# Pyrogram - Telegram MTProto API Client Library for Python
# Copyright (C) 2017-2019 Dan Tès <https://github.com/delivrance>
#
# This file is part of Pyrogram.
#
# Pyrogram is free software: you can redistribute it and/or modify
# it under the terms of the GNU Lesser General Public License as published
# by the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# Pyrogram is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public License
# along with Pyrogram.  If not, see <http://www.gnu.org/licenses/>.

from typing import Union

from pyrogram.api import functions
from ...ext import BaseClient


class UpdateUsername(BaseClient):
    async def update_username(
        self,
        username: Union[str, None]
    ) -> bool:
        """Use this method to update your own username.
        
        This method only works for users, not bots. Bot usernames must be changed via Bot Support or by recreating
        them from scratch using BotFather. To update a channel or supergroup username you can use
        :meth:`update_chat_username`.

        Args:
            username (``str`` | ``None``):
                Username to set. "" (empty string) or None to remove the username.

        Returns:
            True on success.

        Raises:
            :class:`RPCError <pyrogram.RPCError>` in case of a Telegram RPC error.
        """

        return bool(
            await self.send(
                functions.account.UpdateUsername(
                    username=username or ""
                )
            )
        )