public class ScoreboardObj2 extends PlaceholderExpansion {
    @Override
    public boolean canRegister() {
        return true;
    }

    @Override
    public String getAuthor() {
        return "bloobyjoobyjoob";
    }

    @Override
    public String getIdentifier() {
        return "scoreboardobj2";
    }

    @Override
    public String getPlugin() {
        return null;
    }

    @Override
    public String getVersion() {
        return "1.0.0";
    }

    @Override
    public String onPlaceholderRequest(Player p, String identifier) {
        return onRequest((OfflinePlayer)p, identifier);
    }

    @Override
    public String onRequest(OfflinePlayer player, String identifier) {
        if (identifier.equals("placeholder1"))
            return "placeholder1 works";
        if (identifier.equals("placeholder2"))
            return "placeholder2 works";
        if (identifier.startsWith("topscore_")) {
            ArrayList<String> args = getArgs(identifier, "topscore_");
            Scoreboard sb = Bukkit.getScoreboardManager().getMainScoreboard();
            String objName = args.get(0);
            String topNum = args.get(1);
            Objective obj = sb.getObjective(objName);
            ArrayList<Integer> scores = new ArrayList<>();
            for (String entry : sb.getEntries()) {
                System.out.println(obj.getScore(entry).getScore());
                int score = obj.getScore(entry).getScore();
                scores.add(score);
            }
            Collections.sort(scores);
            Collections.reverse(scores);
            return String.valueOf(scores.get(Integer.parseInt(topNum)));
        }
        if (identifier.startsWith("topplayer_"))
            return "player here";
        return null;
    }

    private static ArrayList<String> getArgs(String str, String ident) {
        ArrayList<String> result = new ArrayList<>();
        String argsStr = str.replace(ident, "");
        String[] args = argsStr.split("_");
        if (args.length == 2) {
            result.add(args[0]);
            result.add(args[1]);
        } else {
            result.add(args[0]);
        }
        return result;
    }
}