#include <iostream>
#include<fstream>
#include<vector>
#include "json.h"

using namespace std;

class Data
{
   public:
      int inum;
      double dnum;
      string s;
      vector<int> intvec1D;
      vector< vector <int> > intvec2D;
};

void initValues(Data* D);
void writeValues(Data* D);
void readValues(Data* D);
void printValues(Data* D);

int main()
{
   Data* Dout = new Data();
   initValues(Dout);
   writeValues(Dout);
   cout << endl << "I wrote:" << endl;
   printValues(Dout);

   Data* Din = new Data();
   readValues(Din);
   cout << endl << "I read:" << endl;
   printValues(Din);
   cout << "[Enter] to exit ..."; cin.get();
   return 0;
}

void initValues(Data* D)
{
   D->inum = 9;
   D->dnum = 1.23;
   D->s    = "a string";
   D->intvec1D = {1,2,3,4};
   D->intvec2D.push_back({11,12,13});
   D->intvec2D.push_back({21,22,23});
   D->intvec2D.push_back({31,32,33});
}

void writeValues(Data* D)
{
	json::Object obj;
   obj["inum"] = D->inum;
   obj["dnum"] = D->dnum;
   obj["s"]    = D->s;

   json::Array vec1D;
   for(int i=0;i<D->intvec1D.size();i++)
      vec1D.push_back(D->intvec1D[i]);
   obj["intvec1D"] = vec1D;

   json::Array vec2D;
   // here I'd expect something like "intvec2D":[[11,12,13],[21,22,23],[21,22,23]]
   for(int i=0;i<D->intvec2D.size();i++)
   {  json::Array vec;
      for(int j=0;j<D->intvec2D.size();j++)
         vec.push_back(D->intvec2D[i][j]);
      vec2D.push_back(vec);
   }
   obj["intvec2D"] = vec2D;

   string str = json::Serialize(obj);

   ofstream outfile;
   outfile.open ("data.json");
   outfile << str << endl;
   outfile.close();
   cout << "json string: " << str << endl;
}

void readValues(Data* D)
{  string line;

   ifstream infile;
   infile.open("data.json");
   getline(infile,line);
   infile.close();

   json::Value JSV = json::Deserialize(line);
   D->inum = JSV["inum"];
   D->dnum = JSV["dnum"];
   D->s    = JSV["s"];

   json::Array vec1 = (json::Array) JSV["intvec1D"];
   for(int i=0;i<vec1.size();i++)
      D->intvec1D.push_back(vec1[i]);

   json::Array vec2 = (json::Array) JSV["intvec2D"];
   // here I read "intvec2D":[[11,12,13],[21,22,23],[21,22,23]]
   for(int i = 0;i<vec2.size();i++)
   {  vector<int> row;
      for(int j=0;j<vec2[i].size();j++)
         row.push_back(vec2[i][j]);
      D->intvec2D.push_back(row);
   }
}

void printValues(Data* D)
{
   cout << "Integer value: " << D->inum << endl;
   cout << "Double  value: " << D->dnum << endl;
   cout << "String:        " << D->s    << endl;
   cout << "Vector 1D: " << endl;
   for(int i=0;i<D->intvec1D.size();i++) cout << D->intvec1D[i] << " ";cout << endl;
   cout << "Vector 2D: " << endl;
   for(int i=0;i<D->intvec2D.size();i++)
   {  for(int j=0;j<D->intvec2D[i].size();j++)
         cout << D->intvec2D[i][j] << " ";
      cout << endl;
   }
}