from machine import Pin, ADC, Timer
from time import sleep, ticks_ms, ticks_diff

# -----

S1, S2, S3 = Pin(0, Pin.IN), Pin(1, Pin.IN), Pin(2, Pin.IN)
LED1, LED2, S = Pin(4, Pin.OUT), Pin(5, Pin.OUT), Pin(11, Pin.OUT)

AD1 = ADC(Pin(26))

debounce = ticks_ms()
ticker = Timer()

ON, OFF = 65535, 0
CONF = True
error = False

# -----

def check():
  global OFF, ON, LED2, LED2, error

  if OFF > ON:
    LED1.on()
    LED2.on()
    print("ERROR")
    error = True
  else:
    LED1.off()
    LED2.on()
    error = False

def click_S1(p):
  global CONF, debounce, ON, AD1

  if not CONF or ticks_diff(ticks_ms(), debounce) < 200:
    return
  else:
    debounce = ticks_ms()

  ON = AD1.read_u16()
  print("ON=" + str(ON))
  check()

def click_S2(p):
  global CONF, debounce, error, OFF, AD1

  if not CONF or ticks_diff(ticks_ms(), debounce) < 200:
    return
  else:
    debounce = ticks_ms()

  OFF = AD1.read_u16()
  print("OFF=" + str(OFF))
  check()

def click_S3(p):
  global debounce, CONF, S, LED1, LED2

  if error or ticks_diff(ticks_ms(), debounce) < 200:
    return
  else:
    debounce = ticks_ms()

  CONF = not CONF

  if CONF:
    print("CONF")
    S.off()
    LED1.off()
    LED2.on()
  else:
    print("WORK")
    LED1.on()
    LED2.off()

def evaluate(p):
  global CONF, AD1, OFF, ON, S

  if (not CONF):
    value = AD1.read_u16()

    if value < OFF:
      S.off()
    elif value > ON:
      S.on()

LED1.off()
LED2.on()
S.off()

S1.irq(handler=click_S1, trigger=Pin.IRQ_RISING)
S2.irq(handler=click_S2, trigger=Pin.IRQ_RISING)
S3.irq(handler=click_S3, trigger=Pin.IRQ_RISING)

ticker.init(period=20, mode=Timer.PERIODIC, callback=evaluate)

while True:
  sleep(0.02)