from paircd.client import Client
from paircd.command_handler import CommandHandler
from paircd.message import Message
from paircd.reply import (
    ERR_NOSUCHNICK,
    ERR_NOTEXTTOSEND,
    ERR_NOTREGISTERED,
    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())
        for name, other_client in server.clients_by_nick.items():
            if name == recipient:
                if other_client.away:
                    client.write_message(
                        RPL_AWAY(client.nickname, name, other_client.away)
                    )
                other_client.write_message(out)
                return

        for name, channel in server.channels_by_name.items():
            if name == recipient:
                channel.write_message(out)
                return

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