main, disable the slide switch if the time is missing, stop the alarm if the time is completely backed out.

lib/main.dart

@@ -327,18 +327,26 @@ class _HomeScreenState extends State<HomeScreen> {
     if (value) {
       await _scheduleAlarm();
     } else {
-      _alarmTimer?.cancel();
-      if (!Platform.isLinux) {
-        // Notification Method
-        if (ANDROID_USE_NOTIF) await _notifications.cancel(id: _alarmId);
-
-        // Alarm Method
-        if (ANDROID_USE_ALARM) await Alarm.stop(_alarmId);
-      }
-      _showSnack('Alarm Cancelled');
+      _stopAlarm();
     }
   }
 
+  Future<void> _stopAlarm() async {
+    if (Platform.isLinux) {
+      _alarmTimer?.cancel();
+    } else if (Platform.isAndroid) {
+      // Notification Method
+      if (ANDROID_USE_NOTIF) {
+        await _notifications.cancel(id: _alarmId);
+      }
+      // Alarm Method
+      if (ANDROID_USE_ALARM) {
+        await Alarm.stop(_alarmId);
+      }
+    }
+    _showSnack('Alarm Cancelled');
+  }
+
   void _showSnack(String msg) {
     ScaffoldMessenger.of(context).showSnackBar(SnackBar(content: Text(msg)));
   }
@@ -462,6 +470,9 @@ class _HomeScreenState extends State<HomeScreen> {
                         ),
                       ),
                       onChanged: (v) {
+                        if (v == "") {
+                          _stopAlarm();
+                        }
                         final val = _validateTime(v);
                         if (val == null) {
                           _savePrefs();
@@ -538,10 +549,15 @@ class _HomeScreenState extends State<HomeScreen> {
                       subtitle: Text(
                         _alarmEnabled
                             ? '${_minutesBefore} Minute${_plural} Before @ $_alarmDisplayTime'
-                            : '',
+                            : (_sunsetController.text == ""
+                                ? "Time Missing"
+                                : ""),
                       ),
-                      value: _alarmEnabled,
-                      onChanged: _toggleAlarm,
+                      value:
+                          _sunsetController.text != "" ? _alarmEnabled : false,
+                      // If _isDataLoaded is false, onChanged is null, disabling the switch
+                      onChanged:
+                          _sunsetController.text != "" ? _toggleAlarm : null,
                     ),
                   ),
                 ],