#include <eqpm/utility.h>

namespace UtilityTools {

TimePoint time_point2zero(TimePoint time_point) {
  return second_zero2time_point(time_point2second_zero(time_point));
}

int time_point2second_zero(TimePoint time_point) {
  int seconds = (time_point.time_since_epoch().count()) / (size_t)pow(10, 9);
  return 86400 * (int)((seconds + 28800) / 86400) - 28800;
}

TimePoint second_zero2time_point(int seconds) {
  auto st_s = std::chrono::seconds(seconds);
  auto time_date =
      std::chrono::time_point<std::chrono::system_clock, std::chrono::seconds>(
          st_s);
  return time_date;
}

int diff_days(TimePoint stime, TimePoint etime) {
  return std::chrono::duration_cast<days>(etime - stime).count();
}

TimePoint string2TimePoint(std::string time_str, const std::string& fmt) {
  std::tm tm = {};
  std::stringstream ss(time_str);
  ss >> std::get_time(&tm, fmt.c_str());
  return std::chrono::system_clock::from_time_t(std::mktime(&tm));
}
}  // namespace UtilityTools