pre_damage MoveEffectTrigger

src/data/move.ts

@@ -433,6 +433,7 @@ export abstract class MoveAttr {
 
 export enum MoveEffectTrigger {
   PRE_APPLY,
+  PRE_DAMAGE,
   POST_APPLY,
   HIT
 }
@@ -2769,7 +2770,7 @@ export class RemoveScreensAttr extends MoveEffectAttr {
   private targetBothSides: boolean;
 
   constructor(targetBothSides: boolean = false) {
-    super(true, MoveEffectTrigger.PRE_APPLY);
+    super(true, MoveEffectTrigger.PRE_DAMAGE);
     this.targetBothSides = targetBothSides;
   }
 
@@ -2778,6 +2779,9 @@ export class RemoveScreensAttr extends MoveEffectAttr {
     if (!super.apply(user, target, move, args))
       return false;
 
+    if ((args[0] as Utils.BooleanHolder).value) // isTypeImmune
+      return false;
+
     if(this.targetBothSides){
       user.scene.arena.removeTagOnSide(ArenaTagType.REFLECT, ArenaTagSide.PLAYER);
       user.scene.arena.removeTagOnSide(ArenaTagType.LIGHT_SCREEN, ArenaTagSide.PLAYER);
@@ -2798,6 +2802,51 @@ export class RemoveScreensAttr extends MoveEffectAttr {
   }
 }
 
+export class StealStatBoostsAttr extends MoveEffectAttr {
+
+  constructor() {
+    super(false, MoveEffectTrigger.PRE_DAMAGE);
+  }
+  
+  apply(user: Pokemon, target: Pokemon, move: Move, args: any[]): boolean {
+    if (!super.apply(user, target, move, args))
+      return false;
+
+    if ((args[0] as Utils.BooleanHolder).value) // isTypeImmune
+      return false;
+
+    let stoleStats = false;
+    let stolenStatBoosts = target.summonData.battleStats.map(stat => {
+      if (stat > 0) {
+        stoleStats = true;
+        return stat;
+      }
+      return 0;
+    });
+
+    if (!stoleStats)
+      return false;
+
+    // directly set to 0 as opposed to "change" them to ignore abilities
+    for (let s = 0; s < target.summonData.battleStats.length; s++)
+      target.summonData.battleStats[s] = Math.min(target.summonData.battleStats[s], 0);
+    target.scene.queueMessage(getPokemonMessage(target, `'s stat boosts\nwere eliminated!`));
+
+    // accounting for StatChangePhase requiring a list of stats and a single amount to change by
+    let statsByLevel = {1: [], 2: [], 3: [], 4: [], 5: [], 6: []};
+    for (let [stat, boost] of stolenStatBoosts.entries()) {
+      statsByLevel[boost]?.push(stat);
+    }
+    for (let level = 1; level <= 6; level++) {
+      if(statsByLevel[level].empty)
+        continue
+      // stat change must be immediate to be ready for damage calculation
+      user.scene.unshiftPhase(new StatChangePhase(user.scene, user.getBattlerIndex(), true, statsByLevel[level], level, true, false, true));
+    }
+    return true;
+  }
+}
+
 export class ForceSwitchOutAttr extends MoveEffectAttr {
   private user: boolean;
   private batonPass: boolean;
@@ -3818,7 +3867,7 @@ export function initMoves() {
     new AttackMove(Moves.ACID, Type.POISON, MoveCategory.SPECIAL, 40, 100, 30, 10, 0, 1)
       .attr(StatChangeAttr, BattleStat.SPDEF, -1)
       .target(MoveTarget.ALL_NEAR_ENEMIES),
-    new AttackMove(Moves.EMBER, Type.FIRE, MoveCategory.SPECIAL, 40, 100, 25, 10, 0, 1)
+    new AttackMove(Moves.EMBER, Type.FIRE, MoveCategory.SPECIAL, 40, 100, 25, 100, 0, 1)
       .attr(StatusEffectAttr, StatusEffect.BURN),
     new AttackMove(Moves.FLAMETHROWER, Type.FIRE, MoveCategory.SPECIAL, 90, 100, 15, 10, 0, 1)
       .attr(StatusEffectAttr, StatusEffect.BURN),
@@ -5592,7 +5641,7 @@ export function initMoves() {
     new AttackMove(Moves.PRISMATIC_LASER, Type.PSYCHIC, MoveCategory.SPECIAL, 160, 100, 10, -1, 0, 7)
       .attr(RechargeAttr),
     new AttackMove(Moves.SPECTRAL_THIEF, Type.GHOST, MoveCategory.PHYSICAL, 90, 100, 10, -1, 0, 7)
-      .partial(),
+      .attr(StealStatBoostsAttr),
     new AttackMove(Moves.SUNSTEEL_STRIKE, Type.STEEL, MoveCategory.PHYSICAL, 100, 100, 5, -1, 0, 7)
       .ignoresAbilities()
       .partial(),

src/field/pokemon.ts

@@ -4,7 +4,7 @@ import { Variant, VariantSet, variantColorCache } from '#app/data/variant';
 import { variantData } from '#app/data/variant';
 import BattleInfo, { PlayerBattleInfo, EnemyBattleInfo } from '../ui/battle-info';
 import { Moves } from "../data/enums/moves";
-import Move, { HighCritAttr, HitsTagAttr, applyMoveAttrs, FixedDamageAttr, VariableAtkAttr, VariablePowerAttr, allMoves, MoveCategory, TypelessAttr, CritOnlyAttr, getMoveTargets, OneHitKOAttr, MultiHitAttr, StatusMoveTypeImmunityAttr, MoveTarget, VariableDefAttr, AttackMove, ModifiedDamageAttr, VariableMoveTypeMultiplierAttr, IgnoreOpponentStatChangesAttr, SacrificialAttr, VariableMoveTypeAttr, VariableMoveCategoryAttr } from "../data/move";
+import Move, { HighCritAttr, HitsTagAttr, applyMoveAttrs, applyFilteredMoveAttrs, MoveAttr, MoveEffectAttr, FixedDamageAttr, VariableAtkAttr, VariablePowerAttr, allMoves, MoveCategory, TypelessAttr, CritOnlyAttr, getMoveTargets, OneHitKOAttr, MultiHitAttr, StatusMoveTypeImmunityAttr, MoveTarget, VariableDefAttr, AttackMove, ModifiedDamageAttr, VariableMoveTypeMultiplierAttr, IgnoreOpponentStatChangesAttr, SacrificialAttr, VariableMoveTypeAttr, VariableMoveCategoryAttr, MoveEffectTrigger } from "../data/move";
 import { default as PokemonSpecies, PokemonSpeciesForm, SpeciesFormKey, getFusedSpeciesName, getPokemonSpecies, getPokemonSpeciesForm, starterPassiveAbilities } from '../data/pokemon-species';
 import * as Utils from '../utils';
 import { Type, TypeDamageMultiplier, getTypeDamageMultiplier, getTypeRgb } from '../data/type';
@@ -1199,7 +1199,7 @@ export default abstract class Pokemon extends Phaser.GameObjects.Container {
     return (this.isPlayer() ? this.scene.getPlayerField() : this.scene.getEnemyField())[this.getFieldIndex() ? 0 : 1];
   }
 
-  apply(source: Pokemon, battlerMove: PokemonMove): HitResult {
+  apply(source: Pokemon, battlerMove: PokemonMove, firstHit: boolean): HitResult {
     let result: HitResult;
     const move = battlerMove.getMove();
     let damage = new Utils.NumberHolder(0);
@@ -1298,6 +1298,9 @@ export default abstract class Pokemon extends Phaser.GameObjects.Container {
                 isCritical = false;
             }
           }
+          const isTypeImmune = new Utils.BooleanHolder((typeMultiplier.value * arenaAttackTypeMultiplier) === 0);
+          applyFilteredMoveAttrs((attr: MoveAttr) => attr instanceof MoveEffectAttr && (attr as MoveEffectAttr).trigger === MoveEffectTrigger.PRE_DAMAGE && (!attr.firstHitOnly || firstHit), source, this, move, isTypeImmune);
+
           const sourceAtk = new Utils.IntegerHolder(source.getBattleStat(isPhysical ? Stat.ATK : Stat.SPATK, this, null, isCritical));
           const targetDef = new Utils.IntegerHolder(this.getBattleStat(isPhysical ? Stat.DEF : Stat.SPDEF, source, move, isCritical));
           const criticalMultiplier = isCritical ? 1.5 : 1;
@@ -1305,7 +1308,6 @@ export default abstract class Pokemon extends Phaser.GameObjects.Container {
           if (!isCritical) {
             this.scene.arena.applyTagsForSide(WeakenMoveScreenTag, this.isPlayer() ? ArenaTagSide.PLAYER : ArenaTagSide.ENEMY, move.category, this.scene.currentBattle.double, screenMultiplier);
           }
-          const isTypeImmune = (typeMultiplier.value * arenaAttackTypeMultiplier) === 0;
           const sourceTypes = source.getTypes();
           const matchesSourceType = sourceTypes[0] === type || (sourceTypes.length > 1 && sourceTypes[1] === type);
           let stabMultiplier = new Utils.NumberHolder(1);
@@ -1322,7 +1324,7 @@ export default abstract class Pokemon extends Phaser.GameObjects.Container {
           applyMoveAttrs(VariableAtkAttr, source, this, move, sourceAtk);
           applyMoveAttrs(VariableDefAttr, source, this, move, targetDef);
 
-          if (!isTypeImmune) {
+          if (!isTypeImmune.value) {
             damage.value = Math.ceil(((((2 * source.level / 5 + 2) * power.value * sourceAtk.value / targetDef.value) / 50) + 2) * stabMultiplier.value * typeMultiplier.value * arenaAttackTypeMultiplier * screenMultiplier.value * ((this.scene.randBattleSeedInt(15) + 85) / 100) * criticalMultiplier);
             if (isPhysical && source.status && source.status.effect === StatusEffect.BURN) {
               const burnDamageReductionCancelled = new Utils.BooleanHolder(false);
@@ -1341,7 +1343,7 @@ export default abstract class Pokemon extends Phaser.GameObjects.Container {
 
           const fixedDamage = new Utils.IntegerHolder(0);
           applyMoveAttrs(FixedDamageAttr, source, this, move, fixedDamage);
-          if (!isTypeImmune && fixedDamage.value) {
+          if (!isTypeImmune.value && fixedDamage.value) {
             damage.value = fixedDamage.value;
             isCritical = false;
             result = HitResult.EFFECTIVE;

src/phases.ts

@@ -2425,7 +2425,7 @@ export class MoveEffectPhase extends PokemonPhase {
 
           moveHistoryEntry.result = MoveResult.SUCCESS;
           
-          const hitResult = !isProtected ? target.apply(user, this.move) : HitResult.NO_EFFECT;
+          const hitResult = !isProtected ? target.apply(user, this.move, firstHit) : HitResult.NO_EFFECT;
 
           this.scene.triggerPokemonFormChange(user, SpeciesFormChangePostMoveTrigger);
 
@@ -2648,62 +2648,78 @@ export class ShowAbilityPhase extends PokemonPhase {
 export class StatChangePhase extends PokemonPhase {
   private stats: BattleStat[];
   private selfTarget: boolean;
-  private levels: integer;
+  private levels: Utils.IntegerHolder;
   private showMessage: boolean;
   private ignoreAbilities: boolean;
+  private doChangeSynchronously: boolean;
 
-  constructor(scene: BattleScene, battlerIndex: BattlerIndex, selfTarget: boolean, stats: BattleStat[], levels: integer, showMessage: boolean = true, ignoreAbilities: boolean = false) {
+  private relLevels: number[];
+  private filteredStats: BattleStat[];
+
+  /**
+   * @param doChangeSynchronously save the stat changes before the phase gets queued, only tested for use with Moves.SPECTRAL_THIEF
+   */
+  constructor(scene: BattleScene, battlerIndex: BattlerIndex, selfTarget: boolean, stats: BattleStat[], levels: integer, showMessage: boolean = true, ignoreAbilities: boolean = false, doChangeSynchronously: boolean = false) {
     super(scene, battlerIndex);
 
     this.selfTarget = selfTarget;
     this.stats = stats;
-    this.levels = levels;
+    this.levels = new Utils.IntegerHolder(levels);
     this.showMessage = showMessage;
     this.ignoreAbilities = ignoreAbilities;
+    this.doChangeSynchronously = doChangeSynchronously;
+    if (doChangeSynchronously)
+      this.applyChanges()
   }
 
-  start() {
+  applyChanges() {
     const pokemon = this.getPokemon();
 
     if (!pokemon.isActive(true))
       return this.end();
 
     const allStats = Utils.getEnumValues(BattleStat);
-    const filteredStats = this.stats.map(s => s !== BattleStat.RAND ? s : allStats[pokemon.randSeedInt(BattleStat.SPD + 1)]).filter(stat => {
+    this.filteredStats = this.stats.map(s => s !== BattleStat.RAND ? s : allStats[pokemon.randSeedInt(BattleStat.SPD + 1)]).filter(stat => {
       const cancelled = new Utils.BooleanHolder(false);
 
-      if (!this.selfTarget && this.levels < 0)
+      if (!this.selfTarget && this.levels.value < 0)
         this.scene.arena.applyTagsForSide(MistTag, pokemon.isPlayer() ? ArenaTagSide.PLAYER : ArenaTagSide.ENEMY, cancelled);
 
-      if (!cancelled.value && !this.selfTarget && this.levels < 0)
+      if (!cancelled.value && !this.selfTarget && this.levels.value < 0)
         applyPreStatChangeAbAttrs(ProtectStatAbAttr, this.getPokemon(), stat, cancelled);
       
       return !cancelled.value;
     });
 
-    const levels = new Utils.IntegerHolder(this.levels);
-
     if (!this.ignoreAbilities)
-      applyAbAttrs(StatChangeMultiplierAbAttr, pokemon, null, levels);
+      applyAbAttrs(StatChangeMultiplierAbAttr, pokemon, null, this.levels);
 
     const battleStats = this.getPokemon().summonData.battleStats;
-    const relLevels = filteredStats.map(stat => (levels.value >= 1 ? Math.min(battleStats[stat] + levels.value, 6) : Math.max(battleStats[stat] + levels.value, -6)) - battleStats[stat]);
+    this.relLevels = this.filteredStats.map(stat => (this.levels.value >= 1 ? Math.min(battleStats[stat] + this.levels.value, 6) : Math.max(battleStats[stat] + this.levels.value, -6)) - battleStats[stat]);
+
+    for (let stat of this.filteredStats)
+      pokemon.summonData.battleStats[stat] = Math.max(Math.min(pokemon.summonData.battleStats[stat] + this.levels.value, 6), -6);
+      
+  }
+
+  start() {
+    const pokemon = this.getPokemon();
+    const levels = this.levels
+    if(!this.doChangeSynchronously)
+      this.applyChanges();
 
     const end = () => {
       if (this.showMessage) {
-        const messages = this.getStatChangeMessages(filteredStats, levels.value, relLevels);
+        const messages = this.getStatChangeMessages(this.filteredStats, levels.value, this.relLevels);
         for (let message of messages)
           this.scene.queueMessage(message);
       }
 
-      for (let stat of filteredStats)
+      applyPostStatChangeAbAttrs(PostStatChangeAbAttr, pokemon, this.filteredStats, levels.value, this.selfTarget)
-        pokemon.summonData.battleStats[stat] = Math.max(Math.min(pokemon.summonData.battleStats[stat] + levels.value, 6), -6);
-      
-      applyPostStatChangeAbAttrs(PostStatChangeAbAttr, pokemon, filteredStats, this.levels, this.selfTarget)
       this.end();
     };
 
-    if (relLevels.filter(l => l).length && this.scene.moveAnimations) {
+    if (this.relLevels.filter(l => l).length && this.scene.moveAnimations) {
       pokemon.enableMask();
       const pokemonMaskSprite = pokemon.maskSprite;
 
@@ -2712,7 +2728,7 @@ export class StatChangePhase extends PokemonPhase {
       const tileWidth = 156 * this.scene.field.scale * pokemon.getSpriteScale();
       const tileHeight = 316 * this.scene.field.scale * pokemon.getSpriteScale();
 
-      const statSprite = this.scene.add.tileSprite(tileX, tileY, tileWidth, tileHeight, 'battle_stats', filteredStats.length > 1 ? 'mix' : BattleStat[filteredStats[0]].toLowerCase());
+      const statSprite = this.scene.add.tileSprite(tileX, tileY, tileWidth, tileHeight, 'battle_stats', this.filteredStats.length > 1 ? 'mix' : BattleStat[this.filteredStats[0]].toLowerCase());
       statSprite.setPipeline(this.scene.fieldSpritePipeline);
       statSprite.setAlpha(0);
       statSprite.setScale(6);