odm/include/odm.h

#pragma once
#include "BFileW.h"
#include "GPL.h"
#include "NEMO.h"
#include "tindexes.h"

using michlib::BFileW;
using michlib::errmessage;
using michlib::GPL;
using michlib::message;
using michlib::SList;

using DataVariants = std::variant<NEMOData>;
using CLArgs       = std::map<MString, MString>;

class Data: public DataVariants
{
 template<class D> static bool WriteData(BFileW& fw, const D& data)
 {
  for(size_t i = 0; i < data.N(); i++)
  {
   fw.Write(data.Lon(i));
   fw.Write(data.Lat(i));
   fw.Write(data(i) == data.Fillval() ? NAN : data(i));
  }
  return true;
 }

 public:
 Data() = default;

 Data(DataVariants&& d): DataVariants(std::move(d)) {}

 auto Time(size_t it) const
 {
  return std::visit(
      [it = it](const auto& arg) -> auto{ return arg.Time(it); }, *this);
 }
 auto NTimes() const
 {
  return std::visit(
      [](const auto& arg) -> auto{ return arg.NTimes(); }, *this);
 }
 auto Info() const
 {
  return std::visit(
      [](const auto& arg) -> auto{ return arg.Info(); }, *this);
 }

 bool Write(BFileW& fw, VarType vt, const std::vector<size_t>& tindexes) const
 {
  return std::visit(
      [&fw = fw, vt = vt, &ti = tindexes](const auto& d) -> bool
      {
       using T = std::decay_t<decltype(d)>;

       return std::visit(
           [&fw = fw, &ti = ti, &d = d](auto v) -> bool
           {
            constexpr auto cvt = decltype(v)::vt;
            if constexpr(isDataSupported<T, cvt>)
             return WriteData(fw, d.template Read<cvt>(ti));
            else
             return false;
           },
           vt);
      },
      *this);
 }
};

CLArgs ParseArgs(int argc, char** argv);

int actioninfo(const CLArgs& args);
int actiontsc(const CLArgs& args);

inline NEMOData NEMOOpen(const CLArgs& args)
{
 NEMOData ndata;

 MString oldprefix = GPL.UsePrefix("AVISO");
 MString dataset   = args.contains("dataset") ? args.at("dataset") : "DT";
 MString cred      = GPL.ParameterSValue("COPERNICUS_USER", "");
 MString proxy     = GPL.ParameterSValue("COPERNICUS_PROXY", "");

 GPL.UsePrefix(oldprefix);
 ndata.Open(dataset, cred, proxy);
 return ndata;
}