#!/usr/bin/python
# -*- coding: UTF-8 -*-
# vim: expandtab sw=4 ts=4 sts=4 tw=78:
'''
Simple DBUS listener which catches button events and executes one of hard
coded actions.
'''
__author__ = 'Michal Čihař'
__email__ = 'michal@cihar.com'
__license__ = '''
Copyright © 2007 - 2008 Michal Čihař

This program is free software; you can redistribute it and/or modify it
under the terms of the GNU General Public License version 2 as published by
the Free Software Foundation.

This program is distributed in the hope that it will be useful, but WITHOUT
ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
more details.

You should have received a copy of the GNU General Public License along with
this program; if not, write to the Free Software Foundation, Inc.,
51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
'''

import dbus
import dbus.glib
import gobject
import os
import mpdclient2

def stop():
    mpd = mpdclient2.connect()
    mpd.stop()

def next():
    mpd = mpdclient2.connect()
    mpd.next()

def previous():
    mpd = mpdclient2.connect()
    mpd.previous()

def toggle():
    mpd = mpdclient2.connect()
    s = mpd.status()
    if s['state'] == 'play':
        mpd.pause(True)
    else:
        mpd.play()

KEYMAP = {
    'stop' : (stop, ()),
    'playpause' :  (toggle, ()),
    'nextsong' : (next, ()),
    'previoussong' : (previous, ()),
    'fn+1' : (os.system, ('sudo /usr/bin/chvt 1', )),
    'fn+2' : (os.system, ('sudo /usr/bin/chvt 2', )),
    'fn+3' : (os.system, ('sudo /usr/bin/chvt 3', )),
    'fn+4' : (os.system, ('sudo /usr/bin/chvt 4', )),
    'fn+5' : (os.system, ('sudo /usr/bin/chvt 5', )),
    'fn+6' : (os.system, ('sudo /usr/bin/chvt 6', )),
    'fn+7' : (os.system, ('sudo /usr/bin/chvt 7', )),
    'fn+8' : (os.system, ('sudo /usr/bin/chvt 8', )),
    'fn+tab' : (os.system, ('sudo ~/bin/toggle-fan', )),
    'fn+space' : (os.system, ('sudo ~/bin/toggle-touchpad', )),
}

def condition_events_handler(type, key):
    '''
    Handles Condition events from org.freedesktop.Hal.Device.
    '''
    if type == 'ButtonPressed':
        key = key.lower()
        try:
            KEYMAP[key][0](*KEYMAP[key][1])
            print 'Executed event for key: %s' % key
        except KeyError:
            print 'No event defined for key: %s' % key


# Get system bus
bus = dbus.SystemBus()

# Attach to callback
bus.add_signal_receiver(condition_events_handler,
        'Condition', 'org.freedesktop.Hal.Device', None, None)

# Main loop
print 'Listening for events'
loop = gobject.MainLoop()
loop.run()