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#ifndef GRPCXX_CHANNEL_ARGUMENTS_H
#define GRPCXX_CHANNEL_ARGUMENTS_H

#include <vector>
#include <list>

#include <grpc++/config.h>
#include <grpc/grpc.h>

namespace grpc {
namespace testing {
class ChannelArgumentsTest;
}  // namespace testing

// Options for channel creation. The user can use generic setters to pass
// key value pairs down to c channel creation code. For grpc related options,
// concrete setters are provided.
class ChannelArguments {
 public:
  ChannelArguments() {}
  ~ChannelArguments() {}

  // grpc specific channel argument setters
  // Set target name override for SSL host name checking.
  void SetSslTargetNameOverride(const grpc::string& name);
  // TODO(yangg) add flow control options

  // Generic channel argument setters. Only for advanced use cases.
  void SetInt(const grpc::string& key, int value);
  void SetString(const grpc::string& key, const grpc::string& value);

  // Populates given channel_args with args_, does not take ownership.
  void SetChannelArgs(grpc_channel_args* channel_args) const;

 private:
  friend class SecureCredentials;
  friend class testing::ChannelArgumentsTest;

  // TODO(yangg) implement copy and assign
  ChannelArguments(const ChannelArguments&);
  ChannelArguments& operator=(const ChannelArguments&);

  // Returns empty string when it is not set.
  grpc::string GetSslTargetNameOverride() const;

  std::vector<grpc_arg> args_;
  std::list<grpc::string> strings_;
};

}  // namespace grpc

#endif  // GRPCXX_CHANNEL_ARGUMENTS_H
