#!/usr/bin/env python

# Ensure that the default device gets set to bluetooth when a bluetooth
# device is plugged in
# 
# This allows the system volume meter to set the volume
#
# Also make it not full volume too (currently 50%)
#
# Timothy Allen <tim@treehouse.org.za>

import dbus
import gobject
import atexit
import re 

from subprocess import Popen, PIPE
from dbus.mainloop.glib import DBusGMainLoop

def get_sinks():
	sinks = Popen(["pacmd", "list-sinks"], shell=False, stdout=PIPE).communicate()[0]
	m = re.findall(r"name: <(.*?)>", sinks)
	return m

def get_default_sink():
	sinks = Popen(["pacmd", "info"], shell=False, stdout=PIPE).communicate()[0]
	m = re.findall(r"Default sink name: (.*?)\s", sinks)
	return m

def set_default_sink(sink):
	print "Setting sink: %s" % sink
	Popen(["pacmd", "set-default-sink", sink], shell=False, stdout=PIPE).communicate()[0]

# Volume is a percent
def set_volume(sink, volume):
	print "Setting volume for sink %s to: %d" % (sink, volume)
	volume = str(int(65536*(float(str(volume).strip("%"))/100)))
	Popen(["pacmd", "set-sink-volume", sink, volume], shell=False, stdout=PIPE).communicate()[0]


def device_change(name, value, iface=None, path=None):
	#print "Name: %s \nValue: %s\nInterface: %s \nPath: %s" % (name, value, iface, path)
	if (value == "connected"):
		# set path as default pulse device
		for sink in get_sinks():
			if re.match("bluez", sink):
				set_default_sink(sink)
		# change volume
		set_volume(sink, volume)
#	elif (value == "disconnected"):
#		# change default device is there's one sink left
#		sinks = get_sinks()
#		if isinstance(sinks, basestring):
#			set_default_sink(sink)
#		else:
#			set_default_sink(initial_sink)

# Volume is a value out of 100
volume=50

loop = gobject.MainLoop()
dbus_loop = DBusGMainLoop()
bus = dbus.SystemBus(mainloop=dbus_loop)

#bluez = bus.get_object("org.bluez", "/");
#manager = dbus.Interface(bluez, "org.bluez.Manager")
#adapter = dbus.Interface(manager.DefaultAdapter(), "org.bluez.Adapter")
#proxy = bus.get_object("org.bluez", manager.DefaultAdapter())

bus.add_signal_receiver(device_change, 
	signal_name=None,
	dbus_interface="org.bluez.Audio",
	interface_keyword="iface",
	path_keyword="path")

initial_sink = get_default_sink();
atexit.register(loop.quit)

loop.run()

# vi: filetype=python:expandtab:shiftwidth=4:softtabstop=4:tw=0