fix: no screen stacking when making calls

dialer/lib/services/call_service.dart

@@ -1,4 +1,3 @@
-import 'dart:typed_data';
 import 'package:flutter/material.dart';
 import 'package:flutter/services.dart';
 import '../features/call/call_page.dart';
@@ -11,6 +10,7 @@ class CallService {
   static String? currentDisplayName;
   static Uint8List? currentThumbnail;
   static bool _isCallPageVisible = false;
+  static String? _currentCallState;
   final ContactService _contactService = ContactService();
 
   static final GlobalKey<NavigatorState> navigatorKey = GlobalKey<NavigatorState>();
@@ -31,22 +31,12 @@ class CallService {
           currentPhoneNumber = phoneNumber.replaceFirst('tel:', '');
           await _fetchContactInfo(currentPhoneNumber!);
           print('CallService: Call added, number: $currentPhoneNumber, state: $state');
-          if (state == "ringing") {
+          _handleCallState(context, state);
-            _navigateToIncomingCallPage(context);
-          } else {
-            _navigateToCallPage(context);
-          }
           break;
         case "callStateChanged":
           final state = call.arguments["state"] as String;
           print('CallService: State changed to $state');
-          if (state == "disconnected" || state == "disconnecting") {
+          _handleCallState(context, state);
-            _closeCallPage(context);
-          } else if (state == "active" || state == "dialing") {
-            _navigateToCallPage(context);
-          } else if (state == "ringing") {
-            _navigateToIncomingCallPage(context);
-          }
           break;
         case "callEnded":
         case "callRemoved":
@@ -55,6 +45,7 @@ class CallService {
           currentPhoneNumber = null;
           currentDisplayName = null;
           currentThumbnail = null;
+          _currentCallState = null;
           break;
       }
     });
@@ -73,7 +64,6 @@ class CallService {
           }
         }
       }
-      // If no match found, use phone number as fallback
       currentDisplayName = phoneNumber;
       currentThumbnail = null;
     } catch (e) {
@@ -87,12 +77,33 @@ class CallService {
     return number.replaceAll(RegExp(r'[\s\-\(\)]'), '');
   }
 
+  void _handleCallState(BuildContext context, String state) {
+    if (_currentCallState == state) {
+      print('CallService: State $state already handled, skipping');
+      return;
+    }
+    _currentCallState = state;
+
+    if (state == "disconnected" || state == "disconnecting") {
+      _closeCallPage(context);
+    } else if (state == "active" || state == "dialing") {
+      _navigateToCallPage(context);
+    } else if (state == "ringing") {
+      _navigateToIncomingCallPage(context);
+    }
+  }
+
   void _navigateToCallPage(BuildContext context) {
-    if (_isCallPageVisible && ModalRoute.of(context)?.settings.name == '/call') {
+    final currentRoute = ModalRoute.of(context)?.settings.name;
+    print('CallService: Navigating to CallPage. Visible: $_isCallPageVisible, Current Route: $currentRoute');
+    if (_isCallPageVisible && currentRoute == '/call') {
       print('CallService: CallPage already visible, skipping navigation');
       return;
     }
-    print('CallService: Navigating to CallPage');
+    if (_isCallPageVisible && currentRoute == '/incoming_call') {
+      print('CallService: Replacing IncomingCallPage with CallPage');
+      Navigator.pop(context);
+    }
     Navigator.pushReplacement(
       context,
       MaterialPageRoute(
@@ -104,17 +115,23 @@ class CallService {
         ),
       ),
     ).then((_) {
+      print('CallService: CallPage popped');
       _isCallPageVisible = false;
     });
     _isCallPageVisible = true;
   }
 
   void _navigateToIncomingCallPage(BuildContext context) {
-    if (_isCallPageVisible && ModalRoute.of(context)?.settings.name == '/incoming_call') {
+    final currentRoute = ModalRoute.of(context)?.settings.name;
+    print('CallService: Navigating to IncomingCallPage. Visible: $_isCallPageVisible, Current Route: $currentRoute');
+    if (_isCallPageVisible && currentRoute == '/incoming_call') {
       print('CallService: IncomingCallPage already visible, skipping navigation');
       return;
     }
-    print('CallService: Navigating to IncomingCallPage');
+    if (_isCallPageVisible && currentRoute == '/call') {
+      print('CallService: CallPage visible, not showing IncomingCallPage');
+      return;
+    }
     Navigator.push(
       context,
       MaterialPageRoute(
@@ -126,20 +143,24 @@ class CallService {
         ),
       ),
     ).then((_) {
+      print('CallService: IncomingCallPage popped');
       _isCallPageVisible = false;
     });
     _isCallPageVisible = true;
   }
 
   void _closeCallPage(BuildContext context) {
+    print('CallService: Attempting to close call page. Visible: $_isCallPageVisible');
     if (!_isCallPageVisible) {
       print('CallService: CallPage not visible, skipping pop');
       return;
     }
     if (Navigator.canPop(context)) {
-      print('CallService: Popping CallPage');
+      print('CallService: Popping CallPage. Current Route: ${ModalRoute.of(context)?.settings.name}');
       Navigator.pop(context);
       _isCallPageVisible = false;
+    } else {
+      print('CallService: Cannot pop, no routes to pop');
     }
   }
 
@@ -151,7 +172,6 @@ class CallService {
   }) async {
     try {
       currentPhoneNumber = phoneNumber;
-      // Use provided displayName and thumbnail if available, otherwise fetch
       currentDisplayName = displayName ?? phoneNumber;
       currentThumbnail = thumbnail;
       if (displayName == null || thumbnail == null) {
@@ -166,7 +186,7 @@ class CallService {
         );
         return;
       }
-      _navigateToCallPage(context);
+      _handleCallState(context, "dialing");
     } catch (e) {
       print("CallService: Error making call: $e");
       ScaffoldMessenger.of(context).showSnackBar(
@@ -185,6 +205,8 @@ class CallService {
         ScaffoldMessenger.of(context).showSnackBar(
           SnackBar(content: Text("Failed to end call")),
         );
+      } else {
+        _closeCallPage(context);
       }
     } catch (e) {
       print("CallService: Error hanging up call: $e");