From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Jason Penilla <11360596+jpenilla@users.noreply.github.com>
Date: Thu, 20 Aug 2020 17:38:12 -0700
Subject: [PATCH] Customizable wither health and healing

Adds the ability to customize the health of the wither, as well as the amount that it heals, and how often.

diff --git a/src/main/java/net/minecraft/world/entity/boss/wither/WitherBoss.java b/src/main/java/net/minecraft/world/entity/boss/wither/WitherBoss.java
index 1c8f6863b976cfcb559de9b3e3cf9292831166ee..7858e97db83085721310f7c9e35abe0b944b3b1f 100644
--- a/src/main/java/net/minecraft/world/entity/boss/wither/WitherBoss.java
+++ b/src/main/java/net/minecraft/world/entity/boss/wither/WitherBoss.java
@@ -97,6 +97,13 @@ public class WitherBoss extends Monster implements PowerableMob, RangedAttackMob
         this.xpReward = 50;
     }
 
+    // Purpur start
+    @Override
+    public void initAttributes() {
+        this.getAttribute(Attributes.MAX_HEALTH).setBaseValue(level.purpurConfig.witherMaxHealth);
+    }
+    // Purpur end
+
     @Override
     protected void registerGoals() {
         this.goalSelector.addGoal(0, new WitherBoss.WitherDoNothingGoal());
@@ -288,7 +295,7 @@ public class WitherBoss extends Monster implements PowerableMob, RangedAttackMob
 
             this.setInvulnerableTicks(i);
             if (this.tickCount % 10 == 0) {
-                this.heal(10.0F, EntityRegainHealthEvent.RegainReason.WITHER_SPAWN); // CraftBukkit
+                this.heal(this.getMaxHealth() / 33, EntityRegainHealthEvent.RegainReason.WITHER_SPAWN); // CraftBukkit // Purpur - use max health for healing instead of a constant
             }
 
         } else {
@@ -381,8 +388,10 @@ public class WitherBoss extends Monster implements PowerableMob, RangedAttackMob
                 }
             }
 
-            if (this.tickCount % 20 == 0) {
-                this.heal(1.0F, EntityRegainHealthEvent.RegainReason.REGEN); // CraftBukkit
+            // Purpur start - customizable heal rate and amount
+            if (this.tickCount % level.purpurConfig.witherHealthRegenDelay == 0) {
+                this.heal(level.purpurConfig.witherHealthRegenAmount, EntityRegainHealthEvent.RegainReason.REGEN); // CraftBukkit
+                // Purpur end
             }
 
             this.bossEvent.setProgress(this.getHealth() / this.getMaxHealth());
diff --git a/src/main/java/net/pl3x/purpur/PurpurWorldConfig.java b/src/main/java/net/pl3x/purpur/PurpurWorldConfig.java
index a6a6b766b5dc5b3743aecd0a2c8021d04df1d8d2..2681463ae89ea4e0746425114feb24aed0f34cb3 100644
--- a/src/main/java/net/pl3x/purpur/PurpurWorldConfig.java
+++ b/src/main/java/net/pl3x/purpur/PurpurWorldConfig.java
@@ -992,9 +992,20 @@ public class PurpurWorldConfig {
 
     public boolean witherRidable = false;
     public boolean witherRidableInWater = false;
+    public float witherHealthRegenAmount = 1.0f;
+    public int witherHealthRegenDelay = 20;
+    public double witherMaxHealth = 300.0D;
     private void witherSettings() {
         witherRidable = getBoolean("mobs.wither.ridable", witherRidable);
         witherRidableInWater = getBoolean("mobs.wither.ridable-in-water", witherRidableInWater);
+        witherHealthRegenAmount = (float) getDouble("mobs.wither.health-regen-amount", witherHealthRegenAmount);
+        witherHealthRegenDelay = getInt("mobs.wither.health-regen-delay", witherHealthRegenDelay);
+        if (PurpurConfig.version < 8) {
+            double oldValue = getDouble("mobs.wither.max-health", witherMaxHealth);
+            set("mobs.wither.attributes.max-health", oldValue);
+            set("mobs.wither.max-health", null);
+        }
+        witherMaxHealth = getDouble("mobs.wither.attributes.max-health", witherMaxHealth);
     }
 
     public boolean witherSkeletonRidable = false;