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

void input_update(Input *input) {
	/* Read full input stream. */
	clearevents();
	/* For each key, update state. */
	for (int i = 0; i < KEYS_COUNT; ++i) {
		uint8_t *state = &input->states[i];
		const uint8_t 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_EXIT] = KEY_EXIT;
	for (int i = 0; i < KEYS_COUNT; ++i)
		input->states[i] = S_UP;
}

bool input_is_pressed(Input *input, uint8_t key) {
	return input->states[key] == S_PRESSED;
}

bool input_is_down(Input *input, uint8_t key) {
	return (input->states[key] == S_DOWN) || (input->states[key] == S_PRESSED);
}

bool input_is_released(Input *input, uint8_t key) {
	return input->states[key] == S_RELEASED;
}

bool input_is_up(Input *input, uint8_t key) {
	return (input->states[key] == S_UP) || (input->states[key] == S_RELEASED);
}