/* SPDX-License-Identifier: MIT
 * Copyright (c) 2021 KikooDX
 * This file is part of
 * [Painfull Success CG](https://git.sr.ht/~kikoodx/painfull-success-cg),
 * which is MIT licensed. The MIT license requires this copyright notice to be
 * included in all copies and substantial portions of the software. */
#include "input.h"
#include "lazyint.h"
#include <gint/keyboard.h>

void
input_update(Input *input)
{
	/* Read full input stream. */
	clearevents();
	/* For each key, update state. */
	for (u8 i = 0; i < KEYS_COUNT; ++i) {
		u8 *state = &input->states[i];
		const u8 key = input->keys[i];
		/* See if the key is pressed. */
		const bool pressed = keydown(key);
		/* Update input status. */
		if (pressed) {
			if (*state == S_RELEASED || *state == S_UP)
				*state = S_PRESSED;
			else
				*state = S_DOWN;
		} else {
			if (*state == S_PRESSED || *state == S_DOWN)
				*state = S_RELEASED;
			else
				*state = S_UP;
		}
	}
}

void
input_init(Input *input)
{
	/* initialize all values to S_UP, avoid random bugs */
	input->keys[K_LEFT] = KEY_LEFT;
	input->keys[K_RIGHT] = KEY_RIGHT;
	input->keys[K_DOWN] = KEY_DOWN;
	input->keys[K_JUMP] = KEY_SHIFT;
	input->keys[K_RESTART] = KEY_6;
	input->keys[K_CAM_UP] = KEY_TAN;
	input->keys[K_CAM_DOWN] = KEY_ARROW;
	input->keys[K_EXIT] = KEY_EXIT;
	for (u8 i = 0; i < KEYS_COUNT; ++i)
		input->states[i] = S_UP;
}

bool
input_is_pressed(Input input, u8 key)
{
	return input.states[key] == S_PRESSED;
}

bool
input_is_down(Input input, u8 key)
{
	return ((input.states[key] == S_DOWN) ||
	        (input.states[key] == S_PRESSED));
}

bool
input_is_released(Input input, u8 key)
{
	return input.states[key] == S_RELEASED;
}

bool
input_is_up(Input input, u8 key)
{
	return ((input.states[key] == S_UP) ||
	        (input.states[key] == S_RELEASED));
}