From 82c479434eaa2a7116a51225b129f359b9c5a806 Mon Sep 17 00:00:00 2001
From: Paul Schneider <paul@pschneider.fr>
Date: Sun, 6 Sep 2026 17:19:21 +0100
Subject: [PATCH] postit: debounce rdv reverse geocoding

---
 .../PostIt/ViewModels/Commands/RdvViewModel.cs   | 16 ++++++++++++++++
 .../PostIt/Views/Commands/RdvPage.axaml.cs       | 12 +++++++++++-
 2 files changed, 27 insertions(+), 1 deletion(-)

diff --git a/src/PostIt/PostIt/ViewModels/Commands/RdvViewModel.cs b/src/PostIt/PostIt/ViewModels/Commands/RdvViewModel.cs
index 8a4ae6cfb..9de2c0989 100644
--- a/src/PostIt/PostIt/ViewModels/Commands/RdvViewModel.cs
+++ b/src/PostIt/PostIt/ViewModels/Commands/RdvViewModel.cs
@@ -133,6 +133,22 @@ public partial class RdvViewModel : BillingCommandPageViewModel
         this.SetInfoStatus("Position sélectionnée sur la carte.");
     }
 
+    public void NotifyReverseGeocodingStarted()
+    {
+        this.SetInfoStatus(string.IsNullOrWhiteSpace(Address)
+            ? "Recherche de l'adresse depuis la carte..."
+            : "Recherche d'une adresse suggérée..."
+        );
+    }
+
+    public void NotifyReverseGeocodingUnavailable()
+    {
+        if (HasSuggestedAddress || !string.IsNullOrWhiteSpace(Address))
+            return;
+
+        this.SetInfoStatus("Position sélectionnée sur la carte. Complétez l'adresse puis envoyez la commande.");
+    }
+
     public void ApplyResolvedAddress(string address)
     {
         if (string.IsNullOrWhiteSpace(address))
diff --git a/src/PostIt/PostIt/Views/Commands/RdvPage.axaml.cs b/src/PostIt/PostIt/Views/Commands/RdvPage.axaml.cs
index 7952d7dc4..2a99c1158 100644
--- a/src/PostIt/PostIt/Views/Commands/RdvPage.axaml.cs
+++ b/src/PostIt/PostIt/Views/Commands/RdvPage.axaml.cs
@@ -22,6 +22,7 @@ public partial class RdvPage : ContentPage
     private const double DefaultLongitude = 2.3522;
     private const int DefaultZoomLevel = 4;
     private const int SelectedZoomLevel = 13;
+    private static readonly TimeSpan ReverseGeocodingDebounce = TimeSpan.FromMilliseconds(350);
 
     private MapControl? _locationMap;
     private MemoryLayer? _selectionLayer;
@@ -182,15 +183,24 @@ public partial class RdvPage : ContentPage
         _reverseGeocodeCts?.Cancel();
         _reverseGeocodeCts?.Dispose();
         _reverseGeocodeCts = new CancellationTokenSource();
+        var cancellationToken = _reverseGeocodeCts.Token;
 
         try
         {
+            vm.NotifyReverseGeocodingStarted();
+            await Task.Delay(ReverseGeocodingDebounce, cancellationToken).ConfigureAwait(true);
+
             var resolved = await _reverseGeocodingService
-                .TryResolveAddressAsync(latitude, longitude, _reverseGeocodeCts.Token)
+                .TryResolveAddressAsync(latitude, longitude, cancellationToken)
                 .ConfigureAwait(true);
 
             if (!string.IsNullOrWhiteSpace(resolved))
+            {
                 vm.ApplyResolvedAddress(resolved);
+                return;
+            }
+
+            vm.NotifyReverseGeocodingUnavailable();
         }
         catch (OperationCanceledException)
         {