from machine import Pin
from time import sleep

yellow=Pin(23,Pin.OUT)
red=Pin(22,Pin.OUT)
green=Pin(21,Pin.OUT)
blue=Pin(17,Pin.OUT)

yellowBtn=Pin(26,Pin.IN, Pin.PULL_DOWN)
blueBtn=Pin(12,Pin.IN, Pin.PULL_DOWN)

maxi= 15
mini= 0
occupied_spaces = 0

yellow_last_state= 0
blue_last_state = 0

green.on()

while True:
    yellow_current_state= yellowBtn.value()
    blue_current_state= blueBtn.value()
    if yellow_current_state == 1 and yellow_last_state == 0:
        sleep(0.2)
        if occupied_spaces < maxi :
            print("There is a space")
            yellow.on()
            sleep(0.5)
            yellow.off()
            print("A car has just entered")
            occupied_spaces += 1 
            if occupied_spaces == maxi:
                print(f"There is no spaces left")
                print("Garage is occupied")
                green.off()
                red.on()
            else:
                print(f"There is {maxi - occupied_spaces} spaces left")
    yellow_last_state=yellow_current_state
      
    if blue_current_state == 1 and blue_last_state == 0:
        sleep(0.2)
        if occupied_spaces > mini:
            print("A car has just left")
            red.off()
            green.on()
            sleep(0.2)
            blue.on()
            sleep(0.5)
            blue.off()
            occupied_spaces += -1
            if occupied_spaces == mini:
                print("Garage is empty")
            else:
                print(f"There is {maxi - occupied_spaces} space left")
    blue_last_state =blue_current_state
    sleep(0.3)