//! Demonstrates use of the `ServerBuilder::shutdown_signal` method using `tokio-util`s
//! `CancellationToken` helper using a nonsensical timer. In practice, this cancellation token would
//! be wired throughout your application and typically triggered by OS signals elsewhere.

use std::{io, time::Duration};

use actix_rt::net::TcpStream;
use actix_server::Server;
use actix_service::fn_service;
use tokio_util::sync::CancellationToken;

async fn run(stop_signal: CancellationToken) -> io::Result<()> {
    pretty_env_logger::formatted_timed_builder()
        .parse_env(pretty_env_logger::env_logger::Env::default().default_filter_or("info"));

    let addr = ("127.0.0.1", 8080);
    tracing::info!("starting server on port: {}", &addr.0);

    // let (tx, rx) = tokio::sync::oneshot::channel::<()>();
    // let (tx, mut rx) = tokio::sync::broadcast::channel::<()>(1);

    Server::build()
        .bind("shutdown-signal", addr, || {
            fn_service(|_stream: TcpStream| async { Ok::<_, io::Error>(()) })
        })?
        .shutdown_signal(stop_signal.cancelled_owned())
        // .shutdown_signal(async move {
        //     rx.await;
        //     // rx.recv().await;
        // })
        .run()
        .await
}

#[tokio::main]
async fn main() -> io::Result<()> {
    let stop_signal = CancellationToken::new();

    tokio::spawn({
        let stop_signal = stop_signal.clone();
        async move {
            tokio::time::sleep(Duration::from_secs(10)).await;
            stop_signal.cancel();
        }
    });

    run(stop_signal).await?;
    Ok(())
}