import TreePackage.DecisionTreeInterface;
import TreePackage.DecisionTree;
/**
   A program that plays a guessing game using yes or no questions.
 
   @author Frank M. Carrano
   @author Timothy M. Henry
   @version 4.0
*/
public class GuessingGame
{
   private DecisionTreeInterface<String> tree;
   
   public GuessingGame(String question, String noAnswer, String yesAnswer)
   {
      DecisionTree<String> no = new DecisionTree<>(noAnswer);
      DecisionTree<String> yes = new DecisionTree<>(yesAnswer);
      tree = new DecisionTree<>(question, no, yes);
   } // end default constructor

   public void play()
   {
      tree.reset(); // Initialize current node to root
      while (!tree.isAnswer())
      {
         // Ask current question
         System.out.println(tree.getCurrentData());
         if (Client.isUserResponseYes())
            tree.advanceToYes();
         else
            tree.advanceToNo();
      } // end while
      assert tree.isAnswer(); // Assertion: Leaf is reached

      // Make guess
      System.out.println("My guess is " + tree.getCurrentData() +
                         ". Am I right?");
      if (Client.isUserResponseYes())
         System.out.println("I win.");
      else
         learn();
   } // end play

   private void learn()
   {
/*    < Implementation left as a project in the next chapter. >
      . . . */
   } // end learn
} // end GuessingGame