/*
 * Copyright (C) 2012, 2013, 2014 Canonical, Ltd.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; version 3.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */


#include "testutil.h"

#include <qpa/qwindowsysteminterface.h>
#include <QtGui/QGuiApplication>
#include <QQuickView>

// UbuntuGestures lib
#include <TouchRegistry.h>
#include <Timer.h>

using namespace UbuntuGestures;

TestUtil::TestUtil(QObject *parent)
    : QObject(parent)
    , m_targetWindow(0)
    , m_touchDevice(0)
    , m_installedTouchRegistry(false)
{
}

TestUtil::~TestUtil()
{
}

bool
TestUtil::isInstanceOf(QObject *obj, QString name)
{
    if (!obj) return false;
    bool result = obj->inherits(name.toUtf8());
    if (!result) {
        const QMetaObject *metaObject = obj->metaObject();
        while (!result && metaObject) {
            const QString className = metaObject->className();
            const QString qmlName = className.left(className.indexOf("_QMLTYPE_"));
            result = qmlName == name;
            metaObject = metaObject->superClass();
        }
    }
    return result;
}

TouchEventSequenceWrapper *TestUtil::touchEvent()
{
    ensureTargetWindow();
    ensureTouchDevice();
    ensureTouchRegistryInstalled();

    return new TouchEventSequenceWrapper(
            QTest::touchEvent(m_targetWindow, m_touchDevice, /* autoCommit */ false));
}

void TestUtil::ensureTargetWindow()
{
    if (!m_targetWindow && !QGuiApplication::topLevelWindows().isEmpty())
        m_targetWindow = QGuiApplication::topLevelWindows()[0];
}

void TestUtil::ensureTouchDevice()
{
    if (!m_touchDevice) {
        m_touchDevice = new QTouchDevice;
        m_touchDevice->setType(QTouchDevice::TouchScreen);
        QWindowSystemInterface::registerTouchDevice(m_touchDevice);
    }
}

void TestUtil::ensureTouchRegistryInstalled()
{
    if (m_installedTouchRegistry)
        return;

    TouchRegistry *touchRegistry;
    if (TouchRegistry::instance() == nullptr) {
        // Tests can be *very* slow to run and we don't want things timing out because
        // of that. So give it fake timers to use (they will never time out)
        touchRegistry = new TouchRegistry(this, new FakeTimerFactory);
    } else {
        touchRegistry = TouchRegistry::instance();
        if (touchRegistry->parent() != this) {
            // someone else created it. leave it alone
            m_installedTouchRegistry = true;
        }
    }

    ensureTargetWindow();

    if (m_targetWindow) {
        QQuickView *view = qobject_cast<QQuickView*>(m_targetWindow);
        if (view) {
            view->installEventFilter(touchRegistry);
            touchRegistry->setParent(view);
            m_installedTouchRegistry = true;
        }
    }
}