/*
    This file is part of the KDE project
    SPDX-FileCopyrightText: 2015 David Faure <faure@kde.org>

    SPDX-License-Identifier: LGPL-2.0-or-later
*/

#include <KConfigGroup>
#include <KDesktopFile>
#include <QDebug>
#include <QProcess>
#include <QTemporaryDir>
#include <QTest>
#include <kservice.h>
#include <kservicefactory_p.h>
#include <ksycoca.h>
#include <ksycoca_p.h>

// taken from tst_qstandardpaths
#if defined(Q_OS_UNIX) && !defined(Q_OS_MAC) && !defined(Q_OS_BLACKBERRY) && !defined(Q_OS_ANDROID)
#define Q_XDG_PLATFORM
#endif

class KSycocaXdgDirsTest : public QObject
{
    Q_OBJECT

private Q_SLOTS:
    void initTestCase()
    {
        QStandardPaths::setTestModeEnabled(true);

        QVERIFY(m_tempDir.isValid());
    }
    void cleanupTestCase()
    {
        QFile::remove(KSycoca::absoluteFilePath());
    }
    void testOtherAppDir();

private:
    static void runKBuildSycoca(const QProcessEnvironment &environment);

    QTemporaryDir m_tempDir;
};

QTEST_MAIN(KSycocaXdgDirsTest)

void KSycocaXdgDirsTest::runKBuildSycoca(const QProcessEnvironment &environment)
{
    QProcess proc;
    const QString kbuildsycoca = QStringLiteral(KBUILDSYCOCAEXE);
    QVERIFY(!kbuildsycoca.isEmpty());
    QStringList args;
    args << QStringLiteral("--testmode");
    // proc.setProcessChannelMode(QProcess::ForwardedChannels);
    proc.start(kbuildsycoca, args);
    proc.setProcessEnvironment(environment);

    proc.waitForFinished();
    QCOMPARE(proc.exitStatus(), QProcess::NormalExit);
}

// Ensure two apps with different XDG_DATA_DIRS/XDG_DATA_HOME don't use the same sycoca.
void KSycocaXdgDirsTest::testOtherAppDir()
{
#ifndef Q_XDG_PLATFORM
    QSKIP("This test requires XDG_DATA_DIRS");
#endif

    // KSycoca::self() represents application 1, running with one set of dirs
    KSycoca::self()->ensureCacheValid();

    // Create another xdg data dir
    const QString dataDir = m_tempDir.path();
    qputenv("XDG_DATA_DIRS", QFile::encodeName(dataDir));
    QCOMPARE(dataDir, QStandardPaths::standardLocations(QStandardPaths::GenericDataLocation).constLast());
    QVERIFY(!KService::serviceByDesktopPath(QStringLiteral("test_app_other.desktop")));

    const QString appDir = dataDir + QLatin1String{"/applications"};

    // The buildsystem copied applications.menus into bin/data/menus, so we don't rely on /etc/xdg
    const QByteArray modifiedConfigDirs = QFile::encodeName(QCoreApplication::applicationDirPath()) + "/data";
    qputenv("XDG_CONFIG_DIRS", modifiedConfigDirs);

    // test_app_other: live in a different application directory
    const QString testAppOther = appDir + QLatin1String{"/test_app_other.desktop"};
    KDesktopFile file(testAppOther);
    KConfigGroup group = file.desktopGroup();
    group.writeEntry("Type", "Application");
    group.writeEntry("Exec", "kded5");
    group.writeEntry("Name", "Test App Other");
    qDebug() << "Just created" << testAppOther;
    file.sync();

    QProcessEnvironment env = QProcessEnvironment::systemEnvironment();
    env.insert(QStringLiteral("XDG_DATA_DIRS"), dataDir);
    runKBuildSycoca(env);

#if 0 // for debugging
    const KService::List lst = KService::allServices();
    QVERIFY(!lst.isEmpty());
    for (const KService::Ptr &serv : lst) {
        qDebug() << serv->entryPath() << serv->storageId() /*<< serv->desktopEntryName()*/;
    }
#endif

    // This is still NOT available to application 1.
    // kbuildsycoca created a different DB file, the one we read from hasn't changed.
    // Changing XDG_DATA_DIRS at runtime isn't supported, so this test isn't doing what apps would do.
    // The point however is that another app using different dirs cannot mess up our DB.
    QVERIFY(!KService::serviceByStorageId(QStringLiteral("test_app_other.desktop")));

    // Check here what the application 2 would see, by creating another sycoca instance.
    KSycoca otherAppSycoca;
    // do what serviceByStorageId does:
    otherAppSycoca.ensureCacheValid();
    QVERIFY(otherAppSycoca.d->serviceFactory()->findServiceByStorageId(QStringLiteral("test_app_other.desktop")));
    QVERIFY(otherAppSycoca.d->m_databasePath != KSycoca::self()->d->m_databasePath); // check that they use a different filename
    // check that the timestamp code works
    QVERIFY(!otherAppSycoca.d->needsRebuild());
}

#include "ksycoca_xdgdirstest.moc"