#!/usr/bin/python3

from gi.repository import GLib
import sys
import dbus
import dbus.mainloop.glib


def cm_property_changed(name, value):
	print("CallMeter property: '%s' changed to '%s'" % (name, str(value)))
	if canexit:
		mainloop.quit()

def cm_maximum_reached():
	print("Only 30 seconds call time remains, recharge.")

def print_useage(s):
	print("Usage: %s <property> <newvalue> <password>" % (s))
	print("Usage: %s reset <password>" % (s))
	sys.exit(1);

if __name__ == "__main__":
	if len(sys.argv) != 3 and len(sys.argv) != 4:
		print_useage(sys.argv[0])

	if (sys.argv[1] == 'reset'):
		pin = sys.argv[2]
	else:
		if (len(sys.argv) != 4):
			print_useage(sys.argv[0])
		property = sys.argv[1]
		newvalue = sys.argv[2]
		pin = sys.argv[3]

	canexit = False

	dbus.mainloop.glib.DBusGMainLoop(set_as_default=True)

	bus = dbus.SystemBus()

	manager = dbus.Interface(bus.get_object('org.ofono', '/'),
			'org.ofono.Manager')

	modems = manager.GetModems()

	cm = dbus.Interface(bus.get_object('org.ofono', modems[0][0]),
			'org.ofono.CallMeter')

	cm.connect_to_signal("PropertyChanged", cm_property_changed)
	cm.connect_to_signal("NearMaximumWarning", cm_maximum_reached)

	properties = cm.GetProperties()

	print("Currency: %s" % (properties['Currency']))
	print("PricePerUnit %s" % (properties['PricePerUnit']))
	print("Call meter for the current call: %s" % (properties['CallMeter']))
	print("Call meter for current and previous calls: %s" %\
		properties['AccumulatedCallMeter'])
	print("Call meter maximum, once reached calls are not possible: %s" %\
		properties['AccumulatedCallMeterMaximum'])

	total = properties['PricePerUnit'] * properties['AccumulatedCallMeter']
	print("Accumulated Meter in Currency: %s %s" %\
		(total, properties['Currency']))

	if (sys.argv[1] == 'reset'):
		print("Resetting Accumulated Call Meter")
		try:
			cm.Reset(pin)
		except dbus.DBusException as e:
			print("Unable to reset ACM: %s" % e)
			sys.exit(1)
	else:
		try:
			if property == 'AccumulatedCallMeterMaximum':
				newvalue = dbus.UInt32(newvalue)
			elif property == 'PricePerUnit':
				newvalue = float(newvalue)
			cm.SetProperty(property, newvalue, pin)
		except dbus.DBusException as e:
			print("Unable to set property: %s" % e)
			sys.exit(1)

	canexit = True

	mainloop = GLib.MainLoop()
	mainloop.run()