from typing import Any

from django.conf import settings
from django.core.mail import mail_admins, mail_managers, send_mail
from django.core.management import CommandError
from django.core.management.commands import sendtestemail

from zerver.lib.send_email import FromAddress


class Command(sendtestemail.Command):
    def handle(self, *args: Any, **kwargs: str) -> None:
        if settings.WARN_NO_EMAIL:
            raise CommandError("Outgoing email not yet configured, see\n  "
                               "https://zulip.readthedocs.io/en/latest/production/email.html")
        if len(kwargs['email']) == 0:
            raise CommandError("Usage: /home/zulip/deployments/current/manage.py "
                               "send_test_email username@example.com")

        print("If you run into any trouble, read:")
        print()
        print("  https://zulip.readthedocs.io/en/latest/production/email.html#troubleshooting")
        print()
        print("The most common error is not setting `ADD_TOKENS_TO_NOREPLY_ADDRESS=False` when")
        print("using an email provider that doesn't support that feature.")
        print()
        print("Sending 2 test emails from:")

        message = ("Success!  If you receive this message (and a second with a different subject), "
                   "you've successfully configured sending emails from your Zulip server.  "
                   "Remember that you need to restart "
                   "the Zulip server with /home/zulip/deployments/current/scripts/restart-server "
                   "after changing the settings in /etc/zulip before your changes will take effect.")
        sender = FromAddress.SUPPORT
        print(f"  * {sender}")
        send_mail("Zulip email test", message, sender, kwargs['email'])
        noreply_sender = FromAddress.tokenized_no_reply_address()
        print(f"  * {noreply_sender}")
        send_mail("Zulip noreply email test", message, noreply_sender, kwargs['email'])
        print()
        print("Successfully sent 2 emails to {}!".format(", ".join(kwargs['email'])))

        if kwargs['managers']:
            mail_managers("Zulip manager email test", "This email was sent to the site managers.")

        if kwargs['admins']:
            mail_admins("Zulip admins email test", "This email was sent to the site admins.")