// Copyright (C) 2022 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only

#include <QTest>

#include <QPainter>
#include <private/qtextimagehandler_p.h>

class tst_QTextImageHandler : public QObject
{
    Q_OBJECT

public:
    tst_QTextImageHandler();

private slots:
    void init();
    void cleanup();
    void cleanupTestCase();
    void loadAtNImages_data();
    void loadAtNImages();
};

tst_QTextImageHandler::tst_QTextImageHandler()
{
}

void tst_QTextImageHandler::init()
{
}

void tst_QTextImageHandler::cleanup()
{
}

void tst_QTextImageHandler::cleanupTestCase()
{
}

void tst_QTextImageHandler::loadAtNImages_data()
{
    QTest::addColumn<QString>("imageFile");

    QTest::addRow("file") << QFINDTESTDATA("data/image.png");
    QTest::addRow("file_url") << QUrl::fromLocalFile(QFINDTESTDATA("data/image.png")).toString();
    QTest::addRow("resource") << ":/data/image.png";
    QTest::addRow("qrc_url") << "qrc:/data/image.png";
}

void tst_QTextImageHandler::loadAtNImages()
{
    QFETCH(QString, imageFile);

    QTextDocument doc;
    QTextCursor c(&doc);
    c.insertHtml("<img src=\"" + imageFile + "\">");
    const auto formats = doc.allFormats();
    const auto it = std::find_if(formats.begin(), formats.end(), [](const auto &format){
        return format.objectType() == QTextFormat::ImageObject;
    });
    QVERIFY(it != formats.end());
    const QTextImageFormat format = (*it).toImageFormat();
    QTextImageHandler handler;

    for (const auto &dpr : {1, 2}) {
        QImage img(20, 20, QImage::Format_ARGB32_Premultiplied);
        img.fill(Qt::white);
        img.setDevicePixelRatio(dpr);
        QPainter p(&img);
        handler.drawObject(&p, QRect(0, 0, 20, 20), &doc, 0, format);
        p.end();
        QVERIFY(!img.isNull());
        const auto expectedColor = dpr == 1 ? Qt::red : Qt::green;
        QCOMPARE(img.pixelColor(0, 0), expectedColor);
    }
}

QTEST_MAIN(tst_QTextImageHandler)
#include "tst_qtextimagehandler.moc"