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#ifndef GRPC_TEST_CPP_UTIL_PROTO_FILE_PARSER_H
#define GRPC_TEST_CPP_UTIL_PROTO_FILE_PARSER_H

#include <memory>

#include <google/protobuf/compiler/importer.h>
#include <google/protobuf/dynamic_message.h>
#include <grpc++/channel.h>

#include "src/compiler/config.h"
#include "test/cpp/util/proto_reflection_descriptor_database.h"

namespace grpc {
namespace testing {
class ErrorPrinter;

// Find method and associated request/response types.
class ProtoFileParser {
 public:
  // The given proto file_name will be searched in a source tree rooted from
  // proto_path. The method could be a partial string such as Service.Method or
  // even just Method. It will log an error if there is ambiguity.
  ProtoFileParser(const grpc::string& proto_path, const grpc::string& file_name,
                  const grpc::string& method);

  ProtoFileParser(std::shared_ptr<grpc::Channel> channel,
                  const grpc::string& method);
  ~ProtoFileParser();

  grpc::string GetFullMethodName() const { return full_method_name_; }

  grpc::string GetSerializedProto(const grpc::string& text_format_proto,
                                  bool is_request);

  grpc::string GetTextFormat(const grpc::string& serialized_proto,
                             bool is_request);

  bool HasError() const { return has_error_; }

  void LogError(const grpc::string& error_msg);

 private:
  void InitProtoFileParser(
      const grpc::string& method,
      const std::vector<const google::protobuf::ServiceDescriptor*> services);

  bool has_error_;
  grpc::string request_text_;
  grpc::string full_method_name_;
  google::protobuf::compiler::DiskSourceTree source_tree_;
  std::unique_ptr<ErrorPrinter> error_printer_;
  std::unique_ptr<google::protobuf::compiler::Importer> importer_;
  std::unique_ptr<grpc::ProtoReflectionDescriptorDatabase> desc_db_;
  std::unique_ptr<google::protobuf::DescriptorPool> desc_pool_;
  std::unique_ptr<google::protobuf::DynamicMessageFactory> dynamic_factory_;
  std::unique_ptr<grpc::protobuf::Message> request_prototype_;
  std::unique_ptr<grpc::protobuf::Message> response_prototype_;
};

}  // namespace testing
}  // namespace grpc

#endif  // GRPC_TEST_CPP_UTIL_PROTO_FILE_PARSER_H