use std::time::Duration;
use std::pin::Pin;
use futures::future::Future;
use log::{info, warn};
use async_std::sync::{Arc, Mutex};
use async_std::io::prelude::{ReadExt, WriteExt};
use std::collections::HashMap;
use serde::Serialize;
use serde::de::DeserializeOwned;
use crate::common::interserver::{ServerId, InterserverActor};
use crate::login::character::CharacterServerState;
use crate::ship::ship::ShipServerState;
use crate::entity::gateway::entitygateway::EntityGateway;
#[derive(Debug)]
enum MessageReceiverError {
//InvalidSize,
InvalidPayload,
//NetworkError(std::io::Error),
Disconnected,
}
struct MessageReceiver {
socket: async_std::net::TcpStream,
}
impl MessageReceiver {
fn new(socket: async_std::net::TcpStream) -> MessageReceiver {
MessageReceiver {
socket: socket,
}
}
async fn recv<R: DeserializeOwned + std::fmt::Debug + Send>(&mut self) -> Result<R, MessageReceiverError> {
let mut size_buf = [0u8; 4];
self.socket.read_exact(&mut size_buf).await.map_err(|_| MessageReceiverError::Disconnected)?;
let size = u32::from_le_bytes(size_buf) as usize;
let mut payload = vec![0u8; size];
self.socket.read_exact(&mut payload).await.map_err(|err| MessageReceiverError::Disconnected)?;
let payload = String::from_utf8(payload).map_err(|_| MessageReceiverError::InvalidPayload)?;
let msg = serde_json::from_str(&payload).map_err(|_| MessageReceiverError::InvalidPayload)?;
Ok(msg)
}
}
#[derive(Debug)]
enum InterserverInputAction<S, R> {
NewConnection(ServerId, async_std::sync::Sender<S>),
Message(ServerId, R),
Disconnect(ServerId),
}
async fn interserver_state_loop<A, S, R>(state: Arc<Mutex<A>>, action_receiver: async_std::sync::Receiver<InterserverInputAction<S, R>>)
where
A: InterserverActor<SendMessage=S, RecvMessage=R, Error=()> + Send + 'static,
S: Serialize + Send + 'static,
R: DeserializeOwned + Send + 'static,
{
async_std::task::spawn(async move {
let mut ships = HashMap::new();
loop {
info!("interserver loop");
let action = action_receiver.recv().await.unwrap();
let mut state = state.lock().await;
match action {
InterserverInputAction::NewConnection(server_id, ship_action_sender) => {
ships.insert(server_id, ship_action_sender);
for (server, action) in state.on_connect(server_id).await {
if let Some(sender) = ships.get_mut(&server) {
sender.send(action).await;
}
}
},
InterserverInputAction::Message(server_id, message) => {
let actions = state.action(server_id, message).await;
match actions {
Ok(actions) => {
for (server, action) in actions{
if let Some(sender) = ships.get_mut(&server) {
sender.send(action).await;
}
}
},
Err(err) => {
warn!("[server {:?} state handler error] {:?}", server_id, err);
}
}
},
InterserverInputAction::Disconnect(server_id) => {
let actions = state.on_disconnect(server_id).await;
for (server, action) in actions {
if let Some(sender) = ships.get_mut(&server) {
sender.send(action).await;
}
}
break;
}
}
}
});
}
async fn login_recv_loop<S, R>(server_id: ServerId,
socket: async_std::net::TcpStream,
state_loop_sender: async_std::sync::Sender<InterserverInputAction<S, R>>,
output_loop_sender: async_std::sync::Sender<S>)
where
S: Serialize + std::fmt::Debug + Send + 'static,
R: DeserializeOwned + std::fmt::Debug + Send + 'static,
{
async_std::task::spawn(async move {
state_loop_sender.send(InterserverInputAction::NewConnection(server_id, output_loop_sender)).await;
let mut msg_receiver = MessageReceiver::new(socket);
loop {
info!("login recv loop");
match msg_receiver.recv().await {
Ok(msg) => {
info!("[login recv loop msg] {:?}", msg);
state_loop_sender.send(InterserverInputAction::Message(server_id, msg)).await
},
Err(err) => {
if let MessageReceiverError::Disconnected = err {
info!("[login recv loop disconnect] {:?}", server_id);
state_loop_sender.send(InterserverInputAction::Disconnect(server_id)).await;
break;
}
info!("[login recv loop err] {:?}", err);
}
}
}
});
}
async fn interserver_send_loop<S>(server_id: ServerId,
mut socket: async_std::net::TcpStream,
output_loop_receiver: async_std::sync::Receiver<S>)
where
S: Serialize + std::fmt::Debug + Send + 'static,
{
async_std::task::spawn(async move {
loop {
info!("login send loop");
match output_loop_receiver.recv().await {
Ok(msg) => {
let payload = serde_json::to_string(&msg);
if let Ok(payload) = payload {
let len_bytes = u32::to_le_bytes(payload.len() as u32);
match socket.write_all(&len_bytes).await {
Ok(_) => {},
Err(err) => warn!("send failed: {:?}", err),
}
match socket.write_all(&payload.as_bytes()).await {
Ok(_) => {},
Err(err) => warn!("send failed: {:?}", err),
}
}
},
Err(err) => {
warn!("error in send_loop: {:?}, {:?}", server_id, err)
}
}
}
});
}
pub fn login_listen_mainloop<EG: EntityGateway + 'static>(state: Arc<Mutex<CharacterServerState<EG>>>, port: u16) -> Pin<Box<dyn Future<Output = ()>>> {
Box::pin(async_std::task::spawn(async move {
let listener = async_std::net::TcpListener::bind(&std::net::SocketAddr::from((std::net::Ipv4Addr::new(0,0,0,0), port))).await.unwrap();
let mut id = 0;
let (server_state_sender, server_state_receiver) = async_std::sync::channel(1024);
interserver_state_loop(state, server_state_receiver).await;
loop {
let (socket, addr) = listener.accept().await.unwrap();
info!("new ship server: {:?} {:?}", socket, addr);
id += 1;
let server_id = crate::common::interserver::ServerId(id);
let (client_sender, client_receiver) = async_std::sync::channel(64);
login_recv_loop(server_id, socket.clone(), server_state_sender.clone(), client_sender).await;
interserver_send_loop(server_id, socket.clone(), client_receiver).await;
}
}))
}
pub fn ship_connect_mainloop<EG: EntityGateway + 'static>(state: Arc<Mutex<ShipServerState<EG>>>, ip: std::net::Ipv4Addr, port: u16) -> Pin<Box<dyn Future<Output = ()>>> {
Box::pin(async_std::task::spawn(async move {
let mut id = 0;
let (server_state_sender, server_state_receiver) = async_std::sync::channel(1024);
interserver_state_loop(state, server_state_receiver).await;
loop {
let socket = async_std::net::TcpStream::connect((ip, port)).await.unwrap();
id += 1;
let server_id = crate::common::interserver::ServerId(id);
let (client_sender, client_receiver) = async_std::sync::channel(64);
info!("ship connected to login: {:?}", socket);
login_recv_loop(server_id, socket.clone(), server_state_sender.clone(), client_sender).await;
interserver_send_loop(server_id, socket.clone(), client_receiver).await;
loop {
if let Err(_) = socket.peer_addr() {
info!("ship connected to login: {:?}", socket);
break;
}
async_std::task::sleep(Duration::from_secs(10)).await;
}
}
}))
}