#ifndef OPENMC_XML_INTERFACE_H
#define OPENMC_XML_INTERFACE_H

#include <cstddef> // for size_t
#include <sstream> // for stringstream
#include <string>
#include <vector>

#include "pugixml.hpp"
#include "xtensor/xarray.hpp"
#include "xtensor/xadapt.hpp"

namespace openmc {

inline bool
check_for_node(pugi::xml_node node, const char *name)
{
  return node.attribute(name) || node.child(name);
}

std::string get_node_value(pugi::xml_node node, const char* name,
                           bool lowercase=false, bool strip=false);

bool get_node_value_bool(pugi::xml_node node, const char* name);

template <typename T>
std::vector<T> get_node_array(pugi::xml_node node, const char* name,
                              bool lowercase=false)
{
  // Get value of node attribute/child
  std::string s {get_node_value(node, name, lowercase)};

  // Read values one by one into vector
  std::stringstream iss {s};
  T value;
  std::vector<T> values;
  while (iss >> value)
    values.push_back(value);

  return values;
}

template <typename T>
xt::xarray<T> get_node_xarray(pugi::xml_node node, const char* name,
                              bool lowercase=false)
{
  std::vector<T> v = get_node_array<T>(node, name, lowercase);
  std::vector<std::size_t> shape = {v.size()};
  return xt::adapt(v, shape);
}

} // namespace openmc
#endif // OPENMC_XML_INTERFACE_H