use mio;

use server::{

    server::HWServer,

    client::ClientId,

    actions::{Action, Action::*}

};

use protocol::messages::{

    HWProtocolMessage, HWServerMessage::*

};

use utils::is_name_illegal;

pub fn handle(server: & mut HWServer, client_id: ClientId, message: HWProtocolMessage) {

    match message {

        HWProtocolMessage::Nick(nick) => {

            let actions;

            {

                let client = &mut server.clients[client_id];

                debug!("{} {}", nick, is_name_illegal(&nick));

                actions = if client.room_id != None {

                    unreachable!()

                }

                else if !client.nick.is_empty() {

                    vec![ProtocolError("Nickname already provided.".to_string())]

                }

                else if     is_name_illegal(&nick) {

                    vec![ByeClient("Illegal nickname! Nicknames must be between 1-40 characters long, must not have a trailing or leading space and must not have any of these characters: $()*+?[]^{|}".to_string())]

                }

                else {

                    client.nick = nick.clone();

                    vec![Nick(nick).send_self().action(),

                         CheckRegistered]

                };

            }

            server.react(client_id, actions);

        },

        HWProtocolMessage::Proto(proto) => {

            let actions;

            {

                let client = &mut server.clients[client_id];

                actions = if client.protocol_number != 0 {

                    vec![ProtocolError("Protocol already known.".to_string())]

                }

                else if proto == 0 {

                    vec![ProtocolError("Bad number.".to_string())]

                }

                else {

                    client.protocol_number = proto;

                    vec![Proto(proto).send_self().action(),

                         CheckRegistered]

                };

            }

            server.react(client_id, actions);

        },

        _ => warn!("Incorrect command in logging-in state"),

    }

}