From 60a1f0ab80d7e02145da84a72158047fd3960e6b Mon Sep 17 00:00:00 2001
From: user1823 <92206575+user1823@users.noreply.github.com>
Date: Fri, 15 Aug 2025 11:22:23 +0530
Subject: [PATCH] Make simulator fill missing values of DR and decay too

If a card has missing memory states, it will likely have missing DR and decay too. So, it makes sense to simultaneously update them as well.
---
 rslib/src/scheduler/fsrs/simulator.rs | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/rslib/src/scheduler/fsrs/simulator.rs b/rslib/src/scheduler/fsrs/simulator.rs
index a26afda9c..50c84ebd6 100644
--- a/rslib/src/scheduler/fsrs/simulator.rs
+++ b/rslib/src/scheduler/fsrs/simulator.rs
@@ -143,8 +143,10 @@ impl Collection {
         for c in &mut cards {
             if is_included_card(c) && c.memory_state.is_none() {
                 let original = c.clone();
-                let new_state = self.compute_memory_state(c.id)?.state;
-                c.memory_state = new_state.map(Into::into);
+                let fsrs_data = self.compute_memory_state(c.id)?;
+                c.memory_state = fsrs_data.state.map(Into::into);
+                c.desired_retention = fsrs_data.desired_retention;
+                c.decay = fsrs_data.decay;
                 self.update_card_inner(c, original, self.usn()?)?;
             }
         }