/****************************************************************************
**
** Copyright (C) 2016 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of Qt Creator.
**
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
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** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3 as published by the Free Software
** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
** included in the packaging of this file. Please review the following
** information to ensure the GNU General Public License requirements will
** be met: https://www.gnu.org/licenses/gpl-3.0.html.
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****************************************************************************/

#include "qttestoutputreader.h"
#include "qttestresult.h"

#include <utils/qtcassert.h>

#include <QDir>
#include <QFileInfo>
#include <QRegExp>

namespace Autotest {
namespace Internal {

static QString decode(const QString& original)
{
    QString result(original);
    static QRegExp regex(QLatin1String("&#((x[0-9A-F]+)|([0-9]+));"), Qt::CaseInsensitive);
    regex.setMinimal(true);

    int pos = 0;
    while ((pos = regex.indexIn(original, pos)) != -1) {
        const QString value = regex.cap(1);
        if (value.startsWith(QLatin1Char('x')))
            result.replace(regex.cap(0), QChar(value.midRef(1).toInt(0, 16)));
        else
            result.replace(regex.cap(0), QChar(value.toInt(0, 10)));
        pos += regex.matchedLength();
    }

    return result;
}

// adapted from qplaintestlogger.cpp
static QString formatResult(double value)
{
    //NAN is not supported with visual studio 2010
    if (value < 0)// || value == NAN)
        return QLatin1String("NAN");
    if (value == 0)
        return QLatin1String("0");

    int significantDigits = 0;
    qreal divisor = 1;

    while (value / divisor >= 1) {
        divisor *= 10;
        ++significantDigits;
    }

    QString beforeDecimalPoint = QString::number(value, 'f', 0);
    QString afterDecimalPoint = QString::number(value, 'f', 20);
    afterDecimalPoint.remove(0, beforeDecimalPoint.count() + 1);

    const int beforeUse = qMin(beforeDecimalPoint.count(), significantDigits);
    const int beforeRemove = beforeDecimalPoint.count() - beforeUse;

    beforeDecimalPoint.chop(beforeRemove);
    for (int i = 0; i < beforeRemove; ++i)
        beforeDecimalPoint.append(QLatin1Char('0'));

    int afterUse = significantDigits - beforeUse;
    if (beforeDecimalPoint == QLatin1String("0") && !afterDecimalPoint.isEmpty()) {
        ++afterUse;
        int i = 0;
        while (i < afterDecimalPoint.count() && afterDecimalPoint.at(i) == QLatin1Char('0'))
            ++i;
        afterUse += i;
    }

    const int afterRemove = afterDecimalPoint.count() - afterUse;
    afterDecimalPoint.chop(afterRemove);

    QString result = beforeDecimalPoint;
    if (afterUse > 0)
        result.append(QLatin1Char('.'));
    result += afterDecimalPoint;

    return result;
}

static QString constructBenchmarkInformation(const QString &metric, double value, int iterations)
{
    QString metricsText;
    if (metric == QLatin1String("WalltimeMilliseconds"))         // default
        metricsText = QLatin1String("msecs");
    else if (metric == QLatin1String("CPUTicks"))                // -tickcounter
        metricsText = QLatin1String("CPU ticks");
    else if (metric == QLatin1String("Events"))                  // -eventcounter
        metricsText = QLatin1String("events");
    else if (metric == QLatin1String("InstructionReads"))        // -callgrind
        metricsText = QLatin1String("instruction reads");
    else if (metric == QLatin1String("CPUCycles"))               // -perf
        metricsText = QLatin1String("CPU cycles");
    return QtTestOutputReader::tr("%1 %2 per iteration (total: %3, iterations: %4)")
            .arg(formatResult(value))
            .arg(metricsText)
            .arg(formatResult(value * (double)iterations))
            .arg(iterations);
}

static QString constructSourceFilePath(const QString &path, const QString &filePath)
{
    return QFileInfo(path, filePath).canonicalFilePath();
}

QtTestOutputReader::QtTestOutputReader(const QFutureInterface<TestResultPtr> &futureInterface,
                                       QProcess *testApplication, const QString &buildDirectory)
    : TestOutputReader(futureInterface, testApplication, buildDirectory)
{
}

void QtTestOutputReader::processOutput(const QByteArray &outputLine)
{
    static QStringList validEndTags = { QStringLiteral("Incident"),
                                        QStringLiteral("Message"),
                                        QStringLiteral("BenchmarkResult"),
                                        QStringLiteral("QtVersion"),
                                        QStringLiteral("QtBuild"),
                                        QStringLiteral("QTestVersion") };

    m_xmlReader.addData(outputLine);
    while (!m_xmlReader.atEnd()) {
        if (m_futureInterface.isCanceled())
            return;
        QXmlStreamReader::TokenType token = m_xmlReader.readNext();
        switch (token) {
        case QXmlStreamReader::StartDocument:
            m_className.clear();
            break;
        case QXmlStreamReader::EndDocument:
            m_xmlReader.clear();
            return;
        case QXmlStreamReader::StartElement: {
            const QString currentTag = m_xmlReader.name().toString();
            if (currentTag == QStringLiteral("TestCase")) {
                m_className = m_xmlReader.attributes().value(QStringLiteral("name")).toString();
                QTC_ASSERT(!m_className.isEmpty(), continue);
                TestResultPtr testResult = TestResultPtr(new QtTestResult(m_className));
                testResult->setResult(Result::MessageTestCaseStart);
                testResult->setDescription(tr("Executing test case %1").arg(m_className));
                m_futureInterface.reportResult(testResult);
            } else if (currentTag == QStringLiteral("TestFunction")) {
                m_testCase = m_xmlReader.attributes().value(QStringLiteral("name")).toString();
                QTC_ASSERT(!m_testCase.isEmpty(), continue);
                TestResultPtr testResult = TestResultPtr(new QtTestResult());
                testResult->setResult(Result::MessageCurrentTest);
                testResult->setDescription(tr("Entering test function %1::%2").arg(m_className,
                                                                                   m_testCase));
                m_futureInterface.reportResult(testResult);
            } else if (currentTag == QStringLiteral("Duration")) {
                m_duration = m_xmlReader.attributes().value(QStringLiteral("msecs")).toString();
                QTC_ASSERT(!m_duration.isEmpty(), continue);
            } else if (currentTag == QStringLiteral("Message")
                       || currentTag == QStringLiteral("Incident")) {
                m_dataTag.clear();
                m_description.clear();
                m_duration.clear();
                m_file.clear();
                m_result = Result::Invalid;
                m_lineNumber = 0;
                const QXmlStreamAttributes &attributes = m_xmlReader.attributes();
                m_result = TestResult::resultFromString(
                            attributes.value(QStringLiteral("type")).toString());
                m_file = decode(attributes.value(QStringLiteral("file")).toString());
                if (!m_file.isEmpty()) {
                    m_file = constructSourceFilePath(m_buildDir, m_file);
                }
                m_lineNumber = attributes.value(QStringLiteral("line")).toInt();
            } else if (currentTag == QStringLiteral("BenchmarkResult")) {
                const QXmlStreamAttributes &attributes = m_xmlReader.attributes();
                const QString metric = attributes.value(QStringLiteral("metrics")).toString();
                const double value = attributes.value(QStringLiteral("value")).toDouble();
                const int iterations = attributes.value(QStringLiteral("iterations")).toInt();
                m_description = constructBenchmarkInformation(metric, value, iterations);
                m_result = Result::Benchmark;
            } else if (currentTag == QStringLiteral("DataTag")) {
                m_cdataMode = DataTag;
            } else if (currentTag == QStringLiteral("Description")) {
                m_cdataMode = Description;
            } else if (currentTag == QStringLiteral("QtVersion")) {
                m_result = Result::MessageInternal;
                m_cdataMode = QtVersion;
            } else if (currentTag == QStringLiteral("QtBuild")) {
                m_result = Result::MessageInternal;
                m_cdataMode = QtBuild;
            } else if (currentTag == QStringLiteral("QTestVersion")) {
                m_result = Result::MessageInternal;
                m_cdataMode = QTestVersion;
            }
            break;
        }
        case QXmlStreamReader::Characters: {
            QStringRef text = m_xmlReader.text().trimmed();
            if (text.isEmpty())
                break;

            switch (m_cdataMode) {
            case DataTag:
                m_dataTag = text.toString();
                break;
            case Description:
                if (!m_description.isEmpty())
                    m_description.append(QLatin1Char('\n'));
                m_description.append(text);
                break;
            case QtVersion:
                m_description = tr("Qt version: %1").arg(text.toString());
                break;
            case QtBuild:
                m_description = tr("Qt build: %1").arg(text.toString());
                break;
            case QTestVersion:
                m_description = tr("QTest version: %1").arg(text.toString());
                break;
            default:
                // this must come from plain printf() calls - but this will be ignored anyhow
                qWarning() << "AutoTest.Run: Ignored plain output:" << text.toString();
                break;
            }
            break;
        }
        case QXmlStreamReader::EndElement: {
            m_cdataMode = None;
            const QStringRef currentTag = m_xmlReader.name();
            if (currentTag == QStringLiteral("TestFunction")) {
                if (!m_duration.isEmpty()) {
                    QtTestResult *testResult = new QtTestResult(m_className);
                    testResult->setFunctionName(m_testCase);
                    testResult->setResult(Result::MessageInternal);
                    testResult->setDescription(tr("Execution took %1 ms.").arg(m_duration));
                    m_futureInterface.reportResult(TestResultPtr(testResult));
                }
                m_futureInterface.setProgressValue(m_futureInterface.progressValue() + 1);
            } else if (currentTag == QStringLiteral("TestCase")) {
                QtTestResult *testResult = new QtTestResult(m_className);
                testResult->setResult(Result::MessageTestCaseEnd);
                testResult->setDescription(
                            m_duration.isEmpty() ? tr("Test finished.")
                                                 : tr("Test execution took %1 ms.").arg(m_duration));
                m_futureInterface.reportResult(TestResultPtr(testResult));
            } else if (validEndTags.contains(currentTag.toString())) {
                QtTestResult *testResult = new QtTestResult(m_className);
                testResult->setFunctionName(m_testCase);
                testResult->setDataTag(m_dataTag);
                testResult->setResult(m_result);
                testResult->setFileName(m_file);
                testResult->setLine(m_lineNumber);
                testResult->setDescription(m_description);
                m_futureInterface.reportResult(TestResultPtr(testResult));
            }
            break;
        }
        default:
            break;
        }
    }
}

} // namespace Internal
} // namespace Autotest