from paircd.client import Client
from paircd.command_handler import CommandHandler
from paircd.message import Message
from paircd.reply import (
    ERR_NOSUCHNICK,
    ERR_NOTEXTTOSEND,
    PRIVMSG,
    RPL_AWAY,
)
from paircd.server import Server


class PrivmsgHandler(CommandHandler):
    def __init__(self) -> None:
        super().__init__("PRIVMSG", 2)

    async def handle(self, server: Server, client: Client, msg: Message) -> None:
        recipient, raw_msg = msg.args
        if len(raw_msg) == 0:
            client.write_message(ERR_NOTEXTTOSEND(client.nickname))
            return

        out = PRIVMSG(recipient, raw_msg, prefix=client.id())

        # Directly message a user
        if recipient in server.clients_by_nick:
            other_client = server.clients_by_nick[recipient]
            if other_client.away:
                client.write_message(
                    RPL_AWAY(client.nickname, recipient, other_client.away)
                )
            other_client.write_message(out)
            return

        # Broadcast to channel
        if recipient in server.channels_by_name:
            server.channels_by_name[recipient].write_message(out)
            return

        client.write_message(ERR_NOSUCHNICK(client.nickname, recipient))