"""Tests for certbot.auth_handler."""
import functools
import logging
import unittest

import mock
import six
import zope.component

from acme import challenges
from acme import client as acme_client
from acme import messages

from certbot import achallenges
from certbot import errors
from certbot import interfaces
from certbot import util

from certbot.tests import acme_util
from certbot.tests import util as test_util


class ChallengeFactoryTest(unittest.TestCase):
    # pylint: disable=protected-access

    def setUp(self):
        from certbot.auth_handler import AuthHandler

        # Account is mocked...
        self.handler = AuthHandler(None, None, mock.Mock(key="mock_key"), [])

        self.authzr = acme_util.gen_authzr(
            messages.STATUS_PENDING, "test", acme_util.CHALLENGES,
            [messages.STATUS_PENDING] * 6, False)

    def test_all(self):
        achalls = self.handler._challenge_factory(
            self.authzr, range(0, len(acme_util.CHALLENGES)))

        self.assertEqual(
            [achall.chall for achall in achalls], acme_util.CHALLENGES)

    def test_one_tls_sni(self):
        achalls = self.handler._challenge_factory(self.authzr, [1])

        self.assertEqual(
            [achall.chall for achall in achalls], [acme_util.TLSSNI01])

    def test_unrecognized(self):
        authzr = acme_util.gen_authzr(
             messages.STATUS_PENDING, "test",
             [mock.Mock(chall="chall", typ="unrecognized")],
             [messages.STATUS_PENDING])

        self.assertRaises(
             errors.Error, self.handler._challenge_factory, authzr, [0])


class HandleAuthorizationsTest(unittest.TestCase):
    """handle_authorizations test.

    This tests everything except for all functions under _poll_challenges.

    """

    def setUp(self):
        from certbot.auth_handler import AuthHandler

        self.mock_display = mock.Mock()
        zope.component.provideUtility(
            self.mock_display, interfaces.IDisplay)
        zope.component.provideUtility(
            mock.Mock(debug_challenges=False), interfaces.IConfig)

        self.mock_auth = mock.MagicMock(name="ApacheConfigurator")

        self.mock_auth.get_chall_pref.return_value = [challenges.TLSSNI01]

        self.mock_auth.perform.side_effect = gen_auth_resp

        self.mock_account = mock.Mock(key=util.Key("file_path", "PEM"))
        self.mock_net = mock.MagicMock(spec=acme_client.Client)
        self.mock_net.acme_version = 1

        self.handler = AuthHandler(
            self.mock_auth, self.mock_net, self.mock_account, [])

        logging.disable(logging.CRITICAL)

    def tearDown(self):
        logging.disable(logging.NOTSET)

    def _test_name1_tls_sni_01_1_common(self, combos):
        authzr = gen_dom_authzr(domain="0", challs=acme_util.CHALLENGES, combos=combos)
        mock_order = mock.MagicMock(authorizations=[authzr])

        with mock.patch("certbot.auth_handler.AuthHandler._poll_challenges") as mock_poll:
            mock_poll.side_effect = self._validate_all
            authzr = self.handler.handle_authorizations(mock_order)

        self.assertEqual(self.mock_net.answer_challenge.call_count, 1)

        self.assertEqual(mock_poll.call_count, 1)
        chall_update = mock_poll.call_args[0][1]
        self.assertEqual(list(six.iterkeys(chall_update)), [0])
        self.assertEqual(len(chall_update.values()), 1)

        self.assertEqual(self.mock_auth.cleanup.call_count, 1)
        # Test if list first element is TLSSNI01, use typ because it is an achall
        self.assertEqual(
            self.mock_auth.cleanup.call_args[0][0][0].typ, "tls-sni-01")

        self.assertEqual(len(authzr), 1)

    def test_name1_tls_sni_01_1_acme_1(self):
        self._test_name1_tls_sni_01_1_common(combos=True)

    def test_name1_tls_sni_01_1_acme_2(self):
        self.mock_net.acme_version = 2
        self._test_name1_tls_sni_01_1_common(combos=False)

    @mock.patch("certbot.auth_handler.AuthHandler._poll_challenges")
    def test_name1_tls_sni_01_1_http_01_1_dns_1_acme_1(self, mock_poll):
        mock_poll.side_effect = self._validate_all
        self.mock_auth.get_chall_pref.return_value.append(challenges.HTTP01)
        self.mock_auth.get_chall_pref.return_value.append(challenges.DNS01)

        authzr = gen_dom_authzr(domain="0", challs=acme_util.CHALLENGES, combos=False)
        mock_order = mock.MagicMock(authorizations=[authzr])
        authzr = self.handler.handle_authorizations(mock_order)

        self.assertEqual(self.mock_net.answer_challenge.call_count, 3)

        self.assertEqual(mock_poll.call_count, 1)
        chall_update = mock_poll.call_args[0][1]
        self.assertEqual(list(six.iterkeys(chall_update)), [0])
        self.assertEqual(len(chall_update.values()), 1)

        self.assertEqual(self.mock_auth.cleanup.call_count, 1)
        # Test if list first element is TLSSNI01, use typ because it is an achall
        for achall in self.mock_auth.cleanup.call_args[0][0]:
            self.assertTrue(achall.typ in ["tls-sni-01", "http-01", "dns-01"])

        # Length of authorizations list
        self.assertEqual(len(authzr), 1)

    @mock.patch("certbot.auth_handler.AuthHandler._poll_challenges")
    def test_name1_tls_sni_01_1_http_01_1_dns_1_acme_2(self, mock_poll):
        self.mock_net.acme_version = 2
        mock_poll.side_effect = self._validate_all
        self.mock_auth.get_chall_pref.return_value.append(challenges.HTTP01)
        self.mock_auth.get_chall_pref.return_value.append(challenges.DNS01)

        authzr = gen_dom_authzr(domain="0", challs=acme_util.CHALLENGES, combos=False)
        mock_order = mock.MagicMock(authorizations=[authzr])
        authzr = self.handler.handle_authorizations(mock_order)

        self.assertEqual(self.mock_net.answer_challenge.call_count, 1)

        self.assertEqual(mock_poll.call_count, 1)
        chall_update = mock_poll.call_args[0][1]
        self.assertEqual(list(six.iterkeys(chall_update)), [0])
        self.assertEqual(len(chall_update.values()), 1)

        self.assertEqual(self.mock_auth.cleanup.call_count, 1)
        cleaned_up_achalls = self.mock_auth.cleanup.call_args[0][0]
        self.assertEqual(len(cleaned_up_achalls), 1)
        self.assertEqual(cleaned_up_achalls[0].typ, "tls-sni-01")

        # Length of authorizations list
        self.assertEqual(len(authzr), 1)

    def _test_name3_tls_sni_01_3_common(self, combos):
        self.mock_net.request_domain_challenges.side_effect = functools.partial(
            gen_dom_authzr, challs=acme_util.CHALLENGES, combos=combos)


        authzrs = [gen_dom_authzr(domain="0", challs=acme_util.CHALLENGES),
                   gen_dom_authzr(domain="1", challs=acme_util.CHALLENGES),
                   gen_dom_authzr(domain="2", challs=acme_util.CHALLENGES)]
        mock_order = mock.MagicMock(authorizations=authzrs)
        with mock.patch("certbot.auth_handler.AuthHandler._poll_challenges") as mock_poll:
            mock_poll.side_effect = self._validate_all
            authzr = self.handler.handle_authorizations(mock_order)

        self.assertEqual(self.mock_net.answer_challenge.call_count, 3)

        # Check poll call
        self.assertEqual(mock_poll.call_count, 1)
        chall_update = mock_poll.call_args[0][1]
        self.assertEqual(len(list(six.iterkeys(chall_update))), 3)
        self.assertTrue(0 in list(six.iterkeys(chall_update)))
        self.assertEqual(len(chall_update[0]), 1)
        self.assertTrue(1 in list(six.iterkeys(chall_update)))
        self.assertEqual(len(chall_update[1]), 1)
        self.assertTrue(2 in list(six.iterkeys(chall_update)))
        self.assertEqual(len(chall_update[2]), 1)

        self.assertEqual(self.mock_auth.cleanup.call_count, 1)

        self.assertEqual(len(authzr), 3)

    def test_name3_tls_sni_01_3_common_acme_1(self):
        self._test_name3_tls_sni_01_3_common(combos=True)

    def test_name3_tls_sni_01_3_common_acme_2(self):
        self.mock_net.acme_version = 2
        self._test_name3_tls_sni_01_3_common(combos=False)

    @mock.patch("certbot.auth_handler.AuthHandler._poll_challenges")
    def test_debug_challenges(self, mock_poll):
        zope.component.provideUtility(
            mock.Mock(debug_challenges=True), interfaces.IConfig)
        authzrs = [gen_dom_authzr(domain="0", challs=acme_util.CHALLENGES)]
        mock_order = mock.MagicMock(authorizations=authzrs)

        mock_poll.side_effect = self._validate_all

        self.handler.handle_authorizations(mock_order)

        self.assertEqual(self.mock_net.answer_challenge.call_count, 1)
        self.assertEqual(self.mock_display.notification.call_count, 1)

    def test_perform_failure(self):
        authzrs = [gen_dom_authzr(domain="0", challs=acme_util.CHALLENGES)]
        mock_order = mock.MagicMock(authorizations=authzrs)

        self.mock_auth.perform.side_effect = errors.AuthorizationError

        self.assertRaises(
            errors.AuthorizationError, self.handler.handle_authorizations, mock_order)

    def test_no_domains(self):
        mock_order = mock.MagicMock(authorizations=[])
        self.assertRaises(errors.AuthorizationError, self.handler.handle_authorizations, mock_order)

    def _test_preferred_challenge_choice_common(self, combos):
        authzrs = [gen_dom_authzr(domain="0", challs=acme_util.CHALLENGES, combos=combos)]
        mock_order = mock.MagicMock(authorizations=authzrs)

        self.mock_auth.get_chall_pref.return_value.append(challenges.HTTP01)

        self.handler.pref_challs.extend((challenges.HTTP01.typ,
                                         challenges.DNS01.typ,))

        with mock.patch("certbot.auth_handler.AuthHandler._poll_challenges") as mock_poll:
            mock_poll.side_effect = self._validate_all
            self.handler.handle_authorizations(mock_order)

        self.assertEqual(self.mock_auth.cleanup.call_count, 1)
        self.assertEqual(
            self.mock_auth.cleanup.call_args[0][0][0].typ, "http-01")

    def test_preferred_challenge_choice_common_acme_1(self):
        self._test_preferred_challenge_choice_common(combos=True)

    def test_preferred_challenge_choice_common_acme_2(self):
        self.mock_net.acme_version = 2
        self._test_preferred_challenge_choice_common(combos=False)

    def _test_preferred_challenges_not_supported_common(self, combos):
        authzrs = [gen_dom_authzr(domain="0", challs=acme_util.CHALLENGES, combos=combos)]
        mock_order = mock.MagicMock(authorizations=authzrs)
        self.handler.pref_challs.append(challenges.HTTP01.typ)
        self.assertRaises(
            errors.AuthorizationError, self.handler.handle_authorizations, mock_order)

    def test_preferred_challenges_not_supported_acme_1(self):
        self._test_preferred_challenges_not_supported_common(combos=True)

    def test_preferred_challenges_not_supported_acme_2(self):
        self.mock_net.acme_version = 2
        self._test_preferred_challenges_not_supported_common(combos=False)

    def test_dns_only_challenge_not_supported(self):
        authzrs = [gen_dom_authzr(domain="0", challs=[acme_util.DNS01])]
        mock_order = mock.MagicMock(authorizations=authzrs)
        self.assertRaises(
            errors.AuthorizationError, self.handler.handle_authorizations, mock_order)

    def test_perform_error(self):
        self.mock_auth.perform.side_effect = errors.AuthorizationError

        authzr = gen_dom_authzr(domain="0", challs=acme_util.CHALLENGES, combos=True)
        mock_order = mock.MagicMock(authorizations=[authzr])
        self.assertRaises(errors.AuthorizationError, self.handler.handle_authorizations, mock_order)

        self.assertEqual(self.mock_auth.cleanup.call_count, 1)
        self.assertEqual(
            self.mock_auth.cleanup.call_args[0][0][0].typ, "tls-sni-01")

    @mock.patch("certbot.auth_handler.AuthHandler._respond")
    def test_respond_error(self, mock_respond):
        authzrs = [gen_dom_authzr(domain="0", challs=acme_util.CHALLENGES)]
        mock_order = mock.MagicMock(authorizations=authzrs)
        mock_respond.side_effect = errors.AuthorizationError

        self.assertRaises(
            errors.AuthorizationError, self.handler.handle_authorizations, mock_order)
        self.assertEqual(self.mock_auth.cleanup.call_count, 1)
        self.assertEqual(
            self.mock_auth.cleanup.call_args[0][0][0].typ, "tls-sni-01")

    @mock.patch("certbot.auth_handler.AuthHandler._poll_challenges")
    @mock.patch("certbot.auth_handler.AuthHandler.verify_authzr_complete")
    def test_incomplete_authzr_error(self, mock_verify, mock_poll):
        authzrs = [gen_dom_authzr(domain="0", challs=acme_util.CHALLENGES)]
        mock_order = mock.MagicMock(authorizations=authzrs)
        mock_verify.side_effect = errors.AuthorizationError
        mock_poll.side_effect = self._validate_all

        self.assertRaises(
            errors.AuthorizationError, self.handler.handle_authorizations, mock_order)
        self.assertEqual(self.mock_auth.cleanup.call_count, 1)
        self.assertEqual(
            self.mock_auth.cleanup.call_args[0][0][0].typ, "tls-sni-01")

    def _validate_all(self, aauthzrs, unused_1, unused_2):
        for i, aauthzr in enumerate(aauthzrs):
            azr = aauthzr.authzr
            updated_azr = acme_util.gen_authzr(
                messages.STATUS_VALID,
                azr.body.identifier.value,
                [challb.chall for challb in azr.body.challenges],
                [messages.STATUS_VALID] * len(azr.body.challenges),
                azr.body.combinations)
            aauthzrs[i] = type(aauthzr)(updated_azr, aauthzr.achalls)


class PollChallengesTest(unittest.TestCase):
    # pylint: disable=protected-access
    """Test poll challenges."""

    def setUp(self):
        from certbot.auth_handler import challb_to_achall
        from certbot.auth_handler import AuthHandler, AnnotatedAuthzr

        # Account and network are mocked...
        self.mock_net = mock.MagicMock()
        self.handler = AuthHandler(
            None, self.mock_net, mock.Mock(key="mock_key"), [])

        self.doms = ["0", "1", "2"]
        self.aauthzrs = [
            AnnotatedAuthzr(acme_util.gen_authzr(
                messages.STATUS_PENDING, self.doms[0],
                [acme_util.HTTP01, acme_util.TLSSNI01],
                [messages.STATUS_PENDING] * 2, False), []),
            AnnotatedAuthzr(acme_util.gen_authzr(
                messages.STATUS_PENDING, self.doms[1],
                acme_util.CHALLENGES, [messages.STATUS_PENDING] * 3, False), []),
            AnnotatedAuthzr(acme_util.gen_authzr(
                messages.STATUS_PENDING, self.doms[2],
                acme_util.CHALLENGES, [messages.STATUS_PENDING] * 3, False), [])
        ]

        self.chall_update = {}
        for i, aauthzr in enumerate(self.aauthzrs):
            self.chall_update[i] = [
                challb_to_achall(challb, mock.Mock(key="dummy_key"), self.doms[i])
                for challb in aauthzr.authzr.body.challenges]

    @mock.patch("certbot.auth_handler.time")
    def test_poll_challenges(self, unused_mock_time):
        self.mock_net.poll.side_effect = self._mock_poll_solve_one_valid
        self.handler._poll_challenges(self.aauthzrs, self.chall_update, False)

        for aauthzr in self.aauthzrs:
            self.assertEqual(aauthzr.authzr.body.status, messages.STATUS_VALID)

    @mock.patch("certbot.auth_handler.time")
    def test_poll_challenges_failure_best_effort(self, unused_mock_time):
        self.mock_net.poll.side_effect = self._mock_poll_solve_one_invalid
        self.handler._poll_challenges(self.aauthzrs, self.chall_update, True)

        for aauthzr in self.aauthzrs:
            self.assertEqual(aauthzr.authzr.body.status, messages.STATUS_PENDING)

    @mock.patch("certbot.auth_handler.time")
    @test_util.patch_get_utility()
    def test_poll_challenges_failure(self, unused_mock_time, unused_mock_zope):
        self.mock_net.poll.side_effect = self._mock_poll_solve_one_invalid
        self.assertRaises(
            errors.AuthorizationError, self.handler._poll_challenges,
            self.aauthzrs, self.chall_update, False)

    @mock.patch("certbot.auth_handler.time")
    def test_unable_to_find_challenge_status(self, unused_mock_time):
        from certbot.auth_handler import challb_to_achall
        self.mock_net.poll.side_effect = self._mock_poll_solve_one_valid
        self.chall_update[0].append(
            challb_to_achall(acme_util.DNS01_P, "key", self.doms[0]))
        self.assertRaises(
            errors.AuthorizationError, self.handler._poll_challenges,
            self.aauthzrs, self.chall_update, False)

    def test_verify_authzr_failure(self):
        self.assertRaises(errors.AuthorizationError,
                          self.handler.verify_authzr_complete, self.aauthzrs)

    def _mock_poll_solve_one_valid(self, authzr):
        # Pending here because my dummy script won't change the full status.
        # Basically it didn't raise an error and it stopped earlier than
        # Making all challenges invalid which would make mock_poll_solve_one
        # change authzr to invalid
        return self._mock_poll_solve_one_chall(authzr, messages.STATUS_VALID)

    def _mock_poll_solve_one_invalid(self, authzr):
        return self._mock_poll_solve_one_chall(authzr, messages.STATUS_INVALID)

    def _mock_poll_solve_one_chall(self, authzr, desired_status):
        # pylint: disable=no-self-use
        """Dummy method that solves one chall at a time to desired_status.

        When all are solved.. it changes authzr.status to desired_status

        """
        new_challbs = authzr.body.challenges
        for challb in authzr.body.challenges:
            if challb.status != desired_status:
                new_challbs = tuple(
                    challb_temp if challb_temp != challb
                    else acme_util.chall_to_challb(challb.chall, desired_status)
                    for challb_temp in authzr.body.challenges
                )
                break

        if all(test_challb.status == desired_status
               for test_challb in new_challbs):
            status_ = desired_status
        else:
            status_ = authzr.body.status

        new_authzr = messages.AuthorizationResource(
            uri=authzr.uri,
            body=messages.Authorization(
                identifier=authzr.body.identifier,
                challenges=new_challbs,
                combinations=authzr.body.combinations,
                status=status_,
            ),
        )
        return (new_authzr, "response")


class ChallbToAchallTest(unittest.TestCase):
    """Tests for certbot.auth_handler.challb_to_achall."""

    def _call(self, challb):
        from certbot.auth_handler import challb_to_achall
        return challb_to_achall(challb, "account_key", "domain")

    def test_it(self):
        self.assertEqual(
            self._call(acme_util.HTTP01_P),
            achallenges.KeyAuthorizationAnnotatedChallenge(
                challb=acme_util.HTTP01_P, account_key="account_key",
                domain="domain"),
        )


class GenChallengePathTest(unittest.TestCase):
    """Tests for certbot.auth_handler.gen_challenge_path.

    .. todo:: Add more tests for dumb_path... depending on what we want to do.

    """
    def setUp(self):
        logging.disable(logging.FATAL)

    def tearDown(self):
        logging.disable(logging.NOTSET)

    @classmethod
    def _call(cls, challbs, preferences, combinations):
        from certbot.auth_handler import gen_challenge_path
        return gen_challenge_path(challbs, preferences, combinations)

    def test_common_case(self):
        """Given TLSSNI01 and HTTP01 with appropriate combos."""
        challbs = (acme_util.TLSSNI01_P, acme_util.HTTP01_P)
        prefs = [challenges.TLSSNI01, challenges.HTTP01]
        combos = ((0,), (1,))

        # Smart then trivial dumb path test
        self.assertEqual(self._call(challbs, prefs, combos), (0,))
        self.assertTrue(self._call(challbs, prefs, None))
        # Rearrange order...
        self.assertEqual(self._call(challbs[::-1], prefs, combos), (1,))
        self.assertTrue(self._call(challbs[::-1], prefs, None))

    def test_not_supported(self):
        challbs = (acme_util.DNS01_P, acme_util.TLSSNI01_P)
        prefs = [challenges.TLSSNI01]
        combos = ((0, 1),)

        # smart path fails because no challs in perfs satisfies combos
        self.assertRaises(
            errors.AuthorizationError, self._call, challbs, prefs, combos)
        # dumb path fails because all challbs are not supported
        self.assertRaises(
            errors.AuthorizationError, self._call, challbs, prefs, None)


class ReportFailedChallsTest(unittest.TestCase):
    """Tests for certbot.auth_handler._report_failed_challs."""
    # pylint: disable=protected-access

    def setUp(self):
        kwargs = {
            "chall": acme_util.HTTP01,
            "uri": "uri",
            "status": messages.STATUS_INVALID,
            "error": messages.Error.with_code("tls", detail="detail"),
        }

        # Prevent future regressions if the error type changes
        self.assertTrue(kwargs["error"].description is not None)

        self.http01 = achallenges.KeyAuthorizationAnnotatedChallenge(
            # pylint: disable=star-args
            challb=messages.ChallengeBody(**kwargs),
            domain="example.com",
            account_key="key")

        kwargs["chall"] = acme_util.TLSSNI01
        self.tls_sni_same = achallenges.KeyAuthorizationAnnotatedChallenge(
            # pylint: disable=star-args
            challb=messages.ChallengeBody(**kwargs),
            domain="example.com",
            account_key="key")

        kwargs["error"] = messages.Error(typ="dnssec", detail="detail")
        self.tls_sni_diff = achallenges.KeyAuthorizationAnnotatedChallenge(
            # pylint: disable=star-args
            challb=messages.ChallengeBody(**kwargs),
            domain="foo.bar",
            account_key="key")

    @test_util.patch_get_utility()
    def test_same_error_and_domain(self, mock_zope):
        from certbot import auth_handler

        auth_handler._report_failed_challs([self.http01, self.tls_sni_same])
        call_list = mock_zope().add_message.call_args_list
        self.assertTrue(len(call_list) == 1)
        self.assertTrue("Domain: example.com\nType:   tls\nDetail: detail" in call_list[0][0][0])

    @test_util.patch_get_utility()
    def test_different_errors_and_domains(self, mock_zope):
        from certbot import auth_handler

        auth_handler._report_failed_challs([self.http01, self.tls_sni_diff])
        self.assertTrue(mock_zope().add_message.call_count == 2)


def gen_auth_resp(chall_list):
    """Generate a dummy authorization response."""
    return ["%s%s" % (chall.__class__.__name__, chall.domain)
            for chall in chall_list]


def gen_dom_authzr(domain, challs, combos=True):
    """Generates new authzr for domains."""
    return acme_util.gen_authzr(
        messages.STATUS_PENDING, domain, challs,
        [messages.STATUS_PENDING] * len(challs), combos)


if __name__ == "__main__":
    unittest.main()  # pragma: no cover
