use axum::{
    error_handling::HandleErrorLayer,
    http::StatusCode,
    response::IntoResponse,
    routing::{get, post},
    handler::Handler,
    Json, Router
};

use serde::{Deserialize, Serialize};
use solarlib::star::Star;
use std::{net::SocketAddr, time::Duration, str::FromStr};

use tower::{BoxError, ServiceBuilder};
use tower_http::trace::TraceLayer;

use tracing_subscriber::prelude::*;

mod errors;

mod handlers;

#[tokio::main]
async fn main() {
    kankyo::init();
    color_eyre::install().unwrap();
        tracing_subscriber::registry()
        .with(tracing_subscriber::EnvFilter::new(
            std::env::var("RUST_LOG")
                .unwrap_or_else(|_| "waifud=info,tower_http=debug".into()),
        ))
        .with(tracing_subscriber::fmt::layer())
        .init();

    let app = Router::new()
        .route("/health", get(health_check))
        .route("/planets/list", get(handlers::planets::list))
        .route("/planets/:uuid", get(handlers::planets::get))
        .route("/planets/:uuid/shutdown", post(handlers::planets::shutdown))
        .route("/planets/:uuid/start", post(handlers::planets::start))
        .route("/planets/:uuid/pause", post(handlers::planets::pause))
        .layer(            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),
                        ))
                    }
                }))
                .timeout(Duration::from_secs(10))
                .layer(TraceLayer::new_for_http())
                .into_inner(),
        )
        .fallback(handler_404.into_service());

    let addr = SocketAddr::from_str(std::env::var("BIND_ADDR").unwrap().as_str().into()).unwrap();
    tracing::info!("Listening on {}", addr);

    axum::Server::bind(&addr)
        .serve(app.into_make_service())
        .await
        .unwrap();
}

async fn health_check() -> &'static str {
    "OK"
}

fn get_star() -> Result<Star, errors::ServiceError> {
    let con_url = std::env::var("QEMU_URL").unwrap_or("qemu:///system".to_string());
    
    Ok(Star::new(con_url)?)
}

async fn handler_404() -> impl IntoResponse {
    StatusCode::NOT_FOUND
}