/****************************************************************************
**
** Copyright (C) 2017 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of Qt 3D Studio.
**
** $QT_BEGIN_LICENSE:GPL-EXCEPT$
** 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.
**
** $QT_END_LICENSE$
**
****************************************************************************/

#include "ActionView.h"
#include "ActionContextMenu.h"
#include "ActionModel.h"
#include "CmdDataModelActionSetValue.h"
#include "ClientDataModelBridge.h"
#include "Core.h"
#include "Dialogs.h"
#include "Dispatch.h"
#include "Doc.h"
#include "IDocumentEditor.h"
#include "IDocumentReader.h"
#include "IObjectReferenceHelper.h"
#include "Literals.h"
#include "ObjectListModel.h"
#include "StudioUtils.h"
#include "StudioApp.h"
#include "StudioClipboard.h"
#include "StudioObjectTypes.h"
#include "StudioPreferences.h"
#include "Qt3DSFileTools.h"
#include "Qt3DSDMActionCore.h"
#include "Qt3DSDMDataTypes.h"
#include "Qt3DSDMSlides.h"

#include <QtCore/qcoreapplication.h>
#include <QtQml/qqmlcontext.h>
#include <QtQml/qqmlengine.h>
#include <QtCore/qtimer.h>
#include <QtWidgets/qdesktopwidget.h>

ActionView::ActionView(const QSize &preferredSize, QWidget *parent)
    : QQuickWidget(parent)
    , TabNavigable()
    , m_actionsModel(new ActionModel(this))
    , m_preferredSize(preferredSize)
{
    setResizeMode(QQuickWidget::SizeRootObjectToView);
    QTimer::singleShot(0, this, &ActionView::initialize);

    g_StudioApp.GetCore()->GetDispatch()->AddPresentationChangeListener(this);

    connect(this, &ActionView::actionChanged, this, [this] {
        if (!m_itemHandle.Valid())
            return;

        if (!m_propertyModel)
            m_propertyModel = new PropertyModel(this);

        const auto actionInfo = m_actionsModel->actionInfoAt(m_currentActionIndex);
        if (actionInfo.m_Handler == L"Set Property") {
            setPropertyValueInvalid(true);
            m_currentPropertyNameHandle = actionInfo.m_HandlerArgs.at(0);
            m_currentPropertyValueHandle = actionInfo.m_HandlerArgs.at(1);
            m_propertyModel->setAction(m_actionsModel->actionAt(m_currentActionIndex));
            m_propertyModel->setNameHandle(m_currentPropertyNameHandle);
            m_propertyModel->setValueHandle(m_currentPropertyValueHandle);
            m_currentPropertyIndex = m_propertyModel->defaultPropertyIndex();
            Q_EMIT propertyChanged();
            Q_EMIT propertyModelChanged();
            setPropertyValueInvalid(false);
        }
    });

    m_actionChangedCompressionTimer.setInterval(20);
    m_actionChangedCompressionTimer.setSingleShot(true);
    connect(&m_actionChangedCompressionTimer, &QTimer::timeout, this, [this] {
        updateHandlerArguments();
        updateFiredEvent();
        Q_EMIT actionChanged();
    });

    QString ctrlKey(QStringLiteral("Ctrl+"));
    QString shiftKey(QStringLiteral("Shift+"));
#ifdef Q_OS_MACOS
    ctrlKey = "⌘";
    shiftKey = "⇧";
#endif

    // These actions will be passed to the context menu. Some of them need to me members, as we
    // have to change their enabled state based on selection and previous actions.
    QAction *action = new QAction(tr("New Action\t%1A").arg(shiftKey));
    action->setShortcut(QKeySequence(Qt::SHIFT + Qt::Key_A));
    connect(action, &QAction::triggered, this, &ActionView::addAction);
    QQuickWidget::addAction(action);

    m_actionCopy = new QAction(tr("Copy Action\t%1C").arg(ctrlKey));
    connect(m_actionCopy, &QAction::triggered, this, &ActionView::copyAction);
    QQuickWidget::addAction(m_actionCopy);

    m_actionPaste = new QAction(tr("Paste Action\t%1V").arg(ctrlKey));
    connect(m_actionPaste, &QAction::triggered, this, &ActionView::pasteAction);
    QQuickWidget::addAction(m_actionPaste);

    m_actionCut = new QAction(tr("Cut Action\t%1X").arg(ctrlKey));
    connect(m_actionCut, &QAction::triggered, this, &ActionView::cutAction);
    QQuickWidget::addAction(m_actionCut);

    m_actionDel = new QAction(tr("Delete Action\tDel"));
    connect(m_actionDel, &QAction::triggered, [=](){ deleteAction(m_currentActionIndex); });
    QQuickWidget::addAction(m_actionDel);
}

ActionView::~ActionView()
{
}

QSize ActionView::sizeHint() const
{
    return m_preferredSize;
}

void ActionView::focusInEvent(QFocusEvent *event)
{
    updateActionStates();
    QQuickWidget::focusInEvent(event);
}

void ActionView::mousePressEvent(QMouseEvent *event)
{
    g_StudioApp.setLastActiveView(this);
    QQuickWidget::mousePressEvent(event);
}

bool ActionView::event(QEvent *event)
{
    if (event->type() == QEvent::ShortcutOverride) {
        QKeyEvent *ke = static_cast<QKeyEvent *>(event);
        if (m_currentActionIndex >= 0 && (ke->key() == Qt::Key_Delete
                                          || (ke->modifiers() == Qt::ControlModifier
                                              && (ke->key() == Qt::Key_C || ke->key() == Qt::Key_V
                                                  || ke->key() == Qt::Key_X)))) {
            auto focusItem = quickWindow()->activeFocusItem();
            if (focusItem && (focusItem->objectName() == QStringLiteral("actionListDelegate")
                              || focusItem->objectName() == QStringLiteral("focusEater"))) {
                if (ke->key() == Qt::Key_Delete) {
                    if (m_actionDel->isEnabled())
                        deleteAction(m_currentActionIndex);
                } else if (ke->modifiers() == Qt::ControlModifier) {
                    if (ke->key() == Qt::Key_C) {
                        if (m_actionCopy->isEnabled())
                            copyAction();
                    } else if (ke->key() == Qt::Key_V) {
                        if (m_actionPaste->isEnabled())
                            pasteAction();
                    } else if (ke->key() == Qt::Key_X) {
                        if (m_actionCut->isEnabled())
                            cutAction();
                    }
                }
                event->accept();
                return true;
            }
        }
    }
    return QQuickWidget::event(event);
}

void ActionView::setItem(const qt3dsdm::Qt3DSDMInstanceHandle &handle)
{
    if (!m_activeBrowser.isNull() && m_activeBrowser->isVisible()) {
        m_activeBrowser->close();
        m_activeBrowser.clear();
    }

    m_objRefHelper = GetDoc()->GetDataModelObjectReferenceHelper();
    m_itemHandle = handle;
    m_actionsModel->setInstanceHandle(handle);
    if (m_itemHandle.Valid() != m_hasItem) {
        m_hasItem = m_itemHandle.Valid();
        Q_EMIT hasItemChanged();
    }
    emitActionChanged();
    Q_EMIT itemChanged();
    Q_EMIT itemTextChanged();
}

QString ActionView::itemIcon() const
{
    if (!m_itemHandle.Valid())
        return QString();

    auto info = m_objRefHelper->GetInfo(m_itemHandle);
    return CStudioObjectTypes::GetNormalIconName(info.m_Type);
}

QString ActionView::itemText() const
{
    if (!m_itemHandle.Valid())
        return tr("No Object Selected");

    const auto data = m_objRefHelper->GetInfo(m_itemHandle);
    return data.m_Name.toQString();
}

QColor ActionView::itemColor() const
{
    if (!m_itemHandle.Valid())
        return Qt::white;

    auto info = m_objRefHelper->GetInfo(m_itemHandle);
    if (info.m_Master)
        return CStudioPreferences::masterColor();
    else
        return CStudioPreferences::textColor();
}

QAbstractItemModel *ActionView::actionsModel() const
{
    return m_actionsModel;
}

QAbstractItemModel *ActionView::propertyModel() const
{
    return m_propertyModel;
}

QString ActionView::targetObjectName() const
{
    if (!GetDoc()->IsValid() || !m_itemHandle.Valid())
        return QString();

    const auto actionInfo = m_actionsModel->actionInfoAt(m_currentActionIndex);

    const auto targetInstance =
            GetBridge()->GetInstance(actionInfo.m_Owner, actionInfo.m_TargetObject);

    QString targetName = targetInstance.Valid()
            ? GetBridge()->GetName(targetInstance).toQString()
            : tr("[Unknown Target]");

    return targetName;
}

QString ActionView::triggerObjectName() const
{
    if (!GetDoc()->IsValid() || !m_itemHandle.Valid())
        return QString();

    const auto actionInfo = m_actionsModel->actionInfoAt(m_currentActionIndex);

    const auto sourceInstance =
            GetBridge()->GetInstance(actionInfo.m_Owner, actionInfo.m_TriggerObject);

    QString sourceName = sourceInstance.Valid()
            ? GetBridge()->GetName(sourceInstance).toQString()
            : tr("[Unknown Source]");

    return sourceName;
}

QString ActionView::eventName() const
{
    if (!GetDoc()->IsValid() || !m_itemHandle.Valid())
        return QString();

    const auto actionInfo = m_actionsModel->actionInfoAt(m_currentActionIndex);
    const auto bridge = GetBridge();
    const auto eventHandle = bridge->ResolveEvent(actionInfo);
    const auto eventInfo = bridge->GetEventInfo(eventHandle);

    const QString formalName = QString::fromWCharArray(eventInfo.m_FormalName.wide_str());
    return formalName.isEmpty() ? tr("[Unknown Event]") : formalName;
}

QString ActionView::handlerName() const
{
    if (!GetDoc()->IsValid() || !m_itemHandle.Valid())
        return QString();

    const auto actionInfo = m_actionsModel->actionInfoAt(m_currentActionIndex);
    const auto bridge = GetBridge();
    const auto handlerHandle = bridge->ResolveHandler(actionInfo);

    if (handlerHandle.Valid()) {
        const auto handlerInfo = bridge->GetHandlerInfo(handlerHandle);
        return QString::fromWCharArray(handlerInfo.m_FormalName.wide_str());
    }

    return tr("[Unknown Handler]");
}

QVariantList ActionView::handlerArguments() const
{
    return m_handlerArguments;
}

PropertyInfo ActionView::property() const
{
    if (!m_propertyModel)
        return {};
    return m_propertyModel->property(m_currentPropertyIndex);
}

bool ActionView::isPropertyValueInvalid() const
{
    return m_propertyValueInvalid;
}

void ActionView::setCurrentActionIndex(int index)
{
    if (index == m_currentActionIndex)
        return;

    m_currentActionIndex = index;
    emitActionChanged();

    updateActionStates();
}

void ActionView::setCurrentPropertyIndex(int handle, int index)
{
    setPropertyValueInvalid(true);
    // Make sure propertymodel name & value handles are always up-to-date,
    // even when index is same as before
    m_currentPropertyValueHandle = 0;
    m_currentPropertyNameHandle = handle;
    for (int i = 0; i < m_handlerArguments.size(); ++i) {
        auto handlerArg = m_handlerArguments[i].value<HandlerArgument>();
        if (handlerArg.m_handle.GetHandleValue() == handle && i < m_handlerArguments.size() - 1) {
            m_currentPropertyValueHandle
                    = m_handlerArguments[i + 1].value<HandlerArgument>().m_handle;
            if (m_propertyModel) {
                m_propertyModel->setNameHandle(m_currentPropertyNameHandle);
                m_propertyModel->setValueHandle(m_currentPropertyValueHandle);
            }
        }
    }

    if (index == m_currentPropertyIndex)
        return;

    m_currentPropertyIndex = index;

    // set the property for the handler
    if (m_propertyModel && handle != 0) {
        qt3dsdm::SValue sValue(QVariant(m_propertyModel->property(index).m_nameId));
        qt3dsdm::SValue oldValue;
        GetDoc()->GetStudioSystem()->GetActionCore()->GetHandlerArgumentValue(handle, oldValue);

        if (!Equals(oldValue, sValue)) {
            CCmd *theCmd =
                    new CCmdDataModelActionSetArgumentValue(GetDoc(), handle, sValue);
            g_StudioApp.GetCore()->ExecuteCommand(theCmd);
        }
    }

    Q_EMIT propertyChanged();
    // Clear the value invalid flag asynchronously as the value doesn't actually change until
    // backend tells us it does
    QTimer::singleShot(0, this, &ActionView::clearPropertyValueInvalid);
}

void ActionView::addAction()
{
    if (m_itemHandle.Valid()) {
        // Query data model bridge to see the applicable events and actions for this instance.
        CClientDataModelBridge *theBridge = GetBridge();

        std::wstring theEventName = theBridge->GetDefaultEvent(m_itemHandle);
        std::wstring theHandlerName = theBridge->GetDefaultHandler(m_itemHandle);

        Q3DStudio::SCOPED_DOCUMENT_EDITOR(*GetDoc(), QObject::tr("Add Action"))
                ->AddAction(GetDoc()->GetActiveSlide(), m_itemHandle, theEventName,
                            theHandlerName);
    }
    updateActionStates();
}

void ActionView::deleteAction(int index)
{
    if (!m_itemHandle.Valid())
        return;

    const auto action = m_actionsModel->actionAt(index);
    if (action.Valid()) {
        Q3DStudio::SCOPED_DOCUMENT_EDITOR(*GetDoc(),
                                          QObject::tr("Delete Action"))->DeleteAction(action);
        emitActionChanged();
    }
    updateActionStates();
}

QObject *ActionView::showTriggerObjectBrowser(const QPoint &point)
{
    if (!m_itemHandle.Valid())
        return nullptr;

    if (!m_objectsModel) {
        m_objectsModel = new ObjectListModel(g_StudioApp.GetCore(),
                                             GetDoc()->GetSceneInstance(), this);
    }

    if (!m_triggerObjectBrowser)
        m_triggerObjectBrowser = new ObjectBrowserView(this);

    m_triggerObjectBrowser->setModel(m_objectsModel);

    const auto actionInfo = m_actionsModel->actionInfoAt(m_currentActionIndex);
    const auto instanceHandle = GetBridge()->GetInstance(actionInfo.m_Owner,
                                                         actionInfo.m_TriggerObject);
    m_triggerObjectBrowser->disconnect();
    m_triggerObjectBrowser->selectAndExpand(instanceHandle, actionInfo.m_Owner);
    CDialogs::showWidgetBrowser(this, m_triggerObjectBrowser, point);
    m_activeBrowser = m_triggerObjectBrowser;

    connect(m_triggerObjectBrowser, &ObjectBrowserView::selectionChanged,
            this, &ActionView::OnTriggerSelectionChanged);
    // update also pathtype in the trigger object when changed from UI
    connect(m_triggerObjectBrowser, &ObjectBrowserView::pathTypeChanged,
            this, &ActionView::OnTriggerSelectionChanged);

    return m_triggerObjectBrowser;
}

QObject *ActionView::showTargetObjectBrowser(const QPoint &point)
{
    if (!m_itemHandle.Valid())
        return nullptr;

    if (!m_objectsModel) {
        m_objectsModel = new ObjectListModel(g_StudioApp.GetCore(),
                                             GetDoc()->GetSceneInstance(), this);
    }

    if (!m_targetObjectBrowser)
        m_targetObjectBrowser = new ObjectBrowserView(this);

    m_targetObjectBrowser->setModel(m_objectsModel);

    const auto actionInfo = m_actionsModel->actionInfoAt(m_currentActionIndex);
    const auto instanceHandle = GetBridge()->GetInstance(actionInfo.m_Owner,
                                                         actionInfo.m_TargetObject);
    m_targetObjectBrowser->disconnect();
    m_targetObjectBrowser->selectAndExpand(instanceHandle, actionInfo.m_Owner);
    CDialogs::showWidgetBrowser(this, m_targetObjectBrowser, point);
    m_activeBrowser = m_targetObjectBrowser;

    connect(m_targetObjectBrowser, &ObjectBrowserView::selectionChanged,
            this, &ActionView::OnTargetSelectionChanged);
    // update also pathtype in the target object when changed from UI
    connect(m_targetObjectBrowser, &ObjectBrowserView::pathTypeChanged,
            this, &ActionView::OnTargetSelectionChanged);

    return m_targetObjectBrowser;
}

void ActionView::OnTargetSelectionChanged()
{
    auto selectedItem = m_targetObjectBrowser->selectedHandle();
    setTargetObject(m_objRefHelper->GetAssetRefValue(
                        selectedItem, m_itemHandle,
                        (CRelativePathTools::EPathType)(m_targetObjectBrowser->pathType())));
    resetFiredEvent();
}

void ActionView::OnTriggerSelectionChanged()
{
    auto selectedItem = m_triggerObjectBrowser->selectedHandle();
    setTriggerObject(m_objRefHelper->GetAssetRefValue(
                         selectedItem, m_itemHandle,
                         (CRelativePathTools::EPathType)(m_triggerObjectBrowser->pathType())));
    resetFiredEvent();
}

void ActionView::showContextMenu(int x, int y)
{
    updateActionStates();
    CActionContextMenu contextMenu(QQuickWidget::actions(), this);
    contextMenu.exec(mapToGlobal({x, y}));
}

QObject *ActionView::showEventBrowser(const QPoint &point)
{
    if (!m_itemHandle.Valid())
        return nullptr;

    const auto actionInfo = m_actionsModel->actionInfoAt(m_currentActionIndex);
    const auto bridge = GetBridge();
    const auto instanceHandle = bridge->GetInstance(actionInfo.m_Owner, actionInfo.m_TriggerObject);

    if (!instanceHandle.Valid())
        return nullptr;

    if (!m_eventsModel)
        m_eventsModel = new EventsModel(this);

    qt3dsdm::TEventHandleList eventList;
    bridge->GetEvents(instanceHandle, eventList);
    m_eventsModel->setEventList(eventList);

    if (!m_eventsBrowser)
        m_eventsBrowser = new EventsBrowserView(this);

    m_eventsBrowser->setModel(m_eventsModel);

    m_eventsBrowser->disconnect();
    m_eventsBrowser->selectAndExpand(QString::fromStdWString(actionInfo.m_Event));
    CDialogs::showWidgetBrowser(this, m_eventsBrowser, point);
    m_activeBrowser = m_eventsBrowser;

    connect(m_eventsBrowser, &EventsBrowserView::selectionChanged,
            this, [this] {
        if (m_eventsBrowser->canCommit())
            setEvent(qt3dsdm::Qt3DSDMEventHandle(m_eventsBrowser->selectedHandle()));
    });

    return m_eventsBrowser;
}

QObject *ActionView::showHandlerBrowser(const QPoint &point)
{
    if (!m_itemHandle.Valid())
        return nullptr;

    const auto actionInfo = m_actionsModel->actionInfoAt(m_currentActionIndex);
    const auto bridge = GetBridge();
    const auto instanceHandle = bridge->GetInstance(actionInfo.m_Owner, actionInfo.m_TargetObject);

    if (!instanceHandle.Valid())
        return nullptr;

    if (!m_handlersModel)
        m_handlersModel = new EventsModel(this);

    qt3dsdm::THandlerHandleList handlerList;
    bridge->GetHandlers(instanceHandle, handlerList);
    m_handlersModel->setHandlerList(handlerList);

    if (!m_handlerBrowser)
        m_handlerBrowser = new EventsBrowserView(this);

    m_handlerBrowser->setModel(m_handlersModel);

    m_handlerBrowser->disconnect();
    m_handlerBrowser->selectAndExpand(QString::fromStdWString(actionInfo.m_Handler));
    CDialogs::showWidgetBrowser(this, m_handlerBrowser, point);
    m_activeBrowser = m_handlerBrowser;

    connect(m_handlerBrowser, &EventsBrowserView::selectionChanged,
            this, [this] {
        if (m_handlerBrowser->canCommit())
            setHandler(qt3dsdm::Qt3DSDMHandlerHandle(m_handlerBrowser->selectedHandle()));
    });

    return m_handlerBrowser;
}

QObject *ActionView::showEventBrowserForArgument(int handle, const QPoint &point)
{
    if (!m_itemHandle.Valid())
        return nullptr;

    const auto actionInfo = m_actionsModel->actionInfoAt(m_currentActionIndex);
    const auto bridge = GetBridge();
    const auto instanceHandle = bridge->GetInstance(actionInfo.m_Owner, actionInfo.m_TargetObject);

    if (!instanceHandle.Valid())
        return nullptr;

    if (!m_fireEventsModel)
        m_fireEventsModel = new EventsModel(this);

    qt3dsdm::TEventHandleList eventList;
    bridge->GetEvents(instanceHandle, eventList);
    m_fireEventsModel->setEventList(eventList);

    if (!m_fireEventsBrowser)
        m_fireEventsBrowser = new EventsBrowserView(this);

    m_fireEventsBrowser->setModel(m_fireEventsModel);
    m_fireEventsBrowser->setHandle(handle);

    qt3dsdm::SValue oldValue;
    GetDoc()->GetStudioSystem()->GetActionCore()->GetHandlerArgumentValue(handle, oldValue);

    QString eventName;
    for (Qt3DSDMEventHandle eventHandle : eventList) {
        if (oldValue == eventHandle.GetHandleValue()) {
            qt3dsdm::SEventInfo eventInfo = bridge->GetEventInfo(eventHandle);
            eventName = QString::fromWCharArray(eventInfo.m_FormalName.wide_str());
            if (eventName.isEmpty())
                eventName = QString::fromWCharArray(eventInfo.m_Name.wide_str());
        }
    }
    m_fireEventsBrowser->disconnect();
    m_fireEventsBrowser->selectAndExpand(eventName);
    CDialogs::showWidgetBrowser(this, m_fireEventsBrowser, point);
    m_activeBrowser = m_fireEventsBrowser;

    connect(m_fireEventsBrowser, &EventsBrowserView::selectionChanged,
            this, [this, handle] {
        setArgumentValue(handle, qt3dsdm::Qt3DSDMEventHandle(
                             m_fireEventsBrowser->selectedHandle()).GetHandleValue());
    });

    return m_fireEventsBrowser;
}

void ActionView::updateFiredEvent()
{
    if (!m_itemHandle.Valid())
        return;

    const auto actionInfo = m_actionsModel->actionInfoAt(m_currentActionIndex);
    if (actionInfo.m_Handler != L"Fire Event") {
        m_firedEvent = tr("[Unknown event]");
        return;
    }

    const auto doc = GetDoc();
    if (!doc->IsValid())
        return;

    const auto bridge = GetBridge();
    const auto handlerHandle = bridge->ResolveHandler(actionInfo);
    IActionCore *actionCore = doc->GetStudioSystem()->GetActionCore();

    if (handlerHandle.Valid()) {
        for (const auto &argHandle: actionInfo.m_HandlerArgs) {
            const auto &argumentInfo = actionCore->GetHandlerArgumentInfo(argHandle);
            DataModelDataType::Value theArgType(GetValueType(argumentInfo.m_Value));
            SValue theArgValue(argumentInfo.m_Value);
            if (argumentInfo.m_ArgType == HandlerArgumentType::Event) {
                theArgType = DataModelDataType::String;
                auto theEventHandle = get<qt3ds::QT3DSI32>(argumentInfo.m_Value);
                theArgValue = SValue(std::make_shared<CDataStr>(
                                         bridge->GetEventInfo(theEventHandle).m_Name.wide_str()));
                m_firedEvent = theArgValue.toQVariant().toString();
                Q_EMIT firedEventChanged();
            }
        }
    }
}

void ActionView::updateFiredEventFromHandle(int handle)
{
    m_firedEvent = QString::fromWCharArray(
                GetBridge()->GetEventInfo(handle).m_FormalName.wide_str());
    Q_EMIT firedEventChanged();
}

void ActionView::resetFiredEvent()
{
    m_firedEvent = tr("[Unknown Event]");
    Q_EMIT firedEventChanged();
}

void ActionView::OnNewPresentation()
{
    // Register callback
    qt3dsdm::IStudioFullSystemSignalProvider *theSignalProvider =
            g_StudioApp.GetCore()->GetDoc()->GetStudioSystem()->GetFullSystemSignalProvider();
    m_connections.push_back(theSignalProvider->ConnectActionCreated(
                                std::bind(&ActionView::OnActionAdded, this,
                                          std::placeholders::_1,
                                          std::placeholders::_2, std::placeholders::_3)));
    m_connections.push_back(theSignalProvider->ConnectActionDeleted(
                                std::bind(&ActionView::OnActionDeleted, this,
                                          std::placeholders::_1,
                                          std::placeholders::_2, std::placeholders::_3)));
    m_connections.push_back(theSignalProvider->ConnectTriggerObjectSet(
                                std::bind(&ActionView::OnActionModified, this,
                                          std::placeholders::_1)));
    m_connections.push_back(theSignalProvider->ConnectTargetObjectSet(
                                std::bind(&ActionView::OnActionModified, this,
                                          std::placeholders::_1)));
    m_connections.push_back(theSignalProvider->ConnectEventSet(
                                std::bind(&ActionView::OnActionModified, this,
                                          std::placeholders::_1)));
    m_connections.push_back(theSignalProvider->ConnectHandlerSet(
                                std::bind(&ActionView::OnActionModified, this,
                                          std::placeholders::_1)));
    m_connections.push_back(theSignalProvider->ConnectHandlerArgumentValueSet(
                                std::bind(&ActionView::OnHandlerArgumentModified, this,
                                          std::placeholders::_1)));
    m_connections.push_back(theSignalProvider->ConnectInstancePropertyValue(
                                std::bind(&ActionView::OnInstancePropertyValueChanged, this,
                                          std::placeholders::_1,
                                          std::placeholders::_2)));
    m_connections.push_back(theSignalProvider->ConnectInstanceDeleted(
                                std::bind(&ActionView::OnInstanceDeleted, this,
                                          std::placeholders::_1)));
    CDispatch *theDispatch = g_StudioApp.GetCore()->GetDispatch();
    m_connections.push_back(theDispatch->ConnectSelectionChange(
                                std::bind(&ActionView::OnSelectionSet, this,
                                          std::placeholders::_1)));

    auto assetGraph = g_StudioApp.GetCore()->GetDoc()->GetAssetGraph();
    m_connections.push_back(assetGraph->ConnectChildAdded(
                std::bind(&ActionView::onAssetGraphChanged, this)));
    m_connections.push_back(assetGraph->ConnectChildRemoved(
                                std::bind(&ActionView::onAssetGraphChanged, this)));
}

void ActionView::OnClosingPresentation()
{
    m_connections.clear();
}

void ActionView::OnSelectionSet(Q3DStudio::SSelectedValue inSelectable)
{
    qt3dsdm::Qt3DSDMInstanceHandle theInstance;
    std::vector<qt3dsdm::Qt3DSDMInstanceHandle> instances;

    switch (inSelectable.getType()) {
    case Q3DStudio::SelectedValueTypes::Instance:
        theInstance = inSelectable.getData<qt3dsdm::Qt3DSDMInstanceHandle>();
        break;
    case Q3DStudio::SelectedValueTypes::MultipleInstances:
        instances = inSelectable.getData<std::vector<qt3dsdm::Qt3DSDMInstanceHandle>>();
        // handling only if we have one selected element.
        if (instances.size() == 1)
            theInstance = instances[0];
        break;
    case Q3DStudio::SelectedValueTypes::Slide: {
        qt3dsdm::Qt3DSDMSlideHandle theSlideHandle =
                inSelectable.getData<Q3DStudio::SSlideInstanceWrapper>().m_Slide;
        // Get the owning component instance
        CClientDataModelBridge *theBridge = GetBridge();
        qt3dsdm::SLong4 theComponentGuid = theBridge->GetComponentGuid(theSlideHandle);
        Q_ASSERT(theComponentGuid.Valid());
        theInstance = theBridge->GetInstanceByGUID(theComponentGuid);
        Q_ASSERT(theInstance.Valid());
    }
        break;
    default:
        // Clear selection on selecting other types or nothing at all
        break;
    };

    setItem(theInstance);
}

void ActionView::OnActionAdded(qt3dsdm::Qt3DSDMActionHandle inAction,
                               qt3dsdm::Qt3DSDMSlideHandle inSlide,
                               qt3dsdm::Qt3DSDMInstanceHandle inOwner)
{
    CDoc *theDoc = GetDoc();
    qt3dsdm::CStudioSystem *theStudioSystem = theDoc->GetStudioSystem();

    qt3dsdm::Qt3DSDMSlideHandle theCurrentSlide = theDoc->GetActiveSlide();
    qt3dsdm::Qt3DSDMSlideHandle theMasterSlideOfAction =
            theStudioSystem->GetSlideSystem()->GetMasterSlide(inSlide);
    qt3dsdm::Qt3DSDMSlideHandle theMasterOfCurrentSlide =
            theStudioSystem->GetSlideSystem()->GetMasterSlide(theCurrentSlide);

    if (!m_activeBrowser.isNull() && m_activeBrowser->isVisible()) {
        m_activeBrowser->close();
        m_activeBrowser.clear();
    }

    if (inOwner == m_itemHandle  // the action is added to current viewed instance
            && (theCurrentSlide == inSlide // and is added to the current viewed slide
                || (theMasterSlideOfAction == inSlide
                    && theMasterOfCurrentSlide == theMasterSlideOfAction))) {
        // or it is added to the master of the current viewed slide
        m_actionsModel->addAction(inAction);
    }
}

void ActionView::OnActionDeleted(qt3dsdm::Qt3DSDMActionHandle inAction,
                                 qt3dsdm::Qt3DSDMSlideHandle inSlide,
                                 qt3dsdm::Qt3DSDMInstanceHandle inOwner)
{
    Q_UNUSED(inSlide);
    Q_UNUSED(inOwner);

    if (!m_activeBrowser.isNull() && m_activeBrowser->isVisible()) {
        m_activeBrowser->close();
        m_activeBrowser.clear();
    }
    m_actionsModel->removeAction(inAction);
}

void ActionView::OnActionModified(qt3dsdm::Qt3DSDMActionHandle inAction)
{
    if (!m_itemHandle.Valid())
        return;

    if (GetDoc()->GetStudioSystem()->GetActionCore()->HandleValid(inAction)) {
        if (!m_activeBrowser.isNull() && m_activeBrowser->isVisible()) {
            const auto actionInfo = m_actionsModel->actionInfoAt(m_currentActionIndex);
            if (!actionInfo.m_Instance.Valid()) {
                m_activeBrowser->close();
                m_activeBrowser.clear();
            } else {
                // Update the selection in an active browser dialog
                if (m_activeBrowser == m_triggerObjectBrowser) {
                    const auto instanceHandle = GetBridge()->GetInstance(
                                actionInfo.m_Owner, actionInfo.m_TriggerObject);
                    m_triggerObjectBrowser->selectAndExpand(instanceHandle, actionInfo.m_Owner);
                } else if (m_activeBrowser == m_targetObjectBrowser) {
                    const auto instanceHandle = GetBridge()->GetInstance(
                                actionInfo.m_Owner, actionInfo.m_TargetObject);
                    m_targetObjectBrowser->selectAndExpand(instanceHandle, actionInfo.m_Owner);
                } else if (m_activeBrowser == m_eventsBrowser) {
                    m_eventsBrowser->selectAndExpand(QString::fromStdWString(actionInfo.m_Event));
                } else if (m_activeBrowser == m_handlerBrowser) {
                    m_handlerBrowser->selectAndExpand(
                                QString::fromStdWString(actionInfo.m_Handler));
                }
            }
        }
        m_actionsModel->updateAction(inAction);
        emitActionChanged();
    }
}

void ActionView::OnHandlerArgumentModified(qt3dsdm::Qt3DSDMHandlerArgHandle inHandlerArgument)
{
    if (!m_itemHandle.Valid())
        return;

    if (!m_fireEventsBrowser.isNull() && m_activeBrowser == m_fireEventsBrowser
            && m_activeBrowser->isVisible()) {
        const auto actionInfo = m_actionsModel->actionInfoAt(m_currentActionIndex);

        // m_fireEventsBrowser needs to be closed if another type of target handler is chosen.
        // Other browsers will remain valid always as long as the action is selected.
        if (actionInfo.m_Handler != L"Fire Event") {
            m_activeBrowser->close();
            m_activeBrowser.clear();
        } else {
            // Update the selection in an active browser dialog
            const auto bridge = GetBridge();
            const auto instanceHandle = bridge->GetInstance(actionInfo.m_Owner,
                                                            actionInfo.m_TargetObject);
            qt3dsdm::TEventHandleList eventList;
            bridge->GetEvents(instanceHandle, eventList);
            qt3dsdm::SValue value;
            GetDoc()->GetStudioSystem()->GetActionCore()->GetHandlerArgumentValue(
                        m_fireEventsBrowser->handle(), value);
            QString eventName;
            for (Qt3DSDMEventHandle eventHandle : eventList) {
                if (value == eventHandle.GetHandleValue()) {
                    qt3dsdm::SEventInfo eventInfo = bridge->GetEventInfo(eventHandle);
                    eventName = QString::fromWCharArray(eventInfo.m_FormalName.wide_str());
                    if (eventName.isEmpty())
                        eventName = QString::fromWCharArray(eventInfo.m_Name.wide_str());
                }
            }
            m_fireEventsBrowser->selectAndExpand(eventName);
        }
    }
    emitActionChanged();
}

void ActionView::OnInstancePropertyValueChanged(qt3dsdm::Qt3DSDMInstanceHandle inInstance,
                                                qt3dsdm::Qt3DSDMPropertyHandle inProperty)
{
    if (!m_itemHandle.Valid() || m_itemHandle != inInstance)
        return;

    auto bridge = g_StudioApp.GetCore()->GetDoc()->GetStudioSystem()->GetClientDataModelBridge();
    if (inProperty == bridge->GetNameProperty())
        Q_EMIT itemTextChanged();

    emitActionChanged();
}

void ActionView::OnInstanceDeleted(qt3dsdm::Qt3DSDMInstanceHandle inInstance)
{
    // Clear the model on instance deletion
    if (inInstance == m_itemHandle) {
        qt3dsdm::Qt3DSDMInstanceHandle noInstance;
        setItem(noInstance);
    }
}

void ActionView::copyAction()
{
    if (!m_itemHandle.Valid())
        return;

    auto theTempAPFile =
            GetDoc()->GetDocumentReader().CopyAction(m_actionsModel->actionAt(m_currentActionIndex),
                                                     GetDoc()->GetActiveSlide());
    Qt3DSFile theFile(theTempAPFile);
    CStudioClipboard::CopyActionToClipboard(theFile);
    updateActionStates();
}

void ActionView::cutAction()
{
    if (!m_itemHandle.Valid())
        return;

    copyAction();
    auto action = m_actionsModel->actionAt(m_currentActionIndex);
    Q3DStudio::SCOPED_DOCUMENT_EDITOR(*GetDoc(), QObject::tr("Cut Action"))->DeleteAction(action);
    updateActionStates();
}

void ActionView::pasteAction()
{
    if (!m_itemHandle.Valid())
        return;

    Qt3DSFile theTempAPFile = CStudioClipboard::GetActionFromClipboard();
    Q3DStudio::SCOPED_DOCUMENT_EDITOR(*GetDoc(), QObject::tr("Paste Action"))
            ->PasteAction(theTempAPFile.GetAbsolutePath(), m_itemHandle);
    updateActionStates();
}

void ActionView::setTriggerObject(const qt3dsdm::SObjectRefType &object)
{
    auto action = m_actionsModel->actionAt(m_currentActionIndex);
    if (!action.Valid())
        return;

    if (!m_triggerObjectBrowser.isNull() && m_triggerObjectBrowser->canCommit()) {
        auto core = g_StudioApp.GetCore();
        auto theBridge = GetBridge();

        auto theCmd = new CCmdDataModelActionSetTriggerObject(GetDoc(), action, object);
        const SActionInfo &theActionInfo
                = GetDoc()->GetStudioSystem()->GetActionCore()->GetActionInfo(action);

        Qt3DSDMInstanceHandle theBaseInstance = theActionInfo.m_Owner;
        Qt3DSDMInstanceHandle theObjectInstance = theBridge->GetInstance(theBaseInstance, object);
        Qt3DSDMInstanceHandle theOldInstance = theBridge->GetInstance(theBaseInstance,
                                                                      theActionInfo.m_TargetObject);
        // old instance and object instance could be the same, for example if user changes the type
        // from Absolute to Path. In this case we don't need to reset handler or event.
        if (theOldInstance != theObjectInstance) {
            theCmd->ResetEvent(
                        theBridge->GetDefaultEvent(theObjectInstance, theActionInfo.m_Event));
        }

        core->ExecuteCommand(theCmd);
    }
    emitActionChanged();
}

void ActionView::setTargetObject(const qt3dsdm::SObjectRefType &object)
{
    auto action = m_actionsModel->actionAt(m_currentActionIndex);
    if (!action.Valid())
        return;

    if (!m_targetObjectBrowser.isNull() && m_targetObjectBrowser->canCommit()) {
        auto core = g_StudioApp.GetCore();
        auto doc = GetDoc();
        auto theBridge = GetBridge();

        auto theCmd = new CCmdDataModelActionSetTargetObject(doc, action, object);
        const SActionInfo &theActionInfo = doc->GetStudioSystem()->GetActionCore()->GetActionInfo(
                    action);

        Qt3DSDMInstanceHandle theBaseInstance = theActionInfo.m_Owner;
        Qt3DSDMInstanceHandle theObjectInstance = theBridge->GetInstance(theBaseInstance, object);
        Qt3DSDMInstanceHandle theOldInstance = theBridge->GetInstance(theBaseInstance,
                                                                      theActionInfo.m_TargetObject);
        // old instance and object instance could be the same, for example if user changes the type
        // from Absolute to Path. In this case we don't need to reset handler or event.
        if (theOldInstance != theObjectInstance) {
            theCmd->ResetHandler(
                        theBridge->GetDefaultHandler(theObjectInstance, theActionInfo.m_Handler));
        }

        core->ExecuteCommand(theCmd);
    }
    emitActionChanged();
}

void ActionView::setEvent(const Qt3DSDMEventHandle &event)
{
    if (!event.Valid())
        return;

    auto doc = GetDoc();
    const auto action = m_actionsModel->actionAt(m_currentActionIndex);
    CCmd *theCmd = new CCmdDataModelActionSetEvent(doc, action,
                                                   doc->GetStudioSystem()
                                                   ->GetActionMetaData()
                                                   ->GetEventInfo(event)
                                                   ->m_Name.wide_str());
    g_StudioApp.GetCore()->ExecuteCommand(theCmd);
}

void ActionView::setHandler(const Qt3DSDMHandlerHandle &handler)
{
    if (!handler.Valid())
        return;

    auto doc = GetDoc();
    const auto action = m_actionsModel->actionAt(m_currentActionIndex);
    wstring handlerName(doc->GetStudioSystem()->GetActionMetaData()->GetHandlerInfo(handler)
                        ->m_Name.wide_str());
    CCmdDataModelActionSetHandler *theCmd =
            new CCmdDataModelActionSetHandler(doc, action, handlerName);
    theCmd->ResetHandler(handlerName); // reset the handler args

    g_StudioApp.GetCore()->ExecuteCommand(theCmd);
}

QVariant ActionView::handlerArgumentValue(int handle) const
{
    qt3dsdm::SValue value;
    GetDoc()->GetStudioSystem()->GetActionCore()->GetHandlerArgumentValue(handle, value);
    return value.toQVariant();
}

void ActionView::updateHandlerArguments()
{
    m_currentPropertyValueHandle = 0;
    m_currentPropertyNameHandle = 0;
    m_handlerArguments.clear();
    const auto doc = GetDoc();
    if (!doc->IsValid() || !m_itemHandle.Valid())
        return;

    const auto actionInfo = m_actionsModel->actionInfoAt(m_currentActionIndex);
    const auto bridge = GetBridge();
    const auto handlerHandle = bridge->ResolveHandler(actionInfo);
    IActionCore *actionCore = doc->GetStudioSystem()->GetActionCore();

    if (handlerHandle.Valid()) {
        auto newMetaData = doc->GetStudioSystem()->GetActionMetaData();

        for (const auto &argHandle: actionInfo.m_HandlerArgs) {
            const auto &argumentInfo = actionCore->GetHandlerArgumentInfo(argHandle);
            Option<SMetaDataHandlerArgumentInfo> argMetaData(
                        newMetaData->FindHandlerArgumentByName(handlerHandle, argumentInfo.m_Name));

            HandlerArgument argument;
            argument.m_handle = argHandle;
            argument.m_type = argMetaData->m_ArgType;
            argument.m_name = QString::fromWCharArray(argumentInfo.m_Name.wide_str());
            argument.m_value = argumentInfo.m_Value.toQVariant();
            argument.m_completeType = argMetaData->m_CompleteType;
            m_handlerArguments.append(QVariant::fromValue(argument));
        }
    }
}

void ActionView::emitActionChanged()
{
    m_actionChangedCompressionTimer.start();
}

void ActionView::setArgumentValue(int handle, const QVariant &value)
{
    if (!m_itemHandle.Valid())
        return;

    if (handle == 0)
        return;

    qt3dsdm::SValue sValue(value);
    qt3dsdm::SValue oldValue;
    GetDoc()->GetStudioSystem()->GetActionCore()->GetHandlerArgumentValue(handle, oldValue);

    if (!Equals(oldValue, sValue)) {
        CCmd *theCmd =
                new CCmdDataModelActionSetArgumentValue(GetDoc(), handle, sValue);
        g_StudioApp.GetCore()->ExecuteCommand(theCmd);
    }

    const auto actionInfo = m_actionsModel->actionInfoAt(m_currentActionIndex);
    if (actionInfo.m_Handler == L"Fire Event") {
        if (value.toInt())
            updateFiredEventFromHandle(value.toInt());
    }
}

CDoc *ActionView::GetDoc()
{
    return g_StudioApp.GetCore()->GetDoc();
}

CClientDataModelBridge *ActionView::GetBridge()
{
    return GetDoc()->GetStudioSystem()->GetClientDataModelBridge();
}

void ActionView::initialize()
{
    CStudioPreferences::setQmlContextProperties(rootContext());
    rootContext()->setContextProperty(QStringLiteral("_parentView"), this);
    rootContext()->setContextProperty(QStringLiteral("_resDir"), StudioUtils::resourceImageUrl());
    rootContext()->setContextProperty(QStringLiteral("_tabOrderHandler"), tabOrderHandler());
    rootContext()->setContextProperty(QStringLiteral("_mouseHelper"), &m_mouseHelper);
    m_mouseHelper.setWidget(this);

    QString shiftKey(QStringLiteral("Shift+"));
#ifdef Q_OS_MACOS
    shiftKey = "⇧";
#endif
    rootContext()->setContextProperty(QStringLiteral("_shiftKey"), shiftKey);
    qmlRegisterUncreatableType<qt3dsdm::HandlerArgumentType>(
                "Qt3DStudio", 1, 0, "HandlerArgumentType",
                QStringLiteral("HandlerArgumentType is an enum container"));
    qmlRegisterUncreatableType<qt3dsdm::DataModelDataType>(
                "Qt3DStudio", 1, 0, "DataModelDataType",
                QStringLiteral("DataModelDataType is an enum container"));
    qmlRegisterUncreatableType<qt3dsdm::AdditionalMetaDataType>(
                "Qt3DStudio", 1, 0, "AdditionalMetaDataType",
                QStringLiteral("AdditionalMetaDataType is an enum container"));
    qmlRegisterUncreatableType<PropertyInfo>(
                "Qt3DStudio", 1, 0, "PropertyInfo",
                QStringLiteral("PropertyInfo is not creatable in QML"));
    qmlRegisterUncreatableType<qt3dsdm::CompleteMetaDataType>(
                "Qt3DStudio", 1, 0, "CompleteMetaDataType",
                QStringLiteral("CompleteMetaDataType is an enum container"));
    engine()->addImportPath(StudioUtils::qmlImportPath());
    setSource(QUrl(QStringLiteral("qrc:/Palettes/Action/ActionView.qml")));
}

QStringList ActionView::slideNames()
{
    if (!m_itemHandle.Valid())
        return {};

    std::list<Q3DStudio::CString> outSlideNames;
    QStringList slideNames;
    CClientDataModelBridge *theBridge = GetBridge();
    const auto action = m_actionsModel->actionAt(m_currentActionIndex);

    theBridge->GetSlideNamesOfAction(action, outSlideNames);

    for (auto slideName : outSlideNames)
        slideNames.append(slideName.toQString());

    return slideNames;
}

int ActionView::slideNameToIndex(const QString &name)
{
    const auto slides = slideNames(); // KDAB_TODO cache it
    return slides.indexOf(name);
}

bool ActionView::toolTipsEnabled()
{
    return CStudioPreferences::ShouldShowTooltips();
}

QColor ActionView::showColorDialog(const QColor &color)
{
    m_currentColor = color;
    CDialogs *dialogs = g_StudioApp.GetDialogs();
    connect(dialogs, &CDialogs::onColorChanged, this, &ActionView::dialogCurrentColorChanged);
    QColor currentColor = dialogs->displayColorDialog(color);
    disconnect(dialogs, &CDialogs::onColorChanged, this, &ActionView::dialogCurrentColorChanged);
    return currentColor;
}

void ActionView::updateActionStates()
{
    bool hasValidAction = (m_currentActionIndex != -1) && m_itemHandle.Valid();
    m_actionCopy->setEnabled(hasValidAction);
    m_actionCut->setEnabled(hasValidAction);
    m_actionDel->setEnabled(hasValidAction);
    // Allow paste action even if item is not valid (list of actions is empty)
    m_actionPaste->setEnabled(CStudioClipboard::CanPasteAction());
}

// m_propertyValueInvalid flag indicates that property value is changing and
// may not be valid if queried at the moment. It is used to prevent QML errors
// about invalid value types when changing property handlers.
void ActionView::setPropertyValueInvalid(bool invalid)
{
    if (invalid != m_propertyValueInvalid) {
        m_propertyValueInvalid = invalid;
        Q_EMIT propertyValueInvalidChanged();
    }
}

// This is used to set m_propertyValueInvalid to false asynchronously
void ActionView::clearPropertyValueInvalid()
{
    setPropertyValueInvalid(false);
}

void ActionView::onAssetGraphChanged()
{
    // Changes to asset graph invalidate the object browser model, so close it if it is open
    if (!m_activeBrowser.isNull() && m_activeBrowser->isVisible()
            && (m_activeBrowser == m_targetObjectBrowser
                || m_activeBrowser == m_triggerObjectBrowser)) {
        m_activeBrowser->close();
        m_activeBrowser.clear();
    }
}