package fr.dorvak.ia.utils;

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

import org.bukkit.craftbukkit.v1_8_R3.entity.CraftPlayer;
import org.bukkit.entity.Player;

import fr.dorvak.ia.Main;
import fr.dorvak.ia.twitch.TwitchInventory;
import io.netty.channel.Channel;
import io.netty.channel.ChannelHandlerContext;
import io.netty.handler.codec.MessageToMessageDecoder;
import net.minecraft.server.v1_8_R3.Packet;

public class PacketReader {

    Player player;
    Channel channel;

    public PacketReader(Player player) {
        this.player = player;
    }

    public void inject() {
        CraftPlayer cPlayer = (CraftPlayer)this.player;
        channel = cPlayer.getHandle().playerConnection.networkManager.channel;

        channel.pipeline().addAfter("decoder", "PacketInjector", new MessageToMessageDecoder<Packet<?>>() {

            @Override
            protected void decode(ChannelHandlerContext arg0, Packet<?> packet, List<Object> arg2) throws Exception {
                arg2.add(packet);
                readPacket(packet);
            }
        });
    }

    public void unInject() {
        if(channel.pipeline().get("PacketInjector") != null) {
            channel.pipeline().remove("PacketInjector");
        }
    }

    public void readPacket(Packet<?> packet) {
        if(packet.getClass().getSimpleName().equalsIgnoreCase("PacketPlayInUseEntity")) {
            int id = (Integer)getValue(packet, "a");

            TwitchInventory twitchInventory = new TwitchInventory(player);

            if(Main.ncpTwitch.getEntityID() == id) {
                if(getValue(packet, "action").toString().equalsIgnoreCase("ATTACK")) {
                    twitchInventory.open();
                    System.out.println("attack");
                } else if(getValue(packet, "action").toString().equalsIgnoreCase("INTERACT_AT")) {
                    twitchInventory.open();
                }
            }
        }
    }

    public void setValue(Object obj, String name, Object value) {
        try {
            Field field = obj.getClass().getDeclaredField(name);
            field.setAccessible(true);
            field.set(obj, value);
        } catch (Exception e) {}
    }

    public Object getValue(Object obj, String name) {
        try {
            Field field = obj.getClass().getDeclaredField(name);
            field.setAccessible(true);
            return field.get(obj);
        } catch (Exception e) {}
        return null;
    }
}