/**
  * Helper class for a vector of integer (stored as integer[] in the postgres database
  * $Id$
  * $HeadURL$
  * $Author$
  * Created by Christian Ehrlicher, SLSE, 2016-05-03
  */

#pragma once
#include <QString>
#include <map>
#include <vector>
#include <cstdint>

namespace LtsUtils
{

template<typename T, typename C>
class PgArray
{
public:
  using Type =  T;
  using ContainerType = C;

  PgArray() = default;
  Q_DECL_CONSTEXPR explicit PgArray(const C &data)
    : m_data(data)
  {}

  Q_DECL_CONSTEXPR C operator()()const
  {
    return m_data;
  }

  QString toPgString() const;
  static PgArray fromPgString(const QString &str);
private:
  C m_data;
};

// helper to convert a postgres array (one-dimensional) into a std::vector<T> and vice versa
// { 1, 5, 5, 2, 9 }
using IntArray = PgArray<int, std::vector<int>>;                    // integer[]
using BigintArray = PgArray<int64_t, std::vector<int64_t>>;         // bigint[]
// helper to convert a two-dimensional postgres array into a std::map<T, T> and vice versa
// { { 1, 2 }, { 4, 3 }, { 10, 1 } }
using IntArray2D = PgArray<int, std::map<int, int>>;                // integer[][]
using BigintArray2D = PgArray<int64_t, std::map<int64_t, int64_t>>; // bigint[][]

} // namespace LtsUtils