// A program to play a simple game of prediction.
// Raja Sooriamurthi

import sraja.lib.java.*;

class MR {

  private static final int MAX = 25;

  // setup a memory to keep track of past performance
  Memory mem = new Memory ();
  // the shift buffer keeps track of the immediate last 4 guesses
  ShiftBuffer sb = new ShiftBuffer (4);

  // *************************
  // play
  // *************************

    public void play (Applet apl) {

      char guess, prediction;
      int right = 0, wrong = 0;

      do {
        Stdio.println();
        Stdio.println ("Guess head or tails and i'll predict your guess.");
        // 1. make a predictions
        prediction = mem.retrieve(sb);
        // 2. retrieve a guess
        guess = Stdio.readChar ("What is your guess [h/t] ? ");
        // 3. check
        if (guess == prediction) 
          {
            Stdio.println ("Yes!. I too predicted " + prediction);
            right++;
          } else {
            Stdio.println ("No. I predicted " + prediction);
            wrong++;
          }
        // 4. store i back in memory
        mem.store (sb, guess);
        // 5. incorporate the new guess into the short term memory
        sb.shift (guess);
        Stdio.println ("Score = " + right + " | " + wrong);
      } while ((right < MAX) && (wrong < MAX));

      // print the final outcome
      Stdio.println();
      Stdio.println("Final tally = " + right + " | " + wrong);

      Stdio.println ((right > wrong) ? 
                     "I out guessed you" 
                     :
                     "You beat me :-(");

      //      if (right >= wrong)
      //        Stdio.println("I out guessed you!");
      //      else
      //        Stdio.println("You beat me :-(");

    }

  // *************************
  // main
  // *************************

  public static void main (String[] args) 
  {
    MindReader mr = new MindReader ();

    Stdio.println ("               Welcome to MindReader");
    do {
      mr.play ();
    } while (Stdio.readChar("\nPlay again [y/n] ? ") == 'y');

  }
}