// Protocol Buffers - Google's data interchange format
// Copyright 2008 Google Inc.  All rights reserved.
// https://developers.google.com/protocol-buffers/
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#ifndef GOOGLE_PROTOBUF_COMPILER_OBJECTIVEC_MESSAGE_H__
#define GOOGLE_PROTOBUF_COMPILER_OBJECTIVEC_MESSAGE_H__

#include <string>
#include <set>
#include <vector>
#include <google/protobuf/compiler/objectivec/objectivec_field.h>
#include <google/protobuf/compiler/objectivec/objectivec_oneof.h>
#include <google/protobuf/descriptor.h>
#include <google/protobuf/io/printer.h>

namespace google {
namespace protobuf {
namespace compiler {
namespace objectivec {

class ExtensionGenerator;
class EnumGenerator;

class MessageGenerator {
 public:
  MessageGenerator(const std::string& root_classname,
                   const Descriptor* descriptor);
  ~MessageGenerator();

  MessageGenerator(const MessageGenerator&) = delete;
  MessageGenerator& operator=(const MessageGenerator&) = delete;

  void GenerateStaticVariablesInitialization(io::Printer* printer);
  void GenerateEnumHeader(io::Printer* printer);
  void GenerateMessageHeader(io::Printer* printer);
  void GenerateSource(io::Printer* printer);
  void GenerateExtensionRegistrationSource(io::Printer* printer);
  void DetermineObjectiveCClassDefinitions(std::set<std::string>* fwd_decls);
  void DetermineForwardDeclarations(std::set<std::string>* fwd_decls,
                                    bool include_external_types);

  // Checks if the message or a nested message includes a oneof definition.
  bool IncludesOneOfDefinition() const;

 private:
  void GenerateParseFromMethodsHeader(io::Printer* printer);

  void GenerateSerializeOneFieldSource(io::Printer* printer,
                                       const FieldDescriptor* field);
  void GenerateSerializeOneExtensionRangeSource(
      io::Printer* printer, const Descriptor::ExtensionRange* range);

  void GenerateMessageDescriptionSource(io::Printer* printer);
  void GenerateDescriptionOneFieldSource(io::Printer* printer,
                                         const FieldDescriptor* field);

  const std::string root_classname_;
  const Descriptor* descriptor_;
  FieldGeneratorMap field_generators_;
  const std::string class_name_;
  const std::string deprecated_attribute_;
  std::vector<std::unique_ptr<ExtensionGenerator>> extension_generators_;
  std::vector<std::unique_ptr<EnumGenerator>> enum_generators_;
  std::vector<std::unique_ptr<MessageGenerator>> nested_message_generators_;
  std::vector<std::unique_ptr<OneofGenerator>> oneof_generators_;
};

}  // namespace objectivec
}  // namespace compiler
}  // namespace protobuf
}  // namespace google

#endif  // GOOGLE_PROTOBUF_COMPILER_OBJECTIVEC_MESSAGE_H__