/**
  * @RDE_HEADER@
  * AvsApp
  * $Id$
  * $HeadURL$
  * $Author$
  * Created by Christian Fröbel, NLSE, 2018-04-16
  */

#pragma once

#include <Plugins/AudioVideoManagement/Shared/avmshared_export.h>
#include <QObject>
#include <QRect>
#include <boost/optional.hpp>

namespace LtsMultiMonitor
{
class FullscreenVideoDummyWidget;
}

namespace AudioVideoManagement
{

class AvaControl;

/**
 * Manages an AVS-dialog in a way that it will behave like an Excon-App.
 * When show() is called and the dialog is not visible yet, the Operator
 * needs to choose on which screen the App shall be placed.
 * The AVS-dialog will open in full-screen on the selected screen then.
 * You can call hide() explicitly in order to hide the App. But usually
 * this is done implicitly when a new App is placed ontop of this AvsApp.
 *
 * You can also call show(const QRect &geometry) in case you already know
 * where the app is to be placed and thus avoid the screen selection.
 *
 * @author Christian Fröbel
 */
class AVMSHARED_EXPORT AvsApp : public QObject
{
  Q_OBJECT

public:
  AvsApp(const QString &dialogId, AvaControl *avaControl);
  ~AvsApp() override;

  void show(const QVector<QWidget *> irreplacableWidgets = {});
  void show(const QRect &geometry);
  void hide(bool andClose = false);
  bool isVisible() const;
  bool isActive() const; // may be visible or hidden, but a ScreenPlaycementHelper is still there, so it might be hidden by the switcher

  /**
   * Release alls streams that might still be active in this app.
   * Will be called implicitly when the dialog is hidden.
   * But it can be called explicitly, e.g. when a PlaybackApp of Type Normal is released
   * in which case the App remaines visible (hide() is not called then).
   */
  void releaseStreams();

signals:
  void signalVisible();
  void signalPause();
  void signalResume();

private slots:
  void onWidgetPlaced(const QRect &geometry);
  void onPlacementHelperDestroyed();
  void onHideVideo();
  void onShowVideo();

private:
  void showAvsDialog(const QRect &geometry);
  void hideAvsDialog();
  void hideAndPauseAvsDialog();
  void showAndResumeAvsDialog();

  static const QString               ALL_STREAMS;
  const QString                      m_dialogId;
  AvaControl                        *m_avaControl;
  LtsMultiMonitor::FullscreenVideoDummyWidget   *m_screenPlacementHelper{nullptr};
  boost::optional<QRect>             m_presetGeometry;
  bool                               m_visible;
};

} // namespace AudioVideoManagement