use slab;

use mio::net::*;

use mio::*;

use std::io;

use utils;

use super::client::*;

use super::room::*;

use super::actions;

use protocol::messages::*;

use super::handlers;

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

pub enum Destination {

    ToSelf(ClientId),

    ToOthers(ClientId)

}

pub struct PendingMessage(pub Destination, pub HWServerMessage);

pub struct HWServer {

    pub clients: Slab<HWClient>,

    pub rooms: Slab<HWRoom>,

    pub lobby_id: RoomId,

    pub output: Vec<PendingMessage>,

    pub removed_clients: Vec<ClientId>,

}

impl HWServer {

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

        let rooms = Slab::with_capacity(rooms_limit);

        let clients = Slab::with_capacity(clients_limit);

        let mut server = HWServer {

            clients, rooms,

            lobby_id: 0,

            output: vec![],

            removed_clients: vec![]

        };

        server.lobby_id = server.add_room();

        server

    }

    pub fn add_client(&mut self) -> ClientId {

        let key: ClientId;

        {

            let entry = self.clients.vacant_entry();

            key = entry.key();

            let client = HWClient::new(entry.key());

            entry.insert(client);

        }

        self.send_self(key, HWServerMessage::Connected(utils::PROTOCOL_VERSION));

        key

    }

    pub fn client_lost(&mut self, client_id: ClientId) {

        actions::run_action(self, client_id,

                            actions::Action::ByeClient("Connection reset".to_string()));

    }

    pub fn add_room(&mut self) -> RoomId {

        let entry = self.rooms.vacant_entry();

        let key = entry.key();

        let room = HWRoom::new(entry.key());

        entry.insert(room);

        key

    }

    pub fn handle_msg(&mut self, client_id: ClientId, msg: HWProtocolMessage) {

        handlers::handle(self, client_id, msg);

    }

    pub fn send_self(&mut self, client_id: ClientId, msg: HWServerMessage) {

        self.output.push(PendingMessage(

            Destination::ToSelf(client_id), msg));

    }

    pub fn send_others(&mut self, client_id: ClientId, msg: HWServerMessage) {

        self.output.push(PendingMessage(

            Destination::ToOthers(client_id), msg));

    }

    pub fn react(&mut self, client_id: ClientId, actions: Vec<actions::Action>) {

        for action in actions {

            actions::run_action(self, client_id, action);

        }

    }

}