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

#include <QComboBox>
#include <QDataWidgetMapper>
#include <QLineEdit>
#include <QMetaType>
#include <QStandardItemModel>
#include <QSignalSpy>
#include <QTest>
#include <QTextEdit>
#include <QVBoxLayout>

#include <QtWidgets/private/qapplication_p.h>

class tst_QDataWidgetMapper: public QObject
{
    Q_OBJECT
private slots:
    void initTestCase();

    void setModel();
    void navigate();
    void addMapping();
    void currentIndexChanged();
    void changingValues();
    void setData();
    void mappedWidgetAt();

    void comboBox();

    void textEditDoesntChangeFocusOnTab_qtbug3305();
};

Q_DECLARE_METATYPE(QAbstractItemDelegate::EndEditHint)

static QStandardItemModel *testModel(QObject *parent)
{
    QStandardItemModel *model = new QStandardItemModel(10, 10, parent);

    for (int row = 0; row < 10; ++row) {
        const QString prefix = QLatin1String("item ") + QString::number(row)
            + QLatin1Char(' ');
        for (int col = 0; col < 10; ++col)
            model->setData(model->index(row, col), prefix + QString::number(col));
    }

    return model;
}

void tst_QDataWidgetMapper::initTestCase()
{
    qRegisterMetaType<QAbstractItemDelegate::EndEditHint>();
}

void tst_QDataWidgetMapper::setModel()
{
    QDataWidgetMapper mapper;

    QCOMPARE(mapper.model(), nullptr);

    { // let the model go out of scope firstma
        QStandardItemModel model;
        mapper.setModel(&model);
        QCOMPARE(mapper.model(), &model);
    }

    QCOMPARE(mapper.model(), nullptr);

    { // let the mapper go out of scope first
        QStandardItemModel model2;
        QDataWidgetMapper mapper2;
        mapper2.setModel(&model2);
    }
}

void tst_QDataWidgetMapper::navigate()
{
    QDataWidgetMapper mapper;
    QAbstractItemModel *model = testModel(&mapper);
    mapper.setModel(model);

    QLineEdit edit1;
    QLineEdit edit2;
    QLineEdit edit3;

    mapper.addMapping(&edit1, 0);
    mapper.toFirst();
    mapper.addMapping(&edit2, 1);
    mapper.addMapping(&edit3, 2);

    QCOMPARE(edit1.text(), QString("item 0 0"));
    QVERIFY(edit2.text().isEmpty());
    QVERIFY(edit3.text().isEmpty());
    QVERIFY(mapper.submit());
    edit2.setText(QString("item 0 1"));
    edit3.setText(QString("item 0 2"));
    QVERIFY(mapper.submit());

    mapper.toFirst(); //this will repopulate
    QCOMPARE(edit1.text(), QString("item 0 0"));
    QCOMPARE(edit2.text(), QString("item 0 1"));
    QCOMPARE(edit3.text(), QString("item 0 2"));


    mapper.toFirst();
    QCOMPARE(edit1.text(), QString("item 0 0"));
    QCOMPARE(edit2.text(), QString("item 0 1"));
    QCOMPARE(edit3.text(), QString("item 0 2"));

    mapper.toPrevious(); // should do nothing
    QCOMPARE(edit1.text(), QString("item 0 0"));
    QCOMPARE(edit2.text(), QString("item 0 1"));
    QCOMPARE(edit3.text(), QString("item 0 2"));

    mapper.toNext();
    QCOMPARE(edit1.text(), QString("item 1 0"));
    QCOMPARE(edit2.text(), QString("item 1 1"));
    QCOMPARE(edit3.text(), QString("item 1 2"));

    mapper.toLast();
    QCOMPARE(edit1.text(), QString("item 9 0"));
    QCOMPARE(edit2.text(), QString("item 9 1"));
    QCOMPARE(edit3.text(), QString("item 9 2"));

    mapper.toNext(); // should do nothing
    QCOMPARE(edit1.text(), QString("item 9 0"));
    QCOMPARE(edit2.text(), QString("item 9 1"));
    QCOMPARE(edit3.text(), QString("item 9 2"));

    mapper.setCurrentIndex(4);
    QCOMPARE(edit1.text(), QString("item 4 0"));
    QCOMPARE(edit2.text(), QString("item 4 1"));
    QCOMPARE(edit3.text(), QString("item 4 2"));

    mapper.setCurrentIndex(-1); // should do nothing
    QCOMPARE(edit1.text(), QString("item 4 0"));
    QCOMPARE(edit2.text(), QString("item 4 1"));
    QCOMPARE(edit3.text(), QString("item 4 2"));

    mapper.setCurrentIndex(10); // should do nothing
    QCOMPARE(edit1.text(), QString("item 4 0"));
    QCOMPARE(edit2.text(), QString("item 4 1"));
    QCOMPARE(edit3.text(), QString("item 4 2"));

    mapper.setCurrentModelIndex(QModelIndex()); // should do nothing
    QCOMPARE(edit1.text(), QString("item 4 0"));
    QCOMPARE(edit2.text(), QString("item 4 1"));
    QCOMPARE(edit3.text(), QString("item 4 2"));

    mapper.setCurrentModelIndex(model->index(6, 0));
    QCOMPARE(edit1.text(), QString("item 6 0"));
    QCOMPARE(edit2.text(), QString("item 6 1"));
    QCOMPARE(edit3.text(), QString("item 6 2"));

    /* now try vertical navigation */

    mapper.setOrientation(Qt::Vertical);

    mapper.addMapping(&edit1, 0);
    mapper.addMapping(&edit2, 1);
    mapper.addMapping(&edit3, 2);

    mapper.toFirst();
    QCOMPARE(edit1.text(), QString("item 0 0"));
    QCOMPARE(edit2.text(), QString("item 1 0"));
    QCOMPARE(edit3.text(), QString("item 2 0"));

    mapper.toPrevious(); // should do nothing
    QCOMPARE(edit1.text(), QString("item 0 0"));
    QCOMPARE(edit2.text(), QString("item 1 0"));
    QCOMPARE(edit3.text(), QString("item 2 0"));

    mapper.toNext();
    QCOMPARE(edit1.text(), QString("item 0 1"));
    QCOMPARE(edit2.text(), QString("item 1 1"));
    QCOMPARE(edit3.text(), QString("item 2 1"));

    mapper.toLast();
    QCOMPARE(edit1.text(), QString("item 0 9"));
    QCOMPARE(edit2.text(), QString("item 1 9"));
    QCOMPARE(edit3.text(), QString("item 2 9"));

    mapper.toNext(); // should do nothing
    QCOMPARE(edit1.text(), QString("item 0 9"));
    QCOMPARE(edit2.text(), QString("item 1 9"));
    QCOMPARE(edit3.text(), QString("item 2 9"));

    mapper.setCurrentIndex(4);
    QCOMPARE(edit1.text(), QString("item 0 4"));
    QCOMPARE(edit2.text(), QString("item 1 4"));
    QCOMPARE(edit3.text(), QString("item 2 4"));

    mapper.setCurrentIndex(-1); // should do nothing
    QCOMPARE(edit1.text(), QString("item 0 4"));
    QCOMPARE(edit2.text(), QString("item 1 4"));
    QCOMPARE(edit3.text(), QString("item 2 4"));

    mapper.setCurrentIndex(10); // should do nothing
    QCOMPARE(edit1.text(), QString("item 0 4"));
    QCOMPARE(edit2.text(), QString("item 1 4"));
    QCOMPARE(edit3.text(), QString("item 2 4"));

    mapper.setCurrentModelIndex(QModelIndex()); // should do nothing
    QCOMPARE(edit1.text(), QString("item 0 4"));
    QCOMPARE(edit2.text(), QString("item 1 4"));
    QCOMPARE(edit3.text(), QString("item 2 4"));

    mapper.setCurrentModelIndex(model->index(0, 6));
    QCOMPARE(edit1.text(), QString("item 0 6"));
    QCOMPARE(edit2.text(), QString("item 1 6"));
    QCOMPARE(edit3.text(), QString("item 2 6"));
}

void tst_QDataWidgetMapper::addMapping()
{
    QDataWidgetMapper mapper;
    QAbstractItemModel *model = testModel(&mapper);
    mapper.setModel(model);

    QLineEdit edit1;
    mapper.addMapping(&edit1, 0);
    mapper.toFirst();
    QCOMPARE(edit1.text(), QString("item 0 0"));

    mapper.addMapping(&edit1, 1);
    mapper.toFirst();
    QCOMPARE(edit1.text(), QString("item 0 1"));

    QCOMPARE(mapper.mappedSection(&edit1), 1);

    edit1.clear();
    mapper.removeMapping(&edit1);
    mapper.toFirst();
    QCOMPARE(edit1.text(), QString());

    {
        QLineEdit edit2;
        mapper.addMapping(&edit2, 2);
        mapper.toFirst();
        QCOMPARE(edit2.text(), QString("item 0 2"));
    } // let the edit go out of scope

    QCOMPARE(mapper.mappedWidgetAt(2), nullptr);
    mapper.toLast();
}

void tst_QDataWidgetMapper::currentIndexChanged()
{
    QDataWidgetMapper mapper;
    QAbstractItemModel *model = testModel(&mapper);
    mapper.setModel(model);

    QSignalSpy spy(&mapper, &QDataWidgetMapper::currentIndexChanged);

    mapper.toFirst();
    QCOMPARE(spy.size(), 1);
    QCOMPARE(spy.takeFirst().at(0).toInt(), 0);

    mapper.toNext();
    QCOMPARE(spy.size(), 1);
    QCOMPARE(spy.takeFirst().at(0).toInt(), 1);

    mapper.setCurrentIndex(7);
    QCOMPARE(spy.size(), 1);
    QCOMPARE(spy.takeFirst().at(0).toInt(), 7);

    mapper.setCurrentIndex(-1);
    QCOMPARE(spy.size(), 0);

    mapper.setCurrentIndex(42);
    QCOMPARE(spy.size(), 0);
}

void tst_QDataWidgetMapper::changingValues()
{
    QDataWidgetMapper mapper;
    QAbstractItemModel *model = testModel(&mapper);
    mapper.setModel(model);

    QLineEdit edit1;
    mapper.addMapping(&edit1, 0);
    mapper.toFirst();
    QCOMPARE(edit1.text(), QString("item 0 0"));

    QLineEdit edit2;
    mapper.addMapping(&edit2, 0, "text");
    mapper.toFirst();
    QCOMPARE(edit2.text(), QString("item 0 0"));

    model->setData(model->index(0, 0), QString("changed"));
    QCOMPARE(edit1.text(), QString("changed"));
    QCOMPARE(edit2.text(), QString("changed"));
}

void tst_QDataWidgetMapper::setData()
{
    QDataWidgetMapper mapper;
    QAbstractItemModel *model = testModel(&mapper);
    mapper.setModel(model);

    QLineEdit edit1;
    QLineEdit edit2;
    QLineEdit edit3;

    mapper.addMapping(&edit1, 0);
    mapper.addMapping(&edit2, 1);
    mapper.addMapping(&edit3, 0, "text");
    mapper.toFirst();
    QCOMPARE(edit1.text(), QString("item 0 0"));
    QCOMPARE(edit2.text(), QString("item 0 1"));
    QCOMPARE(edit3.text(), QString("item 0 0"));

    edit1.setText("new text");

    mapper.submit();
    QCOMPARE(model->data(model->index(0, 0)).toString(), QString("new text"));

    edit3.setText("more text");

    mapper.submit();
    QCOMPARE(model->data(model->index(0, 0)).toString(), QString("more text"));
}

void tst_QDataWidgetMapper::comboBox()
{
    QDataWidgetMapper mapper;
    QAbstractItemModel *model = testModel(&mapper);
    mapper.setModel(model);
    mapper.setSubmitPolicy(QDataWidgetMapper::ManualSubmit);

    QComboBox readOnlyBox;
    readOnlyBox.setEditable(false);
    readOnlyBox.addItem("read only item 0");
    readOnlyBox.addItem("read only item 1");
    readOnlyBox.addItem("read only item 2");

    QComboBox readWriteBox;
    readWriteBox.setEditable(true);
    readWriteBox.addItem("read write item 0");
    readWriteBox.addItem("read write item 1");
    readWriteBox.addItem("read write item 2");

    // populate the combo boxes with data
    mapper.addMapping(&readOnlyBox, 0, "currentIndex");
    mapper.addMapping(&readWriteBox, 1, "currentText");
    mapper.toFirst();

    // setCurrentIndex caused the value at index 0 to be displayed
    QCOMPARE(readOnlyBox.currentText(), QString("read only item 0"));
    // setCurrentText set the value in the line edit since the combobox is editable
    QCOMPARE(readWriteBox.currentText(), QString("item 0 1"));

    // set some new values on the boxes
    readOnlyBox.setCurrentIndex(1);
    readWriteBox.setEditText("read write item y");

    mapper.submit();

    // make sure the new values are in the model
    QCOMPARE(model->data(model->index(0, 0)).toInt(), 1);
    QCOMPARE(model->data(model->index(0, 1)).toString(), QString("read write item y"));

    // now test updating of the widgets
    model->setData(model->index(0, 0), 2, Qt::EditRole);
    model->setData(model->index(0, 1), QString("read write item z"), Qt::EditRole);

    QCOMPARE(readOnlyBox.currentIndex(), 2);
    QCOMPARE(readWriteBox.currentText(), QString("read write item z"));
}

void tst_QDataWidgetMapper::mappedWidgetAt()
{
    QDataWidgetMapper mapper;
    QAbstractItemModel *model = testModel(&mapper);
    mapper.setModel(model);

    QLineEdit lineEdit1;
    QLineEdit lineEdit2;

    QCOMPARE(mapper.mappedWidgetAt(432312), nullptr);

    mapper.addMapping(&lineEdit1, 1);
    mapper.addMapping(&lineEdit2, 2);

    QCOMPARE(mapper.mappedWidgetAt(1), &lineEdit1);
    QCOMPARE(mapper.mappedWidgetAt(2), &lineEdit2);

    mapper.addMapping(&lineEdit2, 4242);

    QCOMPARE(mapper.mappedWidgetAt(2), nullptr);
    QCOMPARE(mapper.mappedWidgetAt(4242), &lineEdit2);
}

void tst_QDataWidgetMapper::textEditDoesntChangeFocusOnTab_qtbug3305()
{
    if (QGuiApplication::platformName().startsWith(QLatin1String("wayland"), Qt::CaseInsensitive))
        QSKIP("Wayland: This fails. Figure out why.");

    QDataWidgetMapper mapper;
    QAbstractItemModel *model = testModel(&mapper);
    mapper.setModel(model);

    QSignalSpy closeEditorSpy(mapper.itemDelegate(),
                              &QAbstractItemDelegate::closeEditor);
    QVERIFY(closeEditorSpy.isValid());

    QWidget container;
    container.setLayout(new QVBoxLayout);

    QLineEdit *lineEdit = new QLineEdit;
    mapper.addMapping(lineEdit, 0);
    container.layout()->addWidget(lineEdit);

    QTextEdit *textEdit = new QTextEdit;
    mapper.addMapping(textEdit, 1);
    container.layout()->addWidget(textEdit);

    lineEdit->setFocus();

    container.show();

    QApplicationPrivate::setActiveWindow(&container);
    QVERIFY(QTest::qWaitForWindowActive(&container));

    int closeEditorSpyCount = 0;
    const QString textEditContents = textEdit->toPlainText();

    QCOMPARE(closeEditorSpy.size(), closeEditorSpyCount);
    QVERIFY(lineEdit->hasFocus());
    QVERIFY(!textEdit->hasFocus());

    // this will generate a closeEditor for the tab key, and another for the focus out
    QTest::keyClick(QApplication::focusWidget(), Qt::Key_Tab);
    closeEditorSpyCount += 2;
    QTRY_COMPARE(closeEditorSpy.size(), closeEditorSpyCount);

    QTRY_VERIFY(textEdit->hasFocus());
    QVERIFY(!lineEdit->hasFocus());

    // now that the text edit is focused, a tab keypress will insert a tab, not change focus
    QTest::keyClick(QApplication::focusWidget(), Qt::Key_Tab);
    QTRY_COMPARE(closeEditorSpy.size(), closeEditorSpyCount);

    QVERIFY(!lineEdit->hasFocus());
    QVERIFY(textEdit->hasFocus());
    QCOMPARE(textEdit->toPlainText(), QLatin1Char('\t') + textEditContents);

    // now give focus back to the line edit and check closeEditor gets emitted
    lineEdit->setFocus();
    QTRY_VERIFY(lineEdit->hasFocus());
    QVERIFY(!textEdit->hasFocus());
    ++closeEditorSpyCount;
    QCOMPARE(closeEditorSpy.size(), closeEditorSpyCount);
}

QTEST_MAIN(tst_QDataWidgetMapper)
#include "tst_qdatawidgetmapper.moc"
