from machine import Pin ,
import utime
# constants
BUTTON_COUNT = 3
LED_COUNT = 9
INPUT_COUNT = 4

# MUX Pins
s0 = machine.Pin(27, machine.Pin.OUT)
s1 = machine.Pin(28, machine.Pin.OUT)
muxIn = machine.Pin(26, machine.Pin.IN)

# Initialize global variables
last_button_time_stamp = 0
button_pressed = False
key_presses = []
BUTTON_START_ID = 16  # Assuming the first button starts at pin 16
LED_GPIO_START = 7

# Define the pins for the buttons
b1 = Pin(16, Pin.IN, Pin.PULL_DOWN)
b2 = Pin(17, Pin.IN, Pin.PULL_DOWN)
b3 = Pin(18, Pin.IN, Pin.PULL_DOWN)

# Define the pins for the leds
led0=pin(15.Pin.OUT)
led1=pin(14.Pin.OUT)
led3=pin(13.Pin.OUT)
led4=pin(12.Pin.OUT)
led5=pin(11.Pin.OUT)
led6=pin(10.Pin.OUT)
led7=pin(9.Pin.OUT)
led8=pin(8.Pin.OUT)
led9=pin(7.Pin.OUT)


# Define the passcode
PASSCODE = [0, 2, 1]
entered = []

# Function to get the numeric ID of the pin
def PinId(pin):
    # Correctly slice the string to get the pin number
    return int(str(pin)[8:11].rstrip(","))

# Interrupt callback function for button press events
def interrupt_callback(pin):

    global last_button_time_stamp
    global button_pressed
    global key_presses

    # Debouncing
    cur_button_ts = utime.ticks_ms()  # Get the current time in milliseconds
    button_press_delta = cur_button_ts - last_button_time_stamp  # Calculate the time difference since the last button press
    if button_press_delta > 200:
        last_button_time_stamp = cur_button_ts  # Update the last button time stamp
        key_presses.append(pin) # Add the pin to the list of key presses
        print(f'key press: {PinId(pin) - BUTTON_START_ID}')  # Print the button ID

def button_callback(pin):
    led.toggel()
def clearEntered(pin):
    global entered
    if entered:
        print("Clearing entered sequence due to inactivity...")
        timeoutLed.value(1)
        utime.sleep(0.75)
        timeoutLed.value(0)
        entered = []
        utime.sleep(0.2)

def main(): 
    global last_button_time_stamp
    global button_pressed

button_in = machine.Pin(BUTTON_PIN, machine.Pin.IN, machine.Pin.PULL_DOWN)
button_in.irq(trigger=machine.Pin.IRQ_FALLING, handler=interrupt_callback)