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use std::net::SocketAddr;

use axum::{error_handling::HandleErrorLayer, http::StatusCode, BoxError, Router};
use coarsetime::Duration;
use tower::ServiceBuilder;

use crate::env::env_default;

const TIMEOUT: u64 = 600;

pub async fn srv(router: Router, default_port: u16) -> u16 {
  let port = env_default("PORT", default_port);
  let addr = SocketAddr::from(([0, 0, 0, 0], port));
  tracing::info!("http://{addr}");

  // https://github.com/tokio-rs/axum/discussions/1383
  let middleware = ServiceBuilder::new()
    .layer(HandleErrorLayer::new(|error: BoxError| async move {
      if error.is::<tower::timeout::error::Elapsed>() {
        Ok(StatusCode::REQUEST_TIMEOUT)
      } else {
        Err((
          StatusCode::INTERNAL_SERVER_ERROR,
          format!("Unhandled internal error: {}", error),
        ))
      }
    }))
    .layer(crate::log::Log)
    .timeout(Duration::from_secs(TIMEOUT).into())
    .layer(ServiceBuilder::new());

  axum::Server::bind(&addr)
    .serve(router.layer(middleware.into_inner()).into_make_service())
    .await
    .expect("failed");
  port
}