/***********************
 *   Loopy - practice with loops
 *
 *   @author   Shawn Brenneman (modified by ibarland to use methods and no I/O)
 *   @date     2019-Sep-25
 ***********************/
 
 public class LoopyAfter extends Object120 {

     /** Return the number of rolls of 2d6 until we rolled (1,1).
      */
     static int rollsTilGet( int targetSum ) {
        int die1;
        int die2;
        
        // two loop vars:
        boolean gotTarget = false;  // a loop-control variable
        int rollsSoFar = 0;    // accumulator var (the pertinent info accumulated from all previous iterations)

        while (!gotTarget) {
            die1 = randomInt(6) + 1;
            die2 = randomInt(6) + 1;
            //System.out.println("Debug: rolled " + die1 + "," + die2);

            rollsSoFar = rollsSoFar + 1;    // update accumulator var
            gotTarget = (die1+die2 == targetSum);  // update loop-control var
        }
        return rollsSoFar;
     }
     
     
     static final int MAX_VAL = 100;
     /** Have a human play the hi-lo guessing game.
      *  @return the number of guesses the human took.
      */
     static int hiloHumanIO() {
        int target = randomInt(MAX_VAL);
        int guess;             // We'll read input from the keyboard ("System.in").
        int guessesSoFar = 0;  // accumulator
        
        System.out.println( "debug: target is " + target );
        System.out.print( "Guess a number in [0," + MAX_VAL + "): " );
        guess = nextInt();               // Btw: func's full name is: Object120.nextInt()
        guessesSoFar = guessesSoFar + 1;

        while (guess != target) {     // (no explicit loop-control var)
            String direction;
            if (guess > target) {
                direction = "high";
            } else {
                direction = "low";
            }
            System.out.print("Too " + direction + ".  ");
            System.out.print("Guess again: ");
            guess = nextInt();                // update loop-condition
            guessesSoFar = guessesSoFar + 1;  // update accumulator
        }
        System.out.println( "You got it in " + guessesSoFar + " guesses." );
        return guessesSoFar;
    }
    
    
    /* Not actually unit-tests -- we can't use `assertEquals`, because the expected-outcome isn't known. */
    public static void testAll() {
        System.out.println( "==== testing all" );
        System.out.println( "#1: It took " + toString(rollsTilGet(2)) + " rolls to get snakeeyes." );
        System.out.println( "#2: It took " + toString(rollsTilGet(2)) + " rolls to get snakeeyes." );
        System.out.println( "#3: It took " + toString(rollsTilGet(2)) + " rolls to get snakeeyes." );
        System.out.println( "#4: It took " + toString(rollsTilGet(2)) + " rolls to get snakeeyes." );
        System.out.println( "" );

        System.out.println( "#1: It took " + toString(rollsTilGet(3)) + " rolls to get acey-deucy." );
        System.out.println( "#2: It took " + toString(rollsTilGet(3)) + " rolls to get acey-deucy." );
        System.out.println( "#3: It took " + toString(rollsTilGet(3)) + " rolls to get acey-deucy." );
        System.out.println( "#4: It took " + toString(rollsTilGet(3)) + " rolls to get acey-deucy." );
        System.out.println( "" );

        System.out.println( "#1: It took " + toString(rollsTilGet(7)) + " rolls to get 7." );
        System.out.println( "#2: It took " + toString(rollsTilGet(7)) + " rolls to get 7." );
        System.out.println( "#3: It took " + toString(rollsTilGet(7)) + " rolls to get 7." );
        System.out.println( "#4: It took " + toString(rollsTilGet(7)) + " rolls to get 7." );
        System.out.println( "" );
        
        System.out.println( "It took us " + hiloHumanIO() + " guesses for the hidden number." );
        return;
    }
    
    public static void main( String[] args ) { testAll(); }
}