// Protocol Buffers - Google's data interchange format
// Copyright 2008 Google Inc.  All rights reserved.
// https://developers.google.com/protocol-buffers/
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
//     * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
//     * Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following disclaimer
// in the documentation and/or other materials provided with the
// distribution.
//     * Neither the name of Google Inc. nor the names of its
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

// Author: kenton@google.com (Kenton Varda)
//  Based on original Protocol Buffers design by
//  Sanjay Ghemawat, Jeff Dean, and others.

#ifndef GOOGLE_PROTOBUF_COMPILER_CSHARP_HELPERS_H__
#define GOOGLE_PROTOBUF_COMPILER_CSHARP_HELPERS_H__

#include <string>
#include <google/protobuf/descriptor.pb.h>
#include <google/protobuf/descriptor.h>
#include <google/protobuf/compiler/code_generator.h>
#include <google/protobuf/io/printer.h>

namespace google {
namespace protobuf {
namespace compiler {
namespace csharp {

class FieldGeneratorBase;

// TODO: start using this enum.
enum CSharpType {
  CSHARPTYPE_INT32 = 1,
  CSHARPTYPE_INT64 = 2,
  CSHARPTYPE_UINT32 = 3,
  CSHARPTYPE_UINT64 = 4,
  CSHARPTYPE_FLOAT = 5,
  CSHARPTYPE_DOUBLE = 6,
  CSHARPTYPE_BOOL = 7,
  CSHARPTYPE_STRING = 8,
  CSHARPTYPE_BYTESTRING = 9,
  CSHARPTYPE_MESSAGE = 10,
  CSHARPTYPE_ENUM = 11,
  MAX_CSHARPTYPE = 11
};

// Converts field type to corresponding C# type.
CSharpType GetCSharpType(FieldDescriptor::Type type);

std::string StripDotProto(const std::string& proto_file);

std::string GetFileNamespace(const FileDescriptor* descriptor);
std::string GetFileUmbrellaClassname(const FileDescriptor* descriptor);
std::string GetFileUmbrellaNamespace(const FileDescriptor* descriptor);

std::string GetFullUmbrellaClassName(const FileDescriptor* descriptor);

std::string GetQualifiedUmbrellaClassName(const FileDescriptor* descriptor);

std::string GetClassName(const Descriptor* descriptor);
std::string GetClassName(const EnumDescriptor* descriptor);

std::string GetFieldName(const FieldDescriptor* descriptor);

std::string GetFieldConstantName(const FieldDescriptor* field);

std::string GetPropertyName(const FieldDescriptor* descriptor);

int GetFixedSize(FieldDescriptor::Type type);

std::string UnderscoresToCamelCase(const std::string& input, bool cap_next_letter, bool preserve_period);

inline std::string UnderscoresToCamelCase(const std::string& input, bool cap_next_letter) {
  return UnderscoresToCamelCase(input, cap_next_letter, false);
}

std::string UnderscoresToPascalCase(const std::string& input);

// TODO(jtattermusch): perhaps we could move this to strutil
std::string StringToBase64(const std::string& input);

std::string FileDescriptorToBase64(const FileDescriptor* descriptor);

uint FixedMakeTag(const FieldDescriptor* descriptor);

FieldGeneratorBase* CreateFieldGenerator(const FieldDescriptor* descriptor, int fieldOrdinal);

// Determines whether the given message is a map entry message, i.e. one implicitly created
// by protoc due to a map<key, value> field.
inline bool IsMapEntryMessage(const Descriptor* descriptor) {
  return descriptor->options().map_entry();
}

// Determines whether we're generating code for the proto representation of descriptors etc,
// for use in the runtime. This is the only type which is allowed to use proto2 syntax,
// and it generates internal classes.
inline bool IsDescriptorProto(const FileDescriptor* descriptor) {
  // TODO: Do this better! (Currently this depends on a hack in generate_protos.sh to rename
  // the file...)
  return descriptor->name() == "google/protobuf/descriptor_proto_file.proto";
}

inline bool IsMapEntry(const Descriptor* descriptor) {
    return descriptor->options().map_entry();
}

inline bool IsWrapperType(const FieldDescriptor* descriptor) {
  return descriptor->type() == FieldDescriptor::TYPE_MESSAGE &&
      descriptor->message_type()->file()->name() == "google/protobuf/wrappers.proto";
}

}  // namespace csharp
}  // namespace compiler
}  // namespace protobuf
}  // namespace google
#endif  // GOOGLE_PROTOBUF_COMPILER_CSHARP_HELPERS_H__