use std::sync::{atomic::AtomicBool, Arc};

use smallvec::{SmallVec, smallvec};

use crate::board::Board;
use self::{ttable::TranspositionTable, move_selector::MoveSelector};

mod ttable;
mod evaluation;
mod search;
mod UCI;
mod move_selector;

/// Grossmeister is a powerful entity that plays the game of Chess.
/// This structure represents a player, it stores his knowledge
/// and experience about the game.
#[derive(Clone, Debug)]
pub struct Grossmeister {
    /// GM's internal board representation
    /// This is usually a copy of a real board
    pub board: Board,

    /// Transposition table is a cache of all positions that Grossmeister
    /// has seen and evaluated.
    /// It's indexex by Zobrist hash of a position mod size
    transposition_table: TranspositionTable,

    move_selectors: SmallVec<[MoveSelector; 0]>,

    should_halt: Arc<AtomicBool>,
    debug: bool,
}

impl Default for Grossmeister {
    fn default() -> Self {
        Self::new(Board::default())
    }
}

impl Grossmeister {
    pub fn new(board: Board) -> Self {
        Self {
            board,
            transposition_table: TranspositionTable::default(),
            move_selectors: smallvec![MoveSelector::default(); 512],
            should_halt: Arc::new(AtomicBool::new(false)),
            debug: false,
        }
    }
}