import { Chess} from 'chess.js';
import { getBoardState } from "./state.js"
import { PositionPrompter } from "./positionPrompter.js";
export interface StockfishResponse {
success: boolean;
evaluation: number | null;
mate: string | null;
bestmove: string;
continuation: string;
}
export const getChessEvaluation = async (fen: string, depth: number) => {
const stockfishUrl = `https://stockfish.online/api/s/v2.php?fen=${fen}&depth=${depth}`;
const response = await fetch(stockfishUrl);
const data = (await response.json()) as StockfishResponse;
return data;
};
export const generateChessAnalysis = (data: StockfishResponse, fen: string) => {
if (!data.bestmove) {
return {
bestMove: 'Unknown',
reasoning: 'Insufficient data to determine best move.',
topLine: 'unknown',
numberEval: 0,
};
}
const chess = new Chess(fen);
const bestMove = data.bestmove.split(' ')[1];
const variation = data.continuation;
const evalNumber = data.evaluation != null ? data.evaluation : -100000;
const moves = variation.split(' ');
let sanBestMove = '';
let sanVariation = '';
chess.move(bestMove);
const history = chess.history({ verbose: true });
sanBestMove = history[0].san;
chess.load(fen);
for (let i = 0; i < moves.length; i++) {
chess.move(moves[i]);
}
const varHistory = chess.history({ verbose: true });
for (let i = 0; i < varHistory.length; i++) {
sanVariation += `${varHistory[i].san} `;
}
return {
bestMove: sanBestMove || 'Unknown',
reasoning: new PositionPrompter(getBoardState(fen)).generatePrompt(),
topLine: sanVariation,
numberEval: evalNumber,
};
};
export interface HangingPieceAnalysis {
hangingPieces: string[];
unprotectedPieces: string[];
semiProtectedPieces: string[];
}
