from argparse import ArgumentParser
from typing import Any, List

from django.contrib.auth.tokens import default_token_generator

from zerver.forms import generate_password_reset_url
from zerver.lib.management import CommandError, ZulipBaseCommand
from zerver.lib.send_email import FromAddress, send_email
from zerver.models import UserProfile


class Command(ZulipBaseCommand):
    help = """Send email to specified email address."""

    def add_arguments(self, parser: ArgumentParser) -> None:
        parser.add_argument(
            "--entire-server", action="store_true", help="Send to every user on the server. "
        )
        self.add_user_list_args(
            parser,
            help="Email addresses of user(s) to send password reset emails to.",
            all_users_help="Send to every user on the realm.",
        )
        self.add_realm_args(parser)

    def handle(self, *args: Any, **options: str) -> None:
        if options["entire_server"]:
            users = UserProfile.objects.filter(is_active=True, is_bot=False, is_mirror_dummy=False)
        else:
            realm = self.get_realm(options)
            try:
                users = self.get_users(options, realm, is_bot=False)
            except CommandError as error:
                if str(error) == "You have to pass either -u/--users or -a/--all-users.":
                    raise CommandError(
                        "You have to pass -u/--users or -a/--all-users or --entire-server."
                    )
                raise error

        self.send(users)

    def send(self, users: List[UserProfile]) -> None:
        """Sends one-use only links for resetting password to target users"""
        for user_profile in users:
            context = {
                "email": user_profile.delivery_email,
                "reset_url": generate_password_reset_url(user_profile, default_token_generator),
                "realm_uri": user_profile.realm.uri,
                "realm_name": user_profile.realm.name,
                "active_account_in_realm": True,
            }
            send_email(
                "zerver/emails/password_reset",
                to_user_ids=[user_profile.id],
                from_address=FromAddress.tokenized_no_reply_address(),
                from_name=FromAddress.security_email_from_name(user_profile=user_profile),
                context=context,
            )