#!/usr/bin/python
import argparse
import dbus
import datetime

# Level settings:
day_level = 95
night_level = 80

bus = dbus.SessionBus()

proxy = bus.get_object('org.gnome.SettingsDaemon',
                       '/org/gnome/SettingsDaemon/Power')
#print proxy

iface = dbus.\
  Interface(proxy, dbus_interface='org.gnome.SettingsDaemon.Power.Screen')

# Description
parser = argparse.ArgumentParser(description='Sets the Monitor Brightness')

# Set int argument:
parser.add_argument("level", nargs="?", type=int, help='Integer from 1 to 100')
# nargs="?" wont make error if missing argument

args = parser.parse_args()

#print 'Bright: ', args.level

if not args.level and args.level != 0:

    # Setting brightness based on time:
    print "Setting brightness based on Time"

    now = datetime.datetime.now()
    #print "Current hour: %d" % now.hour

    if now.hour > 7 and now.hour < 20:
        level = day_level
        #print "Brigthness Changed"
    else:
        level = night_level

else:
        level = args.level

print "Setting brightness to: ", level

# Set brightness:
try:
    iface.SetPercentage(level)
except:
    print "Wrong brightness input: \nplease enter int from 1 to 100"