package net.minecraft.world.entity.monster;

import java.util.EnumSet;
import net.minecraft.core.BlockPos;
import net.minecraft.core.Holder;
import net.minecraft.server.level.ServerLevel;
import net.minecraft.sounds.SoundEvent;
import net.minecraft.sounds.SoundEvents;
import net.minecraft.tags.BiomeTags;
import net.minecraft.tags.FluidTags;
import net.minecraft.util.Mth;
import net.minecraft.util.RandomSource;
import net.minecraft.world.Difficulty;
import net.minecraft.world.DifficultyInstance;
import net.minecraft.world.InteractionHand;
import net.minecraft.world.damagesource.DamageSource;
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.MoverType;
import net.minecraft.world.entity.PathfinderMob;
import net.minecraft.world.entity.SpawnGroupData;
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.Goal;
import net.minecraft.world.entity.ai.goal.MoveToBlockGoal;
import net.minecraft.world.entity.ai.goal.RandomStrollGoal;
import net.minecraft.world.entity.ai.goal.RangedAttackGoal;
import net.minecraft.world.entity.ai.goal.ZombieAttackGoal;
import net.minecraft.world.entity.ai.goal.target.HurtByTargetGoal;
import net.minecraft.world.entity.ai.goal.target.NearestAttackableTargetGoal;
import net.minecraft.world.entity.ai.navigation.GroundPathNavigation;
import net.minecraft.world.entity.ai.navigation.WaterBoundPathNavigation;
import net.minecraft.world.entity.ai.util.DefaultRandomPos;
import net.minecraft.world.entity.animal.IronGolem;
import net.minecraft.world.entity.animal.Turtle;
import net.minecraft.world.entity.animal.axolotl.Axolotl;
import net.minecraft.world.entity.npc.AbstractVillager;
import net.minecraft.world.entity.player.Player;
import net.minecraft.world.entity.projectile.Projectile;
import net.minecraft.world.entity.projectile.ThrownTrident;
import net.minecraft.world.item.ItemStack;
import net.minecraft.world.item.Items;
import net.minecraft.world.level.Level;
import net.minecraft.world.level.LevelAccessor;
import net.minecraft.world.level.LevelReader;
import net.minecraft.world.level.ServerLevelAccessor;
import net.minecraft.world.level.biome.Biome;
import net.minecraft.world.level.block.Blocks;
import net.minecraft.world.level.pathfinder.Path;
import net.minecraft.world.level.pathfinder.PathType;
import net.minecraft.world.phys.Vec3;
import org.jetbrains.annotations.Nullable;

public class Drowned extends Zombie implements RangedAttackMob {
	public static final float NAUTILUS_SHELL_CHANCE = 0.03F;
	boolean searchingForLand;
	protected final WaterBoundPathNavigation waterNavigation;
	protected final GroundPathNavigation groundNavigation;

	public Drowned(EntityType<? extends Drowned> entityType, Level level) {
		super(entityType, level);
		this.moveControl = new Drowned.DrownedMoveControl(this);
		this.setPathfindingMalus(PathType.WATER, 0.0F);
		this.waterNavigation = new WaterBoundPathNavigation(this, level);
		this.groundNavigation = new GroundPathNavigation(this, level);
	}

	public static Builder createAttributes() {
		return Zombie.createAttributes().add(Attributes.STEP_HEIGHT, 1.0);
	}

	@Override
	protected void addBehaviourGoals() {
		this.goalSelector.addGoal(1, new Drowned.DrownedGoToWaterGoal(this, 1.0));
		this.goalSelector.addGoal(2, new Drowned.DrownedTridentAttackGoal(this, 1.0, 40, 10.0F));
		this.goalSelector.addGoal(2, new Drowned.DrownedAttackGoal(this, 1.0, false));
		this.goalSelector.addGoal(5, new Drowned.DrownedGoToBeachGoal(this, 1.0));
		this.goalSelector.addGoal(6, new Drowned.DrownedSwimUpGoal(this, 1.0, this.level().getSeaLevel()));
		this.goalSelector.addGoal(7, new RandomStrollGoal(this, 1.0));
		this.targetSelector.addGoal(1, new HurtByTargetGoal(this, Drowned.class).setAlertOthers(ZombifiedPiglin.class));
		this.targetSelector
			.addGoal(2, new NearestAttackableTargetGoal(this, Player.class, 10, true, false, (livingEntity, serverLevel) -> this.okTarget(livingEntity)));
		this.targetSelector.addGoal(3, new NearestAttackableTargetGoal(this, AbstractVillager.class, false));
		this.targetSelector.addGoal(3, new NearestAttackableTargetGoal(this, IronGolem.class, true));
		this.targetSelector.addGoal(3, new NearestAttackableTargetGoal(this, Axolotl.class, true, false));
		this.targetSelector.addGoal(5, new NearestAttackableTargetGoal(this, Turtle.class, 10, true, false, Turtle.BABY_ON_LAND_SELECTOR));
	}

	@Override
	public SpawnGroupData finalizeSpawn(
		ServerLevelAccessor serverLevelAccessor, DifficultyInstance difficultyInstance, EntitySpawnReason entitySpawnReason, @Nullable SpawnGroupData spawnGroupData
	) {
		spawnGroupData = super.finalizeSpawn(serverLevelAccessor, difficultyInstance, entitySpawnReason, spawnGroupData);
		if (this.getItemBySlot(EquipmentSlot.OFFHAND).isEmpty() && serverLevelAccessor.getRandom().nextFloat() < 0.03F) {
			this.setItemSlot(EquipmentSlot.OFFHAND, new ItemStack(Items.NAUTILUS_SHELL));
			this.setGuaranteedDrop(EquipmentSlot.OFFHAND);
		}

		return spawnGroupData;
	}

	public static boolean checkDrownedSpawnRules(
		EntityType<Drowned> entityType, ServerLevelAccessor serverLevelAccessor, EntitySpawnReason entitySpawnReason, BlockPos blockPos, RandomSource randomSource
	) {
		if (!serverLevelAccessor.getFluidState(blockPos.below()).is(FluidTags.WATER) && !EntitySpawnReason.isSpawner(entitySpawnReason)) {
			return false;
		} else {
			Holder<Biome> holder = serverLevelAccessor.getBiome(blockPos);
			boolean bl = serverLevelAccessor.getDifficulty() != Difficulty.PEACEFUL
				&& (EntitySpawnReason.ignoresLightRequirements(entitySpawnReason) || isDarkEnoughToSpawn(serverLevelAccessor, blockPos, randomSource))
				&& (EntitySpawnReason.isSpawner(entitySpawnReason) || serverLevelAccessor.getFluidState(blockPos).is(FluidTags.WATER));
			if (!bl || !EntitySpawnReason.isSpawner(entitySpawnReason) && entitySpawnReason != EntitySpawnReason.REINFORCEMENT) {
				return holder.is(BiomeTags.MORE_FREQUENT_DROWNED_SPAWNS)
					? randomSource.nextInt(15) == 0 && bl
					: randomSource.nextInt(40) == 0 && isDeepEnoughToSpawn(serverLevelAccessor, blockPos) && bl;
			} else {
				return true;
			}
		}
	}

	private static boolean isDeepEnoughToSpawn(LevelAccessor level, BlockPos pos) {
		return pos.getY() < level.getSeaLevel() - 5;
	}

	@Override
	protected SoundEvent getAmbientSound() {
		return this.isInWater() ? SoundEvents.DROWNED_AMBIENT_WATER : SoundEvents.DROWNED_AMBIENT;
	}

	@Override
	protected SoundEvent getHurtSound(DamageSource damageSource) {
		return this.isInWater() ? SoundEvents.DROWNED_HURT_WATER : SoundEvents.DROWNED_HURT;
	}

	@Override
	protected SoundEvent getDeathSound() {
		return this.isInWater() ? SoundEvents.DROWNED_DEATH_WATER : SoundEvents.DROWNED_DEATH;
	}

	@Override
	protected SoundEvent getStepSound() {
		return SoundEvents.DROWNED_STEP;
	}

	@Override
	protected SoundEvent getSwimSound() {
		return SoundEvents.DROWNED_SWIM;
	}

	@Override
	protected boolean canSpawnInLiquids() {
		return true;
	}

	@Override
	protected ItemStack getSkull() {
		return ItemStack.EMPTY;
	}

	@Override
	protected void populateDefaultEquipmentSlots(RandomSource random, DifficultyInstance difficulty) {
		if (random.nextFloat() > 0.9) {
			int i = random.nextInt(16);
			if (i < 10) {
				this.setItemSlot(EquipmentSlot.MAINHAND, new ItemStack(Items.TRIDENT));
			} else {
				this.setItemSlot(EquipmentSlot.MAINHAND, new ItemStack(Items.FISHING_ROD));
			}
		}
	}

	@Override
	protected boolean canReplaceCurrentItem(ItemStack itemStack, ItemStack itemStack2, EquipmentSlot equipmentSlot) {
		if (itemStack2.is(Items.NAUTILUS_SHELL)) {
			return false;
		} else if (itemStack2.is(Items.TRIDENT)) {
			return itemStack.is(Items.TRIDENT) ? itemStack.getDamageValue() < itemStack2.getDamageValue() : false;
		} else {
			return itemStack.is(Items.TRIDENT) ? true : super.canReplaceCurrentItem(itemStack, itemStack2, equipmentSlot);
		}
	}

	@Override
	protected boolean convertsInWater() {
		return false;
	}

	@Override
	public boolean checkSpawnObstruction(LevelReader level) {
		return level.isUnobstructed(this);
	}

	public boolean okTarget(@Nullable LivingEntity target) {
		return target != null ? !this.level().isDay() || target.isInWater() : false;
	}

	@Override
	public boolean isPushedByFluid() {
		return !this.isSwimming();
	}

	boolean wantsToSwim() {
		if (this.searchingForLand) {
			return true;
		} else {
			LivingEntity livingEntity = this.getTarget();
			return livingEntity != null && livingEntity.isInWater();
		}
	}

	@Override
	public void travel(Vec3 travelVector) {
		if (this.isControlledByLocalInstance() && this.isUnderWater() && this.wantsToSwim()) {
			this.moveRelative(0.01F, travelVector);
			this.move(MoverType.SELF, this.getDeltaMovement());
			this.setDeltaMovement(this.getDeltaMovement().scale(0.9));
		} else {
			super.travel(travelVector);
		}
	}

	@Override
	public void updateSwimming() {
		if (!this.level().isClientSide) {
			if (this.isEffectiveAi() && this.isUnderWater() && this.wantsToSwim()) {
				this.navigation = this.waterNavigation;
				this.setSwimming(true);
			} else {
				this.navigation = this.groundNavigation;
				this.setSwimming(false);
			}
		}
	}

	@Override
	public boolean isVisuallySwimming() {
		return this.isSwimming();
	}

	protected boolean closeToNextPos() {
		Path path = this.getNavigation().getPath();
		if (path != null) {
			BlockPos blockPos = path.getTarget();
			if (blockPos != null) {
				double d = this.distanceToSqr(blockPos.getX(), blockPos.getY(), blockPos.getZ());
				if (d < 4.0) {
					return true;
				}
			}
		}

		return false;
	}

	@Override
	public void performRangedAttack(LivingEntity target, float velocity) {
		ItemStack itemStack = this.getMainHandItem();
		ItemStack itemStack2 = itemStack.is(Items.TRIDENT) ? itemStack : new ItemStack(Items.TRIDENT);
		ThrownTrident thrownTrident = new ThrownTrident(this.level(), this, itemStack2);
		double d = target.getX() - this.getX();
		double e = target.getY(0.3333333333333333) - thrownTrident.getY();
		double f = target.getZ() - this.getZ();
		double g = Math.sqrt(d * d + f * f);
		if (this.level() instanceof ServerLevel serverLevel) {
			Projectile.spawnProjectileUsingShoot(thrownTrident, serverLevel, itemStack2, d, e + g * 0.2F, f, 1.6F, 14 - this.level().getDifficulty().getId() * 4);
		}

		this.playSound(SoundEvents.DROWNED_SHOOT, 1.0F, 1.0F / (this.getRandom().nextFloat() * 0.4F + 0.8F));
	}

	public void setSearchingForLand(boolean searchingForLand) {
		this.searchingForLand = searchingForLand;
	}

	static class DrownedAttackGoal extends ZombieAttackGoal {
		private final Drowned drowned;

		public DrownedAttackGoal(Drowned drowned, double speedModifier, boolean followingTargetEvenIfNotSeen) {
			super(drowned, speedModifier, followingTargetEvenIfNotSeen);
			this.drowned = drowned;
		}

		@Override
		public boolean canUse() {
			return super.canUse() && this.drowned.okTarget(this.drowned.getTarget());
		}

		@Override
		public boolean canContinueToUse() {
			return super.canContinueToUse() && this.drowned.okTarget(this.drowned.getTarget());
		}
	}

	static class DrownedGoToBeachGoal extends MoveToBlockGoal {
		private final Drowned drowned;

		public DrownedGoToBeachGoal(Drowned drowned, double speedModifier) {
			super(drowned, speedModifier, 8, 2);
			this.drowned = drowned;
		}

		@Override
		public boolean canUse() {
			return super.canUse() && !this.drowned.level().isDay() && this.drowned.isInWater() && this.drowned.getY() >= this.drowned.level().getSeaLevel() - 3;
		}

		@Override
		public boolean canContinueToUse() {
			return super.canContinueToUse();
		}

		@Override
		protected boolean isValidTarget(LevelReader level, BlockPos pos) {
			BlockPos blockPos = pos.above();
			return level.isEmptyBlock(blockPos) && level.isEmptyBlock(blockPos.above()) ? level.getBlockState(pos).entityCanStandOn(level, pos, this.drowned) : false;
		}

		@Override
		public void start() {
			this.drowned.setSearchingForLand(false);
			this.drowned.navigation = this.drowned.groundNavigation;
			super.start();
		}

		@Override
		public void stop() {
			super.stop();
		}
	}

	static class DrownedGoToWaterGoal extends Goal {
		private final PathfinderMob mob;
		private double wantedX;
		private double wantedY;
		private double wantedZ;
		private final double speedModifier;
		private final Level level;

		public DrownedGoToWaterGoal(PathfinderMob mob, double speedModifier) {
			this.mob = mob;
			this.speedModifier = speedModifier;
			this.level = mob.level();
			this.setFlags(EnumSet.of(Goal.Flag.MOVE));
		}

		@Override
		public boolean canUse() {
			if (!this.level.isDay()) {
				return false;
			} else if (this.mob.isInWater()) {
				return false;
			} else {
				Vec3 vec3 = this.getWaterPos();
				if (vec3 == null) {
					return false;
				} else {
					this.wantedX = vec3.x;
					this.wantedY = vec3.y;
					this.wantedZ = vec3.z;
					return true;
				}
			}
		}

		@Override
		public boolean canContinueToUse() {
			return !this.mob.getNavigation().isDone();
		}

		@Override
		public void start() {
			this.mob.getNavigation().moveTo(this.wantedX, this.wantedY, this.wantedZ, this.speedModifier);
		}

		@Nullable
		private Vec3 getWaterPos() {
			RandomSource randomSource = this.mob.getRandom();
			BlockPos blockPos = this.mob.blockPosition();

			for (int i = 0; i < 10; i++) {
				BlockPos blockPos2 = blockPos.offset(randomSource.nextInt(20) - 10, 2 - randomSource.nextInt(8), randomSource.nextInt(20) - 10);
				if (this.level.getBlockState(blockPos2).is(Blocks.WATER)) {
					return Vec3.atBottomCenterOf(blockPos2);
				}
			}

			return null;
		}
	}

	static class DrownedMoveControl extends MoveControl {
		private final Drowned drowned;

		public DrownedMoveControl(Drowned drowned) {
			super(drowned);
			this.drowned = drowned;
		}

		@Override
		public void tick() {
			LivingEntity livingEntity = this.drowned.getTarget();
			if (this.drowned.wantsToSwim() && this.drowned.isInWater()) {
				if (livingEntity != null && livingEntity.getY() > this.drowned.getY() || this.drowned.searchingForLand) {
					this.drowned.setDeltaMovement(this.drowned.getDeltaMovement().add(0.0, 0.002, 0.0));
				}

				if (this.operation != MoveControl.Operation.MOVE_TO || this.drowned.getNavigation().isDone()) {
					this.drowned.setSpeed(0.0F);
					return;
				}

				double d = this.wantedX - this.drowned.getX();
				double e = this.wantedY - this.drowned.getY();
				double f = this.wantedZ - this.drowned.getZ();
				double g = Math.sqrt(d * d + e * e + f * f);
				e /= g;
				float h = (float)(Mth.atan2(f, d) * 180.0F / (float)Math.PI) - 90.0F;
				this.drowned.setYRot(this.rotlerp(this.drowned.getYRot(), h, 90.0F));
				this.drowned.yBodyRot = this.drowned.getYRot();
				float i = (float)(this.speedModifier * this.drowned.getAttributeValue(Attributes.MOVEMENT_SPEED));
				float j = Mth.lerp(0.125F, this.drowned.getSpeed(), i);
				this.drowned.setSpeed(j);
				this.drowned.setDeltaMovement(this.drowned.getDeltaMovement().add(j * d * 0.005, j * e * 0.1, j * f * 0.005));
			} else {
				if (!this.drowned.onGround()) {
					this.drowned.setDeltaMovement(this.drowned.getDeltaMovement().add(0.0, -0.008, 0.0));
				}

				super.tick();
			}
		}
	}

	static class DrownedSwimUpGoal extends Goal {
		private final Drowned drowned;
		private final double speedModifier;
		private final int seaLevel;
		private boolean stuck;

		public DrownedSwimUpGoal(Drowned drowned, double speedModifier, int seaLevel) {
			this.drowned = drowned;
			this.speedModifier = speedModifier;
			this.seaLevel = seaLevel;
		}

		@Override
		public boolean canUse() {
			return !this.drowned.level().isDay() && this.drowned.isInWater() && this.drowned.getY() < this.seaLevel - 2;
		}

		@Override
		public boolean canContinueToUse() {
			return this.canUse() && !this.stuck;
		}

		@Override
		public void tick() {
			if (this.drowned.getY() < this.seaLevel - 1 && (this.drowned.getNavigation().isDone() || this.drowned.closeToNextPos())) {
				Vec3 vec3 = DefaultRandomPos.getPosTowards(this.drowned, 4, 8, new Vec3(this.drowned.getX(), this.seaLevel - 1, this.drowned.getZ()), (float) (Math.PI / 2));
				if (vec3 == null) {
					this.stuck = true;
					return;
				}

				this.drowned.getNavigation().moveTo(vec3.x, vec3.y, vec3.z, this.speedModifier);
			}
		}

		@Override
		public void start() {
			this.drowned.setSearchingForLand(true);
			this.stuck = false;
		}

		@Override
		public void stop() {
			this.drowned.setSearchingForLand(false);
		}
	}

	static class DrownedTridentAttackGoal extends RangedAttackGoal {
		private final Drowned drowned;

		public DrownedTridentAttackGoal(RangedAttackMob rangedAttackMob, double speedModifier, int attackInterval, float attackRadius) {
			super(rangedAttackMob, speedModifier, attackInterval, attackRadius);
			this.drowned = (Drowned)rangedAttackMob;
		}

		@Override
		public boolean canUse() {
			return super.canUse() && this.drowned.getMainHandItem().is(Items.TRIDENT);
		}

		@Override
		public void start() {
			super.start();
			this.drowned.setAggressive(true);
			this.drowned.startUsingItem(InteractionHand.MAIN_HAND);
		}

		@Override
		public void stop() {
			super.stop();
			this.drowned.stopUsingItem();
			this.drowned.setAggressive(false);
		}
	}
}