ai but can't make it work well

src/backend/AutoPlayer.java

@@ -10,7 +10,7 @@ public class AutoPlayer {
         ArrayList<Move> possibleMoves = new ArrayList<>();
 
         for (Piece piece : board.getPieces()) {
-        	if (piece.isWhite() != board.isTurnWhite()) continue;
+            if (piece.isWhite() != board.isTurnWhite()) continue;
 
             int originX = piece.getX();
             int originY = piece.getY();
@@ -31,5 +31,14 @@ public class AutoPlayer {
         if (possibleMoves.isEmpty()) return null;
         return possibleMoves.get(random.nextInt(possibleMoves.size()));
     }
-    
-}
+
+    public void playBestMove(Board board) {
+        Move bestMove = computeBestMove(board);
+        if (bestMove != null) {
+            board.playMove(bestMove);
+            board.incrementTurn();
+        }
+    }
+}
+
+

src/backend/Board.java

@@ -214,7 +214,7 @@ public class Board {
 	        
 	        // Reset selection and switch turn
 	        selectedCell = null;
-	        turnNumber++;
+	        turnNumber=turnNumber+1;
 	        System.out.println(this);
 
 
@@ -437,7 +437,27 @@ public class Board {
 	    }
 	}
 
-	
+	// In Board.java
+
+	public void activateSelection(int x, int y) {
+	    if (cells[x][y] != null && cells[x][y].isWhite() == isTurnWhite()) {
+	        selectedCell = cells[x][y];
+	    } else {
+	        selectedCell = null;
+	    }
+	}
+
+	public boolean isValidDestination(int x, int y) {
+	    return isHighlighted(x, y);
+	}
+
+	public Piece getPieceAt(int x, int y) {
+	    if (x >= 0 && x < cNum && y >= 0 && y < lNum) {
+	        return cells[x][y];
+	    }
+	    return null;
+	}
+
 	public void playMove(Move move) {
 		
 	    int fromX = move.getFromX();
@@ -494,6 +514,11 @@ public class Board {
 	    System.out.println(this);
 
 	}
+	
+	public void incrementTurn() {
+	    turnNumber++;
+	}
+
 	public boolean hasPiece(int x, int y) {
 	    return cells[x][y] != null;
 	}