)


def fail_connect_cont (check):
	global success
	success= False;
	print('Peers failed to connect')
	check.evaluate(True)


def check_connect ():
	check = Check (test)
	check.add (StatisticsCondition (client, 'transport', '# peers connected',1))
	check.add (StatisticsCondition (client, 'core', '# peers connected',1))
	check.add (StatisticsCondition (client, 'topology', '# peers connected',1))
	check.add (StatisticsCondition (client, 'fs', '# peers connected',1))

	check.add (StatisticsCondition (server, 'transport', '# peers connected',1))
	check.add (StatisticsCondition (server, 'core', '# peers connected',1))
	check.add (StatisticsCondition (server, 'topology', '# peers connected',1))
	check.add (StatisticsCondition (server, 'fs', '# peers connected',1))

	check.run_blocking (check_timeout, success_connect_cont, fail_connect_cont)

#
# Test execution
#


def SigHandler(signum = None, frame = None):
	global success
	global server
	global client

	print('Test was aborted!')
	if (None != server):
		server.stop ()
	if (None != client):
		client.stop ()
	cleanup ()
	sys.exit(success)

def run ():
	global success
	global test
	global server
	global client

	success = False
	server = None
	client = None

	for sig in signals:
		signal.signal(sig, SigHandler)


	test = Test ('test_integration_disconnect', verbose)
	cleanup ()
	server = Peer(test, './confs/c_bootstrap_server.conf');
	server.start();

	client = Peer(test, './confs/c_no_nat_client.conf');
	client.start();


	if (True != server.start()):
		print('Failed to start server')
		if (None != server):
			server.stop ()
		if (None != server):
			client.stop ()
		cleanup ()
		sys.exit(success)

	# Give the server time to start
	time.sleep(5)

	if (True != client.start()):
		print('Failed to start client')
		if (None != server):
			server.stop ()
		if (None != server):
			client.stop ()
		cleanup ()
		sys.exit(success)

	check_connect ()

	server.stop ()
	client.stop ()
	cleanup ()

	if (success == False):
		print ('Test failed')
		return True
	else:
		return False


try:
    run ()
except (KeyboardInterrupt, SystemExit):
    print('Test interrupted')
    server.stop ()
    client.stop ()
    cleanup ()
if (success == False):
	sys.exit(1)
else:
	sys.exit(0)
