package envoy.event;

import java.time.Instant;

import envoy.data.Message;

/**
 * @author Kai S. K. Engelbart
 * @since Envoy Common v0.2-alpha
 */
public class MessageStatusChange extends Event<Message.MessageStatus> {

	private final long		id;
	private final Instant	date;

	private static final long serialVersionUID = 0L;

	/**
	 * Initializes a {@link MessageStatusChange}.
	 *
	 * @param id     the ID of the {@link Message} this event is related to
	 * @param status the status of the {@link Message} this event is related to
	 * @param date   the date at which the MessageStatus change occurred
	 * @since Envoy Common v0.2-beta
	 */
	public MessageStatusChange(long id, Message.MessageStatus status, Instant date) {
		super(status);
		this.id		= id;
		this.date	= date;
	}

	/**
	 * Initializes a {@link MessageStatusChange} through a message.
	 *
	 * @param message the message from which to build the event
	 * @since Envoy Common v0.2-alpha
	 */
	public MessageStatusChange(Message message) {
		this(message.getID(), message.getStatus(), Instant.now());
	}

	/**
	 * @return the ID of the {@link Message} this event is related to
	 * @since Envoy Common v0.2-alpha
	 */
	public long getID() { return id; }

	/**
	 * @return the date at which the status change occurred
	 * @since Envoy Common v0.2-beta
	 */
	public Instant getDate() { return date; }

	@Override
	public String toString() {
		return String.format("MessageStatusChange[id=%d,status=%s,date=%s]", id, value, date);
	}
}