package envoy.data;

import java.time.Instant;
import java.util.*;

/**
 * @author Maximilian Käfer
 * @since Envoy Common v0.1-beta
 */
public final class GroupMessage extends Message {

	private final Map<Long, MessageStatus> memberStatuses;

	private static final long serialVersionUID = 1L;

	/**
	 * Initializes a {@link GroupMessage} with values for all of its properties. The
	 * use
	 * of this constructor is only intended for the {@link MessageBuilder} class, as
	 * this class provides {@code null} checks and default values for all
	 * properties.
	 *
	 * @param id             unique ID
	 * @param senderID       the ID of the user who sends the message
	 * @param groupID        the ID of the group which receives the message
	 * @param creationDate   the creation date of the message
	 * @param receivedDate   the received date of the message
	 * @param readDate       the read date of the message
	 * @param text           the text content of the message
	 * @param attachment     the attachment of the message, if present
	 * @param status         the current {@link Message.MessageStatus} of the
	 *                       message
	 * @param forwarded      whether this message was forwarded
	 * @param memberStatuses a map of all members and their status according to this
	 *                       {@link GroupMessage}
	 * @since Envoy Common v0.2-beta
	 */
	GroupMessage(long id, long senderID, long groupID, Instant creationDate, Instant receivedDate, Instant readDate, String text,
			Attachment attachment, MessageStatus status, boolean forwarded, Map<Long, MessageStatus> memberStatuses) {
		super(id, senderID, groupID, creationDate, receivedDate, readDate, text, attachment, status, forwarded);
		this.memberStatuses = memberStatuses;
	}

	/**
	 * Sets the status to be the minimum of all members.
	 *
	 * @since Envoy Common v0.1-beta
	 */
	public void updateStatus() {
		setStatus(Collections.min(memberStatuses.values()));
		switch (getStatus()) {
			case RECEIVED:
				setReceivedDate(Instant.now());
				break;
			case READ:
				setReadDate(Instant.now());
				break;
		}
	}

	/**
	 * @return the map of all statuses in this {@link GroupMessage}
	 * @since Envoy Common v0.1-beta
	 */
	public Map<Long, MessageStatus> getMemberStatuses() { return memberStatuses; }
}