feat: debug

lib/app/services/singbox_imp/kr_sing_box_imp.dart

@@ -609,6 +609,8 @@ class KRSingBoxImp {
 
   /// 订阅分组数据流
   void _kr_subscribeToGroups() {
+    KRLogUtil.kr_i('🛰 启动分组监听 watchActiveGroups / watchGroups', tag: 'SingBox');
+
     // 取消之前的分组订阅
     for (var sub in _kr_subscriptions) {
       if (sub.hashCode.toString().contains('Groups')) {
@@ -1423,6 +1425,87 @@ class KRSingBoxImp {
     }
   }
 
+  /// 🌍 国家级节点选择
+  /// 如果传入 'auto'，则调用原有 kr_selectOutbound('auto')
+  /// 否则根据国家名筛选该国节点，自动选择延迟最低的节点
+  Future<void> kr_selectCountry(String country) async {
+    KRLogUtil.kr_i('🌎 [v2.1] 开始选择国家: $country', tag: 'SingBox');
+
+    if (country == 'auto') {
+      KRLogUtil.kr_i('🌀 国家为 auto，执行自动节点选择逻辑', tag: 'SingBox');
+      await kr_selectOutbound('auto');
+      return;
+    }
+
+    if (kr_activeGroups.isEmpty) {
+      KRLogUtil.kr_w('⚠️ kr_activeGroups 当前为空，无法进行国家选择', tag: 'SingBox');
+      return;
+    }
+
+    /*final selectGroup = kr_activeGroups.firstWhere(
+          (group) => group.tag == 'select',
+      orElse: () => throw Exception('未找到 "select" 组'),
+    );
+
+    final countryNodes = selectGroup.items.where((item) {
+      final nodeCountry = item.options?['country'] ?? '';
+      return nodeCountry.toString().toLowerCase() == country.toLowerCase();
+    }).toList();
+
+    if (countryNodes.isEmpty) {
+      KRLogUtil.kr_w('⚠️ 未找到该国家的节点: $country', tag: 'SingBox');
+      for (var item in selectGroup.items) {
+        KRLogUtil.kr_d(
+          '  可用节点: ${item.tag} (${item.options?['country'] ?? '未知'})',
+          tag: 'SingBox',
+        );
+      }
+      return;
+    }
+
+    KRLogUtil.kr_i('🇨🇭 找到 ${countryNodes.length} 个属于 "$country" 的节点', tag: 'SingBox');
+
+    // 按延迟排序（无延迟则 9999）
+    countryNodes.sort((a, b) =>
+        (a.urlTestDelay ?? 9999).compareTo(b.urlTestDelay ?? 9999));
+
+    final fastestNode = countryNodes.first;
+    final selectedTag = fastestNode.tag;
+    final delay = fastestNode.urlTestDelay ?? -1;
+
+    KRLogUtil.kr_i('✅ 选中该国家最快节点: $selectedTag (${delay}ms)', tag: 'SingBox');
+
+    try {
+      await KRSecureStorage().kr_saveData(key: 'selected_country', value: country);
+      await KRSecureStorage().kr_saveData(key: _keySelectedNode, value: selectedTag);
+    } catch (e) {
+      KRLogUtil.kr_w('⚠️ 保存国家/节点信息失败: $e', tag: 'SingBox');
+    }
+
+    try {
+      await _kr_ensureCommandClientInitialized();
+      await _kr_selectOutboundWithRetry('select', selectedTag,
+          maxAttempts: 3, initialDelay: 100);
+      KRLogUtil.kr_i('✅ 国家内节点切换成功: $selectedTag', tag: 'SingBox');
+    } catch (e) {
+      KRLogUtil.kr_e('❌ 国家内节点选择失败: $e', tag: 'SingBox');
+      rethrow;
+    }
+
+    _nodeSelectionTimer?.cancel();
+    KRLogUtil.kr_i('🔁 启动定时器防止节点被 auto 覆盖', tag: 'SingBox');
+    _nodeSelectionTimer =
+        Timer.periodic(const Duration(seconds: 20), (timer) async {
+          try {
+            await kr_singBox.selectOutbound('select', selectedTag).run();
+            KRLogUtil.kr_d('🔁 定时确认国家内节点: $selectedTag', tag: 'SingBox');
+          } catch (e) {
+            KRLogUtil.kr_w('🔁 定时确认失败: $e', tag: 'SingBox');
+          }
+        });*/
+  }
+
+
   /// 配合文件地址
 
   Directory get directory =>