// Copyright (C) 2016 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only


#include <QTest>
#include <QSignalSpy>

#include <qapplication.h>
#include <qpainter.h>
#include <qstyleoption.h>
#if QT_CONFIG(shortcut)
#  include <qkeysequence.h>
#endif
#include <qevent.h>
#include <qgridlayout.h>
#include <qabstractbutton.h>

#include <private/qguiapplication_p.h>
#include <qpa/qplatformintegration.h>
#include <qpa/qplatformtheme.h>

#include <QtWidgets/private/qapplication_p.h>

class tst_QAbstractButton : public QObject
{
    Q_OBJECT

private slots:
    void initTestCase();
    void cleanupTestCase();
    void init();

    void setAutoRepeat_data();
    void setAutoRepeat();

    void pressed();
    void released();
    void setText();
    void setIcon();

#if QT_CONFIG(shortcut)
    void setShortcut();
#endif

    void animateClick();

    void isCheckable();
    void setDown();
    void isChecked();
    void toggled();
    void setEnabled();
#if QT_CONFIG(shortcut)
    void shortcutEvents();
#endif
    void stopRepeatTimer();

    void mouseReleased(); // QTBUG-53244

    void buttonPressKeys();

protected slots:
    void onClicked();
    void onToggled( bool on );
    void onPressed();
    void onReleased();
    void resetValues();

private:
    uint click_count;
    uint toggle_count;
    uint press_count;
    uint release_count;

    QAbstractButton *testWidget;
};

// QAbstractButton is an abstract class in 4.0
class MyButton : public QAbstractButton
{
public:
    MyButton(QWidget *p = nullptr) : QAbstractButton(p) {}
    void paintEvent(QPaintEvent *) override
    {
        QPainter p(this);
        QRect r = rect();
        p.fillRect(r, isDown() ? Qt::black : (isChecked() ? Qt::lightGray : Qt::white));
        p.setPen(isDown() ? Qt::white : Qt::black);
        p.drawRect(r);
        p.drawText(r, Qt::AlignCenter | Qt::TextShowMnemonic, text());
        if (hasFocus()) {
            r.adjust(2, 2, -2, -2);
            QStyleOptionFocusRect opt;
            opt.rect = r;
            opt.palette = palette();
            opt.state = QStyle::State_None;
            style()->drawPrimitive(QStyle::PE_FrameFocusRect, &opt, &p, this);
#ifdef Q_OS_MACOS
            p.setPen(Qt::red);
            p.drawRect(r);
#endif
        }
    }
    QSize sizeHint() const override
    {
        QSize sh(8, 8);
        if (!text().isEmpty())
            sh += fontMetrics().boundingRect(text()).size();
        return sh;
    }

    void resetTimerEvents() { timerEvents = 0; }
    int timerEventCount() const { return timerEvents; }

private:

    int timerEvents;

    void timerEvent(QTimerEvent *event) override
    {
        ++timerEvents;
        QAbstractButton::timerEvent(event);
    }
};

void tst_QAbstractButton::initTestCase()
{
    testWidget = new MyButton(0);
    testWidget->setObjectName("testObject");
    testWidget->resize( 200, 200 );
    testWidget->show();

    connect( testWidget, SIGNAL(clicked()), this, SLOT(onClicked()) );
    connect( testWidget, SIGNAL(pressed()), this, SLOT(onPressed()) );
    connect( testWidget, SIGNAL(released()), this, SLOT(onReleased()) );
    connect( testWidget, SIGNAL(toggled(bool)), this, SLOT(onToggled(bool)) );
}

void tst_QAbstractButton::cleanupTestCase()
{
    delete testWidget;
}

void tst_QAbstractButton::init()
{
    testWidget->setText("Test");
    testWidget->setEnabled( true );
    testWidget->setDown( false );
    testWidget->setAutoRepeat( false );
#if QT_CONFIG(shortcut)
    QKeySequence seq;
    testWidget->setShortcut( seq );
#endif

    toggle_count = 0;
    press_count = 0;
    release_count = 0;
    click_count = 0;
}

void tst_QAbstractButton::resetValues()
{
    toggle_count = 0;
    press_count = 0;
    release_count = 0;
    click_count = 0;
}

void tst_QAbstractButton::onClicked()
{
    click_count++;
}

void tst_QAbstractButton::onToggled( bool /*on*/ )
{
    toggle_count++;
}

void tst_QAbstractButton::onPressed()
{
    press_count++;
}

void tst_QAbstractButton::onReleased()
{
    release_count++;
}

void tst_QAbstractButton::setAutoRepeat_data()
{
    QTest::addColumn<int>("mode");
    QTest::newRow("mode 0") << 0;
    QTest::newRow("mode 1") << 1;
    QTest::newRow("mode 2") << 2;
    QTest::newRow("mode 3") << 3;
    QTest::newRow("mode 4") << 4;
    QTest::newRow("mode 5") << 5;
    QTest::newRow("mode 6") << 6;
}

#define REPEAT_DELAY 1000

int test_count = 0;
int last_mode = 0;

void tst_QAbstractButton::setAutoRepeat()
{
    QFETCH( int, mode );

    //FIXME: temp code to check that the test fails consistenly
    //retest( 3 );

    switch (mode)
    {
    case 0:
        QVERIFY( !testWidget->isCheckable() );
        break;
    case 1:
        // check if we can toggle the mode
        testWidget->setAutoRepeat( true );
        QVERIFY( testWidget->autoRepeat() );

        testWidget->setAutoRepeat( false );
        QVERIFY( !testWidget->autoRepeat() );
        break;
    case 2:
        // check that the button is down if we press space and not in autorepeat
        testWidget->setDown( false );
        testWidget->setAutoRepeat( false );
        QTest::keyPress( testWidget, Qt::Key_Space );

        QTest::qWait( REPEAT_DELAY );

        QVERIFY( release_count == 0 );
        QVERIFY( testWidget->isDown() );
        QVERIFY( toggle_count == 0 );
        QVERIFY( press_count == 1 );
        QVERIFY( click_count == 0 );

        QTest::keyRelease( testWidget, Qt::Key_Space );
        QVERIFY( click_count == 1 );
        QVERIFY( release_count == 1 );
        break;
    case 3:
        // check that the button is down if we press space while in autorepeat
        testWidget->setDown(false);
        testWidget->setAutoRepeat(true);
        QTest::keyPress(testWidget, Qt::Key_Space);
        QTest::qWait(REPEAT_DELAY);
        QVERIFY(testWidget->isDown());
        QTest::keyRelease(testWidget, Qt::Key_Space);
        QCOMPARE(release_count, press_count);
        QCOMPARE(toggle_count, uint(0));
        QCOMPARE(press_count, click_count);
        QVERIFY(click_count > 1);
        break;
    case 4: {
        const auto buttonPressKeys = QGuiApplicationPrivate::platformTheme()
                                             ->themeHint(QPlatformTheme::ButtonPressKeys)
                                             .value<QList<Qt::Key>>();
        if (buttonPressKeys.contains(Qt::Key_Enter)) {
            QSKIP("platform theme has Key_Enter in ButtonPressKeys");
        }
        // check that pressing ENTER has no effect when autorepeat is false
        testWidget->setDown( false );
        testWidget->setAutoRepeat( false );
        QTest::keyPress( testWidget, Qt::Key_Enter );

        QTest::qWait( REPEAT_DELAY );

        QVERIFY( !testWidget->isDown() );
        QVERIFY( toggle_count == 0 );
        QVERIFY( press_count == 0 );
        QVERIFY( release_count == 0 );
        QVERIFY( click_count == 0 );
        QTest::keyRelease( testWidget, Qt::Key_Enter );

        QVERIFY( click_count == 0 );
        break;
    }
    case 5: {
        const auto buttonPressKeys = QGuiApplicationPrivate::platformTheme()
                                             ->themeHint(QPlatformTheme::ButtonPressKeys)
                                             .value<QList<Qt::Key>>();
        if (buttonPressKeys.contains(Qt::Key_Enter)) {
            QSKIP("platform theme has Key_Enter in ButtonPressKeys");
        }
        // check that pressing ENTER has no effect when autorepeat is true
        testWidget->setDown( false );
        testWidget->setAutoRepeat( true );
        QTest::keyPress( testWidget, Qt::Key_Enter );

        QTest::qWait( REPEAT_DELAY );

        QVERIFY( !testWidget->isDown() );
        QVERIFY( toggle_count == 0 );
        QVERIFY( press_count == 0 );
        QVERIFY( release_count == 0 );
        QVERIFY( click_count == 0 );

        QTest::keyRelease( testWidget, Qt::Key_Enter );

        QVERIFY( click_count == 0 );
        break;
    }
    case 6:
        // verify autorepeat is off by default.
        MyButton tmp( 0);
        tmp.setObjectName("tmp" );
        QVERIFY( !tmp.autoRepeat() );
        break;
    }
}

void tst_QAbstractButton::pressed()
{
    // pressed/released signals expected for a QAbstractButton
    QTest::keyPress( testWidget, ' ' );
    QCOMPARE( press_count, (uint)1 );
}

void tst_QAbstractButton::released()
{
    // pressed/released signals expected for a QAbstractButton
    QTest::keyPress( testWidget, ' ' );
    QTest::keyRelease( testWidget, ' ' );
    QCOMPARE( release_count, (uint)1 );
}

void tst_QAbstractButton::setText()
{
    testWidget->setText("");
    QCOMPARE( testWidget->text(), QString("") );
    testWidget->setText("simple");
    QCOMPARE( testWidget->text(), QString("simple") );
    testWidget->setText("&ampersand");
    QCOMPARE( testWidget->text(), QString("&ampersand") );
#if QT_CONFIG(shortcut) && !defined(Q_OS_DARWIN) // no mnemonics on Mac.
    QCOMPARE( testWidget->shortcut(), QKeySequence("ALT+A"));
#endif
    testWidget->setText("te&st");
    QCOMPARE( testWidget->text(), QString("te&st") );
#if QT_CONFIG(shortcut) && !defined(Q_OS_DARWIN) // no mnemonics on Mac.
    QCOMPARE( testWidget->shortcut(), QKeySequence("ALT+S"));
#endif
    testWidget->setText("foo");
    QCOMPARE( testWidget->text(), QString("foo") );
#if QT_CONFIG(shortcut) && !defined(Q_OS_DARWIN) // no mnemonics on Mac.
    QCOMPARE( testWidget->shortcut(), QKeySequence());
#endif
}

void tst_QAbstractButton::setIcon()
{
#if defined(Q_OS_OHOS)
    if (QGuiApplication::highDpiScaleFactorRoundingPolicy()
            == Qt::HighDpiScaleFactorRoundingPolicy::PassThrough) {
           QSKIP("DPR-sensitive setIcon test is not reliable on OHOS with PassThrough rounding.");
    }
#endif
    const char *test1_xpm[] = {
    "12 8 2 1",
    ". c None",
    "c c #ff0000",
    ".........ccc",
    "........ccc.",
    ".......ccc..",
    "ccc...ccc...",
    ".ccc.ccc....",
    "..ccccc.....",
    "...ccc......",
    "....c.......",
    };

    QPixmap p(test1_xpm);
    testWidget->setIcon( p );
    QCOMPARE( testWidget->icon().pixmap(12, 8), p );

    // Test for #14793

    const char *test2_xpm[] = {
    "12 8 2 1",
    ". c None",
    "c c #ff0000",
    "ccc......ccc",
    ".ccc....ccc.",
    "..ccc..ccc..",
    "....cc.cc...",
    ".....ccc....",
    "....cc.cc...",
    "...ccc.ccc..",
    "..ccc...ccc.",
    };

    int currentHeight = testWidget->height();
    int currentWidth = testWidget->width();

    QPixmap p2( test2_xpm );
    for ( int a = 0; a<5; a++ )
        testWidget->setIcon( p2 );

    QCOMPARE( testWidget->icon().pixmap(12, 8), p2 );

    QCOMPARE( testWidget->height(), currentHeight );
    QCOMPARE( testWidget->width(), currentWidth );
}

void tst_QAbstractButton::setEnabled()
{
    testWidget->setEnabled( false );
    QVERIFY( !testWidget->isEnabled() );
//    QTEST( testWidget, "disabled" );

    testWidget->setEnabled( true );
    QVERIFY( testWidget->isEnabled() );
//    QTEST( testWidget, "enabled" );
}

void tst_QAbstractButton::isCheckable()
{
    QVERIFY( !testWidget->isCheckable() );
}

void tst_QAbstractButton::setDown()
{
    testWidget->setDown( false );
    QVERIFY( !testWidget->isDown() );

    testWidget->setDown( true );
    QTest::qWait(300);
    QVERIFY( testWidget->isDown() );

    testWidget->setDown( true );

    // add some debugging stuff
    QWidget *grab = QWidget::keyboardGrabber();
    if (grab != 0 && grab != testWidget)
        qDebug( "testWidget != keyboardGrabber" );
    grab = qApp->focusWidget();
    if (grab != 0 && grab != testWidget)
        qDebug( "testWidget != focusWidget" );

    QTest::keyClick( testWidget, Qt::Key_Escape );
    QVERIFY( !testWidget->isDown() );
}

void tst_QAbstractButton::isChecked()
{
    testWidget->setDown( false );
    QVERIFY( !testWidget->isChecked() );

    testWidget->setDown( true );
    QVERIFY( !testWidget->isChecked() );

    testWidget->setDown( false );
    testWidget->toggle();
    QVERIFY( testWidget->isChecked() == testWidget->isCheckable() );
}

void tst_QAbstractButton::toggled()
{
    testWidget->toggle();
    QVERIFY( toggle_count == 0 );

    QTest::mousePress( testWidget, Qt::LeftButton );
    QVERIFY( toggle_count == 0 );
    QVERIFY( click_count == 0 );

    QTest::mouseRelease( testWidget, Qt::LeftButton );
    QVERIFY( click_count == 1 );

    testWidget->setCheckable(true);
    testWidget->toggle();
    testWidget->toggle();
    QCOMPARE(int(toggle_count), 2);
    testWidget->setCheckable(false);
}

#if QT_CONFIG(shortcut)
void tst_QAbstractButton::setShortcut()
{
    if (!QGuiApplicationPrivate::platformIntegration()->hasCapability(QPlatformIntegration::WindowActivation))
        QSKIP("Window activation is not supported");

    QKeySequence seq( Qt::Key_A );
    testWidget->setShortcut( seq );
    testWidget->activateWindow();
    // must be active to get shortcuts
    QVERIFY(QTest::qWaitForWindowActive(testWidget));

    QTest::keyClick( testWidget, 'A' );
    QTest::qWait(300);                      // Animate click takes time
    QCOMPARE(click_count,  (uint)1);
    QCOMPARE(press_count,  (uint)1); // Press is part of a click
    QCOMPARE(release_count,(uint)1); // Release is part of a click

    QVERIFY( toggle_count == 0 );

//     resetValues();
//     QTest::keyPress( testWidget, 'A' );
//     QTest::qWait(10000);
//     QTest::keyRelease( testWidget, 'A' );
//     QCOMPARE(click_count,  (uint)1);
//     QCOMPARE(press_count,  (uint)1);
//     QCOMPARE(release_count,(uint)1);

//     qDebug() << click_count;

}
#endif // QT_CONFIG(shortcut)

void tst_QAbstractButton::animateClick()
{
    MyButton button;
    QSignalSpy pressedSpy(&button, &QAbstractButton::pressed);
    QSignalSpy releasedSpy(&button, &QAbstractButton::released);
    QSignalSpy clickedSpy(&button, &QAbstractButton::clicked);

    QElapsedTimer elapsed;
    elapsed.start();
    button.animateClick();

    QVERIFY(button.isDown());
    QCOMPARE(pressedSpy.size(), 1);
    QCOMPARE(releasedSpy.size(), 0);
    QCOMPARE(clickedSpy.size(), 0);
    qApp->processEvents(QEventLoop::AllEvents, 10);
    // QAbstractButton starts a 100ms timer which performs the click. If it
    // took more than 100ms to get here, then the button might no longer be down.
    if (elapsed.elapsed() < 100) {
        QVERIFY(button.isDown());
        QCOMPARE(pressedSpy.size(), 1);
        QCOMPARE(releasedSpy.size(), 0);
        QCOMPARE(clickedSpy.size(), 0);
    }
    QTRY_VERIFY(!button.isDown());
    // but once the button has been clicked, it must have taken at least 100ms
    QVERIFY(elapsed.elapsed() >= 100);
    QCOMPARE(pressedSpy.size(), 1);
    QCOMPARE(releasedSpy.size(), 1);
    QCOMPARE(clickedSpy.size(), 1);
}

#if QT_CONFIG(shortcut)

void tst_QAbstractButton::shortcutEvents()
{
    MyButton button;
    QSignalSpy pressedSpy(&button, SIGNAL(pressed()));
    QSignalSpy releasedSpy(&button, SIGNAL(released()));
    QSignalSpy clickedSpy(&button, SIGNAL(clicked(bool)));

    for (int i = 0; i < 4; ++i) {
        QKeySequence sequence;
        // Default shortcutId for QAbstractButton is 0, so the shortcut event will work.
        QShortcutEvent event(sequence, /*shortcutId*/ 0);
        QApplication::sendEvent(&button, &event);
        if (i < 2)
            QTest::qWait(500);
    }

    QTest::qWait(1000); // ensure animate timer is expired

    QCOMPARE(pressedSpy.size(), 3);
    QCOMPARE(releasedSpy.size(), 3);
    QCOMPARE(clickedSpy.size(), 3);
}

#endif // QT_CONFIG(shortcut)

void tst_QAbstractButton::stopRepeatTimer()
{
    MyButton button;
    button.setAutoRepeat(true);

    // Mouse trigger case:
    button.resetTimerEvents();
    QTest::mousePress(&button, Qt::LeftButton);
    QTest::qWait(1000);
    QVERIFY(button.timerEventCount() > 0);

    QTest::mouseRelease(&button, Qt::LeftButton);
    button.resetTimerEvents();
    QTest::qWait(1000);
    QCOMPARE(button.timerEventCount(), 0);

    // Key trigger case:
    button.resetTimerEvents();
    QTest::keyPress(&button, Qt::Key_Space);
    QTest::qWait(1000);
    QVERIFY(button.timerEventCount() > 0);

    QTest::keyRelease(&button, Qt::Key_Space);
    button.resetTimerEvents();
    QTest::qWait(1000);
    QCOMPARE(button.timerEventCount(), 0);
}

void tst_QAbstractButton::mouseReleased() // QTBUG-53244
{
    MyButton button(nullptr);
    button.setObjectName("button");
    button.setGeometry(0, 0, 20, 20);
    QSignalSpy spyPress(&button, &QAbstractButton::pressed);
    QSignalSpy spyRelease(&button, &QAbstractButton::released);

    QTest::mousePress(&button, Qt::LeftButton);
    QCOMPARE(spyPress.size(), 1);
    QCOMPARE(button.isDown(), true);
    QCOMPARE(spyRelease.size(), 0);

    QTest::mouseClick(&button, Qt::RightButton);
    QCOMPARE(spyPress.size(), 1);
    QCOMPARE(button.isDown(), true);
    QCOMPARE(spyRelease.size(), 0);

    QPointF posOutOfWidget = QPointF(30, 30);
    QMouseEvent me(QEvent::MouseMove,
                   posOutOfWidget, button.mapToGlobal(posOutOfWidget),
                   Qt::NoButton, Qt::MouseButtons(Qt::LeftButton),
                   Qt::NoModifier); // mouse press and move

    qApp->sendEvent(&button, &me);
    // should emit released signal once mouse is dragging out of boundary
    QCOMPARE(spyPress.size(), 1);
    QCOMPARE(button.isDown(), false);
    QCOMPARE(spyRelease.size(), 1);
}

void tst_QAbstractButton::buttonPressKeys()
{
    const auto buttonPressKeys = QGuiApplicationPrivate::platformTheme()
                                         ->themeHint(QPlatformTheme::ButtonPressKeys)
                                         .value<QList<Qt::Key>>();
    for (uint i = 0; i < buttonPressKeys.size(); ++i) {
        QTest::keyClick(testWidget, buttonPressKeys[i]);
        QCOMPARE(click_count, i + 1);
    }
}

QTEST_MAIN(tst_QAbstractButton)
#include "tst_qabstractbutton.moc"
