package envoy.data;

import java.io.*;
import java.util.*;

/**
 * @author Leon Hofmeister
 * @since Envoy Common v0.1-beta
 */
public final class Group extends Contact {

	private static final long serialVersionUID = 0L;

	/**
	 * Creates a new instance of a {@link Group} without any members.
	 *
	 * @param id   the ID of this group
	 * @param name the name of this group
	 * @since Envoy Common v0.1-beta
	 */
	public Group(long id, String name) {
		this(id, name, new HashSet<User>());
	}

	/**
	 * Creates an instance of a {@link Group}.
	 *
	 * @param id      the ID of this group
	 * @param name    the name of this group
	 * @param members all members that should be preinitialized
	 * @since Envoy Common v0.1-beta
	 */
	public Group(long id, String name, Set<User> members) {
		super(id, name, members);
	}

	@Override
	public String toString() {
		return String.format("Group[id=%d,name=%s,%d member(s)]", id, name, contacts.size());
	}

	private void readObject(ObjectInputStream inputStream) throws Exception {
		inputStream.defaultReadObject();
		var contacts = Contact.class.getDeclaredField("contacts");
		contacts.setAccessible(true);
		contacts.set(this, inputStream.readObject());
	}

	private void writeObject(ObjectOutputStream outputStream) throws Exception {
		outputStream.defaultWriteObject();
		getContacts().forEach(user -> user.serializeContacts(false));
		outputStream.writeObject(getContacts());
	}

	@Override
	public Set<User> getContacts() { return (Set<User>) contacts; }
}