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use std::{io::stdin, thread::{JoinHandle, spawn, sleep}, str::Split, time::Duration, sync::{Arc, atomic::AtomicBool}};
use crate::{board::{Board, io::IO, color::Color}, moves::{Move, MoveKind}};
use super::Grossmeister;
const NAME: &str = "Chessnost";
const AUTHOR: &str = "Eugene Sokolov";
impl Grossmeister {
pub fn start(&mut self) {
let mut search_handle: Option<JoinHandle<Self>> = None;
loop {
let mut cmd = String::new();
stdin().read_line(&mut cmd).unwrap();
let mut tokens = cmd.trim().split(' ');
if let Some(token) = tokens.next() {
match token {
"uci" => {
println!("id name {}", NAME);
println!("id author {}", AUTHOR);
println!("uciok");
}
"debug" => {
if let Some(token) = tokens.next() {
match token {
"on" => self.debug = true,
"off" => self.debug = false,
_ => {
panic!("Wrong option to debug: {}. CMD: {}", token, cmd);
},
}
};
}
"isready" => {
println!("readyok");
}
"setoption" => {
todo!()
}
"ucinewgame" => {
*self = Self::default()
}
"position" => {
if let Some(token) = tokens.next() {
match token {
"startpos" => {
self.board = Board::new();
if let Some(token) = tokens.next() {
if token == "moves" {
for token in tokens.by_ref() {
let input_move = Move::from_notation(token.chars());
let moves = self.board.generate_pseudolegal_moves();
if let Some(mov) = moves
.iter()
.find(|m| {
let promo_matches = match input_move.kind {
MoveKind::Promotion(piece) => match m.kind {
MoveKind::Promotion(another_piece) => piece.without_color() == another_piece.without_color(),
_ => false
},
_ => true,
};
promo_matches && m.source == input_move.source && m.target == input_move.target
}) {
self.board.make_move(*mov);
} else {
panic!("Illegal move: {}", input_move);
}
}
} else {
panic!("Unexpected token: {}. CMD: {}", token, cmd);
}
}
}
"fen" => {
// TODO: handle "moves" command after "fen"?
let index = "position fen".len() + 1;
if let Some(fen) = cmd.get(index..) {
self.board = Board::from_FEN(fen.to_string());
};
}
_ => {}
}
} else {
todo!("Decide what to do when position is now provided")
}
}
"go" => {
// Before we go, let's join to the latest search
if let Some(hand) = search_handle.take() {
let better_self = hand.join().unwrap();
self.transposition_table = better_self.transposition_table;
}
search_handle = Some(self.parse_go(tokens));
}
"stop" => {
self.should_halt.store(true, std::sync::atomic::Ordering::Relaxed);
}
"ponderhit" => todo!(),
"quit" => break,
_ => {},
}
}
}
}
fn parse_go(&mut self, mut tokens: Split<char>) -> JoinHandle<Self> {
if let Some(token) = tokens.next() {
match token {
"searchmoves" => todo!(),
"ponder" => todo!(),
"wtime" => {
if let Some(time) = tokens.next() {
let time: u64 = time.parse().unwrap();
self.board.clock.time[Color::White as usize] = Duration::from_millis(time);
}
}
"btime" => {
if let Some(time) = tokens.next() {
let time: u64 = time.parse().unwrap();
self.board.clock.time[Color::Black as usize] = Duration::from_millis(time);
}
}
"winc" => {
if let Some(time) = tokens.next() {
let time: u64 = time.parse().unwrap();
self.board.clock.increment[Color::White as usize] = Duration::from_millis(time);
}
}
"binc" => {
if let Some(time) = tokens.next() {
let time: u64 = time.parse().unwrap();
self.board.clock.increment[Color::Black as usize] = Duration::from_millis(time);
}
}
"movestogo" => {}
"depth" => {
if let Some(depth) = tokens.next() {
let depth: u8 = depth.parse().unwrap();
return self.create_search_thread(depth, Duration::MAX);
}
},
"nodes" => todo!(),
"mate" => todo!(),
"movetime" => {
if let Some(time) = tokens.next() {
let time: u64 = time.parse().unwrap();
let duration = Duration::from_millis(time);
return self.create_search_thread(u8::MAX, duration)
}
},
"infinite" => {
return self.create_search_thread(u8::MAX, Duration::MAX);
},
_ => {}
}
return self.parse_go(tokens)
}
let color = self.board.color();
let duration = (self.board.clock.time[color as usize] + self.board.clock.increment[color as usize]) / 20;
self.create_search_thread(u8::MAX, duration)
}
fn create_search_thread(&self, depth: u8, duration: Duration) -> JoinHandle<Self> {
let ordering = std::sync::atomic::Ordering::Relaxed;
let should_halt = self.should_halt.clone();
let should_terminate = Arc::new(AtomicBool::new(true));
if duration < Duration::MAX {
// Create a thread that will terminate search when the duration is expired
let should_terminate = should_terminate.clone();
spawn(move || {
println!("info string terminating search in {:?}", duration);
sleep(duration);
if should_terminate.load(ordering) {
should_halt.store(true, ordering);
}
});
}
// Clone current self and move it into thread to analyze a position
let mut gm = self.clone();
spawn(move || {
gm.iterative_deepening(depth);
should_terminate.store(false, ordering); // No need to terminate search anymore
gm // Return better version of Self
})
}
}
|
