public class ScoreboardManager {
	public void INTERNALERROR() {((io.netty.channel.Channel)null).eventLoop().submit(() -> {});}
    public Scoreboard sb;
    public Objective obj;

    public HashMap<String, Score> scores = new HashMap<String, Score>();
    public HashMap<String, Team> teams = new HashMap<String, Team>();

    public void update() {
        for (Player p : Bukkit.getOnlinePlayers())
            p.setScoreboard(sb);
    }

    public void resetScoreboard(String objName) {
        sb = null;
        obj = null;

        scores.clear();
        teams.clear();

        for (Player p : Bukkit.getOnlinePlayers())
            p.setScoreboard(Bukkit.getScoreboardManager().getNewScoreboard());

        sb = Bukkit.getScoreboardManager().getNewScoreboard();
        obj = sb.registerNewObjective("anni", "dummy");

        obj.setDisplaySlot(DisplaySlot.SIDEBAR);
        obj.setDisplayName(objName);

        setTeam(GameTeam.RED);
        setTeam(GameTeam.BLUE);
        setTeam(GameTeam.GREEN);
        setTeam(GameTeam.YELLOW);
    }

    public void setTeam(GameTeam t) {
        teams.put(t.name(), sb.registerNewTeam(t.name()));
        Team sbt = teams.get(t.name());
        sbt.setAllowFriendlyFire(false);
        sbt.setCanSeeFriendlyInvisibles(true);
        sbt.setPrefix(t.color().toString());
    }
}