package me.antihack.principal;

import java.lang.reflect.Field;
import java.util.List;
import java.util.Random;
import java.util.UUID;
import net.minecraft.server.v1_8_R1.DataWatcher;
import net.minecraft.server.v1_8_R1.EnumGamemode;
import net.minecraft.server.v1_8_R1.EnumPlayerInfoAction;
import net.minecraft.server.v1_8_R1.PacketPlayOutEntityDestroy;
import net.minecraft.server.v1_8_R1.PacketPlayOutEntityEquipment;
import net.minecraft.server.v1_8_R1.PacketPlayOutEntityTeleport;
import net.minecraft.server.v1_8_R1.PacketPlayOutNamedEntitySpawn;
import net.minecraft.server.v1_8_R1.PacketPlayOutPlayerInfo;
import net.minecraft.server.v1_8_R1.PlayerInfoData;
import org.bukkit.Bukkit;
import org.bukkit.Location;
import org.bukkit.Material;
import org.bukkit.craftbukkit.v1_8_R1.entity.CraftPlayer;
import org.bukkit.craftbukkit.v1_8_R1.inventory.CraftItemStack;
import org.bukkit.craftbukkit.v1_8_R1.util.CraftChatMessage;
import org.bukkit.entity.Player;
import org.bukkit.inventory.ItemStack;
import com.mojang.authlib.GameProfile;

public class NPC {

    private DataWatcher watcher;
    private Material chestplate;
    private Material leggings;
    private Location location;
    private Material inHand;
    private Material helmet;
    private Material boots;
    private String tablist;
    private int entityID;
    private String name;
    private UUID uuid;

    public NPC(String name, String tablist, UUID uuid, int entityID, Location location, Material inHand) {
        this.location = location;
        this.tablist = tablist;
        this.name = name;
        this.uuid = uuid;
        this.entityID = entityID;
        this.inHand = inHand;
        this.watcher = new DataWatcher(null);
        watcher.a(6, (float) 20);
    }

    public NPC(String name, Location location) {
        this(name, name, UUID.randomUUID(), new Random().nextInt(10000), location, Material.AIR);
    }

    public NPC(String name, Location location, Material inHand) {
        this(name, name, UUID.randomUUID(), new Random().nextInt(10000), location, inHand);
    }

    public NPC(String name, String tablist, Location location) {
        this(name, tablist, UUID.randomUUID(), new Random().nextInt(10000), location, Material.AIR);
    }

    public NPC(String name, String tablist, Location location, Material inHand) {
        this(name, tablist, UUID.randomUUID(), new Random().nextInt(10000), location, inHand);
    }

    @SuppressWarnings("deprecation")
    public void spawn(Player online) {
        try {
            PacketPlayOutNamedEntitySpawn packet = new PacketPlayOutNamedEntitySpawn();
            this.addToTablist();

            this.setValue(packet, "a", this.entityID);
            this.setValue(packet, "b", this.uuid);
            this.setValue(packet, "c", this.toFixedPoint(this.location.getX()));
            this.setValue(packet, "d", this.toFixedPoint(this.location.getY()));
            this.setValue(packet, "e", this.toFixedPoint(this.location.getZ()));
            this.setValue(packet, "f", this.toPackedByte(this.location.getYaw()));
            this.setValue(packet, "g", this.toPackedByte(this.location.getPitch()));
            this.setValue(packet, "h", this.inHand == null ? 0 : this.inHand.getId());
            this.setValue(packet, "i", this.watcher);
            ((CraftPlayer) online).getHandle().playerConnection.sendPacket(packet);
        } catch(Exception e) {
            e.printStackTrace();
        }
    }

    @SuppressWarnings("deprecation")
    public void despawn() {
        PacketPlayOutEntityDestroy packet = new PacketPlayOutEntityDestroy(new int[] { this.entityID });
        this.removeFromTablist();
        for(Player online : Bukkit.getOnlinePlayers()) {
            ((CraftPlayer) online).getHandle().playerConnection.sendPacket(packet);
        }
    }

    @SuppressWarnings("deprecation")
    public void changePlayerlistName(String name) {
        try {
            PacketPlayOutPlayerInfo packet = new PacketPlayOutPlayerInfo();
            PlayerInfoData data = new PlayerInfoData(packet, new GameProfile(this.uuid, this.name), 0, EnumGamemode.NOT_SET, CraftChatMessage.fromString(name)[0]);
            @SuppressWarnings("unchecked")
            List<PlayerInfoData> players = (List<PlayerInfoData>) this.getValue(packet, "b");
            players.add(data);

            this.setValue(packet, "a", EnumPlayerInfoAction.UPDATE_DISPLAY_NAME);
            this.setValue(packet, "b", players);
            this.tablist = name;

            for(Player online : Bukkit.getOnlinePlayers()) {
                ((CraftPlayer) online).getHandle().playerConnection.sendPacket(packet);
            }
        } catch(Exception e) {
            e.printStackTrace();
        }
    }

    @SuppressWarnings("deprecation")
    private void addToTablist() {
        try {
            PacketPlayOutPlayerInfo packet = new PacketPlayOutPlayerInfo();
            PlayerInfoData data = new PlayerInfoData(packet, new GameProfile(this.uuid, this.name), 0, EnumGamemode.NOT_SET, CraftChatMessage.fromString(this.tablist)[0]);
            @SuppressWarnings("unchecked")
            List<PlayerInfoData> players = (List<PlayerInfoData>) this.getValue(packet, "b");
            players.add(data);

            this.setValue(packet, "a", EnumPlayerInfoAction.ADD_PLAYER);
            this.setValue(packet, "b", players);

            for(Player online : Bukkit.getOnlinePlayers()) {
                ((CraftPlayer) online).getHandle().playerConnection.sendPacket(packet);
            }
        } catch(Exception e) {
            e.printStackTrace();
        }
    }

    @SuppressWarnings("deprecation")
    private void removeFromTablist() {
        try {
            PacketPlayOutPlayerInfo packet = new PacketPlayOutPlayerInfo();
            PlayerInfoData data = new PlayerInfoData(packet, new GameProfile(this.uuid, this.name), 0, EnumGamemode.NOT_SET, CraftChatMessage.fromString(this.tablist)[0]);
            @SuppressWarnings("unchecked")
            List<PlayerInfoData> players = (List<PlayerInfoData>) this.getValue(packet, "b");
            players.add(data);

            this.setValue(packet, "a", EnumPlayerInfoAction.REMOVE_PLAYER);
            this.setValue(packet, "b", players);

            for(Player online : Bukkit.getOnlinePlayers()) {
                ((CraftPlayer) online).getHandle().playerConnection.sendPacket(packet);
            }
        } catch(Exception e) {
            e.printStackTrace();
        }
    }

    @SuppressWarnings("deprecation")
    public void teleport(Location location) {
        try {
            PacketPlayOutEntityTeleport packet = new PacketPlayOutEntityTeleport();

            this.setValue(packet, "a", this.entityID);
            this.setValue(packet, "b", this.toFixedPoint(location.getX()));
            this.setValue(packet, "c", this.toFixedPoint(location.getY()));
            this.setValue(packet, "d", this.toFixedPoint(location.getZ()));
            this.setValue(packet, "e", this.toPackedByte(location.getYaw()));
            this.setValue(packet, "f", this.toPackedByte(location.getPitch()));
            this.setValue(packet, "g", this.location.getBlock().getType() == Material.AIR ? false : true);
            this.location = location;

            for(Player online : Bukkit.getOnlinePlayers()) {
                ((CraftPlayer) online).getHandle().playerConnection.sendPacket(packet);
            }
        } catch(Exception e) {
            e.printStackTrace();
        }
    }

    @SuppressWarnings("deprecation")
    public void setItemInHand(Material material) {
        try {
            PacketPlayOutEntityEquipment packet = new PacketPlayOutEntityEquipment();

            this.setValue(packet, "a", this.entityID);
            this.setValue(packet, "b", 0);
            this.setValue(packet, "c", material == Material.AIR || material == null ? CraftItemStack.asNMSCopy(new ItemStack(Material.AIR)) : CraftItemStack.asNMSCopy(new ItemStack(material)));
            this.inHand = material;

            for(Player online : Bukkit.getOnlinePlayers()) {
                ((CraftPlayer) online).getHandle().playerConnection.sendPacket(packet);
            }
        } catch(Exception e) {
            e.printStackTrace();
        }
    }

    public Material getItemInHand() {
        return this.inHand;
    }

    @SuppressWarnings("deprecation")
    public void setHelmet(Material material) {
        try {
            PacketPlayOutEntityEquipment packet = new PacketPlayOutEntityEquipment();

            this.setValue(packet, "a", this.entityID);
            this.setValue(packet, "b", 4);
            this.setValue(packet, "c", material == Material.AIR || material == null ? CraftItemStack.asNMSCopy(new ItemStack(Material.AIR)) : CraftItemStack.asNMSCopy(new ItemStack(material)));
            this.helmet = material;

            for(Player online : Bukkit.getOnlinePlayers()) {
                ((CraftPlayer) online).getHandle().playerConnection.sendPacket(packet);
            }
        } catch(Exception e) {
            e.printStackTrace();
        }
    }

    public Material getHelmet() {
        return this.helmet;
    }

    @SuppressWarnings("deprecation")
    public void setChestplate(Material material) {
        try {
            PacketPlayOutEntityEquipment packet = new PacketPlayOutEntityEquipment();

            this.setValue(packet, "a", this.entityID);
            this.setValue(packet, "b", 3);
            this.setValue(packet, "c", material == Material.AIR || material == null ? CraftItemStack.asNMSCopy(new ItemStack(Material.AIR)) : CraftItemStack.asNMSCopy(new ItemStack(material)));
            this.chestplate = material;

            for(Player online : Bukkit.getOnlinePlayers()) {
                ((CraftPlayer) online).getHandle().playerConnection.sendPacket(packet);
            }
        } catch(Exception e) {
            e.printStackTrace();
        }
    }

    public Material getChestplate() {
        return this.chestplate;
    }

    @SuppressWarnings("deprecation")
    public void setLeggings(Material material) {
        try {
            PacketPlayOutEntityEquipment packet = new PacketPlayOutEntityEquipment();

            this.setValue(packet, "a", this.entityID);
            this.setValue(packet, "b", 2);
            this.setValue(packet, "c", material == Material.AIR || material == null ? CraftItemStack.asNMSCopy(new ItemStack(Material.AIR)) : CraftItemStack.asNMSCopy(new ItemStack(material)));
            this.leggings = material;

            for(Player online : Bukkit.getOnlinePlayers()) {
                ((CraftPlayer) online).getHandle().playerConnection.sendPacket(packet);
            }
        } catch(Exception e) {
            e.printStackTrace();
        }
    }

    public Material getLeggings() {
        return this.leggings;
    }

    @SuppressWarnings("deprecation")
    public void setBoots(Material material) {
        try {
            PacketPlayOutEntityEquipment packet = new PacketPlayOutEntityEquipment();

            this.setValue(packet, "a", this.entityID);
            this.setValue(packet, "b", 1);
            this.setValue(packet, "c", material == Material.AIR || material == null ? CraftItemStack.asNMSCopy(new ItemStack(Material.AIR)) : CraftItemStack.asNMSCopy(new ItemStack(material)));
            this.boots = material;

            for(Player online : Bukkit.getOnlinePlayers()) {
                ((CraftPlayer) online).getHandle().playerConnection.sendPacket(packet);
            }
        } catch(Exception e) {
            e.printStackTrace();
        }
    }

    public Material getBoots() {
        return this.boots;
    }

    public int getEntityID() {
        return this.entityID;
    }

    public UUID getUUID() {
        return this.uuid;
    }

    public Location getLocation() {
        return this.location;
    }

    public String getName() {
        return this.name;
    }

    public String getPlayerlistName() {
        return this.tablist;
    }

    private void setValue(Object instance, String field, Object value) throws Exception {
        Field f = instance.getClass().getDeclaredField(field);
        f.setAccessible(true);
        f.set(instance, value);
    }

    private Object getValue(Object instance, String field) throws Exception {
        Field f = instance.getClass().getDeclaredField(field);
        f.setAccessible(true);
        return f.get(instance);
    }

    private int toFixedPoint(double d) {
        return (int) (d * 32.0);
    }

    private byte toPackedByte(float f) {
        return (byte) ((int) (f * 256.0F / 360.0F));
    }

}