use std::{
    collections::HashMap,
    error::Error,
    net::SocketAddr,
};
use warp::Filter;

mod types;
mod conn;
mod minesweeper;
use types::*;

use tokio::sync::RwLock;

const FONT_FILE: &[u8] = include_bytes!("./VT323-Regular.ttf");

fn main() -> Result<(), Box<dyn Error>> {
    let conf = Config {
        cert_path: "./cert.pem".to_owned(),
        pkey_path: "./cert.rsa".to_owned(),
        page_path: "./page.html".to_owned(),
        socket_addr: ([0,0,0,0],31235).into(),
    };

    let state = State {
        conf,
        peers: PeerMap::new(RwLock::new(HashMap::new())),
    };

    tokio_main(state)
}

#[tokio::main]
async fn tokio_main(state: State) -> Result<(), Box<dyn Error>> {
    // Start the temporary single lobby
    let (cmd_tx, cmd_rx) = tokio::sync::mpsc::unbounded_channel();
    let _game_t = tokio::spawn(gameloop(cmd_rx, state.peers.clone()));

    let cmd_filter = warp::any().map(move || cmd_tx.clone());

    let page_route = {
        use warp::*;
        get()
        .and(path("font.ttf"))
        .map(|| FONT_FILE)
        .or(fs::file(state.conf.page_path.clone()))
    };

    let websocket_route = {
        let state = state.clone();
        use warp::*;
        path("ws")
            .and(ws())
            .and(addr::remote())
            .and(cmd_filter)
            .map(move |ws: warp::ws::Ws, saddr: Option<SocketAddr>, cmd_tx: CmdTx| {
                let state = state.clone();
                println!("conn from {saddr:?}");
                ws.on_upgrade(move |socket| {
                    let conn_data = types::ConnData { remote_addr: saddr.unwrap(), cmd_tx: cmd_tx.clone(), peers: state.peers.clone() };
                    conn::peer_connection(socket, conn_data)
                })
            })
    };
    let routes = websocket_route.or(page_route);

    let server = warp::serve(routes)
        .tls()
        .cert_path(state.conf.cert_path)
        .key_path(state.conf.pkey_path)
        .run(state.conf.socket_addr);
    println!("Serving on {}", state.conf.socket_addr);
    server.await;
    Ok(())
}

// If a move is made, broadcast new board, else just send current board
async fn gameloop(mut move_rx: tokio::sync::mpsc::UnboundedReceiver<MetaMove>, peers: PeerMap) {
    use minesweeper::*;
    let mut game = Game::new(Board::new(75,35), (75*35)/8);
    let mut latest_player_name = None;
    while let Some(req) = move_rx.recv().await {
        let done = game.phase == Phase::Die || game.phase == Phase::Win;
        match req {
            MetaMove::Move(m, o) => if !done {
                game = game.act(m);
                if game.phase == Phase::Win || game.phase == Phase::Die {
                    game.board = game.board.grade();
                }
                latest_player_name = peers.read().await.get(&o).map(|p| p.name.clone());
            },
            MetaMove::Dump => (),
            MetaMove::Reset => { game = Game::new(Board::new(75,35), (75*35)/8); },
        }
        use warp::ws::Message;
        let mut reply = vec![Message::binary(game.board.render())];
        let lpname = latest_player_name.as_ref().map(|s| s.as_str()).unwrap_or("unknown player");
        match game.phase {
            Phase::Win => { reply.push(Message::text(format!("win {lpname}"))); },
            Phase::Die => { reply.push(Message::text(format!("lose {lpname}"))); },
            _ => (),
        }
        {
            let peers = peers.read().await;
            for (addr, p) in peers.iter() {
                for r in reply.iter() {
                    if let Err(e) = p.tx.send(r.clone()) {
                        println!("couldn't send game update {r:?} to {addr}: {e}");
                    }
                }
            }
        }
    }
}