#include "TZR_events.h"
#include "TZR_resource.h"
#include "TZR_globals.h"
#include <SDL2/SDL_scancode.h>
#include <limits.h>

void
next_state(TZR_KeyState *keystate)
{
	switch (*keystate) {
	case TZR_KEYSTATE_RELEASE:
	case TZR_KEYSTATE_UP:
		*keystate = TZR_KEYSTATE_UP;
		break;
	case TZR_KEYSTATE_PRESS:
	case TZR_KEYSTATE_DOWN:
		*keystate = TZR_KEYSTATE_DOWN;
		break;
	default:
		break;
	}
}

static void
get_axis(SDL_GameController *gc, float *out, SDL_GameControllerAxis axis)
{
	const Sint16 v = SDL_GameControllerGetAxis(gc, axis);
	if (v > -16384 && v < 16384)
		*out = 0.0f;
	else
		*out = (float)v / INT16_MAX;
}

void
TZR_CycleEvents(void)
{
	TZR_ResourcesWatch();
	for (int i = 0; i < SDL_NUM_SCANCODES; i++)
		next_state(&___tzr_keystates[i]);
	for (int i = 0; i < 256; i++)
		next_state(&___tzr_mousestates[i]);
	for (int i = 0; i < SDL_CONTROLLER_BUTTON_MAX; i++)
		next_state(&___tzr_joystates[i]);
	TZR_Event e;
	while (TZR_PollEvent(&e))
		;

	for (size_t i = 0; i < ___tzr_joysticks_size; i++) {
		TZR_Joystick *const jstick = &___tzr_joysticks[i];
		if (jstick->ptr == NULL)
			continue;
		for (int k = 0; k < SDL_CONTROLLER_BUTTON_MAX; k++) {
			if (SDL_GameControllerGetButton(jstick->ptr, k)) {
				if (___tzr_joystates[k] != TZR_KEYSTATE_DOWN)
					___tzr_joystates[k] = TZR_KEYSTATE_PRESS;
			} else {
				if (___tzr_joystates[k] != TZR_KEYSTATE_UP)
					___tzr_joystates[k] = TZR_KEYSTATE_RELEASE;
			}
		}
		get_axis(jstick->ptr, &jstick->leftx, SDL_CONTROLLER_AXIS_LEFTX);
		get_axis(jstick->ptr, &jstick->lefty, SDL_CONTROLLER_AXIS_LEFTY);
		get_axis(jstick->ptr, &jstick->rightx, SDL_CONTROLLER_AXIS_RIGHTX);
		get_axis(jstick->ptr, &jstick->righty, SDL_CONTROLLER_AXIS_RIGHTY);
	}
}