GadgetBatBlaster.java

package be.isach.ultracosmetics.cosmetics.gadgets;

import be.isach.ultracosmetics.UltraCosmetics;
import be.isach.ultracosmetics.cosmetics.type.GadgetType;
import be.isach.ultracosmetics.player.UltraPlayer;
import be.isach.ultracosmetics.util.*;
import org.bukkit.Bukkit;
import org.bukkit.Location;
import org.bukkit.entity.Bat;
import org.bukkit.entity.Entity;
import org.bukkit.entity.Player;
import org.bukkit.util.Vector;

import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;

/**
 * Represents an instance of a bat blaster gadget summoned by a player.
 *
 * @author iSach
 * @since 08-03-2015
 */
public class GadgetBatBlaster extends Gadget {

	private boolean active = false;
	private Location playerVelocity;
	private List<Bat> bats;

	public GadgetBatBlaster(UltraPlayer owner, UltraCosmetics ultraCosmetics) {
		super(owner, GadgetType.BATBLASTER, ultraCosmetics);
	}

	@Override
	void onRightClick() {
		this.active = true;
		this.playerVelocity = getPlayer().getEyeLocation();
		this.bats = new ArrayList<>();

		for (int i = 0; i < 16; i++) {
			this.bats.add(getPlayer().getWorld().spawn(getPlayer().getEyeLocation(), Bat.class));
		}

		Bukkit.getScheduler().runTaskLaterAsynchronously(getUltraCosmetics(), this::clean, 60);
	}

	public boolean hitPlayer(Location location, Player player) {
		Vector locVec = location.add(0, -location.getY(), 0).toVector();
		Vector playerVec = player.getLocation().add(0, -player.getLocation().getY(), 0).toVector();
		double vecLength = locVec.subtract(playerVec).length();

		if (vecLength < 0.8D) {
			return true;
		}

		if (vecLength < 1.2) {
			if ((location.getY() > player.getLocation().getY()) && (location.getY() < player.getEyeLocation().getY())) {
				return true;
			}
		}

		return false;
	}

	@Override
	public void onUpdate() {
		if (active) {
			bats.stream().filter(Entity::isValid).forEachOrdered(bat -> {
				Vector rand = new Vector((Math.random() - 0.5D) / 3.0D, (Math.random() - 0.5D) / 3.0D,
						(Math.random() - 0.5D) / 3.0D);
				if (bat != null && playerVelocity != null) {
					bat.setVelocity(playerVelocity.getDirection().clone().multiply(0.5D).add(rand));
				}
				getPlayer().getWorld().getPlayers().stream()
						.filter(other -> !other.equals(getPlayer()) && getOwner().hasGadgetsEnabled() && hitPlayer(
								bat.getLocation(), other)).forEachOrdered(other -> {

					Vector v = bat.getLocation().getDirection();
					v.normalize();
					v.multiply(.4d);
					v.setY(v.getY() + 0.2d);

					if (v.getY() > 7.5) {
						v.setY(7.5);
					}

					if (other.isOnGround()) {
						v.setY(v.getY() + 0.4d);
					}

					other.setFallDistance(0);

					if (affectPlayers) {
						MathUtils.applyVelocity(other, bat.getLocation().getDirection().add(new Vector(0, .4f, 0)));
					}

					SoundUtil.playSound(bat.getLocation(), Sounds.BAT_HURT, 1.0f, 1.0f);
					UtilParticles.display(Particles.SMOKE_NORMAL, bat.getLocation());

					bat.remove();
				});
			});
		} else {
			playerVelocity = null;
			clean();
		}
	}

	private void clean() {
		active = false;
		playerVelocity = null;
		if (bats != null) {
			synchronized (bats) {
				for (Iterator<Bat> iterator = bats.iterator(); iterator.hasNext(); ) {
					Bat bat = iterator.next();
					if (bat.isValid()) {
						UtilParticles.display(Particles.SMOKE_LARGE, bat.getLocation());
					}
					bat.remove();
					iterator.remove();
				}
			}
			bats.clear();
		}
	}

	@Override
	public void onClear() {
		clean();
	}

	@Override
	void onLeftClick() {
	}
}