ChessAgine MCP

import { MasterGames } from "../types/types.js"; export const getOpeningStats = async (fen: string): Promise<MasterGames | null> => { try { const masterEndpoint = `https://explorer.lichess.ovh/masters?fen=${fen}&moves=12&topGames=15`; const response = await fetch(masterEndpoint); if (!response.ok) { throw new Error(`HTTP error! status: ${response.status}`); } const masterData = (await response.json()) as MasterGames; return masterData; } catch (error) { console.error("Error fetching opening stats:", error); return null; } }; export const getLichessOpeningStats = async (fen: string): Promise<MasterGames | null> => { try { const masterEndpoint = `https://explorer.lichess.ovh/lichess?fen=${fen}&moves=12&topGames=4`; const response = await fetch(masterEndpoint); if (!response.ok) { throw new Error(`HTTP error! status: ${response.status}`); } const masterData = (await response.json()) as MasterGames; return masterData; } catch (error) { console.error("Error fetching opening stats:", error); return null; } }; export const getOpeningStatSpeech = (masterData: MasterGames): string => { const { opening, white, draws, black, moves, topGames } = masterData; const totalGames = (white ?? 0) + (draws ?? 0) + (black ?? 0); if (totalGames === 0) { return "There is no game data available for this opening."; } const whiteWinRate = ((white / totalGames) * 100 || 0).toFixed(2); const drawRate = ((draws / totalGames) * 100 || 0).toFixed(2); const blackWinRate = ((black / totalGames) * 100 || 0).toFixed(2); let speech = `Opening: ${opening?.name ?? "Unknown"} (${ opening?.eco ?? "N/A" }). `; speech += `Out of ${totalGames} master-level games, White wins ${whiteWinRate} percent, draws occur ${drawRate} percent, and Black wins ${blackWinRate} percent. `; if (moves?.length) { speech += "The most common next moves are: "; moves.forEach((move, index) => { const moveTotal = (move.white ?? 0) + (move.draws ?? 0) + (move.black ?? 0); const moveWhite = ((move.white / moveTotal) * 100 || 0).toFixed(2); const moveDraw = ((move.draws / moveTotal) * 100 || 0).toFixed(2); const moveBlack = ((move.black / moveTotal) * 100 || 0).toFixed(2); speech += `Move ${index + 1}: ${ move.san ?? "Unknown" }, played in games with average rating ${ move.averageRating ?? 0 }. White wins ${moveWhite} percent, draws ${moveDraw} percent, Black wins ${moveBlack} percent. `; }); } if (topGames?.length) { speech += "Some notable games include: "; topGames.slice(0, 3).forEach((game, index) => { speech += `Game ${index + 1}: Game URL: https://lichess.org/${game.id} ${ game.white?.name ?? "Unknown" } (rating ${game.white?.rating ?? "N/A"}) versus ${ game.black?.name ?? "Unknown" } (rating ${game.black?.rating ?? "N/A"}), played in ${ game.month ?? "N/A" } ${game.year ?? "N/A"}. `; }); } return speech.trim(); };