#pragma once

namespace google
{
    namespace protobuf
    {
        class Descriptor;
        class Message;
    }
}

namespace a8
{
    namespace mysql
    {
        class Query;
    }
}

bool ReadCsvMetaFile(const std::string& filename,
                     google::protobuf::Message* prototype,
                     std::function<void (google::protobuf::Message*)> push_back_func);

template <typename T>
bool ReadCsvMetaFile(const std::string& filename, std::list<T>& meta_list)
{
    T dummy;
    return ReadCsvMetaFile(filename,
                           &dummy,
                           [&meta_list] (google::protobuf::Message* msg)
                           {
                               T t;
                               t.CopyFrom(*msg);
                               meta_list.emplace_back(t);
                           });
}

template <typename T1,
          typename T2>
static void RepeatedFieldToVector(const T1& t1, T2& t2)
{
    t2.clear();
    for (auto& val : t1) {
        t2.push_back(val);
    }
}

template <typename T1,
          typename T2>
static void RepeatedFieldToSet(const T1& t1, T2& t2)
{
    t2.clear();
    for (auto& val : t1) {
        t2.insert(val);
    }
}

template <typename T1,
          typename T2>
static void VectorToRepeatedField(const T1& t1, T2& t2)
{
    t2.Clear();
    for (auto& val : t1) {
        *t2.Add() = val;
    }
}

template <typename T1,
          typename T2>
static void SetToRepeatedField(const T1& t1, T2& t2)
{
    t2.Clear();
    for (auto& val : t1) {
        *t2.Add() = val;
    }
}

void InitMysqlConnection(a8::mysql::Query* query);