from logging import WARN
from typing import Dict

from paircd.client import Client
from paircd.command_handler import CommandHandler
from paircd.log import log_client
from paircd.message import Message
from paircd.server import Server

from paircd.handler.join import JoinHandler
from paircd.handler.nick import NickHandler
from paircd.handler.privmsg import PrivmsgHandler
from paircd.handler.user import UserHandler

HANDLER_CLASSES = [
    JoinHandler,
    NickHandler,
    PrivmsgHandler,
    UserHandler,
]

CMD_HANDLERS: Dict[str, CommandHandler] = {}


def register_cmd_handlers() -> None:
    for handler_cls in HANDLER_CLASSES:
        handler = handler_cls()  # type: ignore
        CMD_HANDLERS[handler.cmd] = handler


async def handle_cmd(server: Server, client: Client, msg: Message) -> None:
    if msg.cmd not in CMD_HANDLERS:
        log_client(client, f"used unknown command {msg.cmd}", level=WARN)
        return
    await CMD_HANDLERS[msg.cmd].handle(server, client, msg)