package envoy.client.data;

import java.time.Instant;

import envoy.data.*;
import envoy.data.Message.MessageStatus;
import envoy.event.GroupMessageStatusChange;

import envoy.client.net.WriteProxy;

/**
 * Represents a chat between a user and a group as a list of messages.
 *
 * @author Maximilian Käfer
 * @since Envoy Client v0.1-beta
 */
public final class GroupChat extends Chat {

	private final User sender;

	private static final long serialVersionUID = 1L;

	/**
	 * @param sender    the user sending the messages
	 * @param recipient the group whose members receive the messages
	 * @since Envoy Client v0.1-beta
	 */
	public GroupChat(User sender, Group recipient) {
		super(recipient);
		this.sender = sender;
	}

	@Override
	public void read(WriteProxy writeProxy) {
		for (int i = messages.size() - 1; i >= 0; --i) {
			final GroupMessage gmsg = (GroupMessage) messages.get(i);
			if (gmsg.getSenderID() != sender.getID())
				if (gmsg.getMemberStatuses().get(sender.getID()) == MessageStatus.READ)
					break;
				else {
					gmsg.getMemberStatuses().replace(sender.getID(), MessageStatus.READ);
					writeProxy.writeMessageStatusChange(new GroupMessageStatusChange(gmsg.getID(),
						MessageStatus.READ, Instant.now(), sender.getID()));
				}
		}
		unreadAmount = 0;
	}
}