From 3e5ef3e3fb6dcae654fb455c35a2289144c852a1 Mon Sep 17 00:00:00 2001
From: flx-sta <50131232+flx-sta@users.noreply.github.com>
Date: Mon, 24 Jun 2024 21:15:11 -0700
Subject: [PATCH] [Bug] add playerfiled length check for score determination
 (#2583)

---
 src/field/trainer.ts | 20 ++++++++++++--------
 1 file changed, 12 insertions(+), 8 deletions(-)

diff --git a/src/field/trainer.ts b/src/field/trainer.ts
index d49a3478791..3e78afeae83 100644
--- a/src/field/trainer.ts
+++ b/src/field/trainer.ts
@@ -436,16 +436,20 @@ export default class Trainer extends Phaser.GameObjects.Container {
     const partyMemberScores = nonFaintedLegalPartyMembers.map(p => {
       const playerField = this.scene.getPlayerField().filter(p => p.isAllowedInBattle());
       let score = 0;
-      for (const playerPokemon of playerField) {
-        score += p.getMatchupScore(playerPokemon);
-        if (playerPokemon.species.legendary) {
-          score /= 2;
+
+      if (playerField.length > 0) {
+        for (const playerPokemon of playerField) {
+          score += p.getMatchupScore(playerPokemon);
+          if (playerPokemon.species.legendary) {
+            score /= 2;
+          }
+        }
+        score /= playerField.length;
+        if (forSwitch && !p.isOnField()) {
+          this.scene.arena.findTagsOnSide(t => t instanceof ArenaTrapTag, ArenaTagSide.ENEMY).map(t => score *= (t as ArenaTrapTag).getMatchupScoreMultiplier(p));
         }
       }
-      score /= playerField.length;
-      if (forSwitch && !p.isOnField()) {
-        this.scene.arena.findTagsOnSide(t => t instanceof ArenaTrapTag, ArenaTagSide.ENEMY).map(t => score *= (t as ArenaTrapTag).getMatchupScoreMultiplier(p));
-      }
+
       return [party.indexOf(p), score];
     }) as [integer, integer][];