#  Pyrogram - Telegram MTProto API Client Library for Python
#  Copyright (C) 2017-2020 Dan <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 import raw
from pyrogram.scaffold import Scaffold


class UnpinChatMessage(Scaffold):
    async def unpin_chat_message(
        self,
        chat_id: Union[int, str],
        message_id: int = 0
    ) -> bool:
        """Unpin a message in a group, channel or your own chat.
        You must be an administrator in the chat for this to work and must have the "can_pin_messages" admin
        right in the supergroup or "can_edit_messages" admin right in the channel.

        Parameters:
            chat_id (``int`` | ``str``):
                Unique identifier (int) or username (str) of the target chat.

            message_id (``int``, *optional*):
                Identifier of a message to unpin.
                If not specified, the most recent pinned message (by sending date) will be unpinned.

        Returns:
            ``bool``: True on success.

        Example:
            .. code-block:: python

                app.unpin_chat_message(chat_id, message_id)
        """
        await self.send(
            raw.functions.messages.UpdatePinnedMessage(
                peer=await self.resolve_peer(chat_id),
                id=message_id,
                unpin=True
            )
        )

        return True