#include <iostream>
#include "StopWatchT.h"
#include <chrono>
#include <vector>
#include <string>

using namespace std;
using namespace std::chrono;

const vector<string> UNITS{"hour", "minute","second", "milisecond","microsecond","nanosecond"};

string TimeUnitTToString(TimeUnitT u) {
    return UNITS[static_cast<int>(u)];
}

void StopWatchT::Start(){
    start = high_resolution_clock::now();
    diff = diff.zero();
}

void StopWatchT::Stop(){
    end = high_resolution_clock::now();
    diff += end - start;
}

void StopWatchT::Continue(){
    start = high_resolution_clock::now();
}

void StopWatchT::PrintTimes(){
     cout << duration<double, nano>{diff}.count() << " ns" << endl;
     cout << duration<double, micro>{diff}.count() << " us" << endl;
     cout << duration<double, milli>{diff}.count() << " ms" << endl;
     cout << duration<double, ratio<1,1>>{diff}.count()
          << " s" << endl;
     cout << duration<double, ratio<60,1>>{diff}.count()
          << " m" << endl;
     cout << duration<double, ratio<3'600,1>>{diff}.count() 
          << " h" << endl;
}

double StopWatchT::TimeInUnit(TimeUnitT u){
     switch (u) {
         case TimeUnitT::HOUR: 
             return  duration<double, ratio<3'600,1>>{diff}.count();
         case TimeUnitT::MINUTE: 
             return  duration<double, ratio<60,1>>{diff}.count();
         case TimeUnitT::SECOND:
             return duration<double, ratio<1,1>>{diff}.count();
         case TimeUnitT::MILLISECOND:
             return duration<double, milli>{diff}.count();
         case TimeUnitT::MICROSECOND:
             return duration<double, micro>{diff}.count();
         case TimeUnitT::NANOSECOND:
             return duration<double, nano>{diff}.count();
         default: return 0;
     }
}