/****************************************************************************
**
** Copyright (C) 2015 The Qt Company Ltd.
** Contact: http://www.qt.io/licensing/
**
** This file is part of the test suite of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** 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 2.1 or version 3 as published by the Free
** Software Foundation and appearing in the file LICENSE.LGPLv21 and
** LICENSE.LGPLv3 included in the packaging of this file. Please review the
** following information to ensure the GNU Lesser General Public License
** requirements will be met: https://www.gnu.org/licenses/lgpl.html and
** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** As a special exception, The Qt Company gives you certain additional
** rights. These rights are described in The Qt Company LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3.0 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 3.0 requirements will be
** met: http://www.gnu.org/copyleft/gpl.html.
**
** $QT_END_LICENSE$
**
****************************************************************************/


#include <QtTest/QtTest>
#include <QtGui/QtGui>

#include "modeltest.h"
#include "dynamictreemodel.h"


class tst_ModelTest : public QObject
{
    Q_OBJECT

public:
    tst_ModelTest() {}
    virtual ~tst_ModelTest() {}

public slots:
    void initTestCase();
    void cleanupTestCase();
    void init();
    void cleanup();

private slots:
    void stringListModel();
    void treeWidgetModel();
    void standardItemModel();
    void testInsertThroughProxy();
    void moveSourceItems();
    void testResetThroughProxy();
};



void tst_ModelTest::initTestCase()
{
}

void tst_ModelTest::cleanupTestCase()
{
}

void tst_ModelTest::init()
{

}

void tst_ModelTest::cleanup()
{
}
/*
  tests
*/

void tst_ModelTest::stringListModel()
{
    QStringListModel model;
    QSortFilterProxyModel proxy;

    ModelTest t1(&model);
    ModelTest t2(&proxy);

    proxy.setSourceModel(&model);

    model.setStringList(QStringList() << "2" << "3" << "1");
    model.setStringList(QStringList() << "a" << "e" << "plop" << "b" << "c" );

    proxy.setDynamicSortFilter(true);
    proxy.setFilterRegExp(QRegExp("[^b]"));
}

void tst_ModelTest::treeWidgetModel()
{
    QTreeWidget widget;

    ModelTest t1(widget.model());

    QTreeWidgetItem *root = new QTreeWidgetItem(&widget, QStringList("root"));
    for (int i = 0; i < 20; ++i) {
        new QTreeWidgetItem(root, QStringList(QString::number(i)));
    }
    QTreeWidgetItem *remove = root->child(2);
    root->removeChild(remove);
    QTreeWidgetItem *parent = new QTreeWidgetItem(&widget, QStringList("parent"));
    new QTreeWidgetItem(parent, QStringList("child"));
    widget.setItemHidden(parent, true);

    widget.sortByColumn(0);
}

void tst_ModelTest::standardItemModel()
{
    QStandardItemModel model(10,10);
    QSortFilterProxyModel proxy;


    ModelTest t1(&model);
    ModelTest t2(&proxy);

    proxy.setSourceModel(&model);

    model.insertRows(2, 5);
    model.removeRows(4, 5);

    model.insertColumns(2, 5);
    model.removeColumns(4, 5);

    model.insertRows(0,5, model.index(1,1));
    model.insertColumns(0,5, model.index(1,3));
}

void tst_ModelTest::testInsertThroughProxy()
{
    DynamicTreeModel *model = new DynamicTreeModel(this);

    QSortFilterProxyModel *proxy = new QSortFilterProxyModel(this);
    proxy->setSourceModel(model);

    new ModelTest(proxy, this);

    ModelInsertCommand *insertCommand = new ModelInsertCommand(model, this);
    insertCommand->setNumCols(4);
    insertCommand->setStartRow(0);
    insertCommand->setEndRow(9);
    // Parent is QModelIndex()
    insertCommand->doCommand();

    insertCommand = new ModelInsertCommand(model, this);
    insertCommand->setNumCols(4);
    insertCommand->setAncestorRowNumbers(QList<int>() << 5);
    insertCommand->setStartRow(0);
    insertCommand->setEndRow(9);
    insertCommand->doCommand();

    ModelMoveCommand *moveCommand = new ModelMoveCommand(model, this);
    moveCommand->setNumCols(4);
    moveCommand->setStartRow(0);
    moveCommand->setEndRow(0);
    moveCommand->setDestRow(9);
    moveCommand->setDestAncestors(QList<int>() << 5);
    moveCommand->doCommand();
}

/**
  Makes the persistent index list publicly accessible
*/
class AccessibleProxyModel : public QSortFilterProxyModel
{
    Q_OBJECT
public:
    AccessibleProxyModel(QObject *parent = 0) : QSortFilterProxyModel(parent) {}

    QModelIndexList persistent()
    {
        return persistentIndexList();
    }
};

class ObservingObject : public QObject
{
    Q_OBJECT
public:
    ObservingObject(AccessibleProxyModel  *proxy, QObject *parent = 0)
    : QObject(parent)
    , m_proxy(proxy)
    , storePersistentFailureCount(0)
    , checkPersistentFailureCount(0)
    {
        connect(m_proxy, SIGNAL(layoutAboutToBeChanged()), SLOT(storePersistent()));
        connect(m_proxy, SIGNAL(layoutChanged()), SLOT(checkPersistent()));
    }

public slots:

    void storePersistent(const QModelIndex &parent)
    {
        for (int row = 0; row < m_proxy->rowCount(parent); ++row) {
            QModelIndex proxyIndex = m_proxy->index(row, 0, parent);
            QModelIndex sourceIndex = m_proxy->mapToSource(proxyIndex);
            if (!proxyIndex.isValid()) {
                qWarning("%s: Invalid proxy index", Q_FUNC_INFO);
                ++storePersistentFailureCount;
            }
            if (!sourceIndex.isValid()) {
                qWarning("%s: invalid source index", Q_FUNC_INFO);
                ++storePersistentFailureCount;
            }
            m_persistentSourceIndexes.append(sourceIndex);
            m_persistentProxyIndexes.append(proxyIndex);
            if (m_proxy->hasChildren(proxyIndex))
                storePersistent(proxyIndex);
        }
    }

    void storePersistent()
    {
        // This method is called from layoutAboutToBeChanged. Persistent indexes should be valid
        foreach(const QModelIndex &idx, m_persistentProxyIndexes)
            if (!idx.isValid()) {
                qWarning("%s: persistentProxyIndexes contains invalid index", Q_FUNC_INFO);
                ++storePersistentFailureCount;
            }

        if (!m_proxy->persistent().isEmpty()) {
            qWarning("%s: proxy should have no persistent indexes when storePersistent called",
                     Q_FUNC_INFO);
            ++storePersistentFailureCount;
        }
        storePersistent(QModelIndex());
        if (m_proxy->persistent().isEmpty()) {
            qWarning("%s: proxy should have persistent index after storePersistent called",
                     Q_FUNC_INFO);
            ++storePersistentFailureCount;
        }
    }

    void checkPersistent()
    {
        for (int row = 0; row < m_persistentProxyIndexes.size(); ++row) {
            QModelIndex updatedProxy = m_persistentProxyIndexes.at(row);
            QModelIndex updatedSource = m_persistentSourceIndexes.at(row);
        }
        for (int row = 0; row < m_persistentProxyIndexes.size(); ++row) {
            QModelIndex updatedProxy = m_persistentProxyIndexes.at(row);
            QModelIndex updatedSource = m_persistentSourceIndexes.at(row);
            if (m_proxy->mapToSource(updatedProxy) != updatedSource) {
                qWarning("%s: check failed at row %d", Q_FUNC_INFO, row);
                ++checkPersistentFailureCount;
            }
        }
        m_persistentSourceIndexes.clear();
        m_persistentProxyIndexes.clear();
    }

private:
    AccessibleProxyModel  *m_proxy;
    QList<QPersistentModelIndex> m_persistentSourceIndexes;
    QList<QPersistentModelIndex> m_persistentProxyIndexes;
public:
    int storePersistentFailureCount;
    int checkPersistentFailureCount;
};

void tst_ModelTest::moveSourceItems()
{
    DynamicTreeModel *model = new DynamicTreeModel(this);
    AccessibleProxyModel *proxy = new AccessibleProxyModel(this);
    proxy->setSourceModel(model);

    ModelInsertCommand *insertCommand = new ModelInsertCommand(model, this);
    insertCommand->setStartRow(0);
    insertCommand->setEndRow(2);
    insertCommand->doCommand();

    insertCommand = new ModelInsertCommand(model, this);
    insertCommand->setAncestorRowNumbers(QList<int>() << 1);
    insertCommand->setStartRow(0);
    insertCommand->setEndRow(2);
    insertCommand->doCommand();

    ObservingObject observer(proxy);

    ModelMoveCommand *moveCommand = new ModelMoveCommand(model, this);
    moveCommand->setStartRow(0);
    moveCommand->setEndRow(0);
    moveCommand->setDestAncestors(QList<int>() << 1);
    moveCommand->setDestRow(0);
    moveCommand->doCommand();

    QCOMPARE(observer.storePersistentFailureCount, 0);
    QCOMPARE(observer.checkPersistentFailureCount, 0);
}

void tst_ModelTest::testResetThroughProxy()
{
    DynamicTreeModel *model = new DynamicTreeModel(this);

    ModelInsertCommand *insertCommand = new ModelInsertCommand(model, this);
    insertCommand->setStartRow(0);
    insertCommand->setEndRow(2);
    insertCommand->doCommand();

    QPersistentModelIndex persistent = model->index(0, 0);

    AccessibleProxyModel *proxy = new AccessibleProxyModel(this);
    proxy->setSourceModel(model);

    ObservingObject observer(proxy);
    observer.storePersistent();

    ModelResetCommand *resetCommand = new ModelResetCommand(model, this);
    resetCommand->setNumCols(0);
    resetCommand->doCommand();

    QCOMPARE(observer.storePersistentFailureCount, 0);
    QCOMPARE(observer.checkPersistentFailureCount, 0);
}


QTEST_MAIN(tst_ModelTest)
#include "tst_modeltest.moc"