#include "log.hh"
#include "time_io.hh"
#include <chrono>
#include <iostream>

Log::Log() {
  log_file = "./tick_times.log";
  opened = false;
}

Log::~Log() {
  if (opened) { close_log_file(); }
}

void Log::open_log_file() {
  log = fopen(log_file, "w");
  if (!log) {
    std::cerr << "Couldn't create or open file: " << log_file << std::endl;
    exit(EXIT_FAILURE);
  }
  else { opened = true; }
}

void Log::close_log_file() { fclose(log); }

long long unsigned int Log::now_in_ns() {
  std::chrono::time_point<std::chrono::system_clock> now = std::chrono::system_clock::now();

  time_t tnow = std::chrono::system_clock::to_time_t(now);
  tm *date = std::localtime(&tnow);
  date->tm_hour = 0;
  date->tm_min = 0;
  date->tm_sec = 0;
  tp_t midnight = std::chrono::system_clock::from_time_t(std::mktime(date));

  return std::chrono::duration_cast<std::chrono::nanoseconds>(now - midnight).count();
}

void Log::print_time_to_file() { fprintf(log, "%llu\n", now_in_ns()); }