// Protocol Buffers - Google's data interchange format
// Copyright 2008 Google Inc.  All rights reserved.
// https://developers.google.com/protocol-buffers/
//
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//
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// in the documentation and/or other materials provided with the
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

#include <sstream>

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

#include <google/protobuf/compiler/csharp/csharp_helpers.h>
#include <google/protobuf/compiler/csharp/csharp_enum_field.h>

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

EnumFieldGenerator::EnumFieldGenerator(const FieldDescriptor* descriptor,
                                       int fieldOrdinal)
    : PrimitiveFieldGenerator(descriptor, fieldOrdinal) {
}

EnumFieldGenerator::~EnumFieldGenerator() {
}

void EnumFieldGenerator::GenerateParsingCode(io::Printer* printer) {
  printer->Print(variables_,
                 "object unknown;\n"
                 "if(input.ReadEnum(ref result.$name$_, out unknown)) {\n");
  if (SupportFieldPresence(descriptor_->file())) {
    printer->Print(variables_,
                   "  result.has$property_name$ = true;\n");
  }
  printer->Print("} else if(unknown is int) {\n");
  if (!use_lite_runtime()) {
    printer->Print(variables_,
                   "  if (unknownFields == null) {\n"  // First unknown field - create builder now
                   "    unknownFields = pb::UnknownFieldSet.CreateBuilder(this.UnknownFields);\n"
                   "  }\n"
                   "  unknownFields.MergeVarintField($number$, (ulong)(int)unknown);\n");
  }
  printer->Print("}\n");
}

void EnumFieldGenerator::GenerateSerializationCode(io::Printer* printer) {
  printer->Print(variables_,
                 "if ($has_property_check$) {\n"
                 "  output.WriteEnum($number$, field_names[$field_ordinal$], (int) $property_name$, $property_name$);\n"
                 "}\n");
}

void EnumFieldGenerator::GenerateSerializedSizeCode(io::Printer* printer) {
  printer->Print(
      variables_,
      "if ($has_property_check$) {\n"
      "  size += pb::CodedOutputStream.ComputeEnumSize($number$, (int) $property_name$);\n"
      "}\n");
}

EnumOneofFieldGenerator::EnumOneofFieldGenerator(const FieldDescriptor* descriptor,
						 int fieldOrdinal)
  : PrimitiveOneofFieldGenerator(descriptor, fieldOrdinal) {
}

EnumOneofFieldGenerator::~EnumOneofFieldGenerator() {
}

void EnumOneofFieldGenerator::GenerateParsingCode(io::Printer* printer) {
  printer->Print(
    variables_,
    "object unknown;\n"
    "$type_name$ enumValue = $default_value$;\n"
    "if(input.ReadEnum(ref enumValue, out unknown)) {\n"
    "  result.$oneof_name$_ = enumValue;\n"
    "  result.$oneof_name$Case_ = $oneof_property_name$OneofCase.$property_name$;\n"
    "} else if(unknown is int) {\n");
  if (!use_lite_runtime()) {
    printer->Print(
      variables_,
      "  if (unknownFields == null) {\n"  // First unknown field - create builder now
      "    unknownFields = pb::UnknownFieldSet.CreateBuilder(this.UnknownFields);\n"
      "  }\n"
      "  unknownFields.MergeVarintField($number$, (ulong)(int)unknown);\n");
  }
  printer->Print("}\n");
}

void EnumOneofFieldGenerator::GenerateSerializationCode(io::Printer* printer) {
  printer->Print(
    variables_,
    "if ($has_property_check$) {\n"
    "  output.WriteEnum($number$, field_names[$field_ordinal$], (int) $property_name$, $property_name$);\n"
    "}\n");
}

void EnumOneofFieldGenerator::GenerateSerializedSizeCode(io::Printer* printer) {
  printer->Print(
    variables_,
    "if ($has_property_check$) {\n"
    "  size += pb::CodedOutputStream.ComputeEnumSize($number$, (int) $property_name$);\n"
    "}\n");
}

}  // namespace csharp
}  // namespace compiler
}  // namespace protobuf
}  // namespace google
