//! NetDesk LAN scan — discover NetDesk hosts on the local network by UDP
//! broadcast (the viewer end of the host's discovery responder). Prints each
//! host's id + name so you can connect by id. Developed by Akronlogic.
//!
//! Usage: netdesk-lan-scan [timeout_ms]   (default 800ms)

use netdesk_core::lan;
use std::time::Duration;

fn main() {
    let ms: u64 = std::env::args()
        .nth(1)
        .and_then(|s| s.parse().ok())
        .unwrap_or(800);
    eprintln!("[lan] scanning for NetDesk hosts on udp/{} for {ms}ms…", lan::LAN_PORT);
    match lan::scan(&lan::broadcast_targets(), Duration::from_millis(ms)) {
        Ok(hosts) if hosts.is_empty() => {
            println!("no NetDesk hosts found on this LAN");
        }
        Ok(hosts) => {
            println!("found {} host(s):", hosts.len());
            for h in hosts {
                // addr.port() is 0 until direct-IP connect ships; the id is what
                // a viewer uses to connect through the relay today.
                println!("  id={}  name=\"{}\"  ip={}", h.id, h.name, h.addr.ip());
            }
        }
        Err(e) => {
            eprintln!("[lan] scan failed: {e}");
            std::process::exit(1);
        }
    }
}