SMS integrated with new ui

lib/features/auth/screens/verification_screen.dart

@@ -0,0 +1,166 @@
+import 'dart:async';
+import 'package:flutter/material.dart';
+import 'package:kmobile/api/services/auth_service.dart';
+import 'package:kmobile/di/injection.dart';
+import 'package:kmobile/features/auth/screens/sms_verification_helper.dart';
+
+class VerificationScreen extends StatefulWidget {
+  final String customerNo;
+  final String password;
+
+  const VerificationScreen({
+    super.key,
+    required this.customerNo,
+    required this.password,
+  });
+
+  @override
+  State<VerificationScreen> createState() => _VerificationScreenState();
+}
+
+class _VerificationScreenState extends State<VerificationScreen> {
+  String _statusMessage = "Starting verification...";
+  Timer? _timer;
+  int _countdown = 120;
+  bool _isVerifying = false;
+  bool _verificationFailed = false;
+
+  @override
+  void initState() {
+    super.initState();
+    _startVerificationProcess();
+  }
+
+  @override
+  void dispose() {
+    _timer?.cancel();
+    super.dispose();
+  }
+
+  void _startTimer() {
+    _timer?.cancel(); // Cancel any existing timer
+    _countdown = 120;
+    _timer = Timer.periodic(const Duration(seconds: 1), (timer) {
+      if (_countdown > 0) {
+        setState(() {
+          _countdown--;
+        });
+      } else {
+        _timer?.cancel();
+        if (mounted) {
+          setState(() {
+            _statusMessage = "Verification timed out. Please try again.";
+            _isVerifying = false;
+            _verificationFailed = true;
+          });
+        }
+      }
+    });
+  }
+
+  Future<void> _startVerificationProcess() async {
+    setState(() {
+      _isVerifying = true;
+      _verificationFailed = false;
+      _statusMessage = "Starting verification...";
+    });
+    _startTimer();
+
+    // 1. Send SMS
+    setState(() {
+      _statusMessage = "SMS sending...";
+    });
+    final smsHelper = SmsVerificationHelper();
+    final uuid = await smsHelper.initiateSmsSequence(context: context);
+
+    if (uuid != null && mounted) {
+      // SMS sending was successful, now wait before verifying.
+      setState(() {
+        _statusMessage = "SMS sent. Waiting for network delivery...";
+      });
+      
+      // Adding a 10-second delay to account for SMS network latency.
+      await Future.delayed(const Duration(seconds: 10));
+
+      if (!mounted) return;
+
+      // 2. Verify SIM
+      setState(() {
+        _statusMessage = "Verifying with server...";
+      });
+
+      final authService = getIt<AuthService>();
+      try {
+        await authService.simVerify(uuid, widget.customerNo);
+
+        setState(() {
+          _statusMessage = "Verification successful!";
+          _isVerifying = false;
+        });
+        _timer?.cancel();
+
+        // Pop with success result
+        Navigator.of(context).pop(true);
+
+      } catch (e) {
+        setState(() {
+          _statusMessage = " $e SIM verification failed. Please try again.";
+          _isVerifying = false;
+          _verificationFailed = true;
+        });
+      }
+    } else if (mounted) {
+      setState(() {
+        _statusMessage = "SMS sending failed. Please check permissions and try again.";
+        _isVerifying = false;
+        _verificationFailed = true;
+      });
+    }
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    return Scaffold(
+      appBar: AppBar(
+        title: const Text("Device Verification"),
+        automaticallyImplyLeading: !_isVerifying,
+      ),
+      body: Center(
+        child: Padding(
+          padding: const EdgeInsets.all(24.0),
+          child: Column(
+            mainAxisAlignment: MainAxisAlignment.center,
+            children: [
+              if (_isVerifying)
+                const CircularProgressIndicator(),
+              if (!_isVerifying && _verificationFailed)
+                const Icon(Icons.error_outline, color: Colors.red, size: 50),
+              if (!_isVerifying && !_verificationFailed)
+                 const Icon(Icons.check_circle_outline, color: Colors.green, size: 50),
+
+              const SizedBox(height: 32),
+              Text(
+                _statusMessage,
+                textAlign: TextAlign.center,
+                style: const TextStyle(fontSize: 18),
+              ),
+              const SizedBox(height: 16),
+              if (_isVerifying)
+                Text(
+                  "Time remaining: $_countdown seconds",
+                  style: const TextStyle(fontSize: 16, color: Colors.grey),
+                ),
+              if (_verificationFailed && !_isVerifying) ...[
+                const SizedBox(height: 20),
+                ElevatedButton(
+                  onPressed: _startVerificationProcess,
+                  child: const Text('Retry'),
+                ),
+              ]
+            ],
+          ),
+        ),
+      ),
+    );
+  }
+}