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@@ -0,0 +1,115 @@ |
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public class SuperSnakeBot extends Bot{ |
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private String moves = ""; |
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private char previousTurn = '<'; |
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boolean frontIsBlocked; |
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boolean leftIsBlocked; |
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boolean rightIsBlocked; |
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private int spiralNumber = 0; |
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private boolean goesForward = true; |
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public static void main(String[] args) { |
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Bot superSnakeBot = new SuperSnakeBot(args); |
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superSnakeBot.run(); |
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} |
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protected SuperSnakeBot(String[] args) { |
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super(args); |
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} |
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protected char nextMove(View view) throws Exception { |
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boolean stoneDetected = view.data.contains("@"); |
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char nextMove; |
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nextMove = stoneDetected ? goToStone(view) : walkByColumns(view); |
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checkBarriers(view); |
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nextMove = checkMove(nextMove); |
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saveMove(nextMove); |
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return nextMove; |
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} |
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private void checkBarriers(View view){ |
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int centerCoordinates = view.width / 2; |
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int frontIndex = getCharIndexFromCoordinates(view.width, centerCoordinates, centerCoordinates - 1); |
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int leftIndex = getCharIndexFromCoordinates(view.width, centerCoordinates - 1 , centerCoordinates); |
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int rightIndex = getCharIndexFromCoordinates(view.width, centerCoordinates + 1, centerCoordinates); |
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frontIsBlocked = view.data.charAt(frontIndex) == '*'; |
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leftIsBlocked = view.data.charAt(leftIndex) == '*'; |
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rightIsBlocked = view.data.charAt(rightIndex) == '*'; |
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} |
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private char checkMove(char move) throws Exception { |
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if(move == '^' && frontIsBlocked){ |
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resetMoves(); |
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if(leftIsBlocked) move = '>'; |
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else if(rightIsBlocked) move = '<'; |
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else if(previousTurn == '<') move = '>'; |
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else if(previousTurn == '>') move = '<'; |
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else throw new Exception(); |
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} |
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return move; |
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} |
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private void saveMove(char move){ |
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if(move == '<' || move == '>'){ |
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previousTurn = move; |
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} |
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} |
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private char walkBySpiral(View view) { |
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if (moves.isEmpty()) { |
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spiralNumber++; |
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moves += "^".repeat(view.width * spiralNumber) + ">" + "^".repeat(view.width * spiralNumber) + ">"; |
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} |
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char nextMove = moves.charAt(0); |
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moves = moves.substring(1); |
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return nextMove; |
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} |
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private char walkByColumns(View view) { |
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if(moves.isEmpty()){ |
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moves = "^".repeat(28); |
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moves += (goesForward ? ">" + "^".repeat(view.width) + ">" : "<" + "^".repeat(view.width) + "<"); |
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goesForward = !goesForward; |
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} |
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char nextMove = moves.charAt(0); |
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moves = moves.substring(1); |
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return nextMove; |
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} |
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private char goToStone(View view) { |
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resetMoves(); |
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int centerCoordinates = view.width / 2; |
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int leftIndex = getCharIndexFromCoordinates(view.width, centerCoordinates - 1, centerCoordinates); |
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int farLeftIndex = getCharIndexFromCoordinates(view.width, centerCoordinates - 2, centerCoordinates); |
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int rightIndex = getCharIndexFromCoordinates(view.width, centerCoordinates + 1, centerCoordinates); |
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int farRightIndex = getCharIndexFromCoordinates(view.width, centerCoordinates + 2, centerCoordinates); |
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int frontIndex = getCharIndexFromCoordinates(view.width, centerCoordinates, centerCoordinates - 1); |
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int farFrontIndex = getCharIndexFromCoordinates(view.width, centerCoordinates, centerCoordinates - 2); |
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if(view.data.charAt(frontIndex) == '@' || view.data.charAt(farFrontIndex) == '@'){ |
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return '^'; |
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}else if(view.data.charAt(leftIndex) == '@' || view.data.charAt(farLeftIndex) == '@'){ |
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return '<'; |
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}else if(view.data.charAt(rightIndex) == '@' || view.data.charAt(farRightIndex) == '@'){ |
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return '>'; |
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}else { |
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return '^'; |
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} |
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} |
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private int getCharIndexFromCoordinates(int width, int x, int y){ |
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return width * y + x; |
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} |
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private void resetMoves() { |
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moves = ""; |
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spiralNumber = 0; |
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goesForward = true; |
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} |
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} |