Added bool trapped

src/SuperSnakeBot.java

@@ -1,8 +1,10 @@
+import java.util.Random;
+
 public class SuperSnakeBot extends Bot{
     private String moves = "";
     private char previousTurn = '<';
-    boolean frontIsBlocked, leftIsBlocked, rightIsBlocked;
-    private int spiralNumber = 0;
+    boolean frontIsBlocked, backIsBlocked, leftIsBlocked, rightIsBlocked, trapped;
+    private int spiralFactor = 1;
     private char spiralDirection = '>';
     private boolean goesForward = true;
     public static void main(String[] args) {
@@ -18,36 +20,50 @@ public class SuperSnakeBot extends Bot{
         boolean stoneDetected = view.data.contains("@");
         char nextMove;
 
-        nextMove = stoneDetected ? goToStone(view) : walkByColumns(view);
         checkBarriers(view);
+
+        nextMove = stoneDetected ? goToStone(view) : walkBySpiral(view);
+
         nextMove = checkMove(nextMove);
 
         saveMove(nextMove);
         return nextMove;
     }
 
-    private void checkBarriers(View view) {
+    private void checkBarriers(View view) throws Exception {
         int centerCoordinates = view.width / 2;
         int centerIndex = getCharIndexFromCoordinates(view.width, centerCoordinates, centerCoordinates);
 
         int frontIndex = getCharIndexFromCoordinates(view.width, centerCoordinates, centerCoordinates - 1);
+        int backIndex = getCharIndexFromCoordinates(view.width, centerCoordinates, centerCoordinates + 1);
         int leftIndex = centerIndex - 1;
         int rightIndex = centerIndex + 1;
 
         frontIsBlocked = view.data.charAt(frontIndex) == '*';
+        backIsBlocked = view.data.charAt(backIndex) == '*';
         leftIsBlocked = view.data.charAt(leftIndex) == '*';
         rightIsBlocked = view.data.charAt(rightIndex) == '*';
+        trapped = frontIsBlocked && backIsBlocked && leftIsBlocked && rightIsBlocked;
+
+        if (trapped) {
+            Exception trappedException = new Exception("Snake is trapped");
+            System.err.println(trappedException.getMessage());
+            throw trappedException;
+        }
     }
 
     private char checkMove(char move) throws Exception {
-        if(move == '^' && frontIsBlocked){
+        if (frontIsBlocked) {
             resetMovesSequence();
-
-            if(leftIsBlocked) move = '>';
-            else if(rightIsBlocked) move = '<';
-            else if(previousTurn == '<') move = '>';
-            else if(previousTurn == '>') move = '<';
-            else throw new Exception();
+            if (leftIsBlocked) move = '>';
+            else if (rightIsBlocked) move = '<';
+            else if (previousTurn == '<') move = '>';
+            else if (previousTurn == '>') move = '<';
+            else {
+                Exception invalidTurnException = new Exception("The previous turn was neither '<' nor '>'.");
+                System.err.println(invalidTurnException.getMessage());
+                throw invalidTurnException;
+            }
         }
         return move;
     }
@@ -60,8 +76,8 @@ public class SuperSnakeBot extends Bot{
 
     private char walkBySpiral(View view) {
         if (moves.isEmpty()) {
-            spiralNumber++;
-            moves += "^".repeat(view.width * spiralNumber) + spiralDirection + "^".repeat(view.width * spiralNumber) + spiralDirection;
+            spiralFactor++;
+            moves += "^".repeat(view.width * spiralFactor) + spiralDirection + "^".repeat(view.width * spiralFactor) + spiralDirection;
         }
         char nextMove = moves.charAt(0);
         moves = moves.substring(1);
@@ -70,7 +86,12 @@ public class SuperSnakeBot extends Bot{
 
     private char walkByColumns(View view) {
         if(moves.isEmpty()){
-            int steps = 32 - view.width;
+            int min = 10;
+            int max = 100;
+
+            Random random = new Random();
+            int steps = random.nextInt((max - min) + 1) + min;
+            //int steps = 32 - view.width;
 
             moves = "^".repeat(steps);
             moves += (goesForward ? ">" + "^".repeat(view.width) + ">" : "<" + "^".repeat(view.width) + "<");
@@ -89,15 +110,15 @@ public class SuperSnakeBot extends Bot{
         int[] rightIndexes = getRightIndexes(view);
 
         for (int index : frontIndexes) {
-            if (view.data.charAt(index) == '@') return '^';
+            if (view.data.charAt(index) == '@' && view.data.charAt(index + view.width) != '*' && !frontIsBlocked) return '^';
         }
 
         for (int index : leftIndexes) {
-            if (view.data.charAt(index) == '@') return '<';
+            if (view.data.charAt(index) == '@' && view.data.charAt(index + 1) != '*' && !leftIsBlocked) return '<';
         }
 
         for (int index : rightIndexes) {
-            if (view.data.charAt(index) == '@') return '>';
+            if (view.data.charAt(index) == '@' && view.data.charAt(index - 1) != '*' && !rightIsBlocked) return '>';
         }
 
         return '^';
@@ -145,7 +166,8 @@ public class SuperSnakeBot extends Bot{
 
     private void resetMovesSequence() {
         moves = "";
-        spiralNumber = 0;
+        System.out.println("Previous spiralNumber: " + spiralFactor + ". Resetting.");
+        spiralFactor = 1;
         spiralDirection = (spiralDirection == '>') ? '<' : '>';
         goesForward = true;
     }