//! Basic bootstrap example (equivalent to example1.cpp).
//!
//! Usage:
//!   cargo run --example join -- 10000
//!   cargo run --example join -- 10001 127.0.0.1 10000
//!
//! The first invocation creates a standalone node.
//! The second joins via the first.

use std::time::Duration;
use tesseras_dht::Node;
use tesseras_dht::nat::NatState;

fn main() {
    env_logger::Builder::from_env(
        env_logger::Env::default().default_filter_or("info"),
    )
    .format(|buf, record| {
        use std::io::Write;
        writeln!(
            buf,
            "{} [{}] {}",
            record.level(),
            record.target(),
            record.args()
        )
    })
    .init();

    let args: Vec<String> = std::env::args().collect();
    if args.len() < 2 {
        eprintln!("usage: {} port [host port]", args[0]);
        eprintln!();
        eprintln!("example:");
        eprintln!("  $ {} 10000 &", args[0]);
        eprintln!("  $ {} 10001 127.0.0.1 10000", args[0]);
        std::process::exit(1);
    }

    let port: u16 = args[1].parse().expect("invalid port");

    let mut node = Node::bind(port).expect("bind failed");
    node.set_nat_state(NatState::Global);

    println!("Node {} listening on port {port}", node.id_hex());

    if args.len() >= 4 {
        let dst_host = &args[2];
        let dst_port: u16 = args[3].parse().expect("invalid dst port");

        match node.join(dst_host, dst_port) {
            Ok(()) => println!("Join request sent"),
            Err(e) => {
                eprintln!("Join failed: {e}");
                std::process::exit(1);
            }
        }
    }

    // Event loop
    loop {
        node.poll().ok();
        std::thread::sleep(Duration::from_millis(100));
    }
}