---
phase: 04-notifications
plan: 01
type: execute
wave: 1
depends_on: []
files_modified:
  - pubspec.yaml
  - android/app/build.gradle.kts
  - android/app/src/main/AndroidManifest.xml
  - lib/main.dart
  - lib/core/notifications/notification_service.dart
  - lib/core/notifications/notification_settings_notifier.dart
  - lib/core/notifications/notification_settings_notifier.g.dart
  - lib/features/home/data/daily_plan_dao.dart
  - lib/features/home/data/daily_plan_dao.g.dart
  - lib/l10n/app_de.arb
  - test/core/notifications/notification_service_test.dart
  - test/core/notifications/notification_settings_notifier_test.dart
autonomous: true
requirements:
  - NOTF-01
  - NOTF-02

must_haves:
  truths:
    - "NotificationService can schedule a daily notification at a given TimeOfDay"
    - "NotificationService can cancel all scheduled notifications"
    - "NotificationService can request POST_NOTIFICATIONS permission"
    - "NotificationSettingsNotifier persists enabled boolean and TimeOfDay to SharedPreferences"
    - "NotificationSettingsNotifier loads persisted values on build"
    - "DailyPlanDao can return a one-shot count of overdue + today tasks"
    - "Timezone is initialized before any notification scheduling"
    - "Android build compiles with core library desugaring enabled"
    - "AndroidManifest has POST_NOTIFICATIONS permission, RECEIVE_BOOT_COMPLETED permission, and boot receiver"
  artifacts:
    - path: "lib/core/notifications/notification_service.dart"
      provides: "Singleton wrapper around FlutterLocalNotificationsPlugin"
      exports: ["NotificationService"]
    - path: "lib/core/notifications/notification_settings_notifier.dart"
      provides: "Riverpod notifier for notification enabled + time"
      exports: ["NotificationSettings", "NotificationSettingsNotifier"]
    - path: "test/core/notifications/notification_service_test.dart"
      provides: "Unit tests for scheduling, cancel, permission"
    - path: "test/core/notifications/notification_settings_notifier_test.dart"
      provides: "Unit tests for persistence and state management"
  key_links:
    - from: "lib/core/notifications/notification_service.dart"
      to: "flutter_local_notifications"
      via: "FlutterLocalNotificationsPlugin"
      pattern: "FlutterLocalNotificationsPlugin"
    - from: "lib/core/notifications/notification_settings_notifier.dart"
      to: "shared_preferences"
      via: "SharedPreferences persistence"
      pattern: "SharedPreferences\\.getInstance"
    - from: "lib/main.dart"
      to: "lib/core/notifications/notification_service.dart"
      via: "timezone init + service initialize"
      pattern: "NotificationService.*initialize"
---

<objective>
Install notification packages, configure Android build system, create the NotificationService singleton and NotificationSettingsNotifier provider, add one-shot DAO query for task counts, initialize timezone in main.dart, add ARB strings, and write unit tests.

Purpose: Establish the complete notification infrastructure so Plan 02 can wire it into the Settings UI.
Output: Working notification service and settings notifier with full test coverage. Android build configuration complete.
</objective>

<execution_context>
@/home/jlmak/.claude/get-shit-done/workflows/execute-plan.md
@/home/jlmak/.claude/get-shit-done/templates/summary.md
</execution_context>

<context>
@.planning/PROJECT.md
@.planning/ROADMAP.md
@.planning/STATE.md
@.planning/phases/04-notifications/04-CONTEXT.md
@.planning/phases/04-notifications/04-RESEARCH.md

<interfaces>
<!-- Key types and contracts the executor needs. Extracted from codebase. -->

From lib/core/theme/theme_provider.dart (pattern to follow for notifier):
```dart
@riverpod
class ThemeNotifier extends _$ThemeNotifier {
  @override
  ThemeMode build() {
    _loadPersistedThemeMode();
    return ThemeMode.system; // sync default, then async load overrides
  }
  Future<void> setThemeMode(ThemeMode mode) async { ... }
}
```

From lib/features/home/data/daily_plan_dao.dart (DAO to extend):
```dart
@DriftAccessor(tables: [Tasks, Rooms, TaskCompletions])
class DailyPlanDao extends DatabaseAccessor<AppDatabase> with _$DailyPlanDaoMixin {
  DailyPlanDao(super.attachedDatabase);
  Stream<List<TaskWithRoom>> watchAllTasksWithRoomName() { ... }
  Stream<int> watchCompletionsToday({DateTime? today}) { ... }
}
```

From lib/main.dart (entry point to modify):
```dart
void main() {
  WidgetsFlutterBinding.ensureInitialized();
  runApp(const ProviderScope(child: App()));
}
```

From lib/core/router/router.dart (top-level GoRouter for notification tap):
```dart
final router = GoRouter(
  initialLocation: '/',
  routes: [ StatefulShellRoute.indexedStack(...) ],
);
```

From lib/l10n/app_de.arb (localization file, 92 existing keys):
Last key: "dailyPlanNoTasks": "Noch keine Aufgaben angelegt"

From android/app/build.gradle.kts:
```kotlin
android {
    compileSdk = flutter.compileSdkVersion
    compileOptions {
        sourceCompatibility = JavaVersion.VERSION_17
        targetCompatibility = JavaVersion.VERSION_17
    }
}
```

From android/app/src/main/AndroidManifest.xml:
No notification-related entries exist yet. Only standard Flutter activity + meta-data.
</interfaces>
</context>

<tasks>

<task type="auto">
  <name>Task 1: Android config, packages, NotificationService, timezone init, DAO query, ARB strings</name>
  <files>
    pubspec.yaml,
    android/app/build.gradle.kts,
    android/app/src/main/AndroidManifest.xml,
    lib/main.dart,
    lib/core/notifications/notification_service.dart,
    lib/features/home/data/daily_plan_dao.dart,
    lib/features/home/data/daily_plan_dao.g.dart,
    lib/l10n/app_de.arb
  </files>
  <action>
    1. **Add packages** to pubspec.yaml dependencies:
       - `flutter_local_notifications: ^21.0.0`
       - `timezone: ^0.9.4`
       - `flutter_timezone: ^1.0.8`
       Run `flutter pub get`.

    2. **Configure Android build** in `android/app/build.gradle.kts`:
       - Set `compileSdk = 35` (explicit, replacing `flutter.compileSdkVersion`)
       - Add `isCoreLibraryDesugaringEnabled = true` inside `compileOptions`
       - Add `coreLibraryDesugaring("com.android.tools:desugar_jdk_libs:2.1.4")` in `dependencies` block

    3. **Configure AndroidManifest.xml** — add inside `<manifest>` (outside `<application>`):
       - `<uses-permission android:name="android.permission.POST_NOTIFICATIONS"/>`
       - `<uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED"/>`
       Add inside `<application>`:
       - `ScheduledNotificationReceiver` with `android:exported="false"`
       - `ScheduledNotificationBootReceiver` with `android:exported="true"` and intent-filter for BOOT_COMPLETED, MY_PACKAGE_REPLACED, QUICKBOOT_POWERON, HTC QUICKBOOT_POWERON
       Use the exact XML from RESEARCH.md Pattern section.

    4. **Create NotificationService** at `lib/core/notifications/notification_service.dart`:
       - Singleton pattern (factory constructor + static `_instance`)
       - `final _plugin = FlutterLocalNotificationsPlugin();`
       - `Future<void> initialize()`: AndroidInitializationSettings with `@mipmap/ic_launcher`, call `_plugin.initialize(settings, onDidReceiveNotificationResponse: _onTap)`
       - `Future<bool> requestPermission()`: resolve Android implementation, call `requestNotificationsPermission()`, return `granted ?? false`
       - `Future<void> scheduleDailyNotification({required TimeOfDay time, required String title, required String body})`:
         - Call `_plugin.cancelAll()` first
         - Compute `_nextInstanceOf(time)` as TZDateTime
         - AndroidNotificationDetails: channelId `'daily_summary'`, channelName `'Tagliche Zusammenfassung'`, channelDescription `'Tagliche Aufgaben-Erinnerung'`, importance default, priority default
         - Call `_plugin.zonedSchedule(0, title: title, body: body, scheduledDate: scheduledDate, details, androidScheduleMode: AndroidScheduleMode.inexactAllowWhileIdle, matchDateTimeComponents: DateTimeComponents.time)`
       - `Future<void> cancelAll()`: delegates to `_plugin.cancelAll()`
       - `tz.TZDateTime _nextInstanceOf(TimeOfDay time)`: compute next occurrence (today if in future, tomorrow otherwise)
       - `static void _onTap(NotificationResponse response)`: no-op for now (Plan 02 wires navigation)

    5. **Add one-shot DAO query** to `lib/features/home/data/daily_plan_dao.dart`:
       ```dart
       /// One-shot count of overdue + today tasks (for notification body).
       Future<int> getOverdueAndTodayTaskCount({DateTime? today}) async {
         final now = today ?? DateTime.now();
         final endOfToday = DateTime(now.year, now.month, now.day + 1);
         final result = await (selectOnly(tasks)
           ..addColumns([tasks.id.count()])
           ..where(tasks.nextDueDate.isSmallerThanValue(endOfToday)))
         .getSingle();
         return result.read(tasks.id.count()) ?? 0;
       }

       /// One-shot count of overdue tasks only (for notification body split).
       Future<int> getOverdueTaskCount({DateTime? today}) async {
         final now = today ?? DateTime.now();
         final startOfToday = DateTime(now.year, now.month, now.day);
         final result = await (selectOnly(tasks)
           ..addColumns([tasks.id.count()])
           ..where(tasks.nextDueDate.isSmallerThanValue(startOfToday)))
         .getSingle();
         return result.read(tasks.id.count()) ?? 0;
       }
       ```
       Run `dart run build_runner build --delete-conflicting-outputs` to regenerate DAO.

    6. **Initialize timezone in main.dart** — before `NotificationService().initialize()`:
       ```dart
       import 'package:timezone/data/latest_all.dart' as tz;
       import 'package:timezone/timezone.dart' as tz;
       import 'package:flutter_timezone/flutter_timezone.dart';

       void main() async {
         WidgetsFlutterBinding.ensureInitialized();
         tz.initializeTimeZones();
         final timeZoneName = await FlutterTimezone.getLocalTimezone();
         tz.setLocalLocation(tz.getLocation(timeZoneName));
         await NotificationService().initialize();
         runApp(const ProviderScope(child: App()));
       }
       ```

    7. **Add ARB strings** to `lib/l10n/app_de.arb`:
       - `settingsSectionNotifications`: "Benachrichtigungen"
       - `notificationsEnabledLabel`: "Tägliche Erinnerung"
       - `notificationsTimeLabel`: "Uhrzeit"
       - `notificationsPermissionDeniedHint`: "Benachrichtigungen sind in den Systemeinstellungen deaktiviert. Tippe hier, um sie zu aktivieren."
       - `notificationTitle`: "Dein Tagesplan"
       - `notificationBody`: "{count} Aufgaben fällig" with `@notificationBody` placeholder `count: int`
       - `notificationBodyWithOverdue`: "{count} Aufgaben fällig ({overdue} überfällig)" with `@notificationBodyWithOverdue` placeholders `count: int, overdue: int`

    8. Run `flutter pub get` and `flutter test` to confirm no regressions (expect 72 existing tests to pass).
  </action>
  <verify>
    <automated>cd /home/jlmak/Projects/jlmak/HouseHoldKeaper && flutter test</automated>
  </verify>
  <done>
    - flutter_local_notifications, timezone, flutter_timezone in pubspec.yaml
    - build.gradle.kts has compileSdk=35, desugaring enabled, desugar_jdk_libs dependency
    - AndroidManifest has POST_NOTIFICATIONS, RECEIVE_BOOT_COMPLETED, both receivers
    - NotificationService exists with initialize, requestPermission, scheduleDailyNotification, cancelAll
    - DailyPlanDao has getOverdueAndTodayTaskCount and getOverdueTaskCount one-shot queries
    - main.dart initializes timezone and notification service before runApp
    - ARB file has 7 new notification-related keys
    - All 72 existing tests still pass
  </done>
</task>

<task type="auto" tdd="true">
  <name>Task 2: NotificationSettingsNotifier and unit tests</name>
  <files>
    lib/core/notifications/notification_settings_notifier.dart,
    lib/core/notifications/notification_settings_notifier.g.dart,
    test/core/notifications/notification_settings_notifier_test.dart,
    test/core/notifications/notification_service_test.dart
  </files>
  <behavior>
    - Test: NotificationSettingsNotifier build() returns default state (enabled=false, time=07:00)
    - Test: setEnabled(true) updates state.enabled to true and persists to SharedPreferences
    - Test: setEnabled(false) updates state.enabled to false and persists to SharedPreferences
    - Test: setTime(TimeOfDay(hour: 9, minute: 30)) updates state.time and persists hour+minute to SharedPreferences
    - Test: After _load() with existing prefs (enabled=true, hour=8, minute=15), state reflects persisted values
    - Test: NotificationService._nextInstanceOf returns today if time is in the future
    - Test: NotificationService._nextInstanceOf returns tomorrow if time has passed
  </behavior>
  <action>
    1. **Create NotificationSettingsNotifier** at `lib/core/notifications/notification_settings_notifier.dart`:
       - Use `@Riverpod(keepAlive: true)` annotation (NOT plain `@riverpod`) to survive tab switches
       - `class NotificationSettings { final bool enabled; final TimeOfDay time; const NotificationSettings({required this.enabled, required this.time}); }`
       - `class NotificationSettingsNotifier extends _$NotificationSettingsNotifier`
       - `build()` returns `NotificationSettings(enabled: false, time: TimeOfDay(hour: 7, minute: 0))` synchronously, then calls `_load()` which async reads SharedPreferences and updates state
       - `Future<void> setEnabled(bool enabled)`: update state, persist `notifications_enabled` bool
       - `Future<void> setTime(TimeOfDay time)`: update state, persist `notifications_hour` int and `notifications_minute` int
       - Follow exact pattern from ThemeNotifier: sync return default, async load overrides state
       - Add `part 'notification_settings_notifier.g.dart';`

    2. Run `dart run build_runner build --delete-conflicting-outputs` to generate `.g.dart`.

    3. **Write tests** at `test/core/notifications/notification_settings_notifier_test.dart`:
       - Use `SharedPreferences.setMockInitialValues({})` for clean state
       - Use `SharedPreferences.setMockInitialValues({'notifications_enabled': true, 'notifications_hour': 8, 'notifications_minute': 15})` for pre-existing state
       - Create a `ProviderContainer` with the notifier, verify default state, call `setEnabled`/`setTime`, verify state updates and SharedPreferences values

    4. **Write tests** at `test/core/notifications/notification_service_test.dart`:
       - Test `_nextInstanceOf` logic by extracting it to a `@visibleForTesting` static method or by testing `scheduleDailyNotification` with a mock plugin
       - Since `FlutterLocalNotificationsPlugin` dispatches to native and cannot be truly unit-tested, focus tests on:
         a. `_nextInstanceOf` returns correct TZDateTime (make it a package-private or `@visibleForTesting` method)
         b. Verify the service can be instantiated (singleton pattern)
       - Initialize timezone in test setUp: `tz.initializeTimeZones(); tz.setLocalLocation(tz.getLocation('Europe/Berlin'));`

    5. Run `flutter test test/core/notifications/` to confirm new tests pass.
    6. Run `flutter test` to confirm all tests pass (72 existing + new).
  </action>
  <verify>
    <automated>cd /home/jlmak/Projects/jlmak/HouseHoldKeaper && flutter test test/core/notifications/</automated>
  </verify>
  <done>
    - NotificationSettingsNotifier with @Riverpod(keepAlive: true) created and generated
    - NotificationSettings data class with enabled + time fields
    - SharedPreferences persistence for enabled, hour, minute
    - Unit tests for default state, setEnabled, setTime, persistence load
    - Unit tests for _nextInstanceOf timezone logic
    - All tests pass including existing 72
  </done>
</task>

</tasks>

<verification>
- `flutter test` — all tests pass (72 existing + new notification tests)
- `dart analyze --fatal-infos` — no warnings or errors
- `grep -r "flutter_local_notifications" pubspec.yaml` — package present
- `grep -r "isCoreLibraryDesugaringEnabled" android/app/build.gradle.kts` — desugaring enabled
- `grep -r "POST_NOTIFICATIONS" android/app/src/main/AndroidManifest.xml` — permission present
- `grep -r "RECEIVE_BOOT_COMPLETED" android/app/src/main/AndroidManifest.xml` — permission present
- `grep -r "ScheduledNotificationBootReceiver" android/app/src/main/AndroidManifest.xml` — receiver present
</verification>

<success_criteria>
- NotificationService singleton with initialize, requestPermission, scheduleDailyNotification, cancelAll
- NotificationSettingsNotifier persists enabled + time to SharedPreferences
- DailyPlanDao has one-shot overdue+today count queries
- Android build configured for flutter_local_notifications v21
- Timezone initialized in main.dart
- All tests pass, dart analyze clean
</success_criteria>

<output>
After completion, create `.planning/phases/04-notifications/04-01-SUMMARY.md`
</output>