/***************************************************************************
 *   Copyright (c) 2004 Jürgen Riegel <juergen.riegel@web.de>              *
 *                                                                         *
 *   This file is part of the FreeCAD CAx development system.              *
 *                                                                         *
 *   This library is free software; you can redistribute it and/or         *
 *   modify it under the terms of the GNU Library General Public           *
 *   License as published by the Free Software Foundation; either          *
 *   version 2 of the License, or (at your option) any later version.      *
 *                                                                         *
 *   This library  is distributed in the hope that it will be useful,      *
 *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
 *   GNU Library General Public License for more details.                  *
 *                                                                         *
 *   You should have received a copy of the GNU Library General Public     *
 *   License along with this library; see the file COPYING.LIB. If not,    *
 *   write to the Free Software Foundation, Inc., 59 Temple Place,         *
 *   Suite 330, Boston, MA  02111-1307, USA                                *
 *                                                                         *
 ***************************************************************************/


#ifndef APPLICATION_H
#define APPLICATION_H

#include <QPixmap>
#include <map>
#include <string>

#include <App/Application.h>

#include "StyleParameters/ParameterManager.h"

class QCloseEvent;
class SoNode;
class NavlibInterface;

namespace Gui
{
class ApplicationPy;
class BaseView;
class CommandManager;
class Document;
class MacroManager;
class MDIView;
class MainWindow;
class MenuItem;
class PreferencePackManager;
class ViewProvider;
class ViewProviderDocumentObject;

/** The Application main class
 * This is the central class of the GUI
 * @author Jürgen Riegel, Werner Mayer
 */
class GuiExport Application
{
public:
    enum Status
    {
        UserInitiatedOpenDocument = 0
    };

    /// construction
    explicit Application(bool GUIenabled);
    /// destruction
    ~Application();

    /// Initializes default configuration for Style Parameter Manager
    void initStyleParameterManager();

    /** @name methods for support of files */
    //@{
    /// open a file
    void open(const char* FileName, const char* Module);
    /// import a file into the document DocName
    void importFrom(const char* FileName, const char* DocName, const char* Module);
    /// Export objects from the document DocName to a single file
    void exportTo(const char* FileName, const char* DocName, const char* Module);
    /// Reload a partial opened document
    App::Document* reopen(App::Document* doc);
    /// Prompt about recomputing if needed
    static void checkForRecomputes();
    /// Prompt about PartialRestore
    void checkPartialRestore(App::Document* doc);
    /// Prompt for Errors on open
    void checkRestoreError(App::Document* doc);
    //@}


    /** @name methods for View handling */
    //@{
    /// send Messages to the active view
    bool sendMsgToActiveView(const char* pMsg, const char** ppReturn = nullptr);
    /// send Messages test to the active view
    bool sendHasMsgToActiveView(const char* pMsg);
    /// send Messages to the focused view
    bool sendMsgToFocusView(const char* pMsg, const char** ppReturn = nullptr);
    /// send Messages test to the focused view
    bool sendHasMsgToFocusView(const char* pMsg);
    /// Attach a view (get called by the FCView constructor)
    void attachView(Gui::BaseView* pcView);
    /// Detach a view (get called by the FCView destructor)
    void detachView(Gui::BaseView* pcView);
    /// get called if a view gets activated, this manage the whole activation scheme
    void viewActivated(Gui::MDIView* pcView);
    /// get called if a view gets closed
    void viewClosed(Gui::MDIView* pcView);
    /// call update to all documents and all views (costly!)
    void onUpdate();
    /// call update to all views of the active document
    void updateActive();
    /// call update to all command actions
    void updateActions(bool delay = false);
    //@}

    /** @name Signals of the Application */
    //@{
    /// signal on new Document
    fastsignals::signal<void(const Gui::Document&, bool)> signalNewDocument;
    /// signal on deleted Document
    fastsignals::signal<void(const Gui::Document&)> signalDeleteDocument;
    /// signal on relabeling Document
    fastsignals::signal<void(const Gui::Document&)> signalRelabelDocument;
    /// signal on renaming Document
    fastsignals::signal<void(const Gui::Document&)> signalRenameDocument;
    /// signal on activating Document
    fastsignals::signal<void(const Gui::Document&)> signalActiveDocument;
    /// signal on new Object
    fastsignals::signal<void(const Gui::ViewProvider&)> signalNewObject;
    /// signal on deleted Object
    fastsignals::signal<void(const Gui::ViewProvider&)> signalDeletedObject;
    /// signal on changed Object
    fastsignals::signal<void(const Gui::ViewProvider&, const App::Property&)> signalBeforeChangeObject;
    /// signal on changed object property
    fastsignals::signal<void(const Gui::ViewProvider&, const App::Property&)> signalChangedObject;
    /// signal on renamed Object
    fastsignals::signal<void(const Gui::ViewProvider&)> signalRelabelObject;
    /// signal on activated Object
    fastsignals::signal<void(const Gui::ViewProvider&)> signalActivatedObject;
    /// signal on activated workbench
    fastsignals::signal<void(const char*)> signalActivateWorkbench;
    /// signal on added/removed workbench
    fastsignals::signal<void()> signalRefreshWorkbenches;
    /// signal on show hidden items
    fastsignals::signal<void(const Gui::Document&)> signalShowHidden;
    /// signal on activating view
    fastsignals::signal<void(const Gui::MDIView*)> signalActivateView;
    /// signal on closing view
    fastsignals::signal<void(const Gui::MDIView*)> signalCloseView;
    /// signal on entering in edit mode
    fastsignals::signal<void(const Gui::ViewProviderDocumentObject&)> signalInEdit;
    /// signal on leaving edit mode
    fastsignals::signal<void(const Gui::ViewProviderDocumentObject&)> signalResetEdit;
    /// signal on activated view-provider (active-object change, e.g. "pdbody", "part")
    fastsignals::signal<void(const Gui::ViewProviderDocumentObject*, const char*)>
        signalActivatedViewProvider;
    /// signal on changing user edit mode
    fastsignals::signal<void(int)> signalUserEditModeChanged;
    //@}

    /** @name methods for Document handling */
    //@{
protected:
    /// Observer message from the Application
    void slotNewDocument(const App::Document&, bool);
    void slotDeleteDocument(const App::Document&);
    void slotRelabelDocument(const App::Document&);
    void slotRenameDocument(const App::Document&);
    void slotActiveDocument(const App::Document&);
    void slotShowHidden(const App::Document&);
    void slotNewObject(const ViewProvider&);
    void slotDeletedObject(const ViewProvider&);
    void slotChangedObject(const ViewProvider&, const App::Property& Prop);
    void slotRelabelObject(const ViewProvider&);
    void slotActivatedObject(const ViewProvider&);
    void slotInEdit(const Gui::ViewProviderDocumentObject&);
    void slotResetEdit(const Gui::ViewProviderDocumentObject&);
    void slotActivatedViewProvider(const Gui::ViewProviderDocumentObject*, const char*);

public:
    /// message when a GuiDocument is about to vanish
    void onLastWindowClosed(Gui::Document* pcDoc);
    /// Getter for the active document
    Gui::Document* activeDocument() const;
    /// Set the active document
    void setActiveDocument(Gui::Document* pcDocument);
    /// Getter for the editing document
    Gui::Document* editDocument() const;
    Gui::MDIView* editViewOfNode(SoNode* node) const;
    /// Set editing document, which will reset editing of all other document
    void setEditDocument(Gui::Document* pcDocument);
    /** Retrieves a pointer to the Gui::Document whose App::Document has the name \a name.
     * If no such document exists 0 is returned.
     */
    Gui::Document* getDocument(const char* name) const;
    /** Retrieves a pointer to the Gui::Document whose App::Document matches to \a pDoc.
     * If no such document exists 0 is returned.
     */
    Gui::Document* getDocument(const App::Document* pDoc) const;
    /// Getter for the active view of the active document or null
    Gui::MDIView* activeView() const;
    /// Activate a view of the given type of the active document
    void activateView(const Base::Type&, bool create = false);
    /// Shows the associated view provider of the given object
    void showViewProvider(const App::DocumentObject*);
    /// Hides the associated view provider of the given object
    void hideViewProvider(const App::DocumentObject*);
    /// Get the view provider of the given object
    Gui::ViewProvider* getViewProvider(const App::DocumentObject*) const;
    /// Get the type safe view provider of the given object
    template<typename T>
    T* getViewProvider(const App::DocumentObject* obj) const
    {
        return freecad_cast<T*>(getViewProvider(obj));
    }
    //@}

    /// true when the application shutting down
    bool isClosing();

    void checkForDeprecatedSettings();
    void checkForPreviousCrashes();

    /** @name workbench handling */
    //@{
    /// Activate a named workbench
    bool activateWorkbench(const char* name);
    QPixmap workbenchIcon(const QString&) const;
    QString workbenchToolTip(const QString&) const;
    QString workbenchMenuText(const QString&) const;
    QStringList workbenches() const;
    void setupContextMenu(const char* recipient, MenuItem*) const;
    //@}

    /** @name Appearance */
    //@{
    /// Activate a stylesheet
    void setStyleSheet(const QString& qssFile, bool tiledBackground);
    void reloadStyleSheet();
    QString replaceVariablesInQss(const QString& qssText);

    /// Set QStyle by name
    void setStyle(const QString& name);
    //@}

    /** @name User Commands */
    //@{
    /// Get macro manager
    Gui::MacroManager* macroManager();
    /// Reference to the command manager
    Gui::CommandManager& commandManager();
    /// helper which create the commands
    void createStandardOperations();
    //@}

    Gui::PreferencePackManager* prefPackManager();
    Gui::StyleParameters::ParameterManager* styleParameterManager();

    /** @name Init, Destruct an Access methods */
    //@{
    /// some kind of singleton
    static Application* Instance;
    static void initApplication();
    static void initTypes();
    static void initOpenInventor();
    static void runInitGuiScript();
    static void runApplication();
    void tryClose(QCloseEvent* e);
    //@}

    /// get verbose DPI and style info
    static void getVerboseDPIStyleInfo(QTextStream& str);

    /// whenever GUI is about to start with the main window hidden
    static bool hiddenMainWindow();
    /// return the status bits
    bool testStatus(Status pos) const;
    /// set the status bits
    void setStatus(Status pos, bool on);

    /** @name User edit mode */
    //@{
protected:
    // the below std::map is a translation of 'EditMode' enum in ViewProvider.h
    // to add a new edit mode, it should first be added there
    // this is only used for GUI user interaction (menu, toolbar, Python API)
    const std::map<int, std::pair<std::string, std::string>> userEditModes {
        {0,
         std::make_pair(
             QT_TRANSLATE_NOOP("EditMode", "&Default"),
             QT_TRANSLATE_NOOP(
                 "EditMode",
                 "The object will be edited using the mode defined internally to be "
                 "the most appropriate for the object type"
             )
         )},
        {1,
         std::make_pair(
             QT_TRANSLATE_NOOP("EditMode", "Trans&form"),
             QT_TRANSLATE_NOOP(
                 "EditMode",
                 "The object will have its placement editable with the "
                 "Std TransformManip command"
             )
         )},
        {2,
         std::make_pair(
             QT_TRANSLATE_NOOP("EditMode", "Cu&tting"),
             QT_TRANSLATE_NOOP(
                 "EditMode",
                 "This edit mode is implemented as available but "
                 "currently does not seem to be used by any object"
             )
         )},
        {3,
         std::make_pair(
             QT_TRANSLATE_NOOP("EditMode", "&Color"),
             QT_TRANSLATE_NOOP(
                 "EditMode",
                 "The object will have the color of its individual faces "
                 "editable with the Appearance per Face command"
             )
         )},
    };
    int userEditMode = userEditModes.begin()->first;

public:
    std::map<int, std::pair<std::string, std::string>> listUserEditModes() const
    {
        return userEditModes;
    }
    int getUserEditMode(const std::string& mode = "") const;
    std::pair<std::string, std::string> getUserEditModeUIStrings(int mode = -1) const;
    bool setUserEditMode(int mode);
    bool setUserEditMode(const std::string& mode);
    //@}

private:
    struct ApplicationP* d;
    /// workbench python dictionary
    PyObject* _pcWorkbenchDictionary;
    NavlibInterface* pNavlibInterface;

    friend class ApplicationPy;
};

}  // namespace Gui

#endif