//! datse server over HTTP
use super::*;
use warp::{
    Filter,
    hyper::body::Bytes,
};
use std::{
    str,
    sync::Arc,
    convert::Infallible,
};
use cryptohelpers::{
    sha256,
    rsa,
};

/// Web server config
#[derive(Debug, Clone, PartialEq, Eq)]
pub struct Config
{
    
}

pub mod settings;
mod state;

mod source;
mod forwarded_list;
mod auth;

/// Main entry point for web server
pub async fn main(state: server::state::ServerState, cfg: settings::Settings) -> eyre::Result<()>
{
    let state = Arc::new(state::State::new(state, cfg.clone()));
    let state = warp::any().map(move || state.clone());

    // Extract the client IP or fail with custom rejection
    let client_ip = warp::addr::remote()
	.and(warp::header("X-Forwarded-For"))
	.map(source::extract(cfg.trust_x_forwarded_for))
        .and_then(|req: Result<std::net::IpAddr, _>| async move {req.map_err(warp::reject::custom)});
    
    let auth = {
	let req = warp::path("req")
	    .and(client_ip.clone()).and(state.clone()); //TODO

	let resp = {
	    let resp_auth_with_state = warp::post()
		.and(client_ip.clone()).and(state.clone())
		.and(warp::path::param().map(|req_id: uuid::Uuid| req_id));

	    let resp_auth_key  = resp_auth_with_state.clone()
		.and(warp::path("si")
		     .and(warp::path::param().map(|num: usize| std::cmp::max(1, num))
			  .or(warp::path::end().map(|| 1usize)).unify()))
		.and(warp::body::content_length_limit(cfg.max_body_len.0))
		.and(warp::body::bytes())
		.and_then(auth::auth_key);

	    // -- Paths --
	    
	    let resp_auth_pass = resp_auth_with_state
		.and(warp::path::param().map(|hash: auth::Sha256Hash| hash.0))
		.and_then(auth::auth_pass);

	    let resp = warp::path("resp")
		.and(resp_auth_key
		     .or(resp_auth_pass));


	    // /resp/<req_id>/pw/<passwd hash>
	    // /resp/<req_id>/si[/<num of sigs in body>]
	    resp
	};

	warp::path("auth").and(req)
    };
    
    todo!()
}