--- a/net/minecraft/world/entity/Mob.java
+++ b/net/minecraft/world/entity/Mob.java
@@ -5,6 +5,7 @@
 import com.google.common.collect.Maps;
 import java.util.Arrays;
 import java.util.HashSet;
+import java.util.Iterator;
 import java.util.List;
 import java.util.Map;
 import java.util.Objects;
@@ -85,8 +86,20 @@
 import net.minecraft.world.level.storage.loot.parameters.LootContextParamSets;
 import net.minecraft.world.level.storage.loot.parameters.LootContextParams;
 import net.minecraft.world.phys.AABB;
+import org.bukkit.craftbukkit.event.CraftEventFactory;
+import org.bukkit.craftbukkit.entity.CraftLivingEntity;
+import org.bukkit.event.entity.CreatureSpawnEvent;
+import org.bukkit.event.entity.EntityCombustByEntityEvent;
+import org.bukkit.event.entity.EntityRemoveEvent;
+import org.bukkit.event.entity.EntityTargetLivingEntityEvent;
+import org.bukkit.event.entity.EntityTargetEvent;
+import org.bukkit.event.entity.EntityTransformEvent;
+import org.bukkit.event.entity.EntityUnleashEvent;
+import org.bukkit.event.entity.EntityUnleashEvent.UnleashReason;
+// CraftBukkit end
 
 public abstract class Mob extends LivingEntity implements EquipmentUser, Leashable, Targeting {
+
     private static final EntityDataAccessor<Byte> DATA_MOB_FLAGS_ID = SynchedEntityData.defineId(Mob.class, EntityDataSerializers.BYTE);
     private static final int MOB_FLAG_NO_AI = 1;
     private static final int MOB_FLAG_LEFTHANDED = 2;
@@ -101,7 +114,7 @@
     public static final float PRESERVE_ITEM_DROP_CHANCE_THRESHOLD = 1.0F;
     public static final int PRESERVE_ITEM_DROP_CHANCE = 2;
     public static final int UPDATE_GOAL_SELECTOR_EVERY_N_TICKS = 2;
-    private static final double DEFAULT_ATTACK_REACH = Math.sqrt(2.04F) - 0.6F;
+    private static final double DEFAULT_ATTACK_REACH = Math.sqrt(2.0399999618530273D) - 0.6000000238418579D;
     protected static final ResourceLocation RANDOM_SPAWN_BONUS_ID = ResourceLocation.withDefaultNamespace("random_spawn_bonus");
     public int ambientSoundTime;
     protected int xpReward;
@@ -111,29 +124,40 @@
     private final BodyRotationControl bodyRotationControl;
     protected PathNavigation navigation;
     public GoalSelector goalSelector;
+    @Nullable public net.minecraft.world.entity.ai.goal.FloatGoal goalFloat; // Paper - Allow nerfed mobs to jump and float
     public GoalSelector targetSelector;
     @Nullable
     private LivingEntity target;
     private final Sensing sensing;
-    private final NonNullList<ItemStack> handItems = NonNullList.withSize(2, ItemStack.EMPTY);
-    public final float[] handDropChances = new float[2];
-    private final NonNullList<ItemStack> armorItems = NonNullList.withSize(4, ItemStack.EMPTY);
-    public final float[] armorDropChances = new float[4];
-    private ItemStack bodyArmorItem = ItemStack.EMPTY;
+    private final NonNullList<ItemStack> handItems;
+    public final float[] handDropChances;
+    private final NonNullList<ItemStack> armorItems;
+    public final float[] armorDropChances;
+    private ItemStack bodyArmorItem;
     protected float bodyArmorDropChance;
     private boolean canPickUpLoot;
     private boolean persistenceRequired;
-    private final Map<PathType, Float> pathfindingMalus = Maps.newEnumMap(PathType.class);
+    private final Map<PathType, Float> pathfindingMalus;
     @Nullable
     public ResourceKey<LootTable> lootTable;
     public long lootTableSeed;
     @Nullable
     private Leashable.LeashData leashData;
-    private BlockPos restrictCenter = BlockPos.ZERO;
-    private float restrictRadius = -1.0F;
+    private BlockPos restrictCenter;
+    private float restrictRadius;
+
+    public boolean aware = true; // CraftBukkit
 
     protected Mob(EntityType<? extends Mob> type, Level world) {
         super(type, world);
+        this.handItems = NonNullList.withSize(2, ItemStack.EMPTY);
+        this.handDropChances = new float[2];
+        this.armorItems = NonNullList.withSize(4, ItemStack.EMPTY);
+        this.armorDropChances = new float[4];
+        this.bodyArmorItem = ItemStack.EMPTY;
+        this.pathfindingMalus = Maps.newEnumMap(PathType.class);
+        this.restrictCenter = BlockPos.ZERO;
+        this.restrictRadius = -1.0F;
         this.goalSelector = new GoalSelector(world.getProfilerSupplier());
         this.targetSelector = new GoalSelector(world.getProfilerSupplier());
         this.lookControl = new LookControl(this);
@@ -148,13 +172,19 @@
         if (world != null && !world.isClientSide) {
             this.registerGoals();
         }
+
     }
 
-    protected void registerGoals() {
+    // CraftBukkit start
+    public void setPersistenceRequired(boolean persistenceRequired) {
+        this.persistenceRequired = persistenceRequired;
     }
+    // CraftBukkit end
+
+    protected void registerGoals() {}
 
     public static AttributeSupplier.Builder createMobAttributes() {
-        return LivingEntity.createLivingAttributes().add(Attributes.FOLLOW_RANGE, 16.0);
+        return LivingEntity.createLivingAttributes().add(Attributes.FOLLOW_RANGE, 16.0D);
     }
 
     protected PathNavigation createNavigation(Level world) {
@@ -166,29 +196,33 @@
     }
 
     public float getPathfindingMalus(PathType nodeType) {
-        Mob mob2;
-        label17: {
-            if (this.getControlledVehicle() instanceof Mob mob && mob.shouldPassengersInheritMalus()) {
-                mob2 = mob;
-                break label17;
+        Mob entityinsentient;
+        label17:
+        {
+            Entity entity = this.getControlledVehicle();
+
+            if (entity instanceof Mob entityinsentient1) {
+                if (entityinsentient1.shouldPassengersInheritMalus()) {
+                    entityinsentient = entityinsentient1;
+                    break label17;
+                }
             }
 
-            mob2 = this;
+            entityinsentient = this;
         }
 
-        Float float_ = mob2.pathfindingMalus.get(nodeType);
-        return float_ == null ? nodeType.getMalus() : float_;
+        Float ofloat = (Float) entityinsentient.pathfindingMalus.get(nodeType);
+
+        return ofloat == null ? nodeType.getMalus() : ofloat;
     }
 
     public void setPathfindingMalus(PathType nodeType, float penalty) {
         this.pathfindingMalus.put(nodeType, penalty);
     }
 
-    public void onPathfindingStart() {
-    }
+    public void onPathfindingStart() {}
 
-    public void onPathfindingDone() {
-    }
+    public void onPathfindingDone() {}
 
     protected BodyRotationControl createBodyControl() {
         return new BodyRotationControl(this);
@@ -198,8 +232,27 @@
         return this.lookControl;
     }
 
+    // Paper start
+    @Override
+    public void inactiveTick() {
+        super.inactiveTick();
+        if (this.goalSelector.inactiveTick()) {
+            this.goalSelector.tick();
+        }
+        if (this.targetSelector.inactiveTick()) {
+            this.targetSelector.tick();
+        }
+    }
+    // Paper end
+
     public MoveControl getMoveControl() {
-        return this.getControlledVehicle() instanceof Mob mob ? mob.getMoveControl() : this.moveControl;
+        Entity entity = this.getControlledVehicle();
+
+        if (entity instanceof Mob entityinsentient) {
+            return entityinsentient.getMoveControl();
+        } else {
+            return this.moveControl;
+        }
     }
 
     public JumpControl getJumpControl() {
@@ -207,18 +260,30 @@
     }
 
     public PathNavigation getNavigation() {
-        return this.getControlledVehicle() instanceof Mob mob ? mob.getNavigation() : this.navigation;
+        Entity entity = this.getControlledVehicle();
+
+        if (entity instanceof Mob entityinsentient) {
+            return entityinsentient.getNavigation();
+        } else {
+            return this.navigation;
+        }
     }
 
     @Nullable
     @Override
     public LivingEntity getControllingPassenger() {
         Entity entity = this.getFirstPassenger();
-        if (!this.isNoAi() && entity instanceof Mob mob && entity.canControlVehicle()) {
-            return mob;
+        Mob entityinsentient;
+
+        if (!this.isNoAi() && entity instanceof Mob entityinsentient1) {
+            if (entity.canControlVehicle()) {
+                entityinsentient = entityinsentient1;
+                return entityinsentient;
+            }
         }
 
-        return null;
+        entityinsentient = null;
+        return entityinsentient;
     }
 
     public Sensing getSensing() {
@@ -231,13 +296,46 @@
         return this.target;
     }
 
+    public org.bukkit.craftbukkit.entity.CraftMob getBukkitMob() { return (org.bukkit.craftbukkit.entity.CraftMob) super.getBukkitEntity(); } // Paper
+
     @Nullable
     protected final LivingEntity getTargetFromBrain() {
-        return this.getBrain().getMemory(MemoryModuleType.ATTACK_TARGET).orElse(null);
+        return (LivingEntity) this.getBrain().getMemory(MemoryModuleType.ATTACK_TARGET).orElse(null); // CraftBukkit - decompile error
     }
 
     public void setTarget(@Nullable LivingEntity target) {
-        this.target = target;
+        // CraftBukkit start - fire event
+        this.setTarget(target, EntityTargetEvent.TargetReason.UNKNOWN, true);
+    }
+
+    public boolean setTarget(LivingEntity entityliving, EntityTargetEvent.TargetReason reason, boolean fireEvent) {
+        if (this.getTarget() == entityliving) return false;
+        if (fireEvent) {
+            if (reason == EntityTargetEvent.TargetReason.UNKNOWN && this.getTarget() != null && entityliving == null) {
+                reason = this.getTarget().isAlive() ? EntityTargetEvent.TargetReason.FORGOT_TARGET : EntityTargetEvent.TargetReason.TARGET_DIED;
+            }
+            if (reason == EntityTargetEvent.TargetReason.UNKNOWN) {
+                this.level().getCraftServer().getLogger().log(java.util.logging.Level.WARNING, "Unknown target reason, please report on the issue tracker", new Exception());
+            }
+            CraftLivingEntity ctarget = null;
+            if (entityliving != null) {
+                ctarget = (CraftLivingEntity) entityliving.getBukkitEntity();
+            }
+            EntityTargetLivingEntityEvent event = new EntityTargetLivingEntityEvent(this.getBukkitEntity(), ctarget, reason);
+            this.level().getCraftServer().getPluginManager().callEvent(event);
+            if (event.isCancelled()) {
+                return false;
+            }
+
+            if (event.getTarget() != null) {
+                entityliving = ((CraftLivingEntity) event.getTarget()).getHandle();
+            } else {
+                entityliving = null;
+            }
+        }
+        this.target = entityliving;
+        return true;
+        // CraftBukkit end
     }
 
     @Override
@@ -256,7 +354,7 @@
     @Override
     protected void defineSynchedData(SynchedEntityData.Builder builder) {
         super.defineSynchedData(builder);
-        builder.define(DATA_MOB_FLAGS_ID, (byte)0);
+        builder.define(Mob.DATA_MOB_FLAGS_ID, (byte) 0);
     }
 
     public int getAmbientSoundInterval() {
@@ -294,14 +392,16 @@
         if (this.xpReward > 0) {
             int i = this.xpReward;
 
-            for (int j = 0; j < this.armorItems.size(); j++) {
-                if (!this.armorItems.get(j).isEmpty() && this.armorDropChances[j] <= 1.0F) {
+            int j;
+
+            for (j = 0; j < this.armorItems.size(); ++j) {
+                if (!((ItemStack) this.armorItems.get(j)).isEmpty() && this.armorDropChances[j] <= 1.0F) {
                     i += 1 + this.random.nextInt(3);
                 }
             }
 
-            for (int k = 0; k < this.handItems.size(); k++) {
-                if (!this.handItems.get(k).isEmpty() && this.handDropChances[k] <= 1.0F) {
+            for (j = 0; j < this.handItems.size(); ++j) {
+                if (!((ItemStack) this.handItems.get(j)).isEmpty() && this.handDropChances[j] <= 1.0F) {
                     i += 1 + this.random.nextInt(3);
                 }
             }
@@ -318,16 +418,18 @@
 
     public void spawnAnim() {
         if (this.level().isClientSide) {
-            for (int i = 0; i < 20; i++) {
-                double d = this.random.nextGaussian() * 0.02;
-                double e = this.random.nextGaussian() * 0.02;
-                double f = this.random.nextGaussian() * 0.02;
-                double g = 10.0;
-                this.level().addParticle(ParticleTypes.POOF, this.getX(1.0) - d * 10.0, this.getRandomY() - e * 10.0, this.getRandomZ(1.0) - f * 10.0, d, e, f);
+            for (int i = 0; i < 20; ++i) {
+                double d0 = this.random.nextGaussian() * 0.02D;
+                double d1 = this.random.nextGaussian() * 0.02D;
+                double d2 = this.random.nextGaussian() * 0.02D;
+                double d3 = 10.0D;
+
+                this.level().addParticle(ParticleTypes.POOF, this.getX(1.0D) - d0 * 10.0D, this.getRandomY() - d1 * 10.0D, this.getRandomZ(1.0D) - d2 * 10.0D, d0, d1, d2);
             }
         } else {
-            this.level().broadcastEntityEvent(this, (byte)20);
+            this.level().broadcastEntityEvent(this, (byte) 20);
         }
+
     }
 
     @Override
@@ -337,6 +439,7 @@
         } else {
             super.handleEntityEvent(status);
         }
+
     }
 
     @Override
@@ -345,14 +448,16 @@
         if (!this.level().isClientSide && this.tickCount % 5 == 0) {
             this.updateControlFlags();
         }
+
     }
 
     protected void updateControlFlags() {
-        boolean bl = !(this.getControllingPassenger() instanceof Mob);
-        boolean bl2 = !(this.getVehicle() instanceof Boat);
-        this.goalSelector.setControlFlag(Goal.Flag.MOVE, bl);
-        this.goalSelector.setControlFlag(Goal.Flag.JUMP, bl && bl2);
-        this.goalSelector.setControlFlag(Goal.Flag.LOOK, bl);
+        boolean flag = !(this.getControllingPassenger() instanceof Mob);
+        boolean flag1 = !(this.getVehicle() instanceof Boat);
+
+        this.goalSelector.setControlFlag(Goal.Flag.MOVE, flag);
+        this.goalSelector.setControlFlag(Goal.Flag.JUMP, flag && flag1);
+        this.goalSelector.setControlFlag(Goal.Flag.LOOK, flag);
     }
 
     @Override
@@ -366,47 +471,67 @@
         return null;
     }
 
+    // CraftBukkit start - Add delegate method
+    public SoundEvent getAmbientSound0() {
+        return this.getAmbientSound();
+    }
+    // CraftBukkit end
+
     @Override
     public void addAdditionalSaveData(CompoundTag nbt) {
         super.addAdditionalSaveData(nbt);
         nbt.putBoolean("CanPickUpLoot", this.canPickUpLoot());
         nbt.putBoolean("PersistenceRequired", this.persistenceRequired);
-        ListTag listTag = new ListTag();
+        ListTag nbttaglist = new ListTag();
+        Iterator iterator = this.armorItems.iterator();
 
-        for (ItemStack itemStack : this.armorItems) {
-            if (!itemStack.isEmpty()) {
-                listTag.add(itemStack.save(this.registryAccess()));
+        while (iterator.hasNext()) {
+            ItemStack itemstack = (ItemStack) iterator.next();
+
+            if (!itemstack.isEmpty()) {
+                nbttaglist.add(itemstack.save(this.registryAccess()));
             } else {
-                listTag.add(new CompoundTag());
+                nbttaglist.add(new CompoundTag());
             }
         }
 
-        nbt.put("ArmorItems", listTag);
-        ListTag listTag2 = new ListTag();
+        nbt.put("ArmorItems", nbttaglist);
+        ListTag nbttaglist1 = new ListTag();
+        float[] afloat = this.armorDropChances;
+        int i = afloat.length;
 
-        for (float f : this.armorDropChances) {
-            listTag2.add(FloatTag.valueOf(f));
+        for (int j = 0; j < i; ++j) {
+            float f = afloat[j];
+
+            nbttaglist1.add(FloatTag.valueOf(f));
         }
 
-        nbt.put("ArmorDropChances", listTag2);
-        ListTag listTag3 = new ListTag();
+        nbt.put("ArmorDropChances", nbttaglist1);
+        ListTag nbttaglist2 = new ListTag();
+        Iterator iterator1 = this.handItems.iterator();
 
-        for (ItemStack itemStack2 : this.handItems) {
-            if (!itemStack2.isEmpty()) {
-                listTag3.add(itemStack2.save(this.registryAccess()));
+        while (iterator1.hasNext()) {
+            ItemStack itemstack1 = (ItemStack) iterator1.next();
+
+            if (!itemstack1.isEmpty()) {
+                nbttaglist2.add(itemstack1.save(this.registryAccess()));
             } else {
-                listTag3.add(new CompoundTag());
+                nbttaglist2.add(new CompoundTag());
             }
         }
 
-        nbt.put("HandItems", listTag3);
-        ListTag listTag4 = new ListTag();
+        nbt.put("HandItems", nbttaglist2);
+        ListTag nbttaglist3 = new ListTag();
+        float[] afloat1 = this.handDropChances;
+        int k = afloat1.length;
 
-        for (float g : this.handDropChances) {
-            listTag4.add(FloatTag.valueOf(g));
+        for (int l = 0; l < k; ++l) {
+            float f1 = afloat1[l];
+
+            nbttaglist3.add(FloatTag.valueOf(f1));
         }
 
-        nbt.put("HandDropChances", listTag4);
+        nbt.put("HandDropChances", nbttaglist3);
         if (!this.bodyArmorItem.isEmpty()) {
             nbt.put("body_armor_item", this.bodyArmorItem.save(this.registryAccess()));
             nbt.putFloat("body_armor_drop_chance", this.bodyArmorDropChance);
@@ -424,52 +549,67 @@
         if (this.isNoAi()) {
             nbt.putBoolean("NoAI", this.isNoAi());
         }
+
+        nbt.putBoolean("Bukkit.Aware", this.aware); // CraftBukkit
     }
 
     @Override
     public void readAdditionalSaveData(CompoundTag nbt) {
         super.readAdditionalSaveData(nbt);
+
+        // CraftBukkit start - If looting or persistence is false only use it if it was set after we started using it
         if (nbt.contains("CanPickUpLoot", 1)) {
-            this.setCanPickUpLoot(nbt.getBoolean("CanPickUpLoot"));
+            boolean data = nbt.getBoolean("CanPickUpLoot");
+            if (isLevelAtLeast(nbt, 1) || data) {
+                this.setCanPickUpLoot(data);
+            }
         }
 
-        this.persistenceRequired = nbt.getBoolean("PersistenceRequired");
+        boolean data = nbt.getBoolean("PersistenceRequired");
+        if (isLevelAtLeast(nbt, 1) || data) {
+            this.persistenceRequired = data;
+        }
+        // CraftBukkit end
+        ListTag nbttaglist;
+        CompoundTag nbttagcompound1;
+        int i;
+
         if (nbt.contains("ArmorItems", 9)) {
-            ListTag listTag = nbt.getList("ArmorItems", 10);
+            nbttaglist = nbt.getList("ArmorItems", 10);
 
-            for (int i = 0; i < this.armorItems.size(); i++) {
-                CompoundTag compoundTag = listTag.getCompound(i);
-                this.armorItems.set(i, ItemStack.parseOptional(this.registryAccess(), compoundTag));
+            for (i = 0; i < this.armorItems.size(); ++i) {
+                nbttagcompound1 = nbttaglist.getCompound(i);
+                this.armorItems.set(i, ItemStack.parseOptional(this.registryAccess(), nbttagcompound1));
             }
         }
 
         if (nbt.contains("ArmorDropChances", 9)) {
-            ListTag listTag2 = nbt.getList("ArmorDropChances", 5);
+            nbttaglist = nbt.getList("ArmorDropChances", 5);
 
-            for (int j = 0; j < listTag2.size(); j++) {
-                this.armorDropChances[j] = listTag2.getFloat(j);
+            for (i = 0; i < nbttaglist.size(); ++i) {
+                this.armorDropChances[i] = nbttaglist.getFloat(i);
             }
         }
 
         if (nbt.contains("HandItems", 9)) {
-            ListTag listTag3 = nbt.getList("HandItems", 10);
+            nbttaglist = nbt.getList("HandItems", 10);
 
-            for (int k = 0; k < this.handItems.size(); k++) {
-                CompoundTag compoundTag2 = listTag3.getCompound(k);
-                this.handItems.set(k, ItemStack.parseOptional(this.registryAccess(), compoundTag2));
+            for (i = 0; i < this.handItems.size(); ++i) {
+                nbttagcompound1 = nbttaglist.getCompound(i);
+                this.handItems.set(i, ItemStack.parseOptional(this.registryAccess(), nbttagcompound1));
             }
         }
 
         if (nbt.contains("HandDropChances", 9)) {
-            ListTag listTag4 = nbt.getList("HandDropChances", 5);
+            nbttaglist = nbt.getList("HandDropChances", 5);
 
-            for (int l = 0; l < listTag4.size(); l++) {
-                this.handDropChances[l] = listTag4.getFloat(l);
+            for (i = 0; i < nbttaglist.size(); ++i) {
+                this.handDropChances[i] = nbttaglist.getFloat(i);
             }
         }
 
         if (nbt.contains("body_armor_item", 10)) {
-            this.bodyArmorItem = ItemStack.parse(this.registryAccess(), nbt.getCompound("body_armor_item")).orElse(ItemStack.EMPTY);
+            this.bodyArmorItem = (ItemStack) ItemStack.parse(this.registryAccess(), nbt.getCompound("body_armor_item")).orElse(ItemStack.EMPTY);
             this.bodyArmorDropChance = nbt.getFloat("body_armor_drop_chance");
         } else {
             this.bodyArmorItem = ItemStack.EMPTY;
@@ -478,11 +618,16 @@
         this.leashData = this.readLeashData(nbt);
         this.setLeftHanded(nbt.getBoolean("LeftHanded"));
         if (nbt.contains("DeathLootTable", 8)) {
-            this.lootTable = ResourceKey.create(Registries.LOOT_TABLE, ResourceLocation.parse(nbt.getString("DeathLootTable")));
+            this.lootTable = net.minecraft.Optionull.map(ResourceLocation.tryParse(nbt.getString("DeathLootTable")), rl -> ResourceKey.create(Registries.LOOT_TABLE, rl)); // Paper - Validate ResourceLocation
             this.lootTableSeed = nbt.getLong("DeathLootTableSeed");
         }
 
         this.setNoAi(nbt.getBoolean("NoAI"));
+        // CraftBukkit start
+        if (nbt.contains("Bukkit.Aware")) {
+            this.aware = nbt.getBoolean("Bukkit.Aware");
+        }
+        // CraftBukkit end
     }
 
     @Override
@@ -534,17 +679,21 @@
     public void aiStep() {
         super.aiStep();
         this.level().getProfiler().push("looting");
-        if (!this.level().isClientSide
-            && this.canPickUpLoot()
-            && this.isAlive()
-            && !this.dead
-            && this.level().getGameRules().getBoolean(GameRules.RULE_MOBGRIEFING)) {
-            Vec3i vec3i = this.getPickupReach();
+        if (!this.level().isClientSide && this.canPickUpLoot() && this.isAlive() && !this.dead && this.level().getGameRules().getBoolean(GameRules.RULE_MOBGRIEFING)) {
+            Vec3i baseblockposition = this.getPickupReach();
+            List<ItemEntity> list = this.level().getEntitiesOfClass(ItemEntity.class, this.getBoundingBox().inflate((double) baseblockposition.getX(), (double) baseblockposition.getY(), (double) baseblockposition.getZ()));
+            Iterator iterator = list.iterator();
 
-            for (ItemEntity itemEntity : this.level()
-                .getEntitiesOfClass(ItemEntity.class, this.getBoundingBox().inflate((double)vec3i.getX(), (double)vec3i.getY(), (double)vec3i.getZ()))) {
-                if (!itemEntity.isRemoved() && !itemEntity.getItem().isEmpty() && !itemEntity.hasPickUpDelay() && this.wantsToPickUp(itemEntity.getItem())) {
-                    this.pickUpItem(itemEntity);
+            while (iterator.hasNext()) {
+                ItemEntity entityitem = (ItemEntity) iterator.next();
+
+                if (!entityitem.isRemoved() && !entityitem.getItem().isEmpty() && !entityitem.hasPickUpDelay() && this.wantsToPickUp(entityitem.getItem())) {
+                    // Paper start - Item#canEntityPickup
+                    if (!entityitem.canMobPickup) {
+                        continue;
+                    }
+                    // Paper end - Item#canEntityPickup
+                    this.pickUpItem(entityitem);
                 }
             }
         }
@@ -553,41 +702,60 @@
     }
 
     protected Vec3i getPickupReach() {
-        return ITEM_PICKUP_REACH;
+        return Mob.ITEM_PICKUP_REACH;
     }
 
     protected void pickUpItem(ItemEntity item) {
-        ItemStack itemStack = item.getItem();
-        ItemStack itemStack2 = this.equipItemIfPossible(itemStack.copy());
-        if (!itemStack2.isEmpty()) {
+        ItemStack itemstack = item.getItem();
+        ItemStack itemstack1 = this.equipItemIfPossible(itemstack.copy(), item); // CraftBukkit - add item
+
+        if (!itemstack1.isEmpty()) {
             this.onItemPickup(item);
-            this.take(item, itemStack2.getCount());
-            itemStack.shrink(itemStack2.getCount());
-            if (itemStack.isEmpty()) {
-                item.discard();
+            this.take(item, itemstack1.getCount());
+            itemstack.shrink(itemstack1.getCount());
+            if (itemstack.isEmpty()) {
+                item.discard(EntityRemoveEvent.Cause.PICKUP); // CraftBukkit - add Bukkit remove cause
             }
         }
+
     }
 
     public ItemStack equipItemIfPossible(ItemStack stack) {
-        EquipmentSlot equipmentSlot = this.getEquipmentSlotForItem(stack);
-        ItemStack itemStack = this.getItemBySlot(equipmentSlot);
-        boolean bl = this.canReplaceCurrentItem(stack, itemStack);
-        if (equipmentSlot.isArmor() && !bl) {
-            equipmentSlot = EquipmentSlot.MAINHAND;
-            itemStack = this.getItemBySlot(equipmentSlot);
-            bl = itemStack.isEmpty();
+        // CraftBukkit start - add item
+        return this.equipItemIfPossible(stack, null);
+    }
+
+    public ItemStack equipItemIfPossible(ItemStack itemstack, ItemEntity entityitem) {
+        // CraftBukkit end
+        EquipmentSlot enumitemslot = this.getEquipmentSlotForItem(itemstack);
+        ItemStack itemstack1 = this.getItemBySlot(enumitemslot);
+        boolean flag = this.canReplaceCurrentItem(itemstack, itemstack1);
+
+        if (enumitemslot.isArmor() && !flag) {
+            enumitemslot = EquipmentSlot.MAINHAND;
+            itemstack1 = this.getItemBySlot(enumitemslot);
+            flag = itemstack1.isEmpty();
         }
 
-        if (bl && this.canHoldItem(stack)) {
-            double d = (double)this.getEquipmentDropChance(equipmentSlot);
-            if (!itemStack.isEmpty() && (double)Math.max(this.random.nextFloat() - 0.1F, 0.0F) < d) {
-                this.spawnAtLocation(itemStack);
+        // CraftBukkit start
+        boolean canPickup = flag && this.canHoldItem(itemstack);
+        if (entityitem != null) {
+            canPickup = !org.bukkit.craftbukkit.event.CraftEventFactory.callEntityPickupItemEvent(this, entityitem, 0, !canPickup).isCancelled();
+        }
+        if (canPickup) {
+            // CraftBukkit end
+            double d0 = (double) this.getEquipmentDropChance(enumitemslot);
+
+            if (!itemstack1.isEmpty() && (double) Math.max(this.random.nextFloat() - 0.1F, 0.0F) < d0) {
+                this.forceDrops = true; // CraftBukkit
+                this.spawnAtLocation(itemstack1);
+                this.forceDrops = false; // CraftBukkit
             }
 
-            ItemStack itemStack2 = equipmentSlot.limit(stack);
-            this.setItemSlotAndDropWhenKilled(equipmentSlot, itemStack2);
-            return itemStack2;
+            ItemStack itemstack2 = enumitemslot.limit(itemstack);
+
+            this.setItemSlotAndDropWhenKilled(enumitemslot, itemstack2);
+            return itemstack2;
         } else {
             return ItemStack.EMPTY;
         }
@@ -610,72 +778,81 @@
             case ANIMAL_ARMOR:
                 this.bodyArmorDropChance = 2.0F;
         }
+
     }
 
     protected boolean canReplaceCurrentItem(ItemStack newStack, ItemStack oldStack) {
         if (oldStack.isEmpty()) {
             return true;
-        } else if (newStack.getItem() instanceof SwordItem) {
-            if (!(oldStack.getItem() instanceof SwordItem)) {
-                return true;
-            } else {
-                double d = this.getApproximateAttackDamageWithItem(newStack);
-                double e = this.getApproximateAttackDamageWithItem(oldStack);
-                return d != e ? d > e : this.canReplaceEqualItem(newStack, oldStack);
-            }
-        } else if (newStack.getItem() instanceof BowItem && oldStack.getItem() instanceof BowItem) {
-            return this.canReplaceEqualItem(newStack, oldStack);
-        } else if (newStack.getItem() instanceof CrossbowItem && oldStack.getItem() instanceof CrossbowItem) {
-            return this.canReplaceEqualItem(newStack, oldStack);
-        } else if (newStack.getItem() instanceof ArmorItem armorItem) {
-            if (EnchantmentHelper.has(oldStack, EnchantmentEffectComponents.PREVENT_ARMOR_CHANGE)) {
-                return false;
-            } else if (!(oldStack.getItem() instanceof ArmorItem)) {
-                return true;
-            } else {
-                ArmorItem armorItem2 = (ArmorItem)oldStack.getItem();
-                if (armorItem.getDefense() != armorItem2.getDefense()) {
-                    return armorItem.getDefense() > armorItem2.getDefense();
-                } else {
-                    return armorItem.getToughness() != armorItem2.getToughness()
-                        ? armorItem.getToughness() > armorItem2.getToughness()
-                        : this.canReplaceEqualItem(newStack, oldStack);
-                }
-            }
         } else {
-            if (newStack.getItem() instanceof DiggerItem) {
-                if (oldStack.getItem() instanceof BlockItem) {
+            double d0;
+            double d1;
+
+            if (newStack.getItem() instanceof SwordItem) {
+                if (!(oldStack.getItem() instanceof SwordItem)) {
                     return true;
+                } else {
+                    d0 = this.getApproximateAttackDamageWithItem(newStack);
+                    d1 = this.getApproximateAttackDamageWithItem(oldStack);
+                    return d0 != d1 ? d0 > d1 : this.canReplaceEqualItem(newStack, oldStack);
                 }
+            } else if (newStack.getItem() instanceof BowItem && oldStack.getItem() instanceof BowItem) {
+                return this.canReplaceEqualItem(newStack, oldStack);
+            } else if (newStack.getItem() instanceof CrossbowItem && oldStack.getItem() instanceof CrossbowItem) {
+                return this.canReplaceEqualItem(newStack, oldStack);
+            } else {
+                Item item = newStack.getItem();
 
-                if (oldStack.getItem() instanceof DiggerItem) {
-                    double f = this.getApproximateAttackDamageWithItem(newStack);
-                    double g = this.getApproximateAttackDamageWithItem(oldStack);
-                    if (f != g) {
-                        return f > g;
+                if (item instanceof ArmorItem) {
+                    ArmorItem itemarmor = (ArmorItem) item;
+
+                    if (EnchantmentHelper.has(oldStack, EnchantmentEffectComponents.PREVENT_ARMOR_CHANGE)) {
+                        return false;
+                    } else if (!(oldStack.getItem() instanceof ArmorItem)) {
+                        return true;
+                    } else {
+                        ArmorItem itemarmor1 = (ArmorItem) oldStack.getItem();
+
+                        return itemarmor.getDefense() != itemarmor1.getDefense() ? itemarmor.getDefense() > itemarmor1.getDefense() : (itemarmor.getToughness() != itemarmor1.getToughness() ? itemarmor.getToughness() > itemarmor1.getToughness() : this.canReplaceEqualItem(newStack, oldStack));
                     }
+                } else {
+                    if (newStack.getItem() instanceof DiggerItem) {
+                        if (oldStack.getItem() instanceof BlockItem) {
+                            return true;
+                        }
 
-                    return this.canReplaceEqualItem(newStack, oldStack);
+                        if (oldStack.getItem() instanceof DiggerItem) {
+                            d0 = this.getApproximateAttackDamageWithItem(newStack);
+                            d1 = this.getApproximateAttackDamageWithItem(oldStack);
+                            if (d0 != d1) {
+                                return d0 > d1;
+                            }
+
+                            return this.canReplaceEqualItem(newStack, oldStack);
+                        }
+                    }
+
+                    return false;
                 }
             }
-
-            return false;
         }
     }
 
     private double getApproximateAttackDamageWithItem(ItemStack stack) {
-        ItemAttributeModifiers itemAttributeModifiers = stack.getOrDefault(DataComponents.ATTRIBUTE_MODIFIERS, ItemAttributeModifiers.EMPTY);
-        return itemAttributeModifiers.compute(this.getAttributeBaseValue(Attributes.ATTACK_DAMAGE), EquipmentSlot.MAINHAND);
+        ItemAttributeModifiers itemattributemodifiers = (ItemAttributeModifiers) stack.getOrDefault(DataComponents.ATTRIBUTE_MODIFIERS, ItemAttributeModifiers.EMPTY);
+
+        return itemattributemodifiers.compute(this.getAttributeBaseValue(Attributes.ATTACK_DAMAGE), EquipmentSlot.MAINHAND);
     }
 
     public boolean canReplaceEqualItem(ItemStack newStack, ItemStack oldStack) {
-        return newStack.getDamageValue() < oldStack.getDamageValue() || hasAnyComponentExceptDamage(newStack) && !hasAnyComponentExceptDamage(oldStack);
+        return newStack.getDamageValue() < oldStack.getDamageValue() ? true : Mob.hasAnyComponentExceptDamage(newStack) && !Mob.hasAnyComponentExceptDamage(oldStack);
     }
 
     private static boolean hasAnyComponentExceptDamage(ItemStack stack) {
-        DataComponentMap dataComponentMap = stack.getComponents();
-        int i = dataComponentMap.size();
-        return i > 1 || i == 1 && !dataComponentMap.has(DataComponents.DAMAGE);
+        DataComponentMap datacomponentmap = stack.getComponents();
+        int i = datacomponentmap.size();
+
+        return i > 1 || i == 1 && !datacomponentmap.has(DataComponents.DAMAGE);
     }
 
     public boolean canHoldItem(ItemStack stack) {
@@ -701,25 +878,29 @@
     @Override
     public void checkDespawn() {
         if (this.level().getDifficulty() == Difficulty.PEACEFUL && this.shouldDespawnInPeaceful()) {
-            this.discard();
+            this.discard(EntityRemoveEvent.Cause.DESPAWN); // CraftBukkit - add Bukkit remove cause
         } else if (!this.isPersistenceRequired() && !this.requiresCustomPersistence()) {
-            Entity entity = this.level().getNearestPlayer(this, -1.0);
-            if (entity != null) {
-                double d = entity.distanceToSqr(this);
-                int i = this.getType().getCategory().getDespawnDistance();
+            Player entityhuman = this.level().findNearbyPlayer(this, -1.0D, EntitySelector.PLAYER_AFFECTS_SPAWNING); // Paper - Affects Spawning API
+
+            if (entityhuman != null) {
+                double d0 = entityhuman.distanceToSqr((Entity) this);
+                int i = this.level().paperConfig().entities.spawning.despawnRanges.get(this.getType().getCategory()).hard(); // Paper - Configurable despawn distances
                 int j = i * i;
-                if (d > (double)j && this.removeWhenFarAway(d)) {
-                    this.discard();
+
+                if (d0 > (double) j && this.removeWhenFarAway(d0)) {
+                    this.discard(EntityRemoveEvent.Cause.DESPAWN); // CraftBukkit - add Bukkit remove cause
                 }
 
-                int k = this.getType().getCategory().getNoDespawnDistance();
+                int k = this.level().paperConfig().entities.spawning.despawnRanges.get(this.getType().getCategory()).soft(); // Paper - Configurable despawn distances
                 int l = k * k;
-                if (this.noActionTime > 600 && this.random.nextInt(800) == 0 && d > (double)l && this.removeWhenFarAway(d)) {
-                    this.discard();
-                } else if (d < (double)l) {
+
+                if (this.noActionTime > 600 && this.random.nextInt(800) == 0 && d0 > (double) l && this.removeWhenFarAway(d0)) {
+                    this.discard(EntityRemoveEvent.Cause.DESPAWN); // CraftBukkit - add Bukkit remove cause
+                } else if (d0 < (double) l) {
                     this.noActionTime = 0;
                 }
             }
+
         } else {
             this.noActionTime = 0;
         }
@@ -727,43 +908,54 @@
 
     @Override
     protected final void serverAiStep() {
-        this.noActionTime++;
-        ProfilerFiller profilerFiller = this.level().getProfiler();
-        profilerFiller.push("sensing");
+        ++this.noActionTime;
+        // Paper start - Allow nerfed mobs to jump and float
+        if (!this.aware) {
+            if (goalFloat != null) {
+                if (goalFloat.canUse()) goalFloat.tick();
+                this.getJumpControl().tick();
+            }
+            return;
+        }
+        // Paper end - Allow nerfed mobs to jump and float
+        ProfilerFiller gameprofilerfiller = this.level().getProfiler();
+
+        gameprofilerfiller.push("sensing");
         this.sensing.tick();
-        profilerFiller.pop();
+        gameprofilerfiller.pop();
         int i = this.tickCount + this.getId();
+
         if (i % 2 != 0 && this.tickCount > 1) {
-            profilerFiller.push("targetSelector");
+            gameprofilerfiller.push("targetSelector");
             this.targetSelector.tickRunningGoals(false);
-            profilerFiller.pop();
-            profilerFiller.push("goalSelector");
+            gameprofilerfiller.pop();
+            gameprofilerfiller.push("goalSelector");
             this.goalSelector.tickRunningGoals(false);
-            profilerFiller.pop();
+            gameprofilerfiller.pop();
         } else {
-            profilerFiller.push("targetSelector");
+            gameprofilerfiller.push("targetSelector");
             this.targetSelector.tick();
-            profilerFiller.pop();
-            profilerFiller.push("goalSelector");
+            gameprofilerfiller.pop();
+            gameprofilerfiller.push("goalSelector");
             this.goalSelector.tick();
-            profilerFiller.pop();
+            gameprofilerfiller.pop();
         }
 
-        profilerFiller.push("navigation");
+        gameprofilerfiller.push("navigation");
         this.navigation.tick();
-        profilerFiller.pop();
-        profilerFiller.push("mob tick");
+        gameprofilerfiller.pop();
+        gameprofilerfiller.push("mob tick");
         this.customServerAiStep();
-        profilerFiller.pop();
-        profilerFiller.push("controls");
-        profilerFiller.push("move");
+        gameprofilerfiller.pop();
+        gameprofilerfiller.push("controls");
+        gameprofilerfiller.push("move");
         this.moveControl.tick();
-        profilerFiller.popPush("look");
+        gameprofilerfiller.popPush("look");
         this.lookControl.tick();
-        profilerFiller.popPush("jump");
+        gameprofilerfiller.popPush("jump");
         this.jumpControl.tick();
-        profilerFiller.pop();
-        profilerFiller.pop();
+        gameprofilerfiller.pop();
+        gameprofilerfiller.pop();
         this.sendDebugPackets();
     }
 
@@ -771,8 +963,7 @@
         DebugPackets.sendGoalSelector(this.level(), this, this.goalSelector);
     }
 
-    protected void customServerAiStep() {
-    }
+    protected void customServerAiStep() {}
 
     public int getMaxHeadXRot() {
         return 40;
@@ -783,12 +974,13 @@
     }
 
     protected void clampHeadRotationToBody() {
-        float f = (float)this.getMaxHeadYRot();
-        float g = this.getYHeadRot();
-        float h = Mth.wrapDegrees(this.yBodyRot - g);
-        float i = Mth.clamp(Mth.wrapDegrees(this.yBodyRot - g), -f, f);
-        float j = g + h - i;
-        this.setYHeadRot(j);
+        float f = (float) this.getMaxHeadYRot();
+        float f1 = this.getYHeadRot();
+        float f2 = Mth.wrapDegrees(this.yBodyRot - f1);
+        float f3 = Mth.clamp(Mth.wrapDegrees(this.yBodyRot - f1), -f, f);
+        float f4 = f1 + f2 - f3;
+
+        this.setYHeadRot(f4);
     }
 
     public int getHeadRotSpeed() {
@@ -796,38 +988,42 @@
     }
 
     public void lookAt(Entity targetEntity, float maxYawChange, float maxPitchChange) {
-        double d = targetEntity.getX() - this.getX();
-        double e = targetEntity.getZ() - this.getZ();
-        double f;
-        if (targetEntity instanceof LivingEntity livingEntity) {
-            f = livingEntity.getEyeY() - this.getEyeY();
+        double d0 = targetEntity.getX() - this.getX();
+        double d1 = targetEntity.getZ() - this.getZ();
+        double d2;
+
+        if (targetEntity instanceof LivingEntity entityliving) {
+            d2 = entityliving.getEyeY() - this.getEyeY();
         } else {
-            f = (targetEntity.getBoundingBox().minY + targetEntity.getBoundingBox().maxY) / 2.0 - this.getEyeY();
+            d2 = (targetEntity.getBoundingBox().minY + targetEntity.getBoundingBox().maxY) / 2.0D - this.getEyeY();
         }
 
-        double h = Math.sqrt(d * d + e * e);
-        float i = (float)(Mth.atan2(e, d) * 180.0F / (float)Math.PI) - 90.0F;
-        float j = (float)(-(Mth.atan2(f, h) * 180.0F / (float)Math.PI));
-        this.setXRot(this.rotlerp(this.getXRot(), j, maxPitchChange));
-        this.setYRot(this.rotlerp(this.getYRot(), i, maxYawChange));
+        double d3 = Math.sqrt(d0 * d0 + d1 * d1);
+        float f2 = (float) (Mth.atan2(d1, d0) * 57.2957763671875D) - 90.0F;
+        float f3 = (float) (-(Mth.atan2(d2, d3) * 57.2957763671875D));
+
+        this.setXRot(this.rotlerp(this.getXRot(), f3, maxPitchChange));
+        this.setYRot(this.rotlerp(this.getYRot(), f2, maxYawChange));
     }
 
     private float rotlerp(float from, float to, float max) {
-        float f = Mth.wrapDegrees(to - from);
-        if (f > max) {
-            f = max;
+        float f3 = Mth.wrapDegrees(to - from);
+
+        if (f3 > max) {
+            f3 = max;
         }
 
-        if (f < -max) {
-            f = -max;
+        if (f3 < -max) {
+            f3 = -max;
         }
 
-        return from + f;
+        return from + f3;
     }
 
     public static boolean checkMobSpawnRules(EntityType<? extends Mob> type, LevelAccessor world, MobSpawnType spawnReason, BlockPos pos, RandomSource random) {
-        BlockPos blockPos = pos.below();
-        return spawnReason == MobSpawnType.SPAWNER || world.getBlockState(blockPos).isValidSpawn(world, blockPos, type);
+        BlockPos blockposition1 = pos.below();
+
+        return spawnReason == MobSpawnType.SPAWNER || world.getBlockState(blockposition1).isValidSpawn(world, blockposition1, type);
     }
 
     public boolean checkSpawnRules(LevelAccessor world, MobSpawnType spawnReason) {
@@ -851,13 +1047,14 @@
         if (this.getTarget() == null) {
             return this.getComfortableFallDistance(0.0F);
         } else {
-            int i = (int)(this.getHealth() - this.getMaxHealth() * 0.33F);
+            int i = (int) (this.getHealth() - this.getMaxHealth() * 0.33F);
+
             i -= (3 - this.level().getDifficulty().getId()) * 4;
             if (i < 0) {
                 i = 0;
             }
 
-            return this.getComfortableFallDistance((float)i);
+            return this.getComfortableFallDistance((float) i);
         }
     }
 
@@ -894,94 +1091,152 @@
 
     @Override
     public Iterable<ItemStack> getArmorAndBodyArmorSlots() {
-        return (Iterable<ItemStack>)(this.bodyArmorItem.isEmpty() ? this.armorItems : Iterables.concat(this.armorItems, List.of(this.bodyArmorItem)));
+        return (Iterable) (this.bodyArmorItem.isEmpty() ? this.armorItems : Iterables.concat(this.armorItems, List.of(this.bodyArmorItem)));
     }
 
     @Override
     public ItemStack getItemBySlot(EquipmentSlot slot) {
-        return switch (slot.getType()) {
-            case HAND -> (ItemStack)this.handItems.get(slot.getIndex());
-            case HUMANOID_ARMOR -> (ItemStack)this.armorItems.get(slot.getIndex());
-            case ANIMAL_ARMOR -> this.bodyArmorItem;
-        };
+        ItemStack itemstack;
+
+        switch (slot.getType()) {
+            case HAND:
+                itemstack = (ItemStack) this.handItems.get(slot.getIndex());
+                break;
+            case HUMANOID_ARMOR:
+                itemstack = (ItemStack) this.armorItems.get(slot.getIndex());
+                break;
+            case ANIMAL_ARMOR:
+                itemstack = this.bodyArmorItem;
+                break;
+            default:
+                throw new MatchException((String) null, (Throwable) null);
+        }
+
+        return itemstack;
     }
 
     @Override
     public void setItemSlot(EquipmentSlot slot, ItemStack stack) {
+        // Paper start - Fix silent equipment change
+        setItemSlot(slot, stack, false);
+    }
+
+    @Override
+    public void setItemSlot(EquipmentSlot slot, ItemStack stack, boolean silent) {
+        // Paper end - Fix silent equipment change
         this.verifyEquippedItem(stack);
         switch (slot.getType()) {
             case HAND:
-                this.onEquipItem(slot, this.handItems.set(slot.getIndex(), stack), stack);
+                this.onEquipItem(slot, (ItemStack) this.handItems.set(slot.getIndex(), stack), stack, silent); // Paper - Fix silent equipment change
                 break;
             case HUMANOID_ARMOR:
-                this.onEquipItem(slot, this.armorItems.set(slot.getIndex(), stack), stack);
+                this.onEquipItem(slot, (ItemStack) this.armorItems.set(slot.getIndex(), stack), stack, silent); // Paper - Fix silent equipment change
                 break;
             case ANIMAL_ARMOR:
-                ItemStack itemStack = this.bodyArmorItem;
+                ItemStack itemstack1 = this.bodyArmorItem;
+
                 this.bodyArmorItem = stack;
-                this.onEquipItem(slot, itemStack, stack);
+                this.onEquipItem(slot, itemstack1, stack, silent); // Paper - Fix silent equipment change
         }
+
     }
 
+    // Paper start
+    protected boolean shouldSkipLoot(EquipmentSlot slot) { // method to avoid to fallback into the global mob loot logic (i.e fox)
+        return false;
+    }
+    // Paper end
+
     @Override
     protected void dropCustomDeathLoot(ServerLevel world, DamageSource source, boolean causedByPlayer) {
         super.dropCustomDeathLoot(world, source, causedByPlayer);
+        EquipmentSlot[] aenumitemslot = EquipmentSlot.values();
+        int i = aenumitemslot.length;
+
+        for (int j = 0; j < i; ++j) {
+            EquipmentSlot enumitemslot = aenumitemslot[j];
+            if (this.shouldSkipLoot(enumitemslot)) continue; // Paper
+            ItemStack itemstack = this.getItemBySlot(enumitemslot);
+            float f = this.getEquipmentDropChance(enumitemslot);
 
-        for (EquipmentSlot equipmentSlot : EquipmentSlot.values()) {
-            ItemStack itemStack = this.getItemBySlot(equipmentSlot);
-            float f = this.getEquipmentDropChance(equipmentSlot);
             if (f != 0.0F) {
-                boolean bl = f > 1.0F;
-                Entity var13 = source.getEntity();
-                if (var13 instanceof LivingEntity) {
-                    LivingEntity livingEntity = (LivingEntity)var13;
-                    if (this.level() instanceof ServerLevel serverLevel) {
-                        f = EnchantmentHelper.processEquipmentDropChance(serverLevel, livingEntity, source, f);
+                boolean flag1 = f > 1.0F;
+                Entity entity = source.getEntity();
+
+                if (entity instanceof LivingEntity) {
+                    LivingEntity entityliving = (LivingEntity) entity;
+                    Level world1 = this.level();
+
+                    if (world1 instanceof ServerLevel) {
+                        ServerLevel worldserver1 = (ServerLevel) world1;
+
+                        f = EnchantmentHelper.processEquipmentDropChance(worldserver1, entityliving, source, f);
                     }
                 }
 
-                if (!itemStack.isEmpty()
-                    && !EnchantmentHelper.has(itemStack, EnchantmentEffectComponents.PREVENT_EQUIPMENT_DROP)
-                    && (causedByPlayer || bl)
-                    && this.random.nextFloat() < f) {
-                    if (!bl && itemStack.isDamageableItem()) {
-                        itemStack.setDamageValue(
-                            itemStack.getMaxDamage() - this.random.nextInt(1 + this.random.nextInt(Math.max(itemStack.getMaxDamage() - 3, 1)))
-                        );
+                if (!itemstack.isEmpty() && !EnchantmentHelper.has(itemstack, EnchantmentEffectComponents.PREVENT_EQUIPMENT_DROP) && (causedByPlayer || flag1) && this.random.nextFloat() < f) {
+                    if (!flag1 && itemstack.isDamageableItem()) {
+                        itemstack.setDamageValue(itemstack.getMaxDamage() - this.random.nextInt(1 + this.random.nextInt(Math.max(itemstack.getMaxDamage() - 3, 1))));
                     }
 
-                    this.spawnAtLocation(itemStack);
-                    this.setItemSlot(equipmentSlot, ItemStack.EMPTY);
+                    this.spawnAtLocation(itemstack);
+                    if (this.clearEquipmentSlots) { // Paper
+                    this.setItemSlot(enumitemslot, ItemStack.EMPTY);
+                    // Paper start
+                    } else {
+                        this.clearedEquipmentSlots.add(enumitemslot);
+                    }
+                    // Paper end
                 }
             }
         }
+
     }
 
     public float getEquipmentDropChance(EquipmentSlot slot) {
-        return switch (slot.getType()) {
-            case HAND -> this.handDropChances[slot.getIndex()];
-            case HUMANOID_ARMOR -> this.armorDropChances[slot.getIndex()];
-            case ANIMAL_ARMOR -> this.bodyArmorDropChance;
-        };
+        float f;
+
+        switch (slot.getType()) {
+            case HAND:
+                f = this.handDropChances[slot.getIndex()];
+                break;
+            case HUMANOID_ARMOR:
+                f = this.armorDropChances[slot.getIndex()];
+                break;
+            case ANIMAL_ARMOR:
+                f = this.bodyArmorDropChance;
+                break;
+            default:
+                throw new MatchException((String) null, (Throwable) null);
+        }
+
+        return f;
     }
 
     public void dropPreservedEquipment() {
-        this.dropPreservedEquipment(stack -> true);
+        this.dropPreservedEquipment((itemstack) -> {
+            return true;
+        });
     }
 
     public Set<EquipmentSlot> dropPreservedEquipment(Predicate<ItemStack> dropPredicate) {
-        Set<EquipmentSlot> set = new HashSet<>();
+        Set<EquipmentSlot> set = new HashSet();
+        EquipmentSlot[] aenumitemslot = EquipmentSlot.values();
+        int i = aenumitemslot.length;
 
-        for (EquipmentSlot equipmentSlot : EquipmentSlot.values()) {
-            ItemStack itemStack = this.getItemBySlot(equipmentSlot);
-            if (!itemStack.isEmpty()) {
-                if (!dropPredicate.test(itemStack)) {
-                    set.add(equipmentSlot);
+        for (int j = 0; j < i; ++j) {
+            EquipmentSlot enumitemslot = aenumitemslot[j];
+            ItemStack itemstack = this.getItemBySlot(enumitemslot);
+
+            if (!itemstack.isEmpty()) {
+                if (!dropPredicate.test(itemstack)) {
+                    set.add(enumitemslot);
                 } else {
-                    double d = (double)this.getEquipmentDropChance(equipmentSlot);
-                    if (d > 1.0) {
-                        this.setItemSlot(equipmentSlot, ItemStack.EMPTY);
-                        this.spawnAtLocation(itemStack);
+                    double d0 = (double) this.getEquipmentDropChance(enumitemslot);
+
+                    if (d0 > 1.0D) {
+                        this.setItemSlot(enumitemslot, ItemStack.EMPTY);
+                        this.spawnAtLocation(itemstack);
                     }
                 }
             }
@@ -991,10 +1246,7 @@
     }
 
     private LootParams createEquipmentParams(ServerLevel world) {
-        return new LootParams.Builder(world)
-            .withParameter(LootContextParams.ORIGIN, this.position())
-            .withParameter(LootContextParams.THIS_ENTITY, this)
-            .create(LootContextParamSets.EQUIPMENT);
+        return (new LootParams.Builder(world)).withParameter(LootContextParams.ORIGIN, this.position()).withParameter(LootContextParams.THIS_ENTITY, this).create(LootContextParamSets.EQUIPMENT);
     }
 
     public void equip(EquipmentTable equipmentTable) {
@@ -1002,46 +1254,57 @@
     }
 
     public void equip(ResourceKey<LootTable> lootTable, Map<EquipmentSlot, Float> slotDropChances) {
-        if (this.level() instanceof ServerLevel serverLevel) {
-            this.equip(lootTable, this.createEquipmentParams(serverLevel), slotDropChances);
+        Level world = this.level();
+
+        if (world instanceof ServerLevel worldserver) {
+            this.equip(lootTable, this.createEquipmentParams(worldserver), slotDropChances);
         }
+
     }
 
     protected void populateDefaultEquipmentSlots(RandomSource random, DifficultyInstance localDifficulty) {
         if (random.nextFloat() < 0.15F * localDifficulty.getSpecialMultiplier()) {
             int i = random.nextInt(2);
             float f = this.level().getDifficulty() == Difficulty.HARD ? 0.1F : 0.25F;
+
             if (random.nextFloat() < 0.095F) {
-                i++;
+                ++i;
             }
 
             if (random.nextFloat() < 0.095F) {
-                i++;
+                ++i;
             }
 
             if (random.nextFloat() < 0.095F) {
-                i++;
+                ++i;
             }
 
-            boolean bl = true;
+            boolean flag = true;
+            EquipmentSlot[] aenumitemslot = EquipmentSlot.values();
+            int j = aenumitemslot.length;
 
-            for (EquipmentSlot equipmentSlot : EquipmentSlot.values()) {
-                if (equipmentSlot.getType() == EquipmentSlot.Type.HUMANOID_ARMOR) {
-                    ItemStack itemStack = this.getItemBySlot(equipmentSlot);
-                    if (!bl && random.nextFloat() < f) {
+            for (int k = 0; k < j; ++k) {
+                EquipmentSlot enumitemslot = aenumitemslot[k];
+
+                if (enumitemslot.getType() == EquipmentSlot.Type.HUMANOID_ARMOR) {
+                    ItemStack itemstack = this.getItemBySlot(enumitemslot);
+
+                    if (!flag && random.nextFloat() < f) {
                         break;
                     }
 
-                    bl = false;
-                    if (itemStack.isEmpty()) {
-                        Item item = getEquipmentForSlot(equipmentSlot, i);
+                    flag = false;
+                    if (itemstack.isEmpty()) {
+                        Item item = Mob.getEquipmentForSlot(enumitemslot, i);
+
                         if (item != null) {
-                            this.setItemSlot(equipmentSlot, new ItemStack(item));
+                            this.setItemSlot(enumitemslot, new ItemStack(item));
                         }
                     }
                 }
             }
         }
+
     }
 
     @Nullable
@@ -1102,12 +1365,17 @@
 
     protected void populateDefaultEquipmentEnchantments(ServerLevelAccessor world, RandomSource random, DifficultyInstance localDifficulty) {
         this.enchantSpawnedWeapon(world, random, localDifficulty);
+        EquipmentSlot[] aenumitemslot = EquipmentSlot.values();
+        int i = aenumitemslot.length;
 
-        for (EquipmentSlot equipmentSlot : EquipmentSlot.values()) {
-            if (equipmentSlot.getType() == EquipmentSlot.Type.HUMANOID_ARMOR) {
-                this.enchantSpawnedArmor(world, random, equipmentSlot, localDifficulty);
+        for (int j = 0; j < i; ++j) {
+            EquipmentSlot enumitemslot = aenumitemslot[j];
+
+            if (enumitemslot.getType() == EquipmentSlot.Type.HUMANOID_ARMOR) {
+                this.enchantSpawnedArmor(world, random, enumitemslot, localDifficulty);
             }
         }
+
     }
 
     protected void enchantSpawnedWeapon(ServerLevelAccessor world, RandomSource random, DifficultyInstance localDifficulty) {
@@ -1119,26 +1387,25 @@
     }
 
     private void enchantSpawnedEquipment(ServerLevelAccessor world, EquipmentSlot slot, RandomSource random, float power, DifficultyInstance localDifficulty) {
-        ItemStack itemStack = this.getItemBySlot(slot);
-        if (!itemStack.isEmpty() && random.nextFloat() < power * localDifficulty.getSpecialMultiplier()) {
-            EnchantmentHelper.enchantItemFromProvider(
-                itemStack, world.registryAccess(), VanillaEnchantmentProviders.MOB_SPAWN_EQUIPMENT, localDifficulty, random
-            );
-            this.setItemSlot(slot, itemStack);
+        ItemStack itemstack = this.getItemBySlot(slot);
+
+        if (!itemstack.isEmpty() && random.nextFloat() < power * localDifficulty.getSpecialMultiplier()) {
+            EnchantmentHelper.enchantItemFromProvider(itemstack, world.registryAccess(), VanillaEnchantmentProviders.MOB_SPAWN_EQUIPMENT, localDifficulty, random);
+            this.setItemSlot(slot, itemstack);
         }
+
     }
 
     @Nullable
     public SpawnGroupData finalizeSpawn(ServerLevelAccessor world, DifficultyInstance difficulty, MobSpawnType spawnReason, @Nullable SpawnGroupData entityData) {
-        RandomSource randomSource = world.getRandom();
-        AttributeInstance attributeInstance = Objects.requireNonNull(this.getAttribute(Attributes.FOLLOW_RANGE));
-        if (!attributeInstance.hasModifier(RANDOM_SPAWN_BONUS_ID)) {
-            attributeInstance.addPermanentModifier(
-                new AttributeModifier(RANDOM_SPAWN_BONUS_ID, randomSource.triangle(0.0, 0.11485000000000001), AttributeModifier.Operation.ADD_MULTIPLIED_BASE)
-            );
+        RandomSource randomsource = world.getRandom();
+        AttributeInstance attributemodifiable = (AttributeInstance) Objects.requireNonNull(this.getAttribute(Attributes.FOLLOW_RANGE));
+
+        if (!attributemodifiable.hasModifier(Mob.RANDOM_SPAWN_BONUS_ID)) {
+            attributemodifiable.addPermanentModifier(new AttributeModifier(Mob.RANDOM_SPAWN_BONUS_ID, randomsource.triangle(0.0D, 0.11485000000000001D), AttributeModifier.Operation.ADD_MULTIPLIED_BASE));
         }
 
-        this.setLeftHanded(randomSource.nextFloat() < 0.05F);
+        this.setLeftHanded(randomsource.nextFloat() < 0.05F);
         return entityData;
     }
 
@@ -1158,6 +1425,7 @@
             case ANIMAL_ARMOR:
                 this.bodyArmorDropChance = dropChance;
         }
+
     }
 
     public boolean canPickUpLoot() {
@@ -1170,8 +1438,9 @@
 
     @Override
     public boolean canTakeItem(ItemStack stack) {
-        EquipmentSlot equipmentSlot = this.getEquipmentSlotForItem(stack);
-        return this.getItemBySlot(equipmentSlot).isEmpty() && this.canPickUpLoot();
+        EquipmentSlot enumitemslot = this.getEquipmentSlotForItem(stack);
+
+        return this.getItemBySlot(enumitemslot).isEmpty() && this.canPickUpLoot();
     }
 
     public boolean isPersistenceRequired() {
@@ -1183,19 +1452,21 @@
         if (!this.isAlive()) {
             return InteractionResult.PASS;
         } else {
-            InteractionResult interactionResult = this.checkAndHandleImportantInteractions(player, hand);
-            if (interactionResult.consumesAction()) {
+            InteractionResult enuminteractionresult = this.checkAndHandleImportantInteractions(player, hand);
+
+            if (enuminteractionresult.consumesAction()) {
                 this.gameEvent(GameEvent.ENTITY_INTERACT, player);
-                return interactionResult;
+                return enuminteractionresult;
             } else {
-                InteractionResult interactionResult2 = super.interact(player, hand);
-                if (interactionResult2 != InteractionResult.PASS) {
-                    return interactionResult2;
+                InteractionResult enuminteractionresult1 = super.interact(player, hand);
+
+                if (enuminteractionresult1 != InteractionResult.PASS) {
+                    return enuminteractionresult1;
                 } else {
-                    interactionResult = this.mobInteract(player, hand);
-                    if (interactionResult.consumesAction()) {
+                    enuminteractionresult = this.mobInteract(player, hand);
+                    if (enuminteractionresult.consumesAction()) {
                         this.gameEvent(GameEvent.ENTITY_INTERACT, player);
-                        return interactionResult;
+                        return enuminteractionresult;
                     } else {
                         return InteractionResult.PASS;
                     }
@@ -1205,21 +1476,24 @@
     }
 
     private InteractionResult checkAndHandleImportantInteractions(Player player, InteractionHand hand) {
-        ItemStack itemStack = player.getItemInHand(hand);
-        if (itemStack.is(Items.NAME_TAG)) {
-            InteractionResult interactionResult = itemStack.interactLivingEntity(player, this, hand);
-            if (interactionResult.consumesAction()) {
-                return interactionResult;
+        ItemStack itemstack = player.getItemInHand(hand);
+
+        if (itemstack.is(Items.NAME_TAG)) {
+            InteractionResult enuminteractionresult = itemstack.interactLivingEntity(player, this, hand);
+
+            if (enuminteractionresult.consumesAction()) {
+                return enuminteractionresult;
             }
         }
 
-        if (itemStack.getItem() instanceof SpawnEggItem) {
+        if (itemstack.getItem() instanceof SpawnEggItem) {
             if (this.level() instanceof ServerLevel) {
-                SpawnEggItem spawnEggItem = (SpawnEggItem)itemStack.getItem();
-                Optional<Mob> optional = spawnEggItem.spawnOffspringFromSpawnEgg(
-                    player, this, (EntityType<? extends Mob>)this.getType(), (ServerLevel)this.level(), this.position(), itemStack
-                );
-                optional.ifPresent(entity -> this.onOffspringSpawnedFromEgg(player, entity));
+                SpawnEggItem itemmonsteregg = (SpawnEggItem) itemstack.getItem();
+                Optional<Mob> optional = itemmonsteregg.spawnOffspringFromSpawnEgg(player, this, (EntityType<? extends Mob>) this.getType(), (ServerLevel) this.level(), this.position(), itemstack); // CraftBukkit - decompile error
+
+                optional.ifPresent((entityinsentient) -> {
+                    this.onOffspringSpawnedFromEgg(player, entityinsentient);
+                });
                 return optional.isPresent() ? InteractionResult.SUCCESS : InteractionResult.PASS;
             } else {
                 return InteractionResult.CONSUME;
@@ -1229,8 +1503,7 @@
         }
     }
 
-    protected void onOffspringSpawnedFromEgg(Player player, Mob child) {
-    }
+    protected void onOffspringSpawnedFromEgg(Player player, Mob child) {}
 
     protected InteractionResult mobInteract(Player player, InteractionHand hand) {
         return InteractionResult.PASS;
@@ -1241,12 +1514,12 @@
     }
 
     public boolean isWithinRestriction(BlockPos pos) {
-        return this.restrictRadius == -1.0F || this.restrictCenter.distSqr(pos) < (double)(this.restrictRadius * this.restrictRadius);
+        return this.restrictRadius == -1.0F ? true : this.restrictCenter.distSqr(pos) < (double) (this.restrictRadius * this.restrictRadius);
     }
 
     public void restrictTo(BlockPos target, int range) {
         this.restrictCenter = target;
-        this.restrictRadius = (float)range;
+        this.restrictRadius = (float) range;
     }
 
     public BlockPos getRestrictCenter() {
@@ -1265,49 +1538,67 @@
         return this.restrictRadius != -1.0F;
     }
 
+    // CraftBukkit start
     @Nullable
     public <T extends Mob> T convertTo(EntityType<T> entityType, boolean keepEquipment) {
+        return this.convertTo(entityType, keepEquipment, EntityTransformEvent.TransformReason.UNKNOWN, CreatureSpawnEvent.SpawnReason.DEFAULT);
+    }
+
+    @Nullable
+    public <T extends Mob> T convertTo(EntityType<T> entitytypes, boolean flag, EntityTransformEvent.TransformReason transformReason, CreatureSpawnEvent.SpawnReason spawnReason) {
+        // CraftBukkit end
         if (this.isRemoved()) {
             return null;
         } else {
-            T mob = (T)entityType.create(this.level());
-            if (mob == null) {
+            T t0 = entitytypes.create(this.level()); // CraftBukkit - decompile error
+
+            if (t0 == null) {
                 return null;
             } else {
-                mob.copyPosition(this);
-                mob.setBaby(this.isBaby());
-                mob.setNoAi(this.isNoAi());
+                t0.copyPosition(this);
+                t0.setBaby(this.isBaby());
+                t0.setNoAi(this.isNoAi());
                 if (this.hasCustomName()) {
-                    mob.setCustomName(this.getCustomName());
-                    mob.setCustomNameVisible(this.isCustomNameVisible());
+                    t0.setCustomName(this.getCustomName());
+                    t0.setCustomNameVisible(this.isCustomNameVisible());
                 }
 
                 if (this.isPersistenceRequired()) {
-                    mob.setPersistenceRequired();
+                    t0.setPersistenceRequired();
                 }
 
-                mob.setInvulnerable(this.isInvulnerable());
-                if (keepEquipment) {
-                    mob.setCanPickUpLoot(this.canPickUpLoot());
+                t0.setInvulnerable(this.isInvulnerable());
+                if (flag) {
+                    t0.setCanPickUpLoot(this.canPickUpLoot());
+                    EquipmentSlot[] aenumitemslot = EquipmentSlot.values();
+                    int i = aenumitemslot.length;
 
-                    for (EquipmentSlot equipmentSlot : EquipmentSlot.values()) {
-                        ItemStack itemStack = this.getItemBySlot(equipmentSlot);
-                        if (!itemStack.isEmpty()) {
-                            mob.setItemSlot(equipmentSlot, itemStack.copyAndClear());
-                            mob.setDropChance(equipmentSlot, this.getEquipmentDropChance(equipmentSlot));
+                    for (int j = 0; j < i; ++j) {
+                        EquipmentSlot enumitemslot = aenumitemslot[j];
+                        ItemStack itemstack = this.getItemBySlot(enumitemslot);
+
+                        if (!itemstack.isEmpty()) {
+                            t0.setItemSlot(enumitemslot, itemstack.copyAndClear());
+                            t0.setDropChance(enumitemslot, this.getEquipmentDropChance(enumitemslot));
                         }
                     }
                 }
 
-                this.level().addFreshEntity(mob);
+                // CraftBukkit start
+                if (CraftEventFactory.callEntityTransformEvent(this, t0, transformReason).isCancelled()) {
+                    return null;
+                }
+                this.level().addFreshEntity(t0, spawnReason);
+                // CraftBukkit end
                 if (this.isPassenger()) {
                     Entity entity = this.getVehicle();
+
                     this.stopRiding();
-                    mob.startRiding(entity, true);
+                    t0.startRiding(entity, true);
                 }
 
-                this.discard();
-                return mob;
+                this.discard(EntityRemoveEvent.Cause.TRANSFORMATION); // CraftBukkit - add Bukkit remove cause
+                return t0;
             }
         }
     }
@@ -1329,6 +1620,7 @@
         if (this.getLeashData() == null) {
             this.clearRestriction();
         }
+
     }
 
     @Override
@@ -1344,12 +1636,17 @@
 
     @Override
     public boolean startRiding(Entity entity, boolean force) {
-        boolean bl = super.startRiding(entity, force);
-        if (bl && this.isLeashed()) {
-            this.dropLeash(true, true);
+        boolean flag1 = super.startRiding(entity, force);
+
+        if (flag1 && this.isLeashed()) {
+            // Paper start - Expand EntityUnleashEvent
+            EntityUnleashEvent event = new EntityUnleashEvent(this.getBukkitEntity(), EntityUnleashEvent.UnleashReason.UNKNOWN, true);
+            if (!event.callEvent()) { return flag1; }
+            this.dropLeash(true, event.isDropLeash());
+            // Paper end - Expand EntityUnleashEvent
         }
 
-        return bl;
+        return flag1;
     }
 
     @Override
@@ -1358,34 +1655,36 @@
     }
 
     public void setNoAi(boolean aiDisabled) {
-        byte b = this.entityData.get(DATA_MOB_FLAGS_ID);
-        this.entityData.set(DATA_MOB_FLAGS_ID, aiDisabled ? (byte)(b | 1) : (byte)(b & -2));
+        byte b0 = (Byte) this.entityData.get(Mob.DATA_MOB_FLAGS_ID);
+
+        this.entityData.set(Mob.DATA_MOB_FLAGS_ID, aiDisabled ? (byte) (b0 | 1) : (byte) (b0 & -2));
     }
 
     public void setLeftHanded(boolean leftHanded) {
-        byte b = this.entityData.get(DATA_MOB_FLAGS_ID);
-        this.entityData.set(DATA_MOB_FLAGS_ID, leftHanded ? (byte)(b | 2) : (byte)(b & -3));
+        byte b0 = (Byte) this.entityData.get(Mob.DATA_MOB_FLAGS_ID);
+
+        this.entityData.set(Mob.DATA_MOB_FLAGS_ID, leftHanded ? (byte) (b0 | 2) : (byte) (b0 & -3));
     }
 
     public void setAggressive(boolean attacking) {
-        byte b = this.entityData.get(DATA_MOB_FLAGS_ID);
-        this.entityData.set(DATA_MOB_FLAGS_ID, attacking ? (byte)(b | 4) : (byte)(b & -5));
+        byte b0 = (Byte) this.entityData.get(Mob.DATA_MOB_FLAGS_ID);
+
+        this.entityData.set(Mob.DATA_MOB_FLAGS_ID, attacking ? (byte) (b0 | 4) : (byte) (b0 & -5));
     }
 
     public boolean isNoAi() {
-        return (this.entityData.get(DATA_MOB_FLAGS_ID) & 1) != 0;
+        return ((Byte) this.entityData.get(Mob.DATA_MOB_FLAGS_ID) & 1) != 0;
     }
 
     public boolean isLeftHanded() {
-        return (this.entityData.get(DATA_MOB_FLAGS_ID) & 2) != 0;
+        return ((Byte) this.entityData.get(Mob.DATA_MOB_FLAGS_ID) & 2) != 0;
     }
 
     public boolean isAggressive() {
-        return (this.entityData.get(DATA_MOB_FLAGS_ID) & 4) != 0;
+        return ((Byte) this.entityData.get(Mob.DATA_MOB_FLAGS_ID) & 4) != 0;
     }
 
-    public void setBaby(boolean baby) {
-    }
+    public void setBaby(boolean baby) {}
 
     @Override
     public HumanoidArm getMainArm() {
@@ -1398,65 +1697,66 @@
 
     protected AABB getAttackBoundingBox() {
         Entity entity = this.getVehicle();
-        AABB aABB3;
+        AABB axisalignedbb;
+
         if (entity != null) {
-            AABB aABB = entity.getBoundingBox();
-            AABB aABB2 = this.getBoundingBox();
-            aABB3 = new AABB(
-                Math.min(aABB2.minX, aABB.minX),
-                aABB2.minY,
-                Math.min(aABB2.minZ, aABB.minZ),
-                Math.max(aABB2.maxX, aABB.maxX),
-                aABB2.maxY,
-                Math.max(aABB2.maxZ, aABB.maxZ)
-            );
+            AABB axisalignedbb1 = entity.getBoundingBox();
+            AABB axisalignedbb2 = this.getBoundingBox();
+
+            axisalignedbb = new AABB(Math.min(axisalignedbb2.minX, axisalignedbb1.minX), axisalignedbb2.minY, Math.min(axisalignedbb2.minZ, axisalignedbb1.minZ), Math.max(axisalignedbb2.maxX, axisalignedbb1.maxX), axisalignedbb2.maxY, Math.max(axisalignedbb2.maxZ, axisalignedbb1.maxZ));
         } else {
-            aABB3 = this.getBoundingBox();
+            axisalignedbb = this.getBoundingBox();
         }
 
-        return aABB3.inflate(DEFAULT_ATTACK_REACH, 0.0, DEFAULT_ATTACK_REACH);
+        return axisalignedbb.inflate(Mob.DEFAULT_ATTACK_REACH, 0.0D, Mob.DEFAULT_ATTACK_REACH);
     }
 
     @Override
     public boolean doHurtTarget(Entity target) {
-        float f = (float)this.getAttributeValue(Attributes.ATTACK_DAMAGE);
-        DamageSource damageSource = this.damageSources().mobAttack(this);
-        if (this.level() instanceof ServerLevel serverLevel) {
-            f = EnchantmentHelper.modifyDamage(serverLevel, this.getWeaponItem(), target, damageSource, f);
+        float f = (float) this.getAttributeValue(Attributes.ATTACK_DAMAGE);
+        DamageSource damagesource = this.damageSources().mobAttack(this);
+        Level world = this.level();
+
+        if (world instanceof ServerLevel worldserver) {
+            f = EnchantmentHelper.modifyDamage(worldserver, this.getWeaponItem(), target, damagesource, f);
         }
 
-        boolean bl = target.hurt(damageSource, f);
-        if (bl) {
-            float g = this.getKnockback(target, damageSource);
-            if (g > 0.0F && target instanceof LivingEntity livingEntity) {
-                livingEntity.knockback(
-                    (double)(g * 0.5F),
-                    (double)Mth.sin(this.getYRot() * (float) (Math.PI / 180.0)),
-                    (double)(-Mth.cos(this.getYRot() * (float) (Math.PI / 180.0)))
-                );
-                this.setDeltaMovement(this.getDeltaMovement().multiply(0.6, 1.0, 0.6));
+        boolean flag = target.hurt(damagesource, f);
+
+        if (flag) {
+            float f1 = this.getKnockback(target, damagesource);
+
+            if (f1 > 0.0F && target instanceof LivingEntity) {
+                LivingEntity entityliving = (LivingEntity) target;
+
+                entityliving.knockback((double) (f1 * 0.5F), (double) Mth.sin(this.getYRot() * 0.017453292F), (double) (-Mth.cos(this.getYRot() * 0.017453292F)), this, io.papermc.paper.event.entity.EntityKnockbackEvent.Cause.ENTITY_ATTACK); // CraftBukkit // Paper - knockback events
+                this.setDeltaMovement(this.getDeltaMovement().multiply(0.6D, 1.0D, 0.6D));
             }
 
-            if (this.level() instanceof ServerLevel serverLevel2) {
-                EnchantmentHelper.doPostAttackEffects(serverLevel2, target, damageSource);
+            Level world1 = this.level();
+
+            if (world1 instanceof ServerLevel) {
+                ServerLevel worldserver1 = (ServerLevel) world1;
+
+                EnchantmentHelper.doPostAttackEffects(worldserver1, target, damagesource);
             }
 
             this.setLastHurtMob(target);
             this.playAttackSound();
         }
 
-        return bl;
+        return flag;
     }
 
-    protected void playAttackSound() {
-    }
+    protected void playAttackSound() {}
 
     public boolean isSunBurnTick() {
         if (this.level().isDay() && !this.level().isClientSide) {
             float f = this.getLightLevelDependentMagicValue();
-            BlockPos blockPos = BlockPos.containing(this.getX(), this.getEyeY(), this.getZ());
-            boolean bl = this.isInWaterRainOrBubble() || this.isInPowderSnow || this.wasInPowderSnow;
-            if (f > 0.5F && this.random.nextFloat() * 30.0F < (f - 0.4F) * 2.0F && !bl && this.level().canSeeSky(blockPos)) {
+            BlockPos blockposition = BlockPos.containing(this.getX(), this.getEyeY(), this.getZ());
+            boolean flag = this.isInWaterRainOrBubble() || this.isInPowderSnow || this.wasInPowderSnow;
+
+            if (f > 0.5F && this.random.nextFloat() * 30.0F < (f - 0.4F) * 2.0F && !flag && this.level().canSeeSky(blockposition)) {
                 return true;
             }
         }
@@ -1469,13 +1769,16 @@
         if (this.getNavigation().canFloat()) {
             super.jumpInLiquid(fluid);
         } else {
-            this.setDeltaMovement(this.getDeltaMovement().add(0.0, 0.3, 0.0));
+            this.setDeltaMovement(this.getDeltaMovement().add(0.0D, 0.3D, 0.0D));
         }
+
     }
 
     @VisibleForTesting
     public void removeFreeWill() {
-        this.removeAllGoals(goal -> true);
+        this.removeAllGoals((pathfindergoal) -> {
+            return true;
+        });
         this.getBrain().removeAllBehaviors();
     }
 
@@ -1486,17 +1789,19 @@
     @Override
     protected void removeAfterChangingDimensions() {
         super.removeAfterChangingDimensions();
-        this.getAllSlots().forEach(stack -> {
-            if (!stack.isEmpty()) {
-                stack.setCount(0);
+        this.getAllSlots().forEach((itemstack) -> {
+            if (!itemstack.isEmpty()) {
+                itemstack.setCount(0);
             }
+
         });
     }
 
     @Nullable
     @Override
     public ItemStack getPickResult() {
-        SpawnEggItem spawnEggItem = SpawnEggItem.byId(this.getType());
-        return spawnEggItem == null ? null : new ItemStack(spawnEggItem);
+        SpawnEggItem itemmonsteregg = SpawnEggItem.byId(this.getType());
+
+        return itemmonsteregg == null ? null : new ItemStack(itemmonsteregg);
     }
 }
