#include <a8/a8.h>

#include <a8/stringlist.h>
#include <a8/csvreader.h>

#include <google/protobuf/message.h>

#include "utils.h"


bool ReadCsvMetaFile(const std::string& filename,
                     google::protobuf::Message* prototype,
                     std::function<void (google::protobuf::Message*)> push_back_func)
{
    const google::protobuf::Descriptor* descriptor = prototype->GetDescriptor();
    const google::protobuf::Reflection* reflection = prototype->GetReflection();

    a8::CsvReader reader;
    reader.Load(filename);
    while (reader.NextLine()) {
        google::protobuf::Message* msg = prototype->New();

        for (int i = 0; i < descriptor->field_count(); ++i) {
            const google::protobuf::FieldDescriptor* field_desc = descriptor->field(i);
            const std::string& field_name = field_desc->name();

            switch (field_desc->cpp_type()) {
            case google::protobuf::FieldDescriptor::CPPTYPE_STRING:
                {
                    reflection->SetString(msg, field_desc, reader.GetValue(field_name));
                }
                break;
            case google::protobuf::FieldDescriptor::CPPTYPE_INT32:
                {
                    reflection->SetInt32(msg, field_desc, reader.GetValue(field_name));
                }
                break;
            case google::protobuf::FieldDescriptor::CPPTYPE_UINT32:
                {
                    reflection->SetUInt32(msg, field_desc, reader.GetValue(field_name));
                }
                break;
            case google::protobuf::FieldDescriptor::CPPTYPE_INT64:
                {
                    reflection->SetInt64(msg, field_desc, reader.GetValue(field_name));
                }
                break;
            case google::protobuf::FieldDescriptor::CPPTYPE_UINT64:
                {
                    reflection->SetUInt64(msg, field_desc, reader.GetValue(field_name));
                }
                break;
            case google::protobuf::FieldDescriptor::CPPTYPE_FLOAT:
                {
                    reflection->SetFloat(msg, field_desc, (double)reader.GetValue(field_name));
                }
                break;
            case google::protobuf::FieldDescriptor::CPPTYPE_DOUBLE:
                {
                    reflection->SetDouble(msg, field_desc, reader.GetValue(field_name));
                }
                break;
            default:
                {
                    abort();
                }
                break;
            }//end switch
        }//end for
        push_back_func(msg);
        delete msg;
    }

    return true;
}