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#ifndef GUITARTUNERUI_H
#define GUITARTUNERUI_H

#include <QWidget>
#include <QDebug>

namespace Ui {
    class GuitarTunerUI;
}

const qreal FrequencyE = 82.407;
const qreal FrequencyA = 110.00;
const qreal FrequencyD = 146.83;
const qreal FrequencyG = 196.00;
const qreal FrequencyB = 246.94;
const qreal FrequencyE2 = 329.63;

class GuitarTunerUI : public QWidget
{
    Q_OBJECT

public:
    explicit GuitarTunerUI(QWidget *parent = 0);
    ~GuitarTunerUI();

    qreal getVolume() const;
    bool getMuteState() const;
    qreal getMicrophoneSensitivity() const;
    bool isInputModeActive() const;
    qreal getFrequency() const;
    int getScaleMaximumValue() const;
    void setMaximumVoiceDifference(int max);
    void setMaximumPrecisionPerNote(int max);

public slots:
    void toggleSound(bool off);
    void next();
    void prev();
    void changeVolume();
    void toggleInputOrOutput();

    void lowVoice();
    void voiceDifference(qreal difference);
    void correctFrequencyObtained();

signals:
    void modeChanged(bool isInput);
    void volumeChanged(qreal volume);
    void microphoneSensitivityChanged(qreal sensitivity);
    void muteChanged(bool isMuted);
    void targetFrequencyChanged(qreal targetFrequency);

protected:
    void changeEvent(QEvent *e);

private:
    Ui::GuitarTunerUI *ui;
    void changeTone(int newIndex);
    qreal getVolumeFromSoundSlider() const;
    int m_currentToneIndex;
    QString m_currentToneString;
    qreal m_currentToneFrequency;
    void updateFrequencyByToneIndex(int index);
    bool m_outputActive;
    bool m_muted;
    qreal m_outputVolumeLevel;
    qreal m_inputVolumeLevel;
    int m_maximumPrecision;
};

#endif // GUITARTUNERUI_H