// SPDX-FileCopyrightText: 2003 Dominique Devriese <devriese@kde.org>

// SPDX-License-Identifier: GPL-2.0-or-later

#include "exporter.h"

#include "asyexporter.h"
#include "imageexporteroptions.h"
#include "latexexporter.h"
#include "svgexporter.h"
#include "xfigexporter.h"

#include "../kig/kig_document.h"
#include "../kig/kig_part.h"
#include "../kig/kig_view.h"
#include "../misc/common.h"
#include "../misc/kigfiledialog.h"
#include "../misc/kigpainter.h"

#include <QImageWriter>
#include <QMimeDatabase>
#include <QStandardPaths>

#include <KActionCollection>
#include <KActionMenu>
#include <KIconEngine>
#include <KMessageBox>

ExporterAction::ExporterAction(const KigPart *doc, KigWidget *w, KActionCollection *parent, KigExporter *exp)
    : QAction(exp->menuEntryName(), parent)
    , mexp(exp)
    , mdoc(doc)
    , mw(w)
{
    QString iconstr = exp->menuIcon();
    if (!iconstr.isEmpty())
        setIcon(QIcon(new KIconEngine(iconstr, const_cast<KigPart *>(doc)->iconLoader())));
    connect(this, &QAction::triggered, this, &ExporterAction::slotActivated);
    if (parent)
        parent->addAction(QStringLiteral("action"), this);
}

void ExporterAction::slotActivated()
{
    mexp->run(*mdoc, *mw);
}

KigExporter::~KigExporter()
{
}

ImageExporter::~ImageExporter()
{
}

QString ImageExporter::exportToStatement() const
{
    return i18n("&Export to image");
}

QString ImageExporter::menuEntryName() const
{
    return i18n("&Image...");
}

QString ImageExporter::menuIcon() const
{
    return QStringLiteral("image-x-generic");
}

void ImageExporter::run(const KigPart &doc, KigWidget &w)
{
    KigFileDialog *kfd = new KigFileDialog(QStandardPaths::writableLocation(QStandardPaths::PicturesLocation), QString(), i18n("Export as Image"), &w);
    const QList<QByteArray> mimeFilters = QImageWriter::supportedMimeTypes();
    QStringList mimeFiltersConverted;
    // Since someone didn't get the memo about what's the type of a mime name.
    for (const auto &mimeFilter : mimeFilters) {
        mimeFiltersConverted.append(QString::fromUtf8(mimeFilter));
    }
    kfd->setMimeTypeFilters(mimeFiltersConverted);
    kfd->setOptionCaption(i18n("Image Options"));
    ImageExporterOptions *opts = new ImageExporterOptions(nullptr);
    kfd->setOptionsWidget(opts);
    opts->setImageSize(w.size());
    opts->setGrid(doc.document().grid());
    opts->setAxes(doc.document().axes());
    if (!kfd->exec())
        return;

    QString filename = kfd->selectedFile();
    bool showgrid = opts->showGrid();
    bool showaxes = opts->showAxes();
    QSize imgsize = opts->imageSize();

    delete opts;
    delete kfd;

    QMimeDatabase db;
    QMimeType mimeType = db.mimeTypeForFile(filename);
    qDebug() << "mimetype: " << mimeType.name();
    if (!QImageWriter::supportedMimeTypes().contains(mimeType.name().toUtf8())) {
        KMessageBox::error(&w, i18n("Sorry, this file format is not supported."));
        return;
    };

    QFile file(filename);
    if (!file.open(QIODevice::WriteOnly)) {
        KMessageBox::error(&w, i18n("The file \"%1\" could not be opened. Please check if the file permissions are set correctly.", filename));
        return;
    };

    QPixmap img(imgsize);
    img.fill(Qt::white);
    KigPainter p(ScreenInfo(w.screenInfo().shownRect(), img.rect()), &img, doc.document());
    p.setWholeWinOverlay();
    p.drawGrid(doc.document().coordinateSystem(), showgrid, showaxes);
    // FIXME: show the selections ?
    p.drawObjects(doc.document().objects(), false);
    const QStringList types = mimeType.suffixes();
    if (types.isEmpty())
        return; // TODO error dialog?
    if (!img.save(filename, types.at(0).toLatin1())) {
        KMessageBox::error(&w, i18n("Sorry, something went wrong while saving to image \"%1\"", filename));
    }
}

KigExportManager::KigExportManager()
{
    mexporters.push_back(new ImageExporter);
    mexporters.push_back(new XFigExporter);
    mexporters.push_back(new LatexExporter);
    mexporters.push_back(new AsyExporter);
    mexporters.push_back(new SVGExporter);
}

KigExportManager::~KigExportManager()
{
    for (uint i = 0; i < mexporters.size(); ++i)
        delete mexporters[i];
}

void KigExportManager::addMenuAction(const KigPart *doc, KigWidget *w, KActionCollection *coll)
{
    KActionMenu *m = new KActionMenu(i18n("&Export To"), w);
    m->setIcon(QIcon(new KIconEngine("document-export", const_cast<KigPart *>(doc)->iconLoader())));
    for (uint i = 0; i < mexporters.size(); ++i)
        m->addAction(new ExporterAction(doc, w, coll, mexporters[i]));
    if (coll)
        coll->addAction(QStringLiteral("file_export"), m);
}

KigExportManager *KigExportManager::instance()
{
    static KigExportManager m;
    return &m;
}

#include "moc_exporter.cpp"
