fix: Check for max level

src/main/java/com/azuredoom/levelingcore/compat/party/PartyPluginCompat.java

@@ -30,7 +30,7 @@ public static void onXPGain(
         var cfg = config.get();
         var party = PartyManager.getInstance().getPartyDataById(playerUuid);
         if (party == null || !cfg.isEnablePartyPluginXPShareCompat()) {
-            if (!cfg.isDisableXPGainNotification()) {
+            if (!cfg.isDisableXPGainNotification() && !levelService.isMaxLevel(playerUuid)) {
                 NotificationsUtil.sendXPGainNotification(playerRef, xp);
             }
             levelService.addXp(playerUuid, xp);
@@ -100,7 +100,7 @@ public static void onXPGain(
 
             var player = Universe.get().getPlayer(uuid);
 
-            if (!cfg.isDisableXPGainNotification()) {
+            if (!cfg.isDisableXPGainNotification() && !levelService.isMaxLevel(uuid)) {
                 if (player != null) {
                     NotificationsUtil.sendXPGainNotification(
                         player,

src/main/java/com/azuredoom/levelingcore/compat/party/PartyProCompat.java

@@ -30,7 +30,7 @@ public static void onXPGain(
         var cfg = config.get();
         var party = PartyProAPI.getInstance().getPartyByPlayer(playerUuid);
         if (party == null || !cfg.isEnablePartyPluginXPShareCompat()) {
-            if (!cfg.isDisableXPGainNotification()) {
+            if (!cfg.isDisableXPGainNotification() && !levelService.isMaxLevel(playerUuid)) {
                 NotificationsUtil.sendXPGainNotification(playerRef, xp);
             }
             levelService.addXp(playerUuid, xp);
@@ -100,7 +100,7 @@ public static void onXPGain(
 
             var player = Universe.get().getPlayer(uuid);
 
-            if (!cfg.isDisableXPGainNotification()) {
+            if (!cfg.isDisableXPGainNotification() && !levelService.isMaxLevel(uuid)) {
                 if (player != null) {
                     NotificationsUtil.sendXPGainNotification(
                         player,

src/main/java/com/azuredoom/levelingcore/level/LevelServiceImpl.java

@@ -7,6 +7,7 @@
 import com.azuredoom.levelingcore.level.formulas.LevelFormula;
 import com.azuredoom.levelingcore.listeners.*;
 import com.azuredoom.levelingcore.playerdata.PlayerLevelData;
+import com.azuredoom.levelingcore.utils.LevelingUtil;
 
 /**
  * Used for managing player levels and experience points (XP). This class provides methods to retrieve, modify, and
@@ -83,6 +84,16 @@ public int getLevel(UUID id) {
         return formula.getLevelForXp(get(id).getXp());
     }
 
+    /**
+     * Checks if a player has reached the maximum level based on their current experience points (XP).
+     *
+     * @param id The unique identifier (UUID) of the player whose level is being checked.
+     * @return {@code true} if the player is at the maximum level, {@code false} otherwise.
+     */
+    public boolean isMaxLevel(UUID id) {
+        return getLevel(id) >= LevelingUtil.computeMaxLevel();
+    }
+
     public void addLevel(UUID id, int level) {
         if (level == 0) {
             return;
@@ -186,6 +197,11 @@ public void addXp(UUID id, long amount) {
         var data = get(id);
         var oldLevel = getLevel(id);
 
+        if (isMaxLevel(id)) {
+            setDataXP(data, formula.getXpForLevel(oldLevel));
+            return;
+        }
+
         setDataXP(data, data.getXp() + amount);
 
         xpGainListeners.forEach(l -> l.onXpGain(id, amount));

src/main/java/com/azuredoom/levelingcore/systems/xp/GainXPEventSystem.java

@@ -138,7 +138,11 @@ public void onComponentAdded(
                             );
                         } else {
                             // Fallback to default XP gain if supported Party mods are not installed
-                            if (!config.get().isDisableXPGainNotification())
+                            if (
+                                !config.get().isDisableXPGainNotification() && !levelService.isMaxLevel(
+                                    player.getUuid()
+                                )
+                            )
                                 NotificationsUtil.sendXPGainNotification(
                                     playerRef,
                                     xpAmount

src/main/java/com/azuredoom/levelingcore/utils/MobLevelingUtil.java

@@ -71,7 +71,7 @@ public static boolean applyMobScaling(
             return false;
 
         store.getExternalData().getWorld().execute(() -> {
-            var healthMult = 1F + ((float) level - 1F) * config.get().getMobHealthMultiplier();
+            var healthMult = Math.max(1f, (float) level * config.get().getMobHealthMultiplier());
             var stats = store.getComponent(npc.getReference(), EntityStatMap.getComponentType());
             var healthIndex = DefaultEntityStatTypes.getHealth();
             var modifier = new StaticModifier(
@@ -138,18 +138,25 @@ public static int computeBiomeLevel(Store<EntityStore> store, NPCEntity npc) {
     public static int computeEnvironmentLevel(TransformComponent transform, Store<EntityStore> store, NPCEntity npc) {
         var world = store.getExternalData().getWorld();
         var mobPos = transform.getPosition();
-        var chunk = world.getChunk(ChunkUtil.indexChunkFromBlock((int) mobPos.x, (int) mobPos.z));
+        var chunk = world.getChunkIfInMemory(ChunkUtil.indexChunkFromBlock((int) mobPos.x, (int) mobPos.z));
 
         if (chunk == null) {
             LevelingCore.LOGGER.at(Level.WARNING)
                 .log(
-                    "Chunk does not exist; defaulting to 1"
+                    "Chunk not in memory; defaulting to 1"
                 );
             return 1;
         }
 
         int envID = chunk.getBlockChunk().getEnvironment(mobPos);
         var envAsset = Environment.getAssetMap().getAsset(envID);
+        if (envAsset == null) {
+            LevelingCore.LOGGER.at(Level.WARNING)
+                .log(
+                    "Environment id " + envID + " does not exist in asset registry; defaulting to 1"
+                );
+            return 1;
+        }
         var envName = envAsset.getId();
 
         if (envName == null) {