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#pragma once
#include <forstio/error.hpp>
#include <forstio/codec/data.hpp>
#include <forstio/codec/data_math.hpp>
#include "descriptor.hpp"
#include "flatten.hpp"
#include "chunk.hpp"
#include <fstream>
#include <filesystem>
namespace kel {
namespace lbm {
namespace impl {
template<typename CellFieldSchema>
struct lbm_csv_writer {
};
template<typename T, uint64_t D>
struct lbm_csv_writer<sch::Primitive<T,D>> {
static saw::error_or<void> apply(std::ostream& csv_file, const saw::data<sch::Primitive<T,D>>& field){
if constexpr (std::is_same_v<T,sch::UnsignedInteger> and D == 1u) {
csv_file<<field.template cast_to<sch::UInt16>().get();
}else{
csv_file<<field.get();
}
return saw::make_void();
}
};
template<typename T, uint64_t D>
struct lbm_csv_writer<sch::FixedArray<T,D>> {
static saw::error_or<void> apply(std::ostream& csv_file, const saw::data<sch::FixedArray<T,D>>& field){
saw::data<sch::FixedArray<sch::UInt64,D>> index;
for(saw::data<sch::UInt64> it{0}; it.get() < D; ++it){
index.at({0u}).set(0u);
}
// csv_file<<"VECTORS "<<name<<" float\n";
for(uint64_t i = 0u; i < D; ++i){
if(i > 0){
csv_file<<",";
}
csv_file<<field.at({i}).get();
}
return saw::make_void();
}
};
template<typename T, uint64_t Ghost, uint64_t... D>
struct lbm_csv_writer<sch::Chunk<T,Ghost,D...>> {
template<uint64_t d>
static saw::error_or<void> apply_d(std::ostream& csv_file, const saw::data<sch::Chunk<T,Ghost,D...>>& field, saw::data<sch::FixedArray<sch::UInt64,sizeof...(D)>>& index){
// VTK wants to iterate over z,y,x instead of x,y,z
// So we do the same with CSV to stay consistent for now
// We could reorder the dimensions, but eh
if constexpr ( d > 0u){
for(index.at({d-1u}) = 0u; index.at({d-1u}) < field.get_dims().at({d-1u}); ++index.at({d-1u})){
auto eov = apply_d<d-1u>(csv_file, field, index);
}
}else{
auto eov = lbm_csv_writer<T>::apply(csv_file, field.at(index));
csv_file<<"\n";
if(eov.is_error()) return eov;
}
return saw::make_void();
}
static saw::error_or<void> apply(std::ostream& csv_file, const saw::data<sch::Chunk<T,Ghost,D...>>& field, std::string_view name){
saw::data<sch::FixedArray<sch::UInt64,sizeof...(D)>> index;
for(saw::data<sch::UInt64> it{0}; it.get() < sizeof...(D); ++it){
index.at({0u}).set(0u);
}
{
auto eov = apply_d<sizeof...(D)>(csv_file, field, index);
if(eov.is_error()){
return eov;
}
}
return saw::make_void();
}
};
template<typename T, uint64_t D>
struct lbm_csv_writer<sch::Vector<T,D>> {
static saw::error_or<void> apply(std::ostream& csv_file, const saw::data<sch::Vector<T,D>>& field){
static_assert(D > 0, "Non-dimensionality is bad for velocity.");
// csv_file<<"VECTORS "<<name<<" float\n";
for(uint64_t i = 0u; i < D; ++i){
if(i > 0){
csv_file<<",";
}
{
auto eov = lbm_csv_writer<T>::apply(csv_file,field.at({{i}}));
if(eov.is_error()) return eov;
}
}
return saw::make_void();
}
};
template<typename T>
struct lbm_csv_writer<sch::Scalar<T>> {
static saw::error_or<void> apply(std::ostream& csv_file, const saw::data<sch::Scalar<T>>& field){
return lbm_csv_writer<T>::apply(csv_file,field.at({}));
}
};
template<typename... MemberT, saw::string_literal... Keys, uint64_t... Ghost, uint64_t... Dims>
struct lbm_csv_writer<sch::Struct<sch::Member<sch::Chunk<MemberT,Ghost,Dims...>,Keys>...>> final {
template<uint64_t i>
static saw::error_or<void> iterate_i(
const std::filesystem::path& csv_dir, const std::string_view& file_base_name, uint64_t d_t,
const saw::data<sch::Struct<sch::Member<sch::Chunk<MemberT,Ghost,Dims...>,Keys>...>>& field){
if constexpr ( i < sizeof...(MemberT) ) {
using MT = typename saw::parameter_pack_type<i,sch::Member<sch::Chunk<MemberT,Ghost,Dims...>,Keys>...>::type;
{
std::stringstream sstr;
sstr
<<file_base_name
<<"_"
<<MT::Key.view()
<<"_"
<<d_t
<<".csv"
;
std::ofstream csv_file{csv_dir / sstr.str() };
if( not csv_file.is_open() ){
return saw::make_error<saw::err::critical>("Could not open file.");
}
//
auto eov = lbm_csv_writer<typename MT::ValueType>::apply(csv_file,field.template get<MT::KeyLiteral>(), MT::KeyLiteral.view());
if(eov.is_error()){
return eov;
}
}
return iterate_i<i+1u>(csv_dir, file_base_name, d_t,field);
}
return saw::make_void();
}
static saw::error_or<void> apply(
const std::filesystem::path& csv_dir, const std::string_view& file_base_name, uint64_t d_t,
const saw::data<sch::Struct<sch::Member<sch::Chunk<MemberT,Ghost,Dims...>,Keys>...>>& field){
auto& field_0 = field.template get<saw::parameter_key_pack_type<0u,Keys...>::literal>();
auto meta = field_0.get_dims();
return iterate_i<0u>(csv_dir,file_base_name, d_t, field);
}
};
}
template<typename Sch>
saw::error_or<void> write_csv_file(const std::filesystem::path& out_dir, const std::string_view& file_name, uint64_t d_t, const saw::data<Sch>& field){
auto csv_dir = out_dir / "csv";
{
std::error_code ec;
std::filesystem::create_directories(csv_dir,ec);
if(ec != std::errc{}){
return saw::make_error<saw::err::critical>("Could not create directory for write_csv_file function");
}
}
auto eov = impl::lbm_csv_writer<Sch>::apply(csv_dir, file_name, d_t, field);
return eov;
}
}
}
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