import { PositionString, IBaseSearchInfo, IScoreInfo, Move, IBaseSearchOptions, IBaseSearchResult } from '@multi-game-engines/core';

/**
 * Branded Type for FEN (Forsyth-Edwards Notation) strings.
 */
type FEN = PositionString<"FEN">;
/**
 * チェス用の探索オプション。
 */
interface IChessSearchOptions extends IBaseSearchOptions {
    fen?: FEN | undefined;
    depth?: number | undefined;
    time?: number | undefined;
    nodes?: number | undefined;
}
/**
 * チェス用の思考情報。
 */
interface IChessSearchInfo extends IBaseSearchInfo {
    depth?: number | undefined;
    seldepth?: number | undefined;
    score?: IScoreInfo | undefined;
    nodes?: number | undefined;
    nps?: number | undefined;
    time?: number | undefined;
    pv?: Move[] | undefined;
    hashfull?: number | undefined;
    multipv?: number | undefined;
}
/**
 * チェス用の探索結果。
 */
interface IChessSearchResult extends IBaseSearchResult {
    bestMove: Move | null;
    ponder?: Move | null | undefined;
}
/**
 * チェスの駒識別子。
 */
type ChessPiece = "P" | "N" | "B" | "R" | "Q" | "K" | "p" | "n" | "b" | "r" | "q" | "k";
/**
 * Parsed FEN result containing the 2D board array and turn metadata.
 */
interface ParsedFEN {
    /** 8x8 grid of pieces. board[0] is Rank 8, board[7] is Rank 1. */
    board: (ChessPiece | null)[][];
    /** Whose turn it is: 'w' for White, 'b' for Black. */
    turn: "w" | "b";
}
/**
 * FEN 形式の文字列を厳密に検証し、Branded Type を返します。
 */
declare function createFEN(pos: string): FEN;
declare function isValidChessPiece(char: string): char is ChessPiece;
/**
 * FEN 文字列を解析して 2D 盤面配列に変換します。
 */
declare function parseFEN(fen: FEN): ParsedFEN;

export { type ChessPiece, type FEN, type IChessSearchInfo, type IChessSearchOptions, type IChessSearchResult, type ParsedFEN, createFEN, isValidChessPiece, parseFEN };