#Altera estado sem usar sleep
#reincia ao estado zero quanto pressiona o botão
# Botão com debounce
from machine import Pin
from utime import ticks_ms

bt1 = Pin(4,Pin.IN, Pin.PULL_UP)

states = ("state 0", "state 1", "state 2", "state 3")
index = 0
initial_time = 0

debounce_time = 500
last_press_time = ticks_ms()

def get_button(bt, last_press_time, debounce_time  ):
    current_time = ticks_ms()
    if bt.value() == 0 and current_time - last_press_time > debounce_time:
        return True, current_time
    else:
        return False, last_press_time

        
while True:

    if ticks_ms() - initial_time > 5000 or index == 0:
        print("Estado atual: {}".format(states[index]))
        index = index +1
        initial_time = ticks_ms()
        

    bt_state, last_press_time = get_button(bt1, last_press_time, debounce_time)
    
    if bt_state or index == 4:
        index = 0