use std::io;
use std::time::Duration;

use slings::net::UdpSocket;
use slings::time::delay_for;

fn main() -> io::Result<()> {
    slings::block_on(async {
        let socket = UdpSocket::bind("127.0.0.1:8081").unwrap();
        println!("udp bind on 127.0.0.1:8081");
        let mut buf = vec![0; 10];
        loop {
            let (n, addr) = socket.recv_from(&mut buf).await?;
            println!("recv bytes {:?} from {}", &buf[..n], addr);
            let buf = b"helloworld";
            let n = socket.send_to(buf, addr).await?;
            println!("send {} bytes", n);
            delay_for(Duration::from_secs(1)).await;
        }
    })
}