from asyncio import create_task
import logging

from paircd.channel import Channel
from paircd.client import Client
from paircd.message import Message
from paircd.server import Server


async def handle_join(server: Server, client: Client, msg: Message) -> None:
    channel_name = msg.args[0]
    if not client.registered:
        raise RuntimeError("JOIN: not registered")

    if not channel_name.startswith("#"):
        raise RuntimeError("invalid channel name")

    channel = server.get_channel_by_name(channel_name)
    channel.add_client(client)

    client.channels.add(channel_name)
    logging.info(f"{client.hostname} ({client.id()}) joined {channel_name}")

    await channel.msg_queue.put(
        Message(cmd="JOIN", args=[channel_name], prefix=client.id()).encode()
    )