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 =
-        AndroidInitializationSettings('@mipmap/ic_launcher');
-    const linuxInit = DarwinInitializationSettings();
+    const androidInit = AndroidInitializationSettings('@mipmap/ic_launcher');
+    const iosInit = DarwinInitializationSettings();
     await _notifications.initialize(
-      const InitializationSettings(
-        android: androidInit,
-        iOS: linuxInit,
-      ),
+      const InitializationSettings(android: androidInit, iOS: iosInit),
     );
   }
 
@@ -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)) {
@@ -188,33 +186,50 @@ class _HomeScreenState extends State<HomeScreen> {
       alarmTime = alarmTime.add(const Duration(days: 1));
     }
 
-    final tzAlarm = tz.TZDateTime.from(alarmTime, tz.local);
-
-    const androidDetails = AndroidNotificationDetails(
-      'sunset_alarm',
-      'Sunset Alarm',
-      channelDescription: 'Alarm X minutes before sunset',
-      importance: Importance.max,
-      priority: Priority.high,
-      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),
-      androidScheduleMode: AndroidScheduleMode.alarmClock,
-      uiLocalNotificationDateInterpretation:
-          UILocalNotificationDateInterpretation.absoluteTime,
-    );
+    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',
+        channelDescription: 'Alarm X minutes before sunset',
+        importance: Importance.max,
+        priority: Priority.high,
+        fullScreenIntent: true,
+        category: AndroidNotificationCategory.alarm,
+      );
+      await _notifications.zonedSchedule(
+        _alarmId,
+        'Sunset in ${_minutesBefore} min',
+        'The sun sets at $sunsetText. Time to get ready!',
+        tzAlarm,
+        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 {
-      await _notifications.cancel(_alarmId);
+      _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',
-                style: TextStyle(fontSize: 18, fontWeight: FontWeight.bold)),
+            const Text(
+              'Location',
+              style: TextStyle(fontSize: 18, fontWeight: FontWeight.bold),
+            ),
             const SizedBox(height: 8),
             Row(
               children: [
                 Expanded(
                   child: TextField(
                     controller: _latController,
-                    keyboardType:
-                        const TextInputType.numberWithOptions(signed: true, decimal: true),
+                    keyboardType: const TextInputType.numberWithOptions(
+                      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:
-                        const TextInputType.numberWithOptions(signed: true, decimal: true),
+                    keyboardType: const TextInputType.numberWithOptions(
+                      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',
-                style: TextStyle(fontSize: 18, fontWeight: FontWeight.bold)),
+            const Text(
+              'Sunset',
+              style: TextStyle(fontSize: 18, fontWeight: FontWeight.bold),
+            ),
             const SizedBox(height: 8),
             Row(
               children: [
@@ -309,13 +335,14 @@ class _HomeScreenState extends State<HomeScreen> {
                 ),
                 const SizedBox(width: 8),
                 IconButton.filledTonal(
-                  icon: _loading
-                      ? const SizedBox(
-                          width: 20,
-                          height: 20,
-                          child: CircularProgressIndicator(strokeWidth: 2),
-                        )
-                      : const Icon(Icons.cloud_done_outlined),
+                  icon:
+                      _loading
+                          ? const SizedBox(
+                            width: 20,
+                            height: 20,
+                            child: CircularProgressIndicator(strokeWidth: 2),
+                          )
+                          : const Icon(Icons.cloud_done_outlined),
                   tooltip: 'Fetch sunset from Open-Meteo',
                   onPressed: _loading ? null : _fetchSunset,
                 ),
@@ -324,8 +351,10 @@ class _HomeScreenState extends State<HomeScreen> {
             const SizedBox(height: 16),
 
             // --- Minutes before ---
-            const Text('Alert Before Sunset',
-                style: TextStyle(fontSize: 18, fontWeight: FontWeight.bold)),
+            const Text(
+              'Alert Before Sunset',
+              style: TextStyle(fontSize: 18, fontWeight: FontWeight.bold),
+            ),
             const SizedBox(height: 8),
             Row(
               children: [
@@ -333,34 +362,34 @@ class _HomeScreenState extends State<HomeScreen> {
                 SizedBox(
                   width: 80,
                   child: TextField(
-                    controller: TextEditingController(text: '$_minutesBefore'),
+                    controller: _minutesController,
                     keyboardType: TextInputType.number,
-                    decoration:
-                        const InputDecoration(border: OutlineInputBorder()),
-                    onEditingComplete: () async {
-                      final val = int.tryParse(
-                          (findContextController() as TextEditingController?)?.text ?? '');
+                    decoration: const InputDecoration(
+                      border: OutlineInputBorder(),
+                    ),
+                    onChanged: (v) {
+                      final val = int.tryParse(v);
                       if (val != null && val > 0) {
-                        setState(() => _minutesBefore = val);
-                        await _savePrefs();
+                        _minutesBefore = val;
                       }
                     },
                   ),
                 ),
-              ],
-            ),
-            const SizedBox(height: 24),
 
-            // --- Toggle ---
-            SwitchListTile(
-              title: const Text('Enable Sunset Alarm'),
-              subtitle: Text(
-                _alarmEnabled
-                    ? 'Will alert ${_minutesBefore} min before sunset'
-                    : 'Alarm is off',
-              ),
-              value: _alarmEnabled,
-              onChanged: _toggleAlarm,
+                const SizedBox(height: 24),
+
+                // --- Toggle ---
+                SwitchListTile(
+                  title: const Text('Enable Sunset Alarm'),
+                  subtitle: Text(
+                    _alarmEnabled
+                        ? 'Will alert ${_minutesBefore} min before sunset. ($_alarmDisplayTime)'
+                        : 'Alarm is off',
+                  ),
+                  value: _alarmEnabled,
+                  onChanged: _toggleAlarm,
+                ),
+              ],
             ),
           ],
         ),
@@ -368,10 +397,18 @@ class _HomeScreenState extends State<HomeScreen> {
     );
   }
 
-  // Helper to avoid recreating TextEditingController on each build
-  TextEditingController? _minutesController;
-  TextEditingController? findContextController() {
-    _minutesController ??= TextEditingController(text: '$_minutesBefore');
-    return _minutesController;
+  String get _alarmDisplayTime {
+    final sunsetText = _sunsetController.text.trim();
+    if (sunsetText.isEmpty) return '—';
+    final parts = sunsetText.split(':');
+    if (parts.length < 2) return '—';
+    final h = int.tryParse(parts[0]);
+    final m = int.tryParse(parts[1]);
+    if (h == null || m == null) return '—';
+    final alarmMinutes = h * 60 + m - _minutesBefore;
+    final displayMin = alarmMinutes % (24 * 60);
+    final dh = (displayMin ~/ 60) % 24;
+    final dm = displayMin % 60;
+    return '${dh.toString().padLeft(2, '0')}:${dm.toString().padLeft(2, '0')}';
   }
-}   
+}