/* This file is part of KDE
    Copyright (c) 2006, 2008 David Faure <faure@kde.org>

    This library is free software; you can redistribute it and/or
    modify it under the terms of the GNU Library General Public
    License as published by the Free Software Foundation; either
    version 2 of the License, or (at your option) any later version.

    This library is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
    Library General Public License for more details.

    You should have received a copy of the GNU Library General Public License
    along with this library; see the file COPYING.LIB.  If not, write to
    the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
    Boston, MA 02110-1301, USA.
*/

#include <qtest.h>

#include "fileundomanagertest.h"
#include <QSignalSpy>
#include <QDateTime>
#include <QDir>
#include <QFileInfo>
#include <qplatformdefs.h>
#include <kio/fileundomanager.h>

#include <kio/copyjob.h>
#include <kio/job.h>
#include <kio/deletejob.h>
#include <kio/paste.h>
#include <kprotocolinfo.h>
#include <kurlmimedata.h>

#include <QDebug>
#include <kconfig.h>
#include <kconfiggroup.h>

#include <errno.h>
#include <time.h>
#ifdef Q_OS_WIN
#include <sys/utime.h>
#else
#include <utime.h>
#include <sys/time.h>
#endif


#include <QClipboard>
#include <QApplication>
#include <QMimeData>

QTEST_MAIN(FileUndoManagerTest)

using namespace KIO;

static QString homeTmpDir()
{
    return QStandardPaths::writableLocation(QStandardPaths::DataLocation) + '/';
}
static QString destDir()
{
    return homeTmpDir() + "destdir/";
}

static QString srcFile()
{
    return homeTmpDir() + "testfile";
}
static QString destFile()
{
    return destDir() + "testfile";
}

#ifndef Q_OS_WIN
static QString srcLink()
{
    return homeTmpDir() + "symlink";
}
static QString destLink()
{
    return destDir() + "symlink";
}
#endif

static QString srcSubDir()
{
    return homeTmpDir() + "subdir";
}
static QString destSubDir()
{
    return destDir() + "subdir";
}

static QList<QUrl> sourceList()
{
    QList<QUrl> lst;
    lst << QUrl::fromLocalFile(srcFile());
#ifndef Q_OS_WIN
    lst << QUrl::fromLocalFile(srcLink());
#endif
    return lst;
}

static void createTestFile(const QString &path, const char *contents)
{
    QFile f(path);
    if (!f.open(QIODevice::WriteOnly)) {
        qFatal("Couldn't create %s", qPrintable(path));
    }
    f.write(QByteArray(contents));
    f.close();
}

static void createTestSymlink(const QString &path)
{
    // Create symlink if it doesn't exist yet
    QT_STATBUF buf;
    if (QT_LSTAT(QFile::encodeName(path).constData(), &buf) != 0) {
        bool ok = symlink("/IDontExist", QFile::encodeName(path).constData()) == 0; // broken symlink
        if (!ok) {
            qFatal("couldn't create symlink: %s", strerror(errno));
        }
        QVERIFY(QT_LSTAT(QFile::encodeName(path).constData(), &buf) == 0);
        QVERIFY((buf.st_mode & QT_STAT_MASK) == QT_STAT_LNK);
    } else {
        QVERIFY((buf.st_mode & QT_STAT_MASK) == QT_STAT_LNK);
    }
    qDebug("symlink %s created", qPrintable(path));
    QVERIFY(QFileInfo(path).isSymLink());
}

static void checkTestDirectory(const QString &path)
{
    QVERIFY(QFileInfo(path).isDir());
    QVERIFY(QFileInfo(path + "/fileindir").isFile());
#ifndef Q_OS_WIN
    QVERIFY(QFileInfo(path + "/testlink").isSymLink());
#endif
    QVERIFY(QFileInfo(path + "/dirindir").isDir());
    QVERIFY(QFileInfo(path + "/dirindir/nested").isFile());
}

static void createTestDirectory(const QString &path)
{
    QDir dir;
    bool ok = dir.mkdir(path);
    if (!ok) {
        qFatal("couldn't create %s", qPrintable(path));
    }
    createTestFile(path + "/fileindir", "File in dir");
#ifndef Q_OS_WIN
    createTestSymlink(path + "/testlink");
#endif
    ok = dir.mkdir(path + "/dirindir");
    if (!ok) {
        qFatal("couldn't create %s", qPrintable(path));
    }
    createTestFile(path + "/dirindir/nested", "Nested");
    checkTestDirectory(path);
}

class TestUiInterface : public FileUndoManager::UiInterface
{
public:
    TestUiInterface() : FileUndoManager::UiInterface(), m_nextReplyToConfirmDeletion(true)
    {
        setShowProgressInfo(false);
    }
    virtual void jobError(KIO::Job *job)
    {
        qFatal("%s", qPrintable(job->errorString()));
    }
    virtual bool copiedFileWasModified(const QUrl &src, const QUrl &dest, const QDateTime &srcTime, const QDateTime &destTime)
    {
        Q_UNUSED(src);
        m_dest = dest;
        Q_UNUSED(srcTime);
        Q_UNUSED(destTime);
        return true;
    }
    virtual bool confirmDeletion(const QList<QUrl> &files)
    {
        m_files = files;
        return m_nextReplyToConfirmDeletion;
    }
    void setNextReplyToConfirmDeletion(bool b)
    {
        m_nextReplyToConfirmDeletion = b;
    }
    QList<QUrl> files() const
    {
        return m_files;
    }
    QUrl dest() const
    {
        return m_dest;
    }
    void clear()
    {
        m_dest = QUrl();
        m_files.clear();
    }
private:
    bool m_nextReplyToConfirmDeletion;
    QUrl m_dest;
    QList<QUrl> m_files;
};

void FileUndoManagerTest::initTestCase()
{
    qDebug("initTestCase");

    // TODO: needs QStandardPaths::isTestModeEnabled() in ksycoca.cpp when launching kbuildsycoca
    //QStandardPaths::enableTestMode(true);

    // Get kio_trash to share our environment so that it writes trashrc to the right kdehome
    qputenv("KDE_FORK_SLAVES", "yes");

    // Start with a clean base dir
    cleanupTestCase();

    QDir dir; // TT: why not a static method?
    if (!QFile::exists(homeTmpDir())) {
        bool ok = dir.mkdir(homeTmpDir());
        if (!ok) {
            qFatal("Couldn't create %s", qPrintable(homeTmpDir()));
        }
    }

    createTestFile(srcFile(), "Hello world");
#ifndef Q_OS_WIN
    createTestSymlink(srcLink());
#endif
    createTestDirectory(srcSubDir());

    QDir().mkdir(destDir());
    QVERIFY(QFileInfo(destDir()).isDir());

    QVERIFY(!FileUndoManager::self()->undoAvailable());
    m_uiInterface = new TestUiInterface; // owned by FileUndoManager
    FileUndoManager::self()->setUiInterface(m_uiInterface);
}

void FileUndoManagerTest::cleanupTestCase()
{
    KIO::Job *job = KIO::del(QUrl::fromLocalFile(homeTmpDir()), KIO::HideProgressInfo);
    job->exec();
}

void FileUndoManagerTest::doUndo()
{
    QEventLoop eventLoop;
    bool ok = connect(FileUndoManager::self(), SIGNAL(undoJobFinished()),
                      &eventLoop, SLOT(quit()));
    QVERIFY(ok);

    FileUndoManager::self()->undo();
    eventLoop.exec(QEventLoop::ExcludeUserInputEvents); // wait for undo job to finish
}

void FileUndoManagerTest::testCopyFiles()
{
    qDebug();
    // Initially inspired from JobTest::copyFileToSamePartition()
    const QString destdir = destDir();
    QList<QUrl> lst = sourceList();
    const QUrl d = QUrl::fromLocalFile(destdir);
    KIO::CopyJob *job = KIO::copy(lst, d, KIO::HideProgressInfo);
    job->setUiDelegate(0);
    FileUndoManager::self()->recordCopyJob(job);

    QSignalSpy spyUndoAvailable(FileUndoManager::self(), SIGNAL(undoAvailable(bool)));
    QVERIFY(spyUndoAvailable.isValid());
    QSignalSpy spyTextChanged(FileUndoManager::self(), SIGNAL(undoTextChanged(QString)));
    QVERIFY(spyTextChanged.isValid());

    bool ok = job->exec();
    QVERIFY(ok);

    QVERIFY(QFile::exists(destFile()));
#ifndef Q_OS_WIN
    // Don't use QFile::exists, it's a broken symlink...
    QVERIFY(QFileInfo(destLink()).isSymLink());
#endif

    // might have to wait for dbus signal here... but this is currently disabled.
    //QTest::qWait( 20 );
    QVERIFY(FileUndoManager::self()->undoAvailable());
    QCOMPARE(spyUndoAvailable.count(), 1);
    QCOMPARE(spyTextChanged.count(), 1);
    m_uiInterface->clear();

    m_uiInterface->setNextReplyToConfirmDeletion(false);   // act like the user didn't confirm
    FileUndoManager::self()->undo();
    QCOMPARE(m_uiInterface->files().count(), 1);   // confirmDeletion was called
    QCOMPARE(m_uiInterface->files()[0].toString(), QUrl::fromLocalFile(destFile()).toString());
    QVERIFY(QFile::exists(destFile()));     // nothing happened yet

    // OK, now do it
    m_uiInterface->clear();
    m_uiInterface->setNextReplyToConfirmDeletion(true);
    doUndo();

    QVERIFY(!FileUndoManager::self()->undoAvailable());
    QVERIFY(spyUndoAvailable.count() >= 2);   // it's in fact 3, due to lock/unlock emitting it as well
    QCOMPARE(spyTextChanged.count(), 2);
    QCOMPARE(m_uiInterface->files().count(), 1);   // confirmDeletion was called
    QCOMPARE(m_uiInterface->files()[0].toString(), QUrl::fromLocalFile(destFile()).toString());

    // Check that undo worked
    QVERIFY(!QFile::exists(destFile()));
#ifndef Q_OS_WIN
    QVERIFY(!QFile::exists(destLink()));
    QVERIFY(!QFileInfo(destLink()).isSymLink());
#endif
}

void FileUndoManagerTest::testMoveFiles()
{
    qDebug();
    const QString destdir = destDir();
    QList<QUrl> lst = sourceList();
    const QUrl d = QUrl::fromLocalFile(destdir);
    KIO::CopyJob *job = KIO::move(lst, d, KIO::HideProgressInfo);
    job->setUiDelegate(0);
    FileUndoManager::self()->recordCopyJob(job);

    bool ok = job->exec();
    QVERIFY(ok);

    QVERIFY(!QFile::exists(srcFile()));     // the source moved
    QVERIFY(QFile::exists(destFile()));
#ifndef Q_OS_WIN
    QVERIFY(!QFileInfo(srcLink()).isSymLink());
    // Don't use QFile::exists, it's a broken symlink...
    QVERIFY(QFileInfo(destLink()).isSymLink());
#endif

    doUndo();

    QVERIFY(QFile::exists(srcFile()));     // the source is back
    QVERIFY(!QFile::exists(destFile()));
#ifndef Q_OS_WIN
    QVERIFY(QFileInfo(srcLink()).isSymLink());
    QVERIFY(!QFileInfo(destLink()).isSymLink());
#endif
}

// Testing for overwrite isn't possible, because non-interactive jobs never overwrite.
// And nothing different happens anyway, the dest is removed...
#if 0
void FileUndoManagerTest::testCopyFilesOverwrite()
{
    qDebug();
    // Create a different file in the destdir
    createTestFile(destFile(), "An old file already in the destdir");

    testCopyFiles();
}
#endif

void FileUndoManagerTest::testCopyDirectory()
{
    const QString destdir = destDir();
    QList<QUrl> lst; lst << QUrl::fromLocalFile(srcSubDir());
    const QUrl d = QUrl::fromLocalFile(destdir);
    KIO::CopyJob *job = KIO::copy(lst, d, KIO::HideProgressInfo);
    job->setUiDelegate(0);
    FileUndoManager::self()->recordCopyJob(job);

    bool ok = job->exec();
    QVERIFY(ok);

    checkTestDirectory(srcSubDir());   // src untouched
    checkTestDirectory(destSubDir());

    doUndo();

    checkTestDirectory(srcSubDir());
    QVERIFY(!QFile::exists(destSubDir()));
}

void FileUndoManagerTest::testMoveDirectory()
{
    const QString destdir = destDir();
    QList<QUrl> lst; lst << QUrl::fromLocalFile(srcSubDir());
    const QUrl d = QUrl::fromLocalFile(destdir);
    KIO::CopyJob *job = KIO::move(lst, d, KIO::HideProgressInfo);
    job->setUiDelegate(0);
    FileUndoManager::self()->recordCopyJob(job);

    bool ok = job->exec();
    QVERIFY(ok);

    QVERIFY(!QFile::exists(srcSubDir()));
    checkTestDirectory(destSubDir());

    doUndo();

    checkTestDirectory(srcSubDir());
    QVERIFY(!QFile::exists(destSubDir()));
}

void FileUndoManagerTest::testRenameFile()
{
    const QUrl oldUrl = QUrl::fromLocalFile(srcFile());
    const QUrl newUrl = QUrl::fromLocalFile(srcFile() + ".new");
    QList<QUrl> lst;
    lst.append(oldUrl);
    QSignalSpy spyUndoAvailable(FileUndoManager::self(), SIGNAL(undoAvailable(bool)));
    QVERIFY(spyUndoAvailable.isValid());
    KIO::Job *job = KIO::moveAs(oldUrl, newUrl, KIO::HideProgressInfo);
    job->setUiDelegate(0);
    FileUndoManager::self()->recordJob(FileUndoManager::Rename, lst, newUrl, job);

    bool ok = job->exec();
    QVERIFY(ok);

    QVERIFY(!QFile::exists(srcFile()));
    QVERIFY(QFileInfo(newUrl.toLocalFile()).isFile());
    QCOMPARE(spyUndoAvailable.count(), 1);

    doUndo();

    QVERIFY(QFile::exists(srcFile()));
    QVERIFY(!QFileInfo(newUrl.toLocalFile()).isFile());
}

void FileUndoManagerTest::testRenameDir()
{
    const QUrl oldUrl = QUrl::fromLocalFile(srcSubDir());
    const QUrl newUrl = QUrl::fromLocalFile(srcSubDir() + ".new");
    QList<QUrl> lst;
    lst.append(oldUrl);
    KIO::Job *job = KIO::moveAs(oldUrl, newUrl, KIO::HideProgressInfo);
    job->setUiDelegate(0);
    FileUndoManager::self()->recordJob(FileUndoManager::Rename, lst, newUrl, job);

    bool ok = job->exec();
    QVERIFY(ok);

    QVERIFY(!QFile::exists(srcSubDir()));
    QVERIFY(QFileInfo(newUrl.toLocalFile()).isDir());

    doUndo();

    QVERIFY(QFile::exists(srcSubDir()));
    QVERIFY(!QFileInfo(newUrl.toLocalFile()).isDir());
}

void FileUndoManagerTest::testCreateDir()
{
    const QUrl url = QUrl::fromLocalFile(srcSubDir() + ".mkdir");
    const QString path = url.toLocalFile();
    QVERIFY(!QFile::exists(path));

    KIO::SimpleJob *job = KIO::mkdir(url);
    job->setUiDelegate(0);
    FileUndoManager::self()->recordJob(FileUndoManager::Mkdir, QList<QUrl>(), url, job);
    bool ok = job->exec();
    QVERIFY(ok);
    QVERIFY(QFile::exists(path));
    QVERIFY(QFileInfo(path).isDir());

    m_uiInterface->clear();
    m_uiInterface->setNextReplyToConfirmDeletion(false);   // act like the user didn't confirm
    FileUndoManager::self()->undo();
    QCOMPARE(m_uiInterface->files().count(), 1);   // confirmDeletion was called
    QCOMPARE(m_uiInterface->files()[0].toString(), url.toString());
    QVERIFY(QFile::exists(path));   // nothing happened yet

    // OK, now do it
    m_uiInterface->clear();
    m_uiInterface->setNextReplyToConfirmDeletion(true);
    doUndo();

    QVERIFY(!QFile::exists(path));
}

void FileUndoManagerTest::testTrashFiles()
{
    if (!KProtocolInfo::isKnownProtocol("trash")) {
        QSKIP("kio_trash not installed");
    }

    // Trash it all at once: the file, the symlink, the subdir.
    QList<QUrl> lst = sourceList();
    lst.append(QUrl::fromLocalFile(srcSubDir()));
    KIO::Job *job = KIO::trash(lst, KIO::HideProgressInfo);
    job->setUiDelegate(0);
    FileUndoManager::self()->recordJob(FileUndoManager::Trash, lst, QUrl("trash:/"), job);

    bool ok = job->exec();
    QVERIFY(ok);

    // Check that things got removed
    QVERIFY(!QFile::exists(srcFile()));
#ifndef Q_OS_WIN
    QVERIFY(!QFileInfo(srcLink()).isSymLink());
#endif
    QVERIFY(!QFile::exists(srcSubDir()));

    // check trash?
    // Let's just check that it's not empty. kio_trash has its own unit tests anyway.
    KConfig cfg("trashrc", KConfig::SimpleConfig);
    QVERIFY(cfg.hasGroup("Status"));
    QCOMPARE(cfg.group("Status").readEntry("Empty", true), false);

    doUndo();

    QVERIFY(QFile::exists(srcFile()));
#ifndef Q_OS_WIN
    QVERIFY(QFileInfo(srcLink()).isSymLink());
#endif
    QVERIFY(QFile::exists(srcSubDir()));

    // We can't check that the trash is empty; other partitions might have their own trash
}

static void setTimeStamp(const QString &path)
{
#ifdef Q_OS_UNIX
    // Put timestamp in the past so that we can check that the
    // copy actually preserves it.
    struct timeval tp;
    gettimeofday(&tp, 0);
    struct utimbuf utbuf;
    utbuf.actime = tp.tv_sec + 30; // 30 seconds in the future
    utbuf.modtime = tp.tv_sec + 60; // 60 second in the future
    utime(QFile::encodeName(path).constData(), &utbuf);
    qDebug("Time changed for %s", qPrintable(path));
#endif
}

void FileUndoManagerTest::testModifyFileBeforeUndo()
{
    // based on testCopyDirectory (so that we check that it works for files in subdirs too)
    const QString destdir = destDir();
    QList<QUrl> lst; lst << QUrl::fromLocalFile(srcSubDir());
    const QUrl d = QUrl::fromLocalFile(destdir);
    KIO::CopyJob *job = KIO::copy(lst, d, KIO::HideProgressInfo);
    job->setUiDelegate(0);
    FileUndoManager::self()->recordCopyJob(job);

    bool ok = job->exec();
    QVERIFY(ok);

    checkTestDirectory(srcSubDir());   // src untouched
    checkTestDirectory(destSubDir());
    const QString destFile =  destSubDir() + "/fileindir";
    setTimeStamp(destFile);   // simulate a modification of the file

    doUndo();

    // Check that TestUiInterface::copiedFileWasModified got called
    QCOMPARE(m_uiInterface->dest().toLocalFile(), destFile);

    checkTestDirectory(srcSubDir());
    QVERIFY(!QFile::exists(destSubDir()));
}

void FileUndoManagerTest::testPasteClipboardUndo()
{
    const QList<QUrl> urls(sourceList());
    QMimeData *mimeData = new QMimeData();
    mimeData->setUrls(urls);
    mimeData->setData(QLatin1String("application/x-kde-cutselection"), "1");
    QClipboard *clipboard = QApplication::clipboard();
    clipboard->setMimeData(mimeData);

    // Paste the contents of the clipboard and check its status
    QUrl destDirUrl = QUrl::fromLocalFile(destDir());
    KIO::CopyJob *job = qobject_cast<KIO::CopyJob *>(KIO::pasteClipboard(destDirUrl, 0, true));
    QVERIFY(job);
    FileUndoManager::self()->recordCopyJob(job);
    QVERIFY(job->exec());

    // Check if the clipboard was updated after paste operation
    QList<QUrl> urls2;
    Q_FOREACH (const QUrl &url, urls) {
        QUrl dUrl = destDirUrl.adjusted(QUrl::StripTrailingSlash);
        dUrl.setPath(dUrl.path() + '/' + url.fileName());
        urls2 << dUrl;
    }
    QList<QUrl> clipboardUrls = KUrlMimeData::urlsFromMimeData(clipboard->mimeData());
    QCOMPARE(clipboardUrls, urls2);

    // Check if the clipboard was updated after undo operation
    doUndo();
    clipboardUrls = KUrlMimeData::urlsFromMimeData(clipboard->mimeData());
    QCOMPARE(clipboardUrls, urls);
}

// TODO: add test (and fix bug) for  DND of remote urls / "Link here" (creates .desktop files) // Undo (doesn't do anything)
// TODO: add test for interrupting a moving operation and then using Undo - bug:91579
