import machine
import utime
import urandom


# internal LED definition
led_onboard = machine.Pin(25, machine.Pin.OUT)

# external RED, YELLOW, GREEN LED
led = machine.Pin(2, machine.Pin.OUT)

# input definitions
left_button = machine.Pin(5, machine.Pin.IN, machine.Pin.PULL_DOWN)
right_button = machine.Pin(6, machine.Pin.IN, machine.Pin.PULL_DOWN)

# main loop
led_onboard.value(1)
led.value(0)


pressed = False
fastest_button = None

def button_handler(pin): 
    global pressed, fastest_button
    if not pressed: 
        pressed = True
        fastest_button = pin
        timer_reaction = utime.ticks_diff(utime.ticks_ms(), timer_start)
        print("Your reaction time was " + str(timer_reaction) + " milliseconds!")

# initialization
led.value(1)
utime.sleep(urandom.uniform(5, 10))
led.value(0)

timer_start = utime.ticks_ms()
left_button.irq(trigger=machine.Pin.IRQ_RISING, handler = button_handler) 
right_button.irq(trigger=machine.Pin.IRQ_RISING, handler = button_handler)

# main loop
while fastest_button is None:
    utime.sleep(1)
if fastest_button is left_button: 
    print("Left Player wins!")
elif fastest_button is right_button: 
    print("Right Player wins!")