// Copyright (C) 2017 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause

#ifndef MAINWIDGET_H
#define MAINWIDGET_H

#include <QAudioDevice>
#include <QIcon>
#include <QWidget>

class Engine;
class FrequencySpectrum;
class LevelMeter;
class ProgressBar;
class SettingsDialog;
class Spectrograph;
class ToneGeneratorDialog;
class Waveform;

QT_BEGIN_NAMESPACE
class QAction;
class QAudioFormat;
class QLabel;
class QMenu;
class QPushButton;
QT_END_NAMESPACE

/**
 * Main application widget, responsible for connecting the various UI
 * elements to the Engine.
 */
class MainWidget : public QWidget
{
    Q_OBJECT

public:
    explicit MainWidget(QWidget *parent = nullptr);
    ~MainWidget();

    // QObject
    void timerEvent(QTimerEvent *event) override;

public slots:
    void stateChanged(QAudioDevice::Mode mode, QAudio::State state);
    void formatChanged(const QAudioFormat &format);
    void spectrumChanged(qint64 position, qint64 length, const FrequencySpectrum &spectrum);
    void infoMessage(const QString &message, int timeoutMs);
    void errorMessage(const QString &heading, const QString &detail);
    void audioPositionChanged(qint64 position);
    void bufferLengthChanged(qint64 length);

private slots:
    void showFileDialog();
    void showSettingsDialog();
    void showToneGeneratorDialog();
    void initializeRecord();
    void updateModeMenu();
    void updateButtonStates();

private:
    void createUi();
    void createMenus();
    void connectUi();
    void reset();

    enum Mode { NoMode, RecordMode, GenerateToneMode, LoadFileMode };

    void setMode(Mode mode);

private:
    Mode m_mode;

    Engine *m_engine;

#ifndef DISABLE_WAVEFORM
    Waveform *m_waveform;
#endif
    ProgressBar *m_progressBar;
    Spectrograph *m_spectrograph;
    LevelMeter *m_levelMeter;

    QPushButton *m_modeButton;
    QPushButton *m_recordButton;
    QIcon m_recordIcon;
    QPushButton *m_pauseButton;
    QIcon m_pauseIcon;
    QPushButton *m_playButton;
    QIcon m_playIcon;
    QPushButton *m_settingsButton;
    QIcon m_settingsIcon;

    QLabel *m_infoMessage;
    int m_infoMessageTimerId;

    SettingsDialog *m_settingsDialog;
    ToneGeneratorDialog *m_toneGeneratorDialog;

    QMenu *m_modeMenu;
    QAction *m_loadFileAction;
    QAction *m_generateToneAction;
    QAction *m_recordAction;
    bool m_errorOccurred;
};

#endif // MAINWIDGET_H