#ifndef TOUCHPAD_HH

#define TOUCHPAD_HH

#include "EmuTime.hh"

#include "JoystickDevice.hh"

#include "MSXEventListener.hh"

#include "StateChangeListener.hh"

#include "StringSetting.hh"

#include "gl_mat.hh"

namespace openmsx {

class MSXEventDistributor;

class StateChangeDistributor;

class Display;

class CommandController;

class TclObject;

class Interpreter;

class Touchpad final : public JoystickDevice, private MSXEventListener

                     , private StateChangeListener

{

public:

	Touchpad(MSXEventDistributor& eventDistributor,

	         StateChangeDistributor& stateChangeDistributor,

	         Display& display,

	         CommandController& commandController);

	~Touchpad() override;

	template<typename Archive>

	void serialize(Archive& ar, unsigned version);

private:

	void createTouchpadStateChange(EmuTime time,

		uint8_t x, uint8_t y, bool touch, bool button);

	void parseTransformMatrix(Interpreter& interp, const TclObject& value);

	[[nodiscard]] gl::ivec2 transformCoords(gl::ivec2 xy);

	// Pluggable

	[[nodiscard]] zstring_view getName() const override;

	[[nodiscard]] zstring_view getDescription() const override;

	void plugHelper(Connector& connector, EmuTime time) override;

	void unplugHelper(EmuTime time) override;

	// JoystickDevice

	[[nodiscard]] uint8_t read(EmuTime time) override;

	void write(uint8_t value, EmuTime time) override;

	// MSXEventListener

	void signalMSXEvent(const Event& event,

	                    EmuTime time) noexcept override;

	// StateChangeListener

	void signalStateChange(const StateChange& event) override;

	void stopReplay(EmuTime time) noexcept override;

private:

	MSXEventDistributor& eventDistributor;

	StateChangeDistributor& stateChangeDistributor;

	Display& display;

	StringSetting transformSetting;

	gl::matMxN<2, 3, float> m; // transformation matrix

	EmuTime start = EmuTime::zero(); // last time when CS switched 0->1

	gl::ivec2 hostPos;    // host state

	uint8_t hostButtons = 0; //

	uint8_t x = 0, y = 0;               // msx state (different from host state

	bool touch = false, button = false; //            during replay)

	uint8_t shift = 0; // shift register to both transmit and receive data

	uint8_t channel = 0; // [0..3]   0->x, 3->y, 1,2->not used

	uint8_t last = 0; // last written data, to detect transitions

};

} // namespace openmsx

#endif