#  kymang - Telegram MTProto API Client Library for Python
#  Copyright (C) 2017-present Dan <https://github.com/delivrance>
#
#  This file is part of kymang.
#
#  kymang 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.
#
#  kymang 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 kymang.  If not, see <http://www.gnu.org/licenses/>.

from datetime import datetime
from typing import Union

import kymang
from kymang import raw, utils
from kymang import types


class CreateChatInviteLink:
    async def create_chat_invite_link(
        self: "kymang.Client",
        chat_id: Union[int, str],
        name: str = None,
        expire_date: datetime = None,
        member_limit: int = None,
        creates_join_request: bool = None
    ) -> "types.ChatInviteLink":
        """Create an additional invite link for a chat.

        You must be an administrator in the chat for this to work and must have the appropriate admin rights.

        The link can be revoked using the method :meth:`~kymang.Client.revoke_chat_invite_link`.

        .. include:: /_includes/usable-by/users-bots.rst

        Parameters:
            chat_id (``int`` | ``str``):
                Unique identifier for the target chat or username of the target channel/supergroup
                (in the format @username).

            name (``str``, *optional*):
                Invite link name.

            expire_date (:py:obj:`~datetime.datetime`, *optional*):
                Point in time when the link will expire.
                Defaults to None (no expiration date).

            member_limit (``int``, *optional*):
                Maximum number of users that can be members of the chat simultaneously after joining the chat via
                this invite link; 1-99999.
                Defaults to None (no member limit).

            creates_join_request (``bool``, *optional*):
                True, if users joining the chat via the link need to be approved by chat administrators.
                If True, member_limit can't be specified.

        Returns:
            :obj:`~kymang.types.ChatInviteLink`: On success, the new invite link is returned.

        Example:
            .. code-block:: python

                # Create a new link without limits
                link = await app.create_chat_invite_link(chat_id)

                # Create a new link for up to 3 new users
                link = await app.create_chat_invite_link(chat_id, member_limit=3)
        """
        r = await self.invoke(
            raw.functions.messages.ExportChatInvite(
                peer=await self.resolve_peer(chat_id),
                expire_date=utils.datetime_to_timestamp(expire_date),
                usage_limit=member_limit,
                title=name,
                request_needed=creates_join_request
            )
        )

        return types.ChatInviteLink._parse(self, r)
