#ifndef TICKS_H
#define TICKS_H

#include <cstdint>

#ifdef BUILD_SDL
#else
#include <dpmi.h>
#endif

class Timer {
public:
	using Callback = void (*)();

	Timer();

	~Timer();

	void setFrequency(uint16_t freq);

	void setDivider(uint16_t div);

	Callback setCallback(Callback);

	[[nodiscard]] uint32_t getTicks() const;

	[[nodiscard]] uint16_t getFrequency() const;

	static Timer &instance();

private:
	friend void timerISR();

#ifdef BUILD_SDL
#else
	_go32_dpmi_seginfo _oldIsr{}, _newIsr{};
#endif

	uint32_t _ticks{0};
	uint32_t _elapsed{0};
	uint16_t _div{0};
	uint16_t _freq{0};

	void (*_callback)(){nullptr};

	void update();
};

#endif