/** Examples of functions using booleans
 * (has helper values, as inputs, as outputs).
 * See
 * http://www.radford.edu/~itec120/2010fall-ibarland/Lectures/lect03b.html
 * @author Ian Barland
 * @version 2010.Sep.15
 */
class Lect03b {

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

    /** Test our boolean functions */
    static void testBooleans() {
        System.out.println( "Max of 10, 2:" );
        System.out.println( "Actual: " + myMax( 10,2) );
        System.out.println( "Expected: 10" );

        System.out.println( "Max of 2, 10:" );
        System.out.println( "Actual: " + myMax( 2,10 ) );
        System.out.println( "Expected: 10" );

        System.out.println( "Max of 3, 3:" );
        System.out.println( "Actual: " + myMax( 3,3 ) );
        System.out.println( "Expected: 3" );

        System.out.println( "Inventory message for 3 mushrooms: " );
        System.out.println( "Actual: \""+ slicesReadyMsg( "mushroom", 3 ) + "\"" );
        System.out.println( "Expect: \"There are 3 piping hot pieces of mushroom pizza, ready to eat!\"");
        System.out.println();

        System.out.println( "Inventory message for 0 pepperoni: " );
        System.out.println( "Actual: \""+ slicesReadyMsg( "pepperoni", 0 ) + "\"" );
        System.out.println( "Expect: \"There are 0 piping hot pieces of pepperoni pizza, ready to eat!\"");
        System.out.println();

        System.out.println( "Inventory message for 1 pepperoni: " );
        System.out.println( "Actual: \""+ slicesReadyMsg( "pepperoni", 1 ) + "\"" );
        System.out.println( "Expect: \"There is 1 piping hot piece of pepperoni pizza, ready to eat!\"");
        System.out.println();

        System.out.println( "driving time for 0m when road clear." );
        System.out.println( "Actual: " + highwayDrivingTime(0,true) );
        System.out.println( "Expect: 0" );
        System.out.println();

        System.out.println( "Must a 0-year-old register for the draft?" );
        System.out.println( "Actual: " + mustRegisterForDraft(0) );
        System.out.println( "Expect: false" );
        System.out.println();

        System.out.println( "Actual: " + qualifies100m( 0, 'M' ) );
        System.out.println( "Expect: true" );
        System.out.println( "Actual: " + qualifies100m( 10.5, 'F' ) );
        System.out.println( "Expect: true" );
        System.out.println( "Actual: " + qualifies100m( 13.6, 'M' ) );
        System.out.println( "Expect: false" );
        System.out.println( "Actual: " + qualifies100m( 13.6, 'F' ) );
        System.out.println( "Expect: false" );
        System.out.println( "Actual: " + qualifies100m( 10.07, 'M' ) );
        System.out.println( "Expect: true" );
        System.out.println( "Actual: " + qualifies100m( 11.13, 'F' ) );
        System.out.println( "Expect: true" );
        System.out.println( "Actual: " + qualifies100m( 11.13, 'M' ) );
        System.out.println( "Expect: false" );
        System.out.println( "========" );
    }

    /** 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.
     * @return A complete sentence describing the inventory.
     */
    static String slicesReadyMsg( String topping, int slicesReady ) {
        String verbForm;
        String plural;

        if (slicesReady != 1) {
            verbForm = "are";
            plural = "s";
        }
        else {
            i
            verbForm = "is";      
            plural = "";      
        }

        return "There " + verbForm + " "
        + slicesReady
        + " piping hot piece" + plural + " of "
        + topping
        + " pizza, ready to eat!";    
    }

    /** Give an estimate of how far it will take to travel a given distance, on the highway.
     * @param miles How far to travel, in miles.
     * @param isRoadClear  Is the road in good condition (true), or is it icy/foggy/accidented (false)?
     * @return The estimated time of driving that far, in hours.
     */
    static double highwayDrivingTime( double miles, boolean isRoadClear ) {
        int SPEED_LIMIT;   // posted limit, in MPH.
        SPEED_LIMIT = 65;  

        double DELAY_FACTOR;
        // If road isn't clear, how much does that slow us down?  
        // 2.0 means twice as long, 1.0 is no slowdown (and less than 1.0 would be a speedup).
        DELAY_FACTOR = 1.6;

        return (miles / SPEED_LIMIT);
    }

    /**
     * @param age The age (in years) of the person in question.  E.g., 18months is age 1.
     * @return whether or not the person must register with Selective Service.
     *   mustRegisterForDraft(22) == true
     *   mustRegisterForDraft(14) == false
     */
    static boolean mustRegisterForDraft( int age ) {
        return true;
    }

    static boolean  qualifies100m( double time, char gender ) {
        if (gender=='F') {
            return (time <= 11.13);
        }
        else {
            if (time <= 10.07) {
                return true;
            }
            else {
                return false;
            }        
        }
    }

}