package me.belka;

import java.util.HashMap;
import java.util.Map;
import java.util.Map.Entry;
import java.util.UUID;

import org.bukkit.Bukkit;
import org.bukkit.entity.Player;
import org.bukkit.event.EventHandler;
import org.bukkit.event.player.PlayerJoinEvent;
import org.bukkit.event.player.PlayerQuitEvent;
import org.bukkit.event.player.PlayerRespawnEvent;

public class SkinChanger {

private static Map<String, String> changedSkins = new HashMap<>();

public static void changeSkin(Player p, String name) {
RefClass classCraftPlayer = ReflectionUtil.getRefClass("{cb}.entity.CraftPlayer");
RefMethod methodGetHandle = classCraftPlayer.getMethod("getHandle");
RefClass classEntityPlayer = ReflectionUtil.getRefClass("{nms}.EntityPlayer");
RefField fieldPlayerConnection = classEntityPlayer.getField("playerConnection");
RefClass classPlayerConnection = ReflectionUtil.getRefClass("{nms}.PlayerConnection");
RefMethod methodSendPacket = classPlayerConnection.findMethodByName("sendPacket");

RefClass p29 = ReflectionUtil.getRefClass("{nms}.PacketPlayOutEntityDestroy");

RefClass p20 = ReflectionUtil.getRefClass("{nms}.PacketPlayOutNamedEntitySpawn");

RefConstructor pp20 = p20.getConstructor(ReflectionUtil.getRefClass("{nms}.EntityHuman"));

RefConstructor pp29 = p29.getConstructor(int[].class);

int[] entityId;

entityId = new int[1];

entityId[0] = p.getEntityId();

Object packetEntityDestroy = pp29.create(entityId);

Object packetNamedEntitySpawn = pp20.create((ReflectionUtil.getRefClass("{cb}.entity.CraftPlayer")).getMethod("getHandle").of(p).call());

RefField f = p20.getField("b");

RefClass gp = ReflectionUtil.getRefClass("{nm}.util.com.mojang.authlib.GameProfile");

RefConstructor rc = gp.getConstructor(UUID.class, String.class);

Object gameProfile = rc.create(p.getUniqueId(), name);

f.of(packetNamedEntitySpawn).set(gameProfile);

changedSkins.put(p.getName(), name);

p.setDisplayName(name);
p.setPlayerListName(name);

for (Player player : Bukkit.getOnlinePlayers()) {

if(player != p) {
Object handle = methodGetHandle.of(player).call();
Object connection = fieldPlayerConnection.of(handle).get();

methodSendPacket.of(connection).call(packetEntityDestroy);
methodSendPacket.of(connection).call(packetNamedEntitySpawn);
}
}
}

public static void removeSkin(Player p) {
RefClass classCraftPlayer = ReflectionUtil.getRefClass("{cb}.entity.CraftPlayer");
RefMethod methodGetHandle = classCraftPlayer.getMethod("getHandle");
RefClass classEntityPlayer = ReflectionUtil.getRefClass("{nms}.EntityPlayer");
RefField fieldPlayerConnection = classEntityPlayer.getField("playerConnection");
RefClass classPlayerConnection = ReflectionUtil.getRefClass("{nms}.PlayerConnection");
RefMethod methodSendPacket = classPlayerConnection.findMethodByName("sendPacket");

RefClass p29 = ReflectionUtil.getRefClass("{nms}.PacketPlayOutEntityDestroy");

RefClass p20 = ReflectionUtil.getRefClass("{nms}.PacketPlayOutNamedEntitySpawn");

RefConstructor pp20 = p20.getConstructor(ReflectionUtil.getRefClass("{nms}.EntityHuman"));

RefConstructor pp29 = p29.getConstructor(int[].class);

int[] entityId;

entityId = new int[1];

entityId[0] = p.getEntityId();

Object packetEntityDestroy = pp29.create(entityId);

Object packetNamedEntitySpawn = pp20.create((ReflectionUtil.getRefClass("{cb}.entity.CraftPlayer")).getMethod("getHandle").of(p).call());

RefField f = p20.getField("b");

RefClass gp = ReflectionUtil.getRefClass("{nm}.util.com.mojang.authlib.GameProfile");

RefConstructor rc = gp.getConstructor(UUID.class, String.class);

Object gameProfile = rc.create(p.getUniqueId(), p.getName());

f.of(packetNamedEntitySpawn).set(gameProfile);

changedSkins.remove(p.getName());

p.setDisplayName(p.getName());
p.setPlayerListName(p.getName());

for (Player player : Bukkit.getOnlinePlayers()) {

if(player != p) {
Object handle = methodGetHandle.of(player).call();
Object connection = fieldPlayerConnection.of(handle).get();

methodSendPacket.of(connection).call(packetEntityDestroy);
methodSendPacket.of(connection).call(packetNamedEntitySpawn);
}
}
}

@SuppressWarnings("deprecation")
public static Player[] getPlayersChangedSkins() {
for(int i = 0; i < changedSkins.size(); i++) {
Player[] changed = new Player[changedSkins.size()];

for(Entry<String, String> entry : changedSkins.entrySet()) {
changed[i] = Bukkit.getPlayer(entry.getKey());
return changed;
}
}
return null;
}

public static String getNewPlayerName(Player p) {
if(changedSkins.containsKey(p.getName())) {
return changedSkins.get(p.getName());
}
return null;
}

public static String getOldPlayerName(String name) {
for(Entry<String, String> entry : changedSkins.entrySet()) {
if(entry.getValue().equals(name)) {
return entry.getKey();
}
}
return null;
}

@EventHandler
public void onRespawn(final PlayerRespawnEvent e) {
changeSkin(e.getPlayer(), getNewPlayerName(e.getPlayer()));
}

@EventHandler
public void onLeave(PlayerQuitEvent e) {
Player p = e.getPlayer();
if (isDisguised(p)) {
removeSkin(p);
}
}

@EventHandler
public void onJoin(PlayerJoinEvent e) {
changeSkin(e.getPlayer(), getNewPlayerName(e.getPlayer()));
}

public static boolean isDisguised(Player p) {
return changedSkins.containsKey(p.getName());
}

}