[Balance] [Mystery] Salesman ME offers mons from event encounter pool (#5674)

* Initial event commit

* Salesman odds

* Clean up imports

* globalScene shiny rate getter, fix reroll, remove placeholder event

* Rerolling shiny also tries rerolling for better variant

* Shiny reroll affects 'trainer' mons too

---------

Co-authored-by: damocleas <damocleas25@gmail.com>
Co-authored-by: Sirz Benjie <142067137+SirzBenjie@users.noreply.github.com>

src/data/mystery-encounters/encounters/the-pokemon-salesman-encounter.ts

@@ -3,7 +3,7 @@ import {
   transitionMysteryEncounterIntroVisuals,
   updatePlayerMoney,
 } from "#app/data/mystery-encounters/utils/encounter-phase-utils";
-import { isNullOrUndefined, randSeedInt } from "#app/utils/common";
+import { isNullOrUndefined, NumberHolder, randSeedInt, randSeedItem } from "#app/utils/common";
 import { MysteryEncounterType } from "#enums/mystery-encounter-type";
 import { globalScene } from "#app/global-scene";
 import type MysteryEncounter from "#app/data/mystery-encounters/mystery-encounter";
@@ -28,7 +28,8 @@ import { MysteryEncounterTier } from "#enums/mystery-encounter-tier";
 import { MysteryEncounterOptionMode } from "#enums/mystery-encounter-option-mode";
 import { CLASSIC_MODE_MYSTERY_ENCOUNTER_WAVES } from "#app/game-mode";
 import { Abilities } from "#enums/abilities";
-import { NON_LEGEND_PARADOX_POKEMON } from "#app/data/balance/special-species-groups";
+import { NON_LEGEND_PARADOX_POKEMON, NON_LEGEND_ULTRA_BEASTS } from "#app/data/balance/special-species-groups";
+import { timedEventManager } from "#app/global-event-manager";
 
 /** the i18n namespace for this encounter */
 const namespace = "mysteryEncounters/thePokemonSalesman";
@@ -38,6 +39,9 @@ const MAX_POKEMON_PRICE_MULTIPLIER = 4;
 /** Odds of shiny magikarp will be 1/value */
 const SHINY_MAGIKARP_WEIGHT = 100;
 
+/** Odds of event sale will be value/100 */
+const EVENT_THRESHOLD = 50;
+
 /**
  * Pokemon Salesman encounter.
  * @see {@link https://github.com/pagefaultgames/pokerogue/issues/3799 | GitHub Issue #3799}
@@ -82,15 +86,46 @@ export const ThePokemonSalesmanEncounter: MysteryEncounter = MysteryEncounterBui
       tries++;
     }
 
+    const r = randSeedInt(SHINY_MAGIKARP_WEIGHT);
+
+    const validEventEncounters = timedEventManager
+      .getEventEncounters()
+      .filter(
+        s =>
+          !getPokemonSpecies(s.species).legendary &&
+          !getPokemonSpecies(s.species).subLegendary &&
+          !getPokemonSpecies(s.species).mythical &&
+          !NON_LEGEND_PARADOX_POKEMON.includes(s.species) &&
+          !NON_LEGEND_ULTRA_BEASTS.includes(s.species),
+      );
+
     let pokemon: PlayerPokemon;
+    /**
+     * Mon is determined as follows:
+     * If you roll the 1% for Shiny Magikarp, you get Magikarp with a random variant
+     * If an event with more than 1 valid event encounter species is active, you have 20% chance to get one of those
+     * If the rolled species has no HA, and there are valid event encounters, you will get one of those
+     * If the rolled species has no HA and there are no valid event encounters, you will get Shiny Magikarp
+     * Mons rolled from the event encounter pool get 2 extra shiny rolls
+     */
     if (
-      randSeedInt(SHINY_MAGIKARP_WEIGHT) === 0 ||
+      r === 0 ||
-      isNullOrUndefined(species.abilityHidden) ||
+      ((isNullOrUndefined(species.abilityHidden) || species.abilityHidden === Abilities.NONE) &&
-      species.abilityHidden === Abilities.NONE
+        (validEventEncounters.length === 0))
     ) {
-      // If no HA mon found or you roll 1%, give shiny Magikarp with random variant
+      // If you roll 1%, give shiny Magikarp with random variant
       species = getPokemonSpecies(Species.MAGIKARP);
-      pokemon = new PlayerPokemon(species, 5, 2, species.formIndex, undefined, true);
+      pokemon = new PlayerPokemon(species, 5, 2, undefined, undefined, true);
+    } else if (
+      (validEventEncounters.length > 0 && (r <= EVENT_THRESHOLD ||
+      (isNullOrUndefined(species.abilityHidden) || species.abilityHidden === Abilities.NONE)))
+    ) {
+      // If you roll 20%, give event encounter with 2 extra shiny rolls and its HA, if it has one
+      const enc = randSeedItem(validEventEncounters);
+      species = getPokemonSpecies(enc.species);
+      pokemon = new PlayerPokemon(species, 5, species.abilityHidden === Abilities.NONE ? undefined : 2, enc.formIndex);
+      pokemon.trySetShinySeed();
+      pokemon.trySetShinySeed();
     } else {
       pokemon = new PlayerPokemon(species, 5, 2, species.formIndex);
     }

src/data/mystery-encounters/utils/encounter-phase-utils.ts

@@ -1075,8 +1075,8 @@ export function getRandomEncounterSpecies(level: number, isBoss = false, rerollH
     ret.formIndex = formIndex;
   }
 
-  //Reroll shiny for event encounters
+  //Reroll shiny or variant for event encounters
-  if (isEventEncounter && !ret.shiny) {
+  if (isEventEncounter) {
     ret.trySetShinySeed();
   }
   //Reroll hidden ability

src/field/pokemon.ts

@@ -3170,7 +3170,7 @@ export default abstract class Pokemon extends Phaser.GameObjects.Container {
   /**
    * Function that tries to set a Pokemon shiny based on seed.
    * For manual use only, usually to roll a Pokemon's shiny chance a second time.
-   * If it rolls shiny, also sets a random variant and give the Pokemon the associated luck.
+   * If it rolls shiny, or if it's already shiny, also sets a random variant and give the Pokemon the associated luck.
    *
    * The base shiny odds are {@linkcode BASE_SHINY_CHANCE} / `65536`
    * @param thresholdOverride number that is divided by `2^16` (`65536`) to get the shiny chance, overrides {@linkcode shinyThreshold} if set (bypassing shiny rate modifiers such as Shiny Charm)
@@ -3181,6 +3181,7 @@ export default abstract class Pokemon extends Phaser.GameObjects.Container {
     thresholdOverride?: number,
     applyModifiersToOverride?: boolean,
   ): boolean {
+    if (!this.shiny) {
       const shinyThreshold = new NumberHolder(BASE_SHINY_CHANCE);
       if (thresholdOverride === undefined || applyModifiersToOverride) {
         if (thresholdOverride !== undefined && applyModifiersToOverride) {
@@ -3189,21 +3190,22 @@ export default abstract class Pokemon extends Phaser.GameObjects.Container {
         if (timedEventManager.isEventActive()) {
           shinyThreshold.value *= timedEventManager.getShinyMultiplier();
         }
-      if (!this.hasTrainer()) {
         globalScene.applyModifiers(
           ShinyRateBoosterModifier,
           true,
           shinyThreshold,
         );
       }
-    } else {
+      else {
         shinyThreshold.value = thresholdOverride;
       }
 
       this.shiny = randSeedInt(65536) < shinyThreshold.value;
+    }
 
     if (this.shiny) {
-      this.variant = this.generateShinyVariant();
+      this.variant = this.variant ?? 0;
+      this.variant = Math.max(this.generateShinyVariant(), this.variant) as Variant; // Don't set a variant lower than the current one
       this.luck =
         this.variant + 1 + (this.fusionShiny ? this.fusionVariant + 1 : 0);
       this.initShinySparkle();