adds retry functionality

lib/services/simple_notification_service.dart

@@ -1,12 +1,14 @@
+import 'dart:convert';
+
 import 'package:flutter_local_notifications/flutter_local_notifications.dart';
 import 'package:supplements/logging.dart';
+import 'package:supplements/services/notification_debug_store.dart';
+import 'package:supplements/services/notification_router.dart';
 import 'package:timezone/data/latest.dart' as tzdata;
 import 'package:timezone/timezone.dart' as tz;
-import 'dart:convert';
-import 'package:supplements/services/notification_router.dart';
-import 'package:supplements/services/notification_debug_store.dart';
 
 import '../models/supplement.dart';
+import '../providers/settings_provider.dart';
 
 /// A minimal notification scheduler focused purely on:
 /// - Initialization
@@ -131,8 +133,12 @@ class SimpleNotificationService {
   ///
   /// IDs:
   /// - Group ID per time slot: 40000 + hour*60 + minute.
+  /// - Retry IDs: 50000 + (hour*60 + minute)*100 + retryIndex.
   /// - Stable and predictable for cancel/update operations.
-  Future<void> scheduleDailyGroupedReminders(List<Supplement> supplements) async {
+  Future<void> scheduleDailyGroupedReminders(
+    List<Supplement> supplements, {
+    SettingsProvider? settingsProvider,
+  }) async {
     if (!_initialized) {
       await initialize();
     }
@@ -281,6 +287,20 @@ class SimpleNotificationService {
       );
 
       printLog('✅ Scheduled group $timeKey with ID $id');
+
+      // Schedule retry notifications if enabled
+      if (settingsProvider != null && settingsProvider.notificationRetryEnabled) {
+        await _scheduleRetryNotifications(
+          timeKey: timeKey,
+          supplements: items,
+          isSingle: isSingle,
+          title: title,
+          body: body,
+          payloadStr: payloadStr,
+          retryCount: settingsProvider.notificationRetryCount,
+          retryDelayMinutes: settingsProvider.notificationRetryDelayMinutes,
+        );
+      }
     }
 
     // Log what the system reports as pending
@@ -297,13 +317,16 @@ class SimpleNotificationService {
 
   /// Convenience to schedule grouped reminders for today and tomorrow.
   ///
-  /// For iOS’s 64 limit, we stick to one day for recurring (matchDateTimeComponents)
+  /// For iOS's 64 limit, we stick to one day for recurring (matchDateTimeComponents)
   /// which already repeats every day without needing to schedule future dates.
-  /// If you want an extra safety net, you could schedule tomorrow’s one-offs,
+  /// If you want an extra safety net, you could schedule tomorrow's one-offs,
   /// but with daily components this is unnecessary and risks hitting iOS limits.
-  Future<void> scheduleDailyGroupedRemindersSafe(List<Supplement> supplements) async {
-    // For now, just schedule today’s recurring groups.
-    await scheduleDailyGroupedReminders(supplements);
+  Future<void> scheduleDailyGroupedRemindersSafe(
+    List<Supplement> supplements, {
+    SettingsProvider? settingsProvider,
+  }) async {
+    // For now, just schedule today's recurring groups.
+    await scheduleDailyGroupedReminders(supplements, settingsProvider: settingsProvider);
   }
 
   /// Cancel all scheduled reminders for a given [supplementId].
@@ -565,4 +588,176 @@ class SimpleNotificationService {
     }
     return list;
   }
+
+  /// Schedule retry notifications for a specific time group.
+  Future<void> _scheduleRetryNotifications({
+    required String timeKey,
+    required List<Supplement> supplements,
+    required bool isSingle,
+    required String title,
+    required String body,
+    required String payloadStr,
+    required int retryCount,
+    required int retryDelayMinutes,
+  }) async {
+    if (retryCount <= 0) return;
+
+    final parts = timeKey.split(':');
+    final hour = int.parse(parts[0]);
+    final minute = int.parse(parts[1]);
+    final baseTime = _nextInstanceOfTime(hour, minute);
+
+    for (int retryIndex = 1; retryIndex <= retryCount; retryIndex++) {
+      final retryDelay = Duration(minutes: retryDelayMinutes * retryIndex);
+      final retryTime = baseTime.add(retryDelay);
+      final retryId = 50000 + ((hour * 60) + minute) * 100 + retryIndex;
+
+      // Parse and modify payload to mark as retry
+      Map<String, dynamic> retryPayload;
+      try {
+        retryPayload = Map<String, dynamic>.from(jsonDecode(payloadStr));
+        retryPayload['meta'] = {
+          'kind': 'retry',
+          'originalTime': timeKey,
+          'retryIndex': retryIndex,
+          'retryOf': 40000 + (hour * 60) + minute,
+        };
+      } catch (e) {
+        retryPayload = {
+          'type': isSingle ? 'single' : 'group',
+          if (isSingle) 'id': supplements.first.id else 'time': timeKey,
+          'meta': {
+            'kind': 'retry',
+            'originalTime': timeKey,
+            'retryIndex': retryIndex,
+            'retryOf': 40000 + (hour * 60) + minute,
+          },
+        };
+      }
+
+      final retryPayloadStr = jsonEncode(retryPayload);
+      final retryTitle = 'Reminder: $title';
+
+      final androidDetails = AndroidNotificationDetails(
+        _channelDailyId,
+        _channelDailyName,
+        channelDescription: _channelDailyDescription,
+        importance: Importance.high,
+        priority: Priority.high,
+        styleInformation: BigTextStyleInformation(
+          body,
+          contentTitle: retryTitle,
+          htmlFormatContentTitle: false,
+        ),
+        actions: [
+          if (isSingle)
+            AndroidNotificationAction(
+              'take_single',
+              'Take',
+              showsUserInterface: true,
+              cancelNotification: true,
+            )
+          else
+            AndroidNotificationAction(
+              'take_group',
+              'Take All',
+              showsUserInterface: true,
+              cancelNotification: true,
+            ),
+          if (isSingle)
+            AndroidNotificationAction(
+              'snooze_single',
+              'Snooze',
+              showsUserInterface: false,
+            )
+          else
+            AndroidNotificationAction(
+              'snooze_group',
+              'Snooze',
+              showsUserInterface: false,
+            ),
+        ],
+      );
+
+      final iosDetails = DarwinNotificationDetails(
+        categoryIdentifier: isSingle ? 'single' : 'group',
+      );
+
+      await _plugin.zonedSchedule(
+        retryId,
+        retryTitle,
+        isSingle ? body : 'Tap to see details',
+        retryTime,
+        NotificationDetails(
+          android: androidDetails,
+          iOS: iosDetails,
+        ),
+        androidScheduleMode: AndroidScheduleMode.inexactAllowWhileIdle,
+        payload: retryPayloadStr,
+      );
+
+      // Log to debug store
+      final createdAtMs = DateTime.now().millisecondsSinceEpoch;
+      await NotificationDebugStore.instance.add(
+        NotificationLogEntry(
+          id: retryId,
+          kind: 'retry',
+          type: isSingle ? 'single' : 'group',
+          whenEpochMs: retryTime.millisecondsSinceEpoch,
+          createdAtEpochMs: createdAtMs,
+          title: retryTitle,
+          payload: retryPayloadStr,
+          singleId: isSingle ? supplements.first.id : null,
+          timeKey: isSingle ? null : timeKey,
+        ),
+      );
+
+      printLog('🔄 Scheduled retry $retryIndex/$retryCount for $timeKey (ID: $retryId) at $retryTime');
+    }
+  }
+
+  /// Cancel retry notifications for a specific time slot.
+  /// This should be called when a user responds to a notification.
+  Future<void> cancelRetryNotificationsForTimeSlot(String timeKey) async {
+    if (!_initialized) {
+      await initialize();
+    }
+
+    final parts = timeKey.split(':');
+    if (parts.length != 2) return;
+
+    final hour = int.tryParse(parts[0]);
+    final minute = int.tryParse(parts[1]);
+    if (hour == null || minute == null) return;
+
+    // Calculate base retry ID range for this time slot
+    final baseRetryId = 50000 + ((hour * 60) + minute) * 100;
+
+    // Cancel up to 10 possible retries (generous upper bound)
+    for (int retryIndex = 1; retryIndex <= 10; retryIndex++) {
+      final retryId = baseRetryId + retryIndex;
+      await _plugin.cancel(retryId);
+      printLog('🚫 Cancelled retry notification ID: $retryId for time slot $timeKey');
+    }
+  }
+
+  /// Cancel retry notifications for a specific supplement ID.
+  /// This iterates through all possible time slots.
+  Future<void> cancelRetryNotificationsForSupplement(int supplementId) async {
+    if (!_initialized) {
+      await initialize();
+    }
+
+    // Cancel retries for all possible time slots (24 hours * 60 minutes)
+    for (int hour = 0; hour < 24; hour++) {
+      for (int minute = 0; minute < 60; minute += 5) { // Assume 5-minute intervals
+        final baseRetryId = 50000 + ((hour * 60) + minute) * 100;
+        for (int retryIndex = 1; retryIndex <= 10; retryIndex++) {
+          final retryId = baseRetryId + retryIndex;
+          await _plugin.cancel(retryId);
+        }
+      }
+    }
+    printLog('🚫 Cancelled all retry notifications for supplement ID: $supplementId');
+  }
 }