# -*- coding: utf-8 -*-
from __future__ import absolute_import
import datetime
from django.conf import settings
from django.http import HttpResponse
from django.test import TestCase
from django.utils import timezone

from mock import patch
from zerver.lib.test_helpers import MockLDAP

from confirmation.models import Confirmation

from zilencer.models import Deployment

from zerver.forms import HomepageForm
from zerver.lib.actions import do_change_password
from zerver.views.invite import get_invitee_emails_set
from zerver.models import (
    get_realm, get_prereg_user_by_email, get_user_profile_by_email,
    PreregistrationUser, Realm, RealmAlias, Recipient,
    Referral, ScheduledJob, UserProfile, UserMessage,
    Stream, Subscription, ScheduledJob
)
from zerver.management.commands.deliver_email import send_email_job

from zerver.lib.actions import (
    set_default_streams,
    do_change_is_admin,
    get_stream
)

from zerver.lib.initial_password import initial_password
from zerver.lib.actions import do_deactivate_realm, do_set_realm_default_language, \
    add_new_user_history
from zerver.lib.digest import send_digest_email
from zerver.lib.notifications import (
    enqueue_welcome_emails, one_click_unsubscribe_link, send_local_email_template_with_delay)
from zerver.lib.test_helpers import find_pattern_in_email, find_key_by_email, queries_captured, \
    HostRequestMock
from zerver.lib.test_classes import (
    ZulipTestCase,
)
from zerver.lib.test_runner import slow
from zerver.lib.session_user import get_session_dict_user
from zerver.context_processors import common_context

import re
import ujson

from typing import Dict, List, Set, Optional

from six.moves import urllib
from six.moves import range
import six
from typing import Any, Text
import os

class PublicURLTest(ZulipTestCase):
    """
    Account creation URLs are accessible even when not logged in. Authenticated
    URLs redirect to a page.
    """

    def fetch(self, method, urls, expected_status):
        # type: (str, List[str], int) -> None
        for url in urls:
            # e.g. self.client_post(url) if method is "post"
            response = getattr(self, method)(url)
            self.assertEqual(response.status_code, expected_status,
                             msg="Expected %d, received %d for %s to %s" % (
                                 expected_status, response.status_code, method, url))

    def test_public_urls(self):
        # type: () -> None
        """
        Test which views are accessible when not logged in.
        """
        # FIXME: We should also test the Tornado URLs -- this codepath
        # can't do so because this Django test mechanism doesn't go
        # through Tornado.
        denmark_stream_id = Stream.objects.get(name='Denmark').id
        get_urls = {200: ["/accounts/home/", "/accounts/login/"
                          "/en/accounts/home/", "/ru/accounts/home/",
                          "/en/accounts/login/", "/ru/accounts/login/",
                          "/help/"],
                    302: ["/", "/en/", "/ru/"],
                    401: ["/json/streams/%d/members" % (denmark_stream_id,),
                          "/api/v1/users/me/subscriptions",
                          "/api/v1/messages",
                          "/json/messages",
                          "/api/v1/streams",
                          ],
                    404: ["/help/nonexistent"],
                    }

        # Add all files in 'templates/zerver/help' directory (except for 'main.html' and
        # 'index.md') to `get_urls['200']` list.
        for doc in os.listdir('./templates/zerver/help'):
            if doc.startswith(".") or '~' in doc or '#' in doc:
                continue  # nocoverage -- just here for convenience
            if doc not in {'main.html', 'index.md', 'include'}:
                get_urls[200].append('/help/' + os.path.splitext(doc)[0]) # Strip the extension.

        post_urls = {200: ["/accounts/login/"],
                     302: ["/accounts/logout/"],
                     401: ["/json/messages",
                           "/json/invite_users",
                           "/json/settings/change",
                           "/json/subscriptions/exists",
                           "/json/subscriptions/property",
                           "/json/fetch_api_key",
                           "/json/users/me/pointer",
                           "/json/users/me/subscriptions",
                           "/api/v1/users/me/subscriptions",
                           ],
                     400: ["/api/v1/external/github",
                           "/api/v1/fetch_api_key",
                           ],
                     }
        put_urls = {401: ["/json/users/me/pointer"],
                    }
        for status_code, url_set in six.iteritems(get_urls):
            self.fetch("client_get", url_set, status_code)
        for status_code, url_set in six.iteritems(post_urls):
            self.fetch("client_post", url_set, status_code)
        for status_code, url_set in six.iteritems(put_urls):
            self.fetch("client_put", url_set, status_code)

    def test_get_gcid_when_not_configured(self):
        # type: () -> None
        with self.settings(GOOGLE_CLIENT_ID=None):
            resp = self.client_get("/api/v1/fetch_google_client_id")
            self.assertEqual(400, resp.status_code,
                             msg="Expected 400, received %d for GET /api/v1/fetch_google_client_id" % (
                                 resp.status_code,))
            data = ujson.loads(resp.content)
            self.assertEqual('error', data['result'])

    def test_get_gcid_when_configured(self):
        # type: () -> None
        with self.settings(GOOGLE_CLIENT_ID="ABCD"):
            resp = self.client_get("/api/v1/fetch_google_client_id")
            self.assertEqual(200, resp.status_code,
                             msg="Expected 200, received %d for GET /api/v1/fetch_google_client_id" % (
                                 resp.status_code,))
            data = ujson.loads(resp.content)
            self.assertEqual('success', data['result'])
            self.assertEqual('ABCD', data['google_client_id'])

class AddNewUserHistoryTest(ZulipTestCase):
    def test_add_new_user_history_race(self):
        # type: () -> None
        """Sends a message during user creation"""
        # Create a user who hasn't had historical messages added
        stream_dict = {
            "Denmark": {"description": "A Scandinavian country", "invite_only": False},
            "Verona": {"description": "A city in Italy", "invite_only": False}
        }  # type: Dict[Text, Dict[Text, Any]]
        set_default_streams(get_realm("zulip"), stream_dict)
        with patch("zerver.lib.actions.add_new_user_history"):
            self.register("test@zulip.com", "test")
        user_profile = get_user_profile_by_email("test@zulip.com")

        subs = Subscription.objects.select_related("recipient").filter(
            user_profile=user_profile, recipient__type=Recipient.STREAM)
        streams = Stream.objects.filter(id__in=[sub.recipient.type_id for sub in subs])
        self.send_message("hamlet@zulip.com", streams[0].name, Recipient.STREAM, "test")
        add_new_user_history(user_profile, streams)

class PasswordResetTest(ZulipTestCase):
    """
    Log in, reset password, log out, log in with new password.
    """

    def test_password_reset(self):
        # type: () -> None
        email = 'hamlet@zulip.com'
        old_password = initial_password(email)

        self.login(email)

        # test password reset template
        result = self.client_get('/accounts/password/reset/')
        self.assert_in_response('Reset your password.', result)

        # start the password reset process by supplying an email address
        result = self.client_post('/accounts/password/reset/', {'email': email})

        # check the redirect link telling you to check mail for password reset link
        self.assertEqual(result.status_code, 302)
        self.assertTrue(result["Location"].endswith(
            "/accounts/password/reset/done/"))
        result = self.client_get(result["Location"])

        self.assert_in_response("Check your email to finish the process.", result)

        # Visit the password reset link.
        password_reset_url = self.get_confirmation_url_from_outbox(email, "(\S+)")
        result = self.client_get(password_reset_url)
        self.assertEqual(result.status_code, 200)

        # Reset your password
        result = self.client_post(password_reset_url,
                                  {'new_password1': 'new_password',
                                   'new_password2': 'new_password'})

        # password reset succeeded
        self.assertEqual(result.status_code, 302)
        self.assertTrue(result["Location"].endswith("/password/done/"))

        # log back in with new password
        self.login(email, password='new_password')
        user_profile = get_user_profile_by_email('hamlet@zulip.com')
        self.assertEqual(get_session_dict_user(self.client.session), user_profile.id)

        # make sure old password no longer works
        self.login(email, password=old_password, fails=True)

    def test_redirect_endpoints(self):
        # type: () -> None
        '''
        These tests are mostly designed to give us 100% URL coverage
        in our URL coverage reports.  Our mechanism for finding URL
        coverage doesn't handle redirects, so we just have a few quick
        tests here.
        '''
        result = self.client_get('/accounts/password/reset/done/')
        self.assert_in_success_response(["Check your email"], result)

        result = self.client_get('/accounts/password/done/')
        self.assert_in_success_response(["We've reset your password!"], result)

        result = self.client_get('/accounts/send_confirm/alice@example.com')
        self.assert_in_success_response(["Still no email?"], result)

class LoginTest(ZulipTestCase):
    """
    Logging in, registration, and logging out.
    """

    def test_login(self):
        # type: () -> None
        self.login("hamlet@zulip.com")
        user_profile = get_user_profile_by_email('hamlet@zulip.com')
        self.assertEqual(get_session_dict_user(self.client.session), user_profile.id)

    def test_login_bad_password(self):
        # type: () -> None
        self.login("hamlet@zulip.com", password="wrongpassword", fails=True)
        self.assertIsNone(get_session_dict_user(self.client.session))

    def test_login_nonexist_user(self):
        # type: () -> None
        result = self.login_with_return("xxx@zulip.com", "xxx")
        self.assert_in_response("Please enter a correct email and password", result)

    def test_register(self):
        # type: () -> None
        realm = get_realm("zulip")
        stream_dict = {"stream_"+str(i): {"description": "stream_%s_description" % i, "invite_only": False}
                       for i in range(40)}  # type: Dict[Text, Dict[Text, Any]]
        for stream_name in stream_dict.keys():
            self.make_stream(stream_name, realm=realm)

        set_default_streams(realm, stream_dict)
        with queries_captured() as queries:
            self.register("test@zulip.com", "test")
        # Ensure the number of queries we make is not O(streams)
        self.assert_max_length(queries, 69)
        user_profile = get_user_profile_by_email('test@zulip.com')
        self.assertEqual(get_session_dict_user(self.client.session), user_profile.id)
        self.assertFalse(user_profile.enable_stream_desktop_notifications)

    def test_register_deactivated(self):
        # type: () -> None
        """
        If you try to register for a deactivated realm, you get a clear error
        page.
        """
        realm = get_realm("zulip")
        realm.deactivated = True
        realm.save(update_fields=["deactivated"])

        result = self.register("test@zulip.com", "test")
        self.assert_in_response("has been deactivated", result)

        with self.assertRaises(UserProfile.DoesNotExist):
            get_user_profile_by_email('test@zulip.com')

    def test_login_deactivated(self):
        # type: () -> None
        """
        If you try to log in to a deactivated realm, you get a clear error page.
        """
        realm = get_realm("zulip")
        realm.deactivated = True
        realm.save(update_fields=["deactivated"])

        result = self.login_with_return("hamlet@zulip.com")
        self.assert_in_response("has been deactivated", result)

    def test_logout(self):
        # type: () -> None
        self.login("hamlet@zulip.com")
        self.client_post('/accounts/logout/')
        self.assertIsNone(get_session_dict_user(self.client.session))

    def test_non_ascii_login(self):
        # type: () -> None
        """
        You can log in even if your password contain non-ASCII characters.
        """
        email = "test@zulip.com"
        password = u"hümbüǵ"

        # Registering succeeds.
        self.register("test@zulip.com", password)
        user_profile = get_user_profile_by_email(email)
        self.assertEqual(get_session_dict_user(self.client.session), user_profile.id)
        self.client_post('/accounts/logout/')
        self.assertIsNone(get_session_dict_user(self.client.session))

        # Logging in succeeds.
        self.client_post('/accounts/logout/')
        self.login(email, password)
        self.assertEqual(get_session_dict_user(self.client.session), user_profile.id)

    def test_login_page_redirects_logged_in_user(self):
        # type: () -> None
        """You will be redirected to the app's main page if you land on the
        login page when already logged in.
        """
        self.login("cordelia@zulip.com")
        response = self.client_get("/login/")
        self.assertEqual(response["Location"], "/")

class InviteUserTest(ZulipTestCase):

    def invite(self, users, streams, body=''):
        # type: (str, List[Text], str) -> HttpResponse
        """
        Invites the specified users to Zulip with the specified streams.

        users should be a string containing the users to invite, comma or
            newline separated.

        streams should be a list of strings.
        """

        return self.client_post("/json/invite_users",
                                {"invitee_emails": users,
                                 "stream": streams,
                                 "custom_body": body})

    def check_sent_emails(self, correct_recipients, custom_body=None):
        # type: (List[str], Optional[str]) -> None
        from django.core.mail import outbox
        self.assertEqual(len(outbox), len(correct_recipients))
        email_recipients = [email.recipients()[0] for email in outbox]
        self.assertEqual(sorted(email_recipients), sorted(correct_recipients))
        if len(outbox) == 0:
            return

        if custom_body is None:
            self.assertNotIn("Message from", outbox[0].body)
        else:
            self.assertIn("Message from ", outbox[0].body)
            self.assertIn(custom_body, outbox[0].body)

    def test_bulk_invite_users(self):
        # type: () -> None
        """The bulk_invite_users code path is for the first user in a realm."""
        self.login('hamlet@zulip.com')
        invitees = ['alice@zulip.com', 'bob@zulip.com']
        params = {
            'invitee_emails': ujson.dumps(invitees),
        }
        result = self.client_post('/json/bulk_invite_users', params)
        self.assert_json_success(result)
        self.check_sent_emails(invitees)

    def test_bulk_invite_users_invalid_emails(self):
        # type: () -> None
        self.login('hamlet@zulip.com')
        invitees = ['alice@zulip.com', 'bobnoatzulip.com']
        params = {
            'invitee_emails': ujson.dumps(invitees),
        }
        self.assert_json_error(
            self.client_post('/json/bulk_invite_users', params),
            'Some emails did not validate, so we didn\'t send any invitations.')
        self.check_sent_emails([])

    def test_successful_invite_user(self):
        # type: () -> None
        """
        A call to /json/invite_users with valid parameters causes an invitation
        email to be sent.
        """
        self.login("hamlet@zulip.com")
        invitee = "alice-test@zulip.com"
        self.assert_json_success(self.invite(invitee, ["Denmark"]))
        self.assertTrue(find_key_by_email(invitee))
        self.check_sent_emails([invitee])

    def test_successful_invite_user_with_custom_body(self):
        # type: () -> None
        """
        A call to /json/invite_users with valid parameters causes an invitation
        email to be sent.
        """
        self.login("hamlet@zulip.com")
        invitee = "alice-test@zulip.com"
        body = "Custom Text."
        self.assert_json_success(self.invite(invitee, ["Denmark"], body))
        self.assertTrue(find_pattern_in_email(invitee, body))
        self.check_sent_emails([invitee], custom_body=body)

    def test_successful_invite_user_with_name(self):
        # type: () -> None
        """
        A call to /json/invite_users with valid parameters causes an invitation
        email to be sent.
        """
        self.login("hamlet@zulip.com")
        email = "alice-test@zulip.com"
        invitee = "Alice Test <{}>".format(email)
        self.assert_json_success(self.invite(invitee, ["Denmark"]))
        self.assertTrue(find_key_by_email(email))
        self.check_sent_emails([email])

    def test_successful_invite_user_with_name_and_normal_one(self):
        # type: () -> None
        """
        A call to /json/invite_users with valid parameters causes an invitation
        email to be sent.
        """
        self.login("hamlet@zulip.com")
        email = "alice-test@zulip.com"
        email2 = "bob-test@zulip.com"
        invitee = "Alice Test <{}>, {}".format(email, email2)
        self.assert_json_success(self.invite(invitee, ["Denmark"]))
        self.assertTrue(find_key_by_email(email))
        self.assertTrue(find_key_by_email(email2))
        self.check_sent_emails([email, email2])

    def test_successful_invite_user_with_notifications_stream(self):
        # type: () -> None
        """
        A call to /json/invite_users with valid parameters unconditionally
        subscribes the invitee to the notifications stream if it exists and is
        public.
        """
        realm = get_realm('zulip')
        notifications_stream = get_stream('Verona', realm)
        realm.notifications_stream = notifications_stream
        realm.save()

        self.login('hamlet@zulip.com')
        invitee = 'alice-test@zulip.com'
        self.assert_json_success(self.invite(invitee, ['Denmark']))
        self.assertTrue(find_key_by_email(invitee))
        self.check_sent_emails([invitee])

        prereg_user = get_prereg_user_by_email(invitee)
        streams = list(prereg_user.streams.all())
        self.assertTrue(notifications_stream in streams)

    def test_invite_user_signup_initial_history(self):
        # type: () -> None
        """
        Test that a new user invited to a stream receives some initial
        history but only from public streams.
        """
        self.login("hamlet@zulip.com")
        user_profile = get_user_profile_by_email("hamlet@zulip.com")
        private_stream_name = "Secret"
        self.make_stream(private_stream_name, invite_only=True)
        self.subscribe_to_stream(user_profile.email, private_stream_name)
        public_msg_id = self.send_message("hamlet@zulip.com", "Denmark", Recipient.STREAM,
                                          "Public topic", "Public message")
        secret_msg_id = self.send_message("hamlet@zulip.com", private_stream_name, Recipient.STREAM,
                                          "Secret topic", "Secret message")
        invitee = "alice-test@zulip.com"
        self.assert_json_success(self.invite(invitee, [private_stream_name, "Denmark"]))
        self.assertTrue(find_key_by_email(invitee))

        self.submit_reg_form_for_user("alice-test@zulip.com", "password")
        invitee_profile = get_user_profile_by_email(invitee)
        invitee_msg_ids = [um.message_id for um in
                           UserMessage.objects.filter(user_profile=invitee_profile)]
        self.assertTrue(public_msg_id in invitee_msg_ids)
        self.assertFalse(secret_msg_id in invitee_msg_ids)

    def test_multi_user_invite(self):
        # type: () -> None
        """
        Invites multiple users with a variety of delimiters.
        """
        self.login("hamlet@zulip.com")
        # Intentionally use a weird string.
        self.assert_json_success(self.invite(
            """bob-test@zulip.com,     carol-test@zulip.com,
            dave-test@zulip.com


earl-test@zulip.com""", ["Denmark"]))
        for user in ("bob", "carol", "dave", "earl"):
            self.assertTrue(find_key_by_email("%s-test@zulip.com" % (user,)))
        self.check_sent_emails(["bob-test@zulip.com", "carol-test@zulip.com",
                                "dave-test@zulip.com", "earl-test@zulip.com"])

    def test_missing_or_invalid_params(self):
        # type: () -> None
        """
        Tests inviting with various missing or invalid parameters.
        """
        self.login("hamlet@zulip.com")
        self.assert_json_error(
            self.client_post("/json/invite_users", {"invitee_emails": "foo@zulip.com",
                                                    "custom_body": ''}),
            "You must specify at least one stream for invitees to join.")

        for address in ("noatsign.com", "outsideyourdomain@example.net"):
            self.assert_json_error(
                self.invite(address, ["Denmark"]),
                "Some emails did not validate, so we didn't send any invitations.")
        self.check_sent_emails([])

        self.assert_json_error(
            self.invite("", ["Denmark"]),
            "You must specify at least one email address.")
        self.check_sent_emails([])

    def test_invalid_stream(self):
        # type: () -> None
        """
        Tests inviting to a non-existent stream.
        """
        self.login("hamlet@zulip.com")
        self.assert_json_error(self.invite("iago-test@zulip.com", ["NotARealStream"]),
                               "Stream does not exist: NotARealStream. No invites were sent.")
        self.check_sent_emails([])

    def test_invite_existing_user(self):
        # type: () -> None
        """
        If you invite an address already using Zulip, no invitation is sent.
        """
        self.login("hamlet@zulip.com")
        self.assert_json_error(
            self.client_post("/json/invite_users",
                             {"invitee_emails": "hamlet@zulip.com",
                              "stream": ["Denmark"],
                              "custom_body": ''}),
            "We weren't able to invite anyone.")
        self.assertRaises(PreregistrationUser.DoesNotExist,
                          lambda: PreregistrationUser.objects.get(
                              email="hamlet@zulip.com"))
        self.check_sent_emails([])

    def test_invite_some_existing_some_new(self):
        # type: () -> None
        """
        If you invite a mix of already existing and new users, invitations are
        only sent to the new users.
        """
        self.login("hamlet@zulip.com")
        existing = ["hamlet@zulip.com", "othello@zulip.com"]
        new = ["foo-test@zulip.com", "bar-test@zulip.com"]

        result = self.client_post("/json/invite_users",
                                  {"invitee_emails": "\n".join(existing + new),
                                   "stream": ["Denmark"],
                                   "custom_body": ''})
        self.assert_json_error(result,
                               "Some of those addresses are already using Zulip, \
so we didn't send them an invitation. We did send invitations to everyone else!")

        # We only created accounts for the new users.
        for email in existing:
            self.assertRaises(PreregistrationUser.DoesNotExist,
                              lambda: PreregistrationUser.objects.get(
                                  email=email))
        for email in new:
            self.assertTrue(PreregistrationUser.objects.get(email=email))

        # We only sent emails to the new users.
        self.check_sent_emails(new)

        prereg_user = get_prereg_user_by_email('foo-test@zulip.com')
        self.assertEqual(prereg_user.email, 'foo-test@zulip.com')

    def test_invite_outside_domain_in_closed_realm(self):
        # type: () -> None
        """
        In a realm with `restricted_to_domain = True`, you can't invite people
        with a different domain from that of the realm or your e-mail address.
        """
        zulip_realm = get_realm("zulip")
        zulip_realm.restricted_to_domain = True
        zulip_realm.save()

        self.login("hamlet@zulip.com")
        external_address = "foo@example.com"

        self.assert_json_error(
            self.invite(external_address, ["Denmark"]),
            "Some emails did not validate, so we didn't send any invitations.")

    def test_invite_outside_domain_in_open_realm(self):
        # type: () -> None
        """
        In a realm with `restricted_to_domain = False`, you can invite people
        with a different domain from that of the realm or your e-mail address.
        """
        zulip_realm = get_realm("zulip")
        zulip_realm.restricted_to_domain = False
        zulip_realm.save()

        self.login("hamlet@zulip.com")
        external_address = "foo@example.com"

        self.assert_json_success(self.invite(external_address, ["Denmark"]))
        self.check_sent_emails([external_address])

    def test_invite_with_non_ascii_streams(self):
        # type: () -> None
        """
        Inviting someone to streams with non-ASCII characters succeeds.
        """
        self.login("hamlet@zulip.com")
        invitee = "alice-test@zulip.com"

        stream_name = u"hümbüǵ"

        # Make sure we're subscribed before inviting someone.
        self.subscribe_to_stream("hamlet@zulip.com", stream_name)

        self.assert_json_success(self.invite(invitee, [stream_name]))

    def test_refer_friend(self):
        # type: () -> None
        self.login("hamlet@zulip.com")
        user = get_user_profile_by_email('hamlet@zulip.com')
        user.invites_granted = 1
        user.invites_used = 0
        user.save()

        invitee = "alice-test@zulip.com"
        result = self.client_post('/json/refer_friend', dict(email=invitee))
        self.assert_json_success(result)

        # verify this works
        Referral.objects.get(user_profile=user, email=invitee)

        user = get_user_profile_by_email('hamlet@zulip.com')
        self.assertEqual(user.invites_used, 1)

    def test_refer_friend_no_email(self):
        # type: () -> None
        self.login("hamlet@zulip.com")
        user = get_user_profile_by_email('hamlet@zulip.com')
        user.invites_granted = 1
        user.invites_used = 0
        user.save()

        self.assert_json_error(
            self.client_post('/json/refer_friend', dict(email='')),
            "No email address specified")

        user = get_user_profile_by_email('hamlet@zulip.com')
        self.assertEqual(user.invites_used, 0)

    def test_refer_friend_no_invites(self):
        # type: () -> None
        self.login("hamlet@zulip.com")
        user = get_user_profile_by_email('hamlet@zulip.com')
        user.invites_granted = 1
        user.invites_used = 1
        user.save()

        invitee = "alice-test@zulip.com"
        self.assert_json_error(
            self.client_post('/json/refer_friend', dict(email=invitee)),
            "Insufficient invites")

        user = get_user_profile_by_email('hamlet@zulip.com')
        self.assertEqual(user.invites_used, 1)

    def test_invitation_reminder_email(self):
        # type: () -> None
        from django.core.mail import outbox
        current_user_email = "hamlet@zulip.com"
        self.login(current_user_email)
        invitee = "alice-test@zulip.com"
        self.assert_json_success(self.invite(invitee, ["Denmark"]))
        self.assertTrue(find_key_by_email(invitee))
        self.check_sent_emails([invitee])

        data = {"email": invitee, "referrer_email": current_user_email}
        invitee = get_prereg_user_by_email(data["email"])
        referrer = get_user_profile_by_email(data["referrer_email"])
        link = Confirmation.objects.get_link_for_object(invitee, host=referrer.realm.host)
        context = common_context(referrer)
        context.update({
            'activate_url': link,
            'referrer': referrer,
            'verbose_support_offers': settings.VERBOSE_SUPPORT_OFFERS,
            'support_email': settings.ZULIP_ADMINISTRATOR
        })
        with self.settings(EMAIL_BACKEND='django.core.mail.backends.console.EmailBackend'):
            send_local_email_template_with_delay(
                [{'email': data["email"], 'name': ""}],
                "zerver/emails/invitation/invitation_reminder_email",
                context,
                datetime.timedelta(days=0),
                tags=["invitation-reminders"],
                sender={'email': settings.ZULIP_ADMINISTRATOR, 'name': 'Zulip'})
        email_jobs_to_deliver = ScheduledJob.objects.filter(
            type=ScheduledJob.EMAIL,
            scheduled_timestamp__lte=timezone.now())
        self.assertEqual(len(email_jobs_to_deliver), 1)
        email_count = len(outbox)
        for job in email_jobs_to_deliver:
            self.assertTrue(send_email_job(job))
        self.assertEqual(len(outbox), email_count + 1)

class InviteeEmailsParserTests(TestCase):
    def setUp(self):
        # type: () -> None
        self.email1 = "email1@zulip.com"
        self.email2 = "email2@zulip.com"
        self.email3 = "email3@zulip.com"

    def test_if_emails_separated_by_commas_are_parsed_and_striped_correctly(self):
        # type: () -> None
        emails_raw = "{} ,{}, {}".format(self.email1, self.email2, self.email3)
        expected_set = {self.email1, self.email2, self.email3}
        self.assertEqual(get_invitee_emails_set(emails_raw), expected_set)

    def test_if_emails_separated_by_newlines_are_parsed_and_striped_correctly(self):
        # type: () -> None
        emails_raw = "{}\n {}\n {} ".format(self.email1, self.email2, self.email3)
        expected_set = {self.email1, self.email2, self.email3}
        self.assertEqual(get_invitee_emails_set(emails_raw), expected_set)

    def test_if_emails_from_email_client_separated_by_newlines_are_parsed_correctly(self):
        # type: () -> None
        emails_raw = "Email One <{}>\nEmailTwo<{}>\nEmail Three<{}>".format(self.email1, self.email2, self.email3)
        expected_set = {self.email1, self.email2, self.email3}
        self.assertEqual(get_invitee_emails_set(emails_raw), expected_set)

    def test_if_emails_in_mixed_style_are_parsed_correctly(self):
        # type: () -> None
        emails_raw = "Email One <{}>,EmailTwo<{}>\n{}".format(self.email1, self.email2, self.email3)
        expected_set = {self.email1, self.email2, self.email3}
        self.assertEqual(get_invitee_emails_set(emails_raw), expected_set)


class EmailUnsubscribeTests(ZulipTestCase):
    def test_error_unsubscribe(self):
        # type: () -> None

        # An invalid insubscribe token "test123" produces an error.
        result = self.client_get('/accounts/unsubscribe/missed_messages/test123')
        self.assert_in_response('Unknown email unsubscribe request', result)

        # An unknown message type "fake" produces an error.
        user_profile = get_user_profile_by_email("hamlet@zulip.com")
        unsubscribe_link = one_click_unsubscribe_link(user_profile, "fake")
        result = self.client_get(urllib.parse.urlparse(unsubscribe_link).path)
        self.assert_in_response('Unknown email unsubscribe request', result)

    def test_missedmessage_unsubscribe(self):
        # type: () -> None
        """
        We provide one-click unsubscribe links in missed message
        e-mails that you can click even when logged out to update your
        email notification settings.
        """
        user_profile = get_user_profile_by_email("hamlet@zulip.com")
        user_profile.enable_offline_email_notifications = True
        user_profile.save()

        unsubscribe_link = one_click_unsubscribe_link(user_profile,
                                                      "missed_messages")
        result = self.client_get(urllib.parse.urlparse(unsubscribe_link).path)

        self.assertEqual(result.status_code, 200)
        # Circumvent user_profile caching.
        user_profile = UserProfile.objects.get(email="hamlet@zulip.com")
        self.assertFalse(user_profile.enable_offline_email_notifications)

    def test_welcome_unsubscribe(self):
        # type: () -> None
        """
        We provide one-click unsubscribe links in welcome e-mails that you can
        click even when logged out to stop receiving them.
        """
        email = "hamlet@zulip.com"
        user_profile = get_user_profile_by_email("hamlet@zulip.com")

        # Simulate a new user signing up, which enqueues 2 welcome e-mails.
        enqueue_welcome_emails(email, "King Hamlet")
        self.assertEqual(2, len(ScheduledJob.objects.filter(
            type=ScheduledJob.EMAIL, filter_string__iexact=email)))

        # Simulate unsubscribing from the welcome e-mails.
        unsubscribe_link = one_click_unsubscribe_link(user_profile, "welcome")
        result = self.client_get(urllib.parse.urlparse(unsubscribe_link).path)

        # The welcome email jobs are no longer scheduled.
        self.assertEqual(result.status_code, 200)
        self.assertEqual(0, len(ScheduledJob.objects.filter(
            type=ScheduledJob.EMAIL, filter_string__iexact=email)))

    def test_digest_unsubscribe(self):
        # type: () -> None
        """
        We provide one-click unsubscribe links in digest e-mails that you can
        click even when logged out to stop receiving them.

        Unsubscribing from these emails also dequeues any digest email jobs that
        have been queued.
        """
        email = "hamlet@zulip.com"
        user_profile = get_user_profile_by_email("hamlet@zulip.com")
        self.assertTrue(user_profile.enable_digest_emails)

        # Enqueue a fake digest email.
        send_digest_email(user_profile, "", "", "")
        self.assertEqual(1, len(ScheduledJob.objects.filter(
            type=ScheduledJob.EMAIL, filter_string__iexact=email)))

        # Simulate unsubscribing from digest e-mails.
        unsubscribe_link = one_click_unsubscribe_link(user_profile, "digest")
        result = self.client_get(urllib.parse.urlparse(unsubscribe_link).path)

        # The setting is toggled off, and scheduled jobs have been removed.
        self.assertEqual(result.status_code, 200)
        # Circumvent user_profile caching.
        user_profile = UserProfile.objects.get(email="hamlet@zulip.com")
        self.assertFalse(user_profile.enable_digest_emails)
        self.assertEqual(0, len(ScheduledJob.objects.filter(
            type=ScheduledJob.EMAIL, filter_string__iexact=email)))

class RealmCreationTest(ZulipTestCase):

    def test_create_realm(self):
        # type: () -> None
        password = "test"
        string_id = "zuliptest"
        email = "user1@test.com"
        realm = get_realm('test')

        # Make sure the realm does not exist
        self.assertIsNone(realm)

        with self.settings(OPEN_REALM_CREATION=True):
            # Create new realm with the email
            result = self.client_post('/create_realm/', {'email': email})
            self.assertEqual(result.status_code, 302)
            self.assertTrue(result["Location"].endswith(
                "/accounts/send_confirm/%s" % (email,)))
            result = self.client_get(result["Location"])
            self.assert_in_response("Check your email so we can get started.", result)

            # Visit the confirmation link.
            confirmation_url = self.get_confirmation_url_from_outbox(email)
            result = self.client_get(confirmation_url)
            self.assertEqual(result.status_code, 200)

            result = self.submit_reg_form_for_user(email, password, realm_subdomain=string_id)
            self.assertEqual(result.status_code, 302)

            # Make sure the realm is created
            realm = get_realm(string_id)
            self.assertIsNotNone(realm)
            self.assertEqual(realm.string_id, string_id)
            self.assertEqual(get_user_profile_by_email(email).realm, realm)

            # Check defaults
            self.assertEqual(realm.org_type, Realm.COMMUNITY)
            self.assertEqual(realm.restricted_to_domain, False)
            self.assertEqual(realm.invite_required, True)

            self.assertTrue(result["Location"].endswith("/"))

    def test_create_realm_with_subdomain(self):
        # type: () -> None
        password = "test"
        string_id = "zuliptest"
        email = "user1@test.com"
        realm_name = "Test"

        # Make sure the realm does not exist
        self.assertIsNone(get_realm('test'))

        with self.settings(REALMS_HAVE_SUBDOMAINS=True), self.settings(OPEN_REALM_CREATION=True):
            # Create new realm with the email
            result = self.client_post('/create_realm/', {'email': email})
            self.assertEqual(result.status_code, 302)
            self.assertTrue(result["Location"].endswith(
                "/accounts/send_confirm/%s" % (email,)))
            result = self.client_get(result["Location"])
            self.assert_in_response("Check your email so we can get started.", result)

            # Visit the confirmation link.
            confirmation_url = self.get_confirmation_url_from_outbox(email)
            result = self.client_get(confirmation_url)
            self.assertEqual(result.status_code, 200)

            result = self.submit_reg_form_for_user(email, password,
                                                   realm_subdomain = string_id,
                                                   realm_name=realm_name,
                                                   # Pass HTTP_HOST for the target subdomain
                                                   HTTP_HOST=string_id + ".testserver")
            self.assertEqual(result.status_code, 302)

            # Make sure the realm is created
            realm = get_realm(string_id)
            self.assertIsNotNone(realm)
            self.assertEqual(realm.string_id, string_id)
            self.assertEqual(get_user_profile_by_email(email).realm, realm)

            self.assertEqual(realm.name, realm_name)
            self.assertEqual(realm.subdomain, string_id)

    def test_mailinator_signup(self):
        # type: () -> None
        with self.settings(OPEN_REALM_CREATION=True):
            result = self.client_post('/create_realm/', {'email': "hi@mailinator.com"})
            self.assert_in_response('Please use your real email address.', result)

    def test_subdomain_restrictions(self):
        # type: () -> None
        password = "test"
        email = "user1@test.com"
        realm_name = "Test"

        with self.settings(REALMS_HAVE_SUBDOMAINS=False), self.settings(OPEN_REALM_CREATION=True):
            result = self.client_post('/create_realm/', {'email': email})
            self.client_get(result["Location"])
            confirmation_url = self.get_confirmation_url_from_outbox(email)
            self.client_get(confirmation_url)

            errors = {'id': "at least 3 characters",
                      '-id': "cannot start or end with a",
                      'string-ID': "lowercase letters",
                      'string_id': "lowercase letters",
                      'stream': "unavailable",
                      'streams': "unavailable",
                      'about': "unavailable",
                      'abouts': "unavailable",
                      'zephyr': "unavailable"}
            for string_id, error_msg in errors.items():
                result = self.submit_reg_form_for_user(email, password,
                                                       realm_subdomain = string_id,
                                                       realm_name = realm_name)
                self.assert_in_response(error_msg, result)

            # test valid subdomain
            result = self.submit_reg_form_for_user(email, password,
                                                   realm_subdomain = 'a-0',
                                                   realm_name = realm_name)
            self.assertEqual(result.status_code, 302)

class UserSignUpTest(ZulipTestCase):

    def test_user_default_language(self):
        # type: () -> None
        """
        Check if the default language of new user is the default language
        of the realm.
        """
        email = "newguy@zulip.com"
        password = "newpassword"
        realm = get_realm('zulip')
        do_set_realm_default_language(realm, "de")

        result = self.client_post('/accounts/home/', {'email': email})
        self.assertEqual(result.status_code, 302)
        self.assertTrue(result["Location"].endswith(
            "/accounts/send_confirm/%s" % (email,)))
        result = self.client_get(result["Location"])
        self.assert_in_response("Check your email so we can get started.", result)

        # Visit the confirmation link.
        confirmation_url = self.get_confirmation_url_from_outbox(email)
        result = self.client_get(confirmation_url)
        self.assertEqual(result.status_code, 200)

        # Pick a password and agree to the ToS.
        result = self.submit_reg_form_for_user(email, password)
        self.assertEqual(result.status_code, 302)

        user_profile = get_user_profile_by_email(email)
        self.assertEqual(user_profile.default_language, realm.default_language)
        from django.core.mail import outbox
        outbox.pop()

    def test_signup_invalid_name(self):
        # type: () -> None
        """
        Check if the default language of new user is the default language
        of the realm.
        """
        email = "newguy@zulip.com"
        password = "newpassword"

        result = self.client_post('/accounts/home/', {'email': email})
        self.assertEqual(result.status_code, 302)
        self.assertTrue(result["Location"].endswith(
            "/accounts/send_confirm/%s" % (email,)))
        result = self.client_get(result["Location"])
        self.assert_in_response("Check your email so we can get started.", result)

        # Visit the confirmation link.
        confirmation_url = self.get_confirmation_url_from_outbox(email)
        result = self.client_get(confirmation_url)
        self.assertEqual(result.status_code, 200)

        # Pick a password and agree to the ToS.
        result = self.submit_reg_form_for_user(email, password, full_name="<invalid>")
        self.assert_in_success_response("Invalid characters in name!", result)

    def test_unique_completely_open_domain(self):
        # type: () -> None
        password = "test"
        email = "user1@acme.com"
        subdomain = "zulip"
        realm_name = "Zulip"

        realm = get_realm('zulip')
        realm.restricted_to_domain = False
        realm.invite_required = False
        realm.save()

        for string_id in ('simple', 'zephyr'):
            realm = get_realm(string_id)
            do_deactivate_realm(realm)
            realm.save()

        result = self.client_post('/register/', {'email': email})

        self.assertEqual(result.status_code, 302)
        self.assertTrue(result["Location"].endswith(
            "/accounts/send_confirm/%s" % (email,)))
        result = self.client_get(result["Location"])
        self.assert_in_response("Check your email so we can get started.", result)
        # Visit the confirmation link.
        from django.core.mail import outbox
        for message in reversed(outbox):
            if email in message.to:
                confirmation_link_pattern = re.compile(settings.EXTERNAL_HOST + "(\S+)>")
                confirmation_url = confirmation_link_pattern.search(
                    message.body).groups()[0]
                break
        else:
            raise AssertionError("Couldn't find a confirmation email.")

        result = self.client_get(confirmation_url)
        self.assertEqual(result.status_code, 200)

        result = self.submit_reg_form_for_user(email,
                                               password,
                                               realm_name=realm_name,
                                               realm_subdomain=subdomain,
                                               # Pass HTTP_HOST for the target subdomain
                                               HTTP_HOST=subdomain + ".testserver")
        self.assert_in_success_response(["You're almost there."], result)

    def test_completely_open_domain_success(self):
        # type: () -> None
        password = "test"
        email = "user1@acme.com"
        subdomain = "zulip"
        realm_name = "Zulip"

        realm = get_realm('zulip')
        realm.restricted_to_domain = False
        realm.invite_required = False
        realm.save()

        result = self.client_post('/register/zulip/', {'email': email})

        self.assertEqual(result.status_code, 302)
        self.assertTrue(result["Location"].endswith(
            "/accounts/send_confirm/%s" % (email,)))
        result = self.client_get(result["Location"])
        self.assert_in_response("Check your email so we can get started.", result)
        # Visit the confirmation link.
        from django.core.mail import outbox
        for message in reversed(outbox):
            if email in message.to:
                confirmation_link_pattern = re.compile(settings.EXTERNAL_HOST + "(\S+)>")
                confirmation_url = confirmation_link_pattern.search(
                    message.body).groups()[0]
                break
        else:
            raise AssertionError("Couldn't find a confirmation email.")

        result = self.client_get(confirmation_url)
        self.assertEqual(result.status_code, 200)

        result = self.submit_reg_form_for_user(email,
                                               password,
                                               realm_name=realm_name,
                                               realm_subdomain=subdomain,
                                               # Pass HTTP_HOST for the target subdomain
                                               HTTP_HOST=subdomain + ".testserver")
        self.assert_in_success_response(["You're almost there."], result)

    def test_failed_signup_due_to_restricted_domain(self):
        # type: () -> None
        realm = get_realm('zulip')
        realm.invite_required = False
        realm.save()
        with self.settings(REALMS_HAVE_SUBDOMAINS = True):
            request = HostRequestMock(host = realm.host)
            request.session = {} # type: ignore
            form = HomepageForm({'email': 'user@acme.com'}, realm=realm)
            self.assertIn("trying to join, zulip, only allows users with e-mail", form.errors['email'][0])

    def test_failed_signup_due_to_invite_required(self):
        # type: () -> None
        realm = get_realm('zulip')
        realm.invite_required = True
        realm.save()
        request = HostRequestMock(host = realm.host)
        request.session = {} # type: ignore
        form = HomepageForm({'email': 'user@zulip.com'}, realm=realm)
        self.assertIn("Please request an invite from", form.errors['email'][0])

    def test_failed_signup_due_to_nonexistent_realm(self):
        # type: () -> None
        with self.settings(REALMS_HAVE_SUBDOMAINS = True):
            request = HostRequestMock(host = 'acme.' + settings.EXTERNAL_HOST)
            request.session = {} # type: ignore
            form = HomepageForm({'email': 'user@acme.com'}, realm=None)
            self.assertIn("organization you are trying to join does not exist", form.errors['email'][0])

    def test_registration_through_ldap(self):
        # type: () -> None
        password = "testing"
        email = "newuser@zulip.com"
        subdomain = "zulip"
        realm_name = "Zulip"
        ldap_user_attr_map = {'full_name': 'fn', 'short_name': 'sn'}

        ldap_patcher = patch('django_auth_ldap.config.ldap.initialize')
        mock_initialize = ldap_patcher.start()
        mock_ldap = MockLDAP()
        mock_initialize.return_value = mock_ldap

        mock_ldap.directory = {
            'uid=newuser,ou=users,dc=zulip,dc=com': {
                'userPassword': 'testing',
                'fn': ['New User Name']
            }
        }

        with patch('zerver.views.registration.get_subdomain', return_value=subdomain):
            result = self.client_post('/register/', {'email': email})

        self.assertEqual(result.status_code, 302)
        self.assertTrue(result["Location"].endswith(
            "/accounts/send_confirm/%s" % (email,)))
        result = self.client_get(result["Location"])
        self.assert_in_response("Check your email so we can get started.", result)
        # Visit the confirmation link.
        from django.core.mail import outbox
        for message in reversed(outbox):
            if email in message.to:
                confirmation_link_pattern = re.compile(settings.EXTERNAL_HOST + "(\S+)>")
                confirmation_url = confirmation_link_pattern.search(
                    message.body).groups()[0]
                break
        else:
            raise AssertionError("Couldn't find a confirmation email.")

        with self.settings(
                POPULATE_PROFILE_VIA_LDAP=True,
                LDAP_APPEND_DOMAIN='zulip.com',
                AUTH_LDAP_BIND_PASSWORD='',
                AUTH_LDAP_USER_ATTR_MAP=ldap_user_attr_map,
                AUTHENTICATION_BACKENDS=('zproject.backends.ZulipLDAPAuthBackend',),
                AUTH_LDAP_USER_DN_TEMPLATE='uid=%(user)s,ou=users,dc=zulip,dc=com'):
            result = self.client_get(confirmation_url)
            self.assertEqual(result.status_code, 200)
            result = self.submit_reg_form_for_user(email,
                                                   password,
                                                   realm_name=realm_name,
                                                   realm_subdomain=subdomain,
                                                   from_confirmation='1',
                                                   # Pass HTTP_HOST for the target subdomain
                                                   HTTP_HOST=subdomain + ".testserver")

            self.assert_in_success_response(["You're almost there.",
                                             "New User Name",
                                             "newuser@zulip.com"],
                                            result)

            # Test the TypeError exception handler
            mock_ldap.directory = {
                'uid=newuser,ou=users,dc=zulip,dc=com': {
                    'userPassword': 'testing',
                    'fn': None  # This will raise TypeError
                }
            }
            result = self.submit_reg_form_for_user(email,
                                                   password,
                                                   realm_name=realm_name,
                                                   realm_subdomain=subdomain,
                                                   from_confirmation='1',
                                                   # Pass HTTP_HOST for the target subdomain
                                                   HTTP_HOST=subdomain + ".testserver")
            self.assert_in_success_response(["You're almost there.",
                                             "newuser@zulip.com"],
                                            result)

        mock_ldap.reset()
        mock_initialize.stop()

    @patch('DNS.dnslookup', return_value=[['sipbtest:*:20922:101:Fred Sipb,,,:/mit/sipbtest:/bin/athena/tcsh']])
    def test_registration_of_mirror_dummy_user(self, ignored):
        # type: (Any) -> None
        password = "test"
        email = "sipbtest@mit.edu"
        subdomain = "sipb"
        realm_name = "MIT"

        user_profile = get_user_profile_by_email(email)
        user_profile.is_mirror_dummy = True
        user_profile.is_active = False
        user_profile.save()

        result = self.client_post('/register/', {'email': email})

        self.assertEqual(result.status_code, 302)
        self.assertTrue(result["Location"].endswith(
            "/accounts/send_confirm/%s" % (email,)))
        result = self.client_get(result["Location"])
        self.assert_in_response("Check your email so we can get started.", result)
        # Visit the confirmation link.
        from django.core.mail import outbox
        for message in reversed(outbox):
            if email in message.to:
                confirmation_link_pattern = re.compile(settings.EXTERNAL_HOST + "(\S+)>")
                confirmation_url = confirmation_link_pattern.search(
                    message.body).groups()[0]
                break
        else:
            raise AssertionError("Couldn't find a confirmation email.")

        result = self.client_get(confirmation_url)
        self.assertEqual(result.status_code, 200)
        result = self.submit_reg_form_for_user(email,
                                               password,
                                               realm_name=realm_name,
                                               realm_subdomain=subdomain,
                                               from_confirmation='1',
                                               # Pass HTTP_HOST for the target subdomain
                                               HTTP_HOST=subdomain + ".testserver")
        self.assertEqual(result.status_code, 200)
        result = self.submit_reg_form_for_user(email,
                                               password,
                                               realm_name=realm_name,
                                               realm_subdomain=subdomain,
                                               # Pass HTTP_HOST for the target subdomain
                                               HTTP_HOST=subdomain + ".testserver")
        self.assertEqual(result.status_code, 302)
        self.assertEqual(get_session_dict_user(self.client.session), user_profile.id)

class DeactivateUserTest(ZulipTestCase):

    def test_deactivate_user(self):
        # type: () -> None
        email = 'hamlet@zulip.com'
        self.login(email)
        user = get_user_profile_by_email('hamlet@zulip.com')
        self.assertTrue(user.is_active)
        result = self.client_delete('/json/users/me')
        self.assert_json_success(result)
        user = get_user_profile_by_email('hamlet@zulip.com')
        self.assertFalse(user.is_active)
        self.login(email, fails=True)

    def test_do_not_deactivate_final_admin(self):
        # type: () -> None
        email = 'iago@zulip.com'
        self.login(email)
        user = get_user_profile_by_email('iago@zulip.com')
        self.assertTrue(user.is_active)
        result = self.client_delete('/json/users/me')
        self.assert_json_error(result, "Cannot deactivate the only organization administrator")
        user = get_user_profile_by_email('iago@zulip.com')
        self.assertTrue(user.is_active)
        self.assertTrue(user.is_realm_admin)
        email = 'hamlet@zulip.com'
        user_2 = get_user_profile_by_email('hamlet@zulip.com')
        do_change_is_admin(user_2, True)
        self.assertTrue(user_2.is_realm_admin)
        result = self.client_delete('/json/users/me')
        self.assert_json_success(result)
        do_change_is_admin(user, True)