#!/usr/bin/python

# Ainda continua sendo o codigo do cara, apenas retirei as partes que nao nos interessa.
# Ainda tem que ver se pode usar o codigo, ou seja, olhar a licensa. 
# Deve ser istalado no dispositivo
# Otacilio Lacerda

import dbus
import dbus.service
import dbus.glib
import gobject

percent_left = -1
charging = False

loop = gobject.MainLoop()

class Request(dbus.service.Object): 
    def __init__(self, bus_name):
        dbus.service.Object.__init__(self, bus_name, '/com/nokia/bme/request')

    @dbus.service.signal('com.nokia.bme.request')
    def timeleft_info_req(self):
        pass

    @dbus.service.signal('com.nokia.bme.request')
    def status_info_req(self):
        pass

def timeleft_handler(idle_time, active_time):
    global percent_left
    percent_left = min(100, 100.0 * idle_time / 15000)
    loop.quit()

def charging_on_handler():
    global charging
    charging = True
    loop.quit()

def charging_off_handler():
    global charging
    charging = False
    loop.quit()

def getBatteryState(request):
    global percent_left
    global charging

    request.status_info_req()
    loop.run()

    if charging:
        return -1
    request.timeleft_info_req()
    loop.run()
    return percent_left

if __name__ == "__main__":

    bus = dbus.SystemBus(private = True)
    bus.add_signal_receiver(timeleft_handler, 'battery_timeleft')
    bus.add_signal_receiver(charging_on_handler, 'charger_charging_on')
    bus.add_signal_receiver(charging_on_handler, 'battery_full')
    bus.add_signal_receiver(charging_off_handler, 'charger_charging_off')
    bus_name = dbus.service.BusName('com.nokia.bme.request', bus)
    request = Request(bus_name)

    percent = getBatteryState(request)
    if percent < 0:
        print '-1'
    else:
        print '%.1f' % (percent)