smal button enable for domin match

lib/pages/login.dart

@@ -59,6 +59,8 @@ class _loginState extends State<login> {
   int? _resendToken;
   bool _isLoading = false;
   bool _isLoadingSAML = false;
+  bool _isSsoButtonEnabled = false;
+  List<String> _samlDomains = [];
   bool isEmailFieldVisible = false;
   bool _obscurePassword = true;
   bool _resetObscurePassword = true;
@@ -100,10 +102,17 @@ class _loginState extends State<login> {
     decoration: TextDecoration.underline,
   );
 
+  static const String _appSignature =
+      'nhance-2025-signature-T8f6gV9k5fK2wf5V5c4vId3b0J8z6cAm2x8Y';
+
   @override
   void initState() {
     super.initState();
     countryController.text = "+91";
+    emailMobileController.addListener(_updateSsoButtonEnabledState);
+    WidgetsBinding.instance.addPostFrameCallback((_) {
+      _fetchSamlDomainsList();
+    });
     _privacyPolicyTap.onTap = () {
       if (mounted) context.go('/privacypolicy');
     };
@@ -171,11 +180,71 @@ class _loginState extends State<login> {
 
   @override
   void dispose() {
+    emailMobileController.removeListener(_updateSsoButtonEnabledState);
     _privacyPolicyTap.dispose();
     _termsOfUseTap.dispose();
     super.dispose();
   }
 
+  Future<void> _fetchSamlDomainsList() async {
+    try {
+      final response = await http.get(
+        Uri.parse('${Environment.apiUrlEnrollment}getSamlDomainsList'),
+        headers: {'APP-SIGNATURE': _appSignature},
+      );
+      if (!mounted) return;
+      if (response.statusCode != 200) {
+        logDebug('getSamlDomainsList failed: ${response.statusCode}');
+        return;
+      }
+      final body = json.decode(response.body);
+      if (body is! Map<String, dynamic>) return;
+      if (body['status']?.toString() != 'success') {
+        logDebug('getSamlDomainsList: ${body['message']}');
+        return;
+      }
+      final domains = _parseSamlDomainsFromResponse(body);
+      if (!mounted) return;
+      setState(() {
+        _samlDomains = domains;
+      });
+      _updateSsoButtonEnabledState();
+    } catch (e) {
+      logDebug('getSamlDomainsList error: $e');
+    }
+  }
+
+  /// API: `{ "data": ["travelspends.com", "azurevenbainfotech.onmicrosoft.com"] }`
+  List<String> _parseSamlDomainsFromResponse(Map<String, dynamic> body) {
+    final data = body['data'];
+    if (data is! List) return [];
+    return data
+        .whereType<String>()
+        .map((d) => d.trim().toLowerCase())
+        .where((d) => d.isNotEmpty)
+        .toList();
+  }
+
+  String? _emailDomainFromInput(String input) {
+    final trimmed = input.trim();
+    if (!_isValidEmailForSso(trimmed)) return null;
+    return trimmed.split('@').last.toLowerCase();
+  }
+
+  bool _emailDomainMatchesSamlList(String input) {
+    final domain = _emailDomainFromInput(input);
+    if (domain == null || _samlDomains.isEmpty) return false;
+    return _samlDomains.contains(domain);
+  }
+
+  void _updateSsoButtonEnabledState() {
+    final enabled =
+        _emailDomainMatchesSamlList(emailMobileController.text);
+    if (enabled == _isSsoButtonEnabled) return;
+    if (!mounted) return;
+    setState(() => _isSsoButtonEnabled = enabled);
+  }
+
   void validatePassword(String password) {
     setState(() {
       hasMinLength = password.length >= 8;
@@ -1817,18 +1886,27 @@ class _loginState extends State<login> {
                                                   width: double.infinity,
                                                   height: 45,
                                                   child: ElevatedButton(
-                                                    onPressed: _handleSsoLoginButtonTap,
+                                                    onPressed: _isSsoButtonEnabled &&
+                                                            !_isLoadingSAML
+                                                        ? _handleSsoLoginButtonTap
+                                                        : null,
                                                     style: ElevatedButton.styleFrom(
                                                       backgroundColor: Colors.white,
                                                       foregroundColor: Colors.black,
+                                                      disabledBackgroundColor:
+                                                          const Color(0xFFF5F5F5),
+                                                      disabledForegroundColor:
+                                                          Colors.black38,
                                                       padding: const EdgeInsets.symmetric(
                                                         horizontal: 24,
                                                         vertical: 5,
                                                       ),
                                                       shape: RoundedRectangleBorder(
                                                         borderRadius: BorderRadius.circular(18),
-                                                        side: const BorderSide(
-                                                          color: Colors.black,
+                                                        side: BorderSide(
+                                                          color: _isSsoButtonEnabled
+                                                              ? Colors.black
+                                                              : Colors.black26,
                                                           width: 0.5,
                                                         ),
                                                       ),