refactor: separate score calculation from score management

BREAKING CHANGES:
- Remove timeLimit from GameOptions (use gameOver function instead)
- Remove finalScore from ScoreManager (pure data collection only)
- Remove rows/cols parameters from useScore
- Remove finalScore calculation logic from useScore hook

ADDITIONS:
- Create calculateMazeScore() utility function
- ScoreManager now only returns raw metrics: timeValue, keystrokes, optimalSteps, efficiency, distToKey, distToExit
- Score calculation moved to consumer (calculateMazeScore takes scoreManager + mazeSize)
- Example app now uses calculateMazeScore to compute final score on game-won

BENEFITS:
- ScoreManager is now a pure data collector with no side effects
- Scoring algorithm is reusable and testable in isolation
- Game-over conditions fully controlled via gameOver option
- Clear separation of concerns: collection vs calculation

example/src/App.tsx

@@ -1,6 +1,7 @@
-import { useGame, version } from "../../src";
+import { useGame, version, calculateMazeScore } from "../../src";
 import { useKeyBindings } from "./useKeyBindings";
 import { useIsMobile } from "./useIsMobile";
+import { useMemo } from "react";
 import '../../src/game.css';
 
 function App() {
@@ -10,7 +11,13 @@ function App() {
 
   const gameManager = useGame({ cols, rows }, useKeyBindings);
   const { containerRef, gameStatus, scoreManager } = gameManager;
-  const { timeValue, keystrokes, optimalSteps, efficiency, finalScore } = scoreManager;
+  const { timeValue, keystrokes, optimalSteps, efficiency } = scoreManager;
+
+  const mazeSize = rows * cols;
+  const finalScore = useMemo(
+    () => gameStatus === "game-won" ? calculateMazeScore(scoreManager, mazeSize) : null,
+    [gameStatus, scoreManager, mazeSize]
+  );
 
   const formatTime = (ms: number) => {
     const seconds = Math.floor(ms / 1000);

src/index.ts

@@ -2,6 +2,7 @@ export * from './types';
 export * from './useGame';
 export * from './useGameStatus';
 export { gameInfo } from './gameInfo';
+export { calculateMazeScore } from './useScore';
 import { version } from '../package.json';
 export type { GameInfo } from './gameInfo';
 export { version };

src/types.ts

@@ -11,7 +11,6 @@ export * from './useScore/types';
 export type GameOptions = {
   rows: number;
   cols: number;
-  timeLimit?: number;
   gameOver?: boolean | ((scoreManager: ScoreManager) => boolean);
 };
 

src/useGame.ts

@@ -6,7 +6,7 @@ import { useHeroRender } from './useCursor';
 import { useScore } from './useScore';
 
 export function useGame(options: GameOptions, platformHook?: unknown): GameManager {
-  const { cols, rows, timeLimit = 600, gameOver } = options;
+  const { cols, rows, gameOver } = options;
   const board = useBoard(cols, rows);
   const { containerRef, renderBoard } = board;
   const gameStatusManager = useGameStatus();
@@ -14,7 +14,7 @@ export function useGame(options: GameOptions, platformHook?: unknown): GameManag
   
   const hero = cursor.hero;
   const renderer = useHeroRender({ gameStatus: gameStatusManager.gameStatus, board, hero });
-  const scoreManager = useScore({ board, hero, gameStatusManager, keyManager, rows, cols, timeLimit, gameOver });
+  const scoreManager = useScore({ board, hero, gameStatusManager, keyManager, gameOver });
 
   const gameManager: GameManager = {
     containerRef,

src/useScore/calculateMazeScore.ts

@@ -0,0 +1,30 @@
+import type { ScoreManager } from './types';
+
+/**
+ * Calculate the final maze score based on performance metrics
+ * 
+ * Formula:
+ * Base Score = 1000 - (time penalty) - (keystroke penalty)
+ * Size Multiplier = max(1.0, (mazeSize) / 500)
+ * Final Score = min(1000, max(0, round(Base Score × Size Multiplier)))
+ * 
+ * Penalties:
+ * - Time Penalty = seconds / 10
+ * - Keystroke Penalty = keystrokes / 2
+ * 
+ * @param scoreManager - Current score metrics
+ * @param mazeSize - Total cells in maze (rows * cols)
+ * @returns Final score between 0-1000
+ */
+export function calculateMazeScore(scoreManager: ScoreManager, mazeSize: number): number {
+  const seconds = scoreManager.timeValue / 1000;
+  
+  const timePenalty = seconds / 10;
+  const keystrokePenalty = scoreManager.keystrokes / 2;
+  const sizeMultiplier = Math.max(1.0, mazeSize / 500);
+  
+  const baseScore = 1000 - timePenalty - keystrokePenalty;
+  const score = Math.min(1000, Math.max(0, Math.round(baseScore * sizeMultiplier)));
+
+  return score;
+}

src/useScore/index.ts

@@ -3,3 +3,4 @@ export * from './useScore';
 export * from './useScorePaths';
 export * from './useScoreTime';
 export * from './useTimer';
+export * from './calculateMazeScore';

src/useScore/types.ts

@@ -22,5 +22,4 @@ export type ScoreManager = {
   keystrokes: number;
   optimalSteps: number;
   efficiency: number;
-  finalScore: number | null;
 };

src/useScore/useScore.ts

@@ -1,4 +1,4 @@
-import { useEffect, useRef, useState } from "react";
+import { useEffect, useRef } from "react";
 import { useTimer } from "./useTimer";
 import { useScoreTime } from "./useScoreTime";
 import { useScorePaths } from "./useScorePaths";
@@ -12,13 +12,10 @@ type UseScoreParams = {
   hero: UseHeroType;
   gameStatusManager: GameStatusManager;
   keyManager?: { keyLog: any[] };
-  rows: number;
-  cols: number;
-  timeLimit: number;
   gameOver?: boolean | ((scoreManager: ScoreManager) => boolean);
 };
 
-export function useScore({ board, hero, gameStatusManager, keyManager, rows, cols, timeLimit, gameOver }: UseScoreParams) {
+export function useScore({ board, hero, gameStatusManager, keyManager, gameOver }: UseScoreParams) {
   const timer = useTimer();
   const { gameStatus, setGameStatus } = gameStatusManager;
   const { timeValue, startTimer, stopTimer, resetTimer } = timer;
@@ -33,7 +30,6 @@ export function useScore({ board, hero, gameStatusManager, keyManager, rows, col
   const distToKey = entranceToKey || heroToKey;
   const distToExit = entranceToExit || heroToExit;
 
-  const [finalScore, setFinalScore] = useState<number | null>(null);
   const optimalRef = useRef<number>(0);
   const keystrokes = keyManager ? keyManager.keyLog.length : 0;
 
@@ -56,16 +52,6 @@ export function useScore({ board, hero, gameStatusManager, keyManager, rows, col
   const optimalSteps = optimalRef.current;
   const efficiency = optimalSteps > 0 ? Math.round((keystrokes / optimalSteps) * 100) : 0;
 
-  useEffect(() => {
-    if (gameStatus !== "started" && gameStatus !== "has-key") return;
-
-    const timeLimitMs = timeLimit * 1000;
-    if (timeValue >= timeLimitMs) {
-      setGameStatus("game-over");
-      return;
-    }
-  }, [gameStatus, timeValue, timeLimit, setGameStatus]);
-
   // Check custom gameOver condition if provided
   useEffect(() => {
     if (gameStatus !== "started" && gameStatus !== "has-key") return;
@@ -81,30 +67,13 @@ export function useScore({ board, hero, gameStatusManager, keyManager, rows, col
       keystrokes,
       optimalSteps,
       efficiency,
-      finalScore,
     };
 
     const shouldGameOver = typeof gameOver === "function" ? gameOver(scoreManager) : gameOver;
     if (shouldGameOver) {
       setGameStatus("game-over");
     }
-  }, [gameStatus, gameOver, timeValue, keystrokes, optimalSteps, efficiency, distToKey, distToExit, startTimer, stopTimer, resetTimer, finalScore, setGameStatus]);
-
-  useEffect(() => {
-    if (gameStatus !== "game-won") return;
-
-    const seconds = timeValue / 1000;
-    const mazeSize = rows * cols;
-    
-    const timePenalty = seconds / 10;
-    const keystrokePenalty = keystrokes / 2;
-    const sizeMultiplier = Math.max(1.0, mazeSize / 500);
-    
-    const baseScore = 1000 - timePenalty - keystrokePenalty;
-    const score = Math.min(1000, Math.max(0, Math.round(baseScore * sizeMultiplier)));
-
-    setFinalScore(score);
-  }, [gameStatus, timeValue, keystrokes, rows, cols]);
+  }, [gameStatus, gameOver, timeValue, keystrokes, optimalSteps, efficiency, distToKey, distToExit, startTimer, stopTimer, resetTimer, setGameStatus]);
 
    return {
      timeValue,
@@ -116,6 +85,5 @@ export function useScore({ board, hero, gameStatusManager, keyManager, rows, col
      keystrokes,
      optimalSteps,
      efficiency,
-     finalScore,
    };
 }