package com.jotuntech.sketcher.client.command;

import java.nio.ByteBuffer;

import com.jotuntech.sketcher.client.Client;
import com.jotuntech.sketcher.client.Command;
import com.jotuntech.sketcher.client.Connection;
import com.jotuntech.sketcher.common.User;

public class SetColorCommand implements Command {
	static boolean firstWhite = true;
	int color;

	public SetColorCommand() {
	}

	public SetColorCommand(int color) {
		this.color = color;
	}

	public int perform(Client client, User user) {
		if(color == 0xFFFFFF && user == client.getConnection().getUser() && client.getConnection().getUser().getBrush() != null && client.getConnection().getUser().getBrush().getOpacity() > 0 && firstWhite) {
			client.getUserInterface().println("Use eraser unless drawing white. :-)");
			firstWhite = false;
		}

		return perform(user) ? Connection.SEND_OTHERS : Connection.SEND_NONE;
	}

	private boolean perform(User user) {
		if(user == null) {
			/** Signed in users only */
			return false;
		}

		if(user.isViewer()) {
			return false;
		}

		user.setColor(color);

		return true;
	}

	public void decode(ByteBuffer in) {
		color = in.getInt();
	}

	public void encode(ByteBuffer out) {
		out.putInt(color);
	}

}