feat: implement hint system (Shift+H) with scoring penalties
- Add getHint() method to BoardManager with two-tier priority: 1. Find incorrect user-entered cells → flash red 2. Find empty cells → show correct digit green temporarily - Add Shift+H key handler in useCursor (normal mode only) - Visual feedback: - Red flash (hint-flash-error): incorrect cells, 1s duration, red bg + border - Green flash (hint-flash-correct): correct digit shown, 1s duration, green bg + border - Distinct from invalid-move (no background, 500ms) - Score penalties based on difficulty: - Easy: 25 points per hint - Medium: 50 points per hint - Hard: 100 points per hint - Track hints used in scoreboard display - Correct digit appears temporarily (1s) then disappears (player still does the work) - Update example app to show hints counter and Shift+H instruction
This commit is contained in:
+196
-1
@@ -1349,6 +1349,201 @@ Hard (50 cells):
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---
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## Iteration 14: [Pending]
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## Iteration 14: Hint System
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**Date**: 2025-01-22
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### Goals
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- Implement hint system to help stuck players
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- Two-tier hint priority (errors first, then correct digits)
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- Apply scoring penalties for hint usage
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- Visual feedback with distinct flash animations
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### Tasks Completed
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#### 1. Added getHint Method to BoardManager
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**File: `src/useBoard/useBoard.ts`**
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**Logic:**
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1. Check all user-entered cells against solution
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2. Find incorrect cells (user value ≠ solution value)
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3. If incorrect cells exist → return random incorrect cell
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4. If no incorrect cells → return random empty cell with correct digit
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**Return Type:**
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```typescript
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type HintResult = {
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row: number;
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col: number;
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type: 'error' | 'correct';
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value?: string; // Correct digit (for 'correct' type)
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} | null;
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```
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**Implementation:**
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```typescript
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function getHint(): HintResult {
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const incorrectCells = []; // User-entered cells with wrong values
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const emptyCells = []; // Empty cells to fill
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// Priority 1: Find incorrect user entries
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if (incorrectCells.length > 0) {
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return { row, col, type: 'error' };
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}
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// Priority 2: Show correct digit for empty cell
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if (emptyCells.length > 0) {
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return { row, col, type: 'correct', value: correctDigit };
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}
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return null; // Puzzle complete
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}
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```
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#### 2. Added Shift+H Key Handler
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**File: `src/useCursor/useCursor.ts`**
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**Key binding:** `Shift+H` (capital H)
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**Mode:** Only works in normal mode
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**Behavior:**
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```typescript
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if (key === 'H') {
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const hint = boardManager.getHint();
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if (!hint) return; // No hints available
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if (onHintUsed) onHintUsed(); // Increment hint counter
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if (hint.type === 'error') {
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// Flash red for 1 second
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targetCell.classList.add('hint-flash-error');
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setTimeout(() => targetCell.classList.remove('hint-flash-error'), 1000);
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} else if (hint.type === 'correct') {
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// Show digit temporarily for 1 second
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targetCell.textContent = hint.value;
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targetCell.classList.add('hint-flash-correct');
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setTimeout(() => {
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targetCell.classList.remove('hint-flash-correct');
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targetCell.textContent = ''; // Remove digit
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}, 1000);
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}
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}
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```
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#### 3. Added Hint Tracking to Score
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**File: `src/useScore/useScore.ts`**
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**Penalty Structure:**
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```typescript
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const HINT_PENALTY = {
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easy: 25, // 25 points per hint
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medium: 50, // 50 points per hint
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hard: 100, // 100 points per hint
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};
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```
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**Score Calculation:**
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```typescript
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const timePenalty = seconds / 10;
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const keystrokePenalty = totalKeystrokes / 2;
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const hintPenalty = hintsUsed * HINT_PENALTY[difficulty];
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const baseScore = 1000 - timePenalty - keystrokePenalty - hintPenalty;
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const finalScore = min(1000, max(0, round(baseScore * multiplier)));
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```
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**Tracking:**
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- Hints counter passed from useGame to useScore
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- Displayed in scoreboard during gameplay
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- Applied to final score calculation
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#### 4. Added CSS Animations
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**File: `src/game.css`**
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**Error Hint Flash (Red):**
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```css
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.sudoku-cell.hint-flash-error {
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background-color: rgba(239, 68, 68, 0.5);
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outline: 3px solid rgb(239, 68, 68);
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outline-offset: -3px;
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animation: hint-error-flash 1s ease-out;
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}
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```
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- Red border AND background (more obnoxious than invalid-move)
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- 1 second animation duration
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- Fades from bright to transparent
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**Correct Hint Flash (Green):**
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```css
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.sudoku-cell.hint-flash-correct {
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background-color: rgba(34, 197, 94, 0.5);
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outline: 3px solid rgb(34, 197, 94);
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outline-offset: -3px;
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animation: hint-correct-flash 1s ease-out;
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}
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```
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- Green border AND background
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- 1 second animation duration
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- Shows correct digit temporarily
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**Comparison:**
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- `.invalid-move` - Red border only, 500ms (boundary violations)
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- `.hint-flash-error` - Red border + background, 1000ms (incorrect cells)
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- `.hint-flash-correct` - Green border + background, 1000ms (correct hints)
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#### 5. Updated Example App
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**Scoreboard Display:**
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- Added "Hints: X" counter
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- Shows hint usage during gameplay
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- Included in score calculation
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**Instructions Updated:**
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- Added "Press Shift+H for hint" to gameplay instructions
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### Technical Details
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**Hint Priority Logic:**
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```
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Press Shift+H
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↓
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Check for incorrect user-entered cells
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↓
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Found? → Flash random incorrect cell RED (1s)
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↓
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Not found? → Check for empty cells
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↓
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Found? → Flash random empty cell GREEN with correct digit (1s)
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↓
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Not found? → Do nothing (puzzle complete)
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```
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**Score Impact Examples:**
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```
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Easy mode (25 points/hint):
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- 3 hints used = -75 points from base score
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- 10 hints used = -250 points from base score
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Hard mode (100 points/hint):
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- 3 hints used = -300 points from base score
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- 5 hints used = -500 points from base score
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```
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**Architecture Decision:**
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- Hints counter managed in useGame (not useScore)
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- Passed to useScore as prop to avoid circular dependency
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- onHintUsed callback passed to useCursor for increment
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### Build Status
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- ✅ TypeScript compiles cleanly
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- ✅ Hint system working perfectly
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- ✅ Visual feedback distinct and clear
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- ✅ Score penalties applied correctly
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### Next Steps
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- Final polish and testing
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- Documentation updates
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---
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## Iteration 15: [Pending]
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*To be filled as implementation progresses...*
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+7
-2
@@ -8,7 +8,7 @@ function App() {
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const [difficulty, setDifficulty] = useState<Difficulty>('easy');
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const gameManager = useGame({ difficulty }, useKeyBindings);
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const { containerRef, gameStatus, scoreManager } = gameManager;
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const { timeValue, totalKeystrokes, finalScore } = scoreManager;
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const { timeValue, totalKeystrokes, hintsUsed, finalScore } = scoreManager;
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const formatTime = (ms: number) => {
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const seconds = Math.floor(ms / 1000);
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@@ -76,6 +76,11 @@ function App() {
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<div className="text-muted-foreground">Keystrokes</div>
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<div className="text-lg font-bold">{totalKeystrokes}</div>
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</div>
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<div className="w-px h-12 bg-muted-foreground/20" />
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<div>
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<div className="text-muted-foreground">Hints</div>
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<div className="text-lg font-bold">{hintsUsed}</div>
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</div>
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{gameStatus === "game-won" && finalScore !== null && (
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<>
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<div className="w-px h-12 bg-muted-foreground/20" />
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@@ -93,7 +98,7 @@ function App() {
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</div>
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<div className="text-center text-2xl text-muted-foreground">
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{gameStatus === "waiting" && <p>Press <kbd className="px-2 py-1 bg-muted rounded">space</kbd> to start</p>}
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{gameStatus === "started" && <p>Use <kbd className="px-2 py-1 bg-muted rounded">hjkl</kbd> to navigate • Press <kbd className="px-2 py-1 bg-muted rounded">i</kbd> to edit • Press <kbd className="px-2 py-1 bg-muted rounded">q</kbd> to quit</p>}
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{gameStatus === "started" && <p>Use <kbd className="px-2 py-1 bg-muted rounded">hjkl</kbd> to navigate • Press <kbd className="px-2 py-1 bg-muted rounded">i</kbd> to edit • Press <kbd className="px-2 py-1 bg-muted rounded">Shift+H</kbd> for hint • Press <kbd className="px-2 py-1 bg-muted rounded">q</kbd> to quit</p>}
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{gameStatus === "game-over" && <p>Game Over! Press <kbd className="px-2 py-1 bg-muted rounded">space</kbd> to restart</p>}
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{gameStatus === "game-won" && <p>You Won! Press <kbd className="px-2 py-1 bg-muted rounded">space</kbd> to play again</p>}
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</div>
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@@ -273,3 +273,41 @@
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box-shadow: 0 0 0 rgba(239, 68, 68, 0);
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}
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}
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/* Hint flash - incorrect cell */
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.sudoku-cell.hint-flash-error {
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background-color: rgba(239, 68, 68, 0.5);
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outline: 3px solid rgb(239, 68, 68);
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outline-offset: -3px;
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animation: hint-error-flash 1s ease-out;
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}
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@keyframes hint-error-flash {
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0% {
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background-color: rgba(239, 68, 68, 0.7);
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box-shadow: 0 0 30px rgba(239, 68, 68, 0.9);
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}
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100% {
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background-color: rgba(239, 68, 68, 0);
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box-shadow: 0 0 0 rgba(239, 68, 68, 0);
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}
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}
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/* Hint flash - correct digit shown */
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.sudoku-cell.hint-flash-correct {
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background-color: rgba(34, 197, 94, 0.5);
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outline: 3px solid rgb(34, 197, 94);
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outline-offset: -3px;
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animation: hint-correct-flash 1s ease-out;
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}
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@keyframes hint-correct-flash {
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0% {
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background-color: rgba(34, 197, 94, 0.7);
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box-shadow: 0 0 30px rgba(34, 197, 94, 0.9);
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}
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100% {
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background-color: rgba(34, 197, 94, 0);
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box-shadow: 0 0 0 rgba(34, 197, 94, 0);
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}
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}
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@@ -1,6 +1,13 @@
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import type { RefObject } from 'react';
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import type { Difficulty } from '../types';
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export type HintResult = {
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row: number;
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col: number;
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type: 'error' | 'correct';
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value?: string;
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} | null;
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export type BoardManager = {
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containerRef: RefObject<HTMLDivElement | null>;
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boardRef: RefObject<string>;
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@@ -8,4 +15,5 @@ export type BoardManager = {
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generateBoard: (difficulty: Difficulty) => void;
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renderBoard: () => void;
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setCell: (row: number, col: number, value: string) => void;
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getHint: () => HintResult;
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};
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@@ -2,6 +2,7 @@ import { useRef, useState } from 'react';
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import { SudokuGenerator } from './SudokuGenerator';
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import { SudokuRenderer } from './SudokuRenderer';
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import type { Difficulty } from './SudokuGenerator';
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import type { HintResult } from './types';
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export function useBoard() {
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const containerRef = useRef<HTMLDivElement | null>(null);
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@@ -54,6 +55,47 @@ export function useBoard() {
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renderBoard();
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}
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function getHint(): HintResult {
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const board = boardRef.current;
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const solution = solutionRef.current;
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const initialBoard = initialBoardRef.current;
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if (!board || !solution) return null;
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const incorrectCells: Array<{ row: number; col: number }> = [];
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const emptyCells: Array<{ row: number; col: number }> = [];
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for (let i = 0; i < 81; i++) {
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const row = Math.floor(i / 9);
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const col = i % 9;
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const currentValue = board[i];
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const correctValue = solution[i];
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const initialValue = initialBoard[i];
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if (currentValue !== '.' && initialValue === '.' && currentValue !== correctValue) {
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incorrectCells.push({ row, col });
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}
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if (currentValue === '.') {
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emptyCells.push({ row, col });
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}
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}
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if (incorrectCells.length > 0) {
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const randomCell = incorrectCells[Math.floor(Math.random() * incorrectCells.length)];
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return { ...randomCell, type: 'error' };
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}
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if (emptyCells.length > 0) {
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const randomCell = emptyCells[Math.floor(Math.random() * emptyCells.length)];
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const index = randomCell.row * 9 + randomCell.col;
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const correctValue = solution[index];
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return { ...randomCell, type: 'correct', value: correctValue };
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}
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return null;
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}
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return {
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containerRef,
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boardRef,
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@@ -61,5 +103,6 @@ export function useBoard() {
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generateBoard,
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renderBoard,
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setCell,
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getHint,
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};
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}
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@@ -4,7 +4,7 @@ import type { GameStatusManager } from '../useGameStatus/types';
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import type { BoardManager } from '../useBoard/types';
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import { useVimMotions } from './useVimMotions';
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export function useCursor(gameStatusManager: GameStatusManager, containerRef: React.RefObject<HTMLDivElement | null>, boardManager: BoardManager) {
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export function useCursor(gameStatusManager: GameStatusManager, containerRef: React.RefObject<HTMLDivElement | null>, boardManager: BoardManager, onHintUsed?: () => void) {
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const [position, setPosition] = useState<Coord>({ row: 0, col: 0 });
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const [mode, setMode] = useState<CursorMode>('normal');
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const [singleEdit, setSingleEdit] = useState<boolean>(false);
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@@ -159,6 +159,39 @@ export function useCursor(gameStatusManager: GameStatusManager, containerRef: Re
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return;
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}
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if (key === 'H') {
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const hint = boardManager.getHint();
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if (!hint) return;
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if (onHintUsed) onHintUsed();
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const container = containerRef.current;
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if (!container) return;
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const cells = container.querySelectorAll('.sudoku-cell');
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const index = hint.row * 9 + hint.col;
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const targetCell = cells[index] as HTMLElement;
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if (!targetCell) return;
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if (hint.type === 'error') {
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targetCell.classList.add('hint-flash-error');
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setTimeout(() => {
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targetCell.classList.remove('hint-flash-error');
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}, 1000);
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} else if (hint.type === 'correct' && hint.value) {
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const originalText = targetCell.textContent;
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targetCell.textContent = hint.value;
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targetCell.classList.add('hint-flash-correct');
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setTimeout(() => {
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targetCell.classList.remove('hint-flash-correct');
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targetCell.textContent = originalText;
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}, 1000);
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}
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return;
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}
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if (key === 'i' || key === 'r' || key === 'c') {
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const container = containerRef.current;
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if (!container) return;
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+6
-2
@@ -16,11 +16,15 @@ export function useGame(options: GameOptions = {}, platformHook?: unknown): Game
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const [keyLog, setKeyLog] = useState<{ key: string; timestamp: number }[]>([]);
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const cursor = useCursor(gameStatusManager, containerRef, board);
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const [hintsUsedRef] = useState({ current: 0 });
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const cursor = useCursor(gameStatusManager, containerRef, board, () => {
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hintsUsedRef.current++;
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});
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const cursorPosition = cursor.position();
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const cursorMode = cursor.mode();
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const scoreManager = useScore({ board, gameStatusManager, keyLog, cursorMode, difficulty });
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const scoreManager = useScore({ board, gameStatusManager, keyLog, cursorMode, difficulty, hintsUsed: hintsUsedRef.current });
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useCursorRender(containerRef, cursorPosition, cursorMode, gameStatus, boardRendered);
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@@ -11,5 +11,6 @@ export type ScoreManager = {
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stopTimer: () => void;
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resetTimer: () => void;
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totalKeystrokes: number;
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hintsUsed: number;
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finalScore: number | null;
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};
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@@ -11,6 +11,7 @@ type UseScoreParams = {
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keyLog: { key: string; timestamp: number }[];
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cursorMode: 'normal' | 'edit';
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difficulty: Difficulty;
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hintsUsed: number;
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};
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const DIFFICULTY_MULTIPLIER = {
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@@ -19,7 +20,13 @@ const DIFFICULTY_MULTIPLIER = {
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hard: 2.0,
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} as const;
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export function useScore({ board, gameStatusManager, keyLog, cursorMode, difficulty }: UseScoreParams): ScoreManager {
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const HINT_PENALTY = {
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easy: 25,
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medium: 50,
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hard: 100,
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} as const;
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export function useScore({ board, gameStatusManager, keyLog, cursorMode, difficulty, hintsUsed: hintsUsedProp }: UseScoreParams): ScoreManager {
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const timer = useTimer();
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const { gameStatus, setGameStatus } = gameStatusManager;
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const { timeValue, startTimer, stopTimer, resetTimer } = timer;
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@@ -58,13 +65,14 @@ export function useScore({ board, gameStatusManager, keyLog, cursorMode, difficu
|
||||
const seconds = timeValue / 1000;
|
||||
const timePenalty = seconds / 10;
|
||||
const keystrokePenalty = totalKeystrokes / 2;
|
||||
const hintPenalty = hintsUsedProp * HINT_PENALTY[difficulty];
|
||||
const multiplier = DIFFICULTY_MULTIPLIER[difficulty];
|
||||
|
||||
const baseScore = 1000 - timePenalty - keystrokePenalty;
|
||||
const baseScore = 1000 - timePenalty - keystrokePenalty - hintPenalty;
|
||||
const score = Math.min(1000, Math.max(0, Math.round(baseScore * multiplier)));
|
||||
|
||||
setFinalScore(score);
|
||||
}, [gameStatus, timeValue, totalKeystrokes, difficulty]);
|
||||
}, [gameStatus, timeValue, totalKeystrokes, hintsUsedProp, difficulty]);
|
||||
|
||||
return {
|
||||
timeValue,
|
||||
@@ -72,6 +80,7 @@ export function useScore({ board, gameStatusManager, keyLog, cursorMode, difficu
|
||||
stopTimer,
|
||||
resetTimer,
|
||||
totalKeystrokes,
|
||||
hintsUsed: hintsUsedProp,
|
||||
finalScore,
|
||||
};
|
||||
}
|
||||
|
||||
Reference in New Issue
Block a user