From da8b99b78b5475c76e6490e6c2bb4c0a472e6e54 Mon Sep 17 00:00:00 2001
From: ggurdin <ggurdin@gmail.com>
Date: Tue, 20 Jan 2026 15:02:03 -0500
Subject: [PATCH] fix: show error message when not enough data for practice

---
 .../analytics_practice_session_repo.dart                   | 6 ++++++
 lib/pangea/analytics_practice/analytics_practice_view.dart | 7 ++++++-
 2 files changed, 12 insertions(+), 1 deletion(-)

diff --git a/lib/pangea/analytics_practice/analytics_practice_session_repo.dart b/lib/pangea/analytics_practice/analytics_practice_session_repo.dart
index 378dc4486..d50407c1b 100644
--- a/lib/pangea/analytics_practice/analytics_practice_session_repo.dart
+++ b/lib/pangea/analytics_practice/analytics_practice_session_repo.dart
@@ -15,6 +15,8 @@ import 'package:fluffychat/pangea/practice_activities/message_activity_request.d
 import 'package:fluffychat/pangea/practice_activities/practice_target.dart';
 import 'package:fluffychat/widgets/matrix.dart';
 
+class InsufficientDataException implements Exception {}
+
 class AnalyticsPracticeSessionRepo {
   static Future<AnalyticsPracticeSessionModel> get(
     ConstructTypeEnum type,
@@ -67,6 +69,10 @@ class AnalyticsPracticeSessionRepo {
       }
     }
 
+    if (targets.isEmpty) {
+      throw InsufficientDataException();
+    }
+
     final session = AnalyticsPracticeSessionModel(
       userL1: MatrixState.pangeaController.userController.userL1!.langCode,
       userL2: MatrixState.pangeaController.userController.userL2!.langCode,
diff --git a/lib/pangea/analytics_practice/analytics_practice_view.dart b/lib/pangea/analytics_practice/analytics_practice_view.dart
index 6cbef9eae..e5e57404b 100644
--- a/lib/pangea/analytics_practice/analytics_practice_view.dart
+++ b/lib/pangea/analytics_practice/analytics_practice_view.dart
@@ -5,6 +5,7 @@ import 'package:fluffychat/l10n/l10n.dart';
 import 'package:fluffychat/pangea/analytics_misc/construct_type_enum.dart';
 import 'package:fluffychat/pangea/analytics_practice/analytics_practice_page.dart';
 import 'package:fluffychat/pangea/analytics_practice/analytics_practice_session_model.dart';
+import 'package:fluffychat/pangea/analytics_practice/analytics_practice_session_repo.dart';
 import 'package:fluffychat/pangea/analytics_practice/choice_cards/audio_choice_card.dart';
 import 'package:fluffychat/pangea/analytics_practice/choice_cards/game_choice_card.dart';
 import 'package:fluffychat/pangea/analytics_practice/choice_cards/grammar_choice_card.dart';
@@ -84,7 +85,11 @@ class AnalyticsPracticeView extends StatelessWidget {
             builder: (context, state, __) {
               return switch (state) {
                 AsyncError<AnalyticsPracticeSessionModel>(:final error) =>
-                  ErrorIndicator(message: error.toString()),
+                  ErrorIndicator(
+                    message: error is InsufficientDataException
+                        ? L10n.of(context).notEnoughToPractice
+                        : error.toString(),
+                  ),
                 AsyncLoaded<AnalyticsPracticeSessionModel>(:final value) =>
                   value.isComplete
                       ? CompletedActivitySessionView(state.value, controller)