/*
   This software is in the public domain, furnished "as is", without technical
   support, and with no warranty, express or implied, as to its usefulness for
   any purpose.
*/

#include <QtTest>
#include <QTemporaryDir>

#include "common/utility.h"
#include "config.h"
#include "logger.h"

using namespace OCC::Utility;

namespace OCC {
OCSYNC_EXPORT extern bool fsCasePreserving_override;
}

class TestUtility : public QObject
{
    Q_OBJECT

private slots:
    void initTestCase()
    {
        OCC::Logger::instance()->setLogFlush(true);
        OCC::Logger::instance()->setLogDebug(true);

        QStandardPaths::setTestModeEnabled(true);
    }

    void testFormatFingerprint()
    {
        QVERIFY2(formatFingerprint("68ac906495480a3404beee4874ed853a037a7a8f")
                 == "68:ac:90:64:95:48:0a:34:04:be:ee:48:74:ed:85:3a:03:7a:7a:8f",
		"Utility::formatFingerprint() is broken");
    }
    void testOctetsToString()
    {
        QLocale::setDefault(QLocale("en"));
        QCOMPARE(octetsToString(999) , QString("999 B"));
        QCOMPARE(octetsToString(1024) , QString("1 KB"));
        QCOMPARE(octetsToString(1110) , QString("1 KB"));
        QCOMPARE(octetsToString(1364) , QString("1 KB"));

        QCOMPARE(octetsToString(9110) , QString("9 KB"));
        QCOMPARE(octetsToString(9910) , QString("10 KB"));
        QCOMPARE(octetsToString(9999) , QString("10 KB"));
        QCOMPARE(octetsToString(10240) , QString("10 KB"));

        QCOMPARE(octetsToString(123456) , QString("121 KB"));
        QCOMPARE(octetsToString(1234567) , QString("1.2 MB"));
        QCOMPARE(octetsToString(12345678) , QString("12 MB"));
        QCOMPARE(octetsToString(123456789) , QString("118 MB"));
        QCOMPARE(octetsToString(1000LL*1000*1000 * 5) , QString("4.7 GB"));

        QCOMPARE(octetsToString(1), QString("1 B"));
        QCOMPARE(octetsToString(2), QString("2 B"));
        QCOMPARE(octetsToString(1024), QString("1 KB"));
        QCOMPARE(octetsToString(1024*1024), QString("1 MB"));
        QCOMPARE(octetsToString(1024LL*1024*1024), QString("1 GB"));
        QCOMPARE(octetsToString(1024LL*1024*1024*1024), QString("1 TB"));
        QCOMPARE(octetsToString(1024LL*1024*1024*1024 * 5), QString("5 TB"));
    }

    void testLaunchOnStartup()
    {
        QString postfix = QString::number(OCC::Utility::rand());

        const QString appName = QString::fromLatin1("testLaunchOnStartup.%1").arg(postfix);
        const QString guiName = "LaunchOnStartup GUI Name";

        QVERIFY(hasLaunchOnStartup(appName) == false);
        setLaunchOnStartup(appName, guiName, true);
        QVERIFY(hasLaunchOnStartup(appName) == true);
        setLaunchOnStartup(appName, guiName, false);
        QVERIFY(hasLaunchOnStartup(appName) == false);
    }

    void testDurationToDescriptiveString()
    {
        QLocale::setDefault(QLocale("C"));
        //NOTE: in order for the plural to work we would need to load the english translation

        quint64 sec = 1000;
        quint64 hour = 3600 * sec;

        QDateTime current = QDateTime::currentDateTimeUtc();

        QCOMPARE(durationToDescriptiveString2(0), QString("0 second(s)") );
        QCOMPARE(durationToDescriptiveString2(5), QString("0 second(s)") );
        QCOMPARE(durationToDescriptiveString2(1000), QString("1 second(s)") );
        QCOMPARE(durationToDescriptiveString2(1005), QString("1 second(s)") );
        QCOMPARE(durationToDescriptiveString2(56123), QString("56 second(s)") );
        QCOMPARE(durationToDescriptiveString2(90*sec), QString("1 minute(s) 30 second(s)") );
        QCOMPARE(durationToDescriptiveString2(3*hour), QString("3 hour(s)") );
        QCOMPARE(durationToDescriptiveString2(3*hour + 20*sec), QString("3 hour(s)") );
        QCOMPARE(durationToDescriptiveString2(3*hour + 70*sec), QString("3 hour(s) 1 minute(s)") );
        QCOMPARE(durationToDescriptiveString2(3*hour + 100*sec), QString("3 hour(s) 2 minute(s)") );
        QCOMPARE(durationToDescriptiveString2(current.msecsTo(current.addYears(4).addMonths(5).addDays(2).addSecs(23*60*60))),
                 QString("4 year(s) 5 month(s)") );
        QCOMPARE(durationToDescriptiveString2(current.msecsTo(current.addDays(2).addSecs(23*60*60))),
                 QString("2 day(s) 23 hour(s)") );

        QCOMPARE(durationToDescriptiveString1(0), QString("0 second(s)") );
        QCOMPARE(durationToDescriptiveString1(5), QString("0 second(s)") );
        QCOMPARE(durationToDescriptiveString1(1000), QString("1 second(s)") );
        QCOMPARE(durationToDescriptiveString1(1005), QString("1 second(s)") );
        QCOMPARE(durationToDescriptiveString1(56123), QString("56 second(s)") );
        QCOMPARE(durationToDescriptiveString1(90*sec), QString("2 minute(s)") );
        QCOMPARE(durationToDescriptiveString1(3*hour), QString("3 hour(s)") );
        QCOMPARE(durationToDescriptiveString1(3*hour + 20*sec), QString("3 hour(s)") );
        QCOMPARE(durationToDescriptiveString1(3*hour + 70*sec), QString("3 hour(s)") );
        QCOMPARE(durationToDescriptiveString1(3*hour + 100*sec), QString("3 hour(s)") );
        QCOMPARE(durationToDescriptiveString1(current.msecsTo(current.addYears(4).addMonths(5).addDays(2).addSecs(23*60*60))),
                 QString("4 year(s)") );
        QCOMPARE(durationToDescriptiveString1(current.msecsTo(current.addDays(2).addSecs(23*60*60))),
                 QString("3 day(s)") );

    }

    void testVersionOfInstalledBinary()
    {
        if (isLinux()) {
            // pass the cmd client from our build dir
            // this is a bit inaccurate as it does not test the "real thing"
            // but cmd and gui have the same --version handler by now
            // and cmd works without X in CI
            QString ver = versionOfInstalledBinary(QStringLiteral(OWNCLOUD_BIN_PATH  "/" APPLICATION_EXECUTABLE "cmd"));
            qDebug() << "Version of installed Nextcloud: " << ver;
            QVERIFY(!ver.isEmpty());

            const QRegularExpression rx(QRegularExpression::anchoredPattern(APPLICATION_SHORTNAME R"( version \d+\.\d+\.\d+.*)"));
            QVERIFY(rx.match(ver).hasMatch());
        } else {
            QVERIFY(versionOfInstalledBinary().isEmpty());
        }
    }

    void testTimeAgo()
    {
        // Both times in same timezone
        QDateTime d1 = QDateTime::fromString("2015-01-24T09:20:30+01:00", Qt::ISODate);
        QDateTime d2 = QDateTime::fromString("2015-01-23T09:20:30+01:00", Qt::ISODate);
        QString s = timeAgoInWords(d2, d1);
        QCOMPARE(s, QLatin1String("1d"));

        // Different timezones
        QDateTime earlyTS = QDateTime::fromString("2015-01-24T09:20:30+01:00", Qt::ISODate);
        QDateTime laterTS = QDateTime::fromString("2015-01-24T09:20:30-01:00", Qt::ISODate);
        s = timeAgoInWords(earlyTS, laterTS);
        QCOMPARE(s, QLatin1String("2h"));

        // 'Now' in whatever timezone
        earlyTS = QDateTime::currentDateTime();
        laterTS = earlyTS;
        s = timeAgoInWords(earlyTS, laterTS );
        QCOMPARE(s, QLatin1String("now"));

        earlyTS = earlyTS.addSecs(-6);
        s = timeAgoInWords(earlyTS, laterTS );
        QCOMPARE(s, QLatin1String("1m"));
    }

    void testFsCasePreserving()
    {
        QVERIFY(isMac() || isWindows() ? fsCasePreserving() : ! fsCasePreserving());
        QScopedValueRollback<bool> scope(OCC::fsCasePreserving_override);
        OCC::fsCasePreserving_override = true;
        QVERIFY(fsCasePreserving());
        OCC::fsCasePreserving_override = false;
        QVERIFY(! fsCasePreserving());
    }

    void testFileNamesEqual()
    {
        QTemporaryDir dir;
        QVERIFY(dir.isValid());
        QDir dir2(dir.path());
        QVERIFY(dir2.mkpath("test"));
        if( !fsCasePreserving() ) {
        QVERIFY(dir2.mkpath("TEST"));
        }
        QVERIFY(dir2.mkpath("test/TESTI"));
        QVERIFY(dir2.mkpath("TESTI"));

        QString a = dir.path();
        QString b = dir.path();

        QVERIFY(fileNamesEqual(a, b));

        QVERIFY(fileNamesEqual(a+"/test", b+"/test")); // both exist
        QVERIFY(fileNamesEqual(a+"/test/TESTI", b+"/test/../test/TESTI")); // both exist

        QScopedValueRollback<bool> scope(OCC::fsCasePreserving_override, true);
        QVERIFY(fileNamesEqual(a+"/test", b+"/TEST")); // both exist

        QVERIFY(!fileNamesEqual(a+"/test", b+"/test/TESTI")); // both are different

        dir.remove();
    }

    void testSanitizeForFileName_data()
    {
        QTest::addColumn<QString>("input");
        QTest::addColumn<QString>("output");

        QTest::newRow("")
            << "foobar"
            << "foobar";
        QTest::newRow("")
            << "a/b?c<d>e\\f:g*h|i\"j"
            << "abcdefghij";
        QTest::newRow("")
            << QString::fromLatin1("a\x01 b\x1f c\x80 d\x9f")
            << "a b c d";
    }

    void testSanitizeForFileName()
    {
        QFETCH(QString, input);
        QFETCH(QString, output);
        QCOMPARE(sanitizeForFileName(input), output);
    }

    void testNormalizeEtag()
    {
        QByteArray str;

#define CHECK_NORMALIZE_ETAG(TEST, EXPECT) \
    str = OCC::Utility::normalizeEtag(TEST); \
    QCOMPARE(str.constData(), EXPECT); \

        CHECK_NORMALIZE_ETAG("foo", "foo");
        CHECK_NORMALIZE_ETAG("\"foo\"", "foo");
        CHECK_NORMALIZE_ETAG("\"nar123\"", "nar123");
        CHECK_NORMALIZE_ETAG("", "");
        CHECK_NORMALIZE_ETAG("\"\"", "");

        /* Test with -gzip (all combinaison) */
        CHECK_NORMALIZE_ETAG("foo-gzip", "foo");
        CHECK_NORMALIZE_ETAG("\"foo\"-gzip", "foo");
        CHECK_NORMALIZE_ETAG("\"foo-gzip\"", "foo");
    }

    void testIsPathWindowsDrivePartitionRoot()
    {
#ifdef Q_OS_WIN
        // a non-root of a Windows partition
        QVERIFY(!isPathWindowsDrivePartitionRoot("c:/a"));
        QVERIFY(!isPathWindowsDrivePartitionRoot("c:\\a"));

        // a root of a Windows partition (c, d, e)
        QVERIFY(isPathWindowsDrivePartitionRoot("c:"));
        QVERIFY(isPathWindowsDrivePartitionRoot("c:/"));
        QVERIFY(isPathWindowsDrivePartitionRoot("c:\\"));

        QVERIFY(isPathWindowsDrivePartitionRoot("d:"));
        QVERIFY(isPathWindowsDrivePartitionRoot("d:/"));
        QVERIFY(isPathWindowsDrivePartitionRoot("d:\\"));

        QVERIFY(isPathWindowsDrivePartitionRoot("e:"));
        QVERIFY(isPathWindowsDrivePartitionRoot("e:/"));
        QVERIFY(isPathWindowsDrivePartitionRoot("e:\\"));

        // a single character
        QVERIFY(!isPathWindowsDrivePartitionRoot("a"));

        // a missing second character
        QVERIFY(!isPathWindowsDrivePartitionRoot("c/"));
        QVERIFY(!isPathWindowsDrivePartitionRoot("c\\"));

        // an incorrect second character
        QVERIFY(!isPathWindowsDrivePartitionRoot("c;"));
        QVERIFY(!isPathWindowsDrivePartitionRoot("c;/"));
        QVERIFY(!isPathWindowsDrivePartitionRoot("c;\\"));

        // a non-missing, but, incorrect last character
        QVERIFY(!isPathWindowsDrivePartitionRoot("c:!"));

        // an incorrect path length
        QVERIFY(!isPathWindowsDrivePartitionRoot("cd:"));
        QVERIFY(!isPathWindowsDrivePartitionRoot("cd:/"));
        QVERIFY(!isPathWindowsDrivePartitionRoot("cd:\\"));

        // a non-alphabetic first character
        QVERIFY(!isPathWindowsDrivePartitionRoot("0:"));
        QVERIFY(!isPathWindowsDrivePartitionRoot("0:/"));
        QVERIFY(!isPathWindowsDrivePartitionRoot("0:\\"));
#else
        // should always return false on non-Windows
        QVERIFY(!isPathWindowsDrivePartitionRoot("c:"));
        QVERIFY(!isPathWindowsDrivePartitionRoot("c:/"));
        QVERIFY(!isPathWindowsDrivePartitionRoot("c:\\"));
#endif
    }

    void testFullRemotePathToRemoteSyncRootRelative()
    {
        QVector<QPair<QString, QString>> remoteFullPathsForRoot = {
            {"2020", {"2020"}},
            {"/2021/", {"2021"}},
            {"/2022/file.docx", {"2022/file.docx"}}
        };
        // test against root remote path - result must stay unchanged, leading and trailing slashes must get removed
        for (const auto &remoteFullPathForRoot : remoteFullPathsForRoot) {
            const auto fullRemotePathOriginal = remoteFullPathForRoot.first;
            const auto fullRemotePathExpected = remoteFullPathForRoot.second;
            const auto fullRepotePathResult = OCC::Utility::fullRemotePathToRemoteSyncRootRelative(fullRemotePathOriginal, "/");
            QCOMPARE(fullRepotePathResult, fullRemotePathExpected);
        }

        const auto remotePathNonRoot = QStringLiteral("/Documents/reports");
        QVector<QPair<QString, QString>> remoteFullPathsForNonRoot = {
            {remotePathNonRoot + "/" + "2020", {"2020"}},
            {remotePathNonRoot + "/" + "2021/", {"2021"}},
            {remotePathNonRoot + "/" + "2022/file.docx", {"2022/file.docx"}}
        };

        // test against non-root remote path - must always return a proper path as in local db
        for (const auto &remoteFullPathForNonRoot : remoteFullPathsForNonRoot) {
            const auto fullRemotePathOriginal = remoteFullPathForNonRoot.first;
            const auto fullRemotePathExpected = remoteFullPathForNonRoot.second;
            const auto fullRepotePathResult = OCC::Utility::fullRemotePathToRemoteSyncRootRelative(fullRemotePathOriginal, remotePathNonRoot);
            QCOMPARE(fullRepotePathResult, fullRemotePathExpected);
        }

        // test against non-root remote path with trailing slash - must work the same
        const auto remotePathNonRootWithTrailingSlash = QStringLiteral("/Documents/reports/");
        for (const auto &remoteFullPathForNonRoot : remoteFullPathsForNonRoot) {
            const auto fullRemotePathOriginal = remoteFullPathForNonRoot.first;
            const auto fullRemotePathExpected = remoteFullPathForNonRoot.second;
            const auto fullRepotePathResult = OCC::Utility::fullRemotePathToRemoteSyncRootRelative(fullRemotePathOriginal, remotePathNonRootWithTrailingSlash);
            QCOMPARE(fullRepotePathResult, fullRemotePathExpected);
        }

        // test against unrelated remote path - result must stay unchanged
        const auto remotePathUnrelated = QStringLiteral("/Documents1/reports");
        for (const auto &remoteFullPathForNonRoot : remoteFullPathsForNonRoot) {
            const auto fullRemotePathOriginal = remoteFullPathForNonRoot.first;
            const auto fullRepotePathResult = OCC::Utility::fullRemotePathToRemoteSyncRootRelative(fullRemotePathOriginal, remotePathUnrelated);
            QCOMPARE(fullRepotePathResult, fullRemotePathOriginal);
        }
    }
};

QTEST_GUILESS_MAIN(TestUtility)
#include "testutility.moc"