Grappler

package me.filipenock.Addon.Habilidades;

import java.util.HashMap;
import java.util.Map;

import org.bukkit.Material;
import org.bukkit.craftbukkit.v1_8_R3.CraftWorld;
import org.bukkit.craftbukkit.v1_8_R3.entity.CraftPlayer;
import org.bukkit.entity.Player;
import org.bukkit.event.EventHandler;
import org.bukkit.event.Listener;
import org.bukkit.event.block.Action;
import org.bukkit.event.entity.EntityDamageEvent;
import org.bukkit.event.entity.PlayerLeashEntityEvent;
import org.bukkit.event.player.PlayerInteractEvent;
import org.bukkit.event.player.PlayerItemHeldEvent;
import org.bukkit.event.player.PlayerMoveEvent;
import org.bukkit.util.Vector;

import me.filipenock.Addon.Main;
import me.filipenock.Addon.kit.KitAPI;
import net.minecraft.server.v1_8_R3.EntityHuman;
import net.minecraft.server.v1_8_R3.World;

public class Grappler implements Listener
{
    private Main plugin;
    Map<Player, CopyOfFishingHook> hooks;

    public Grappler(final Main plugin) {
        this.hooks = new HashMap<Player, CopyOfFishingHook>();
        this.plugin = plugin;
    }

    public Grappler() {
        this.hooks = new HashMap<Player, CopyOfFishingHook>();
    }

    @EventHandler
    public void onSlot(final PlayerItemHeldEvent e) {
        final Player p = e.getPlayer();
        if (KitAPI.grappler.contains(p.getName()) && this.hooks.containsKey(e.getPlayer())) {
            this.hooks.get(e.getPlayer()).remove();
            this.hooks.remove(e.getPlayer());
        }
    }

    @EventHandler
    public void onMove(final PlayerMoveEvent e) {
        final Player p = e.getPlayer();
        if (KitAPI.grappler.contains(p.getName()) && this.hooks.containsKey(e.getPlayer()) && !e.getPlayer().getItemInHand().getType().equals((Object)Material.LEASH)) {
            this.hooks.get(e.getPlayer()).remove();
            this.hooks.remove(e.getPlayer());
        }
    }

    @EventHandler
    public void onLeash(final PlayerLeashEntityEvent e) {
        final Player p = e.getPlayer();
        if (KitAPI.grappler.contains(p.getName()) && e.getPlayer().getItemInHand().getType().equals((Object)Material.LEASH)) {
            e.setCancelled(true);
            e.getPlayer().updateInventory();
            e.setCancelled(true);
            if (!this.hooks.containsKey(p)) {
                return;
            }
            if (!this.hooks.get(p).isHooked()) {
                return;
            }
            final double t;
            final double d = t = this.hooks.get(p).getBukkitEntity().getLocation().distance(p.getLocation());
            final double v_x = (1.0 + 0.07 * t) * (this.hooks.get(p).getBukkitEntity().getLocation().getX() - p.getLocation().getX()) / t;
            final double v_y = (1.0 + 0.03 * t) * (this.hooks.get(p).getBukkitEntity().getLocation().getY() - p.getLocation().getY()) / t;
            final double v_z = (1.0 + 0.07 * t) * (this.hooks.get(p).getBukkitEntity().getLocation().getZ() - p.getLocation().getZ()) / t;
            final Vector v = p.getVelocity();
            v.setX(v_x);
            v.setY(v_y);
            v.setZ(v_z);
            p.setVelocity(v);
        }
    }

    @EventHandler
    public void onDamageByFall(final EntityDamageEvent e) {
        if (e.getEntity() instanceof Player) {
            final Player player = (Player)e.getEntity();
            if (!KitAPI.grappler.contains(player.getName()) || e.getCause() != EntityDamageEvent.DamageCause.FALL) {
                return;
            }
            if (!this.hooks.containsKey(player)) {
                return;
            }
            if (this.hooks.get(player).isHooked()) {
                e.setDamage(e.getDamage() / 10.0);
            }
        }
    }

    @EventHandler
    public void onClick(final PlayerInteractEvent e) {
        final Player p = e.getPlayer();
        if (KitAPI.grappler.contains(p.getName()) && e.getPlayer().getItemInHand().getType().equals((Object)Material.LEASH)) {
            e.setCancelled(true);
            if (e.getAction() == Action.LEFT_CLICK_AIR || e.getAction() == Action.LEFT_CLICK_BLOCK) {
                if (this.hooks.containsKey(p)) {
                    this.hooks.get(p).remove();
                }
                final CopyOfFishingHook nmsHook = new CopyOfFishingHook((CraftWorld) p.getWorld(), (EntityHuman)((CraftPlayer)p).getHandle());
                nmsHook.spawn(p.getEyeLocation().add(p.getLocation().getDirection().getX(), p.getLocation().getDirection().getY(), p.getLocation().getDirection().getZ()));
                nmsHook.move(p.getLocation().getDirection().getX() * 5.0, p.getLocation().getDirection().getY() * 5.0, p.getLocation().getDirection().getZ() * 5.0);
                this.hooks.put(p, nmsHook);
            }
            else {
                if (!this.hooks.containsKey(p)) {
                    return;
                }
                if (!this.hooks.get(p).isHooked()) {
                    return;
                }
                final double t;
                final double d = t = this.hooks.get(p).getBukkitEntity().getLocation().distance(p.getLocation());
                final double v_x = (1.0 + 0.07 * t) * (this.hooks.get(p).getBukkitEntity().getLocation().getX() - p.getLocation().getX()) / t;
                final double v_y = (1.0 + 0.03 * t) * (this.hooks.get(p).getBukkitEntity().getLocation().getY() - p.getLocation().getY()) / t;
                final double v_z = (1.0 + 0.07 * t) * (this.hooks.get(p).getBukkitEntity().getLocation().getZ() - p.getLocation().getZ()) / t;
                final Vector v = p.getVelocity();
                v.setX(v_x);
                v.setY(v_y);
                v.setZ(v_z);
                p.setVelocity(v);
            }
        }
    }
}