#include "program.hh"
#include "time_io.hh"
#include "options.hh"

#include <stdlib.h>
#include <limits.h>
#include <unistd.h>
#include <sys/times.h>
#include <math.h>
#include <iostream>
#include <sstream>
#include <chrono>

int number_of_args(std::string program) {
  if      (program == "helloworld")      { return 0; }
  else if (program == "faculty")         { return 1; }
  else {
    std::cerr << "Unknown program: " << program << std::endl;
    exit(EXIT_FAILURE);
  }
}

void run_program (std::string program, std::string** program_args) {
  if       (program == "helloworld") { helloworld(); }
  else if  (program == "faculty")    {
    int highest = atoi(program_args[0]->c_str());
    faculty(highest);
  }
  else {
    std::cerr << "Can't find program: " << program << std::endl;
    exit(EXIT_FAILURE);
  }
}

void helloworld() {
  if (!really_quiet) { std::cout << "Hello, world!" << std::endl; }
}

void faculty(int highest) {
  static int current = 0;
  static int sum = 1;
  bool news = true;
  switch (current) {
  case 0:   { current = highest; sum = 1;  break; }
  case 1:   { news = false;                break; }
  default:  { sum *= current--;            break; }
  }
  if (news and !really_quiet) {
    std::cout << "Faculty is now: " << sum << std::endl;
  }
}