/*
 * Cppcheck - A tool for static C/C++ code analysis
 * Copyright (C) 2007-2019 Cppcheck team.
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program. If not, see <http://www.gnu.org/licenses/>.
 */

#include "timer.h"

#include <algorithm>
#include <iostream>
#include <utility>
#include <vector>
/*
 TODO:
 - rename "file" to "single"
 - synchronise map access in multithreaded mode or disable timing
 - add unit tests
 - for --showtime (needs input file)
 - for Timer* classes
*/

namespace {
 typedef std::pair<std::string, struct TimerResultsData> dataElementType;
 bool more_second_sec(const dataElementType& lhs, const dataElementType& rhs)
 {
 return lhs.second.seconds() > rhs.second.seconds();
 }
}

void TimerResults::showResults(SHOWTIME_MODES mode) const
{
 if (mode == SHOWTIME_MODES::SHOWTIME_NONE)
 return;

 std::cout << std::endl;
 TimerResultsData overallData;

 std::vector<dataElementType> data(mResults.begin(), mResults.end());
 std::sort(data.begin(), data.end(), more_second_sec);

 size_t ordinal = 1; // maybe it would be nice to have an ordinal in output later!
 for (std::vector<dataElementType>::const_iterator iter=data.begin() ; iter!=data.end(); ++iter) {
 const double sec = iter->second.seconds();
 const double secAverage = sec / (double)(iter->second.mNumberOfResults);
 overallData.mClocks += iter->second.mClocks;
 if ((mode != SHOWTIME_MODES::SHOWTIME_TOP5) || (ordinal<=5)) {
 std::cout << iter->first << ": " << sec << "s (avg. " << secAverage << "s - " << iter->second.mNumberOfResults << " result(s))" << std::endl;
 }
 ++ordinal;
 }

 const double secOverall = overallData.seconds();
 std::cout << "Overall time: " << secOverall << "s" << std::endl;
}

void TimerResults::addResults(const std::string& str, std::clock_t clocks)
{
 mResults[str].mClocks += clocks;
 mResults[str].mNumberOfResults++;
}

Timer::Timer(const std::string& str, SHOWTIME_MODES showtimeMode, TimerResultsIntf* timerResults)
 : mStr(str)
 , mTimerResults(timerResults)
 , mStart(0)
 , mShowTimeMode(showtimeMode)
 , mStopped(false)
{
 if (showtimeMode != SHOWTIME_MODES::SHOWTIME_NONE)
 mStart = std::clock();
}

Timer::~Timer()
{
 stop();
}

void Timer::stop()
{
 if ((mShowTimeMode != SHOWTIME_MODES::SHOWTIME_NONE) && !mStopped) {
 const std::clock_t end = std::clock();
 const std::clock_t diff = end - mStart;

 if (mShowTimeMode == SHOWTIME_MODES::SHOWTIME_FILE) {
 const double sec = (double)diff / CLOCKS_PER_SEC;
 std::cout << mStr << ": " << sec << "s" << std::endl;
 } else {
 if (mTimerResults)
 mTimerResults->addResults(mStr, diff);
 }
 }

 mStopped = true;
}