//! TLS Acceptor Server
//!
//! Using either HTTPie (`http`) or cURL:
//!
//! This commands will produce errors in the server log:
//! ```sh
//! curl 127.0.0.1:8443
//! http 127.0.0.1:8443
//! ```
//!
//! These commands will show "empty reply" on the client but will debug print the TLS stream info
//! in the server log, indicating a successful TLS handshake:
//! ```sh
//! curl -k https://127.0.0.1:8443
//! http --verify=false https://127.0.0.1:8443
//! ```

use std::{
    env,
    fs::File,
    io::{self, BufReader},
    sync::{
        atomic::{AtomicUsize, Ordering},
        Arc,
    },
};

use actix_server::Server;
use actix_service::pipeline_factory;
use actix_tls::rustls::Acceptor as RustlsAcceptor;
use futures_util::future::ok;
use log::info;
use rust_tls::{
    internal::pemfile::certs, internal::pemfile::rsa_private_keys, NoClientAuth, ServerConfig,
};

#[derive(Debug)]
struct ServiceState {
    num: Arc<AtomicUsize>,
}

#[actix_rt::main]
async fn main() -> io::Result<()> {
    env::set_var("RUST_LOG", "actix=trace,basic=trace");
    env_logger::init();

    let mut tls_config = ServerConfig::new(NoClientAuth::new());

    // Load TLS key and cert files
    let cert_file = &mut BufReader::new(File::open("./examples/cert.pem").unwrap());
    let key_file = &mut BufReader::new(File::open("./examples/key.pem").unwrap());

    let cert_chain = certs(cert_file).unwrap();
    let mut keys = rsa_private_keys(key_file).unwrap();
    tls_config
        .set_single_cert(cert_chain, keys.remove(0))
        .unwrap();

    let tls_acceptor = RustlsAcceptor::new(tls_config);

    let count = Arc::new(AtomicUsize::new(0));

    let addr = ("127.0.0.1", 8443);
    info!("starting server on port: {}", &addr.0);

    Server::build()
        .bind("tls-example", addr, move || {
            let count = Arc::clone(&count);

            // Set up TLS service factory
            pipeline_factory(tls_acceptor.clone())
                .map_err(|err| println!("Rustls error: {:?}", err))
                .and_then(move |stream| {
                    let num = count.fetch_add(1, Ordering::Relaxed);
                    info!("[{}] Got TLS connection: {:?}", num, stream);
                    ok(())
                })
        })?
        .workers(1)
        .run()
        .await
}