#include <SDL.h>

#include "../Timer.h"

SDL_TimerID timerId;

void timerISR() {
	Timer::instance().update();
}

Timer::Timer() {
	_freq = 50;
	timerId = SDL_AddTimer(1000/_freq, [] (Uint32, void*) -> Uint32 {
		timerISR();
		return 1000 / instance().getFrequency();
	}, nullptr);
}

Timer::~Timer() {
	SDL_RemoveTimer(timerId);
}

void Timer::update() {
	// TODO
	_ticks++;
	if (_callback) _callback();
}

uint32_t Timer::getTicks() const {
	return _ticks;
}

void Timer::setFrequency(uint16_t freq) {
	_freq = freq;
	// TODO
}

uint16_t Timer::getFrequency() const {
	return _freq;
}

void Timer::setDivider(uint16_t div) {
	// TODO
}

Timer::Callback Timer::setCallback(Timer::Callback callback) {
	auto oldCallback = _callback;
	_callback = callback;
	return oldCallback;
}

Timer &Timer::instance() {
	static Timer inst;
	return inst;
}