From f75b08d98dd8aaeb0c1288e2c7cd372ee5edaf36 Mon Sep 17 00:00:00 2001
From: beo3000 <pakabu@web.de>
Date: Sun, 28 Dec 2025 21:51:35 +0100
Subject: [PATCH] fix Gutte in Decrease-Mode

---
 .../Components/Game/GameInputPanel.razor        | 10 +++++++++-
 src/Koogle.Web/Store/GameState/GameActions.cs   |  6 ++++++
 src/Koogle.Web/Store/GameState/GameReducers.cs  | 10 ++++++++++
 src/Koogle.Web/Store/GameState/GameState.cs     | 17 +++++++++++++++++
 4 files changed, 42 insertions(+), 1 deletion(-)

diff --git a/src/Koogle.Web/Components/Game/GameInputPanel.razor b/src/Koogle.Web/Components/Game/GameInputPanel.razor
index 9483c08..6dffcc3 100644
--- a/src/Koogle.Web/Components/Game/GameInputPanel.razor
+++ b/src/Koogle.Web/Components/Game/GameInputPanel.razor
@@ -280,7 +280,15 @@
     private async Task HandleGutterClick(bool isLeft)
     {
         // Gutter = 0 pins fallen, auto-confirm throw
-        Dispatcher.Dispatch(new ResetPinsAction());
+        // In Decrease mode, preserve disabled pins (already knocked down)
+        if (GameState.Value.ThrowPanelAfter.ThrowMode == ThrowMode.Decrease)
+        {
+            Dispatcher.Dispatch(new ClearFallenPinsAction());
+        }
+        else
+        {
+            Dispatcher.Dispatch(new ResetPinsAction());
+        }
         _selectedNumber = 0;
 
         await ConfirmThrow(isGutter: true, isLeftGutter: isLeft);
diff --git a/src/Koogle.Web/Store/GameState/GameActions.cs b/src/Koogle.Web/Store/GameState/GameActions.cs
index 5b4e2dc..0e000df 100644
--- a/src/Koogle.Web/Store/GameState/GameActions.cs
+++ b/src/Koogle.Web/Store/GameState/GameActions.cs
@@ -151,6 +151,12 @@ public record SetPinStatusAction(int PinNumber, PinStatus Status);
 /// </summary>
 public record ResetPinsAction;
 
+/// <summary>
+/// Action to clear fallen pins (set to standing) while preserving disabled pins.
+/// Used in Decrease mode for gutter throws.
+/// </summary>
+public record ClearFallenPinsAction;
+
 /// <summary>
 /// Action to set the bell value.
 /// </summary>
diff --git a/src/Koogle.Web/Store/GameState/GameReducers.cs b/src/Koogle.Web/Store/GameState/GameReducers.cs
index b2a35c3..a8134ef 100644
--- a/src/Koogle.Web/Store/GameState/GameReducers.cs
+++ b/src/Koogle.Web/Store/GameState/GameReducers.cs
@@ -309,6 +309,16 @@ public static class GameReducers
             ThrowPanelAfter = state.ThrowPanelAfter.ResetPins()
         };
 
+    /// <summary>
+    /// Handles ClearFallenPinsAction - clears fallen pins while preserving disabled.
+    /// </summary>
+    [ReducerMethod(typeof(ClearFallenPinsAction))]
+    public static GameState OnClearFallenPins(GameState state)
+        => state with
+        {
+            ThrowPanelAfter = state.ThrowPanelAfter.ClearFallenPins()
+        };
+
     /// <summary>
     /// Handles SetBellValueAction - sets bell value.
     /// </summary>
diff --git a/src/Koogle.Web/Store/GameState/GameState.cs b/src/Koogle.Web/Store/GameState/GameState.cs
index 67c25a4..ad2cabd 100644
--- a/src/Koogle.Web/Store/GameState/GameState.cs
+++ b/src/Koogle.Web/Store/GameState/GameState.cs
@@ -297,6 +297,23 @@ public record ThrowPanelState
         Pin9 = Pin9 == PinStatus.Fallen ? PinStatus.Disabled : Pin9
     };
 
+    /// <summary>
+    /// Clears fallen pins (sets to standing) while preserving disabled pins.
+    /// Used for gutter throws in Decrease mode.
+    /// </summary>
+    public ThrowPanelState ClearFallenPins() => this with
+    {
+        Pin1 = Pin1 == PinStatus.Fallen ? PinStatus.Standing : Pin1,
+        Pin2 = Pin2 == PinStatus.Fallen ? PinStatus.Standing : Pin2,
+        Pin3 = Pin3 == PinStatus.Fallen ? PinStatus.Standing : Pin3,
+        Pin4 = Pin4 == PinStatus.Fallen ? PinStatus.Standing : Pin4,
+        Pin5 = Pin5 == PinStatus.Fallen ? PinStatus.Standing : Pin5,
+        Pin6 = Pin6 == PinStatus.Fallen ? PinStatus.Standing : Pin6,
+        Pin7 = Pin7 == PinStatus.Fallen ? PinStatus.Standing : Pin7,
+        Pin8 = Pin8 == PinStatus.Fallen ? PinStatus.Standing : Pin8,
+        Pin9 = Pin9 == PinStatus.Fallen ? PinStatus.Standing : Pin9
+    };
+
     /// <summary>
     /// Checks if all pins are knocked down (fallen or disabled).
     /// </summary>