package me.thezombiepl.tzp_tab;

import java.lang.reflect.Field;
import java.util.ArrayList;
import java.util.List;

import org.bukkit.Bukkit;
import org.bukkit.ChatColor;
import org.bukkit.craftbukkit.v1_16_R2.entity.CraftPlayer;
import org.bukkit.entity.Player;

import net.minecraft.server.v1_16_R2.ChatComponentText;
import net.minecraft.server.v1_16_R2.PacketPlayOutPlayerListHeaderFooter;


public class TabManager {

    private List<String> headers = new ArrayList<>();
    private List<String> footers = new ArrayList<>();
    
    private AnimatedTab plugin;
    public TabManager(AnimatedTab plugin) {
        this.plugin = plugin;
    }
    
    public void showTab() {
        if (headers.isEmpty() && footers.isEmpty())
            return;
        
        Bukkit.getScheduler().scheduleSyncRepeatingTask(plugin, new Runnable() {

            PacketPlayOutPlayerListHeaderFooter packet = new PacketPlayOutPlayerListHeaderFooter();
            int count1 = 0; //header
            int count2 = 0; //footers
            
            @Override
            public void run() {
                if (Bukkit.getOnlinePlayers().size() == 0) return;
                for (Player player : Bukkit.getOnlinePlayers()) {
                    try {
                        Field a = packet.getClass().getDeclaredField("header");
                        a.setAccessible(true);
                        Field b = packet.getClass().getDeclaredField("footer");
                        b.setAccessible(true);
                        
                        if (count1 >= headers.size())
                            count1 = 0;
                        if (count2 >= footers.size())
                            count2 = 0;
                        a.set(packet, new ChatComponentText(format(headers.get(count1)).replaceAll("\\{PLAYER\\}", player.getDisplayName())));
                        b.set(packet, new ChatComponentText(format(footers.get(count2)).replaceAll("\\{PLAYER\\}", player.getDisplayName())));
                        count1++;
                        count2++;
                    
                    } catch (NoSuchFieldException | IllegalAccessException e) {
                        e.printStackTrace();
                    }
                    ((CraftPlayer) player).getHandle().playerConnection.sendPacket(packet);
                }
            }
            
        }, 10, 40);
    }
    public void addHeader(String header) {
        headers.add(header);
    }
    public void addFooter(String footer) {
        footers.add(footer);
    }
    private String format(String msg) {
        msg = msg.replaceAll("\\{ONLINE\\}", String.valueOf(Bukkit.getOnlinePlayers().size()));
        return ChatColor.translateAlternateColorCodes('&', msg);
    }
}