#include <QtTest>
#include <QObject>
#include <QString>
#include <QScreen>
#include <QMainWindow>
#include <QWheelEvent>

#include <qcustomplot.h>

#include <SqpApplication.h>
#include <Variable/VariableController2.h>
#include <Common/cpp_utils.h>

#include <Visualization/VisualizationGraphWidget.h>
#include <TestProviders.h>
#include <GUITestUtils.h>


ALIAS_TEMPLATE_FUNCTION(isReady, static_cast<SqpApplication *>(qApp)->variableController().isReady)

std::tuple< std::unique_ptr<VisualizationGraphWidget>,
            std::shared_ptr<Variable>,
            DateTimeRange >
build_simple_graph_test()
{
    auto w = std::make_unique<VisualizationGraphWidget>();
    auto provider = std::make_shared<SimpleRange<10> >();
    auto range = DateTimeRange::fromDateTime(QDate(2018, 8, 7), QTime(14, 00), QDate(2018, 8, 7),QTime(16, 00));
    auto var = static_cast<SqpApplication *>(qApp)->variableController().createVariable("V1", {{"", "scalar"}}, provider, range);
    w->addVariable(var, range);
    while (!isReady(var))
    QCoreApplication::processEvents();
    auto cent = center(w.get());
    return {std::move(w), var, range};
}


class A_SimpleGraph : public QObject {
    Q_OBJECT
public:
    explicit A_SimpleGraph(QObject *parent = Q_NULLPTR) : QObject(parent) {}

private slots:
    void scrolls_left_with_mouse()
    {
        auto [w, var, range] = build_simple_graph_test();
        QVERIFY(prepare_gui_test(w.get()));
        auto cent = center(w.get());

        for (auto i = 0; i < 100; i++) {
            QTest::mousePress(w.get(), Qt::LeftButton, Qt::NoModifier, cent, 1);
            mouseMove(w.get(), {cent.x() + 200, cent.y()}, Qt::LeftButton);
            QTest::mouseRelease(w.get(), Qt::LeftButton);
            while (!isReady(var))
                QCoreApplication::processEvents();
        }
        while (!isReady(var))
        QCoreApplication::processEvents();
        auto r = var->range();
        /*
         * Scrolling to the left implies going back in time
         * Scroll only implies keeping the same delta T -> shit only transformation
        */
        QVERIFY(r.m_TEnd < range.m_TEnd);
        QVERIFY(SciQLop::numeric::almost_equal<double>(r.delta(),range.delta(),1));
    }

    void scrolls_right_with_mouse()
    {
        auto [w, var, range] = build_simple_graph_test();
        QVERIFY(prepare_gui_test(w.get()));
        auto cent = center(w.get());

        for (auto i = 0; i < 100; i++) {
            QTest::mousePress(w.get(), Qt::LeftButton, Qt::NoModifier, cent, 1);
            mouseMove(w.get(), {cent.x() - 200, cent.y()}, Qt::LeftButton);
            QTest::mouseRelease(w.get(), Qt::LeftButton);
            while (!isReady(var))
                QCoreApplication::processEvents();
        }
        while (!isReady(var))
            QCoreApplication::processEvents();
        auto r = var->range();
        /*
         * Scrolling to the right implies going forward in time
         * Scroll only implies keeping the same delta T -> shit only transformation
        */
        QVERIFY(r.m_TEnd > range.m_TEnd);
        QVERIFY(SciQLop::numeric::almost_equal<double>(r.delta(),range.delta(),1));
    }
};

QT_BEGIN_NAMESPACE
QTEST_ADD_GPU_BLACKLIST_SUPPORT_DEFS
QT_END_NAMESPACE
int main(int argc, char *argv[])
{
    SqpApplication app{argc, argv};
    app.setAttribute(Qt::AA_Use96Dpi, true);
    QTEST_DISABLE_KEYPAD_NAVIGATION;
    QTEST_ADD_GPU_BLACKLIST_SUPPORT;
    A_SimpleGraph tc;
    QTEST_SET_MAIN_SOURCE_PATH;
    return QTest::qExec(&tc, argc, argv);
}

#include "main.moc"