#include "config.hpp"
#include <llarp/config.h>
#include "ini.hpp"
#include "mem.hpp"

namespace llarp {

template <typename Config, typename Section>
static Section find_section(Config &c, const std::string &name,
                            const Section &fallback) {
  if (c.sections.find(name) == c.sections.end()) return fallback;
  return c.sections[name].values;
}

bool Config::Load(const char *fname) {
  std::ifstream f;
  f.open(fname);
  if (f.is_open()) {
    ini::Parser parser(f);
    auto &top = parser.top();
    router = find_section(top, "router", section_t{});
    network = find_section(top, "network", section_t{});
    netdb = find_section(top, "netdb", section_t{});
    links = find_section(top, "links", section_t{});
    return true;
  }
  return false;
};

}  // namespace llarp

extern "C" {

void llarp_new_config(struct llarp_config **conf) {
  llarp_config *c = new llarp_config;
  *conf = c;
}

void llarp_free_config(struct llarp_config **conf) {
  if (*conf) delete *conf;
  *conf = nullptr;
}

int llarp_load_config(struct llarp_config *conf, const char *fname) {
  if (!conf->impl.Load(fname)) return -1;
  return 0;
}

void llarp_config_iter(struct llarp_config *conf,
                       struct llarp_config_iterator *iter) {
  iter->conf = conf;
  std::map<std::string, llarp::Config::section_t &> sections = {
      {"router", conf->impl.router},
      {"network", conf->impl.network},
      {"links", conf->impl.links},
      {"netdb", conf->impl.netdb}};
  for (const auto &section : sections)
    for (const auto &item : section.second)
      iter->visit(iter, section.first.c_str(), item.first.c_str(),
                  item.second.c_str());
}
}