/**
 * Zobrist hashing for position identification
 *
 * Zobrist hashing provides a fast way to uniquely identify board positions
 * for use in the transposition table. Each piece on each square gets a random
 * 64-bit number, and the hash is the XOR of all piece positions plus state.
 */
import { Piece, SquareIndex, InternalBoard } from '../types';
/**
 * Initialize Zobrist hash tables with random 64-bit numbers
 *
 * This should be called once at startup. Uses a simple PRNG seeded
 * with a fixed value for deterministic hashing.
 */
export declare function initZobrist(): void;
/**
 * Compute the Zobrist hash for a board position
 *
 * @param board - Board to hash
 * @returns 64-bit Zobrist hash
 */
export declare function computeZobristHash(board: InternalBoard): bigint;
/**
 * Update hash after moving a piece
 *
 * This is more efficient than recomputing the entire hash.
 *
 * @param hash - Current hash
 * @param piece - Piece being moved
 * @param from - Source square
 * @param to - Destination square
 * @returns Updated hash
 */
export declare function updateHashMove(hash: bigint, piece: Piece, from: SquareIndex, to: SquareIndex): bigint;
/**
 * Update hash after capturing a piece
 *
 * @param hash - Current hash
 * @param capturedPiece - Piece being captured
 * @param square - Square where capture occurred
 * @returns Updated hash
 */
export declare function updateHashCapture(hash: bigint, capturedPiece: Piece, square: SquareIndex): bigint;
/**
 * Toggle side to move in hash
 *
 * @param hash - Current hash
 * @returns Updated hash with toggled side
 */
export declare function toggleSide(hash: bigint): bigint;
/**
 * Update hash for castling rights change
 *
 * @param hash - Current hash
 * @param whiteShortOld - Old white short castling right
 * @param whiteShortNew - New white short castling right
 * @param whiteLongOld - Old white long castling right
 * @param whiteLongNew - New white long castling right
 * @param blackShortOld - Old black short castling right
 * @param blackShortNew - New black short castling right
 * @param blackLongOld - Old black long castling right
 * @param blackLongNew - New black long castling right
 * @returns Updated hash
 */
export declare function updateHashCastling(hash: bigint, whiteShortOld: boolean, whiteShortNew: boolean, whiteLongOld: boolean, whiteLongNew: boolean, blackShortOld: boolean, blackShortNew: boolean, blackLongOld: boolean, blackLongNew: boolean): bigint;
/**
 * Update hash for en passant square change
 *
 * @param hash - Current hash
 * @param oldSquare - Old en passant square (or null)
 * @param newSquare - New en passant square (or null)
 * @returns Updated hash
 */
export declare function updateHashEnPassant(hash: bigint, oldSquare: SquareIndex | null, newSquare: SquareIndex | null): bigint;
/**
 * Add a piece to the hash
 *
 * @param hash - Current hash
 * @param piece - Piece to add
 * @param square - Square where piece is added
 * @returns Updated hash
 */
export declare function addPieceToHash(hash: bigint, piece: Piece, square: SquareIndex): bigint;
/**
 * Remove a piece from the hash
 *
 * @param hash - Current hash
 * @param piece - Piece to remove
 * @param square - Square where piece is removed
 * @returns Updated hash
 */
export declare function removePieceFromHash(hash: bigint, piece: Piece, square: SquareIndex): bigint;
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