# Author: Hubert Kario, (c) 2015
# Released under Gnu GPL v2.0, see LICENSE file for details
"""Example empty appd data test"""

from __future__ import print_function
import traceback
from random import sample
import sys
import re
import getopt

from tlsfuzzer.runner import Runner
from tlsfuzzer.messages import Connect, ClientHelloGenerator, \
        ClientKeyExchangeGenerator, ChangeCipherSpecGenerator, \
        FinishedGenerator, ApplicationDataGenerator, \
        AlertGenerator
from tlsfuzzer.expect import ExpectServerHello, ExpectCertificate, \
        ExpectServerHelloDone, ExpectChangeCipherSpec, ExpectFinished, \
        ExpectAlert, ExpectClose, ExpectApplicationData

from tlslite.constants import CipherSuite, AlertLevel, AlertDescription
from tlsfuzzer.utils.lists import natural_sort_keys


version = 3


def help_msg():
    print("Usage: <script-name> [-h hostname] [-p port] [[probe-name] ...]")
    print(" -h hostname    name of the host to run the test against")
    print("                localhost by default")
    print(" -p port        port number to use for connection, 4433 by default")
    print(" -e probe-name  exclude the probe from the list of the ones run")
    print("                may be specified multiple times")
    print(" -n num         run 'num' or all(if 0) tests instead of default(all)")
    print("                (excluding \"sanity\" tests)")
    print(" -x probe-name  expect the probe to fail. When such probe passes despite being marked like this")
    print("                it will be reported in the test summary and the whole script will fail.")
    print("                May be specified multiple times.")
    print(" -X message     expect the `message` substring in exception raised during")
    print("                execution of preceding expected failure probe")
    print("                usage: [-x probe-name] [-X exception], order is compulsory!")
    print(" --help         this message")


def main():
    """check if app data records with zero payload are accepted by server"""
    conversations = {}
    host = "localhost"
    port = 4433
    num_limit = None
    run_exclude = set()
    expected_failures = {}
    last_exp_tmp = None

    argv = sys.argv[1:]
    opts, argv = getopt.getopt(argv, "h:p:e:n:x:X:", ["help"])
    for opt, arg in opts:
        if opt == '-h':
            host = arg
        elif opt == '-p':
            port = int(arg)
        elif opt == '--help':
            help_msg()
            sys.exit(0)
        elif opt == '-e':
            run_exclude.add(arg)
        elif opt == '-n':
            num_limit = int(arg)
        elif opt == '-x':
            expected_failures[arg] = None
            last_exp_tmp = str(arg)
        elif opt == '-X':
            if not last_exp_tmp:
                raise ValueError("-x has to be specified before -X")
            expected_failures[last_exp_tmp] = str(arg)
        else:
            raise ValueError("Unknown option: {0}".format(opt))
    if argv:
        help_msg()
        raise ValueError("Unknown options: {0}".format(argv))

    conversation = Connect(host, port)
    node = conversation
    ciphers = [CipherSuite.TLS_RSA_WITH_AES_128_CBC_SHA,
               CipherSuite.TLS_EMPTY_RENEGOTIATION_INFO_SCSV]
    node = node.add_child(ClientHelloGenerator(ciphers))
    node = node.add_child(ExpectServerHello())
    node = node.add_child(ExpectCertificate())
    node = node.add_child(ExpectServerHelloDone())
    node = node.add_child(ClientKeyExchangeGenerator())
    node = node.add_child(ChangeCipherSpecGenerator())
    node = node.add_child(FinishedGenerator())
    node = node.add_child(ExpectChangeCipherSpec())
    node = node.add_child(ExpectFinished())
    node = node.add_child(ApplicationDataGenerator(bytearray(0)))
    text = b"GET / HTTP/1.0\nX-bad: aaaa\n\n"
    node = node.add_child(ApplicationDataGenerator(text))
    node = node.add_child(ExpectApplicationData())
    node = node.add_child(AlertGenerator(AlertLevel.warning,
                                         AlertDescription.close_notify))
    node = node.add_child(ExpectAlert(AlertLevel.warning,
                                      AlertDescription.close_notify))
    node.next_sibling = ExpectClose()
    node = node.add_child(ExpectClose())

    conversations["zero-length app data"] = \
            conversation

    # run the conversation
    good = 0
    bad = 0
    xfail = 0
    xpass = 0
    failed = []
    xpassed = []
    if not num_limit:
        num_limit = len(conversations)

    sampled_tests = sample(list(conversations.items()), len(conversations))

    for c_name, conversation in sampled_tests:
        if c_name in run_exclude:
            continue

        print("{0} ...".format(c_name))

        runner = Runner(conversation)

        res = True
        exception = None
        #because we don't want to abort the testing and we are reporting
        #the errors to the user, using a bare except is OK
        #pylint: disable=bare-except
        try:
            runner.run()
        except Exception as exp:
            exception = exp
            print("Error while processing")
            print(traceback.format_exc())
            res = False
        #pylint: enable=bare-except

        if c_name in expected_failures:
            if res:
                xpass += 1
                xpassed.append(c_name)
                print("XPASS-expected failure but test passed\n")
            else:
                if expected_failures[c_name] is not None and  \
                    expected_failures[c_name] not in str(exception):
                        bad += 1
                        failed.append(c_name)
                        print("Expected error message: {0}\n"
                            .format(expected_failures[c_name]))
                else:
                    xfail += 1
                    print("OK-expected failure\n")
        else:
            if res:
                good+=1
                print("OK")
            else:
                bad+=1

    print("Test end")
    print(20 * '=')
    print("version: {0}".format(version))
    print(20 * '=')
    print("TOTAL: {0}".format(len(sampled_tests)))
    print("SKIP: {0}".format(len(run_exclude.intersection(conversations.keys()))))
    print("PASS: {0}".format(good))
    print("XFAIL: {0}".format(xfail))
    print("FAIL: {0}".format(bad))
    print("XPASS: {0}".format(xpass))
    print(20 * '=')
    sort = sorted(xpassed ,key=natural_sort_keys)
    if len(sort):
        print("XPASSED:\n\t{0}".format('\n\t'.join(repr(i) for i in sort)))
    sort = sorted(failed, key=natural_sort_keys)
    if len(sort):
        print("FAILED:\n\t{0}".format('\n\t'.join(repr(i) for i in sort)))

    if bad or xpass:
        sys.exit(1)

if __name__ == "__main__":
    main()