use std::net::SocketAddrV4;

use roowho2_lib::proto::Whod;

const RWHOD_BROADCAST_PORT: u16 = 513;

#[tokio::main]
async fn main() -> anyhow::Result<()> {
    let addr = SocketAddrV4::new(std::net::Ipv4Addr::UNSPECIFIED, RWHOD_BROADCAST_PORT);
    let socket = tokio::net::UdpSocket::bind(addr).await?;
    socket.set_broadcast(true)?;

    let mut buf = [0u8; Whod::MAX_SIZE];
    loop {
        let (len, src) = socket.recv_from(&mut buf).await?;
        if len < Whod::HEADER_SIZE {
            eprintln!(
                "Received too short packet from {src}: {len} bytes (needs to be at least {} bytes)",
                Whod::HEADER_SIZE
            );
            continue;
        }
        match Whod::from_bytes(&buf[..len]) {
            Ok(whod) => {
                println!("Received whod packet from {src}:\n{whod:#?}");
            }
            Err(err) => {
                eprintln!("Failed to parse whod packet from {src}: {err}");
            }
        }
    }
}