use slab;

use mio::tcp::*;

use mio::*;

use std::io;

use utils;

use super::client::HWClient;

use super::actions;

type Slab<T> = slab::Slab<T, Token>;

pub struct HWServer {

    listener: TcpListener,

    pub clients: Slab<HWClient>,

    pub rooms: Slab<HWRoom>,

    pub lobby_id: Token,

}

impl HWServer {

    pub fn new(listener: TcpListener, clients_limit: usize, rooms_limit: usize) -> HWServer {

        let mut rooms = Slab::with_capacity(rooms_limit);

        let token = rooms.insert(HWRoom::new()).ok().expect("Cannot create lobby");

        HWServer {

            listener: listener,

            clients: Slab::with_capacity(clients_limit),

            rooms: rooms,

            lobby_id: token,

        }

    }

    pub fn register(&self, poll: &Poll) -> io::Result<()> {

        poll.register(&self.listener, utils::SERVER, Ready::readable(),

                      PollOpt::edge())

    }

    pub fn accept(&mut self, poll: &Poll) -> io::Result<()> {

        let (sock, addr) = self.listener.accept()?;

        info!("Connected: {}", addr);

        let client = HWClient::new(sock);

        let token = self.clients.insert(client)

            .ok().expect("could not add connection to slab");

        self.clients[token].id = token;

        self.clients[token].register(poll, token);

        Ok(())

    }

    pub fn client_readable(&mut self, poll: &Poll,

                           token: Token) -> io::Result<()> {

        let actions;

        {

            actions = self.clients[token].readable(poll);

        }

        self.react(token, poll, actions);

        Ok(())

    }

    pub fn client_writable(&mut self, poll: &Poll,

                           token: Token) -> io::Result<()> {

        self.clients[token].writable(poll)?;

        Ok(())

    }

    pub fn client_error(&mut self, poll: &Poll,

                           token: Token) -> io::Result<()> {

        let actions;

        {

            actions = self.clients[token].error(poll);

        }

        self.react(token, poll, actions);

        Ok(())

    }

    pub fn send(&mut self, token: Token, msg: &String) {

        self.clients[token].send_string(msg);

    }

    pub fn react(&mut self, token: Token, poll: &Poll, actions: Vec<actions::Action>) {

        for action in actions {

            actions::run_action(self, token, poll, action);

        }

    }

}

pub struct HWRoom {

    pub id: Token,

    pub name: String,

    pub password: Option<String>,

    pub protocol_number: u32,

    pub ready_players_number: u8,

}

impl HWRoom {

    pub fn new() -> HWRoom {

        HWRoom {

            id: Token(0),

            name: String::new(),

            password: None,

            protocol_number: 0,

            ready_players_number: 0,

        }

    }

}