#include "input.h"
#include <gint/keyboard.h>

static struct Input input;

void
input_init(void)
{
	int i = K_COUNT;
	while (i-- > 0) {
		input.states[i] = KS_UP;
	}
	input.keys[K_JUMP] = KEY_SHIFT;
	input.keys[K_PUNCH] = KEY_ALPHA;
	input.keys[K_LEFT] = KEY_LEFT;
	input.keys[K_RIGHT] = KEY_RIGHT;
	input.keys[K_UP] = KEY_UP;
	input.keys[K_DOWN] = KEY_DOWN;
	input.keys[K_EXIT] = KEY_EXIT;
}

void
input_update(void)
{
	int i = K_COUNT;
	clearevents();
	while (i-- > 0) {
		const int kdown = keydown(input.keys[i]);
		enum KeyState *const state = &input.states[i];
		const enum KeyState prev_state = input.states[i];
		switch (prev_state) {
		case KS_UP:
		case KS_RELEASE:
			*state = (kdown) ? (KS_PRESS) : (KS_UP);
			break;
		case KS_DOWN:
		case KS_PRESS:
			*state = (kdown) ? (KS_DOWN) : (KS_RELEASE);
			break;
		default:
			break;
		}
	}
}

int
input_down(enum Key k)
{
	return input.states[k] == KS_DOWN || input.states[k] == KS_PRESS;
}

int
input_pressed(enum Key k)
{
	return input.states[k] == KS_PRESS;
}

int
input_up(enum Key k)
{
	return !input_down(k);
}

int
input_released(enum Key k)
{
	return input.states[k] == KS_RELEASE;
}