[P1 Bug] Fix multi lens granting infinite Future Sight hits (#4961)

* [P1 Bug] Fix multi lens granting infinite Future Sight hits

* Updated `.partial()` tags

* Added corresponding TODO comments to tests

src/data/move.ts

@@ -8666,7 +8666,7 @@ export function initMoves() {
       .attr(StatStageChangeAttr, [ Stat.SPDEF ], -1)
       .ballBombMove(),
     new AttackMove(Moves.FUTURE_SIGHT, Type.PSYCHIC, MoveCategory.SPECIAL, 120, 100, 10, -1, 0, 2)
-      .partial() // cannot be used on multiple Pokemon on the same side in a double battle, hits immediately when called by Metronome/etc
+      .partial() // cannot be used on multiple Pokemon on the same side in a double battle, hits immediately when called by Metronome/etc, should not apply abilities or held items if user is off the field
       .ignoresProtect()
       .attr(DelayedAttackAttr, ArenaTagType.FUTURE_SIGHT, ChargeAnim.FUTURE_SIGHT_CHARGING, i18next.t("moveTriggers:foresawAnAttack", { pokemonName: "{USER}" })),
     new AttackMove(Moves.ROCK_SMASH, Type.FIGHTING, MoveCategory.PHYSICAL, 40, 100, 15, 50, 0, 2)
@@ -8976,7 +8976,7 @@ export function initMoves() {
       .attr(ConfuseAttr)
       .pulseMove(),
     new AttackMove(Moves.DOOM_DESIRE, Type.STEEL, MoveCategory.SPECIAL, 140, 100, 5, -1, 0, 3)
-      .partial() // cannot be used on multiple Pokemon on the same side in a double battle, hits immediately when called by Metronome/etc
+      .partial() // cannot be used on multiple Pokemon on the same side in a double battle, hits immediately when called by Metronome/etc, should not apply abilities or held items if user is off the field
       .ignoresProtect()
       .attr(DelayedAttackAttr, ArenaTagType.DOOM_DESIRE, ChargeAnim.DOOM_DESIRE_CHARGING, i18next.t("moveTriggers:choseDoomDesireAsDestiny", { pokemonName: "{USER}" })),
     new AttackMove(Moves.PSYCHO_BOOST, Type.PSYCHIC, MoveCategory.SPECIAL, 140, 90, 5, -1, 0, 3)

src/phases/move-effect-phase.ts

@@ -56,7 +56,7 @@ import {
   PokemonMultiHitModifier,
 } from "#app/modifier/modifier";
 import { PokemonPhase } from "#app/phases/pokemon-phase";
-import { BooleanHolder, executeIf, NumberHolder } from "#app/utils";
+import { BooleanHolder, executeIf, isNullOrUndefined, NumberHolder } from "#app/utils";
 import { BattlerTagType } from "#enums/battler-tag-type";
 import { Moves } from "#enums/moves";
 import i18next from "i18next";
@@ -106,9 +106,11 @@ export class MoveEffectPhase extends PokemonPhase {
            */
           return super.end();
         }
+        if (isNullOrUndefined(user.turnData)) {
           user.resetTurnData();
         }
       }
+    }
 
     /**
      * Does an effect from this move override other effects on this turn?

src/test/abilities/parental_bond.test.ts

@@ -1,5 +1,5 @@
 import { Type } from "#enums/type";
-import { BattlerTagType } from "#app/enums/battler-tag-type";
+import { BattlerTagType } from "#enums/battler-tag-type";
 import { toDmgValue } from "#app/utils";
 import { Abilities } from "#enums/abilities";
 import { Moves } from "#enums/moves";
@@ -8,7 +8,7 @@ import { Stat } from "#enums/stat";
 import { StatusEffect } from "#enums/status-effect";
 import GameManager from "#test/utils/gameManager";
 import Phaser from "phaser";
-import { afterEach, beforeAll, beforeEach, describe, expect, it } from "vitest";
+import { afterEach, beforeAll, beforeEach, describe, expect, it, vi } from "vitest";
 
 
 describe("Abilities - Parental Bond", () => {
@@ -470,4 +470,25 @@ describe("Abilities - Parental Bond", () => {
       expect(enemyPokemon.getStatStage(Stat.SPATK)).toBe(1);
     }
   );
+
+  it("should not allow Future Sight to hit infinitely many times if the user switches out", async () => {
+    game.override.enemyLevel(1000)
+      .moveset(Moves.FUTURE_SIGHT);
+    await game.classicMode.startBattle([ Species.BULBASAUR, Species.CHARMANDER, Species.SQUIRTLE ]);
+
+    const enemyPokemon = game.scene.getEnemyPokemon()!;
+    vi.spyOn(enemyPokemon, "damageAndUpdate");
+
+    game.move.select(Moves.FUTURE_SIGHT);
+    await game.toNextTurn();
+
+    game.doSwitchPokemon(1);
+    await game.toNextTurn();
+
+    game.doSwitchPokemon(2);
+    await game.toNextTurn();
+
+    // TODO: Update hit count to 1 once Future Sight is fixed to not activate abilities if user is off the field
+    expect(enemyPokemon.damageAndUpdate).toHaveBeenCalledTimes(2);
+  });
 });

src/test/items/multi_lens.test.ts

@@ -24,7 +24,7 @@ describe("Items - Multi Lens", () => {
   beforeEach(() => {
     game = new GameManager(phaserGame);
     game.override
-      .moveset([ Moves.TACKLE, Moves.TRAILBLAZE, Moves.TACHYON_CUTTER ])
+      .moveset([ Moves.TACKLE, Moves.TRAILBLAZE, Moves.TACHYON_CUTTER, Moves.FUTURE_SIGHT ])
       .ability(Abilities.BALL_FETCH)
       .startingHeldItems([{ name: "MULTI_LENS" }])
       .battleType("single")
@@ -170,6 +170,7 @@ describe("Items - Multi Lens", () => {
     await game.phaseInterceptor.to("MoveEndPhase");
     expect(enemyPokemon.getHpRatio()).toBeCloseTo(0.5, 5);
   });
+
   it("should result in correct damage for hp% attacks with 2 lenses + Parental Bond", async () => {
     game.override.startingHeldItems([{ name: "MULTI_LENS", count: 2 }])
       .moveset(Moves.SUPER_FANG)
@@ -188,4 +189,24 @@ describe("Items - Multi Lens", () => {
     await game.phaseInterceptor.to("MoveEndPhase");
     expect(enemyPokemon.getHpRatio()).toBeCloseTo(0.25, 5);
   });
+
+  it("should not allow Future Sight to hit infinitely many times if the user switches out", async () => {
+    game.override.enemyLevel(1000);
+    await game.classicMode.startBattle([ Species.BULBASAUR, Species.CHARMANDER, Species.SQUIRTLE ]);
+
+    const enemyPokemon = game.scene.getEnemyPokemon()!;
+    vi.spyOn(enemyPokemon, "damageAndUpdate");
+
+    game.move.select(Moves.FUTURE_SIGHT);
+    await game.toNextTurn();
+
+    game.doSwitchPokemon(1);
+    await game.toNextTurn();
+
+    game.doSwitchPokemon(2);
+    await game.toNextTurn();
+
+    // TODO: Update hit count to 1 once Future Sight is fixed to not activate held items if user is off the field
+    expect(enemyPokemon.damageAndUpdate).toHaveBeenCalledTimes(2);
+  });
 });