text: import asyncio
  import html
  import logging
  from typing import Dict
  from typing import List
  from typing import Optional
  
  from irc.modes import parse_channel_modes
  
  from heisenbridge.command_parse import CommandParser
  from heisenbridge.private_room import parse_irc_formatting
  from heisenbridge.private_room import PrivateRoom
  from heisenbridge.private_room import unix_to_local
  
  
  class NetworkRoom:
      pass
  
  
  class ChannelRoom(PrivateRoom):
      key: Optional[str]
      member_sync: str
      autocmd: str
      names_buffer: List[str]
      bans_buffer: List[str]
      on_channel: List[str]
  
      def init(self) -> None:
          super().init()
  
          self.key = None
          self.autocmd = None
  
          # for migration the class default is full
          self.member_sync = "full"
  
          cmd = CommandParser(
              prog="AUTOCMD",
              description="run commands on join",
              epilog=(
                  "Works _exactly_ like network AUTOCMD and runs in the network context."
                  " You can use this to login to bots or other services after joining a channel."
              ),
          )
          cmd.add_argument("command", nargs="*", help="commands separated with ';'")
          cmd.add_argument("--remove", action="store_true", help="remove stored command")
          self.commands.register(cmd, self.cmd_autocmd)
  
          cmd = CommandParser(
              prog="SYNC",
              description="override IRC member sync type for this room",
              epilog="Note: To force full sync after setting to full, use the NAMES command",
          )
          group = cmd.add_mutually_exclusive_group()
          group.add_argument("--lazy", help="set lazy sync, members are added when they talk", action="store_true")
          group.add_argument(
              "--half", help="set half sync, members are added when they join or talk", action="store_true"
          )
          group.add_argument("--full", help="set full sync, members are fully synchronized", action="store_true")
          group.add_argument(
              "--off",
              help="disable member sync completely, the bridge will relay all messages, may be useful during spam attacks",
              action="store_true",
          )
          self.commands.register(cmd, self.cmd_sync)
  
          cmd = CommandParser(
              prog="MODE",
              description="send MODE command",
              epilog=(
                  "Can be used to change channel modes, ban lists or invoke/manage custom lists.\n"
                  "It is very network specific what modes or lists are supported, please see their documentation"
                  " for comprehensive help.\n"
                  "\n"
                  "Note: Some common modes and lists may have a command, see HELP.\n"
              ),
          )
          cmd.add_argument("args", nargs="*", help="MODE command arguments")
          self.commands.register(cmd, self.cmd_mode)
  
          cmd = CommandParser(
              prog="NAMES",
              description="list channel members",
              epilog=(
                  "Sends a NAMES command to server.\n"
                  "\n"
                  "This can be used to see what IRC permissions users currently have on this channel.\n"
                  "\n"
                  "Note: In addition this will resynchronize the Matrix room members list and may cause joins/leaves"
                  " if it has fallen out of sync.\n"
              ),
          )
          self.commands.register(cmd, self.cmd_names)
  
          # plumbs have a slightly adjusted version
          if type(self) == ChannelRoom:
              cmd = CommandParser(prog="TOPIC", description="show or set channel topic")
              cmd.add_argument("text", nargs="*", help="topic text if setting")
              self.commands.register(cmd, self.cmd_topic)
  
          cmd = CommandParser(prog="BANS", description="show channel ban list")
          self.commands.register(cmd, self.cmd_bans)
  
          cmd = CommandParser(prog="OP", description="op someone")
          cmd.add_argument("nick", help="nick to target")
          self.commands.register(cmd, self.cmd_op)
  
          cmd = CommandParser(prog="DEOP", description="deop someone")
          cmd.add_argument("nick", help="nick to target")
          self.commands.register(cmd, self.cmd_deop)
  
          cmd = CommandParser(prog="VOICE", description="voice someone")
          cmd.add_argument("nick", help="nick to target")
          self.commands.register(cmd, self.cmd_voice)
  
          cmd = CommandParser(prog="DEVOICE", description="devoice someone")
          cmd.add_argument("nick", help="nick to target")
          self.commands.register(cmd, self.cmd_devoice)
  
          cmd = CommandParser(prog="KICK", description="kick someone")
          cmd.add_argument("nick", help="nick to target")
          cmd.add_argument("reason", nargs="*", help="reason")
          self.commands.register(cmd, self.cmd_kick)
  
          cmd = CommandParser(prog="KB", description="kick and ban someone")
          cmd.add_argument("nick", help="nick to target")
          cmd.add_argument("reason", nargs="*", help="reason")
          self.commands.register(cmd, self.cmd_kb)
  
          cmd = CommandParser(prog="JOIN", description="join this channel if not on it")
          self.commands.register(cmd, self.cmd_join)
  
          cmd = CommandParser(prog="PART", description="leave this channel temporarily")
          self.commands.register(cmd, self.cmd_part)
  
          cmd = CommandParser(
              prog="STOP",
              description="immediately clear all queued IRC events like long messages",
              epilog="Use this to stop accidental long pastes, also known as STAHP!",
          )
          self.commands.register(cmd, self.cmd_stop, ["STOP!", "STAHP", "STAHP!"])
  
          self.names_buffer = []
          self.bans_buffer = []
          self.on_channel = []
  
      def from_config(self, config: dict) -> None:
          super().from_config(config)
  
          if "key" in config:
              self.key = config["key"]
  
          if "member_sync" in config:
              self.member_sync = config["member_sync"]
  
          if "autocmd" in config:
              self.autocmd = config["autocmd"]
  
          # initialize lazy members dict if sync is not off
          if self.member_sync != "off":
              if self.lazy_members is None:
                  self.lazy_members = {}
          else:
              self.lazy_members = None
  
      def to_config(self) -> dict:
          return {**(super().to_config()), "key": self.key, "member_sync": self.member_sync, "autocmd": self.autocmd}
  
      @staticmethod
      def create(network: NetworkRoom, name: str) -> "ChannelRoom":
          logging.debug(f"ChannelRoom.create(network='{network.name}', name='{name}'")
  
          room = ChannelRoom(None, network.user_id, network.serv, [network.serv.user_id, network.user_id], [])
          room.name = name.lower()
          room.network = network
          room.network_id = network.id
          room.network_name = network.name
  
          # fetch stored channel key if used for join command
          if room.name in network.keys:
              room.key = network.keys[room.name]
              del network.keys[room.name]
  
          # stamp global member sync setting at room creation time
          room.member_sync = network.serv.config["member_sync"]
  
          asyncio.ensure_future(room._create_mx(name))
          return room
  
      async def _create_mx(self, name):
          # handle !room names properly
          visible_name = name
          if visible_name.startswith("!"):
              visible_name = "!" + visible_name[6:]
  
          self.id = await self.network.serv.create_room(
              f"{visible_name} ({self.network.name})",
              "",
              [self.network.user_id],
          )
          self.serv.register_room(self)
          await self.save()
          # start event queue now that we have an id
          self._queue.start()
  
          # attach to network space
          if self.network.space:
              await self.network.space.attach(self.id)
  
      def is_valid(self) -> bool:
          if not self.in_room(self.user_id):
              return False
  
          return super().is_valid()
  
      def cleanup(self) -> None:
          if self.network:
              if self.network.conn and self.network.conn.connected:
                  self.network.conn.part(self.name)
  
          super().cleanup()
  
      async def cmd_autocmd(self, args) -> None:
          autocmd = " ".join(args.command)
  
          if args.remove:
              self.autocmd = None
              await self.save()
              self.send_notice("Autocmd removed.", forward=args._forward)
              return
  
          if autocmd == "":
              self.send_notice(f"Configured autocmd: {self.autocmd if self.autocmd else ''}", forward=args._forward)
              return
  
          self.autocmd = autocmd
          await self.save()
          self.send_notice(f"Autocmd set to {self.autocmd}", forward=args._forward)
  
      async def cmd_sync(self, args):
          if args.lazy:
              self.member_sync = "lazy"
              await self.save()
          elif args.half:
              self.member_sync = "half"
              await self.save()
          elif args.full:
              self.member_sync = "full"
              await self.save()
          elif args.off:
              self.member_sync = "off"
              # prevent anyone already in lazy list to be invited
              self.lazy_members = None
              await self.save()
  
          self.send_notice(f"Member sync is set to {self.member_sync}", forward=args._forward)
  
      async def cmd_mode(self, args) -> None:
          self.network.conn.mode(self.name, " ".join(args.args))
  
      async def cmd_modes(self, args) -> None:
          self.network.conn.mode(self.name, "")
  
      async def cmd_names(self, args) -> None:
          self.network.conn.names(self.name)
  
      async def cmd_bans(self, args) -> None:
          self.network.conn.mode(self.name, "+b")
  
      async def cmd_op(self, args) -> None:
          self.network.conn.mode(self.name, f"+o {args.nick}")
  
      async def cmd_deop(self, args) -> None:
          self.network.conn.mode(self.name, f"-o {args.nick}")
  
      async def cmd_voice(self, args) -> None:
          self.network.conn.mode(self.name, f"+v {args.nick}")
  
      async def cmd_devoice(self, args) -> None:
          self.network.conn.mode(self.name, f"-v {args.nick}")
  
      async def cmd_topic(self, args) -> None:
          self.network.conn.topic(self.name, " ".join(args.text))
  
      async def cmd_kick(self, args) -> None:
          self.network.conn.kick(self.name, args.nick, " ".join(args.reason))
  
      async def cmd_kb(self, args) -> None:
          self.network.kickban(self.name, args.nick, " ".join(args.reason))
  
      async def cmd_join(self, args) -> None:
          self.network.conn.join(self.name, self.key)
  
      async def cmd_part(self, args) -> None:
          self.network.conn.part(self.name)
  
      async def cmd_stop(self, args) -> None:
          filtered = self.network.conn.remove_tag(self.name)
          self.send_notice(f"{filtered} messages removed from queue.")
  
      def on_pubmsg(self, conn, event):
          self.on_privmsg(conn, event)
  
      def on_pubnotice(self, conn, event):
          self.on_privnotice(conn, event)
  
      def on_namreply(self, conn, event) -> None:
          self.names_buffer.extend(event.arguments[2].split())
  
      def _add_puppet(self, nick):
          irc_user_id = self.serv.irc_user_id(self.network.name, nick)
  
          self.ensure_irc_user_id(self.network.name, nick)
          self.join(irc_user_id, nick)
  
      def _remove_puppet(self, user_id, reason=None):
          if user_id == self.serv.user_id or user_id == self.user_id:
              return
  
          self.leave(user_id, reason)
  
      def on_endofnames(self, conn, event) -> None:
          to_remove = []
          to_add = []
          names = list(self.names_buffer)
          self.names_buffer = []
          modes: Dict[str, List[str]] = {}
          others = []
          on_channel = []
  
          # always reset lazy list because it can be toggled on-the-fly
          self.lazy_members = {} if self.member_sync != "off" else None
  
          # build to_remove list from our own puppets
          for member in self.members:
              (name, server) = member.split(":", 1)
  
              if name.startswith("@" + self.serv.puppet_prefix) and server == self.serv.server_name:
                  to_remove.append(member)
  
          for nick in names:
              nick, mode = self.serv.strip_nick(nick)
              on_channel.append(nick.lower())
  
              if mode:
                  if mode not in modes:
                      modes[mode] = []
  
                  if nick == conn.real_nickname:
                      modes[mode].append(nick + " (you)")
                  else:
                      modes[mode].append(nick)
              else:
                  if nick == conn.real_nickname:
                      others.append(nick + " (you)")
                  else:
                      others.append(nick)
  
              # convert to mx id, check if we already have them
              irc_user_id = self.serv.irc_user_id(self.network.name, nick)
  
              # make sure this user is not removed from room
              if irc_user_id in to_remove:
                  to_remove.remove(irc_user_id)
                  continue
  
              # ignore adding us here, only lazy join on echo allowed
              if nick == conn.real_nickname:
                  continue
  
              # if this user is not in room, add to invite list
              if not self.in_room(irc_user_id):
                  to_add.append((irc_user_id, nick))
  
              # always put everyone in the room to lazy list if we have any member sync
              if self.lazy_members is not None:
                  self.lazy_members[irc_user_id] = nick
  
          # never remove us or appservice
          if self.serv.user_id in to_remove:
              to_remove.remove(self.serv.user_id)
          if self.user_id in to_remove:
              to_remove.remove(self.user_id)
  
          self.send_notice(
              "Synchronizing members:"
              + f" got {len(names)} from server,"
              + f" {len(self.members)} in room,"
              + f" {len(to_add)} will be invited and {len(to_remove)} removed."
          )
  
          # known common mode names
          modenames = {
              "~": "owner",
              "&": "admin",
              "@": "op",
              "%": "half-op",
              "+": "voice",
          }
  
          # show modes from top to bottom
          for mode, name in modenames.items():
              if mode in modes:
                  nicks = sorted(modes[mode], key=str.casefold)
                  self.send_notice(f"Users with {name} ({mode}): {', '.join(nicks)}")
                  del modes[mode]
  
          # show unknown modes
          for mode, nicks in modes.items():
              nicks = sorted(nicks, key=str.casefold)
              self.send_notice(f"Users with '{mode}': {', '.join(nicks)}")
  
          # show everyone else
          if len(others) > 0:
              others = sorted(others, key=str.casefold)
              self.send_notice(f"Users: {', '.join(others)}")
  
          if self.member_sync == "full":
              for (irc_user_id, nick) in to_add:
                  self._add_puppet(nick)
          else:
              self.send_notice(f"Member sync is set to {self.member_sync}, skipping invites.")
  
          for irc_user_id in to_remove:
              self._remove_puppet(irc_user_id)
  
          # trust the names reply is always up-to-date
          self.on_channel = on_channel
  
      def is_on_channel(self, nick):
          return nick.lower() in self.on_channel
  
      def channel_join(self, nick):
          nick = nick.lower()
          if nick not in self.on_channel:
              self.on_channel.append(nick)
  
      def channel_leave(self, nick):
          nick = nick.lower()
          if nick in self.on_channel:
              self.on_channel.remove(nick)
  
      def on_join(self, conn, event) -> None:
          self.channel_join(event.source.nick)
  
          # we don't need to sync ourself
          if conn.real_nickname == event.source.nick:
              self.send_notice(f"Joined {event.target} as {event.source.nick} ({event.source.userhost})")
  
              # sync channel modes/key on join
              self.network.conn.mode(self.name, "")
  
              # send autocmd if we have one
              if self.autocmd:
  
                  async def autocmd(self):
                      self.send_notice("Executing channel autocmd.")
                      try:
                          await self.network.commands.trigger(
                              self.autocmd, allowed=["RAW", "MSG", "NICKSERV", "NS", "CHANSERV", "CS", "WAIT"]
                          )
                      except Exception as e:
                          self.send_notice(f"Channel autocmd failed: {str(e)}")
  
                  asyncio.ensure_future(autocmd(self))
  
              return
  
          # ensure, append, invite and join
          if self.member_sync == "full" or self.member_sync == "half":
              self._add_puppet(event.source.nick)
          elif self.member_sync != "off":
              irc_user_id = self.serv.irc_user_id(self.network.name, event.source.nick)
              self.join(irc_user_id, event.source.nick, lazy=True)
  
      def on_part(self, conn, event) -> None:
          self.channel_leave(event.source.nick)
  
          # we don't need to sync ourself
          if conn.real_nickname == event.source.nick:
              # immediately dequeue all future events
              conn.remove_tag(event.target.lower())
  
              self.send_notice_html(
                  f"You left the channel. To rejoin, type <b>JOIN {event.target}</b> in the <b>{self.network.name}</b> network room."
              )
              self.send_notice_html("If you want to permanently leave you need to leave this room.")
              return
  
          irc_user_id = self.serv.irc_user_id(self.network.name, event.source.nick)
          self._remove_puppet(irc_user_id, event.arguments[0] if len(event.arguments) else None)
  
      def on_quit(self, conn, event) -> None:
          self.channel_leave(event.source.nick)
          irc_user_id = self.serv.irc_user_id(self.network.name, event.source.nick)
          self._remove_puppet(irc_user_id, f"Quit: {event.arguments[0]}")
  
      def update_key(self, modes):
          for sign, key, value in parse_channel_modes(" ".join(modes)):
              # update channel key
              if key == "k":
                  value = None if sign == "-" else value
                  if value != self.key:
                      self.key = value
                      if self.id is not None:
                          asyncio.ensure_future(self.save())
  
      def on_badchannelkey(self, conn, event) -> None:
          self.send_notice(event.arguments[1] if len(event.arguments) > 1 else "Incorrect channel key, join failed.")
          self.send_notice_html(
              f"Use <b>JOIN {html.escape(event.arguments[0])} &lt;key&gt;</b> in the network room to rejoin this channel."
          )
  
      def on_chanoprivsneeded(self, conn, event) -> None:
          self.send_notice(event.arguments[1] if len(event.arguments) > 1 else "You're not operator.")
  
      def on_cannotsendtochan(self, conn, event) -> None:
          self.send_notice(event.arguments[1] if len(event.arguments) > 1 else "Cannot send to channel.")
  
      def on_mode(self, conn, event) -> None:
          modes = list(event.arguments)
  
          self.send_notice("{} set modes {}".format(event.source.nick, " ".join(modes)))
          self.update_key(modes)
  
      def on_notopic(self, conn, event) -> None:
          self.send_notice(event.arguments[1] if len(event.arguments) > 1 else "No topic is set.")
          self.set_topic("")
  
      def on_currenttopic(self, conn, event) -> None:
          (plain, formatted) = parse_irc_formatting(event.arguments[1])
          self.send_notice(f"Topic is '{plain}'")
          self.set_topic(plain)
  
      def on_topicinfo(self, conn, event) -> None:
          settime = unix_to_local(event.arguments[2]) if len(event.arguments) > 2 else "?"
          (plain, formatted) = parse_irc_formatting(event.arguments[1])
          self.send_notice(f"Topic set by {plain} at {settime}")
  
      def on_topic(self, conn, event) -> None:
          self.send_notice("{} changed the topic".format(event.source.nick))
          (plain, formatted) = parse_irc_formatting(event.arguments[0])
          self.set_topic(plain)
  
      def on_kick(self, conn, event) -> None:
          self.channel_leave(event.arguments[0])
  
          reason = (": " + event.arguments[1]) if len(event.arguments) > 1 and len(event.arguments[1]) > 0 else ""
  
          if event.arguments[0] == conn.real_nickname:
              # immediately dequeue all future events
              conn.remove_tag(event.target.lower())
  
              self.send_notice_html(f"You were kicked from the channel by <b>{event.source.nick}</b>{reason}")
              if self.network.rejoin_kick:
                  self.send_notice("Rejoin on kick is enabled, trying to join back immediately...")
                  conn.join(event.target)
              else:
                  self.send_notice_html(
                      f"To rejoin the channel, type <b>JOIN {event.target}</b> in the <b>{self.network.name}</b> network room."
                  )
          else:
              target_user_id = self.serv.irc_user_id(self.network.name, event.arguments[0])
              self.kick(target_user_id, f"Kicked by {event.source.nick}{reason}")
  
      def on_banlist(self, conn, event) -> None:
          parts = list(event.arguments)
          parts.pop(0)
          self.bans_buffer.append(parts)
  
      def on_endofbanlist(self, conn, event) -> None:
          bans = self.bans_buffer
          self.bans_buffer = []
  
          self.send_notice("Current channel bans:")
          for ban in bans:
              strban = f"\t{ban[0]}"
  
              # all other argumenta are optional
              if len(ban) > 1:
                  strban += f" set by {ban[1]}"
              if len(ban) > 2:
                  strban += f" at {unix_to_local(ban[2])}"
  
              self.send_notice(strban)
  
      def on_channelmodeis(self, conn, event) -> None:
          modes = list(event.arguments)
          modes.pop(0)
  
          self.send_notice(f"Current channel modes: {' '.join(modes)}")
  
      def on_channelcreate(self, conn, event) -> None:
          created = unix_to_local(event.arguments[1])
          self.send_notice(f"Channel was created at {created}")
  
      def on_328(self, conn, event) -> None:
          (plain, formatted) = parse_irc_formatting(event.arguments[1])
          self.send_notice(f"URL for {event.arguments[0]}: {plain}")
  