use listenfd::ListenFd;
use tokio::net::TcpListener;

use backend::get_router;

#[tokio::main]
async fn main() {
    let app = get_router();

    let mut listenfd = ListenFd::from_env();

    let listener = match listenfd.take_tcp_listener(0).unwrap() {
        // if we are given a tcp listener on listen fd 0, we use that one
        Some(listener) => {
            listener.set_nonblocking(true).unwrap();
            TcpListener::from_std(listener).unwrap()
        }
        // otherwise fall back to local listening
        None => TcpListener::bind("0.0.0.0:8080").await.unwrap(),
    };

    println!("Listening on {}", listener.local_addr().unwrap());
    axum::serve(listener, app).await.unwrap();
}