// Copyright (C) 2016 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only WITH Qt-GPL-exception-1.0

#include "clangtoolsunittests.h"

#include "clangtool.h"
#include "clangtoolsdiagnostic.h"
#include "clangtoolssettings.h"

#include <coreplugin/icore.h>

#include <cppeditor/clangdiagnosticconfig.h>
#include <cppeditor/cppmodelmanager.h>
#include <cppeditor/cpptoolsreuse.h>
#include <cppeditor/cpptoolstestcase.h>

#include <projectexplorer/kitmanager.h>
#include <projectexplorer/projectexplorer.h>
#include <projectexplorer/projectexplorerconstants.h>
#include <projectexplorer/toolchain.h>
#include <projectexplorer/toolchainkitaspect.h>

#include <qtsupport/qtkitaspect.h>

#include <utils/environment.h>
#include <utils/fileutils.h>

#include <QSignalSpy>
#include <QTimer>
#include <QtTest>

using namespace CppEditor;
using namespace ProjectExplorer;
using namespace Utils;

Q_DECLARE_METATYPE(CppEditor::ClangDiagnosticConfig)

namespace ClangTools {
namespace Internal {

void ClangToolsUnitTests::initTestCase()
{
    m_kit = findOr(KitManager::kits(), nullptr, [](Kit *k) {
        if (!k->isValid())
            return false;
        if (!QtSupport::QtKitAspect::qtVersion(k))
            return false;
        const Toolchain * const toolchain = ToolchainKitAspect::cxxToolchain(k);
        if (!toolchain)
            return false;

        // Wo observe clazy failures with x86/32bit MSVC kits.
        if (toolchain->typeId() == ProjectExplorer::Constants::MSVC_TOOLCHAIN_TYPEID
            && toolchain->targetAbi().architecture() == Abi::X86Architecture
            && toolchain->targetAbi().wordWidth() != Abi::hostAbi().wordWidth()) {
            return false;
        }

        return true;
    });
    if (!m_kit)
        QSKIP("This test requires at least one valid kit with a valid Qt and a suitable toolchain.");

    if (!Core::ICore::clangExecutable(CLANG_BINDIR))
        QSKIP("No clang suitable for analyzing found");

    m_tmpDir = new Tests::TemporaryCopiedDir(":/clangtools/unit-tests");
    QVERIFY(m_tmpDir->isValid());
}

void ClangToolsUnitTests::cleanupTestCase()
{
    delete m_tmpDir;
}

static ClangDiagnosticConfig configFor(const QString &tidyChecks, const QString &clazyChecks)
{
    ClangDiagnosticConfig config;
    config.setId("Test.MyTestConfig");
    config.setDisplayName("Test");
    config.setIsReadOnly(true);
    config.setClangOptions(QStringList{QStringLiteral("-Wno-everything")});
    config.setClangTidyMode(ClangDiagnosticConfig::TidyMode::UseCustomChecks);
    const QString theTidyChecks = tidyChecks.isEmpty() ? tidyChecks : "-*," + tidyChecks;
    config.setChecks(ClangToolType::Tidy, theTidyChecks);
    config.setChecks(ClangToolType::Clazy, clazyChecks);
    return config;
}

void ClangToolsUnitTests::testProject()
{
    QFETCH(FilePath, projectFilePath);
    QFETCH(int, expectedDiagCountClangTidy);
    QFETCH(int, expectedDiagCountClazy);
    QFETCH(ClangDiagnosticConfig, diagnosticConfig);
    if (projectFilePath.contains("mingw")) {
        const auto toolchain = ToolchainKitAspect::cxxToolchain(m_kit);
        if (toolchain->typeId() != ProjectExplorer::Constants::MINGW_TOOLCHAIN_TYPEID)
            QSKIP("This test is mingw specific, does not run for other toolchains");
    }

    // Open project
    Tests::ProjectOpenerAndCloser projectManager;
    QVERIFY(projectManager.open(projectFilePath, true, m_kit));

    // Run tools
    for (ClangTool * const tool : {ClangTidyTool::instance(), ClazyTool::instance()}) {
        tool->startTool(ClangTool::FileSelectionType::AllFiles,
                        ClangToolsSettings::instance()->runSettings(),
                        diagnosticConfig);
        QSignalSpy waitForFinishedTool(tool, &ClangTool::finished);
        QVERIFY(waitForFinishedTool.wait(m_timeout));

        // Check for errors
        const QString errorText = waitForFinishedTool.takeFirst().constFirst().toString();
        const bool finishedSuccessfully = errorText.isEmpty();
        if (!finishedSuccessfully)
            qWarning("Error: %s", qPrintable(errorText));
        QVERIFY(finishedSuccessfully);
        QCOMPARE(tool->diagnostics().count(), tool == ClangTidyTool::instance()
                 ? expectedDiagCountClangTidy : expectedDiagCountClazy);
    }
}

void ClangToolsUnitTests::testProject_data()
{
    QTest::addColumn<FilePath>("projectFilePath");
    QTest::addColumn<int>("expectedDiagCountClangTidy");
    QTest::addColumn<int>("expectedDiagCountClazy");
    QTest::addColumn<ClangDiagnosticConfig>("diagnosticConfig");

    // Test simple C++ project.
    ClangDiagnosticConfig config = configFor("modernize-use-nullptr", QString());
    addTestRow("simple/simple.qbs", 1, 0, config);
    addTestRow("simple/simple.pro", 1, 0, config);

    // Test simple Qt project.
    config = configFor("readability-static-accessed-through-instance", QString());
    addTestRow("qt-widgets-app/qt-widgets-app.qbs", 1, 0, config);
    addTestRow("qt-widgets-app/qt-widgets-app.pro", 1, 0, config);

    // Test that libraries can be analyzed.
    config = configFor(QString(), QString());
    addTestRow("simple-library/simple-library.qbs", 0, 0, config);
    addTestRow("simple-library/simple-library.pro", 0, 0, config);

    // Test that standard headers can be parsed.
    addTestRow("stdc++11-includes/stdc++11-includes.qbs", 0, 0, config);
    addTestRow("stdc++11-includes/stdc++11-includes.pro", 0, 0, config);

    // Test that qt essential headers can be parsed.
    addTestRow("qt-essential-includes/qt-essential-includes.qbs", 0, 0, config);
    addTestRow("qt-essential-includes/qt-essential-includes.pro", 0, 0, config);

    // Test that mingw includes can be parsed.
    addTestRow("mingw-includes/mingw-includes.qbs", 0, 0, config);
    addTestRow("mingw-includes/mingw-includes.pro", 0, 0, config);

    // Test that tidy and clazy diagnostics are emitted for the same project.
    addTestRow("clangtidy_clazy/clangtidy_clazy.pro",
               1, 1, configFor("misc-unconventional-assign-operator", "qgetenv"));
}

void ClangToolsUnitTests::addTestRow(const QByteArray &relativeFilePath,
                                     int expectedDiagCountClangTidy,
                                     int expectedDiagCountClazy,
                                     const ClangDiagnosticConfig &diagnosticConfig)
{
    const FilePath absoluteFilePath = m_tmpDir->absolutePath(QString::fromUtf8(relativeFilePath));
    const QString fileName = absoluteFilePath.fileName();

    QTest::newRow(fileName.toUtf8().constData())
        << absoluteFilePath << expectedDiagCountClangTidy << expectedDiagCountClazy
        << diagnosticConfig;
}

int ClangToolsUnitTests::getTimeout()
{
    const int t = qtcEnvironmentVariableIntValue("QTC_CLANGTOOLS_TEST_TIMEOUT");
    return t > 0 ? t : 480000;
}

} // namespace Internal
} // namespace ClangTools