#!@PYTHON@
#    This file is part of GNUnet.
#    (C) 2010 Christian Grothoff (and other contributing authors)
#
#    GNUnet 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, 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
#    General Public License for more details.
#
#    You should have received a copy of the GNU General Public License
#    along with GNUnet; see the file COPYING.  If not, write to the
#    Free Software Foundation, Inc., 59 Temple Place - Suite 330,
#    Boston, MA 02111-1307, USA.
#
# 
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', '# neighbour entries allocated',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', '# neighbour entries allocated',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', '# neighbour entries allocated',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', '# neighbour entries allocated',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)