use tokio::net::TcpListener;
use tracing_subscriber::{layer::SubscriberExt, util::SubscriberInitExt};
use unnamed_server::state::AppState;

use crate::config::Config;

mod config;

#[tokio::main]
#[tracing::instrument]
async fn main() -> Result<(), unnamed_server::Error> {
    tracing_subscriber::registry()
        .with(
            tracing_subscriber::EnvFilter::try_from_default_env()
                .unwrap_or_else(|_| "unnamed_server=debug".into()),
        )
        .with(tracing_subscriber::fmt::layer())
        .init();

    let _ = dotenvy::dotenv();

    let config = Config::init();

    let state = AppState::new(config.database_url).await?;

    let app = unnamed_server::router(state);

    let listener = TcpListener::bind("127.0.0.1:30000").await?;

    tracing::info!("Server listening on http://{}", listener.local_addr()?);

    axum::serve(listener, app)
        .with_graceful_shutdown(shutdown_signal())
        .await
        .map_err(From::from)
}

async fn shutdown_signal() {
    let ctrl_c = async {
        tokio::signal::ctrl_c()
            .await
            .expect("failed to install Ctrl+C handler");
    };

    #[cfg(unix)]
    let terminate = async {
        tokio::signal::unix::signal(tokio::signal::unix::SignalKind::terminate())
            .expect("failed to install signal handler")
            .recv()
            .await;
    };

    #[cfg(not(unix))]
    let terminate = std::future::pending::<()>();

    tokio::select! {
        _ = ctrl_c => {},
        _ = terminate => {},
    }
}