#pragma once

#include <memory>

#include "envoy/common/pure.h"

#include "envoy/config/core/v3/grpc_service.pb.h"

#include "envoy/config/typed_config.h"

#include "envoy/server/factory_context.h"

#include "grpcpp/grpcpp.h"

namespace Envoy {

namespace Grpc {

/**

 * Interface for all Google gRPC credentials factories.

 */

class GoogleGrpcCredentialsFactory : public Config::UntypedFactory {

public:

  /**

   * Get a ChannelCredentials to be used for authentication of a gRPC channel.

   *

   * GoogleGrpcCredentialsFactory should always return a ChannelCredentials. To use CallCredentials,

   * the ChannelCredentials can be created by using a combination of CompositeChannelCredentials and

   * CompositeCallCredentials to combine multiple credentials.

   *

   * @param grpc_service_config contains configuration options

   * @param api reference to the Api object

   * @return std::shared_ptr<grpc::ChannelCredentials> to be used to authenticate a Google gRPC

   * channel.

   */

  virtual std::shared_ptr<grpc::ChannelCredentials>

  getChannelCredentials(const envoy::config::core::v3::GrpcService& grpc_service_config,

                        Server::Configuration::CommonFactoryContext& context) PURE;

};

} // namespace Grpc

} // namespace Envoy