From cd075a3559400eaa0abf54e04f7206fc03591da6 Mon Sep 17 00:00:00 2001
From: Clansty <i@gao4.pw>
Date: Sat, 16 Nov 2024 01:47:07 +0800
Subject: [PATCH] [F] RatingUpWhenSSSp Algo

---
 AquaMai/Utils/SelectionDetail.cs | 15 +++++++++++----
 1 file changed, 11 insertions(+), 4 deletions(-)

diff --git a/AquaMai/Utils/SelectionDetail.cs b/AquaMai/Utils/SelectionDetail.cs
index 86677a0b..1f1187af 100644
--- a/AquaMai/Utils/SelectionDetail.cs
+++ b/AquaMai/Utils/SelectionDetail.cs
@@ -113,12 +113,19 @@ public class SelectionDetail
 
         private uint CalcB50(MusicData musicData, int difficulty)
         {
-            var newRate = new UserRate(musicData.name.id, difficulty, 1010000, (uint)musicData.version);
-            var userLowRate = (newRate.OldFlag ? userData.RatingList.RatingList : userData.RatingList.NewRatingList).Last();
+            var theory = new UserRate(musicData.name.id, difficulty, 1010000, (uint)musicData.version);
+            var list = theory.OldFlag ? userData.RatingList.RatingList : userData.RatingList.NewRatingList;
+            var userLowRate = list.Last();
+            var userSongRate = list.FirstOrDefault(it => it.MusicId == musicData.name.id && it.Level == difficulty);
 
-            if (newRate.SingleRate > userLowRate.SingleRate)
+            if (!userSongRate.Equals(default(UserRate)))
             {
-                return newRate.SingleRate - userLowRate.SingleRate;
+                return theory.SingleRate - userSongRate.SingleRate;
+            }
+
+            if (theory.SingleRate > userLowRate.SingleRate)
+            {
+                return theory.SingleRate - userLowRate.SingleRate;
             }
 
             return 0;