/*
 * LibraryMain.java
 *
 * Created on July 10, 2003, 11:47 AM
 */

package mid1Library;

import java.util.ArrayList;
import java.util.Iterator;

/** Common interface for any kind of item owned by the library.
 */
interface ILibraryItem {
    
    /** Tells the title of the item. */
    String getTitle();
    
    /** Determines whether the item is overdue.
     * @return true if the item is checked out and is overdue; false otherwise. */
    boolean isOverdue();
    
    /** Tells the name of the borrower of the item.
     * @return the name of the borrower (patron) if the item is checked out;
     *   returns null if the item is not checked out.
     *  The name should exactly match the patron name as recorded in some IPatron object.
     */
     String getBorrowerName();
}

/** Iterface describing library patrons, who may borrow items from the library.
 */
interface IPatron {
    
    /** Tells the name of the patron. */
    String getName();
    
    /** Tells the address of the patron. 
     * @return a string with the address in a multi-line format, suitable for
     *  printing on a mailing label.
     */
    String getAddress();
    
}

/** Encapsulate the information needed to prepare and send an overdue notice
 *  to the patron who has the item checked out.  There is one notice per overdue
 *  item, even if one patron has many such items.
 */
abstract class AOverdueNotice {
    
    /** Name of the patron who should receive the notice. */
    protected String pName;
    /** Address of the patron who should receive the notice, in a multi-line form
     *  suitable for printing on a mailing label. */
    protected String pAddress;
    /** Title of the item which is overdue. */
    protected String iName;
    
    /** Record the name of the patron who has the item checked out.  The name
     *  will be exactly in the same format as in a Library Item object. */
    public abstract void setPatronName(String name);
    
   
    /** Record the address of the patron who should receive the notice, 
        in a multi-line form suitable for printing on a mailing label. */
    public abstract void setPatronAddress(String address);
    
    /** Record the title of the item which is overdue. */
    public abstract void setItemName(String name);
}
/**
 * 
 * @author  dickey
 */
public class LibraryMain {
    
    /** Creates a new instance of LibraryMain */
    public LibraryMain() {
    }
    
    /** Find the overdue items and prepare an overdue notice for each one.
     * @param allItems A list of all Library Items owned by the library.
     * @param allPatrons A list of all patrons who have library cards.
     * @return a list of OverdueNotice objects, one for each item which is
     *   checked out and overdue.
     */
    public ArrayList listOverdue(ArrayList allItems, IPatron[] allPatrons) {
        ArrayList notices = new ArrayList();
        Iterator itemIter = allItems.iterator();
        while (itemIter.hasNext()) {
            ILibraryItem anItem = (ILibraryItem) itemIter.next();
            if (anItem.isOverdue()) {
                AOverdueNotice notice = new OverdueNotice();
                notice.setItemName(anItem.getTitle());
                String pName = anItem.getBorrowerName();
                notice.setPatronName(pName);
                IPatron borrower = findPatron(allPatrons, pName);
                String pAddress;
                if (borrower == null) {
                    pAddress =  "unknown address";
                } else {
                    pAddress = borrower.getAddress();
                }
                notice.setPatronAddress(pAddress);
                notices.add(notice);                
            }
        }
    return notices;
    }
    
    /** Find and return the patron whose name is given.
     *  An exact match is required.
     *  @return the matching patron, or null if there is no match
     */
    private IPatron findPatron(IPatron[] patrons, String patronName) {
        for (int p = 0; p < patrons.length; p++) {
            if (patrons[p].getName().equals(patronName)) {
                return patrons[p];
            }
        }
        return null;
    }

}





class OverdueNotice extends AOverdueNotice {
    public void setPatronName(String name) { this.pName = name;}
    
    public void setPatronAddress(String address) { this.pAddress = address;}
    
    public void setItemName(String name) { this.iName = name;}
    
    public String toString() {
        return this.pName + "\n" + this.pAddress + "\n" + this.iName;
    }

}