import { getBoardState, calculateDeep } from "../protocol/state.js";
import { PositionPrompter } from "../protocol/positionPrompter.js";
export interface LegalMoveResult {
data?: {
isLegal: boolean;
message: string;
};
error?: string;
}
export interface BoardStateResult {
data?: {
state: any;
description: string;
};
error?: string;
}
export class BoardStateService {
checkLegalMove(fen: string, move: string): LegalMoveResult {
if (!fen) {
return { error: "Missing required argument: fen" };
}
if (!move) {
return { error: "Missing required argument: move" };
}
try {
const boardState = getBoardState(fen);
if (!boardState) {
return {
data: {
isLegal: false,
message: "Invalid FEN string"
}
};
}
const legalMoves = boardState.legalMoves || [];
const moveToCheck = move.trim();
const isLegal =
legalMoves.includes(moveToCheck) ||
legalMoves.map((m: string) => m.toLowerCase()).includes(moveToCheck.toLowerCase());
return {
data: {
isLegal,
message: isLegal
? "Move is legal."
: "Move is not legal in this position.",
}
};
} catch (error) {
return {
data: {
isLegal: false,
message: "Error checking move legality."
}
};
}
}
getBoardStateForMove(fen: string, move: string): BoardStateResult {
if (!fen) {
return { error: "Missing required argument: fen" };
}
if (!move) {
return { error: "Missing required argument: move" };
}
try {
const boardState = calculateDeep(fen, move);
if (!boardState || !boardState.validfen) {
return {
error: "Invalid move or FEN. Cannot generate board state prompt."
};
}
const prompt = new PositionPrompter(boardState).generatePrompt();
return {
data: {
state: boardState,
description: prompt
}
};
} catch (error) {
return {
error: "Error generating board state prompt"
};
}
}
getBoardStateForFen(fen: string): BoardStateResult {
if (!fen) {
return { error: "Missing required argument: fen" };
}
try {
const boardState = getBoardState(fen);
if (!boardState || !boardState.validfen) {
return {
error: "Invalid FEN. Cannot generate board state prompt."
};
}
const prompt = new PositionPrompter(boardState).generatePrompt();
return {
data: {
state: boardState,
description: prompt
}
};
} catch (error) {
return {
error: "Error generating board state prompt"
};
}
}
}
