#ifndef QMACROKEYSMANAGER_H
#define QMACROKEYSMANAGER_H

#include <QObject>
#include <QMap>
#include <QThread>
#include <QTimer>

#include "hidapi.h"

#define MACROKEYS_VID	0x2341
#define MACROKEYS_PID	0x8036

#define NUM_HID_BYTES		5
#define NUM_BUTTON_ROWS		8
#define NUM_BUTTON_COLUMNS	4

#define	ENC1_CCW	0b10000000
#define	ENC1_CW		0b01000000
#define	ENC2_CCW	0b00100000
#define	ENC2_CW		0b00010000
#define	ENC3_CCW	0b00001000
#define	ENC3_CW		0b00000100
#define	ENC4_CCW	0b00000010
#define ENC4_CW		0b00000001


enum class EncoderRotation : qint8 {
	CCW = -1,
	INVALID,
	CW
};
Q_DECLARE_METATYPE(EncoderRotation)


struct HIDDevice
{
	hid_device *hidDevice = nullptr;
	QString sManufacturer;
	QString sProduct;
	QString sSerialNumber;
	QString sPath;

	const hid_device_info *hidInfo;
};

typedef QVector<bool> ButtonStateRow;
typedef QVector<ButtonStateRow> ButtonStateVector;

class QMacroKeysManager : public QObject
{
	Q_OBJECT
public:
	explicit QMacroKeysManager(QObject *parent = nullptr);

	void initDevices();
	void uninitDevices();

signals:
	void newDeviceFound(const QString &devicePath);
	void newButtonState(const quint8 &row, const quint8 &column, const bool &state);
	void newEncoderRotation(const quint8 &column, const EncoderRotation &direction);

private slots:
	void getDeviceInitStatus(const HIDDevice &device);
	void handleNewButtonState(const quint8 &row, const quint8 &column, const bool &state);
	void handleNewEncoderRotation(const quint8 &column, const EncoderRotation &direction);

private:
	QMap<QString, class QDeviceHandler*> mDevices;
};

class QDeviceHandler : public QObject
{
	Q_OBJECT
public:
	explicit QDeviceHandler(QObject *parent = nullptr);
	~QDeviceHandler();

	void initDevice(const hid_device_info *di);
	void runDevice();

public slots:
	void buttonReadLoop();

signals:
	void deviceInitialised(const HIDDevice &device);
	void buttonStateChanged(const quint8 &row, const quint8 &column, const bool &state);
	void encoderRotationChanged(const quint8 &column, const EncoderRotation &direction = EncoderRotation::INVALID);

private:
	QThread threadButtonReader;
	HIDDevice hidDevice;
	ButtonStateVector vCurrentButtonStates;
};

#endif // QMACROKEYSMANAGER_H