#ifndef DEVICEIDENTIFIER_H
#define DEVICEIDENTIFIER_H

// std includes
#include <array>
#include <mutex>
#include <memory>

namespace openspace {

#define MAXDEVICES 16

enum class InputDevice {NONE, UNKNOWN, SPACENAVIGATOR, XBOX}; 

class DeviceIdentifier {
public:
	static DeviceIdentifier& ref();
	virtual ~DeviceIdentifier();

	static void init();
	static void deinit();
	static bool isInitialized();
	
	void scanDevices();
	const int numberOfDevices() const;
	const InputDevice type(const int device) const;
	
	void update();
	void update(const int device);

	const int getButtons(const int device, unsigned char **buttons = nullptr) const;
	const int getAxes(const int device, float **axespos = nullptr) const;
	void get(const int device, unsigned char **buttons, float **axespos) const;
	
private:
	// singleton
	static DeviceIdentifier* this_;
    DeviceIdentifier(void);
    DeviceIdentifier(const DeviceIdentifier& src);
    DeviceIdentifier& operator=(const DeviceIdentifier& rhs);


	// member variables
	int devices_;
	std::array<InputDevice, MAXDEVICES> inputDevice_;
	std::array<int, MAXDEVICES> numberOfAxes_;
	std::array<int, MAXDEVICES> numberOfButtons_;
	std::array<float *, MAXDEVICES> axesPos_;
	std::array<unsigned char *, MAXDEVICES> buttons_;

};

} // namespace openspace

#endif