# Pyrogram - Telegram MTProto API Client Library for Python
# Copyright (C) 2017-2018 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 pyrogram.api import functions, types
from ...ext import BaseClient, utils


class ForwardMessages(BaseClient):
    async def forward_messages(self,
                               chat_id: int or str,
                               from_chat_id: int or str,
                               message_ids,
                               disable_notification: bool = None):
        """Use this method to forward messages of any kind.

        Args:
            chat_id (``int`` | ``str``):
                Unique identifier (int) or username (str) of the target chat.
                For your personal cloud (Saved Messages) you can simply use "me" or "self".
                For a contact that exists in your Telegram address book you can use his phone number (str).
                For a private channel/supergroup you can use its *t.me/joinchat/* link.

            from_chat_id (``int`` | ``str``):
                Unique identifier (int) or username (str) of the source chat where the original message was sent.
                For your personal cloud (Saved Messages) you can simply use "me" or "self".
                For a contact that exists in your Telegram address book you can use his phone number (str).
                For a private channel/supergroup you can use its *t.me/joinchat/* link.

            message_ids (``iterable``):
                A list of Message identifiers in the chat specified in *from_chat_id* or a single message id.
                Iterators and Generators are also accepted.

            disable_notification (``bool``, *optional*):
                Sends the message silently.
                Users will receive a notification with no sound.

        Returns:
            On success and in case *message_ids* was a list, the returned value will be a list of the forwarded
            :obj:`Messages <pyrogram.Message>` even if a list contains just one element, otherwise if
            *message_ids* was an integer, the single forwarded :obj:`Message <pyrogram.Message>`
            is returned.

        Raises:
            :class:`Error <pyrogram.Error>`
        """
        is_iterable = not isinstance(message_ids, int)
        message_ids = list(message_ids) if is_iterable else [message_ids]

        r = await self.send(
            functions.messages.ForwardMessages(
                to_peer=await self.resolve_peer(chat_id),
                from_peer=await self.resolve_peer(from_chat_id),
                id=message_ids,
                silent=disable_notification or None,
                random_id=[self.rnd_id() for _ in message_ids]
            )
        )

        messages = []

        users = {i.id: i for i in r.users}
        chats = {i.id: i for i in r.chats}

        for i in r.updates:
            if isinstance(i, (types.UpdateNewMessage, types.UpdateNewChannelMessage)):
                messages.append(
                    await utils.parse_messages(
                        self, i.message,
                        users, chats
                    )
                )

        return messages if is_iterable else messages[0]