#!/usr/bin/python
# $Id: telephommande,v 1.4 2007/08/16 16:54:41 matthias Exp $
# Author: Matthias Meulien

# Check http://mapage.noos.fr/orontee/index.html

"""Usage: telephommande [OPTIONS]
Control your computer from a SAGEM myX6-2 phone via Bluetooth.

Use one of the following to specify a phone device: 

    -a, --address=ADDRESS   Connect to the phone at ADDRESS
    -n, --name=NAME         Connect to the phone named NAME

Various
    -d, --debug             Print output of subprocesses
    -h, --help              This help message
    -i, --info              Print phone keys usage and exit"""

import bluetooth
import socket
import re
import subprocess
import getopt
import sys

commands = {'left dot':   'totem --play-pause', \
            'right dot':  'totem --fullscreen', \
            'up':         'amixer set Master 4dB+', \
            'down':       'amixer set Master 4dB-', \
            'right':      'totem --seek-fwd', \
            'left':       'totem --seek-bwd', \
            'diaresis':   'amixer set Master toggle', \
            'hang-up':    'totem --quit'}

key_names = {'91': 'left dot', '32': 'right dot', '94': 'up', '86': 'down', \
             '77': 'right', '67':'left', '35': 'diaresis', '69':'hang-up'}

def usage():
  print __doc__

def lookup(name):
  # Get addreess of Bluetooth device by name
  try: 
    devices = bluetooth.discover_devices()
    for bdaddr in devices:
      if name == bluetooth.lookup_name( bdaddr ):
        address = bdaddr
        print('Device '+name+' found at address '+address)
        return address
  except bluetooth.BluetoothError:
    print("Devices discovery failed")
  except KeyboardInterrupt:
    sys.exit()
  print('Device '+name+' not found')
  return None

def connect(address, port):
  # Start connection to Bluetooth device
  global status
  try:
    socket.connect((address, port))
    name = bluetooth.lookup_name(address)
    print("Connected to "+name)
    print("Press Ctrl-C to close connection")
    status = "connected"
    socket.send("AT+CMER=2,1,0,0,0\r")
    # Start key event reporting
  except bluetooth.BluetoothError:
    print("Connection to device "+address+" failed")
  except KeyboardInterrupt:
    sys.exit()

def deconnect():
  # Close connection to Bluetooth device
  socket.send("AT+CMER=2,0,0,0,0\r")
  # Stop key event reporting
  socket.close()

def listen():
  # Read data from socket and search for command to execute
  r = re.compile('\+CKEV. ([0-9]+),1')
  while status == "connected":
    try:
      data = socket.recv(256)
      match = r.search(data)
      if match:
        key_code = match.group(1)
        try:
          name = key_names[key_code]
          execute(commands[name])
        except KeyError:
          print("Undefined key code :"+key_code)
    except KeyboardInterrupt:
      break

def execute(string):
  try:
    p = subprocess.Popen([string], shell=True, stdout = subprocess.PIPE)
  except OSError:
    print("Command failed :"+string)
  if debug:
    output = p.stdout.read()
    print(output)

def print_command_dictionary(dictionary):
  "Print a dictionary on two columns"
  padding = 2
  width_1 = max(len(max(dictionary.keys(), key = len))+padding, 4)
  width_2 = max(len(max(dictionary.values(), key = len)), 8)
  # Compute width of columns
  print("Key".ljust(width_1)+"Command")
  print("-"*(width_1+width_2))
  # Print header
  keys = dictionary.keys()
  keys.sort()
  for key in keys:
    print(key.ljust(width_1)+dictionary[key])
  print ""
  
if __name__ == "__main__":
  address, debug = False, False
  opts, args = getopt.gnu_getopt(sys.argv[1:], 'a:dhin:', \
                             ['address=', 'debug', 'help', 'info', 'name='])
  opts.sort()
  for opt, a in opts:
    if opt in ('-a', '--address='):
      address = a
    elif opt in ('-d', '--debug'):
      debug = True
    elif opt in ('-n', '--name='):
      address = lookup(a)
    elif opt in ('-h', '--help'):
      usage()
      sys.exit()
    elif opt in ('-i', '--info'):
      print_command_dictionary(commands)
  if address:
    port = 20
    socket = bluetooth.BluetoothSocket(bluetooth.RFCOMM)
    status = "disconnected"
    connect(address, port)
    listen()
    deconnect()
  else:
    print('No address found for phone device')
    print('Try telephommande --help')