Snake/src/net/hoo2/auth/dsproject/snake/HeuristicPlayer.java

package net.hoo2.auth.dsproject.snake;

import java.util.*;

public class HeuristicPlayer
             extends Player {

   private ArrayList<Integer[]> path;

   public HeuristicPlayer() {
      super ();
      path = new ArrayList<Integer[]>();
   }
   HeuristicPlayer (int playerId, String name, Board board) {
      super (playerId, name, board);
      path = new ArrayList<Integer[]>();
   }


   @Override
   int dice () {
      return 1;
   }

   @Override
   int getNextMove (int tile) {
      Map<Integer, Double> moves = new HashMap<Integer, Double>();
      double max = Double.NEGATIVE_INFINITY;
      double ev  = Double.NEGATIVE_INFINITY;
      int   roll = 0;

      for (int r=1 ; r<=6 ; ++r) {
         moves.put (new Integer(r), evaluate (tile, r));
         if ((ev = moves.get(r)) > max) {
            max = ev;
            roll = r;
         }
      }
      Integer[] move_data = Arrays.stream(move (tile, roll, true))
                                  .boxed()
                                  .toArray(Integer[]::new);
      path.add(move_data);
      return tile + roll;
   }
   
   @Override
   void statistics (boolean verbose, boolean sum) {
      if (sum) {
         int nSnakes      =0;
         int nLadders     =0;
         int nRedApples   =0;
         int nBlackApples =0;
         
         for (int i=0 ; i<path.size() ; ++i) {
            nSnakes += path.get(i)[MOVE_SNAKES_IDX];
            nLadders+= path.get(i)[MOVE_LADDERS_IDX];
            nRedApples   += path.get(i)[MOVE_RED_APPLES_IDX];
            nBlackApples += path.get(i)[MOVE_BLACK_APPLES_IDX];
         }
         System.out.println("");
         System.out.println("*** Statistics for " + name + " ***");
         System.out.println("   Number of Snake bites       : " + nSnakes);
         System.out.println("   Number of Ladders used      : " + nLadders);
         System.out.println("   Number of Red Apples eaten  : " + nRedApples);
         System.out.println("   Number of Black Apples eaten: " + nBlackApples);
         
      }
      else
         super.statistics(verbose, sum);
   }

   
   
   private double evaluate (int tile, int roll) {
      int[] check = new int[MOVE_DATA_SIZE]; 
      check = move(tile, roll, false);
      
      return 0.65*check[MOVE_STEPS_IDX] + 0.35*check[MOVE_POINTS_IDX];
   }
}