/* LCS Week 6 
 * 10/8/06
 * A Book in the book store.
 * Input      : purchase and sales of books
 * Output     : inventory of current books and total profit
 */


/**
 * Represents an individual title on the shelves 
 */
public class Book
{
    private String title;
    private double price;
    private String author;
    private int numberSold;
    private int copiesOnHand;
    private double grossProfit;


    /**
     * create new book object
     *
     * @param aTitle - this books title
     * @param aAuthor - the books author
     * @param aPrice - this books initial price
     */
    public Book(String aTitle, String aAuthor, double aPrice)
    {
        title = aTitle;
        price = aPrice;
        author = aAuthor;
        numberSold = 0;
        copiesOnHand = 0;
    }


    /**
     * sell a single copy of the book
     * @return true iff there was a copy of sell
     */
    public void sellCopy()
    {
        ... 
    }


    /**
     * stock a shipment of this book
     *
     * @param quantity - the number of copies of this book stocked
     */
    public void getShipment(int quantity)
    {
        copiesOnHand += quantity;
    }


    /**
     * reduce the price of this book
     *
     * @param by - the amount to reduce the price by
     */
    public void lowerPrice(double by)
    {
        if (by > 0)
        {
            price -= by;
        }
        else
        {
            // FIX ME oops ... need to raise some kind of exception!
        }
    }


    /**
     * for the inventory return the title, author, number on hand and gross sales
     *
     * @return - inventory line for the book
     */
    public String toString()
    {
        return title + " " + author + " copies left " + copiesOnHand + " gross sales " + grossProfit;
    }



    public static void main (String [] args)
    {
        Book catInTheHat = new Book("Cat in the Hat", "Dr. Seuse", 5.99);

        System.out.println("cat book = " + catInTheHat);

        catInTheHat.getShipment(10);
        catInTheHat.sellCopy();
        
        System.out.println("cat book = " + catInTheHat);

        catInTheHat.sellCopy();
        System.out.println("cat book = " + catInTheHat);

        catInTheHat.lowerPrice(1.00);
        catInTheHat.sellCopy();
        System.out.println("cat book = " + catInTheHat);

        // 1: prompt user for choice
        // 2: if choice == 1 quit
        // 3: if choice == 2 sell a copy
        // 4: if choice == 3 stock a shipment
        // 5: print current 'inventory'
        // 6: goto 1
    }
}