/*
 *
 * Copyright 2015-2016, Google Inc.
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 * modification, are permitted provided that the following conditions are
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 *
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 * notice, this list of conditions and the following disclaimer.
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 * in the documentation and/or other materials provided with the
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 * contributors may be used to endorse or promote products derived from
 * this software without specific prior written permission.
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#include <memory>
#include <sstream>

#include <grpc++/channel.h>
#include <grpc++/create_channel.h>
#include <grpc++/impl/grpc_library.h>
#include <grpc++/support/channel_arguments.h>

#include "src/cpp/client/create_channel_internal.h"

namespace grpc {
class ChannelArguments;

std::shared_ptr<Channel> CreateChannel(
    const grpc::string& target,
    const std::shared_ptr<ChannelCredentials>& creds) {
  return CreateCustomChannel(target, creds, ChannelArguments());
}

std::shared_ptr<Channel> CreateCustomChannel(
    const grpc::string& target,
    const std::shared_ptr<ChannelCredentials>& creds,
    const ChannelArguments& args) {
  internal::GrpcLibrary
      init_lib;  // We need to call init in case of a bad creds.
  ChannelArguments cp_args = args;
  std::ostringstream user_agent_prefix;
  user_agent_prefix << "grpc-c++/" << grpc_version_string();
  cp_args.SetString(GRPC_ARG_PRIMARY_USER_AGENT_STRING,
                    user_agent_prefix.str());
  return creds
             ? creds->CreateChannel(target, cp_args)
             : CreateChannelInternal("", grpc_lame_client_channel_create(
                                             NULL, GRPC_STATUS_INVALID_ARGUMENT,
                                             "Invalid credentials."));
}

}  // namespace grpc
