import org.bukkit.Bukkit;
import org.bukkit.entity.Player;
import org.bukkit.scoreboard.DisplaySlot;
import org.bukkit.scoreboard.Objective;
import org.bukkit.scoreboard.Scoreboard;
import org.bukkit.scoreboard.ScoreboardManager;

import java.util.Arrays;
import java.util.Collections;
import java.util.List;
import java.util.Set;

public class Board {

    private static ScoreboardManager manager = Bukkit.getScoreboardManager();

    private Scoreboard scoreboard;
    private Objective objective;

    public Board(String name) {
        this.scoreboard = manager.getNewScoreboard();
        this.objective = scoreboard.registerNewObjective("Board", "dummy");
        this.objective.setDisplaySlot(DisplaySlot.SIDEBAR);
    }

    public Board(Player player) {
        if(player.getScoreboard() != null && player.getScoreboard().getObjective(DisplaySlot.SIDEBAR) != null) {
            this.scoreboard = player.getScoreboard();
            this.objective = scoreboard.getObjective(DisplaySlot.SIDEBAR);
        } else {
            this.scoreboard = manager.getNewScoreboard();
            this.objective = scoreboard.registerNewObjective("Board", "dummy");
            this.objective.setDisplaySlot(DisplaySlot.SIDEBAR);
        }
    }

    public String getDisplayName() {
        return objective.getDisplayName();
    }

    public void setDisplayName(String displayName) {
        objective.setDisplayName(displayName);
    }

    public void addEntry(int score, String text) {
        if(score > 15) {
            return;
        }

        for(String entry : scoreboard.getEntries()) {
            if(objective.getScore(entry).getScore() == score) {
                if(entry.equals(text)) {
                    return;
                }

                scoreboard.resetScores(entry);
                break;
            }
        }

        objective.getScore(text).setScore(score);
    }

    public void removeEntry(int score) {
        if(score > 16) {
            return;
        }

        for(String entry : scoreboard.getEntries()) {
            if(objective.getScore(entry).getScore() == score) {
                scoreboard.resetScores(entry);
                break;
            }
        }
    }

    public void clear() {
        for(String entry : scoreboard.getEntries()) {
            scoreboard.resetScores(entry);
        }
    }

    public Set<String> getEntries() {
        return Collections.unmodifiableSet(scoreboard.getEntries());
    }

    public void send(Player... players) {
        if(players != null) {
            send(Arrays.asList(players));
        }
    }

    public void send(List<Player> players) {
        for(Player player : players) {
            player.setScoreboard(scoreboard);
        }
    }
}