Always create separate ability phases for passive and use boolean instead of priority number when applying

src/data/ability.ts

@@ -5172,7 +5172,6 @@ function applySingleAbAttrs<TAttr extends AbAttr>(
   args: any[],
   gainedMidTurn = false,
   simulated = false,
-  priorityCondition?: (p: number) => boolean,
   messages: string[] = []
 ) {
   if (!pokemon?.canApplyAbility(passive) || (passive && (pokemon.getPassiveAbility().id === pokemon.getAbility().id))) {
@@ -5180,10 +5179,7 @@ function applySingleAbAttrs<TAttr extends AbAttr>(
   }
 
   const ability = passive ? pokemon.getPassiveAbility() : pokemon.getAbility();
-  if (
+  if (gainedMidTurn && ability.getAttrs(attrType).some(attr => attr instanceof PostSummonAbAttr && !attr.shouldActivateOnGain())) {
-    gainedMidTurn && ability.getAttrs(attrType).some(attr => attr instanceof PostSummonAbAttr && !attr.shouldActivateOnGain())
-    || (priorityCondition && !priorityCondition(ability.postSummonPriority))
-      ) {
     return;
   }
 
@@ -5485,7 +5481,6 @@ export class PostDamageForceSwitchAbAttr extends PostDamageAbAttr {
  * @param simulated `true` if the call is simulated and the battle state should not be changes
  * @param messages Array of messages which will be added to if the ability displays a message
  * @param gainedMidTurn `true` if the ability is activating because it was gained during the battle
- * @param priorityCondition If defined, only abilities with priority that meets the condition will be applied
  */
 function applyAbAttrsInternal<TAttr extends AbAttr>(
   attrType: Constructor<TAttr>,
@@ -5496,11 +5491,10 @@ function applyAbAttrsInternal<TAttr extends AbAttr>(
   simulated: boolean = false,
   messages: string[] = [],
   gainedMidTurn = false,
-  priorityCondition?: (p: number) => boolean
 ) {
   for (const passive of [ false, true ]) {
     if (pokemon) {
-      applySingleAbAttrs(pokemon, passive, attrType, applyFunc, successFunc, args, gainedMidTurn, simulated, priorityCondition, messages);
+      applySingleAbAttrs(pokemon, passive, attrType, applyFunc, successFunc, args, gainedMidTurn, simulated, messages);
       globalScene.clearPhaseQueueSplice();
     }
   }
@@ -5746,20 +5740,19 @@ export function applyPostVictoryAbAttrs(
 export function applyPostSummonAbAttrs(
   attrType: Constructor<PostSummonAbAttr>,
   pokemon: Pokemon,
+  passive = false,
   simulated = false,
-  priorityCondition?: (p: number) => boolean,
   ...args: any[]
 ): void {
-  applyAbAttrsInternal<PostSummonAbAttr>(
+  applySingleAbAttrs<PostSummonAbAttr>(
-    attrType,
     pokemon,
+    passive,
+    attrType,
     (attr, passive) => attr.applyPostSummon(pokemon, passive, simulated, args),
     (attr, passive) => attr.canApplyPostSummon(pokemon, passive, simulated, args),
     args,
-    simulated,
-    [],
     false,
-    priorityCondition
+    simulated
   );
 }
 

src/data/phase-priority-queue.ts

@@ -70,8 +70,8 @@ export class PostSummonPhasePriorityQueue extends PhasePriorityQueue {
   private queueAbilityPhase(phase: PostSummonPhase): void {
     const phasePokemon = phase.getPokemon();
 
-    phasePokemon.getAbilityPriorities().forEach(priority => {
+    phasePokemon.getAbilityPriorities().forEach((priority, idx) => {
-      this.queue.push(new PostSummonActivateAbilityPhase(phasePokemon.getBattlerIndex(), priority));
+      this.queue.push(new PostSummonActivateAbilityPhase(phasePokemon.getBattlerIndex(), priority, !!idx));
       globalScene.appendToPhase(
         new ActivatePriorityQueuePhase(DynamicPhaseType.POST_SUMMON),
         ActivatePriorityQueuePhase,

src/field/pokemon.ts

@@ -2265,8 +2265,8 @@ export default abstract class Pokemon extends Phaser.GameObjects.Container {
     return false;
   }
 
-  public getAbilityPriorities(): Set<number> {
+  public getAbilityPriorities(): number[] {
-    return new Set([ this.getAbility().postSummonPriority, this.getPassiveAbility().postSummonPriority ]);
+    return [this.getAbility().postSummonPriority, this.getPassiveAbility().postSummonPriority];
   }
 
   /**

src/phases/post-summon-phase.ts

@@ -40,22 +40,20 @@ export class PostSummonPhase extends PokemonPhase {
 }
 
 /**
- * Phase to apply (post-summon) ability attributes for abilities with nonzero priority
+ * Helper to {@linkcode PostSummonPhase} which applies abilities
- *
- * Priority abilities activate before others and before hazards
- *
- * @see Example - {@link https://bulbapedia.bulbagarden.net/wiki/Neutralizing_Gas_(Ability) | Neutralizing Gas}
  */
 export class PostSummonActivateAbilityPhase extends PostSummonPhase {
   private priority: number;
+  private passive: boolean;
 
-  constructor(battlerIndex: BattlerIndex, priority: number) {
+  constructor(battlerIndex: BattlerIndex, priority: number, passive: boolean) {
     super(battlerIndex);
     this.priority = priority;
+    this.passive = passive;
   }
 
   start() {
-    applyPostSummonAbAttrs(PostSummonAbAttr, this.getPokemon(), false, (p: number) => p === this.priority);
+    applyPostSummonAbAttrs(PostSummonAbAttr, this.getPokemon(), this.passive, false);
 
     this.end();
   }