/****************************************************************************
**
** Copyright (C) 2016 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of Qt Creator.
**
** 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 https://www.qt.io/terms-conditions. For further
** information use the contact form at https://www.qt.io/contact-us.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3 as published by the Free Software
** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
** included in the packaging of this file. Please review the following
** information to ensure the GNU General Public License requirements will
** be met: https://www.gnu.org/licenses/gpl-3.0.html.
**
****************************************************************************/

#include "nodeinstanceserver.h"

#include "servernodeinstance.h"
#include "objectnodeinstance.h"
#include "childrenchangeeventfilter.h"

#include "dummycontextobject.h"

#include <propertyabstractcontainer.h>
#include <propertybindingcontainer.h>
#include <propertyvaluecontainer.h>
#include <instancecontainer.h>

#include <commondefines.h>
#include <nodeinstanceclientinterface.h>

#include <qmlprivategate.h>

#if (QT_VERSION >= QT_VERSION_CHECK(5, 6, 0))
#include <private/qquickdesignersupportmetainfo_p.h>
#endif

#include <createinstancescommand.h>
#include <changefileurlcommand.h>
#include <clearscenecommand.h>
#include <reparentinstancescommand.h>
#include <changevaluescommand.h>
#include <changeauxiliarycommand.h>
#include <changebindingscommand.h>
#include <changeidscommand.h>
#include <removeinstancescommand.h>
#include <removepropertiescommand.h>
#include <valueschangedcommand.h>
#include <informationchangedcommand.h>
#include <pixmapchangedcommand.h>
#include <changestatecommand.h>
#include <childrenchangedcommand.h>
#include <completecomponentcommand.h>
#include <componentcompletedcommand.h>
#include <createscenecommand.h>
#include <changenodesourcecommand.h>
#include <tokencommand.h>
#include <removesharedmemorycommand.h>

#include <QDebug>
#include <QQmlEngine>
#include <QQmlApplicationEngine>
#include <QFileSystemWatcher>
#include <QUrl>
#include <QSet>
#include <QDir>
#include <QVariant>
#include <QMetaType>
#include <QQmlComponent>
#include <QQmlContext>
#include <qqmllist.h>
#include <QAbstractAnimation>
#include <QMutableVectorIterator>
#include <QQuickView>
#include <QSet>
#include <designersupportdelegate.h>

#include <algorithm>

namespace {
bool testImportStatements(const QStringList &importStatementList, const QUrl &url, QString *errorMessage = 0) {
    if (importStatementList.isEmpty())
        return false;
    // ToDo: move engine outside of this function, this makes it expensive
    QQmlEngine engine;
    QQmlComponent testImportComponent(&engine);

    QByteArray testComponentCode = QStringList(importStatementList).join("\n").toUtf8();

    testImportComponent.setData(testComponentCode.append("\nItem {}\n"), url);
    testImportComponent.create();

    if (testImportComponent.isError()) {
        if (errorMessage) {
            errorMessage->append("found not working imports: ");
            errorMessage->append(testImportComponent.errorString());
        }
        return false;
    }
    return true;
}

void sortFilterImports(const QStringList &imports, QStringList *workingImports, QStringList *failedImports, const QUrl &url, QString *errorMessage)
{
    static QSet<QString> visited;
    QString visitCheckId("imports: %1, workingImports: %2, failedImports: %3");
    visitCheckId = visitCheckId.arg(imports.join(""), workingImports->join(""), failedImports->join(""));
    if (visited.contains(visitCheckId))
        return;
    else
        visited.insert(visitCheckId);

    for (const QString &import : imports) {
        const QStringList alreadyTestedImports = *workingImports + *failedImports;
        if (!alreadyTestedImports.contains(import)) {
            QStringList readyForTestImports = *workingImports;
            readyForTestImports.append(import);

            QString lastErrorMessage;
            if (testImportStatements(readyForTestImports, url, &lastErrorMessage)) {
                Q_ASSERT(!workingImports->contains(import));
                workingImports->append(import);
            } else {
                if (imports.endsWith(import) == false) {
                    // the not working import is not the last import, so there could be some
                    // import dependency which we try with the reorderd remaining imports
                    QStringList reorderedImports;
                    std::copy_if(imports.cbegin(), imports.cend(), std::back_inserter(reorderedImports),
                                 [&import, &alreadyTestedImports] (const QString &checkForResortingImport){
                        if (checkForResortingImport == import)
                            return false;
                        return !alreadyTestedImports.contains(checkForResortingImport);
                    });
                    reorderedImports.append(import);
                    sortFilterImports(reorderedImports, workingImports, failedImports, url, errorMessage);
                } else {
                    Q_ASSERT(!failedImports->contains(import));
                    failedImports->append(import);
                    if (errorMessage)
                        errorMessage->append(lastErrorMessage);
                }
            }
        }
    }
}
} // anonymous

namespace QmlDesigner {

static NodeInstanceServer *nodeInstanceServerInstance = nullptr;

static void notifyPropertyChangeCallBackFunction(QObject *object, const PropertyName &propertyName)
{
    qint32 id = nodeInstanceServerInstance->instanceForObject(object).instanceId();
    nodeInstanceServerInstance->notifyPropertyChange(id, propertyName);
}

static void (*notifyPropertyChangeCallBackPointer)(QObject *, const PropertyName &) = &notifyPropertyChangeCallBackFunction;

NodeInstanceServer::NodeInstanceServer(NodeInstanceClientInterface *nodeInstanceClient) :
    NodeInstanceServerInterface(),
    m_childrenChangeEventFilter(new Internal::ChildrenChangeEventFilter(this)),
    m_nodeInstanceClient(nodeInstanceClient)
{
    qmlRegisterType<DummyContextObject>("QmlDesigner", 1, 0, "DummyContextObject");

    connect(m_childrenChangeEventFilter.data(), &Internal::ChildrenChangeEventFilter::childrenChanged, this, &NodeInstanceServer::emitParentChanged);
    nodeInstanceServerInstance = this;
    Internal::QmlPrivateGate::registerNotifyPropertyChangeCallBack(notifyPropertyChangeCallBackPointer);
    Internal::QmlPrivateGate::registerFixResourcePathsForObjectCallBack();
}

QList<ServerNodeInstance> NodeInstanceServer::createInstances(const QVector<InstanceContainer> &containerVector)
{
    Q_ASSERT(declarativeView() || quickView());
    QList<ServerNodeInstance> instanceList;
    foreach (const InstanceContainer &instanceContainer, containerVector) {
        ServerNodeInstance instance;
        if (instanceContainer.nodeSourceType() == InstanceContainer::ComponentSource) {
            instance = ServerNodeInstance::create(this, instanceContainer, ServerNodeInstance::WrapAsComponent);
        } else {
            instance = ServerNodeInstance::create(this, instanceContainer, ServerNodeInstance::DoNotWrapAsComponent);
        }
        insertInstanceRelationship(instance);
        instanceList.append(instance);
        instance.internalObject()->installEventFilter(childrenChangeEventFilter());
        if (instanceContainer.instanceId() == 0) {
            m_rootNodeInstance = instance;
            if (quickView())
                quickView()->setContent(fileUrl(), m_importComponent, m_rootNodeInstance.rootQuickItem());
            resizeCanvasSizeToRootItemSize();
        }

        foreach (QQmlContext* context, allSubContextsForObject(instance.internalObject()))
            setupDummysForContext(context);
    }

    return instanceList;
}

void NodeInstanceServer::createInstances(const CreateInstancesCommand &command)
{
    createInstances(command.instances());
    startRenderTimer();
}

ServerNodeInstance NodeInstanceServer::instanceForId(qint32 id) const
{
    if (id < 0)
        return ServerNodeInstance();

    Q_ASSERT(m_idInstanceHash.contains(id));
    return m_idInstanceHash.value(id);
}

bool NodeInstanceServer::hasInstanceForId(qint32 id) const
{
    if (id < 0)
        return false;

    return m_idInstanceHash.contains(id) && m_idInstanceHash.value(id).isValid();
}

ServerNodeInstance NodeInstanceServer::instanceForObject(QObject *object) const
{
    Q_ASSERT(m_objectInstanceHash.contains(object));
    return m_objectInstanceHash.value(object);
}

bool NodeInstanceServer::hasInstanceForObject(QObject *object) const
{
    if (object == nullptr)
        return false;

    return m_objectInstanceHash.contains(object) && m_objectInstanceHash.value(object).isValid();
}

void NodeInstanceServer::setRenderTimerInterval(int timerInterval)
{
    m_renderTimerInterval = timerInterval;
}

void NodeInstanceServer::setSlowRenderTimerInterval(int timerInterval)
{
    m_slowRenderTimerInterval = timerInterval;
}

void NodeInstanceServer::setTimerId(int timerId)
{
    m_timer = timerId;
}

int NodeInstanceServer::timerId() const
{
    return m_timer;
}

int NodeInstanceServer::renderTimerInterval() const
{
    return m_renderTimerInterval;
}

void NodeInstanceServer::startRenderTimer()
{
    if (m_slowRenderTimer)
        stopRenderTimer();

    if (m_timer == 0)
        m_timer = startTimer(m_renderTimerInterval);

    m_slowRenderTimer = false;
}

void NodeInstanceServer::slowDownRenderTimer()
{
    if (!m_slowRenderTimer)
        stopRenderTimer();

    if (m_timer != 0) {
        killTimer(m_timer);
        m_timer = 0;
    }

    if (m_timer == 0)
        m_timer = startTimer(m_slowRenderTimerInterval);

    m_slowRenderTimer = true;
}

void NodeInstanceServer::stopRenderTimer()
{
    if (m_timer) {
        killTimer(m_timer);
        m_timer = 0;
    }
}

void NodeInstanceServer::createScene(const CreateSceneCommand &command)
{
    initializeView();

    Internal::QmlPrivateGate::stopUnifiedTimer();

    setupScene(command);
    refreshBindings();
    startRenderTimer();
}

void NodeInstanceServer::clearScene(const ClearSceneCommand &/*command*/)
{
    stopRenderTimer();

    removeAllInstanceRelationships();
    m_fileSystemWatcherHash.clear();
    m_rootNodeInstance.makeInvalid();
    m_changedPropertyList.clear();
    m_fileUrl.clear();
}

void NodeInstanceServer::removeInstances(const RemoveInstancesCommand &command)
{
    ServerNodeInstance oldState = activeStateInstance();
    if (activeStateInstance().isValid())
        activeStateInstance().deactivateState();

    foreach (qint32 instanceId, command.instanceIds()) {
        removeInstanceRelationsip(instanceId);
    }

    if (oldState.isValid())
        oldState.activateState();

    refreshBindings();
    startRenderTimer();
}

void NodeInstanceServer::removeProperties(const RemovePropertiesCommand &command)
{
    bool hasDynamicProperties = false;
    foreach (const PropertyAbstractContainer &container, command.properties()) {
        hasDynamicProperties |= container.isDynamic();
        resetInstanceProperty(container);
    }

    if (hasDynamicProperties)
        refreshBindings();

    startRenderTimer();
}

void NodeInstanceServer::reparentInstances(const QVector<ReparentContainer> &containerVector)
{
    foreach (const ReparentContainer &container, containerVector) {
        if (hasInstanceForId(container.instanceId())) {
            ServerNodeInstance instance = instanceForId(container.instanceId());
            if (instance.isValid()) {
                instance.reparent(instanceForId(container.oldParentInstanceId()), container.oldParentProperty(), instanceForId(container.newParentInstanceId()), container.newParentProperty());
            }
        }
    }
}

void NodeInstanceServer::reparentInstances(const ReparentInstancesCommand &command)
{
    reparentInstances(command.reparentInstances());
    refreshBindings();
    startRenderTimer();
}

void NodeInstanceServer::changeState(const ChangeStateCommand &command)
{
    if (hasInstanceForId(command.stateInstanceId())) {
        if (activeStateInstance().isValid())
            activeStateInstance().deactivateState();
        ServerNodeInstance instance = instanceForId(command.stateInstanceId());
        instance.activateState();
    } else {
        if (activeStateInstance().isValid())
            activeStateInstance().deactivateState();
    }

    startRenderTimer();
}

void NodeInstanceServer::completeComponent(const CompleteComponentCommand &command)
{
    QList<ServerNodeInstance> instanceList;

    foreach (qint32 instanceId, command.instances()) {
        if (hasInstanceForId(instanceId)) {
            ServerNodeInstance instance = instanceForId(instanceId);
            instance.doComponentComplete();
            instanceList.append(instance);
        }
    }

    startRenderTimer();
}

void NodeInstanceServer::changeNodeSource(const ChangeNodeSourceCommand &command)
{
    if (hasInstanceForId(command.instanceId())) {
        ServerNodeInstance instance = instanceForId(command.instanceId());
        if (instance.isValid())
            instance.setNodeSource(command.nodeSource());
    }

    startRenderTimer();
}

void NodeInstanceServer::token(const TokenCommand &/*command*/)
{

}

void NodeInstanceServer::removeSharedMemory(const RemoveSharedMemoryCommand &/*command*/)
{
}

void NodeInstanceServer::setupImports(const QVector<AddImportContainer> &containerVector)
{
    Q_ASSERT(quickView());
    QSet<QString> importStatementSet;
    QString qtQuickImport;

    foreach (const AddImportContainer &container, containerVector) {
        QString importStatement = QString("import ");

        if (!container.fileName().isEmpty())
            importStatement += '"' + container.fileName() + '"';
        else if (!container.url().isEmpty())
            importStatement += container.url().toString();

        if (!container.version().isEmpty())
            importStatement += ' ' + container.version();

        if (!container.alias().isEmpty())
            importStatement += " as " + container.alias();

        if (importStatement.startsWith(QLatin1String("import QtQuick") + QChar(QChar::Space)))
            qtQuickImport = importStatement;
        else
            importStatementSet.insert(importStatement);
    }

    delete m_importComponent.data();
    delete m_importComponentObject.data();
    const QStringList importStatementList(importStatementSet.toList());
    const QStringList fullImportStatementList(QStringList(qtQuickImport) + importStatementList);

    // check possible import statements combinations
    // but first try the current order -> maybe it just works
    if (testImportStatements(fullImportStatementList, fileUrl())) {
        setupOnlyWorkingImports(fullImportStatementList);
    } else {
        QString errorMessage;

        if (!testImportStatements(QStringList(qtQuickImport), fileUrl(), &errorMessage))
            qtQuickImport = "import QtQuick 2.0";
        if (testImportStatements(QStringList(qtQuickImport), fileUrl(), &errorMessage)) {
            QStringList workingImportStatementList;
            QStringList failedImportList;
            sortFilterImports(QStringList(qtQuickImport) + importStatementList, &workingImportStatementList,
                &failedImportList, fileUrl(), &errorMessage);
            setupOnlyWorkingImports(workingImportStatementList);
        }
        if (!errorMessage.isEmpty())
            sendDebugOutput(DebugOutputCommand::WarningType, errorMessage);
    }
}

void NodeInstanceServer::setupOnlyWorkingImports(const QStringList &workingImportStatementList)
{
    QByteArray componentCode = workingImportStatementList.join("\n").toUtf8().append("\n");
    m_importCode = componentCode;

    m_importComponent = new QQmlComponent(engine(), quickView());
    quickView()->setContent(fileUrl(), m_importComponent, quickView()->rootObject());

    m_importComponent->setData(componentCode.append("\nItem {}\n"), fileUrl());
    m_importComponentObject = m_importComponent->create();

    Q_ASSERT(m_importComponent && m_importComponentObject);
    Q_ASSERT_X(m_importComponent->errors().isEmpty(), __FUNCTION__, m_importComponent->errorString().toLatin1());
}

void NodeInstanceServer::setupFileUrl(const QUrl &fileUrl)
{
    if (!fileUrl.isEmpty()) {
        engine()->setBaseUrl(fileUrl);
        m_fileUrl = fileUrl;
    }
}

void NodeInstanceServer::setupDummyData(const QUrl &fileUrl)
{
    if (!fileUrl.isEmpty()) {
        QStringList dummyDataDirectoryList = dummyDataDirectories(QFileInfo(fileUrl.toLocalFile()).path());
        foreach (const QString &dummyDataDirectory, dummyDataDirectoryList) {
            loadDummyDataFiles(dummyDataDirectory);
            loadDummyDataContext(dummyDataDirectory);
        }
    }

    if (m_dummyContextObject.isNull())
        setupDefaultDummyData();
    rootContext()->setContextObject(m_dummyContextObject);
}

void NodeInstanceServer::setupDefaultDummyData()
{
    QQmlComponent component(engine());
    QByteArray defaultContextObjectArray("import QtQml 2.0\n"
                                         "import QmlDesigner 1.0\n"
                                         "DummyContextObject {\n"
                                         "    parent: QtObject {\n"
                                         "        property real width: 360\n"
                                         "        property real height: 640\n"
                                         "    }\n"
                                         "}\n");

    component.setData(defaultContextObjectArray, fileUrl());
    m_dummyContextObject = component.create();

    if (component.isError()) {
        QList<QQmlError> errors = component.errors();
        foreach (const QQmlError &error, errors) {
            qWarning() << error;
        }
    }

    if (m_dummyContextObject) {
        qDebug() << "Loaded default dummy context object.";
        m_dummyContextObject->setParent(this);
    }

    refreshBindings();
}

QList<ServerNodeInstance> NodeInstanceServer::setupInstances(const CreateSceneCommand &command)
{
    QList<ServerNodeInstance> instanceList = createInstances(command.instances());

    foreach (const IdContainer &container, command.ids()) {
        if (hasInstanceForId(container.instanceId()))
            instanceForId(container.instanceId()).setId(container.id());
    }

    foreach (const PropertyValueContainer &container, command.valueChanges()) {
        if (container.isDynamic())
            setInstancePropertyVariant(container);
    }

    foreach (const PropertyValueContainer &container, command.valueChanges()) {
        if (!container.isDynamic())
            setInstancePropertyVariant(container);
    }

    reparentInstances(command.reparentInstances());

    foreach (const PropertyBindingContainer &container, command.bindingChanges()) {
        if (container.isDynamic())
            setInstancePropertyBinding(container);
    }

    foreach (const PropertyBindingContainer &container, command.bindingChanges()) {
        if (!container.isDynamic())
            setInstancePropertyBinding(container);
    }

    foreach (const PropertyValueContainer &container, command.auxiliaryChanges()) {
        setInstanceAuxiliaryData(container);
    }


    QListIterator<ServerNodeInstance> instanceListIterator(instanceList);
    instanceListIterator.toBack();
    while (instanceListIterator.hasPrevious()) {
        ServerNodeInstance instance = instanceListIterator.previous();
        instance.doComponentComplete();
    }

    return instanceList;
}

void NodeInstanceServer::changeFileUrl(const ChangeFileUrlCommand &command)
{
    m_fileUrl = command.fileUrl();

    if (engine())
        engine()->setBaseUrl(m_fileUrl);

    refreshBindings();
    startRenderTimer();
}

void NodeInstanceServer::changePropertyValues(const ChangeValuesCommand &command)
{
    bool hasDynamicProperties = false;
    foreach (const PropertyValueContainer &container, command.valueChanges()) {
        hasDynamicProperties |= container.isDynamic();
        setInstancePropertyVariant(container);
    }

    if (hasDynamicProperties)
        refreshBindings();

    startRenderTimer();
}

void NodeInstanceServer::changeAuxiliaryValues(const ChangeAuxiliaryCommand &command)
{
    foreach (const PropertyValueContainer &container, command.auxiliaryChanges()) {
        setInstanceAuxiliaryData(container);
    }

    startRenderTimer();
}

void NodeInstanceServer::changePropertyBindings(const ChangeBindingsCommand &command)
{
    bool hasDynamicProperties = false;
    foreach (const PropertyBindingContainer &container, command.bindingChanges()) {
        hasDynamicProperties |= container.isDynamic();
        setInstancePropertyBinding(container);
    }

    if (hasDynamicProperties)
        refreshBindings();

    startRenderTimer();
}

void NodeInstanceServer::changeIds(const ChangeIdsCommand &command)
{
    foreach (const IdContainer &container, command.ids()) {
        if (hasInstanceForId(container.instanceId()))
            instanceForId(container.instanceId()).setId(container.id());
    }

    refreshBindings();
    startRenderTimer();
}

QQmlContext *NodeInstanceServer::context() const
{
    if (m_importComponentObject) {
        QQmlContext *importComponentContext = QQmlEngine::contextForObject(m_importComponentObject.data());
        if (importComponentContext) // this should be the default
            return importComponentContext;
    }

    if (engine())
        return rootContext();

    return nullptr;
}

QQmlContext *NodeInstanceServer::rootContext() const
{
    return engine()->rootContext();
}

const QVector<NodeInstanceServer::InstancePropertyPair> NodeInstanceServer::changedPropertyList() const
{
    return m_changedPropertyList;
}

void NodeInstanceServer::clearChangedPropertyList()
{
    m_changedPropertyList.clear();
}

void NodeInstanceServer::setupDummysForContext(QQmlContext *context)
{
    foreach (const DummyPair& dummyPair, m_dummyObjectList) {
        if (dummyPair.second) {
            context->setContextProperty(dummyPair.first, dummyPair.second.data());
        }
    }
}

static bool isTypeAvailable(const MockupTypeContainer &mockupType, QQmlEngine *engine)
{
    QString qmlSource;
    qmlSource.append("import " +
                     mockupType.importUri()
                     + " "
                     + QString::number(mockupType.majorVersion())
                     + "." + QString::number(mockupType.minorVersion())
                     + "\n");

    qmlSource.append(QString::fromUtf8(mockupType.typeName()) + "{\n}\n");

    QQmlComponent component(engine);
    component.setData(qmlSource.toUtf8(), QUrl());

    return !component.isError();
}

void NodeInstanceServer::setupMockupTypes(const QVector<MockupTypeContainer> &container)
{
    for (const MockupTypeContainer &mockupType :  container) {
        if (!isTypeAvailable(mockupType, engine()))
#if (QT_VERSION >= QT_VERSION_CHECK(5, 8, 0))

            QQuickDesignerSupportMetaInfo::registerMockupObject(mockupType.importUri().toUtf8(),
                                                            mockupType.majorVersion(),
                                                            mockupType.minorVersion(),
                                                            mockupType.typeName());
#else
            qmlRegisterType(QUrl("qrc:/qtquickplugin/mockfiles/GenericBackend.qml"),
                        mockupType.importUri().toUtf8(),
                        mockupType.majorVersion(),
                        mockupType.minorVersion(),
                        mockupType.typeName());
#endif

    }
}


QList<QQmlContext*> NodeInstanceServer::allSubContextsForObject(QObject *object)
{
    QList<QQmlContext*> contextList;

    if (object) {
        foreach (QObject *subObject, allSubObjectsForObject(object)) {
            QQmlContext *contextOfObject = QQmlEngine::contextForObject(subObject);
            if (contextOfObject) {
                if (contextOfObject != context() && !contextList.contains(contextOfObject))
                    contextList.append(contextOfObject);
            }
        }
    }

    return contextList;
}

QList<QObject*> NodeInstanceServer::allSubObjectsForObject(QObject *object)
{
    QList<QObject*> subChildren;
    if (object) {
        subChildren = object->findChildren<QObject*>();
    }

    return subChildren;
}

void NodeInstanceServer::removeAllInstanceRelationships()
{
    // prevent destroyed() signals calling back

    foreach (ServerNodeInstance instance, m_objectInstanceHash) {
        if (instance.isValid())
            instance.setId(QString());
    }

    //first  the root object
    if (rootNodeInstance().internalObject())
        rootNodeInstance().internalObject()->disconnect();

    rootNodeInstance().makeInvalid();


    foreach (ServerNodeInstance instance, m_objectInstanceHash) {
        if (instance.internalObject())
            instance.internalObject()->disconnect();
        instance.makeInvalid();
    }

    m_idInstanceHash.clear();
    m_objectInstanceHash.clear();
}

QFileSystemWatcher *NodeInstanceServer::dummydataFileSystemWatcher()
{
    if (m_dummdataFileSystemWatcher.isNull()) {
        m_dummdataFileSystemWatcher = new QFileSystemWatcher(this);
        connect(m_dummdataFileSystemWatcher.data(), &QFileSystemWatcher::fileChanged, this, &NodeInstanceServer::refreshDummyData);
    }

    return m_dummdataFileSystemWatcher.data();
}

QFileSystemWatcher *NodeInstanceServer::fileSystemWatcher()
{
    if (m_fileSystemWatcher.isNull()) {
        m_fileSystemWatcher = new QFileSystemWatcher(this);
        connect(m_fileSystemWatcher.data(), &QFileSystemWatcher::fileChanged, this, &NodeInstanceServer::refreshLocalFileProperty);
    }

    return m_fileSystemWatcher.data();
}

Internal::ChildrenChangeEventFilter *NodeInstanceServer::childrenChangeEventFilter() const
{
    return m_childrenChangeEventFilter.data();
}

void NodeInstanceServer::addFilePropertyToFileSystemWatcher(QObject *object, const PropertyName &propertyName, const QString &path)
{
    if (!m_fileSystemWatcherHash.contains(path)) {
        m_fileSystemWatcherHash.insert(path, ObjectPropertyPair(object, propertyName));
        fileSystemWatcher()->addPath(path);
    }
}

void NodeInstanceServer::removeFilePropertyFromFileSystemWatcher(QObject *object, const PropertyName &propertyName, const QString &path)
{
    if (m_fileSystemWatcherHash.contains(path)) {
        fileSystemWatcher()->removePath(path);
        m_fileSystemWatcherHash.remove(path, ObjectPropertyPair(object, propertyName));
    }
}

void NodeInstanceServer::refreshLocalFileProperty(const QString &path)
{
    if (m_fileSystemWatcherHash.contains(path)) {
        foreach (const ObjectPropertyPair &objectPropertyPair, m_fileSystemWatcherHash) {
            QObject *object = objectPropertyPair.first.data();
            PropertyName propertyName = objectPropertyPair.second;

            if (hasInstanceForObject(object)) {
                instanceForObject(object).refreshProperty(propertyName);
            }
        }
    }
}

void NodeInstanceServer::refreshDummyData(const QString &path)
{
    engine()->clearComponentCache();
    QFileInfo filePath(path);
    if (filePath.completeBaseName().contains("_dummycontext")) {
        loadDummyContextObjectFile(filePath);
    } else {
        loadDummyDataFile(filePath);
    }

    refreshBindings();
    startRenderTimer();
}

void NodeInstanceServer::addChangedProperty(const InstancePropertyPair &property)
{
    if (!m_changedPropertyList.contains(property))
        m_changedPropertyList.append(property);
}

void NodeInstanceServer::emitParentChanged(QObject *child)
{
    if (hasInstanceForObject(child)) {
        addChangedProperty(InstancePropertyPair(instanceForObject(child), "parent"));
    }
}

Internal::ChildrenChangeEventFilter *NodeInstanceServer::childrenChangeEventFilter()
{
    if (m_childrenChangeEventFilter.isNull()) {
        m_childrenChangeEventFilter = new Internal::ChildrenChangeEventFilter(this);
        connect(m_childrenChangeEventFilter.data(), &Internal::ChildrenChangeEventFilter::childrenChanged, this, &NodeInstanceServer::emitParentChanged);
    }

    return m_childrenChangeEventFilter.data();
}

void NodeInstanceServer::resetInstanceProperty(const PropertyAbstractContainer &propertyContainer)
{
    if (hasInstanceForId(propertyContainer.instanceId())) { // TODO ugly workaround
        ServerNodeInstance instance = instanceForId(propertyContainer.instanceId());
        Q_ASSERT(instance.isValid());

        const PropertyName name = propertyContainer.name();

        if (activeStateInstance().isValid() && !instance.isSubclassOf("QtQuick/PropertyChanges")) {
            bool statePropertyWasReseted = activeStateInstance().resetStateProperty(instance, name, instance.resetVariant(name));
            if (!statePropertyWasReseted)
                instance.resetProperty(name);
        } else {
            instance.resetProperty(name);
        }

        if (propertyContainer.isDynamic() && propertyContainer.instanceId() == 0 && engine())
            rootContext()->setContextProperty(QString::fromUtf8(name), QVariant());
    }
}


void NodeInstanceServer::setInstancePropertyBinding(const PropertyBindingContainer &bindingContainer)
{
    if (hasInstanceForId(bindingContainer.instanceId())) {
        ServerNodeInstance instance = instanceForId(bindingContainer.instanceId());

        const PropertyName name = bindingContainer.name();
        const QString expression = bindingContainer.expression();


        if (activeStateInstance().isValid() && !instance.isSubclassOf("QtQuick/PropertyChanges")) {
            bool stateBindingWasUpdated = activeStateInstance().updateStateBinding(instance, name, expression);
            if (!stateBindingWasUpdated) {
                if (bindingContainer.isDynamic())
                    Internal::QmlPrivateGate::createNewDynamicProperty(instance.internalInstance()->object(), engine(),
                                                                       QString::fromUtf8(name));
                instance.setPropertyBinding(name, expression);
            }
        } else {
            if (bindingContainer.isDynamic())
                Internal::QmlPrivateGate::createNewDynamicProperty(instance.internalInstance()->object(), engine(),
                                                                   QString::fromUtf8(name));
            instance.setPropertyBinding(name, expression);
        }
    }
}


void NodeInstanceServer::removeProperties(const QList<PropertyAbstractContainer> &propertyList)
{
    foreach (const PropertyAbstractContainer &property, propertyList)
        resetInstanceProperty(property);
}

void NodeInstanceServer::setInstancePropertyVariant(const PropertyValueContainer &valueContainer)
{
    if (hasInstanceForId(valueContainer.instanceId())) {
        ServerNodeInstance instance = instanceForId(valueContainer.instanceId());


        const PropertyName name = valueContainer.name();
        const QVariant value = valueContainer.value();


        if (activeStateInstance().isValid() && !instance.isSubclassOf("QtQuick/PropertyChanges")) {
            bool stateValueWasUpdated = activeStateInstance().updateStateVariant(instance, name, value);
            if (!stateValueWasUpdated) {
                if (valueContainer.isDynamic())
                    Internal::QmlPrivateGate::createNewDynamicProperty(instance.internalInstance()->object(), engine(), QString::fromUtf8(name));
                instance.setPropertyVariant(name, value);
            }
        } else { //base state
            if (valueContainer.isDynamic())
                Internal::QmlPrivateGate::createNewDynamicProperty(instance.internalInstance()->object(), engine(), QString::fromUtf8(name));
            instance.setPropertyVariant(name, value);
        }

        if (valueContainer.isDynamic() && valueContainer.instanceId() == 0 && engine())
            rootContext()->setContextProperty(QString::fromUtf8(name), Internal::QmlPrivateGate::fixResourcePaths(value));
    }
}

void NodeInstanceServer::setInstanceAuxiliaryData(const PropertyValueContainer &auxiliaryContainer)
{
    //instanceId() == 0: the item is root
    if (auxiliaryContainer.instanceId() == 0 && (auxiliaryContainer.name() == "width" ||
                                        auxiliaryContainer.name() == "height")) {

        if (!auxiliaryContainer.value().isNull()) {
            setInstancePropertyVariant(auxiliaryContainer);
        } else {
            rootNodeInstance().resetProperty(auxiliaryContainer.name());
        }
    }
    if (auxiliaryContainer.name().endsWith("@NodeInstance")) {
        PropertyName propertyName = auxiliaryContainer.name().left(auxiliaryContainer.name().count() - 13);
        if (!auxiliaryContainer.value().isNull()) {
            setInstancePropertyVariant(PropertyValueContainer(auxiliaryContainer.instanceId(),
                                                              propertyName,
                                                              auxiliaryContainer.value(),
                                                              auxiliaryContainer.dynamicTypeName()));
        } else {
            rootNodeInstance().resetProperty(propertyName);
        }
    }
}


QUrl NodeInstanceServer::fileUrl() const
{
    return m_fileUrl;
}

ServerNodeInstance NodeInstanceServer::activeStateInstance() const
{
    return m_activeStateInstance;
}

ServerNodeInstance NodeInstanceServer::rootNodeInstance() const
{
    return m_rootNodeInstance;
}

void NodeInstanceServer::setStateInstance(const ServerNodeInstance &stateInstance)
{
    m_activeStateInstance = stateInstance;
}

void NodeInstanceServer::clearStateInstance()
{
    m_activeStateInstance = ServerNodeInstance();
}

void NodeInstanceServer::timerEvent(QTimerEvent *event)
{
    if (event->timerId() == m_timer) {
        collectItemChangesAndSendChangeCommands();
    }

    NodeInstanceServerInterface::timerEvent(event);
}

NodeInstanceClientInterface *NodeInstanceServer::nodeInstanceClient() const
{
    return m_nodeInstanceClient;
}

static QVector<InformationContainer> createInformationVector(const QList<ServerNodeInstance> &instanceList, bool initial)
{
    QVector<InformationContainer> informationVector;

    foreach (const ServerNodeInstance &instance, instanceList) {
        if (instance.isValid()) {
            informationVector.append(InformationContainer(instance.instanceId(), Position, instance.position()));
            informationVector.append(InformationContainer(instance.instanceId(), Transform, instance.transform()));
            informationVector.append(InformationContainer(instance.instanceId(), SceneTransform, instance.sceneTransform()));
            informationVector.append(InformationContainer(instance.instanceId(), Size, instance.size()));
            informationVector.append(InformationContainer(instance.instanceId(), BoundingRect, instance.boundingRect()));
            informationVector.append(InformationContainer(instance.instanceId(), ContentItemBoundingRect, instance.contentItemBoundingRect()));
            informationVector.append(InformationContainer(instance.instanceId(), Transform, instance.transform()));
            informationVector.append(InformationContainer(instance.instanceId(), ContentTransform, instance.contentTransform()));
            informationVector.append(InformationContainer(instance.instanceId(), ContentItemTransform, instance.contentItemTransform()));
            informationVector.append(InformationContainer(instance.instanceId(), HasContent, instance.hasContent()));
            informationVector.append(InformationContainer(instance.instanceId(), IsMovable, instance.isMovable()));
            informationVector.append(InformationContainer(instance.instanceId(), IsResizable, instance.isResizable()));
            informationVector.append(InformationContainer(instance.instanceId(), IsInLayoutable, instance.isInLayoutable()));
            informationVector.append(InformationContainer(instance.instanceId(), PenWidth, instance.penWidth()));
            informationVector.append(InformationContainer(instance.instanceId(), IsAnchoredByChildren, instance.isAnchoredByChildren()));
            informationVector.append(InformationContainer(instance.instanceId(), IsAnchoredBySibling, instance.isAnchoredBySibling()));

            informationVector.append(InformationContainer(instance.instanceId(), HasAnchor, PropertyName("anchors.fill"), instance.hasAnchor("anchors.fill")));
            informationVector.append(InformationContainer(instance.instanceId(), HasAnchor, PropertyName("anchors.centerIn"), instance.hasAnchor("anchors.centerIn")));
            informationVector.append(InformationContainer(instance.instanceId(), HasAnchor, PropertyName("anchors.right"), instance.hasAnchor("anchors.right")));
            informationVector.append(InformationContainer(instance.instanceId(), HasAnchor, PropertyName("anchors.top"), instance.hasAnchor("anchors.top")));
            informationVector.append(InformationContainer(instance.instanceId(), HasAnchor, PropertyName("anchors.left"), instance.hasAnchor("anchors.left")));
            informationVector.append(InformationContainer(instance.instanceId(), HasAnchor, PropertyName("anchors.bottom"), instance.hasAnchor("anchors.bottom")));
            informationVector.append(InformationContainer(instance.instanceId(), HasAnchor, PropertyName("anchors.horizontalCenter"), instance.hasAnchor("anchors.horizontalCenter")));
            informationVector.append(InformationContainer(instance.instanceId(), HasAnchor, PropertyName("anchors.verticalCenter"), instance.hasAnchor("anchors.verticalCenter")));
            informationVector.append(InformationContainer(instance.instanceId(), HasAnchor, PropertyName("anchors.baseline"), instance.hasAnchor("anchors.baseline")));

            QPair<PropertyName, ServerNodeInstance> anchorPair = instance.anchor("anchors.fill");
            informationVector.append(InformationContainer(instance.instanceId(), Anchor, PropertyName("anchors.fill"), anchorPair.first, anchorPair.second.instanceId()));

            anchorPair = instance.anchor("anchors.centerIn");
            informationVector.append(InformationContainer(instance.instanceId(), Anchor, PropertyName("anchors.centerIn"), anchorPair.first, anchorPair.second.instanceId()));

            anchorPair = instance.anchor("anchors.right");
            informationVector.append(InformationContainer(instance.instanceId(), Anchor, PropertyName("anchors.right"), anchorPair.first, anchorPair.second.instanceId()));

            anchorPair = instance.anchor("anchors.top");
            informationVector.append(InformationContainer(instance.instanceId(), Anchor, PropertyName("anchors.top"), anchorPair.first, anchorPair.second.instanceId()));

            anchorPair = instance.anchor("anchors.left");
            informationVector.append(InformationContainer(instance.instanceId(), Anchor, PropertyName("anchors.left"), anchorPair.first, anchorPair.second.instanceId()));

            anchorPair = instance.anchor("anchors.bottom");
            informationVector.append(InformationContainer(instance.instanceId(), Anchor, PropertyName("anchors.bottom"), anchorPair.first, anchorPair.second.instanceId()));

            anchorPair = instance.anchor("anchors.horizontalCenter");
            informationVector.append(InformationContainer(instance.instanceId(), Anchor, PropertyName("anchors.horizontalCenter"), anchorPair.first, anchorPair.second.instanceId()));

            anchorPair = instance.anchor("anchors.verticalCenter");
            informationVector.append(InformationContainer(instance.instanceId(), Anchor, PropertyName("anchors.verticalCenter"), anchorPair.first, anchorPair.second.instanceId()));

            anchorPair = instance.anchor("anchors.baseline");
            informationVector.append(InformationContainer(instance.instanceId(), Anchor, PropertyName("anchors.baseline"), anchorPair.first, anchorPair.second.instanceId()));

            PropertyNameList propertyNames = instance.propertyNames();

            if (initial) {
                foreach (const PropertyName &propertyName,propertyNames)
                    informationVector.append(InformationContainer(instance.instanceId(), InstanceTypeForProperty, propertyName, instance.instanceType(propertyName)));
            }

            foreach (const PropertyName &propertyName,instance.propertyNames()) {
                bool hasChanged = false;
                bool hasBinding = instance.hasBindingForProperty(propertyName, &hasChanged);
                if (hasChanged)
                    informationVector.append(InformationContainer(instance.instanceId(), HasBindingForProperty, propertyName, hasBinding));
            }
        }
    }

    return informationVector;
}


ChildrenChangedCommand NodeInstanceServer::createChildrenChangedCommand(const ServerNodeInstance &parentInstance, const QList<ServerNodeInstance> &instanceList) const
{
    QVector<qint32> instanceVector;

    foreach (const ServerNodeInstance &instance, instanceList)
        instanceVector.append(instance.instanceId());

    return ChildrenChangedCommand(parentInstance.instanceId(), instanceVector, createInformationVector(instanceList, false));
}

InformationChangedCommand NodeInstanceServer::createAllInformationChangedCommand(const QList<ServerNodeInstance> &instanceList, bool initial) const
{
    return InformationChangedCommand(createInformationVector(instanceList, initial));
}

static bool supportedVariantType(int type)
{
    return type < int(QVariant::UserType) && type != QMetaType::QObjectStar
            && type != QMetaType::QModelIndex && type != QMetaType::VoidStar;
}

ValuesChangedCommand NodeInstanceServer::createValuesChangedCommand(const QList<ServerNodeInstance> &instanceList) const
{
    QVector<PropertyValueContainer> valueVector;

    foreach (const ServerNodeInstance &instance, instanceList) {
        foreach (const PropertyName &propertyName, instance.propertyNames()) {
            QVariant propertyValue = instance.property(propertyName);
            if (supportedVariantType(propertyValue.userType()))
                valueVector.append(PropertyValueContainer(instance.instanceId(), propertyName, propertyValue, PropertyName()));
        }
    }

    return ValuesChangedCommand(valueVector);
}

ComponentCompletedCommand NodeInstanceServer::createComponentCompletedCommand(const QList<ServerNodeInstance> &instanceList)
{
    QVector<qint32> idVector;
    foreach (const ServerNodeInstance &instance, instanceList) {
        if (instance.instanceId() >= 0)
            idVector.append(instance.instanceId());
    }

    return ComponentCompletedCommand(idVector);
}

ValuesChangedCommand NodeInstanceServer::createValuesChangedCommand(const QVector<InstancePropertyPair> &propertyList) const
{
    QVector<PropertyValueContainer> valueVector;

    foreach (const InstancePropertyPair &property, propertyList) {
        const PropertyName propertyName = property.second;
        const ServerNodeInstance instance = property.first;

        if (instance.isValid()) {
            QVariant propertyValue = instance.property(propertyName);
            if (QMetaType::isRegistered(propertyValue.userType()) && supportedVariantType(propertyValue.type())) {
                valueVector.append(PropertyValueContainer(instance.instanceId(), propertyName, propertyValue, PropertyName()));
            }
        }
    }

    return ValuesChangedCommand(valueVector);
}

QByteArray NodeInstanceServer::importCode() const
{
    return m_importCode;
}

QObject *NodeInstanceServer::dummyContextObject() const
{
    return m_dummyContextObject.data();
}

void NodeInstanceServer::notifyPropertyChange(qint32 instanceid, const PropertyName &propertyName)
{
    if (hasInstanceForId(instanceid))
        addChangedProperty(InstancePropertyPair(instanceForId(instanceid), propertyName));
}

void NodeInstanceServer::insertInstanceRelationship(const ServerNodeInstance &instance)
{
    Q_ASSERT(instance.isValid());
    Q_ASSERT(!m_idInstanceHash.contains(instance.instanceId()));
    Q_ASSERT(!m_objectInstanceHash.contains(instance.internalObject()));
    m_objectInstanceHash.insert(instance.internalObject(), instance);
    m_idInstanceHash.insert(instance.instanceId(), instance);
}

void NodeInstanceServer::removeInstanceRelationsip(qint32 instanceId)
{
    if (hasInstanceForId(instanceId)) {
        ServerNodeInstance instance = instanceForId(instanceId);
        if (instance.isValid())
            instance.setId(QString());
        m_idInstanceHash.remove(instanceId);
        m_objectInstanceHash.remove(instance.internalObject());
        instance.makeInvalid();
    }
}

PixmapChangedCommand NodeInstanceServer::createPixmapChangedCommand(const QList<ServerNodeInstance> &instanceList) const
{
    QVector<ImageContainer> imageVector;

    foreach (const ServerNodeInstance &instance, instanceList) {
        if (instance.isValid() && instance.hasContent())
            imageVector.append(ImageContainer(instance.instanceId(), instance.renderImage(), instance.instanceId()));
    }

    return PixmapChangedCommand(imageVector);
}

void NodeInstanceServer::loadDummyDataFile(const QFileInfo& qmlFileInfo)
{
    QQmlComponent component(engine(), qmlFileInfo.filePath());
    QObject *dummyData = component.create();
    if (component.isError()) {
        QList<QQmlError> errors = component.errors();
        foreach (const QQmlError &error, errors) {
            qWarning() << error;
        }
    }

    QVariant oldDummyDataObject = rootContext()->contextProperty(qmlFileInfo.completeBaseName());

    if (dummyData) {
        qDebug() << "Loaded dummy data:" << qmlFileInfo.filePath();
        rootContext()->setContextProperty(qmlFileInfo.completeBaseName(), dummyData);
        dummyData->setParent(this);
        m_dummyObjectList.append(DummyPair(qmlFileInfo.completeBaseName(), dummyData));
    }

    if (!oldDummyDataObject.isNull())
        delete oldDummyDataObject.value<QObject*>();

    if (!dummydataFileSystemWatcher()->files().contains(qmlFileInfo.filePath()))
        dummydataFileSystemWatcher()->addPath(qmlFileInfo.filePath());

    if (rootNodeInstance().isValid() && rootNodeInstance().internalObject()) {
        foreach (QQmlContext *context, allSubContextsForObject(rootNodeInstance().internalObject()))
            setupDummysForContext(context);
    }
}

void NodeInstanceServer::loadDummyContextObjectFile(const QFileInfo& qmlFileInfo)
{
    delete m_dummyContextObject.data();

    QQmlComponent component(engine(), qmlFileInfo.filePath());
    m_dummyContextObject = component.create();

    if (component.isError()) {
        QList<QQmlError> errors = component.errors();
        foreach (const QQmlError &error, errors) {
            qWarning() << error;
        }
    }

    if (m_dummyContextObject) {
        qWarning() << "Loaded dummy context object:" << qmlFileInfo.filePath();
        m_dummyContextObject->setParent(this);
    }

    if (!dummydataFileSystemWatcher()->files().contains(qmlFileInfo.filePath()))
        dummydataFileSystemWatcher()->addPath(qmlFileInfo.filePath());

    refreshBindings();
}

void NodeInstanceServer::loadDummyDataFiles(const QString& directory)
{
    QDir dir(directory, "*.qml");
    QList<QFileInfo> filePathList = dir.entryInfoList();
    foreach (const QFileInfo &qmlFileInfo, filePathList) {
        loadDummyDataFile(qmlFileInfo);
    }
}

void NodeInstanceServer::loadDummyDataContext(const QString& directory)
{
    QDir dir(directory+"/context", "*.qml");
    QList<QFileInfo> filePathList = dir.entryInfoList();
    QString baseName = QFileInfo(fileUrl().toLocalFile()).completeBaseName();
    foreach (const QFileInfo &qmlFileInfo, filePathList) {
        if (qmlFileInfo.completeBaseName() == baseName)
            loadDummyContextObjectFile(qmlFileInfo);
    }
}

void NodeInstanceServer::sendDebugOutput(DebugOutputCommand::Type type, const QString &message, qint32 instanceId)
{
    QVector<qint32> ids;
    ids.append(instanceId);
    sendDebugOutput(type, message, ids);
}

void NodeInstanceServer::sendDebugOutput(DebugOutputCommand::Type type, const QString &message, const QVector<qint32> &instanceIds)
{
    DebugOutputCommand command(message, type, instanceIds);
    nodeInstanceClient()->debugOutput(command);
}

void NodeInstanceServer::removeInstanceRelationsipForDeletedObject(QObject *object)
{
    if (m_objectInstanceHash.contains(object)) {
        ServerNodeInstance instance = instanceForObject(object);
        m_objectInstanceHash.remove(object);

        if (m_idInstanceHash.contains(instance.instanceId()))
            m_idInstanceHash.remove(instance.instanceId());
    }
}

QStringList NodeInstanceServer::dummyDataDirectories(const QString& directoryPath)
{
    QStringList dummyDataDirectoryList;
    QDir directory(directoryPath);
    while (true) {
        if (directory.isRoot() || !directory.exists())
            return dummyDataDirectoryList;

        if (directory.exists("dummydata"))
            dummyDataDirectoryList.prepend(directory.absoluteFilePath("dummydata"));

        directory.cdUp();
    }
}

}



