// Copyright (C) 2023-2099 The crate authors.
//
// This program is free software: you can redistribute it and/or modify it
// under the terms of the GNU Affero General Public License as published by the
// Free Software Foundation, either version 3 of the License, or (at your
// option) any later version.
//
// This program is distributed in the hope that it will be useful, but WITHOUT
// ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
// FITNESS FOR A PARTICULAR PURPOSE. See the GNU Affero General Public License
// for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with this program. If not, see <https://www.gnu.org/licenses/>.

#![feature(let_chains)]

mod error;
mod web;
mod webhook;
mod xmpp;

use crate::web::webhooks;
use crate::webhook::WebHook;
use crate::xmpp::XmppClient;

use std::convert::Infallible;
use std::net::SocketAddr;
use std::sync::{Arc, Mutex};

use clap::Parser;
use hyper::{
	service::{make_service_fn, service_fn},
	Server,
};
use tokio::sync::mpsc;
use xmpp_parsers::BareJid;

#[derive(Parser, Debug)]
#[command(author, version, about, long_about = None)]
struct Args {
	/// Account address
	#[arg(short, long)]
	jid: BareJid,

	/// Account password
	#[arg(short, long)]
	password: String,

	/// Rooms to join, e.g., room@chat.example.org
	#[arg(short, long = "room", value_name = "ROOM")]
	rooms: Vec<BareJid>,

	/// Nickname to use in rooms
	#[arg(short, long, default_value = "bot")]
	nickname: String,

	/// Token to match the one provided by the Webhook service
	#[arg(short, long)]
	webhook_token: Option<String>,

	/// HTTP Webhook listening address and port, e.g., 127.0.0.1:1234 or [::1]:1234
	#[arg(long, default_value = "[::1]:3000")]
	addr: SocketAddr,
}

#[tokio::main]
async fn main() {
	pretty_env_logger::init();

	let args = Args::parse();
	let (value_tx, mut value_rx) = mpsc::unbounded_channel::<WebHook>();

	if let Some(token) = args.webhook_token {
		let value_tx = Arc::new(Mutex::new(value_tx));
		let make_svc = make_service_fn(move |_conn| {
			let value_tx = value_tx.clone();
			let token = token.clone();
			async move {
				Ok::<_, Infallible>(service_fn(move |req| {
					let value_tx = value_tx.clone();
					let token = token.clone();
					webhooks(req, token, value_tx)
				}))
			}
		});
		let server = Server::bind(&args.addr).serve(make_svc);
		println!("Listening on http://{}", &args.addr);

		let _join = tokio::spawn(server);
	}

	let mut client = XmppClient::new(
		&String::from(args.jid),
		args.password.as_str(),
		args.rooms,
		args.nickname,
	);

	loop {
		tokio::select! {
			_ = client.next() => (),
			wh = value_rx.recv() => {
				if let Some(wh) = wh {
					client.webhook(wh).await
				}
			}
		}
	}
}