from argparse import ArgumentParser
from typing import Any

from zerver.lib.actions import do_rename_stream
from zerver.lib.management import ZulipBaseCommand
from zerver.models import get_stream


class Command(ZulipBaseCommand):
    help = """Change the stream name for a realm."""

    def add_arguments(self, parser: ArgumentParser) -> None:
        parser.add_argument("old_name", metavar="<old name>", help="name of stream to be renamed")
        parser.add_argument(
            "new_name", metavar="<new name>", help="new name to rename the stream to"
        )
        self.add_realm_args(parser, required=True)

    def handle(self, *args: Any, **options: str) -> None:
        realm = self.get_realm(options)
        assert realm is not None  # Should be ensured by parser
        old_name = options["old_name"]
        new_name = options["new_name"]

        stream = get_stream(old_name, realm)
        do_rename_stream(stream, new_name, self.user_profile)