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#include <grpc/grpc_security.h>

#include <grpc++/server_credentials.h>

namespace grpc {

namespace {
class SecureServerCredentials final : public ServerCredentials {
 public:
  explicit SecureServerCredentials(grpc_server_credentials* creds) : creds_(creds) {}
  ~SecureServerCredentials() override {
    grpc_server_credentials_release(creds_);
  }

  int AddPortToServer(const grpc::string& addr, grpc_server* server) override {
    return grpc_server_add_secure_http2_port(server, addr.c_str(), creds_);
  }

 private:
  grpc_server_credentials* const creds_;
};
}  // namespace

std::shared_ptr<ServerCredentials> SslServerCredentials(
    const SslServerCredentialsOptions &options) {
  std::vector<grpc_ssl_pem_key_cert_pair> pem_key_cert_pairs;
  for (const auto &key_cert_pair : options.pem_key_cert_pairs) {
    pem_key_cert_pairs.push_back(
        {key_cert_pair.private_key.c_str(), key_cert_pair.cert_chain.c_str()});
  }
  grpc_server_credentials *c_creds = grpc_ssl_server_credentials_create(
      options.pem_root_certs.empty() ? nullptr : options.pem_root_certs.c_str(),
      &pem_key_cert_pairs[0], pem_key_cert_pairs.size());
  return std::shared_ptr<ServerCredentials>(new SecureServerCredentials(c_creds));
}

}  // namespace grpc