use std::{net::SocketAddr, process::exit};
use axum::{Router, response::Response, http::{Request, StatusCode}, middleware::{Next, self}, extract::ConnectInfo, RequestExt, body::HttpBody, Extension};
use tower_cookies::CookieManagerLayer;
use tracing::{metadata::LevelFilter, error, info};
use tracing_subscriber::{prelude::__tracing_subscriber_SubscriberExt, util::SubscriberInitExt, Layer, filter::filter_fn};
use types::http::ResponseCode;

use crate::{api::{pages, auth, users, posts}, types::extract::RouterURI};

mod api;
mod database;
mod types;
mod console;

async fn serve<B>(req: Request<B>, next: Next<B>) -> Response where 
    B: Send + Sync + 'static + HttpBody,
{
    let uri = req.uri();
    let file = ResponseCode::Success.file(&uri.to_string()).await;
    if file.status() != StatusCode::OK {
        return next.run(req).await;
    }
    file
}

async fn log<B>(mut req: Request<B>, next: Next<B>) -> Response where 
    B: Send + Sync + 'static + HttpBody,
{

    let Ok(ConnectInfo(info)) = req.extract_parts::<ConnectInfo<SocketAddr>>().await else {
        return next.run(req).await
    };

    console::log(info.ip(), req.method().clone(), req.uri().clone(), None, None).await;

    next.run(req).await
}

async fn not_found() -> Response {
    ResponseCode::NotFound.file("/404.html").await
}

#[tokio::main]
async fn main() {

    let fmt_layer = tracing_subscriber::fmt::layer();
    tracing_subscriber::registry() 
        .with(
            fmt_layer.with_filter(LevelFilter::TRACE).with_filter(filter_fn(|metadata| {
                metadata.target().starts_with("xssbook")
            }))
        )
        .init();

    if database::init().is_err() {
        error!("Failed to connect to the sqlite database");
        exit(1)
    };

    let app = Router::new()
    .fallback(not_found)
    .nest("/", pages::router())
    .layer(middleware::from_fn(log))
    .layer(middleware::from_fn(serve))
    .nest("/api/auth", auth::router()
        .layer(Extension(RouterURI("/api/auth")))
    ).nest("/api/users", users::router()
        .layer(Extension(RouterURI("/api/users")))
    ).nest("/api/posts", posts::router()
        .layer(Extension(RouterURI("/api/posts")))
    ).layer(CookieManagerLayer::new());

    let Ok(addr) = "[::]:8080".parse::<std::net::SocketAddr>() else {
        error!("Failed to parse port binding");
        exit(1)
    };

    info!("listening on {}", addr);
    
    axum::Server::bind(&addr)
        .serve(app.into_make_service_with_connect_info::<SocketAddr>())
        .await
        .unwrap_or(());
    
}