/*
 Copyright 2020-2021 Brad Parker

   Licensed under the Apache License, Version 2.0 (the "License");
   you may not use this file except in compliance with the License.
   You may obtain a copy of the License at

       http://www.apache.org/licenses/LICENSE-2.0

   Unless required by applicable law or agreed to in writing, software
   distributed under the License is distributed on an "AS IS" BASIS,
   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   See the License for the specific language governing permissions and
   limitations under the License.
*/

#ifndef __MAINWINDOW_H_
#define __MAINWINDOW_H_
#include <QOpenGLWidget>
#include <QQueue>
#include <QOpenGLFunctions>
#include <QSettings>

#ifndef NO_SOUND
#include <QAudio>

class QAudioOutput;
class QAudioFormat;
#endif

class Core;
class QPaintEvent;
class QCloseEvent;
class QKeyEvent;
class QMouseEvent;
class QOpenGLFramebufferObject;
class CoreOptionsDialog;

// you will have no vsync when just using a QMainWindow instead of a QOpenGLWidget
class MainWindow : public QOpenGLWidget, protected QOpenGLFunctions {
  Q_OBJECT
public:
  MainWindow(QWidget *parent = nullptr);
  ~MainWindow();
  void setCorePath(QString path);
  void setCoreMuted(bool on);
  void setROMPath(QString path);
  void setFullScreen(bool on);
  static MainWindow* instance();
  void openCoreOptionsDialog();
signals:
  void audioStreamReady();
public slots:
  void loadCore();
  void loadContent();
  void onAudioSample(int16_t left, int16_t right);
  void onAudioSampleBatch(const int16_t *data, size_t frames);
  void go();
  void saveState();
  void loadState();
  void saveCoreOptions();
private slots:
#ifndef NO_SOUND
  void startAudio(QAudioFormat *format);
  void audioStateChanged(QAudio::State state);
#endif
  void onCoreOptionsChanged();

private:
  Core *m_core;
#ifndef NO_SOUND
  QAudioOutput *m_audioOutput;
#endif
  bool m_audioReady;
  QIODevice *m_audioStream;
  QString m_corePath;
  QString m_romPath;
  CoreOptionsDialog *m_coreOptionsDialog;
  QSettings m_settings;

protected:
  void paintEvent(QPaintEvent *e) override;
  void keyPressEvent(QKeyEvent *e) override;
  void keyReleaseEvent(QKeyEvent *e) override;
  void mouseMoveEvent(QMouseEvent *e) override;
  void mousePressEvent(QMouseEvent *e) override;
  void mouseReleaseEvent(QMouseEvent *e) override;
  void closeEvent(QCloseEvent *e) override;
  // the base GL function implementations actually do nothing
  void initializeGL() override;
  void paintGL() override;
  void resizeGL(int w, int h) override;
};
#endif // __MAINWINDOW_H_