/*
 * Copyright (c) 2017 ARM Limited.
 *
 * SPDX-License-Identifier: MIT
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to
 * deal in the Software without restriction, including without limitation the
 * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
 * sell copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in all
 * copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */
#include "JSONPrinter.h"

#include "../Framework.h"
#include "../instruments/Measurement.h"

#include <algorithm>

namespace arm_compute
{
namespace test
{
namespace framework
{
void JSONPrinter::print_separator(bool &flag)
{
    if(flag)
    {
        flag = false;
    }
    else
    {
        *_stream << ",";
    }
}

void JSONPrinter::print_entry(const std::string &name, const std::string &value)
{
    print_separator(_first_entry);

    *_stream << R"(")" << name << R"(" : ")" << value << R"(")";
}

void JSONPrinter::print_global_header()
{
    *_stream << "{";
}

void JSONPrinter::print_global_footer()
{
    *_stream << "}\n";
}

void JSONPrinter::print_run_header()
{
    print_separator(_first_entry);

    *_stream << R"("tests" : {)";
}

void JSONPrinter::print_run_footer()
{
    *_stream << "}";
}

void JSONPrinter::print_test_header(const TestInfo &info)
{
    print_separator(_first_test);

    _first_test_entry = true;
    *_stream << R"(")" << info.name << R"(" : {)";
}

void JSONPrinter::print_test_footer()
{
    *_stream << "}";
}

void JSONPrinter::print_errors_header()
{
    print_separator(_first_test_entry);

    _first_error = true;
    *_stream << R"("errors" : [)";
}

void JSONPrinter::print_errors_footer()
{
    *_stream << "]";
}

void JSONPrinter::print_error(const std::exception &error)
{
    std::stringstream error_log;
    error_log.str(error.what());

    for(std::string line; !std::getline(error_log, line).fail();)
    {
        print_separator(_first_error);

        *_stream << R"(")" << line << R"(")";
    }
}

void JSONPrinter::print_info(const std::string &info)
{
    std::istringstream iss(info);
    for(std::string line; !std::getline(iss, line).fail();)
    {
        print_separator(_first_error);
        *_stream << R"(")" << line << R"(")";
    }
}

void JSONPrinter::print_measurements(const Profiler::MeasurementsMap &measurements)
{
    print_separator(_first_test_entry);

    *_stream << R"("measurements" : {)";

    for(auto i_it = measurements.cbegin(), i_end = measurements.cend(); i_it != i_end;)
    {
        *_stream << R"(")" << i_it->first << R"(" : {)";

        auto add_measurements = [](double a, const Measurement & b)
        {
            return a + b.value;
        };

        auto cmp_measurements = [](const Measurement & a, const Measurement & b)
        {
            return a.value < b.value;
        };

        double     sum_values    = std::accumulate(i_it->second.cbegin(), i_it->second.cend(), 0., add_measurements);
        int        num_values    = i_it->second.size();
        const auto minmax_values = std::minmax_element(i_it->second.begin(), i_it->second.end(), cmp_measurements);

        if(num_values > 2)
        {
            sum_values -= minmax_values.first->value + minmax_values.second->value;
            num_values -= 2;
        }

        auto measurement_to_string = [](const Measurement & measurement)
        {
            return support::cpp11::to_string(measurement.value);
        };

        *_stream << R"("avg" : )" << (sum_values / num_values) << ",";
        *_stream << R"("min" : )" << minmax_values.first->value << ",";
        *_stream << R"("max" : )" << minmax_values.second->value << ",";
        *_stream << R"("raw" : [)" << join(i_it->second.begin(), i_it->second.end(), ",", measurement_to_string) << "],";
        *_stream << R"("unit" : ")" << minmax_values.first->unit << R"(")";
        *_stream << "}";

        if(++i_it != i_end)
        {
            *_stream << ",";
        }
    }

    *_stream << "}";
}
} // namespace framework
} // namespace test
} // namespace arm_compute