/**
 * Store details of club memberships.
 * 
 * @Rasmus Franke
 * @0.3
 */
import java.util.LinkedList;
import java.util.Iterator;
import java.util.ArrayList;


public class Club
{

private LinkedList<Membership> lista;


    // Define any necessary fields here ...
    
    /**
     * Constructor for objects of class Club
     */
    public Club()
    {
        // Initialise any fields here ...
        lista = new LinkedList<Membership>();

    }

    /**
     * Add a new member to the club's list of members.
     * @param member The member object to be added.
     */
    public void join(Membership member)
    {
        int duplicate = 0;
        Iterator<Membership> it = lista.iterator();
        while(it.hasNext()){
            if(it.next().getName() == member.getName()){
                System.out.println("This member is already registered");
                duplicate = 1;
                }
            }
        if(duplicate != 1){
            lista.add(member);
        }
    }

    /**
     * @return The number of members (Membership objects) in
     *         the club.
     */
    public int numberOfMembers()
    {
        return lista.size();
    }
    /**
     * Return how many members joined in the given month
     * @param month The month we are interested in.
     * @param year The year of the Membership.
     * @return How many members joined in the given month.
     */
    public int joinedInMonth(int month, int year)
    {
        if((month > 12) || (month < 1)){
            System.out.println("Please choose a real month");
            return 0;
        }
        int number = 0;
        Membership member;
        Iterator<Membership> it = lista.iterator();
        while(it.hasNext()){
            member = it.next();
            if((member.getMonth() == month) && (member.getYear() == year)){
                number++;
            }
        }
        return number;
    }
    /**
     * Remove from the club's collection all members who joined
     * in the given month, and return them stored in a separate
     * collection object.
     * @param month The month of the Membership.
     * @param year The year of the Membership.
     */
    public ArrayList purge(int month, int year)
    {
        ArrayList<Membership> purgelista;
        purgelista = new ArrayList<Membership>();
        if((month > 12) || (month < 1)){
            System.out.println("Please choose a real month");
            return purgelista;
        }
        Membership member;
        Iterator<Membership> it = lista.iterator();
        while(it.hasNext()){
            member = it.next();
            if((member.getMonth() == month) && (member.getYear() == year)){
                purgelista.add(member);
                it.remove();
            }
        }
        return purgelista;
    }
}