/* ============================================================
 *
 * This file is a part of digiKam project
 * https://www.digikam.org
 *
 * Date        : 2012-12-31
 * Description : time adjust actions using threads.
 *
 * SPDX-FileCopyrightText: 2012      by Smit Mehta <smit dot meh at gmail dot com>
 * SPDX-FileCopyrightText: 2006-2026 by Gilles Caulier <caulier dot gilles at gmail dot com>
 * SPDX-FileCopyrightText: 2018-2021 by Maik Qualmann <metzpinguin at gmail dot com>
 *
 * SPDX-License-Identifier: GPL-2.0-or-later
 *
 * ============================================================ */

#include "timeadjusttask.h"

// Qt includes

#include <QFile>
#include <QScopedPointer>
#include <qplatformdefs.h>

// Local includes

#include "digikam_debug.h"
#include "digikam_globals.h"
#include "dmetadata.h"
#include "dinfointerface.h"
#include "dfileoperations.h"
#include "exiftoolparser.h"
#include "timeadjustlist.h"
#include "metaenginesettings.h"

namespace DigikamGenericTimeAdjustPlugin
{

class Q_DECL_HIDDEN TimeAdjustTask::Private
{
public:

    Private() = default;

    TimeAdjustContainer   settings;     ///< Settings from GUI.

    TimeAdjustThread*     thread = nullptr;

    QUrl                  url;
};

TimeAdjustTask::TimeAdjustTask(const QUrl& url, TimeAdjustThread* const thread)
    : ActionJob(),
      d        (new Private)
{
    d->url    = url;
    d->thread = thread;
}

TimeAdjustTask::~TimeAdjustTask()
{
    cancel();

    delete d;
}

void TimeAdjustTask::setSettings(const TimeAdjustContainer& settings)
{
    d->settings = settings;
}

void TimeAdjustTask::run()
{
    ActionJob::run();       // To customize thread name

    if (m_cancel)
    {
        return;
    }

    Q_EMIT signalProcessStarted(d->url);

    int status             = TimeAdjustList::NOPROCESS_ERROR;
    QDateTime org          = d->thread->readTimestamp(d->url);
    QDateTime adj          = asDateTimeLocal(d->settings.calculateAdjustedDate(org, d->thread->indexForUrl(d->url)));
    bool writeToSidecar    = (MetaEngineSettings::instance()->settings()
                              .metadataWritingMode != DMetadata::WRITE_TO_FILE_ONLY);
    bool writeWithExifTool = (MetaEngineSettings::instance()->settings().writeWithExifTool);

    if (!adj.isValid())
    {
        Q_EMIT signalProcessEnded(d->url, org, adj, TimeAdjustList::META_TIME_ERROR);
        Q_EMIT signalDone();

        return;
    }

    if (m_cancel)
    {
        return;
    }

    if (d->settings.enableExifTool && d->settings.updUseExifTool)
    {
        QScopedPointer<ExifToolParser> const parser(new ExifToolParser(nullptr));

        if (parser->exifToolAvailable())
        {
/*
            QScopedPointer<DMetadata> qmeta(new DMetadata);

            if (qmeta->load(d->url.toLocalFile(), true))
            {
                QString qDate = qmeta->getXmpTagString("Xmp.video.DateTimeOriginal");

                if (qDate.endsWith(QLatin1Char('Z')))
                {
                    adj = asDateTimeUTC(adj);
                }
            }
*/
            if (!parser->changeTimestamps(d->url.toLocalFile(), adj))
            {
                status |= TimeAdjustList::EXIF_TOOL_ERROR;
                status |= TimeAdjustList::META_TIME_ERROR;
            }
        }
        else
        {
            status |= TimeAdjustList::EXIF_TOOL_ERROR;
            status |= TimeAdjustList::META_TIME_ERROR;
        }
    }
    else
    {
        bool metadataChanged       = false;
        QString xmpDateTimeFormat  = QLatin1String("yyyy-MM-ddThh:mm:ss");
        QString exifDateTimeFormat = QLatin1String("yyyy:MM:dd hh:mm:ss");

        const QMap<QString, bool>& tagsMap = d->settings.getDateTimeTagsMap();
        QMap<QString, bool>::const_iterator it;

        QScopedPointer<DMetadata> meta(new DMetadata);

        if (meta->load(d->url.toLocalFile()))
        {
            for (it = tagsMap.constBegin() ; it != tagsMap.constEnd() ; ++it)
            {
                if (!it.value())
                {
                    continue;
                }

                bool ret = true;

                if      (
                         it.key().startsWith(QLatin1String("Exif.")) &&
                         (meta->canWriteExif(d->url.toLocalFile())   ||
                          writeWithExifTool                          ||
                          writeToSidecar)
                        )
                {
                    if (
                        !d->settings.updIfAvailable ||
                        !meta->getExifTagString(it.key().toLatin1().constData()).isEmpty()
                       )
                    {
                        ret &= meta->setExifTagString(it.key().toLatin1().constData(),
                                                      adj.toString(exifDateTimeFormat));

                        metadataChanged = true;
                    }
                }
                else if (
                         it.key().startsWith(QLatin1String("Iptc.")) &&
                         (
                          meta->canWriteIptc(d->url.toLocalFile())   ||
                          writeWithExifTool                          ||
                          writeToSidecar
                         )
                        )
                {
                    if (
                        !d->settings.updIfAvailable ||
                        !meta->getIptcTagString(it.key().toLatin1().constData()).isEmpty()
                       )
                    {
                        if      (it.key().contains(QLatin1String("Date")))
                        {
                            ret &= meta->setIptcTagString(it.key().toLatin1().constData(),
                                                          adj.date().toString(Qt::ISODate));

                            metadataChanged = true;
                        }
                        else if (it.key().contains(QLatin1String("Time")))
                        {
                            ret &= meta->setIptcTagString(it.key().toLatin1().constData(),
                                                          adj.time().toString(Qt::ISODate));

                            metadataChanged = true;
                        }
                    }
                }
                else if (
                         it.key().startsWith(QLatin1String("Xmp.")) &&
                         (
                          meta->canWriteXmp(d->url.toLocalFile())   ||
                          writeWithExifTool                         ||
                          writeToSidecar
                         )
                        )
                {
                    if (
                        !d->settings.updIfAvailable ||
                        !meta->getXmpTagString(it.key().toLatin1().constData()).isEmpty()
                       )
                    {
                        ret &= meta->setXmpTagString(it.key().toLatin1().constData(),
                                                     adj.toString(xmpDateTimeFormat));

                        metadataChanged = true;
                    }
                }

                if (!ret)
                {
                    qCDebug(DIGIKAM_DPLUGIN_GENERIC_LOG) << "Failed to set metadata for tag" << it.key();

                    status |= TimeAdjustList::META_TIME_ERROR;

                    break;
                }
            }

            if ((status == TimeAdjustList::NOPROCESS_ERROR) && metadataChanged)
            {
                if (!meta->save(d->url.toLocalFile()))
                {
                    qCDebug(DIGIKAM_DPLUGIN_GENERIC_LOG) << "Failed to update metadata in file" << d->url.fileName();

                    status |= TimeAdjustList::META_TIME_ERROR;
                }
            }
        }
        else
        {
            qCDebug(DIGIKAM_DPLUGIN_GENERIC_LOG) << "Failed to load metadata from file" << d->url.fileName();

            status |= TimeAdjustList::META_TIME_ERROR;
        }
    }

    if (d->settings.updFileModDate)
    {
        if (!DFileOperations::setModificationTime(d->url.toLocalFile(), adj))
        {
            status |= TimeAdjustList::FILE_TIME_ERROR;
        }
    }

    if (d->settings.updFileModDate && writeToSidecar && DMetadata::hasSidecar(d->url.toLocalFile()))
    {
        if (!DFileOperations::setModificationTime(DMetadata::sidecarPath(d->url.toLocalFile()), adj))
        {
            status |= TimeAdjustList::FILE_TIME_ERROR;
        }
    }

    if ((status & TimeAdjustList::META_TIME_ERROR) != TimeAdjustList::META_TIME_ERROR)
    {
        Q_EMIT signalDateTimeForUrl(d->url, adj, d->settings.updFileModDate);
    }

    Q_EMIT signalProcessEnded(d->url, org, adj, status);
    Q_EMIT signalDone();
}

// ------------------------------------------------------------------

class Q_DECL_HIDDEN TimePreviewTask::Private
{
public:

    Private() = default;

    TimeAdjustContainer   settings;     ///< Settings from GUI.

    TimeAdjustThread*     thread    = nullptr;

    QUrl                  url;
};

TimePreviewTask::TimePreviewTask(const QUrl& url, TimeAdjustThread* const thread)
    : ActionJob(),
      d        (new Private)
{
    d->url    = url;
    d->thread = thread;
}

TimePreviewTask::~TimePreviewTask()
{
    cancel();
    delete d;
}

void TimePreviewTask::setSettings(const TimeAdjustContainer& settings)
{
    d->settings = settings;
}

void TimePreviewTask::run()
{
    ActionJob::run();       // To customize thread name

    if (m_cancel)
    {
        return;
    }

    QDateTime org = d->thread->readTimestamp(d->url);
    QDateTime adj = d->settings.calculateAdjustedDate(org, d->thread->indexForUrl(d->url));

    Q_EMIT signalPreviewReady(d->url, org, adj);
    Q_EMIT signalDone();
}

} // namespace DigikamGenericTimeAdjustPlugin

#include "moc_timeadjusttask.cpp"
