Alter message to show when the alarm is set for. Try fixing the alarm for Linux.

lib/main.dart

@@ -8,6 +8,8 @@ import 'package:timezone/timezone.dart' as tz;
 import 'package:http/http.dart' as http;
 import 'dart:convert';
 
+import 'dart:io';
+
 void main() async {
   WidgetsFlutterBinding.ensureInitialized();
   tz.initializeTimeZones();
@@ -41,6 +43,7 @@ class _HomeScreenState extends State<HomeScreen> {
   final _latController = TextEditingController();
   final _lngController = TextEditingController();
   final _sunsetController = TextEditingController();
+  final _minutesController = TextEditingController(text: '30');
 
   final FlutterLocalNotificationsPlugin _notifications =
       FlutterLocalNotificationsPlugin();
@@ -59,14 +62,10 @@ class _HomeScreenState extends State<HomeScreen> {
   }
 
   Future<void> _initNotifications() async {
-    const androidInit =
+    const androidInit = AndroidInitializationSettings('@mipmap/ic_launcher');
-        AndroidInitializationSettings('@mipmap/ic_launcher');
+    const iosInit = DarwinInitializationSettings();
-    const linuxInit = DarwinInitializationSettings();
     await _notifications.initialize(
-      const InitializationSettings(
+      const InitializationSettings(android: androidInit, iOS: iosInit),
-        android: androidInit,
-        iOS: linuxInit,
-      ),
     );
   }
 
@@ -81,6 +80,7 @@ class _HomeScreenState extends State<HomeScreen> {
       if (lat != null) _latController.text = lat.toString();
       if (lng != null) _lngController.text = lng.toString();
       if (sunset != null) _sunsetController.text = sunset;
+      _minutesController.text = '$_minutesBefore';
     });
     if (_alarmEnabled && _sunsetController.text.isNotEmpty) {
       _scheduleAlarm();
@@ -148,7 +148,6 @@ class _HomeScreenState extends State<HomeScreen> {
       if (response.statusCode == 200) {
         final data = jsonDecode(response.body);
         final sunsetStr = data['daily']['sunset'][0] as String;
-        // "2026-09-12T19:42" -> "19:42"
         final timePart = sunsetStr.split('T')[1];
         setState(() => _sunsetController.text = timePart);
         await _savePrefs();
@@ -163,6 +162,8 @@ class _HomeScreenState extends State<HomeScreen> {
     }
   }
 
+  Timer? _alarmTimer;
+
   Future<void> _scheduleAlarm() async {
     final sunsetText = _sunsetController.text.trim();
     if (sunsetText.isEmpty) return;
@@ -175,12 +176,9 @@ class _HomeScreenState extends State<HomeScreen> {
     final m = int.parse(parts[1]);
     var alarmTime = DateTime(now.year, now.month, now.day, h, m);
 
-    // If the alarm time has already passed today, schedule for tomorrow
     if (alarmTime.isBefore(now)) {
       alarmTime = alarmTime.add(const Duration(days: 1));
     }
-
-    // Subtract the "minutes before" offset
     alarmTime = alarmTime.subtract(Duration(minutes: _minutesBefore));
 
     if (alarmTime.isBefore(now)) {
@@ -188,8 +186,29 @@ class _HomeScreenState extends State<HomeScreen> {
       alarmTime = alarmTime.add(const Duration(days: 1));
     }
 
+    if (Platform.isLinux) {
+      // Linux: use a Timer (app must stay open)
+      _alarmTimer?.cancel();
+      final delay = alarmTime.difference(now);
+      _alarmTimer = Timer(delay, () {
+        const linuxDetails = LinuxNotificationDetails(
+          urgency: LinuxNotificationUrgency.critical,
+          resident: true,
+          timeout: LinuxNotificationTimeout.expiresNever(),
+        );
+        _notifications.show(
+          _alarmId,
+          'Sunset in ${_minutesBefore} min',
+          'The sun sets at $sunsetText. Time to get ready!',
+          const NotificationDetails(linux: linuxDetails),
+        );
+      });
+      _showSnack(
+        'Alarm set for ${alarmTime.hour.toString().padLeft(2, '0')}:${alarmTime.minute.toString().padLeft(2, '0')} (app must stay open)',
+      );
+    } else {
+      // Android: use zonedSchedule (works in background)
       final tzAlarm = tz.TZDateTime.from(alarmTime, tz.local);
-
       const androidDetails = AndroidNotificationDetails(
         'sunset_alarm',
         'Sunset Alarm',
@@ -199,22 +218,18 @@ class _HomeScreenState extends State<HomeScreen> {
         fullScreenIntent: true,
         category: AndroidNotificationCategory.alarm,
       );
-    const linuxDetails = DarwinNotificationDetails(
-      presentAlert: true,
-      presentBadge: true,
-      presentSound: true,
-    );
-
       await _notifications.zonedSchedule(
         _alarmId,
         'Sunset in ${_minutesBefore} min',
         'The sun sets at $sunsetText. Time to get ready!',
         tzAlarm,
-      NotificationDetails(android: androidDetails, iOS: linuxDetails),
+        const NotificationDetails(android: androidDetails),
         androidScheduleMode: AndroidScheduleMode.alarmClock,
         uiLocalNotificationDateInterpretation:
             UILocalNotificationDateInterpretation.absoluteTime,
       );
+      _showSnack('Alarm scheduled.');
+    }
   }
 
   Future<void> _toggleAlarm(bool value) async {
@@ -222,9 +237,11 @@ class _HomeScreenState extends State<HomeScreen> {
     await _savePrefs();
     if (value) {
       await _scheduleAlarm();
-      _showSnack('Alarm scheduled.');
     } else {
+      _alarmTimer?.cancel();
+      if (!Platform.isLinux) {
         await _notifications.cancel(_alarmId);
+      }
       _showSnack('Alarm cancelled.');
     }
   }
@@ -238,6 +255,7 @@ class _HomeScreenState extends State<HomeScreen> {
     _latController.dispose();
     _lngController.dispose();
     _sunsetController.dispose();
+    _minutesController.dispose();
     super.dispose();
   }
 
@@ -251,16 +269,20 @@ class _HomeScreenState extends State<HomeScreen> {
           crossAxisAlignment: CrossAxisAlignment.start,
           children: [
             // --- Location section ---
-            const Text('Location',
+            const Text(
-                style: TextStyle(fontSize: 18, fontWeight: FontWeight.bold)),
+              'Location',
+              style: TextStyle(fontSize: 18, fontWeight: FontWeight.bold),
+            ),
             const SizedBox(height: 8),
             Row(
               children: [
                 Expanded(
                   child: TextField(
                     controller: _latController,
-                    keyboardType:
+                    keyboardType: const TextInputType.numberWithOptions(
-                        const TextInputType.numberWithOptions(signed: true, decimal: true),
+                      signed: true,
+                      decimal: true,
+                    ),
                     decoration: const InputDecoration(
                       labelText: 'Latitude',
                       border: OutlineInputBorder(),
@@ -272,8 +294,10 @@ class _HomeScreenState extends State<HomeScreen> {
                 Expanded(
                   child: TextField(
                     controller: _lngController,
-                    keyboardType:
+                    keyboardType: const TextInputType.numberWithOptions(
-                        const TextInputType.numberWithOptions(signed: true, decimal: true),
+                      signed: true,
+                      decimal: true,
+                    ),
                     decoration: const InputDecoration(
                       labelText: 'Longitude',
                       border: OutlineInputBorder(),
@@ -292,8 +316,10 @@ class _HomeScreenState extends State<HomeScreen> {
             const SizedBox(height: 16),
 
             // --- Sunset time section ---
-            const Text('Sunset',
+            const Text(
-                style: TextStyle(fontSize: 18, fontWeight: FontWeight.bold)),
+              'Sunset',
+              style: TextStyle(fontSize: 18, fontWeight: FontWeight.bold),
+            ),
             const SizedBox(height: 8),
             Row(
               children: [
@@ -309,7 +335,8 @@ class _HomeScreenState extends State<HomeScreen> {
                 ),
                 const SizedBox(width: 8),
                 IconButton.filledTonal(
-                  icon: _loading
+                  icon:
+                      _loading
                           ? const SizedBox(
                             width: 20,
                             height: 20,
@@ -324,8 +351,10 @@ class _HomeScreenState extends State<HomeScreen> {
             const SizedBox(height: 16),
 
             // --- Minutes before ---
-            const Text('Alert Before Sunset',
+            const Text(
-                style: TextStyle(fontSize: 18, fontWeight: FontWeight.bold)),
+              'Alert Before Sunset',
+              style: TextStyle(fontSize: 18, fontWeight: FontWeight.bold),
+            ),
             const SizedBox(height: 8),
             Row(
               children: [
@@ -333,22 +362,20 @@ class _HomeScreenState extends State<HomeScreen> {
                 SizedBox(
                   width: 80,
                   child: TextField(
-                    controller: TextEditingController(text: '$_minutesBefore'),
+                    controller: _minutesController,
                     keyboardType: TextInputType.number,
-                    decoration:
+                    decoration: const InputDecoration(
-                        const InputDecoration(border: OutlineInputBorder()),
+                      border: OutlineInputBorder(),
-                    onEditingComplete: () async {
+                    ),
-                      final val = int.tryParse(
+                    onChanged: (v) {
-                          (findContextController() as TextEditingController?)?.text ?? '');
+                      final val = int.tryParse(v);
                       if (val != null && val > 0) {
-                        setState(() => _minutesBefore = val);
+                        _minutesBefore = val;
-                        await _savePrefs();
                       }
                     },
                   ),
                 ),
-              ],
+
-            ),
                 const SizedBox(height: 24),
 
                 // --- Toggle ---
@@ -356,7 +383,7 @@ class _HomeScreenState extends State<HomeScreen> {
                   title: const Text('Enable Sunset Alarm'),
                   subtitle: Text(
                     _alarmEnabled
-                    ? 'Will alert ${_minutesBefore} min before sunset'
+                        ? 'Will alert ${_minutesBefore} min before sunset. ($_alarmDisplayTime)'
                         : 'Alarm is off',
                   ),
                   value: _alarmEnabled,
@@ -364,14 +391,24 @@ class _HomeScreenState extends State<HomeScreen> {
                 ),
               ],
             ),
+          ],
+        ),
       ),
     );
   }
 
-  // Helper to avoid recreating TextEditingController on each build
+  String get _alarmDisplayTime {
-  TextEditingController? _minutesController;
+    final sunsetText = _sunsetController.text.trim();
-  TextEditingController? findContextController() {
+    if (sunsetText.isEmpty) return '—';
-    _minutesController ??= TextEditingController(text: '$_minutesBefore');
+    final parts = sunsetText.split(':');
-    return _minutesController;
+    if (parts.length < 2) return '—';
+    final h = int.tryParse(parts[0]);
+    final m = int.tryParse(parts[1]);
+    if (h == null || m == null) return '—';
+    final alarmMinutes = h * 60 + m - _minutesBefore;
+    final displayMin = alarmMinutes % (24 * 60);
+    final dh = (displayMin ~/ 60) % 24;
+    final dm = displayMin % 60;
+    return '${dh.toString().padLeft(2, '0')}:${dm.toString().padLeft(2, '0')}';
   }
 }