From 0bb56537599048966ab067fa7130755b6135c842 Mon Sep 17 00:00:00 2001
From: "gpt-engineer-app[bot]"
 <159125892+gpt-engineer-app[bot]@users.noreply.github.com>
Date: Fri, 22 Aug 2025 17:30:30 +0000
Subject: [PATCH] Refine parity bits identification

Update parity bits interactive to highlight flipped bit location in green, display row/column parity ("odd" in red), and briefly highlight all black cells upon clicking "Identify Flip".
---
 src/components/ParityBitsGame.tsx | 202 +++++++++++++++++++++++-------
 1 file changed, 154 insertions(+), 48 deletions(-)

diff --git a/src/components/ParityBitsGame.tsx b/src/components/ParityBitsGame.tsx
index 322d10c..8da54fb 100644
--- a/src/components/ParityBitsGame.tsx
+++ b/src/components/ParityBitsGame.tsx
@@ -19,6 +19,23 @@ const ParityBitsGame = ({ showSocialShare = true }: ParityBitsGameProps) => {
   const [flippedCell, setFlippedCell] = useState<{row: number, col: number} | null>(null);
   const [errorDetected, setErrorDetected] = useState<{row: number, col: number} | null>(null);
   const [phase, setPhase] = useState<'setup' | 'parity' | 'flip' | 'detect'>('setup');
+  const [animationState, setAnimationState] = useState<{
+    isAnimating: boolean;
+    currentRow: number;
+    currentCol: number;
+    showRowParity: boolean;
+    showColParity: boolean;
+    rowParities: boolean[];
+    colParities: boolean[];
+  }>({
+    isAnimating: false,
+    currentRow: -1,
+    currentCol: -1,
+    showRowParity: false,
+    showColParity: false,
+    rowParities: [],
+    colParities: []
+  });
 
   // Reset game when grid size changes
   const handleGridSizeChange = useCallback((newSize: number[]) => {
@@ -89,34 +106,74 @@ const ParityBitsGame = ({ showSocialShare = true }: ParityBitsGameProps) => {
     setPhase('flip');
   };
 
-  // Identify the flipped bit using parity check
-  const identifyFlip = () => {
+  // Identify the flipped bit using parity check with animation
+  const identifyFlip = async () => {
     if (!parityBitsAdded) return;
     
-    let errorRow = -1;
-    let errorCol = -1;
+    // Calculate all parities first
+    const rowParities: boolean[] = [];
+    const colParities: boolean[] = [];
     
-    // Check row parities
     for (let i = 0; i < gridSize; i++) {
       const rowBits = parityGrid[i].slice(0, gridSize);
       const expectedParity = calculateParity(rowBits);
-      if (expectedParity !== parityGrid[i][gridSize]) {
-        errorRow = i;
-      }
+      rowParities[i] = expectedParity !== parityGrid[i][gridSize];
     }
     
-    // Check column parities  
     for (let j = 0; j < gridSize; j++) {
       const colBits = parityGrid.slice(0, gridSize).map(row => row[j]);
       const expectedParity = calculateParity(colBits);
-      if (expectedParity !== parityGrid[gridSize][j]) {
-        errorCol = j;
-      }
+      colParities[j] = expectedParity !== parityGrid[gridSize][j];
     }
     
+    setAnimationState({
+      isAnimating: true,
+      currentRow: -1,
+      currentCol: -1,
+      showRowParity: false,
+      showColParity: false,
+      rowParities,
+      colParities
+    });
+    
+    // Animate through rows
+    for (let i = 0; i < gridSize; i++) {
+      setAnimationState(prev => ({...prev, currentRow: i}));
+      await new Promise(resolve => setTimeout(resolve, 800));
+    }
+    
+    // Show row parities
+    setAnimationState(prev => ({...prev, currentRow: -1, showRowParity: true}));
+    await new Promise(resolve => setTimeout(resolve, 1000));
+    
+    // Animate through columns
+    for (let j = 0; j < gridSize; j++) {
+      setAnimationState(prev => ({...prev, currentCol: j}));
+      await new Promise(resolve => setTimeout(resolve, 800));
+    }
+    
+    // Show column parities
+    setAnimationState(prev => ({...prev, currentCol: -1, showColParity: true}));
+    await new Promise(resolve => setTimeout(resolve, 1000));
+    
+    // Find and highlight the error
+    const errorRow = rowParities.findIndex(parity => parity);
+    const errorCol = colParities.findIndex(parity => parity);
+    
     if (errorRow >= 0 && errorCol >= 0) {
       setErrorDetected({row: errorRow, col: errorCol});
     }
+    
+    setAnimationState({
+      isAnimating: false,
+      currentRow: -1,
+      currentCol: -1,
+      showRowParity: false,
+      showColParity: false,
+      rowParities: [],
+      colParities: []
+    });
+    
     setPhase('detect');
   };
 
@@ -128,6 +185,15 @@ const ParityBitsGame = ({ showSocialShare = true }: ParityBitsGameProps) => {
     setFlippedCell(null);
     setErrorDetected(null);
     setPhase('setup');
+    setAnimationState({
+      isAnimating: false,
+      currentRow: -1,
+      currentCol: -1,
+      showRowParity: false,
+      showColParity: false,
+      rowParities: [],
+      colParities: []
+    });
   };
 
   const renderGrid = () => {
@@ -135,37 +201,77 @@ const ParityBitsGame = ({ showSocialShare = true }: ParityBitsGameProps) => {
     const size = parityBitsAdded ? gridSize + 1 : gridSize;
     
     return (
-      <div className="grid gap-1 justify-center" style={{gridTemplateColumns: `repeat(${size}, 1fr)`}}>
-        {Array(size).fill(null).map((_, row) =>
-          Array(size).fill(null).map((_, col) => {
-            const isParityCell = parityBitsAdded && (row === gridSize || col === gridSize);
-            const isFlipped = flippedCell?.row === row && flippedCell?.col === col;
-            const isError = errorDetected?.row === row && errorDetected?.col === col;
-            const isErrorRow = errorDetected && row === errorDetected.row;
-            const isErrorCol = errorDetected && col === errorDetected.col;
-            
-            return (
-              <button
-                key={`${row}-${col}`}
-                className={`
-                  w-12 h-12 border-2 transition-all duration-200
-                  ${currentGrid[row]?.[col] ? 'bg-foreground' : 'bg-background'}
-                  ${isParityCell ? 'border-primary' : 'border-foreground'}
-                  ${isFlipped ? 'ring-4 ring-destructive' : ''}
-                  ${isError ? 'ring-4 ring-destructive bg-destructive/20' : ''}
-                  ${isErrorRow || isErrorCol ? 'ring-2 ring-warning' : ''}
-                  ${phase === 'setup' && !isParityCell ? 'hover:bg-accent cursor-pointer' : ''}
-                  ${phase === 'parity' && !isParityCell ? 'hover:bg-accent cursor-pointer' : ''}
-                  ${isParityCell ? 'cursor-not-allowed' : ''}
-                `}
-                onClick={() => {
-                  if (phase === 'setup') toggleCell(row, col);
-                  else if (phase === 'parity') flipBit(row, col);
-                }}
-                disabled={isParityCell}
-              />
-            );
-          })
+      <div className="flex flex-col items-center gap-2">
+        {/* Main grid with row labels */}
+        <div className="flex items-center gap-2">
+          <div className="grid gap-1" style={{gridTemplateColumns: `repeat(${size}, 1fr)`}}>
+            {Array(size).fill(null).map((_, row) =>
+              Array(size).fill(null).map((_, col) => {
+                const isParityCell = parityBitsAdded && (row === gridSize || col === gridSize);
+                const isFlipped = flippedCell?.row === row && flippedCell?.col === col;
+                const isError = errorDetected?.row === row && errorDetected?.col === col;
+                const isCurrentRowBeingChecked = animationState.currentRow === row && !isParityCell;
+                const isCurrentColBeingChecked = animationState.currentCol === col && !isParityCell;
+                const shouldHighlightForAnimation = (isCurrentRowBeingChecked || isCurrentColBeingChecked) && currentGrid[row]?.[col];
+                
+                return (
+                  <button
+                    key={`${row}-${col}`}
+                    className={`
+                      w-12 h-12 border-2 transition-all duration-200
+                      ${currentGrid[row]?.[col] ? 'bg-foreground' : 'bg-background'}
+                      ${isParityCell ? 'border-primary' : 'border-foreground'}
+                      ${isFlipped ? 'ring-4 ring-destructive' : ''}
+                      ${isError ? 'ring-4 ring-green-500 bg-green-500/20' : ''}
+                      ${shouldHighlightForAnimation ? 'ring-4 ring-yellow-400 bg-yellow-400/30' : ''}
+                      ${phase === 'setup' && !isParityCell ? 'hover:bg-accent cursor-pointer' : ''}
+                      ${phase === 'parity' && !isParityCell ? 'hover:bg-accent cursor-pointer' : ''}
+                      ${isParityCell ? 'cursor-not-allowed' : ''}
+                    `}
+                    onClick={() => {
+                      if (phase === 'setup') toggleCell(row, col);
+                      else if (phase === 'parity') flipBit(row, col);
+                    }}
+                    disabled={isParityCell}
+                  />
+                );
+              })
+            )}
+          </div>
+          
+          {/* Row parity labels */}
+          {(animationState.showRowParity || animationState.isAnimating) && (
+            <div className="flex flex-col gap-1">
+              {Array(gridSize).fill(null).map((_, row) => {
+                const hasOddParity = animationState.rowParities[row];
+                return (
+                  <div key={`row-${row}`} className="w-12 h-12 flex items-center justify-center">
+                    <span className={`text-xs font-medium ${hasOddParity ? 'text-red-500' : 'text-foreground'}`}>
+                      {hasOddParity ? 'odd' : 'even'}
+                    </span>
+                  </div>
+                );
+              })}
+              <div className="w-12 h-12"></div> {/* Empty space for parity cell */}
+            </div>
+          )}
+        </div>
+        
+        {/* Column parity labels */}
+        {(animationState.showColParity || animationState.isAnimating) && (
+          <div className="flex gap-1">
+            {Array(gridSize).fill(null).map((_, col) => {
+              const hasOddParity = animationState.colParities[col];
+              return (
+                <div key={`col-${col}`} className="w-12 h-6 flex items-center justify-center">
+                  <span className={`text-xs font-medium ${hasOddParity ? 'text-red-500' : 'text-foreground'}`}>
+                    {hasOddParity ? 'odd' : 'even'}
+                  </span>
+                </div>
+              );
+            })}
+            <div className="w-12 h-6"></div> {/* Empty space for parity cell */}
+          </div>
         )}
       </div>
     );
@@ -187,7 +293,7 @@ const ParityBitsGame = ({ showSocialShare = true }: ParityBitsGameProps) => {
               {phase === 'setup' && 'Set your grid by clicking squares to make them black. Then add parity bits.'}
               {phase === 'parity' && 'Parity bits added! Now flip exactly one bit in the main grid (not parity cells).'}
               {phase === 'flip' && 'Bit flipped! Click "Identify Flip" to see error detection in action.'}
-              {phase === 'detect' && 'Error detected! The highlighted cell shows where the bit was flipped.'}
+              {phase === 'detect' && 'Animation complete! Rows and columns with odd parity were highlighted, revealing the error location in green.'}
             </AlertDescription>
           </Alert>
 
@@ -220,10 +326,10 @@ const ParityBitsGame = ({ showSocialShare = true }: ParityBitsGameProps) => {
               
               <Button 
                 onClick={identifyFlip}
-                disabled={phase !== 'flip'}
+                disabled={phase !== 'flip' || animationState.isAnimating}
                 variant={phase === 'flip' ? 'default' : 'outline'}
               >
-                Identify Flip
+                {animationState.isAnimating ? 'Checking...' : 'Identify Flip'}
               </Button>
               
               <Button 
@@ -253,8 +359,8 @@ const ParityBitsGame = ({ showSocialShare = true }: ParityBitsGameProps) => {
                 </p>
               )}
               {errorDetected && (
-                <p className="text-sm text-destructive font-medium">
-                  Error detected at position ({errorDetected.row + 1}, {errorDetected.col + 1})!
+                <p className="text-sm text-green-600 font-medium">
+                  Error detected at position ({errorDetected.row + 1}, {errorDetected.col + 1}) - highlighted in green!
                 </p>
               )}
             </div>