/*
 * Copyright 2017-2024 Oleg Borodin <onborodin@gmail.com>
 */

#include <stdint.h>
#include <stdbool.h>

#include <avr/io.h>

#include <button.h>
#include <tool.h>

static bool button_is_pressed(button_t *button);

void button_init(button_t *button, uintptr_t ddraddr, uintptr_t portaddr, uintptr_t pinaddr, uint8_t outnum) {
    button->ddraddr = ddraddr;
    button->portaddr = portaddr;
    button->pinaddr = pinaddr;
    button->outnum = outnum;
}

void button_setup(button_t *button) {
    REG_SETDOWN_BIT(_MMIO_BYTE(button->ddraddr), button->outnum);
    REG_SETUP_BIT(_MMIO_BYTE(button->portaddr), button->outnum);
}

static bool button_is_pressed(button_t *button) {
    if (!REG_BIT_VALUE(_MMIO_BYTE(button->pinaddr), button->outnum)) {
        return true;
    }
    return false;
}

bool button_was_pressed(button_t *button) {
    bool was_pressed = button->was_pressed;
    if (was_pressed) {
        button->was_pressed = false;
        button->push_time = 0;
    }
    return was_pressed;
}

void button_reset(button_t *button) {
    button->was_pressed = false;
    button->push_time = 0;
}

#define BUTTON_PRESS_TIME 30

void button_handle(button_t *button) {
    if (button_is_pressed(button)) {
        button->push_time++;
    }
    if (button->push_time > BUTTON_PRESS_TIME) {
        button->was_pressed = true;
    }
}