use authdb::AuthError;
use handlers::{handle_available_images, handle_file, handle_playing_field};
use std::{
    convert::Infallible,
    net::{IpAddr, Ipv4Addr, SocketAddr},
};
use warp::{
    // header,
    http::{Response, StatusCode},
    reply::Reply,
    Filter,
};

mod core;

mod handlers;
// use handlers::handle_auth;

#[derive(Debug)]
struct Unauthorized;
impl warp::reject::Reject for Unauthorized {}

#[derive(Debug)]
struct AuthDBError(AuthError);
impl warp::reject::Reject for AuthDBError {}

/*
fn with_session(
    auth_ctx: Arc<AuthDB>,
) -> impl Filter<Extract = (Username,), Error = warp::Rejection> + Clone {
    header("authentication").and_then({
        move |value: String| {
            let auth_ctx = auth_ctx.clone();
            async move {
                match auth_ctx.validate_session(SessionToken::from(value)).await {
                    Ok(Some(username)) => Ok(username),
                    Ok(None) => Err(warp::reject::custom(Unauthorized)),
                    Err(err) => Err(warp::reject::custom(AuthDBError(err))),
                }
            }
        }
    })
}

fn route_echo_unauthenticated() -> impl Filter<Extract = (Json,), Error = warp::Rejection> + Clone {
    warp::path!("api" / "v1" / "echo" / String).map(|param: String| {
        println!("param: {}", param);
        warp::reply::json(&vec!["unauthenticated", param.as_str()])
    })
}

fn route_authenticate(
    auth_ctx: Arc<AuthDB>,
) -> impl Filter<Extract = (Json,), Error = warp::Rejection> + Clone {
    let auth_ctx = auth_ctx.clone();
    warp::path!("api" / "v1" / "auth")
        .and(warp::post())
        .and(warp::body::json())
        .map(move |param: AuthToken| {
            let res = handle_auth(&auth_ctx, param.clone());
            warp::reply::json(&param)
        })
}

fn route_echo_authenticated(
    auth_ctx: Arc<AuthDB>,
) -> impl Filter<Extract = (Json,), Error = warp::Rejection> + Clone {
    warp::path!("api" / "v1" / "echo" / String)
        .and(with_session(auth_ctx.clone()))
        .map(move |param: String, username: Username| {
            println!("param: {:?}", username);
            println!("param: {}", param);
            warp::reply::json(&vec!["authenticated", username.as_str(), param.as_str()])
        })
}
*/

async fn handle_rejection(err: warp::Rejection) -> Result<impl Reply, Infallible> {
    if let Some(Unauthorized) = err.find() {
        Ok(warp::reply::with_status(
            "".to_owned(),
            StatusCode::UNAUTHORIZED,
        ))
    } else {
        Ok(warp::reply::with_status(
            "".to_owned(),
            StatusCode::INTERNAL_SERVER_ERROR,
        ))
    }
}

#[tokio::main]
pub async fn main() {
    let core = core::Core::new();

    let route_playing_field = warp::path!("api" / "v1" / "field").then(|| handle_playing_field());

    let route_image = warp::path!("api" / "v1" / "image" / String)
        .and(warp::get())
        .then({
            let core = core.clone();
            move |file_name| {
                handle_file(core.clone(), file_name)
            }
        });

    let route_available_images = warp::path!("api" / "v1" / "image").and(warp::get()).then({
        let core = core.clone();
        move || {
            handle_available_images(core.clone())
        }
    });

    let filter = route_playing_field
        .or(route_image)
        .or(route_available_images)
        .recover(handle_rejection);

    let server = warp::serve(filter);
    server
        .run(SocketAddr::new(IpAddr::V4(Ipv4Addr::new(0, 0, 0, 0)), 8001))
        .await;
}