import tempfile
from datetime import datetime, timedelta, timezone
from unittest.mock import patch

import ldap
import orjson
from django.core import mail
from django.core.mail.message import EmailMultiAlternatives
from django.test import override_settings
from django.utils.timezone import now as timezone_now
from django_auth_ldap.config import LDAPSearch

from zerver.lib.email_notifications import (
    enqueue_welcome_emails,
    get_onboarding_email_schedule,
    send_account_registered_email,
)
from zerver.lib.send_email import (
    deliver_scheduled_emails,
    send_custom_email,
    send_custom_server_email,
)
from zerver.lib.test_classes import ZulipTestCase
from zerver.models import Realm, ScheduledEmail, UserProfile
from zerver.models.realms import get_realm
from zilencer.models import RemoteZulipServer


class TestCustomEmails(ZulipTestCase):
    def test_send_custom_email_argument(self) -> None:
        hamlet = self.example_user("hamlet")
        email_subject = "subject_test"
        reply_to = "reply_to_test"
        from_name = "from_name_test"

        with tempfile.NamedTemporaryFile() as markdown_template:
            markdown_template.write(b"# Some heading\n\nSome content\n{{ realm_name }}")
            markdown_template.flush()
            send_custom_email(
                UserProfile.objects.filter(id=hamlet.id),
                dry_run=False,
                options={
                    "markdown_template_path": markdown_template.name,
                    "reply_to": reply_to,
                    "subject": email_subject,
                    "from_name": from_name,
                },
            )
        self.assert_length(mail.outbox, 1)
        msg = mail.outbox[0]
        self.assertEqual(msg.subject, email_subject)
        self.assert_length(msg.reply_to, 1)
        self.assertEqual(msg.reply_to[0], reply_to)
        self.assertNotIn("{% block content %}", msg.body)
        self.assertIn("# Some heading", msg.body)
        self.assertIn("Zulip Dev", msg.body)
        self.assertNotIn("{{ realm_name }}", msg.body)
        self.assertNotIn("</div>", msg.body)

        assert isinstance(msg, EmailMultiAlternatives)
        self.assertIn("Some heading</h1>", str(msg.alternatives[0][0]))
        self.assertNotIn("{{ realm_name }}", str(msg.alternatives[0][0]))

    def test_send_custom_email_remote_server(self) -> None:
        email_subject = "subject_test"
        reply_to = "reply_to_test"
        from_name = "from_name_test"
        markdown_template_path = "templates/corporate/policies/index.md"
        send_custom_server_email(
            remote_servers=RemoteZulipServer.objects.all(),
            dry_run=False,
            options={
                "markdown_template_path": markdown_template_path,
                "reply_to": reply_to,
                "subject": email_subject,
                "from_name": from_name,
            },
        )
        self.assert_length(mail.outbox, 1)
        msg = mail.outbox[0]
        self.assertEqual(msg.subject, email_subject)
        self.assertEqual(msg.to, ["remotezulipserver@zulip.com"])
        self.assert_length(msg.reply_to, 1)
        self.assertEqual(msg.reply_to[0], reply_to)
        self.assertNotIn("{% block content %}", msg.body)
        # Verify that the HTML version contains the footer.
        assert isinstance(msg, EmailMultiAlternatives)
        self.assertIn(
            "You are receiving this email to update you about important changes to Zulip",
            str(msg.alternatives[0][0]),
        )

    def test_send_custom_email_headers(self) -> None:
        hamlet = self.example_user("hamlet")
        markdown_template_path = (
            "zerver/tests/fixtures/email/custom_emails/email_base_headers_test.md"
        )
        send_custom_email(
            UserProfile.objects.filter(id=hamlet.id),
            dry_run=False,
            options={
                "markdown_template_path": markdown_template_path,
            },
        )
        self.assert_length(mail.outbox, 1)
        msg = mail.outbox[0]
        self.assertEqual(msg.subject, "Test subject")
        self.assertFalse(msg.reply_to)
        self.assertEqual("Test body", msg.body)

    def test_send_custom_email_context(self) -> None:
        hamlet = self.example_user("hamlet")
        markdown_template_path = (
            "zerver/tests/fixtures/email/custom_emails/email_base_headers_test.md"
        )
        send_custom_email(
            UserProfile.objects.filter(id=hamlet.id),
            dry_run=False,
            options={
                "markdown_template_path": markdown_template_path,
            },
        )
        self.assert_length(mail.outbox, 1)
        msg = mail.outbox[0]

        # We default to not including an unsubscribe link in the headers
        self.assertEqual(msg.extra_headers.get("X-Auto-Response-Suppress"), "All")
        self.assertIsNone(msg.extra_headers.get("List-Unsubscribe"))

        mail.outbox = []
        markdown_template_path = (
            "zerver/tests/fixtures/email/custom_emails/email_base_headers_custom_test.md"
        )

        def add_context(context: dict[str, object], user: UserProfile) -> None:
            context["unsubscribe_link"] = "some@email"
            context["custom"] = str(user.id)

        send_custom_email(
            UserProfile.objects.filter(id=hamlet.id),
            dry_run=False,
            options={
                "markdown_template_path": markdown_template_path,
            },
            add_context=add_context,
        )
        self.assert_length(mail.outbox, 1)
        msg = mail.outbox[0]
        self.assertEqual(msg.extra_headers.get("X-Auto-Response-Suppress"), "All")
        self.assertEqual(msg.extra_headers.get("List-Unsubscribe"), "<some@email>")
        self.assertIn(f"Test body with {hamlet.id} value", msg.body)

    def test_send_custom_email_no_argument(self) -> None:
        hamlet = self.example_user("hamlet")
        from_name = "from_name_test"
        email_subject = "subject_test"
        markdown_template_path = (
            "zerver/tests/fixtures/email/custom_emails/email_base_headers_no_headers_test.md"
        )

        from zerver.lib.send_email import NoEmailArgumentError

        self.assertRaises(
            NoEmailArgumentError,
            send_custom_email,
            UserProfile.objects.filter(id=hamlet.id),
            dry_run=False,
            options={
                "markdown_template_path": markdown_template_path,
                "from_name": from_name,
            },
        )

        self.assertRaises(
            NoEmailArgumentError,
            send_custom_email,
            UserProfile.objects.filter(id=hamlet.id),
            dry_run=False,
            options={
                "markdown_template_path": markdown_template_path,
                "subject": email_subject,
            },
        )

    def test_send_custom_email_doubled_arguments(self) -> None:
        hamlet = self.example_user("hamlet")
        from_name = "from_name_test"
        email_subject = "subject_test"
        markdown_template_path = (
            "zerver/tests/fixtures/email/custom_emails/email_base_headers_test.md"
        )

        from zerver.lib.send_email import DoubledEmailArgumentError

        self.assertRaises(
            DoubledEmailArgumentError,
            send_custom_email,
            UserProfile.objects.filter(id=hamlet.id),
            dry_run=False,
            options={
                "markdown_template_path": markdown_template_path,
                "subject": email_subject,
            },
        )

        self.assertRaises(
            DoubledEmailArgumentError,
            send_custom_email,
            UserProfile.objects.filter(id=hamlet.id),
            dry_run=False,
            options={
                "markdown_template_path": markdown_template_path,
                "from_name": from_name,
            },
        )

    def test_send_custom_email_dry_run(self) -> None:
        hamlet = self.example_user("hamlet")
        email_subject = "subject_test"
        reply_to = "reply_to_test"
        from_name = "from_name_test"
        markdown_template_path = "templates/zerver/tests/markdown/test_nested_code_blocks.md"
        with patch("builtins.print") as _:
            send_custom_email(
                UserProfile.objects.filter(id=hamlet.id),
                dry_run=True,
                options={
                    "markdown_template_path": markdown_template_path,
                    "reply_to": reply_to,
                    "subject": email_subject,
                    "from_name": from_name,
                },
            )
            self.assert_length(mail.outbox, 0)


class TestFollowupEmails(ZulipTestCase):
    def test_account_registered_email_context(self) -> None:
        hamlet = self.example_user("hamlet")
        send_account_registered_email(hamlet)
        scheduled_emails = ScheduledEmail.objects.filter(users=hamlet).order_by(
            "scheduled_timestamp"
        )
        email_data = orjson.loads(scheduled_emails[0].data)
        self.assertEqual(email_data["context"]["email"], self.example_email("hamlet"))
        self.assertEqual(email_data["context"]["is_realm_admin"], False)
        self.assertEqual(
            email_data["context"]["getting_user_started_link"],
            "http://zulip.testserver/help/getting-started-with-zulip",
        )
        self.assertNotIn("ldap_username", email_data["context"])

        ScheduledEmail.objects.all().delete()

        iago = self.example_user("iago")
        send_account_registered_email(iago)
        scheduled_emails = ScheduledEmail.objects.filter(users=iago).order_by("scheduled_timestamp")
        email_data = orjson.loads(scheduled_emails[0].data)
        self.assertEqual(email_data["context"]["email"], self.example_email("iago"))
        self.assertEqual(email_data["context"]["is_realm_admin"], True)
        self.assertEqual(
            email_data["context"]["getting_organization_started_link"],
            "http://zulip.testserver/help/getting-your-organization-started-with-zulip",
        )
        self.assertEqual(
            email_data["context"]["getting_user_started_link"],
            "http://zulip.testserver/help/getting-started-with-zulip",
        )
        self.assertNotIn("ldap_username", email_data["context"])

    # See https://zulip.readthedocs.io/en/latest/production/authentication-methods.html#ldap-including-active-directory
    # for case details.
    @override_settings(
        AUTHENTICATION_BACKENDS=(
            "zproject.backends.ZulipLDAPAuthBackend",
            "zproject.backends.ZulipDummyBackend",
        ),
        # configure email search for email address in the uid attribute:
        AUTH_LDAP_REVERSE_EMAIL_SEARCH=LDAPSearch(
            "ou=users,dc=zulip,dc=com", ldap.SCOPE_ONELEVEL, "(uid=%(email)s)"
        ),
    )
    def test_account_registered_email_ldap_case_a_login_credentials(self) -> None:
        self.init_default_ldap_database()
        ldap_user_attr_map = {"full_name": "cn"}

        with self.settings(AUTH_LDAP_USER_ATTR_MAP=ldap_user_attr_map):
            self.login_with_return(
                "newuser_email_as_uid@zulip.com",
                self.ldap_password("newuser_email_as_uid@zulip.com"),
            )
            user = UserProfile.objects.get(delivery_email="newuser_email_as_uid@zulip.com")
            scheduled_emails = ScheduledEmail.objects.filter(users=user).order_by(
                "scheduled_timestamp"
            )

            self.assert_length(scheduled_emails, 3)
            email_data = orjson.loads(scheduled_emails[0].data)
            self.assertEqual(email_data["context"]["ldap"], True)
            self.assertEqual(
                email_data["context"]["ldap_username"], "newuser_email_as_uid@zulip.com"
            )

    @override_settings(
        AUTHENTICATION_BACKENDS=(
            "zproject.backends.ZulipLDAPAuthBackend",
            "zproject.backends.ZulipDummyBackend",
        )
    )
    def test_account_registered_email_ldap_case_b_login_credentials(self) -> None:
        self.init_default_ldap_database()
        ldap_user_attr_map = {"full_name": "cn"}

        with self.settings(
            LDAP_APPEND_DOMAIN="zulip.com",
            AUTH_LDAP_USER_ATTR_MAP=ldap_user_attr_map,
        ):
            self.login_with_return("newuser@zulip.com", self.ldap_password("newuser"))

            user = UserProfile.objects.get(delivery_email="newuser@zulip.com")
            scheduled_emails = ScheduledEmail.objects.filter(users=user).order_by(
                "scheduled_timestamp"
            )
            self.assert_length(scheduled_emails, 3)
            email_data = orjson.loads(scheduled_emails[0].data)
            self.assertEqual(email_data["context"]["ldap"], True)
            self.assertEqual(email_data["context"]["ldap_username"], "newuser")

    @override_settings(
        AUTHENTICATION_BACKENDS=(
            "zproject.backends.ZulipLDAPAuthBackend",
            "zproject.backends.ZulipDummyBackend",
        )
    )
    def test_account_registered_email_ldap_case_c_login_credentials(self) -> None:
        self.init_default_ldap_database()
        ldap_user_attr_map = {"full_name": "cn"}

        with self.settings(
            LDAP_EMAIL_ATTR="mail",
            AUTH_LDAP_USER_ATTR_MAP=ldap_user_attr_map,
        ):
            self.login_with_return("newuser_with_email", self.ldap_password("newuser_with_email"))
            user = UserProfile.objects.get(delivery_email="newuser_email@zulip.com")
            scheduled_emails = ScheduledEmail.objects.filter(users=user).order_by(
                "scheduled_timestamp"
            )
            self.assert_length(scheduled_emails, 3)
            email_data = orjson.loads(scheduled_emails[0].data)
            self.assertEqual(email_data["context"]["ldap"], True)
            self.assertEqual(email_data["context"]["ldap_username"], "newuser_with_email")

    def test_followup_emails_count(self) -> None:
        hamlet = self.example_user("hamlet")
        iago = self.example_user("iago")
        cordelia = self.example_user("cordelia")
        realm = get_realm("zulip")

        # Hamlet has account only in Zulip realm so all onboarding emails should be sent
        send_account_registered_email(self.example_user("hamlet"))
        enqueue_welcome_emails(self.example_user("hamlet"))
        scheduled_emails = ScheduledEmail.objects.filter(users=hamlet).order_by(
            "scheduled_timestamp"
        )
        self.assert_length(scheduled_emails, 3)
        self.assertEqual(
            orjson.loads(scheduled_emails[0].data)["template_prefix"],
            "zerver/emails/account_registered",
        )
        self.assertEqual(
            orjson.loads(scheduled_emails[1].data)["template_prefix"],
            "zerver/emails/onboarding_zulip_topics",
        )
        self.assertEqual(
            orjson.loads(scheduled_emails[2].data)["template_prefix"],
            "zerver/emails/onboarding_zulip_guide",
        )

        ScheduledEmail.objects.all().delete()

        # The onboarding_zulip_guide email should not be sent to non-admin users in organizations
        # that are sent the `/for/communities/` guide; see note in enqueue_welcome_emails.
        realm.org_type = Realm.ORG_TYPES["community"]["id"]
        realm.save()

        # Hamlet is not an admin so the `/for/communities/` zulip_guide should not be sent
        send_account_registered_email(self.example_user("hamlet"))
        enqueue_welcome_emails(self.example_user("hamlet"))
        scheduled_emails = ScheduledEmail.objects.filter(users=hamlet).order_by(
            "scheduled_timestamp"
        )
        self.assert_length(scheduled_emails, 2)
        self.assertEqual(
            orjson.loads(scheduled_emails[0].data)["template_prefix"],
            "zerver/emails/account_registered",
        )
        self.assertEqual(
            orjson.loads(scheduled_emails[1].data)["template_prefix"],
            "zerver/emails/onboarding_zulip_topics",
        )

        ScheduledEmail.objects.all().delete()

        # Iago is an admin so the `/for/communities/` zulip_guide should be sent
        send_account_registered_email(self.example_user("iago"))
        enqueue_welcome_emails(self.example_user("iago"))
        scheduled_emails = ScheduledEmail.objects.filter(users=iago).order_by("scheduled_timestamp")
        self.assert_length(scheduled_emails, 3)
        self.assertEqual(
            orjson.loads(scheduled_emails[0].data)["template_prefix"],
            "zerver/emails/account_registered",
        )
        self.assertEqual(
            orjson.loads(scheduled_emails[1].data)["template_prefix"],
            "zerver/emails/onboarding_zulip_topics",
        )
        self.assertEqual(
            orjson.loads(scheduled_emails[2].data)["template_prefix"],
            "zerver/emails/onboarding_zulip_guide",
        )

        ScheduledEmail.objects.all().delete()

        # The organization_type context for "education_nonprofit" orgs is simplified to be "education"
        realm.org_type = Realm.ORG_TYPES["education_nonprofit"]["id"]
        realm.save()

        # Cordelia has account in more than 1 realm so onboarding_zulip_topics email should not be sent
        send_account_registered_email(self.example_user("cordelia"))
        enqueue_welcome_emails(self.example_user("cordelia"))
        scheduled_emails = ScheduledEmail.objects.filter(users=cordelia).order_by(
            "scheduled_timestamp"
        )
        self.assert_length(scheduled_emails, 2)
        self.assertEqual(
            orjson.loads(scheduled_emails[0].data)["template_prefix"],
            "zerver/emails/account_registered",
        )
        self.assertEqual(
            orjson.loads(scheduled_emails[1].data)["template_prefix"],
            "zerver/emails/onboarding_zulip_guide",
        )
        self.assertEqual(
            orjson.loads(scheduled_emails[1].data)["context"]["organization_type"],
            "education",
        )

        ScheduledEmail.objects.all().delete()

        # Only a subset of Realm.ORG_TYPES are sent the zulip_guide_followup email
        realm.org_type = Realm.ORG_TYPES["other"]["id"]
        realm.save()

        # In this case, Cordelia should only be sent the account_registered email
        send_account_registered_email(self.example_user("cordelia"))
        enqueue_welcome_emails(self.example_user("cordelia"))
        scheduled_emails = ScheduledEmail.objects.filter(users=cordelia)
        self.assert_length(scheduled_emails, 1)
        self.assertEqual(
            orjson.loads(scheduled_emails[0].data)["template_prefix"],
            "zerver/emails/account_registered",
        )

    def test_followup_emails_for_regular_realms(self) -> None:
        cordelia = self.example_user("cordelia")
        send_account_registered_email(self.example_user("cordelia"), realm_creation=True)
        enqueue_welcome_emails(self.example_user("cordelia"), realm_creation=True)
        scheduled_emails = ScheduledEmail.objects.filter(users=cordelia).order_by(
            "scheduled_timestamp"
        )
        assert scheduled_emails is not None
        self.assert_length(scheduled_emails, 3)
        self.assertEqual(
            orjson.loads(scheduled_emails[0].data)["template_prefix"],
            "zerver/emails/account_registered",
        )
        self.assertEqual(
            orjson.loads(scheduled_emails[1].data)["template_prefix"],
            "zerver/emails/onboarding_zulip_guide",
        )
        self.assertEqual(
            orjson.loads(scheduled_emails[2].data)["template_prefix"],
            "zerver/emails/onboarding_team_to_zulip",
        )

        deliver_scheduled_emails(scheduled_emails[0])
        from django.core.mail import outbox

        self.assert_length(outbox, 1)

        message = outbox[0]
        self.assertIn("you have created a new Zulip organization", message.body)
        self.assertNotIn("demo org", message.body)

    def test_followup_emails_for_demo_realms(self) -> None:
        cordelia = self.example_user("cordelia")
        cordelia.realm.demo_organization_scheduled_deletion_date = timezone_now() + timedelta(
            days=30
        )
        cordelia.realm.save()
        send_account_registered_email(self.example_user("cordelia"), realm_creation=True)
        enqueue_welcome_emails(self.example_user("cordelia"), realm_creation=True)
        scheduled_emails = ScheduledEmail.objects.filter(users=cordelia).order_by(
            "scheduled_timestamp"
        )
        assert scheduled_emails is not None
        self.assert_length(scheduled_emails, 3)
        self.assertEqual(
            orjson.loads(scheduled_emails[0].data)["template_prefix"],
            "zerver/emails/account_registered",
        )
        self.assertEqual(
            orjson.loads(scheduled_emails[1].data)["template_prefix"],
            "zerver/emails/onboarding_zulip_guide",
        )
        self.assertEqual(
            orjson.loads(scheduled_emails[2].data)["template_prefix"],
            "zerver/emails/onboarding_team_to_zulip",
        )

        deliver_scheduled_emails(scheduled_emails[0])
        from django.core.mail import outbox

        self.assert_length(outbox, 1)

        message = outbox[0]
        self.assertIn("you have created a new demo Zulip organization", message.body)

    def test_onboarding_zulip_guide_with_invalid_org_type(self) -> None:
        cordelia = self.example_user("cordelia")
        realm = get_realm("zulip")

        invalid_org_type_id = 999
        realm.org_type = invalid_org_type_id
        realm.save()

        with self.assertLogs(level="ERROR") as m:
            enqueue_welcome_emails(self.example_user("cordelia"))

        scheduled_emails = ScheduledEmail.objects.filter(users=cordelia)
        self.assert_length(scheduled_emails, 0)
        self.assertEqual(
            m.output,
            [f"ERROR:root:Unknown organization type '{invalid_org_type_id}'"],
        )


class TestOnboardingEmailDelay(ZulipTestCase):
    def verify_onboarding_email_schedule(
        self,
        user: UserProfile,
        date_joined: str,
        onboarding_zulip_topics: int,
        onboarding_zulip_guide: int,
        onboarding_team_to_zulip: int,
    ) -> None:
        DAY_OF_WEEK = {
            "Monday": datetime(2018, 1, 1, 1, 0, 0, 0, tzinfo=timezone.utc),
            "Tuesday": datetime(2018, 1, 2, 1, 0, 0, 0, tzinfo=timezone.utc),
            "Wednesday": datetime(2018, 1, 3, 1, 0, 0, 0, tzinfo=timezone.utc),
            "Thursday": datetime(2018, 1, 4, 1, 0, 0, 0, tzinfo=timezone.utc),
            "Friday": datetime(2018, 1, 5, 1, 0, 0, 0, tzinfo=timezone.utc),
            "Saturday": datetime(2018, 1, 6, 1, 0, 0, 0, tzinfo=timezone.utc),
            "Sunday": datetime(2018, 1, 7, 1, 0, 0, 0, tzinfo=timezone.utc),
        }
        WEEKEND = [6, 7]

        user.date_joined = DAY_OF_WEEK[date_joined]
        onboarding_email_schedule = get_onboarding_email_schedule(user)

        # onboarding_zulip_topics
        day_sent = (
            DAY_OF_WEEK[date_joined] + onboarding_email_schedule["onboarding_zulip_topics"]
        ).isoweekday()
        self.assertEqual(day_sent, onboarding_zulip_topics)
        self.assertNotIn(day_sent, WEEKEND)

        # onboarding_zulip_guide
        day_sent = (
            DAY_OF_WEEK[date_joined] + onboarding_email_schedule["onboarding_zulip_guide"]
        ).isoweekday()
        self.assertEqual(day_sent, onboarding_zulip_guide)
        self.assertNotIn(day_sent, WEEKEND)

        # onboarding_team_to_zulip
        day_sent = (
            DAY_OF_WEEK[date_joined] + onboarding_email_schedule["onboarding_team_to_zulip"]
        ).isoweekday()
        self.assertEqual(day_sent, onboarding_team_to_zulip)
        self.assertNotIn(day_sent, WEEKEND)

    def test_get_onboarding_email_schedule(self) -> None:
        user_profile = self.example_user("hamlet")

        # joined Monday: schedule = Wednesday:3, Friday:5, Tuesday:2
        self.verify_onboarding_email_schedule(user_profile, "Monday", 3, 5, 2)

        # joined Tuesday: schedule = Thursday:4, Monday:1, Wednesday:3
        self.verify_onboarding_email_schedule(user_profile, "Tuesday", 4, 1, 3)

        # joined Wednesday: schedule = Friday:5, Tuesday:2, Thursday:4
        self.verify_onboarding_email_schedule(user_profile, "Wednesday", 5, 2, 4)

        # joined Thursday: schedule = Monday:1, Wednesday:3, Friday:5
        self.verify_onboarding_email_schedule(user_profile, "Thursday", 1, 3, 5)

        # joined Friday: schedule = Tuesday:2, Thursday:4, Monday:1
        self.verify_onboarding_email_schedule(user_profile, "Friday", 2, 4, 1)

        # joined Saturday: schedule = Monday:1, Wednesday:3, Friday:5
        self.verify_onboarding_email_schedule(user_profile, "Saturday", 1, 3, 5)

        # joined Sunday: schedule = Tuesday:2, Thursday:4, Monday:1
        self.verify_onboarding_email_schedule(user_profile, "Sunday", 2, 4, 1)

    def test_time_offset_for_onboarding_email_schedule(self) -> None:
        user_profile = self.example_user("hamlet")
        days_delayed = {
            "4": timedelta(days=4, hours=-1),
            "6": timedelta(days=6, hours=-1),
            "8": timedelta(days=8, hours=-1),
        }

        # Time offset of America/Phoenix is -07:00
        user_profile.timezone = "America/Phoenix"

        # Test date_joined == Friday in UTC, but Thursday in the user's time zone
        user_profile.date_joined = datetime(2018, 1, 5, 1, 0, 0, 0, tzinfo=timezone.utc)
        onboarding_email_schedule = get_onboarding_email_schedule(user_profile)

        # onboarding_zulip_topics email sent on Monday
        self.assertEqual(
            onboarding_email_schedule["onboarding_zulip_topics"],
            days_delayed["4"],
        )

        # onboarding_zulip_guide sent on Wednesday
        self.assertEqual(
            onboarding_email_schedule["onboarding_zulip_guide"],
            days_delayed["6"],
        )

        # onboarding_team_to_zulip sent on Friday
        self.assertEqual(
            onboarding_email_schedule["onboarding_team_to_zulip"],
            days_delayed["8"],
        )


class TestCustomWelcomeEmailSender(ZulipTestCase):
    def test_custom_welcome_email_sender(self) -> None:
        name = "Nonreg Email"
        email = self.nonreg_email("test")
        with override_settings(
            WELCOME_EMAIL_SENDER={
                "name": name,
                "email": email,
            }
        ):
            hamlet = self.example_user("hamlet")
            enqueue_welcome_emails(hamlet)
            scheduled_emails = ScheduledEmail.objects.filter(users=hamlet).order_by(
                "scheduled_timestamp"
            )
            email_data = orjson.loads(scheduled_emails[0].data)
            self.assertEqual(email_data["from_name"], name)
            self.assertEqual(email_data["from_address"], email)