Correctly initialize HP of resurrected Inferno mobs

src/main/java/io/blert/challenges/inferno/InfernoNpc.java

@@ -23,6 +23,7 @@
 
 package io.blert.challenges.inferno;
 
+import io.blert.core.Hitpoints;
 import io.blert.core.NpcAttack;
 import java.util.Optional;
 import lombok.Getter;
@@ -105,6 +106,23 @@ boolean isPillar() {
         return this == ROCKY_SUPPORT;
     }
 
+    boolean isResurrectable() {
+        switch (this) {
+            case BAT:
+            case BLOB:
+            case MELEER:
+            case RANGER:
+            case MAGER:
+                return true;
+            default:
+                return false;
+        }
+    }
+
+    Hitpoints resurrectedHitpoints() {
+        return new Hitpoints((hitpoints + 1) / 2, hitpoints);
+    }
+
     @SafeVarargs
     InfernoNpc(int id, int hitpoints, Pair<Integer, NpcAttack>... attacks) {
         this.id = id;

src/main/java/io/blert/challenges/inferno/WaveDataTracker.java

@@ -69,13 +69,16 @@ protected void start() {
         }
 
         // NPC spawn events are typically received before the wave start message,
-        // so capture any NPCs that are already present.
-        client.getTopLevelWorldView().npcs().stream().forEach(npc -> {
-            InfernoNpc.withId(npc.getId())
-                    .filter(inf -> !inf.isPillar())
-                    .ifPresent(infernoNpc -> addTrackedNpc(
-                            new BasicTrackedNpc(npc, generateRoomId(npc), new Hitpoints(infernoNpc.getHitpoints()))));
-        });
+        // so capture any NPCs that are already present, ignoring those already
+        // captured during NOT_STARTED.
+        client.getTopLevelWorldView().npcs().stream()
+                .filter(npc -> getTrackedNpcs().getByNpc(npc).isEmpty())
+                .forEach(npc -> {
+                    InfernoNpc.withId(npc.getId())
+                            .filter(inf -> !inf.isPillar())
+                            .ifPresent(infernoNpc -> addTrackedNpc(new BasicTrackedNpc(
+                                    npc, generateRoomId(npc), new Hitpoints(infernoNpc.getHitpoints()))));
+                });
     }
 
     @Override
@@ -88,8 +91,12 @@ protected Optional<? extends TrackedNpc> onNpcSpawn(NpcSpawned event) {
                 // Pillars are managed by the challenge itself.
                 return Optional.empty();
             }
-            return Optional.of(new BasicTrackedNpc(
-                    event.getNpc(), generateRoomId(event.getNpc()), new Hitpoints(npc.getHitpoints())));
+
+            Hitpoints hitpoints = getTick() > 0 && wave <= 66 && npc.isResurrectable()
+                    ? npc.resurrectedHitpoints()
+                    : new Hitpoints(npc.getHitpoints());
+
+            return Optional.of(new BasicTrackedNpc(event.getNpc(), generateRoomId(event.getNpc()), hitpoints));
         });
     }