mod captcha_solutions;
mod config;
mod errors;
mod forms;
mod logging;
mod mailer;
mod routes;
mod templates;

use anyhow::Result;
use axum::extract::Extension;
use axum::routing::{get, post};
use axum::{error_handling::HandleErrorLayer, http::StatusCode, BoxError};
use axum::{Router, Server};
use axum_extra::routing::SpaRouter;
use std::net::{IpAddr, Ipv4Addr, SocketAddr};
use std::process;
use std::sync::Arc;
use std::time::Duration;
use tower::buffer::BufferLayer;
use tower::limit::RateLimitLayer;
use tower::ServiceBuilder;
use tower_http::trace::{DefaultOnResponse, TraceLayer};
use tracing::Level;
use tracing_appender::non_blocking::WorkerGuard;

async fn init() -> Result<WorkerGuard> {
    let mut config = config::Config::new()?;
    let path_prefix = config.path_prefix.clone();
    let mailer = Arc::new(mailer::Mailer::new(&mut config)?);

    let address = config.socket_address.address;
    let socket_address = SocketAddr::new(
        IpAddr::V4(Ipv4Addr::new(
            address[0], address[1], address[2], address[3],
        )),
        config.socket_address.port,
    );

    let tracing_worker_gurad = logging::init_logger(&config.logging);

    let config = Arc::new(config);
    let captcha_solutions = Arc::new(captcha_solutions::SharedCaptchaSolutions::new());

    let spa = SpaRouter::new(&format!("{}/static", &path_prefix), "static");

    let routes = Router::new()
        .route("/", get(routes::index))
        .route("/submit", post(routes::submit))
        .route("/success", get(routes::success));

    let app = Router::new()
        .nest(&path_prefix, routes)
        .merge(spa)
        .layer(TraceLayer::new_for_http().on_response(DefaultOnResponse::new().level(Level::INFO)))
        .layer(
            ServiceBuilder::new()
                .layer(HandleErrorLayer::new(|err: BoxError| async move {
                    (
                        StatusCode::INTERNAL_SERVER_ERROR,
                        format!("Unhandled error: {}", err),
                    )
                }))
                .layer(BufferLayer::new(1024))
                .layer(RateLimitLayer::new(2, Duration::from_secs(3))),
        )
        .layer(Extension(config))
        .layer(Extension(mailer))
        .layer(Extension(captcha_solutions));

    Server::bind(&socket_address)
        .serve(app.into_make_service())
        .await
        .unwrap();

    Ok(tracing_worker_gurad)
}

#[tokio::main]
async fn main() {
    let _tracing_worker_gurad = init().await.unwrap_or_else(|e| {
        eprintln!("{e:?}");
        process::exit(1);
    });
}