/****************************************************************************
**
** Copyright (C) 2017 Klarälvdalens Datakonsult AB, a KDAB Group company, info@kdab.com, author Tobias König <tobias.koenig@kdab.com>
** Contact: http://www.qt.io/licensing/
**
** This file is part of the QtPDF module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL3$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms
** and conditions see http://www.qt.io/terms-conditions. For further
** information use the contact form at http://www.qt.io/contact-us.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 3 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPLv3 included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 3 requirements
** will be met: https://www.gnu.org/licenses/lgpl.html.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 2.0 or later as published by the Free
** Software Foundation and appearing in the file LICENSE.GPL included in
** the packaging of this file. Please review the following information to
** ensure the GNU General Public License version 2.0 requirements will be
** met: http://www.gnu.org/licenses/gpl-2.0.html.
**
** $QT_END_LICENSE$
**
****************************************************************************/

#include <QPdfDocument>
#include <QPdfPageRenderer>

#include <QtTest/QtTest>

class tst_QPdfPageRenderer: public QObject
{
    Q_OBJECT

private slots:
    void defaultValues();
    void withNoDocument();
    void withEmptyDocument();
    void withLoadedDocumentSingleThreaded();
    void withLoadedDocumentMultiThreaded();
    void switchingRenderMode();
};

void tst_QPdfPageRenderer::defaultValues()
{
    QPdfPageRenderer pageRenderer;

    QCOMPARE(pageRenderer.document(), nullptr);
    QCOMPARE(pageRenderer.renderMode(), QPdfPageRenderer::SingleThreadedRenderMode);
}

void tst_QPdfPageRenderer::withNoDocument()
{
    QPdfPageRenderer pageRenderer;

    const QSize imageSize(100, 100);
    const quint64 requestId = pageRenderer.requestPage(0, imageSize);

    QCOMPARE(requestId, quint64(0));
}

void tst_QPdfPageRenderer::withEmptyDocument()
{
    QPdfDocument document;
    QPdfPageRenderer pageRenderer;

    pageRenderer.setDocument(&document);

    const QSize imageSize(100, 100);
    const quint64 requestId = pageRenderer.requestPage(0, imageSize);

    QCOMPARE(requestId, quint64(0));
}

void tst_QPdfPageRenderer::withLoadedDocumentSingleThreaded()
{
    QPdfDocument document;
    QPdfPageRenderer pageRenderer;
    pageRenderer.setDocument(&document);

    QCOMPARE(document.load(QFINDTESTDATA("pdf-sample.pagerenderer.pdf")), QPdfDocument::NoError);

    QSignalSpy pageRenderedSpy(&pageRenderer, &QPdfPageRenderer::pageRendered);

    const QSize imageSize(100, 100);
    const quint64 requestId = pageRenderer.requestPage(0, imageSize);

    QCOMPARE(requestId, quint64(1));
    QTRY_COMPARE(pageRenderedSpy.count(), 1);
    QCOMPARE(pageRenderedSpy[0][0].toInt(), 0);
    QCOMPARE(pageRenderedSpy[0][1].toSize(), imageSize);
    QCOMPARE(pageRenderedSpy[0][2].value<QImage>().size(), imageSize);
    QCOMPARE(pageRenderedSpy[0][4].toULongLong(), requestId);
}

void tst_QPdfPageRenderer::withLoadedDocumentMultiThreaded()
{
    QPdfDocument document;

    QPdfPageRenderer pageRenderer;
    pageRenderer.setDocument(&document);
    pageRenderer.setRenderMode(QPdfPageRenderer::MultiThreadedRenderMode);

    QCOMPARE(document.load(QFINDTESTDATA("pdf-sample.pagerenderer.pdf")), QPdfDocument::NoError);

    QSignalSpy pageRenderedSpy(&pageRenderer, &QPdfPageRenderer::pageRendered);

    const QSize imageSize(100, 100);
    const quint64 requestId = pageRenderer.requestPage(0, imageSize);

    QCOMPARE(requestId, quint64(1));
    QTRY_COMPARE(pageRenderedSpy.count(), 1);
    QCOMPARE(pageRenderedSpy[0][0].toInt(), 0);
    QCOMPARE(pageRenderedSpy[0][1].toSize(), imageSize);
    QCOMPARE(pageRenderedSpy[0][2].value<QImage>().size(), imageSize);
    QCOMPARE(pageRenderedSpy[0][4].toULongLong(), requestId);
}

void tst_QPdfPageRenderer::switchingRenderMode()
{
    QPdfDocument document;
    QPdfPageRenderer pageRenderer;
    pageRenderer.setDocument(&document);

    QCOMPARE(document.load(QFINDTESTDATA("pdf-sample.pagerenderer.pdf")), QPdfDocument::NoError);

    QSignalSpy pageRenderedSpy(&pageRenderer, &QPdfPageRenderer::pageRendered);

    // render single threaded
    const QSize imageSize(100, 100);
    const quint64 firstRequestId = pageRenderer.requestPage(0, imageSize);

    QTRY_COMPARE(pageRenderedSpy.count(), 1);
    QCOMPARE(pageRenderedSpy[0][0].toInt(), 0);
    QCOMPARE(pageRenderedSpy[0][1].toSize(), imageSize);
    QCOMPARE(pageRenderedSpy[0][2].value<QImage>().size(), imageSize);
    QCOMPARE(pageRenderedSpy[0][4].toULongLong(), firstRequestId);

    const QImage image = pageRenderedSpy[0][2].value<QImage>();

    pageRenderedSpy.clear();

    // switch to multi threaded
    pageRenderer.setRenderMode(QPdfPageRenderer::MultiThreadedRenderMode);

    const quint64 secondRequestId = pageRenderer.requestPage(0, imageSize);

    QVERIFY(firstRequestId != secondRequestId);
    QTRY_COMPARE(pageRenderedSpy.count(), 1);
    QCOMPARE(pageRenderedSpy[0][0].toInt(), 0);
    QCOMPARE(pageRenderedSpy[0][1].toSize(), imageSize);
    QCOMPARE(pageRenderedSpy[0][2].value<QImage>(), image);
    QCOMPARE(pageRenderedSpy[0][2].value<QImage>().size(), imageSize);
    QCOMPARE(pageRenderedSpy[0][4].toULongLong(), secondRequestId);

    pageRenderedSpy.clear();

    // switch back to single threaded
    pageRenderer.setRenderMode(QPdfPageRenderer::SingleThreadedRenderMode);

    const quint64 thirdRequestId = pageRenderer.requestPage(0, imageSize);

    QTRY_COMPARE(pageRenderedSpy.count(), 1);
    QCOMPARE(pageRenderedSpy[0][0].toInt(), 0);
    QCOMPARE(pageRenderedSpy[0][1].toSize(), imageSize);
    QCOMPARE(pageRenderedSpy[0][2].value<QImage>(), image);
    QCOMPARE(pageRenderedSpy[0][2].value<QImage>().size(), imageSize);
    QCOMPARE(pageRenderedSpy[0][4].toULongLong(), thirdRequestId);
}

QTEST_MAIN(tst_QPdfPageRenderer)

#include "tst_qpdfpagerenderer.moc"