abstract class Discovery {
  static late Discovery _discovery;

  static Discovery getInstance() {
    return _discovery;
  }

  static void setInstance(Discovery discovery) {
    _discovery = discovery;
  }

  // 注册实例到 Nacos
  Future<bool> registerInstance(String serviceName, String ip, int port,
      {String groupName = 'DEFAULT_GROUP'});

  // 注销实例
  Future<bool> deRegisterInstance(String serviceName, String ip, int port,
      {String groupName = 'DEFAULT_GROUP'});

  // 获取服务实例列表
  Future<List<Map<String, dynamic>>> getInstanceList(String serviceName,
      {String groupName = 'DEFAULT_GROUP'});

  // 获取配置
  Future<String> getConfig(String dataId, {String group = 'DEFAULT_GROUP'});

  //获取配置历史记录

  // 发布配置
  Future<bool> publishConfig(String dataId, String group, String content);

  // 删除配置
  Future<bool> deleteConfig(String dataId, String group);
}

class DiscoveryConfig {
  String host;
  String namespaceId;
  String groupName;
  DiscoveryConfig(
      {required this.host,
      required this.namespaceId,
      this.groupName = "DEFAULT_GROUP"});
}