text: import itertools
  import typing
  
  from .buttons import ButtonMethods
  from .messageparse import MessageParseMethods
  from .uploads import UploadMethods
  from .. import utils, errors, hints
  from ..requestiter import RequestIter
  from ..tl import types, functions
  
  _MAX_CHUNK_SIZE = 100
  
  if typing.TYPE_CHECKING:
      from .telegramclient import TelegramClient
  
  
  class _MessagesIter(RequestIter):
      """
      Common factor for all requests that need to iterate over messages.
      """
      async def _init(
              self, entity, offset_id, min_id, max_id,
              from_user, offset_date, add_offset, filter, search
      ):
          # Note that entity being ``None`` will perform a global search.
          if entity:
              self.entity = await self.client.get_input_entity(entity)
          else:
              self.entity = None
              if self.reverse:
                  raise ValueError('Cannot reverse global search')
  
          # Telegram doesn't like min_id/max_id. If these IDs are low enough
          # (starting from last_id - 100), the request will return nothing.
          #
          # We can emulate their behaviour locally by setting offset = max_id
          # and simply stopping once we hit a message with ID <= min_id.
          if self.reverse:
              offset_id = max(offset_id, min_id)
              if offset_id and max_id:
                  if max_id - offset_id <= 1:
                      raise StopAsyncIteration
  
              if not max_id:
                  max_id = float('inf')
          else:
              offset_id = max(offset_id, max_id)
              if offset_id and min_id:
                  if offset_id - min_id <= 1:
                      raise StopAsyncIteration
  
          if self.reverse:
              if offset_id:
                  offset_id += 1
              elif not offset_date:
                  # offset_id has priority over offset_date, so don't
                  # set offset_id to 1 if we want to offset by date.
                  offset_id = 1
  
          if from_user:
              from_user = await self.client.get_input_entity(from_user)
              if not isinstance(from_user, (
                      types.InputPeerUser, types.InputPeerSelf)):
                  from_user = None  # Ignore from_user unless it's a user
  
          if from_user:
              self.from_id = await self.client.get_peer_id(from_user)
          else:
              self.from_id = None
  
          if not self.entity:
              self.request = functions.messages.SearchGlobalRequest(
                  q=search or '',
                  offset_rate=offset_date,
                  offset_peer=types.InputPeerEmpty(),
                  offset_id=offset_id,
                  limit=1
              )
          elif search is not None or filter or from_user:
              if filter is None:
                  filter = types.InputMessagesFilterEmpty()
  
              # Telegram completely ignores `from_id` in private chats
              if isinstance(
                      self.entity, (types.InputPeerUser, types.InputPeerSelf)):
                  # Don't bother sending `from_user` (it's ignored anyway),
                  # but keep `from_id` defined above to check it locally.
                  from_user = None
              else:
                  # Do send `from_user` to do the filtering server-side,
                  # and set `from_id` to None to avoid checking it locally.
                  self.from_id = None
  
              self.request = functions.messages.SearchRequest(
                  peer=self.entity,
                  q=search or '',
                  filter=filter() if isinstance(filter, type) else filter,
                  min_date=None,
                  max_date=offset_date,
                  offset_id=offset_id,
                  add_offset=add_offset,
                  limit=0,  # Search actually returns 0 items if we ask it to
                  max_id=0,
                  min_id=0,
                  hash=0,
                  from_id=from_user
              )
  
              # Workaround issue #1124 until a better solution is found.
              # Telegram seemingly ignores `max_date` if `filter` (and
              # nothing else) is specified, so we have to rely on doing
              # a first request to offset from the ID instead.
              #
              # Even better, using `filter` and `from_id` seems to always
              # trigger `RPC_CALL_FAIL` which is "internal issues"...
              if filter and offset_date and not search and not offset_id:
                  async for m in self.client.iter_messages(
                          self.entity, 1, offset_date=offset_date):
                      self.request.offset_id = m.id + 1
          else:
              self.request = functions.messages.GetHistoryRequest(
                  peer=self.entity,
                  limit=1,
                  offset_date=offset_date,
                  offset_id=offset_id,
                  min_id=0,
                  max_id=0,
                  add_offset=add_offset,
                  hash=0
              )
  
          if self.limit <= 0:
              # No messages, but we still need to know the total message count
              result = await self.client(self.request)
              if isinstance(result, types.messages.MessagesNotModified):
                  self.total = result.count
              else:
                  self.total = getattr(result, 'count', len(result.messages))
              raise StopAsyncIteration
  
          if self.wait_time is None:
              self.wait_time = 1 if self.limit > 3000 else 0
  
          # When going in reverse we need an offset of `-limit`, but we
          # also want to respect what the user passed, so add them together.
          if self.reverse:
              self.request.add_offset -= _MAX_CHUNK_SIZE
  
          self.add_offset = add_offset
          self.max_id = max_id
          self.min_id = min_id
          self.last_id = 0 if self.reverse else float('inf')
  
      async def _load_next_chunk(self):
          self.request.limit = min(self.left, _MAX_CHUNK_SIZE)
          if self.reverse and self.request.limit != _MAX_CHUNK_SIZE:
              # Remember that we need -limit when going in reverse
              self.request.add_offset = self.add_offset - self.request.limit
  
          r = await self.client(self.request)
          self.total = getattr(r, 'count', len(r.messages))
  
          entities = {utils.get_peer_id(x): x
                      for x in itertools.chain(r.users, r.chats)}
  
          messages = reversed(r.messages) if self.reverse else r.messages
          for message in messages:
              if (isinstance(message, types.MessageEmpty)
                      or self.from_id and message.from_id != self.from_id):
                  continue
  
              if not self._message_in_range(message):
                  return True
  
              # There has been reports that on bad connections this method
              # was returning duplicated IDs sometimes. Using ``last_id``
              # is an attempt to avoid these duplicates, since the message
              # IDs are returned in descending order (or asc if reverse).
              self.last_id = message.id
              message._finish_init(self.client, entities, self.entity)
              self.buffer.append(message)
  
          if len(r.messages) < self.request.limit:
              return True
  
          # Get the last message that's not empty (in some rare cases
          # it can happen that the last message is :tl:`MessageEmpty`)
          if self.buffer:
              self._update_offset(self.buffer[-1])
          else:
              # There are some cases where all the messages we get start
              # being empty. This can happen on migrated mega-groups if
              # the history was cleared, and we're using search. Telegram
              # acts incredibly weird sometimes. Messages are returned but
              # only "empty", not their contents. If this is the case we
              # should just give up since there won't be any new Message.
              return True
  
      def _message_in_range(self, message):
          """
          Determine whether the given message is in the range or
          it should be ignored (and avoid loading more chunks).
          """
          # No entity means message IDs between chats may vary
          if self.entity:
              if self.reverse:
                  if message.id <= self.last_id or message.id >= self.max_id:
                      return False
              else:
                  if message.id >= self.last_id or message.id <= self.min_id:
                      return False
  
          return True
  
      def _update_offset(self, last_message):
          """
          After making the request, update its offset with the last message.
          """
          self.request.offset_id = last_message.id
          if self.reverse:
              # We want to skip the one we already have
              self.request.offset_id += 1
  
          if isinstance(self.request, functions.messages.SearchRequest):
              # Unlike getHistory and searchGlobal that use *offset* date,
              # this is *max* date. This means that doing a search in reverse
              # will break it. Since it's not really needed once we're going
              # (only for the first request), it's safe to just clear it off.
              self.request.max_date = None
          else:
              # getHistory and searchGlobal call it offset_date
              self.request.offset_date = last_message.date
  
          if isinstance(self.request, functions.messages.SearchGlobalRequest):
              self.request.offset_peer = last_message.input_chat
  
  
  class _IDsIter(RequestIter):
      async def _init(self, entity, ids):
          # TODO We never actually split IDs in chunks, but maybe we should
          if not utils.is_list_like(ids):
              ids = [ids]
          elif not ids:
              raise StopAsyncIteration
          elif self.reverse:
              ids = list(reversed(ids))
          else:
              ids = ids
  
          if entity:
              entity = await self.client.get_input_entity(entity)
  
          self.total = len(ids)
  
          from_id = None  # By default, no need to validate from_id
          if isinstance(entity, (types.InputChannel, types.InputPeerChannel)):
              try:
                  r = await self.client(
                      functions.channels.GetMessagesRequest(entity, ids))
              except errors.MessageIdsEmptyError:
                  # All IDs were invalid, use a dummy result
                  r = types.messages.MessagesNotModified(len(ids))
          else:
              r = await self.client(functions.messages.GetMessagesRequest(ids))
              if entity:
                  from_id = await self.client.get_peer_id(entity)
  
          if isinstance(r, types.messages.MessagesNotModified):
              self.buffer.extend(None for _ in ids)
              return
  
          entities = {utils.get_peer_id(x): x
                      for x in itertools.chain(r.users, r.chats)}
  
          # Telegram seems to return the messages in the order in which
          # we asked them for, so we don't need to check it ourselves,
          # unless some messages were invalid in which case Telegram
          # may decide to not send them at all.
          #
          # The passed message IDs may not belong to the desired entity
          # since the user can enter arbitrary numbers which can belong to
          # arbitrary chats. Validate these unless ``from_id is None``.
          for message in r.messages:
              if isinstance(message, types.MessageEmpty) or (
                      from_id and message.chat_id != from_id):
                  self.buffer.append(None)
              else:
                  message._finish_init(self.client, entities, entity)
                  self.buffer.append(message)
  
      async def _load_next_chunk(self):
          return True  # no next chunk, all done in init
  
  
  class MessageMethods(UploadMethods, ButtonMethods, MessageParseMethods):
  
      # region Public methods
  
      # region Message retrieval
  
      def iter_messages(
              self: 'TelegramClient',
              entity: 'hints.EntityLike',
              limit: float = None,
              *,
              offset_date: 'hints.DateLike' = None,
              offset_id: int = 0,
              max_id: int = 0,
              min_id: int = 0,
              add_offset: int = 0,
              search: str = None,
              filter: 'typing.Union[types.TypeMessagesFilter, typing.Type[types.TypeMessagesFilter]]' = None,
              from_user: 'hints.EntityLike' = None,
              wait_time: float = None,
              ids: 'typing.Union[int, typing.Sequence[int]]' = None,
              reverse: bool = False
      ) -> 'typing.Union[_MessagesIter, _IDsIter]':
          """
          Iterator over the messages for the given chat.
  
          If either `search`, `filter` or `from_user` are provided,
          :tl:`messages.Search` will be used instead of :tl:`messages.getHistory`.
  
          .. note::
  
              Telegram's flood wait limit for :tl:`GetHistoryRequest` seems to
              be around 30 seconds per 10 requests, therefore a sleep of 1
              second is the default for this limit (or above).
  
          Arguments
              entity (`entity`):
                  The entity from whom to retrieve the message history.
  
                  It may be ``None`` to perform a global search, or
                  to get messages by their ID from no particular chat.
                  Note that some of the offsets will not work if this
                  is the case.
  
                  Note that if you want to perform a global search,
                  you **must** set a non-empty `search` string.
  
              limit (`int` | `None`, optional):
                  Number of messages to be retrieved. Due to limitations with
                  the API retrieving more than 3000 messages will take longer
                  than half a minute (or even more based on previous calls).
  
                  The limit may also be ``None``, which would eventually return
                  the whole history.
  
              offset_date (`datetime`):
                  Offset date (messages *previous* to this date will be
                  retrieved). Exclusive.
  
              offset_id (`int`):
                  Offset message ID (only messages *previous* to the given
                  ID will be retrieved). Exclusive.
  
              max_id (`int`):
                  All the messages with a higher (newer) ID or equal to this will
                  be excluded.
  
              min_id (`int`):
                  All the messages with a lower (older) ID or equal to this will
                  be excluded.
  
              add_offset (`int`):
                  Additional message offset (all of the specified offsets +
                  this offset = older messages).
  
              search (`str`):
                  The string to be used as a search query.
  
              filter (:tl:`MessagesFilter` | `type`):
                  The filter to use when returning messages. For instance,
                  :tl:`InputMessagesFilterPhotos` would yield only messages
                  containing photos.
  
              from_user (`entity`):
                  Only messages from this user will be returned.
                  This parameter will be ignored if it is not an user.
  
              wait_time (`int`):
                  Wait time (in seconds) between different
                  :tl:`GetHistoryRequest`. Use this parameter to avoid hitting
                  the ``FloodWaitError`` as needed. If left to ``None``, it will
                  default to 1 second only if the limit is higher than 3000.
  
              ids (`int`, `list`):
                  A single integer ID (or several IDs) for the message that
                  should be returned. This parameter takes precedence over
                  the rest (which will be ignored if this is set). This can
                  for instance be used to get the message with ID 123 from
                  a channel. Note that if the message doesn't exist, ``None``
                  will appear in its place, so that zipping the list of IDs
                  with the messages can match one-to-one.
  
                  .. note::
  
                      At the time of writing, Telegram will **not** return
                      :tl:`MessageEmpty` for :tl:`InputMessageReplyTo` IDs that
                      failed (i.e. the message is not replying to any, or is
                      replying to a deleted message). This means that it is
                      **not** possible to match messages one-by-one, so be
                      careful if you use non-integers in this parameter.
  
              reverse (`bool`, optional):
                  If set to ``True``, the messages will be returned in reverse
                  order (from oldest to newest, instead of the default newest
                  to oldest). This also means that the meaning of `offset_id`
                  and `offset_date` parameters is reversed, although they will
                  still be exclusive. `min_id` becomes equivalent to `offset_id`
                  instead of being `max_id` as well since messages are returned
                  in ascending order.
  
                  You cannot use this if both `entity` and `ids` are ``None``.
  
          Yields
              Instances of `telethon.tl.custom.message.Message`.
  
          Example
              .. code-block:: python
  
                  # From most-recent to oldest
                  for message in client.iter_messages(chat):
                      print(message.id, message.text)
  
                  # From oldest to most-recent
                  for message in client.iter_messages(chat, reverse=True):
                      print(message.id, message.text)
  
                  # Filter by sender
                  for message in client.iter_messages(chat, from_user='me'):
                      print(message.text)
  
                  # Server-side search with fuzzy text
                  for message in client.iter_messages(chat, search='hello'):
                      print(message.id)
  
                  # Filter by message type:
                  from telethon.tl.types import InputMessagesFilterPhotos
                  for message in client.iter_messages(chat, filter=InputMessagesFilterPhotos):
                      print(message.photo)
          """
          if ids is not None:
              return _IDsIter(self, limit, entity=entity, ids=ids)
  
          return _MessagesIter(
              client=self,
              reverse=reverse,
              wait_time=wait_time,
              limit=limit,
              entity=entity,
              offset_id=offset_id,
              min_id=min_id,
              max_id=max_id,
              from_user=from_user,
              offset_date=offset_date,
              add_offset=add_offset,
              filter=filter,
              search=search
          )
  
      async def get_messages(self: 'TelegramClient', *args, **kwargs) -> 'hints.TotalList':
          """
          Same as `iter_messages()`, but returns a
          `TotalList <telethon.helpers.TotalList>` instead.
  
          If the `limit` is not set, it will be 1 by default unless both
          `min_id` **and** `max_id` are set (as *named* arguments), in
          which case the entire range will be returned.
  
          This is so because any integer limit would be rather arbitrary and
          it's common to only want to fetch one message, but if a range is
          specified it makes sense that it should return the entirety of it.
  
          If `ids` is present in the *named* arguments and is not a list,
          a single `Message <telethon.tl.custom.message.Message>` will be
          returned for convenience instead of a list.
  
          Example
              .. code-block:: python
  
                  # Get 0 photos and print the total to show how many photos there are
                  from telethon.tl.types import InputMessagesFilterPhotos
                  photos = client.get_messages(chat, 0, filter=InputMessagesFilterPhotos)
                  print(photos.total)
  
                  # Get all the photos
                  photos = client.get_messages(chat, None, filter=InputMessagesFilterPhotos)
  
                  # Get messages by ID:
                  message_1337 = client.get_messages(chats, ids=1337)
          """
          if len(args) == 1 and 'limit' not in kwargs:
              if 'min_id' in kwargs and 'max_id' in kwargs:
                  kwargs['limit'] = None
              else:
                  kwargs['limit'] = 1
  
          it = self.iter_messages(*args, **kwargs)
  
          ids = kwargs.get('ids')
          if ids and not utils.is_list_like(ids):
              async for message in it:
                  return message
              else:
                  # Iterator exhausted = empty, to handle InputMessageReplyTo
                  return None
  
          return await it.collect()
  
      # endregion
  
      # region Message sending/editing/deleting
  
      async def send_message(
              self: 'TelegramClient',
              entity: 'hints.EntityLike',
              message: 'hints.MessageLike' = '',
              *,
              reply_to: 'typing.Union[int, types.Message]' = None,
              parse_mode: typing.Optional[str] = (),
              link_preview: bool = True,
              file: 'hints.FileLike' = None,
              force_document: bool = False,
              clear_draft: bool = False,
              buttons: 'hints.MarkupLike' = None,
              silent: bool = None) -> 'types.Message':
          """
          Sends a message to the specified user, chat or channel.
  
          The default parse mode is the same as the official applications
          (a custom flavour of markdown). ``**bold**, `code` or __italic__``
          are available. In addition you can send ``[links](https://example.com)``
          and ``[mentions](@username)`` (or using IDs like in the Bot API:
          ``[mention](tg://user?id=123456789)``) and ``pre`` blocks with three
          backticks.
  
          Sending a ``/start`` command with a parameter (like ``?start=data``)
          is also done through this method. Simply send ``'/start data'`` to
          the bot.
  
          See also `Message.respond() <telethon.tl.custom.message.Message.respond>`
          and `Message.reply() <telethon.tl.custom.message.Message.reply>`.
  
          Arguments
              entity (`entity`):
                  To who will it be sent.
  
              message (`str` | `Message <telethon.tl.custom.message.Message>`):
                  The message to be sent, or another message object to resend.
  
                  The maximum length for a message is 35,000 bytes or 4,096
                  characters. Longer messages will not be sliced automatically,
                  and you should slice them manually if the text to send is
                  longer than said length.
  
              reply_to (`int` | `Message <telethon.tl.custom.message.Message>`, optional):
                  Whether to reply to a message or not. If an integer is provided,
                  it should be the ID of the message that it should reply to.
  
              parse_mode (`object`, optional):
                  See the `TelegramClient.parse_mode
                  <telethon.client.messageparse.MessageParseMethods.parse_mode>`
                  property for allowed values. Markdown parsing will be used by
                  default.
  
              link_preview (`bool`, optional):
                  Should the link preview be shown?
  
              file (`file`, optional):
                  Sends a message with a file attached (e.g. a photo,
                  video, audio or document). The ``message`` may be empty.
  
              force_document (`bool`, optional):
                  Whether to send the given file as a document or not.
  
              clear_draft (`bool`, optional):
                  Whether the existing draft should be cleared or not.
                  Has no effect when sending a file.
  
              buttons (`list`, `custom.Button <telethon.tl.custom.button.Button>`, :tl:`KeyboardButton`):
                  The matrix (list of lists), row list or button to be shown
                  after sending the message. This parameter will only work if
                  you have signed in as a bot. You can also pass your own
                  :tl:`ReplyMarkup` here.
  
                  All the following limits apply together:
  
                  * There can be 100 buttons at most (any more are ignored).
                  * There can be 8 buttons per row at most (more are ignored).
                  * The maximum callback data per button is 64 bytes.
                  * The maximum data that can be embedded in total is just
                    over 4KB, shared between inline callback data and text.
  
              silent (`bool`, optional):
                  Whether the message should notify people in a broadcast
                  channel or not. Defaults to ``False``, which means it will
                  notify them. Set it to ``True`` to alter this behaviour.
  
          Returns
              The sent `custom.Message <telethon.tl.custom.message.Message>`.
  
          Example
              .. code-block:: python
  
                  # Markdown is the default
                  client.send_message('lonami', 'Thanks for the **Telethon** library!')
  
                  # Default to another parse mode
                  client.parse_mode = 'html'
  
                  client.send_message('me', 'Some <b>bold</b> and <i>italic</i> text')
                  client.send_message('me', 'An <a href="https://example.com">URL</a>')
                  # code and pre tags also work, but those break the documentation :)
                  client.send_message('me', '<a href="tg://user?id=me">Mentions</a>')
  
                  # Explicit parse mode
                  # No parse mode by default
                  client.parse_mode = None
  
                  # ...but here I want markdown
                  client.send_message('me', 'Hello, **world**!', parse_mode='md')
  
                  # ...and here I need HTML
                  client.send_message('me', 'Hello, <i>world</i>!', parse_mode='html')
  
                  # If you logged in as a bot account, you can send buttons
                  from telethon import events, Button
  
                  @client.on(events.CallbackQuery)
                  async def callback(event):
                      await event.edit('Thank you for clicking {}!'.format(event.data))
  
                  # Single inline button
                  client.send_message(chat, 'A single button, with "clk1" as data',
                                      buttons=Button.inline('Click me', b'clk1'))
  
                  # Matrix of inline buttons
                  client.send_message(chat, 'Pick one from this grid', buttons=[
                      [Button.inline('Left'), Button.inline('Right')],
                      [Button.url('Check this site!', 'https://lonamiwebs.github.io')]
                  ])
  
                  # Reply keyboard
                  client.send_message(chat, 'Welcome', buttons=[
                      Button.text('Thanks!', resize=True, single_use=True),
                      Button.request_phone('Send phone'),
                      Button.request_location('Send location')
                  ])
  
                  # Forcing replies or clearing buttons.
                  client.send_message(chat, 'Reply to me', buttons=Button.force_reply())
                  client.send_message(chat, 'Bye Keyboard!', buttons=Button.clear())
          """
          if file is not None:
              return await self.send_file(
                  entity, file, caption=message, reply_to=reply_to,
                  parse_mode=parse_mode, force_document=force_document,
                  buttons=buttons
              )
          elif not message:
              raise ValueError(
                  'The message cannot be empty unless a file is provided'
              )
  
          entity = await self.get_input_entity(entity)
          if isinstance(message, types.Message):
              if buttons is None:
                  markup = message.reply_markup
              else:
                  markup = self.build_reply_markup(buttons)
  
              if silent is None:
                  silent = message.silent
  
              if (message.media and not isinstance(
                      message.media, types.MessageMediaWebPage)):
                  return await self.send_file(
                      entity,
                      message.media,
                      caption=message.message,
                      silent=silent,
                      reply_to=reply_to,
                      buttons=markup,
                      entities=message.entities
                  )
  
              request = functions.messages.SendMessageRequest(
                  peer=entity,
                  message=message.message or '',
                  silent=silent,
                  reply_to_msg_id=utils.get_message_id(reply_to),
                  reply_markup=markup,
                  entities=message.entities,
                  clear_draft=clear_draft,
                  no_webpage=not isinstance(
                      message.media, types.MessageMediaWebPage)
              )
              message = message.message
          else:
              message, msg_ent = await self._parse_message_text(message,
                                                                parse_mode)
              request = functions.messages.SendMessageRequest(
                  peer=entity,
                  message=message,
                  entities=msg_ent,
                  no_webpage=not link_preview,
                  reply_to_msg_id=utils.get_message_id(reply_to),
                  clear_draft=clear_draft,
                  silent=silent,
                  reply_markup=self.build_reply_markup(buttons)
              )
  
          result = await self(request)
          if isinstance(result, types.UpdateShortSentMessage):
              message = types.Message(
                  id=result.id,
                  to_id=utils.get_peer(entity),
                  message=message,
                  date=result.date,
                  out=result.out,
                  media=result.media,
                  entities=result.entities,
                  reply_markup=request.reply_markup
              )
              message._finish_init(self, {}, entity)
              return message
  
          return self._get_response_message(request, result, entity)
  
      async def forward_messages(
              self: 'TelegramClient',
              entity: 'hints.EntityLike',
              messages: 'typing.Union[hints.MessageIDLike, typing.Sequence[hints.MessageIDLike]]',
              from_peer: 'hints.EntityLike' = None,
              *,
              silent: bool = None,
              as_album: bool = None) -> 'typing.Sequence[types.Message]':
          """
          Forwards the given messages to the specified entity.
  
          If you want to "forward" a message without the forward header
          (the "forwarded from" text), you should use `send_message` with
          the original message instead. This will send a copy of it.
  
          See also `Message.forward_to() <telethon.tl.custom.message.Message.forward_to>`.
  
          Arguments
              entity (`entity`):
                  To which entity the message(s) will be forwarded.
  
              messages (`list` | `int` | `Message <telethon.tl.custom.message.Message>`):
                  The message(s) to forward, or their integer IDs.
  
              from_peer (`entity`):
                  If the given messages are integer IDs and not instances
                  of the ``Message`` class, this *must* be specified in
                  order for the forward to work. This parameter indicates
                  the entity from which the messages should be forwarded.
  
              silent (`bool`, optional):
                  Whether the message should notify people in a broadcast
                  channel or not. Defaults to ``False``, which means it will
                  notify them. Set it to ``True`` to alter this behaviour.
  
              as_album (`bool`, optional):
                  Whether several image messages should be forwarded as an
                  album (grouped) or not. The default behaviour is to treat
                  albums specially and send outgoing requests with
                  ``as_album=True`` only for the albums if message objects
                  are used. If IDs are used it will group by default.
  
                  In short, the default should do what you expect,
                  ``True`` will group always (even converting separate
                  images into albums), and ``False`` will never group.
  
          Returns
              The list of forwarded `telethon.tl.custom.message.Message`,
              or a single one if a list wasn't provided as input.
  
              Note that if all messages are invalid (i.e. deleted) the call
              will fail with ``MessageIdInvalidError``. If only some are
              invalid, the list will have ``None`` instead of those messages.
  
          Example
              .. code-block:: python
  
                  # a single one
                  client.forward_messages(chat, message)
                  # or
                  client.forward_messages(chat, message_id, from_chat)
                  # or
                  message.forward_to(chat)
  
                  # multiple
                  client.forward_messages(chat, messages)
                  # or
                  client.forward_messages(chat, message_ids, from_chat)
  
                  # Forwarding as a copy
                  client.send_message(chat, message)
          """
          single = not utils.is_list_like(messages)
          if single:
              messages = (messages,)
  
          entity = await self.get_input_entity(entity)
  
          if from_peer:
              from_peer = await self.get_input_entity(from_peer)
              from_peer_id = await self.get_peer_id(from_peer)
          else:
              from_peer_id = None
  
          def _get_key(m):
              if isinstance(m, int):
                  if from_peer_id is not None:
                      return from_peer_id, None
  
                  raise ValueError('from_peer must be given if integer IDs are used')
              elif isinstance(m, types.Message):
                  return m.chat_id, m.grouped_id
              else:
                  raise TypeError('Cannot forward messages of type {}'.format(type(m)))
  
          # We want to group outgoing chunks differently if we are "smart"
          # about sending as album.
          #
          # Why? We need separate requests for ``as_album=True/False``, so
          # if we want that behaviour, when we group messages to create the
          # chunks, we need to consider the grouped ID too. But if we don't
          # care about that, we don't need to consider it for creating the
          # chunks, so we can make less requests.
          if as_album is None:
              get_key = _get_key
          else:
              def get_key(m):
                  return _get_key(m)[0]  # Ignore grouped_id
  
          sent = []
          for chat_id, chunk in itertools.groupby(messages, key=get_key):
              chunk = list(chunk)
              if isinstance(chunk[0], int):
                  chat = from_peer
                  grouped = True if as_album is None else as_album
              else:
                  chat = await chunk[0].get_input_chat()
                  if as_album is None:
                      grouped = any(m.grouped_id is not None for m in chunk)
                  else:
                      grouped = as_album
  
                  chunk = [m.id for m in chunk]
  
              req = functions.messages.ForwardMessagesRequest(
                  from_peer=chat,
                  id=chunk,
                  to_peer=entity,
                  silent=silent,
                  # Trying to send a single message as grouped will cause
                  # GROUPED_MEDIA_INVALID. If more than one message is forwarded
                  # (even without media...), this error goes away.
                  grouped=len(chunk) > 1 and grouped
              )
              result = await self(req)
              sent.extend(self._get_response_message(req, result, entity))
  
          return sent[0] if single else sent
  
      async def edit_message(
              self: 'TelegramClient',
              entity: 'typing.Union[hints.EntityLike, types.Message]',
              message: 'hints.MessageLike' = None,
              text: str = None,
              *,
              parse_mode: str = (),
              link_preview: bool = True,
              file: 'hints.FileLike' = None,
              buttons: 'hints.MarkupLike' = None) -> 'types.Message':
          """
          Edits the given message to change its text or media.
  
          See also `Message.edit() <telethon.tl.custom.message.Message.edit>`.
  
          Arguments
              entity (`entity` | `Message <telethon.tl.custom.message.Message>`):
                  From which chat to edit the message. This can also be
                  the message to be edited, and the entity will be inferred
                  from it, so the next parameter will be assumed to be the
                  message text.
  
                  You may also pass a :tl:`InputBotInlineMessageID`,
                  which is the only way to edit messages that were sent
                  after the user selects an inline query result.
  
              message (`int` | `Message <telethon.tl.custom.message.Message>` | `str`):
                  The ID of the message (or `Message
                  <telethon.tl.custom.message.Message>` itself) to be edited.
                  If the `entity` was a `Message
                  <telethon.tl.custom.message.Message>`, then this message
                  will be treated as the new text.
  
              text (`str`, optional):
                  The new text of the message. Does nothing if the `entity`
                  was a `Message <telethon.tl.custom.message.Message>`.
  
              parse_mode (`object`, optional):
                  See the `TelegramClient.parse_mode
                  <telethon.client.messageparse.MessageParseMethods.parse_mode>`
                  property for allowed values. Markdown parsing will be used by
                  default.
  
              link_preview (`bool`, optional):
                  Should the link preview be shown?
  
              file (`str` | `bytes` | `file` | `media`, optional):
                  The file object that should replace the existing media
                  in the message.
  
              buttons (`list`, `custom.Button <telethon.tl.custom.button.Button>`, :tl:`KeyboardButton`):
                  The matrix (list of lists), row list or button to be shown
                  after sending the message. This parameter will only work if
                  you have signed in as a bot. You can also pass your own
                  :tl:`ReplyMarkup` here.
  
          Returns
              The edited `telethon.tl.custom.message.Message`, unless
              `entity` was a :tl:`InputBotInlineMessageID` in which
              case this method returns a boolean.
  
          Raises
              ``MessageAuthorRequiredError`` if you're not the author of the
              message but tried editing it anyway.
  
              ``MessageNotModifiedError`` if the contents of the message were
              not modified at all.
  
          Example
              .. code-block:: python
  
                  message = client.send_message(chat, 'hello')
  
                  client.edit_message(chat, message, 'hello!')
                  # or
                  client.edit_message(chat, message.id, 'hello!!')
                  # or
                  client.edit_message(message, 'hello!!!')
          """
          if isinstance(entity, types.InputBotInlineMessageID):
              text = message
              message = entity
          elif isinstance(entity, types.Message):
              text = message  # Shift the parameters to the right
              message = entity
              entity = entity.to_id
  
          text, msg_entities = await self._parse_message_text(text, parse_mode)
          file_handle, media, image = await self._file_to_media(file)
  
          if isinstance(entity, types.InputBotInlineMessageID):
              return await self(functions.messages.EditInlineBotMessageRequest(
                  id=entity,
                  message=text,
                  no_webpage=not link_preview,
                  entities=msg_entities,
                  media=media,
                  reply_markup=self.build_reply_markup(buttons)
              ))
  
          entity = await self.get_input_entity(entity)
          request = functions.messages.EditMessageRequest(
              peer=entity,
              id=utils.get_message_id(message),
              message=text,
              no_webpage=not link_preview,
              entities=msg_entities,
              media=media,
              reply_markup=self.build_reply_markup(buttons)
          )
          msg = self._get_response_message(request, await self(request), entity)
          await self._cache_media(msg, file, file_handle, image=image)
          return msg
  
      async def delete_messages(
              self: 'TelegramClient',
              entity: 'hints.EntityLike',
              message_ids: 'typing.Union[hints.MessageIDLike, typing.Sequence[hints.MessageIDLike]]',
              *,
              revoke: bool = True) -> 'typing.Sequence[types.messages.AffectedMessages]':
          """
          Deletes the given messages, optionally "for everyone".
  
          See also `Message.delete() <telethon.tl.custom.message.Message.delete>`.
  
          .. warning::
  
              This method does **not** validate that the message IDs belong
              to the chat that you passed! It's possible for the method to
              delete messages from different private chats and small group
              chats at once, so make sure to pass the right IDs.
  
          Arguments
              entity (`entity`):
                  From who the message will be deleted. This can actually
                  be ``None`` for normal chats, but **must** be present
                  for channels and megagroups.
  
              message_ids (`list` | `int` | `Message <telethon.tl.custom.message.Message>`):
                  The IDs (or ID) or messages to be deleted.
  
              revoke (`bool`, optional):
                  Whether the message should be deleted for everyone or not.
                  By default it has the opposite behaviour of official clients,
                  and it will delete the message for everyone.
  
                  `Since 24 March 2019
                  <https://telegram.org/blog/unsend-privacy-emoji>`_, you can
                  also revoke messages of any age (i.e. messages sent long in
                  the past) the *other* person sent in private conversations
                  (and of course your messages too).
  
                  Disabling this has no effect on channels or megagroups,
                  since it will unconditionally delete the message for everyone.
  
          Returns
              A list of :tl:`AffectedMessages`, each item being the result
              for the delete calls of the messages in chunks of 100 each.
  
          Example
              .. code-block:: python
  
                  client.delete_messages(chat, messages)
          """
          if not utils.is_list_like(message_ids):
              message_ids = (message_ids,)
  
          message_ids = (
              m.id if isinstance(m, (
                  types.Message, types.MessageService, types.MessageEmpty))
              else int(m) for m in message_ids
          )
  
          entity = await self.get_input_entity(entity) if entity else None
          if isinstance(entity, types.InputPeerChannel):
              return await self([functions.channels.DeleteMessagesRequest(
                           entity, list(c)) for c in utils.chunks(message_ids)])
          else:
              return await self([functions.messages.DeleteMessagesRequest(
                           list(c), revoke) for c in utils.chunks(message_ids)])
  
      # endregion
  
      # region Miscellaneous
  
      async def send_read_acknowledge(
              self: 'TelegramClient',
              entity: 'hints.EntityLike',
              message: 'typing.Union[hints.MessageIDLike, typing.Sequence[hints.MessageIDLike]]' = None,
              *,
              max_id: int = None,
              clear_mentions: bool = False) -> bool:
          """
          Marks messages as read and optionally clears mentions.
  
          This effectively marks a message as read (or more than one) in the
          given conversation.
  
          If neither message nor maximum ID are provided, all messages will be
          marked as read by assuming that ``max_id = 0``.
  
          Arguments
              entity (`entity`):
                  The chat where these messages are located.
  
              message (`list` | `Message <telethon.tl.custom.message.Message>`):
                  Either a list of messages or a single message.
  
              max_id (`int`):
                  Overrides messages, until which message should the
                  acknowledge should be sent.
  
              clear_mentions (`bool`):
                  Whether the mention badge should be cleared (so that
                  there are no more mentions) or not for the given entity.
  
                  If no message is provided, this will be the only action
                  taken.
  
          Example
              .. code-block:: python
  
                  client.send_read_acknowledge(last_message)
                  # or
                  client.send_read_acknowledge(last_message_id)
                  # or
                  client.send_read_acknowledge(messages)
          """
          if max_id is None:
              if not message:
                  max_id = 0
              else:
                  if utils.is_list_like(message):
                      max_id = max(msg.id for msg in message)
                  else:
                      max_id = message.id
  
          entity = await self.get_input_entity(entity)
          if clear_mentions:
              await self(functions.messages.ReadMentionsRequest(entity))
              if max_id is None:
                  return True
  
          if max_id is not None:
              if isinstance(entity, types.InputPeerChannel):
                  return await self(functions.channels.ReadHistoryRequest(
                      utils.get_input_channel(entity), max_id=max_id))
              else:
                  return await self(functions.messages.ReadHistoryRequest(
                      entity, max_id=max_id))
  
          return False
  
      async def pin_message(
              self: 'TelegramClient',
              entity: 'hints.EntityLike',
              message: 'typing.Optional[hints.MessageIDLike]',
              *,
              notify: bool = False
      ):
          """
          Pins or unpins a message in a chat.
  
          The default behaviour is to *not* notify members, unlike the
          official applications.
  
          See also `Message.pin() <telethon.tl.custom.message.Message.pin>`.
  
          Arguments
              entity (`entity`):
                  The chat where the message should be pinned.
  
              message (`int` | `Message <telethon.tl.custom.message.Message>`):
                  The message or the message ID to pin. If it's
                  ``None``, the message will be unpinned instead.
  
              notify (`bool`, optional):
                  Whether the pin should notify people or not.
  
          Example
              .. code-block:: python
  
                  # Send and pin a message to annoy everyone
                  message = client.send_message(chat, 'Pinotifying is fun!')
                  client.pin_message(chat, message, notify=True)
          """
          if not message:
              message = 0
  
          entity = await self.get_input_entity(entity)
          await self(functions.messages.UpdatePinnedMessageRequest(
              peer=entity,
              id=message,
              silent=not notify
          ))
  
      # endregion
  
      # endregion
  