[Bug] Primal weather no longer persists if last mon dies to indirect damage (#3492)

* Fixed Delta Stream remaining active when last mon dies to indirect damage

* Rebasing changes

* Linting fix

* Combined if statements

* Changed params to optional

* Added unit test

* Apply suggestions from code review

* Fix test and remove `.js` from import

---------

Co-authored-by: NightKev <34855794+DayKev@users.noreply.github.com>

src/data/ability.ts

@@ -3923,7 +3923,7 @@ export class PostBattleLootAbAttr extends PostBattleAbAttr {
 }
 
 export class PostFaintAbAttr extends AbAttr {
-  applyPostFaint(pokemon: Pokemon, passive: boolean, simulated: boolean, attacker: Pokemon, move: Move, hitResult: HitResult, args: any[]): boolean {
+  applyPostFaint(pokemon: Pokemon, passive: boolean, simulated: boolean, attacker?: Pokemon, move?: Move, hitResult?: HitResult, ...args: any[]): boolean {
     return false;
   }
 }
@@ -3974,7 +3974,7 @@ export class PostFaintClearWeatherAbAttr extends PostFaintAbAttr {
    * @param args N/A
    * @returns {boolean} Returns true if the weather clears, otherwise false.
    */
-  applyPostFaint(pokemon: Pokemon, passive: boolean, simulated: boolean, attacker: Pokemon, move: Move, hitResult: HitResult, args: any[]): boolean {
+  applyPostFaint(pokemon: Pokemon, passive: boolean, simulated: boolean, attacker?: Pokemon, move?: Move, hitResult?: HitResult, ...args: any[]): boolean {
     const weatherType = pokemon.scene.arena.weather?.weatherType;
     let turnOffWeather = false;
 
@@ -4022,8 +4022,8 @@ export class PostFaintContactDamageAbAttr extends PostFaintAbAttr {
     this.damageRatio = damageRatio;
   }
 
-  applyPostFaint(pokemon: Pokemon, passive: boolean, simulated: boolean, attacker: Pokemon, move: Move, hitResult: HitResult, args: any[]): boolean {
+  applyPostFaint(pokemon: Pokemon, passive: boolean, simulated: boolean, attacker?: Pokemon, move?: Move, hitResult?: HitResult, ...args: any[]): boolean {
-    if (move.checkFlag(MoveFlags.MAKES_CONTACT, attacker, pokemon)) {
+    if (move !== undefined && attacker !== undefined && move.checkFlag(MoveFlags.MAKES_CONTACT, attacker, pokemon)) {  //If the mon didn't die to indirect damage
       const cancelled = new Utils.BooleanHolder(false);
       pokemon.scene.getField(true).map(p => applyAbAttrs(FieldPreventExplosiveMovesAbAttr, p, cancelled, simulated));
       if (cancelled.value || attacker.hasAbilityWithAttr(BlockNonDirectDamageAbAttr)) {
@@ -4052,8 +4052,8 @@ export class PostFaintHPDamageAbAttr extends PostFaintAbAttr {
     super ();
   }
 
-  applyPostFaint(pokemon: Pokemon, passive: boolean, simulated: boolean, attacker: Pokemon, move: Move, hitResult: HitResult, args: any[]): boolean {
+  applyPostFaint(pokemon: Pokemon, passive: boolean, simulated: boolean, attacker?: Pokemon, move?: Move, hitResult?: HitResult, ...args: any[]): boolean {
-    if (!simulated) {
+    if (move !== undefined && attacker !== undefined && !simulated) { //If the mon didn't die to indirect damage
       const damage = pokemon.turnData.attacksReceived[0].damage;
       attacker.damageAndUpdate((damage), HitResult.OTHER);
       attacker.turnData.damageTaken += damage;
@@ -4711,7 +4711,7 @@ export function applyPostBattleAbAttrs(attrType: Constructor<PostBattleAbAttr>,
 }
 
 export function applyPostFaintAbAttrs(attrType: Constructor<PostFaintAbAttr>,
-  pokemon: Pokemon, attacker: Pokemon, move: Move, hitResult: HitResult, simulated: boolean = false, ...args: any[]): Promise<void> {
+  pokemon: Pokemon, attacker?: Pokemon, move?: Move, hitResult?: HitResult, simulated: boolean = false, ...args: any[]): Promise<void> {
   return applyAbAttrsInternal<PostFaintAbAttr>(attrType, pokemon, (attr, passive) => attr.applyPostFaint(pokemon, passive, simulated, attacker, move, hitResult, args), args, false, simulated);
 }
 

src/phases/faint-phase.ts

@@ -65,6 +65,8 @@ export class FaintPhase extends PokemonPhase {
     if (pokemon.turnData?.attacksReceived?.length) {
       const lastAttack = pokemon.turnData.attacksReceived[0];
       applyPostFaintAbAttrs(PostFaintAbAttr, pokemon, this.scene.getPokemonById(lastAttack.sourceId)!, new PokemonMove(lastAttack.move).getMove(), lastAttack.result); // TODO: is this bang correct?
+    } else { //If killed by indirect damage, apply post-faint abilities without providing a last move
+      applyPostFaintAbAttrs(PostFaintAbAttr, pokemon);
     }
 
     const alivePlayField = this.scene.getField(true);

src/test/arena/weather_strong_winds.test.ts

@@ -1,4 +1,5 @@
 import { allMoves } from "#app/data/move";
+import { StatusEffect } from "#app/enums/status-effect";
 import { TurnStartPhase } from "#app/phases/turn-start-phase";
 import { Abilities } from "#enums/abilities";
 import { Moves } from "#enums/moves";
@@ -33,7 +34,7 @@ describe("Weather - Strong Winds", () => {
   it("electric type move is not very effective on Rayquaza", async () => {
     game.override.enemySpecies(Species.RAYQUAZA);
 
-    await game.startBattle([Species.PIKACHU]);
+    await game.classicMode.startBattle([Species.PIKACHU]);
     const pikachu = game.scene.getPlayerPokemon()!;
     const enemy = game.scene.getEnemyPokemon()!;
 
@@ -44,7 +45,7 @@ describe("Weather - Strong Winds", () => {
   });
 
   it("electric type move is neutral for flying type pokemon", async () => {
-    await game.startBattle([Species.PIKACHU]);
+    await game.classicMode.startBattle([Species.PIKACHU]);
     const pikachu = game.scene.getPlayerPokemon()!;
     const enemy = game.scene.getEnemyPokemon()!;
 
@@ -55,7 +56,7 @@ describe("Weather - Strong Winds", () => {
   });
 
   it("ice type move is neutral for flying type pokemon", async () => {
-    await game.startBattle([Species.PIKACHU]);
+    await game.classicMode.startBattle([Species.PIKACHU]);
     const pikachu = game.scene.getPlayerPokemon()!;
     const enemy = game.scene.getEnemyPokemon()!;
 
@@ -66,7 +67,7 @@ describe("Weather - Strong Winds", () => {
   });
 
   it("rock type move is neutral for flying type pokemon", async () => {
-    await game.startBattle([Species.PIKACHU]);
+    await game.classicMode.startBattle([Species.PIKACHU]);
     const pikachu = game.scene.getPlayerPokemon()!;
     const enemy = game.scene.getEnemyPokemon()!;
 
@@ -75,4 +76,18 @@ describe("Weather - Strong Winds", () => {
     await game.phaseInterceptor.to(TurnStartPhase);
     expect(enemy.getAttackTypeEffectiveness(allMoves[Moves.ROCK_SLIDE].type, pikachu)).toBe(1);
   });
+
+  it("weather goes away when last trainer pokemon dies to indirect damage", async () => {
+    game.override.enemyStatusEffect(StatusEffect.POISON);
+
+    await game.classicMode.startBattle([Species.MAGIKARP]);
+
+    const enemy = game.scene.getEnemyPokemon()!;
+    enemy.hp = 1;
+
+    game.move.select(Moves.SPLASH);
+    await game.phaseInterceptor.to("TurnEndPhase");
+
+    expect(game.scene.arena.weather?.weatherType).toBeUndefined();
+  });
 });