new comments + valid piece moves only

src/backend/Board.java

@@ -9,12 +9,15 @@ public class Board {
 	private int [] selectedPosition = null; // No piece selected initially
 	private int turnNumber=0; // Tracks the number of turns elapsed
 	private boolean turnWhite=true; // True if it's White's turn, False if it's Black's turn
-	private ArrayList<int[]> highlightedPositions = new ArrayList<>();//this list contain all the board positions
+	private ArrayList<int[]> highlightedPositions = new ArrayList<>();// List containing all board positions
+	
 	private boolean inBounds(int x, int y) {
+		// Verify the bounds of the board
 	    return x >= 0 && y >= 0 && x < col && y < line;
 	}
 
 	private boolean hasEnemy(int x, int y, boolean isWhite) {
+		// Detect an enemy piece, meaning from a different color
 	    return board[y][x] != null && board[y][x].isWhite() != isWhite;
 	}
 
@@ -84,7 +87,7 @@ public class Board {
 		            PieceType.Knight, PieceType.Rook
 		        };
 		 
-		// place black pieces (false = black)
+		// Place black pieces (false = black)
 		for (int x=0;x<8;x++) {
 			// Row 0: black major pieces
 			setPiece(false,backRow[x],x,0);
@@ -102,7 +105,7 @@ public class Board {
 	}
 
 	public void cleanBoard() {
-		// removes all pieces from the board, readying it to add pieces for a new game 
+		// Removes all pieces from the board, readying it to add pieces for a new game 
 		 // Iterate over each row and column and set the board position to null
         for (int y = 0; y < line; y++) {
             for (int x = 0; x < col; x++) {
@@ -175,11 +178,23 @@ public class Board {
 		      
 		      // If a piece is selected and the user clicks a new position
 		      else {
-		    	  movePiece(selectedX,selectedY,x,y);
-		    	  // Update turn
-			      this.turnNumber++;
-			      this.turnWhite=!this.turnWhite; 
-			    	
+		    	// Check if the move is valid by checking if it exists in highlightedPositions
+		            boolean isValidMove = false;
+		            for (int[] pos : highlightedPositions) {
+		                if (pos[0] == x && pos[1] == y) {
+		                    isValidMove = true;
+		                    break;
+		                }
+		            }
+		            
+		            // Only move the piece if the destination is valid
+		            if (isValidMove) {
+		                movePiece(selectedX, selectedY, x, y);
+		                // Update turn
+		                this.turnNumber++;
+		                this.turnWhite = !this.turnWhite;
+		            }
+		    	 
 			      // Deselect the position after moving
 			      this.selectedPosition = null;
 			      highlightedPositions.clear();//Clear after move
@@ -280,6 +295,7 @@ public class Board {
 	/* The following methods require more work ! */
 
 	public boolean isHighlighted(int x, int y) {
+		// Storing valid moves when piece is selected
 		for (int[] pos : highlightedPositions) {
 			if (pos[0] == x && pos[1] == y)
 				return true;