package net.minecraft.world.entity.monster;

import java.util.EnumSet;
import net.minecraft.core.BlockPos;
import net.minecraft.nbt.CompoundTag;
import net.minecraft.network.syncher.EntityDataAccessor;
import net.minecraft.network.syncher.EntityDataSerializers;
import net.minecraft.network.syncher.SynchedEntityData;
import net.minecraft.sounds.SoundEvent;
import net.minecraft.sounds.SoundEvents;
import net.minecraft.util.Mth;
import net.minecraft.util.RandomSource;
import net.minecraft.world.DifficultyInstance;
import net.minecraft.world.damagesource.DamageSource;
import net.minecraft.world.entity.Entity;
import net.minecraft.world.entity.EntitySpawnReason;
import net.minecraft.world.entity.EntityType;
import net.minecraft.world.entity.EquipmentSlot;
import net.minecraft.world.entity.LivingEntity;
import net.minecraft.world.entity.Mob;
import net.minecraft.world.entity.PathfinderMob;
import net.minecraft.world.entity.SpawnGroupData;
import net.minecraft.world.entity.TraceableEntity;
import net.minecraft.world.entity.ai.attributes.Attributes;
import net.minecraft.world.entity.ai.attributes.AttributeSupplier.Builder;
import net.minecraft.world.entity.ai.control.MoveControl;
import net.minecraft.world.entity.ai.goal.FloatGoal;
import net.minecraft.world.entity.ai.goal.Goal;
import net.minecraft.world.entity.ai.goal.LookAtPlayerGoal;
import net.minecraft.world.entity.ai.goal.Goal.Flag;
import net.minecraft.world.entity.ai.goal.target.HurtByTargetGoal;
import net.minecraft.world.entity.ai.goal.target.NearestAttackableTargetGoal;
import net.minecraft.world.entity.ai.goal.target.TargetGoal;
import net.minecraft.world.entity.ai.targeting.TargetingConditions;
import net.minecraft.world.entity.player.Player;
import net.minecraft.world.entity.raid.Raider;
import net.minecraft.world.item.ItemStack;
import net.minecraft.world.item.Items;
import net.minecraft.world.level.Level;
import net.minecraft.world.level.ServerLevelAccessor;
import net.minecraft.world.phys.Vec3;
import org.jetbrains.annotations.Nullable;

public class Vex extends Monster implements TraceableEntity {
	public static final float FLAP_DEGREES_PER_TICK = 45.836624F;
	public static final int TICKS_PER_FLAP = Mth.ceil((float) (Math.PI * 5.0 / 4.0));
	protected static final EntityDataAccessor<Byte> DATA_FLAGS_ID = SynchedEntityData.defineId(Vex.class, EntityDataSerializers.BYTE);
	private static final int FLAG_IS_CHARGING = 1;
	@Nullable
	Mob owner;
	@Nullable
	private BlockPos boundOrigin;
	private boolean hasLimitedLife;
	private int limitedLifeTicks;

	public Vex(EntityType<? extends Vex> entityType, Level level) {
		super(entityType, level);
		this.moveControl = new Vex.VexMoveControl(this);
		this.xpReward = 3;
	}

	@Override
	public boolean isFlapping() {
		return this.tickCount % TICKS_PER_FLAP == 0;
	}

	@Override
	protected boolean isAffectedByBlocks() {
		return !this.isRemoved();
	}

	@Override
	public void tick() {
		this.noPhysics = true;
		super.tick();
		this.noPhysics = false;
		this.setNoGravity(true);
		if (this.hasLimitedLife && --this.limitedLifeTicks <= 0) {
			this.limitedLifeTicks = 20;
			this.hurt(this.damageSources().starve(), 1.0F);
		}
	}

	@Override
	protected void registerGoals() {
		super.registerGoals();
		this.goalSelector.addGoal(0, new FloatGoal(this));
		this.goalSelector.addGoal(4, new Vex.VexChargeAttackGoal());
		this.goalSelector.addGoal(8, new Vex.VexRandomMoveGoal());
		this.goalSelector.addGoal(9, new LookAtPlayerGoal(this, Player.class, 3.0F, 1.0F));
		this.goalSelector.addGoal(10, new LookAtPlayerGoal(this, Mob.class, 8.0F));
		this.targetSelector.addGoal(1, new HurtByTargetGoal(this, Raider.class).setAlertOthers());
		this.targetSelector.addGoal(2, new Vex.VexCopyOwnerTargetGoal(this));
		this.targetSelector.addGoal(3, new NearestAttackableTargetGoal(this, Player.class, true));
	}

	public static Builder createAttributes() {
		return Monster.createMonsterAttributes().add(Attributes.MAX_HEALTH, 14.0).add(Attributes.ATTACK_DAMAGE, 4.0);
	}

	@Override
	protected void defineSynchedData(net.minecraft.network.syncher.SynchedEntityData.Builder builder) {
		super.defineSynchedData(builder);
		builder.define(DATA_FLAGS_ID, (byte)0);
	}

	@Override
	public void readAdditionalSaveData(CompoundTag tag) {
		super.readAdditionalSaveData(tag);
		if (tag.contains("BoundX")) {
			this.boundOrigin = new BlockPos(tag.getInt("BoundX"), tag.getInt("BoundY"), tag.getInt("BoundZ"));
		}

		if (tag.contains("LifeTicks")) {
			this.setLimitedLife(tag.getInt("LifeTicks"));
		}
	}

	@Override
	public void restoreFrom(Entity entity) {
		super.restoreFrom(entity);
		if (entity instanceof Vex vex) {
			this.owner = vex.getOwner();
		}
	}

	@Override
	public void addAdditionalSaveData(CompoundTag tag) {
		super.addAdditionalSaveData(tag);
		if (this.boundOrigin != null) {
			tag.putInt("BoundX", this.boundOrigin.getX());
			tag.putInt("BoundY", this.boundOrigin.getY());
			tag.putInt("BoundZ", this.boundOrigin.getZ());
		}

		if (this.hasLimitedLife) {
			tag.putInt("LifeTicks", this.limitedLifeTicks);
		}
	}

	@Nullable
	public Mob getOwner() {
		return this.owner;
	}

	@Nullable
	public BlockPos getBoundOrigin() {
		return this.boundOrigin;
	}

	public void setBoundOrigin(@Nullable BlockPos boundOrigin) {
		this.boundOrigin = boundOrigin;
	}

	private boolean getVexFlag(int mask) {
		int i = this.entityData.get(DATA_FLAGS_ID);
		return (i & mask) != 0;
	}

	private void setVexFlag(int mask, boolean value) {
		int i = this.entityData.get(DATA_FLAGS_ID);
		if (value) {
			i |= mask;
		} else {
			i &= ~mask;
		}

		this.entityData.set(DATA_FLAGS_ID, (byte)(i & 0xFF));
	}

	public boolean isCharging() {
		return this.getVexFlag(1);
	}

	public void setIsCharging(boolean charging) {
		this.setVexFlag(1, charging);
	}

	public void setOwner(Mob owner) {
		this.owner = owner;
	}

	public void setLimitedLife(int limitedLifeTicks) {
		this.hasLimitedLife = true;
		this.limitedLifeTicks = limitedLifeTicks;
	}

	@Override
	protected SoundEvent getAmbientSound() {
		return SoundEvents.VEX_AMBIENT;
	}

	@Override
	protected SoundEvent getDeathSound() {
		return SoundEvents.VEX_DEATH;
	}

	@Override
	protected SoundEvent getHurtSound(DamageSource damageSource) {
		return SoundEvents.VEX_HURT;
	}

	@Override
	public float getLightLevelDependentMagicValue() {
		return 1.0F;
	}

	@Nullable
	@Override
	public SpawnGroupData finalizeSpawn(
		ServerLevelAccessor level, DifficultyInstance difficulty, EntitySpawnReason spawnReason, @Nullable SpawnGroupData spawnGroupData
	) {
		RandomSource randomSource = level.getRandom();
		this.populateDefaultEquipmentSlots(randomSource, difficulty);
		this.populateDefaultEquipmentEnchantments(level, randomSource, difficulty);
		return super.finalizeSpawn(level, difficulty, spawnReason, spawnGroupData);
	}

	@Override
	protected void populateDefaultEquipmentSlots(RandomSource random, DifficultyInstance difficulty) {
		this.setItemSlot(EquipmentSlot.MAINHAND, new ItemStack(Items.IRON_SWORD));
		this.setDropChance(EquipmentSlot.MAINHAND, 0.0F);
	}

	class VexChargeAttackGoal extends Goal {
		public VexChargeAttackGoal() {
			this.setFlags(EnumSet.of(Flag.MOVE));
		}

		@Override
		public boolean canUse() {
			LivingEntity livingEntity = Vex.this.getTarget();
			return livingEntity != null && livingEntity.isAlive() && !Vex.this.getMoveControl().hasWanted() && Vex.this.random.nextInt(reducedTickDelay(7)) == 0
				? Vex.this.distanceToSqr(livingEntity) > 4.0
				: false;
		}

		@Override
		public boolean canContinueToUse() {
			return Vex.this.getMoveControl().hasWanted() && Vex.this.isCharging() && Vex.this.getTarget() != null && Vex.this.getTarget().isAlive();
		}

		@Override
		public void start() {
			LivingEntity livingEntity = Vex.this.getTarget();
			if (livingEntity != null) {
				Vec3 vec3 = livingEntity.getEyePosition();
				Vex.this.moveControl.setWantedPosition(vec3.x, vec3.y, vec3.z, 1.0);
			}

			Vex.this.setIsCharging(true);
			Vex.this.playSound(SoundEvents.VEX_CHARGE, 1.0F, 1.0F);
		}

		@Override
		public void stop() {
			Vex.this.setIsCharging(false);
		}

		@Override
		public boolean requiresUpdateEveryTick() {
			return true;
		}

		@Override
		public void tick() {
			LivingEntity livingEntity = Vex.this.getTarget();
			if (livingEntity != null) {
				if (Vex.this.getBoundingBox().intersects(livingEntity.getBoundingBox())) {
					Vex.this.doHurtTarget(getServerLevel(Vex.this.level()), livingEntity);
					Vex.this.setIsCharging(false);
				} else {
					double d = Vex.this.distanceToSqr(livingEntity);
					if (d < 9.0) {
						Vec3 vec3 = livingEntity.getEyePosition();
						Vex.this.moveControl.setWantedPosition(vec3.x, vec3.y, vec3.z, 1.0);
					}
				}
			}
		}
	}

	class VexCopyOwnerTargetGoal extends TargetGoal {
		private final TargetingConditions copyOwnerTargeting = TargetingConditions.forNonCombat().ignoreLineOfSight().ignoreInvisibilityTesting();

		public VexCopyOwnerTargetGoal(final PathfinderMob mob) {
			super(mob, false);
		}

		@Override
		public boolean canUse() {
			return Vex.this.owner != null && Vex.this.owner.getTarget() != null && this.canAttack(Vex.this.owner.getTarget(), this.copyOwnerTargeting);
		}

		@Override
		public void start() {
			Vex.this.setTarget(Vex.this.owner.getTarget());
			super.start();
		}
	}

	class VexMoveControl extends MoveControl {
		public VexMoveControl(final Vex vex) {
			super(vex);
		}

		@Override
		public void tick() {
			if (this.operation == MoveControl.Operation.MOVE_TO) {
				Vec3 vec3 = new Vec3(this.wantedX - Vex.this.getX(), this.wantedY - Vex.this.getY(), this.wantedZ - Vex.this.getZ());
				double d = vec3.length();
				if (d < Vex.this.getBoundingBox().getSize()) {
					this.operation = MoveControl.Operation.WAIT;
					Vex.this.setDeltaMovement(Vex.this.getDeltaMovement().scale(0.5));
				} else {
					Vex.this.setDeltaMovement(Vex.this.getDeltaMovement().add(vec3.scale(this.speedModifier * 0.05 / d)));
					if (Vex.this.getTarget() == null) {
						Vec3 vec32 = Vex.this.getDeltaMovement();
						Vex.this.setYRot(-((float)Mth.atan2(vec32.x, vec32.z)) * (180.0F / (float)Math.PI));
						Vex.this.yBodyRot = Vex.this.getYRot();
					} else {
						double e = Vex.this.getTarget().getX() - Vex.this.getX();
						double f = Vex.this.getTarget().getZ() - Vex.this.getZ();
						Vex.this.setYRot(-((float)Mth.atan2(e, f)) * (180.0F / (float)Math.PI));
						Vex.this.yBodyRot = Vex.this.getYRot();
					}
				}
			}
		}
	}

	class VexRandomMoveGoal extends Goal {
		public VexRandomMoveGoal() {
			this.setFlags(EnumSet.of(Flag.MOVE));
		}

		@Override
		public boolean canUse() {
			return !Vex.this.getMoveControl().hasWanted() && Vex.this.random.nextInt(reducedTickDelay(7)) == 0;
		}

		@Override
		public boolean canContinueToUse() {
			return false;
		}

		@Override
		public void tick() {
			BlockPos blockPos = Vex.this.getBoundOrigin();
			if (blockPos == null) {
				blockPos = Vex.this.blockPosition();
			}

			for (int i = 0; i < 3; i++) {
				BlockPos blockPos2 = blockPos.offset(Vex.this.random.nextInt(15) - 7, Vex.this.random.nextInt(11) - 5, Vex.this.random.nextInt(15) - 7);
				if (Vex.this.level().isEmptyBlock(blockPos2)) {
					Vex.this.moveControl.setWantedPosition(blockPos2.getX() + 0.5, blockPos2.getY() + 0.5, blockPos2.getZ() + 0.5, 0.25);
					if (Vex.this.getTarget() == null) {
						Vex.this.getLookControl().setLookAt(blockPos2.getX() + 0.5, blockPos2.getY() + 0.5, blockPos2.getZ() + 0.5, 180.0F, 20.0F);
					}
					break;
				}
			}
		}
	}
}