class Lect120 extends Object120 {

    /** Given how many slices of (say) mushroom pizza are
     * currently available, create a nice tempting message
     * to advertise (shout out, or post, or put on a 
     * LED sign...)
     *
     * @param topping The type of pizza (e.g. "pepperoni")
     * @param piecesReady The number of currently ready-to-serve
     *    slices with the given topping.  Must be non-negative.
     * @return A complete sentence describing the inventory.
     * For example:
     * 
     */
    static String slicesReadyMsg( String flavor, int numSlices ) {
        String verb;
        String plurality; // what to place after the noun, to indicate plural or not.
        if (numSlices == 1) {
            verb = "is";
            if (equals(flavor, "cactus")) {
                plurality = "us";
            }
            else {
                plurality = "";
            }
        }
        else {
            verb = "are";
            if (!equals(flavor, "cactus")) {
                plurality = "s";
            }
            else {
                plurality = "i";
            }
        }

        if (!equals(flavor, "cactus")) {
            return "There " + verb + " " + numSlices + " piping hot piece" + plurality + " of " + flavor + " pizza, ready to eat!";
        }
        else {
            return "Woot!  " + numSlices + " cact" + plurality + " " + verb + " up!";
        }
    }

    static void testSlicesReadyMsg() {   
        System.out.println( "Actual: " + slicesReadyMsg( "mushroom", 3 ));
        System.out.println( "Desire: " + "There are 3 piping hot pieces of mushroom pizza, ready to eat!" );

        System.out.println( "Actual: " + slicesReadyMsg( "mushroom", 0 ));
        System.out.println( "Desire: " + "There are 0 piping hot pieces of mushroom pizza, ready to eat!" );

        System.out.println( "Actual: " + slicesReadyMsg( "hawaiian", 0 ));
        System.out.println( "Desire: " + "There are 0 piping hot pieces of hawaiian pizza, ready to eat!" );

        System.out.println( "Actual: " + slicesReadyMsg( "cactus", 17 ));
        System.out.println( "Desire: " + "Woot!  17 cacti are up!" );

        System.out.println( "Actual: " + slicesReadyMsg( "cactus", 1 ));
        System.out.println( "Desire: " + "Woot!  1 cactus is up!" );

        System.out.println( "Actual: " + slicesReadyMsg( "cactus", 0 ));
        System.out.println( "Desire: " + "Woot!  0 cacti are up!" );

        System.out.println( "Actual: " + slicesReadyMsg( "mushroom", 1 ));
        System.out.println( "Desire: " + "There is 1 piping hot piece of mushroom pizza, ready to eat!" );
    }

    static char lastChar( String wrd ) {
        return charAt(wrd, length(wrd)-1);
    }

    
    static String callOut( String name ) {
        return "Hey, that means you, " + name + ".";
    }

    // you write `wwngbt`
    static String wwngbt( String nameToDiss ) {
        return "We will NEVER get back together.  " + callOut(nameToDiss);
    }

    // you write `wwngbt`
    static String wwngbt_obscured( String nameToDiss ) {
        //return "We will NEVER get back together.  " + callOut(toString(lastChar(nameToDiss)));
        return wwngbt( toString(lastChar(nameToDiss) ));
    }

    static void testWwngbt() {
        System.out.println( "Actual:  " + wwngbt("Barland") );
        System.out.println( "Desired: " + "We will NEVER get back together.  Hey, that means you, Barland." );

        System.out.println( "Actual:  " + wwngbt("Insane Clown Posse") );
        System.out.println( "Desired: " + "We will NEVER get back together.  Hey, that means you, Insane Clown Posse." );

        System.out.println( "Actual:  " + wwngbt("Taylor Swift") );
        System.out.println( "Desired: " + "We will NEVER get back together.  Hey, that means you, Taylor Swift." );
    }

    static void testWwngbt_obscured() {
        System.out.println( "Actual:  " + wwngbt_obscured("Barland")  );
        System.out.println( "Desired: " + "We will NEVER get back together.  Hey, that means you, d." );

        System.out.println( "Actual:  " + wwngbt_obscured("Insane Clown Posse") );
        System.out.println( "Desired: " + "We will NEVER get back together.  Hey, that means you, e." );

        System.out.println( "Actual:  " + wwngbt_obscured("Taylor Swift") );
        System.out.println( "Desired: " + "We will NEVER get back together.  Hey, that means you, t." );
    }

    static void testLastChar() {
        System.out.println( "Actual: " + lastChar("hello") );
        System.out.println( "Desire: " + 'o' );
        System.out.println( "Actual: " + lastChar("z") );
        System.out.println( "Desire: " + 'z' );
        System.out.println( "Actual: " + lastChar("huh?") );
        System.out.println( "Desire: " + '?' );
    }

    static void testCallOut() {
        System.out.println( "Actual:  " + callOut( "Caleb" ) );
        System.out.println( "Desired: " + "Hey, that means you, Caleb." );

        System.out.println( "Actual:  " + callOut( "Taylor Swift" ) );
        System.out.println( "Desired: " + "Hey, that means you, Taylor Swift." );
    }

    static void testAll() {
        System.out.println( "==== Testing all ====" );
        testLastChar();
        testCallOut();
        testWwngbt();
        testWwngbt_obscured();
        testMyMax();
        testSlicesReadyMsg();
    }

    static double myMax( double x, double y) {
        if (x >= y) {
            return x;
        }
        else {
            return y;
        }
    }

    /**
     * Given a *nonnegative* numCustomers, how much to charge (in dollars)?
     */
    static double buffetPrice( int numCustomers ) {
        if (numCustomers != 0) {
            return 8 + 4.5*(numCustomers-1);
        }
        else {
            return 0;
        }

    }

    static void testMyMax() {

        System.out.println( "Actual:  " + myMax( toDouble(17), 17) );
        System.out.println( "Desired: " + 17 );

        System.out.println( "Actual:  " + myMax( Math.pow(Math.PI, Math.E), 64 ));
        System.out.println( "Desired: " + 64 );

        System.out.println( "Actual:  " + myMax(3,7) );
        System.out.println( "Desired: " + 7 );
        System.out.println( "Actual:  " + myMax(3.5, 3.6) );
        System.out.println( "Desired: " + 3.6 );
        System.out.println( "Actual:  " + myMax(-8, 2) );
        System.out.println( "Desired: " + 2 );
        System.out.println( "Actual:  " + myMax(-8, -2) );
        System.out.println( "Desired: " + -2 );
        System.out.println( "Actual:  " + myMax(0, -2) );
        System.out.println( "Desired: " + 0 );
    }

    static void whileDemo() {
        String chapterTitle = "An Unexpected Party that is very very long and keeps on going and going";
        // Create the string "An Unexpected Party ..................." which is exactly 40 chars long
        // for use in a table-of-contents ("toc")
        String tocSoFar = chapterTitle + " ";
        while (length(tocSoFar) < 40) {
            tocSoFar = tocSoFar + ".";
            System.out.println( "tocSoFar is " + length(tocSoFar) + "chars: " + tocSoFar );
        }
        System.out.println(tocSoFar);
    }
    
    /** Return `msg` padded with copies of `padStr` so that the
     *  result is at least `minLength` characters long.
     *  @return `msg` padded with copies of `padStr` so that the result is at least `minLength` characters long.
     */
    static String padRight( String msg, String padStr, int minLength ) {
        String paddedSoFar = msg;
        while (length(paddedSoFar) < minLength) {
            paddedSoFar = paddedSoFar + padStr;
            }
        return paddedSoFar;
    }
    
    /** Return `txt` but with each 'e' replaced with '3'.
     * @return `txt` but with each 'e' replaced with '3'.
     */
    static String leet( String txt ) {
        String leetTxtSoFar = "";
        int nextIndexToCheck = 0;
        
        while (nextIndexToCheck < length(txt)) {
            char nextChar =charAt(txt,nextIndexToCheck); 
            if (nextChar == 'e') {
                leetTxtSoFar = leetTxtSoFar + '3';
            }
            else { 
                leetTxtSoFar = leetTxtSoFar + nextChar;
            }
            nextIndexToCheck = nextIndexToCheck + 1;
            System.out.println( "debug: At loop-bottom: nextIndexToCheck is " + nextIndexToCheck + " and leetTxtSoFar is " + leetTxtSoFar );
        }

        return leetTxtSoFar;
    }

}