/*

Copyright (C) 2011-2019 Michael Goffioul

This file is part of Octave.

Octave is free software: you can redistribute it and/or modify it
under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.

Octave 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 General Public License for more details.

You should have received a copy of the GNU General Public License
along with Octave; see the file COPYING.  If not, see
<https://www.gnu.org/licenses/>.

*/

#if defined (HAVE_CONFIG_H)
#  include "config.h"
#endif

#include <QApplication>
#include <QThread>

#include "event-manager.h"
#include "graphics.h"

#include "Backend.h"
#include "ButtonGroup.h"
#include "CheckBoxControl.h"
#include "ContextMenu.h"
#include "EditControl.h"
#include "Figure.h"
#include "ListBoxControl.h"
#include "Logger.h"
#include "Menu.h"
#include "ObjectFactory.h"
#include "ObjectProxy.h"
#include "Panel.h"
#include "PopupMenuControl.h"
#include "PushButtonControl.h"
#include "PushTool.h"
#include "RadioButtonControl.h"
#include "SliderControl.h"
#include "Table.h"
#include "TextControl.h"
#include "ToggleButtonControl.h"
#include "ToggleTool.h"
#include "ToolBar.h"
#include "QtHandlesUtils.h"

namespace QtHandles
{

  ObjectFactory*
  ObjectFactory::instance (void)
  {
    static ObjectFactory s_instance;
    static bool s_instanceCreated = false;

    if (! s_instanceCreated)
      {
        if (QThread::currentThread () != QApplication::instance ()->thread ())
          s_instance.moveToThread (QApplication::instance ()->thread ());
        s_instanceCreated = true;
      }

    return &s_instance;
  }

  void
  ObjectFactory::createObject (Backend *backend, double handle)
  {
    gh_manager::auto_lock lock;

    graphics_object go (gh_manager::get_object (graphics_handle (handle)));

    if (go.valid_object ())
      {
        if (go.get_properties ().is_beingdeleted ())
          qWarning ("ObjectFactory::createObject: object is being deleted");
        else
          {
            ObjectProxy *proxy = Backend::toolkitObjectProxy (go);

            if (proxy)
              {
                Logger::debug ("ObjectFactory::createObject: "
                               "create %s from thread %08x",
                               go.type ().c_str (), QThread::currentThreadId ());

                Object *obj = nullptr;

                if (go.isa ("figure"))
                  obj = Figure::create (go);
                else if (go.isa ("uicontrol"))
                  {
                    uicontrol::properties& up =
                      Utils::properties<uicontrol> (go);

                    if (up.style_is ("pushbutton"))
                      obj = PushButtonControl::create (go);
                    else if (up.style_is ("edit"))
                      obj = EditControl::create (go);
                    else if (up.style_is ("checkbox"))
                      obj = CheckBoxControl::create (go);
                    else if (up.style_is ("radiobutton"))
                      obj = RadioButtonControl::create (go);
                    else if (up.style_is ("togglebutton"))
                      obj = ToggleButtonControl::create (go);
                    else if (up.style_is ("text"))
                      obj = TextControl::create (go);
                    else if (up.style_is ("popupmenu"))
                      obj = PopupMenuControl::create (go);
                    else if (up.style_is ("slider"))
                      obj = SliderControl::create (go);
                    else if (up.style_is ("listbox"))
                      obj = ListBoxControl::create (go);
                  }
                else if (go.isa ("uibuttongroup"))
                  obj = ButtonGroup::create (go);
                else if (go.isa ("uipanel"))
                  obj = Panel::create (go);
                else if (go.isa ("uimenu"))
                  obj = Menu::create (go);
                else if (go.isa ("uicontextmenu"))
                  obj = ContextMenu::create (go);
                else if (go.isa ("uitable"))
                  obj = Table::create (go);
                else if (go.isa ("uitoolbar"))
                  obj = ToolBar::create (go);
                else if (go.isa ("uipushtool"))
                  obj = PushTool::create (go);
                else if (go.isa ("uitoggletool"))
                  obj = ToggleTool::create (go);
                else
                  qWarning ("ObjectFactory::createObject: unsupported type '%s'",
                            go.type ().c_str ());

                if (obj)
                  {
                    proxy->setObject (obj);

                    connect (obj,
                             SIGNAL (interpreter_event (const octave::fcn_callback&)),
                             backend,
                             SLOT (interpreter_event (const octave::meth_callback&)));
                  }
              }
            else
              qWarning ("ObjectFactory::createObject: no proxy for handle %g",
                        handle);
          }
      }
    else
      qWarning ("ObjectFactory::createObject: invalid object for handle %g",
                handle);
  }

};