/*M///////////////////////////////////////////////////////////////////////////////////////
//
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//
//  By downloading, copying, installing or using the software you agree to this license.
//  If you do not agree to this license, do not download, install,
//  copy or use the software.
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//
//                           License Agreement
//                For Open Source Computer Vision Library
//
// Copyright (C) 2010-2012, Multicoreware, Inc., all rights reserved.
// Copyright (C) 2010-2012, Advanced Micro Devices, Inc., all rights reserved.
// Third party copyrights are property of their respective owners.

// Redistribution and use in source and binary forms, with or without modification,
// are permitted provided that the following conditions are met:
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#include "perf_precomp.hpp"
#if GTEST_OS_WINDOWS
#ifndef NOMINMAX
#define NOMINMAX
#endif
# include <windows.h>
#endif

// This program test most of the functions in ocl module and generate data metrix of x-factor in .csv files
// All images needed in this test are in samples/gpu folder.
// For haar template, haarcascade_frontalface_alt.xml shouold be in working directory
void TestSystem::run()
{
    if (is_list_mode_)
    {
        for (vector<Runnable *>::iterator it = tests_.begin(); it != tests_.end(); ++it)
        {
            cout << (*it)->name() << endl;
        }

        return;
    }

    // Run test initializers
    for (vector<Runnable *>::iterator it = inits_.begin(); it != inits_.end(); ++it)
    {
        if ((*it)->name().find(test_filter_, 0) != string::npos)
        {
            (*it)->run();
        }
    }

    printHeading();
    writeHeading();

    // Run tests
    for (vector<Runnable *>::iterator it = tests_.begin(); it != tests_.end(); ++it)
    {
        try
        {
            if ((*it)->name().find(test_filter_, 0) != string::npos)
            {
                cout << endl << (*it)->name() << ":\n";

                setCurrentTest((*it)->name());
                //fprintf(record_,"%s\n",(*it)->name().c_str());

                (*it)->run();
                finishCurrentSubtest();
            }
        }
        catch (const Exception &)
        {
            // Message is printed via callback
            resetCurrentSubtest();
        }
        catch (const runtime_error &e)
        {
            printError(e.what());
            resetCurrentSubtest();
        }
    }

    printSummary();
    writeSummary();
}


void TestSystem::finishCurrentSubtest()
{
    if (cur_subtest_is_empty_)
        // There is no need to print subtest statistics
    {
        return;
    }

    double cpu_time = cpu_elapsed_ / getTickFrequency() * 1000.0;
    double gpu_time = gpu_elapsed_ / getTickFrequency() * 1000.0;
    double gpu_full_time = gpu_full_elapsed_ / getTickFrequency() * 1000.0;

    double speedup = static_cast<double>(cpu_elapsed_) / std::max(1.0, gpu_elapsed_);
    speedup_total_ += speedup;

    double fullspeedup = static_cast<double>(cpu_elapsed_) / std::max(1.0, gpu_full_elapsed_);
    speedup_full_total_ += fullspeedup;

    if (speedup > top_)
    {
        speedup_faster_count_++;
    }
    else if (speedup < bottom_)
    {
        speedup_slower_count_++;
    }
    else
    {
        speedup_equal_count_++;
    }

    if (fullspeedup > top_)
    {
        speedup_full_faster_count_++;
    }
    else if (fullspeedup < bottom_)
    {
        speedup_full_slower_count_++;
    }
    else
    {
        speedup_full_equal_count_++;
    }

    // compute min, max and
    std::sort(gpu_times_.begin(), gpu_times_.end());
    double gpu_min = gpu_times_.front() / getTickFrequency() * 1000.0;
    double gpu_max = gpu_times_.back() / getTickFrequency() * 1000.0;
    double deviation = 0;

    if (gpu_times_.size() > 1)
    {
        double sum = 0;

        for (size_t i = 0; i < gpu_times_.size(); i++)
        {
            int64 diff = gpu_times_[i] - static_cast<int64>(gpu_elapsed_);
            double diff_time = diff * 1000 / getTickFrequency();
            sum += diff_time * diff_time;
        }

        deviation = std::sqrt(sum / gpu_times_.size());
    }

    printMetrics(is_accurate_, cpu_time, gpu_time, gpu_full_time, speedup, fullspeedup);
    writeMetrics(cpu_time, gpu_time, gpu_full_time, speedup, fullspeedup, gpu_min, gpu_max, deviation);

    num_subtests_called_++;
    resetCurrentSubtest();
}


double TestSystem::meanTime(const vector<int64> &samples)
{
    double sum = accumulate(samples.begin(), samples.end(), 0.);
    return sum / samples.size();
}


void TestSystem::printHeading()
{
    cout << endl;
    cout<< setiosflags(ios_base::left);

#if 0
    cout<<TAB<<setw(7)<< "Accu." << setw(10) << "CPU (ms)" << setw(10) << "GPU, ms"
        << setw(8) << "Speedup"<< setw(10)<<"GPUTotal" << setw(10) << "Total"
        << "Description\n";
    cout<<TAB<<setw(7)<<""<<setw(10)<<""<<setw(10)<<""<<setw(8)<<""<<setw(10)<<"(ms)"<<setw(10)<<"Speedup\n";
#endif

    cout<<TAB<< setw(10) << "CPU (ms)" << setw(10) << "GPU, ms"
        << setw(8) << "Speedup"<< setw(10)<<"GPUTotal" << setw(10) << "Total"
        << "Description\n";
    cout<<TAB<<setw(10)<<""<<setw(10)<<""<<setw(8)<<""<<setw(10)<<"(ms)"<<setw(10)<<"Speedup\n";

    cout << resetiosflags(ios_base::left);
}

void TestSystem::writeHeading()
{
    if (!record_)
    {
        recordname_ += "_OCL.csv";
        record_ = fopen(recordname_.c_str(), "w");
        if(record_ == NULL)
        {
            cout<<".csv file open failed.\n";
            exit(0);
        }
    }

    fprintf(record_, "NAME,DESCRIPTION,ACCURACY,DIFFERENCE,CPU (ms),GPU (ms),SPEEDUP,GPUTOTAL (ms),TOTALSPEEDUP,GPU Min (ms),GPU Max (ms), Standard deviation (ms)\n");

    fflush(record_);
}

void TestSystem::printSummary()
{
    cout << setiosflags(ios_base::fixed);
    cout << "\naverage GPU speedup: x"
        << setprecision(3) << speedup_total_ / std::max(1, num_subtests_called_)
        << endl;
    cout << "\nGPU exceeded: "
        << setprecision(3) << speedup_faster_count_
        << "\nGPU passed: "
        << setprecision(3) << speedup_equal_count_
        << "\nGPU failed: "
        << setprecision(3) << speedup_slower_count_
        << endl;
    cout << "\nGPU exceeded rate: "
        << setprecision(3) << (float)speedup_faster_count_ / std::max(1, num_subtests_called_) * 100
        << "%"
        << "\nGPU passed rate: "
        << setprecision(3) << (float)speedup_equal_count_ / std::max(1, num_subtests_called_) * 100
        << "%"
        << "\nGPU failed rate: "
        << setprecision(3) << (float)speedup_slower_count_ / std::max(1, num_subtests_called_) * 100
        << "%"
        << endl;
    cout << "\naverage GPUTOTAL speedup: x"
        << setprecision(3) << speedup_full_total_ / std::max(1, num_subtests_called_)
        << endl;
    cout << "\nGPUTOTAL exceeded: "
        << setprecision(3) << speedup_full_faster_count_
        << "\nGPUTOTAL passed: "
        << setprecision(3) << speedup_full_equal_count_
        << "\nGPUTOTAL failed: "
        << setprecision(3) << speedup_full_slower_count_
        << endl;
    cout << "\nGPUTOTAL exceeded rate: "
        << setprecision(3) << (float)speedup_full_faster_count_ / std::max(1, num_subtests_called_) * 100
        << "%"
        << "\nGPUTOTAL passed rate: "
        << setprecision(3) << (float)speedup_full_equal_count_ / std::max(1, num_subtests_called_) * 100
        << "%"
        << "\nGPUTOTAL failed rate: "
        << setprecision(3) << (float)speedup_full_slower_count_ / std::max(1, num_subtests_called_) * 100
        << "%"
        << endl;
    cout << resetiosflags(ios_base::fixed);
}


enum GTestColor {
    COLOR_DEFAULT,
    COLOR_RED,
    COLOR_GREEN,
    COLOR_YELLOW
};
#if GTEST_OS_WINDOWS&&!GTEST_OS_WINDOWS_MOBILE
// Returns the character attribute for the given color.
static WORD GetColorAttribute(GTestColor color) {
    switch (color) {
    case COLOR_RED:    return FOREGROUND_RED;
    case COLOR_GREEN:  return FOREGROUND_GREEN;
    case COLOR_YELLOW: return FOREGROUND_RED | FOREGROUND_GREEN;
    default:           return 0;
    }
}
#else
static const char* GetAnsiColorCode(GTestColor color) {
    switch (color) {
    case COLOR_RED:     return "1";
    case COLOR_GREEN:   return "2";
    case COLOR_YELLOW:  return "3";
    default:            return NULL;
    };
}
#endif

static void printMetricsUti(double cpu_time, double gpu_time, double gpu_full_time, double speedup, double fullspeedup, std::stringstream& stream, std::stringstream& cur_subtest_description)
{
    //cout <<TAB<< setw(7) << stream.str();
    cout <<TAB;

    stream.str("");
    stream << cpu_time;
    cout << setw(10) << stream.str();

    stream.str("");
    stream << gpu_time;
    cout << setw(10) << stream.str();

    stream.str("");
    stream << "x" << setprecision(3) << speedup;
    cout << setw(8) << stream.str();

    stream.str("");
    stream << gpu_full_time;
    cout << setw(10) << stream.str();

    stream.str("");
    stream << "x" << setprecision(3) << fullspeedup;
    cout << setw(10) << stream.str();

    cout << cur_subtest_description.str();
    cout << resetiosflags(ios_base::left) << endl;
}

void TestSystem::printMetrics(int is_accurate, double cpu_time, double gpu_time, double gpu_full_time, double speedup, double fullspeedup)
{
    cout << setiosflags(ios_base::left);
    stringstream stream;

    std::stringstream &cur_subtest_description = getCurSubtestDescription();

#if GTEST_OS_WINDOWS&&!GTEST_OS_WINDOWS_MOBILE

    WORD color;
    const HANDLE stdout_handle = GetStdHandle(STD_OUTPUT_HANDLE);
    // Gets the current text color.
    CONSOLE_SCREEN_BUFFER_INFO buffer_info;
    GetConsoleScreenBufferInfo(stdout_handle, &buffer_info);
    const WORD old_color_attrs = buffer_info.wAttributes;
    // We need to flush the stream buffers into the console before each
    // SetConsoleTextAttribute call lest it affect the text that is already
    // printed but has not yet reached the console.
    fflush(stdout);

    if(is_accurate == 1||is_accurate == -1)
    {
        color = old_color_attrs;
        printMetricsUti(cpu_time, gpu_time, gpu_full_time, speedup, fullspeedup, stream, cur_subtest_description);

    }else
    {
        color = GetColorAttribute(COLOR_RED);
        SetConsoleTextAttribute(stdout_handle,
            color| FOREGROUND_INTENSITY);

        printMetricsUti(cpu_time, gpu_time, gpu_full_time, speedup, fullspeedup, stream, cur_subtest_description);
        fflush(stdout);
        // Restores the text color.
        SetConsoleTextAttribute(stdout_handle, old_color_attrs);
    }
#else
    GTestColor color = COLOR_RED;
    if(is_accurate == 1|| is_accurate == -1)
    {
        printMetricsUti(cpu_time, gpu_time, gpu_full_time, speedup, fullspeedup, stream, cur_subtest_description);

    }else
    {
        printf("\033[0;3%sm", GetAnsiColorCode(color));
        printMetricsUti(cpu_time, gpu_time, gpu_full_time, speedup, fullspeedup, stream, cur_subtest_description);
        printf("\033[m");  // Resets the terminal to default.
    }
#endif
}

void TestSystem::writeMetrics(double cpu_time, double gpu_time, double gpu_full_time, double speedup, double fullspeedup, double gpu_min, double gpu_max, double std_dev)
{
    if (!record_)
    {
        recordname_ += ".csv";
        record_ = fopen(recordname_.c_str(), "w");
    }

    string _is_accurate_;

    if(is_accurate_ == 1)
        _is_accurate_ = "Pass";
    else if(is_accurate_ == 0)
        _is_accurate_ = "Fail";
    else if(is_accurate_ == -1)
        _is_accurate_ = " ";
    else
    {
        std::cout<<"is_accurate errer: "<<is_accurate_<<"\n";
        exit(-1);
    }

    fprintf(record_, "%s,%s,%s,%.2f,%.3f,%.3f,%.3f,%.3f,%.3f,%.3f,%.3f,%.3f\n",
        itname_changed_ ? itname_.c_str() : "",
        cur_subtest_description_.str().c_str(),
        _is_accurate_.c_str(),
        accurate_diff_,
        cpu_time, gpu_time, speedup, gpu_full_time, fullspeedup,
        gpu_min, gpu_max, std_dev);

    if (itname_changed_)
    {
        itname_changed_ = false;
    }

    fflush(record_);
}

void TestSystem::writeSummary()
{
    if (!record_)
    {
        recordname_ += ".csv";
        record_ = fopen(recordname_.c_str(), "w");
    }

    fprintf(record_, "\nAverage GPU speedup: %.3f\n"
        "exceeded: %d (%.3f%%)\n"
        "passed: %d (%.3f%%)\n"
        "failed: %d (%.3f%%)\n"
        "\nAverage GPUTOTAL speedup: %.3f\n"
        "exceeded: %d (%.3f%%)\n"
        "passed: %d (%.3f%%)\n"
        "failed: %d (%.3f%%)\n",
        speedup_total_ / std::max(1, num_subtests_called_),
        speedup_faster_count_, (float)speedup_faster_count_ / std::max(1, num_subtests_called_) * 100,
        speedup_equal_count_, (float)speedup_equal_count_ / std::max(1, num_subtests_called_) * 100,
        speedup_slower_count_, (float)speedup_slower_count_ / std::max(1, num_subtests_called_) * 100,
        speedup_full_total_ / std::max(1, num_subtests_called_),
        speedup_full_faster_count_, (float)speedup_full_faster_count_ / std::max(1, num_subtests_called_) * 100,
        speedup_full_equal_count_, (float)speedup_full_equal_count_ / std::max(1, num_subtests_called_) * 100,
        speedup_full_slower_count_, (float)speedup_full_slower_count_ / std::max(1, num_subtests_called_) * 100
        );
    fflush(record_);
}

void TestSystem::printError(const std::string &msg)
{
    if(msg != "CL_INVALID_BUFFER_SIZE")
    {
        cout << TAB << "[error: " << msg << "] " << cur_subtest_description_.str() << endl;
    }
}

void gen(Mat &mat, int rows, int cols, int type, Scalar low, Scalar high)
{
    mat.create(rows, cols, type);
    RNG rng(0);
    rng.fill(mat, RNG::UNIFORM, low, high);
}

string abspath(const string &relpath)
{
    return TestSystem::instance().workingDir() + relpath;
}


int CV_CDECL cvErrorCallback(int /*status*/, const char * /*func_name*/,
    const char *err_msg, const char * /*file_name*/,
    int /*line*/, void * /*userdata*/)
{
    TestSystem::instance().printError(err_msg);
    return 0;
}

double checkNorm(const Mat &m)
{
    return norm(m, NORM_INF);
}

double checkNorm(const Mat &m1, const Mat &m2)
{
    return norm(m1, m2, NORM_INF);
}

double checkSimilarity(const Mat &m1, const Mat &m2)
{
    Mat diff;
    matchTemplate(m1, m2, diff, CV_TM_CCORR_NORMED);
    return std::abs(diff.at<float>(0, 0) - 1.f);
}