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use anyhow::Result;
use futures_util::{SinkExt, StreamExt};
use log::{debug, info, warn};
use std::{sync::Arc, time::Duration};
use tokio::{
net::TcpListener,
spawn,
sync::{broadcast, RwLock},
time::sleep,
};
use tokio_tungstenite::tungstenite::Message;
use undercooked::{
customer::customer,
game::Game,
load_gamedata,
protocol::{PacketC, PacketS, PlayerID},
};
#[tokio::main]
async fn main() -> Result<()> {
env_logger::init_from_env("LOG");
let ws_listener = TcpListener::bind("0.0.0.0:27032").await?;
info!("listening for websockets on {}", ws_listener.local_addr()?);
let data = load_gamedata();
let game = Arc::new(RwLock::new(Game::new(data.into())));
let (tx, rx) = broadcast::channel::<PacketC>(1024);
{
let game = game.clone();
spawn(async move {
let dt = 1. / 25.;
loop {
{
let mut g = game.write().await;
g.tick(dt);
while let Some(p) = g.packet_out() {
debug!("-> {p:?}");
let _ = tx.send(p);
}
}
sleep(Duration::from_secs_f32(dt)).await;
}
});
}
spawn(customer(game.clone(), rx.resubscribe()));
for id in (1..).map(PlayerID) {
let (sock, addr) = ws_listener.accept().await?;
let Ok(sock) = tokio_tungstenite::accept_async(sock).await else {
warn!("invalid ws handshake");
continue;
};
let (mut write, mut read) = sock.split();
let game = game.clone();
let mut rx = rx.resubscribe();
info!("{addr} connected via ws");
let init = game.write().await.prime_client(id);
spawn(async move {
for p in init {
if let Err(e) = write
.send(tokio_tungstenite::tungstenite::Message::Text(
serde_json::to_string(&p).unwrap(),
))
.await
{
warn!("ws error on init: {e}");
return;
}
}
while let Ok(packet) = rx.recv().await {
if let Err(e) = write
.send(tokio_tungstenite::tungstenite::Message::Text(
serde_json::to_string(&packet).unwrap(),
))
.await
{
warn!("ws error: {e}");
break;
}
}
});
spawn(async move {
while let Some(Ok(message)) = read.next().await {
match message {
Message::Text(line) => {
let Ok(packet): Result<PacketS, _> = serde_json::from_str(&line) else {
warn!("invalid json over ws");
break;
};
debug!("<- {id:?} {packet:?}");
if let Err(e) = game.write().await.packet_in(id, packet) {
warn!("client error: {e}");
}
}
Message::Close(_) => break,
_ => (),
}
}
let _ = game.write().await.packet_in(id, PacketS::Leave);
});
}
Ok(())
}
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