// Sample solution for HW2
import java.time.LocalDate;

public class BookCopy {
    public static final int BORROWING_WEEKS = 3;
    public static final int RENEWAL_WEEKS = 2;
    public static final double FINE_PER_DAY = .10;
    private Book book;
    private LibraryCard card;
    private LocalDate dueDate;

    public BookCopy(Book b)
    {
        book = b;
        card = null;
        dueDate = null;
    }

    public Book getBook() {return book;}
    public String getTitle() {return book.getTitle();}
    public LibraryCard getCard() {return card;}
    public LocalDate getDueDate() {return dueDate;}

    public boolean checkOut(LibraryCard borrower, LocalDate dateOfBorrowing)

    /*checks book out by setting card reference to borrower.
    returns false if book is already checked out
    sets due date to BORROWING_WEEKS after current date passed */

    {
        if (card != null)
            return false;
        card = borrower;
        dueDate = dateOfBorrowing.plusWeeks(BORROWING_WEEKS);
        return true;
    }

    public boolean checkOut (LibraryCard borrower)
    //default check out method that uses todays' date
    {
        return checkOut(borrower, LocalDate.now());
    }

    public boolean returnBook()
            //returns book by removing card reference
            //returns false if there is no reference to a card
    {
        if (card == null)
            return false;
        card = null;
        return true;
    }

    public boolean renew (LocalDate renewalDate)
    //renews book using RENEWAL_WEEKS as interval
    //returns false if books is not checked out
    {
        if (card == null)
            return false;
        dueDate = renewalDate.plusWeeks(RENEWAL_WEEKS);
        return true;
    }

    public boolean renew ()
    //default method uses todays date as renewal date
    {
        return renew(LocalDate.now());
    }


}