AkarinMC/src/main/java/net/minecraft/server/DragonControllerStrafe.java

package net.minecraft.server;

import javax.annotation.Nullable;
import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;

public class DragonControllerStrafe extends AbstractDragonController {

    private static final Logger b = LogManager.getLogger();
    private int c;
    private PathEntity d;
    private Vec3D e;
    private EntityLiving f;
    private boolean g;

    public DragonControllerStrafe(EntityEnderDragon entityenderdragon) {
        super(entityenderdragon);
    }

    public void c() {
        if (this.f == null) {
            DragonControllerStrafe.b.warn("Skipping player strafe phase because no player was found");
            this.a.getDragonControllerManager().setControllerPhase(DragonControllerPhase.HOLDING_PATTERN);
        } else {
            double d0;
            double d1;
            double d2;

            if (this.d != null && this.d.b()) {
                d0 = this.f.locX;
                d1 = this.f.locZ;
                double d3 = d0 - this.a.locX;
                double d4 = d1 - this.a.locZ;

                d2 = (double) MathHelper.sqrt(d3 * d3 + d4 * d4);
                double d5 = Math.min(0.4000000059604645D + d2 / 80.0D - 1.0D, 10.0D);

                this.e = new Vec3D(d0, this.f.locY + d5, d1);
            }

            d0 = this.e == null ? 0.0D : this.e.c(this.a.locX, this.a.locY, this.a.locZ);
            if (d0 < 100.0D || d0 > 22500.0D) {
                this.j();
            }

            d1 = 64.0D;
            if (this.f.h(this.a) < 4096.0D) {
                if (this.a.hasLineOfSight(this.f)) {
                    ++this.c;
                    Vec3D vec3d = (new Vec3D(this.f.locX - this.a.locX, 0.0D, this.f.locZ - this.a.locZ)).a();
                    Vec3D vec3d1 = (new Vec3D((double) MathHelper.sin(this.a.yaw * 0.017453292F), 0.0D, (double) (-MathHelper.cos(this.a.yaw * 0.017453292F)))).a();
                    float f = (float) vec3d1.b(vec3d);
                    float f1 = (float) (Math.acos((double) f) * 57.2957763671875D);

                    f1 += 0.5F;
                    if (this.c >= 5 && f1 >= 0.0F && f1 < 10.0F) {
                        d2 = 1.0D;
                        Vec3D vec3d2 = this.a.f(1.0F);
                        double d6 = this.a.bD.locX - vec3d2.x * 1.0D;
                        double d7 = this.a.bD.locY + (double) (this.a.bD.length / 2.0F) + 0.5D;
                        double d8 = this.a.bD.locZ - vec3d2.z * 1.0D;
                        double d9 = this.f.locX - d6;
                        double d10 = this.f.locY + (double) (this.f.length / 2.0F) - (d7 + (double) (this.a.bD.length / 2.0F));
                        double d11 = this.f.locZ - d8;

                        this.a.world.a((EntityHuman) null, 1017, new BlockPosition(this.a), 0);
                        EntityDragonFireball entitydragonfireball = new EntityDragonFireball(this.a.world, this.a, d9, d10, d11);

                        entitydragonfireball.setPositionRotation(d6, d7, d8, 0.0F, 0.0F);
                        if (new com.destroystokyo.paper.event.entity.EnderDragonShootFireballEvent((org.bukkit.entity.EnderDragon) a.getBukkitEntity(), (org.bukkit.entity.DragonFireball) entitydragonfireball.getBukkitEntity()).callEvent()) // Paper
                        this.a.world.addEntity(entitydragonfireball);
                        else entitydragonfireball.die(); // Paper
                        this.c = 0;
                        if (this.d != null) {
                            while (!this.d.b()) {
                                this.d.a();
                            }
                        }

                        this.a.getDragonControllerManager().setControllerPhase(DragonControllerPhase.HOLDING_PATTERN);
                    }
                } else if (this.c > 0) {
                    --this.c;
                }
            } else if (this.c > 0) {
                --this.c;
            }

        }
    }

    private void j() {
        if (this.d == null || this.d.b()) {
            int i = this.a.l();
            int j = i;

            if (this.a.getRandom().nextInt(8) == 0) {
                this.g = !this.g;
                j = i + 6;
            }

            if (this.g) {
                ++j;
            } else {
                --j;
            }

            if (this.a.getEnderDragonBattle() != null && this.a.getEnderDragonBattle().c() > 0) {
                j %= 12;
                if (j < 0) {
                    j += 12;
                }
            } else {
                j -= 12;
                j &= 7;
                j += 12;
            }

            this.d = this.a.a(i, j, (PathPoint) null);
            if (this.d != null) {
                this.d.a();
            }
        }

        this.k();
    }

    private void k() {
        if (this.d != null && !this.d.b()) {
            Vec3D vec3d = this.d.f();

            this.d.a();
            double d0 = vec3d.x;
            double d1 = vec3d.z;

            double d2;

            do {
                d2 = vec3d.y + (double) (this.a.getRandom().nextFloat() * 20.0F);
            } while (d2 < vec3d.y);

            this.e = new Vec3D(d0, d2, d1);
        }

    }

    public void d() {
        this.c = 0;
        this.e = null;
        this.d = null;
        this.f = null;
    }

    public void a(EntityLiving entityliving) {
        this.f = entityliving;
        int i = this.a.l();
        int j = this.a.k(this.f.locX, this.f.locY, this.f.locZ);
        int k = MathHelper.floor(this.f.locX);
        int l = MathHelper.floor(this.f.locZ);
        double d0 = (double) k - this.a.locX;
        double d1 = (double) l - this.a.locZ;
        double d2 = (double) MathHelper.sqrt(d0 * d0 + d1 * d1);
        double d3 = Math.min(0.4000000059604645D + d2 / 80.0D - 1.0D, 10.0D);
        int i1 = MathHelper.floor(this.f.locY + d3);
        PathPoint pathpoint = new PathPoint(k, i1, l);

        this.d = this.a.a(i, j, pathpoint);
        if (this.d != null) {
            this.d.a();
            this.k();
        }

    }

    @Nullable
    public Vec3D g() {
        return this.e;
    }

    public DragonControllerPhase<DragonControllerStrafe> getControllerPhase() {
        return DragonControllerPhase.STRAFE_PLAYER;
    }
}