import RPi.GPIO as GPIO
import os, subprocess, time
os.environ['DISPLAY'] = ":0"

CHROMIUM_REFRESH_PERIOD = 600
MINIMUM_TIME_ON = 180
displayison = False
last_refresh = time.time()
last_detected = time.time()
GPIO.setwarnings(False)
print('Pi Model is %s' % GPIO.RPI_INFO['P1_REVISION'])
GPIO.setmode(GPIO.BCM)
GPIO.setup(17, GPIO.IN)
while True:
  if GPIO.input(17):
    if time.time() > (last_refresh + CHROMIUM_REFRESH_PERIOD):
      subprocess.call(['/home/pi/autorefresh-chromium.sh'])
      last_refresh = time.time()
      time.sleep(2)
      print('Refreshing...')
    elif not displayison:
      subprocess.call('vcgencmd display_power 1', shell=True)
      displayison = True
      last_detected = time.time()
      print('display turned on')
    else:
      last_detected = time.time()
  elif displayison:
    if time.time() > (last_detected + MINIMUM_TIME_ON):
      subprocess.call('vcgencmd display_power 0', shell=True)
      displayison = False
      print('display turned off')
    time.sleep(1)