#!/usr/bin/python
###################################################
#
#		iTunes Python Shell Script v0.1
#			inspired by the bash shell scripts on MacOSXHints
#			http://www.macosxhints.com/article.php?story=20011108211802830
#
#		README
#			- give read/execute permissions to the file (ex 'chmod 755 ./itunes')
#			- import this script into your bin director (ex '/usr/bin' or '~/bin')

from os import system as cmd
from sys import argv as args

def showHelp():
	helpHeader = "----------------------------------------------------------"
	print helpHeader+"\n  iTunes Command Line Interface\n"+helpHeader
	print "Usage: %s <option>"%args[0]
	print """Options:
  status	= Shows iTunes' status, current artist, and track. 
  play		= Start playing iTunes.
  stop		= Stop iTunes
  pause		= Pause iTunes.
  playpause	= Play/Pause iTunes.
  next		= Go to the next track.
  prev		= Go to the previous track.
  mute		= Mute iTunes' volume.
  unmute	= Unmute iTunes' volume.
  vol up	= Increase iTunes' volume by 10%
  vol down	= Increase iTunes' volume by 10%
  vol #		= Set iTunes' volume to # [0-100]
  quit		= Quit iTunes
  launch	= Launch iTunes
  playlist @	= Play iTunes' playlist named @"
  list		= list playlists.
  shuf		= turn on shuffle playlist
  noshuf	= turn off shuffle playlist
  ostream	= open stream
  help		= what's showing now"""
	myException(helpHeader)

def myException(x):
	print x
	raise SystemExit
def defHelp():
	myException(" No arguments provided - Usage: %s <option>\n for a list of commands: %s -h"%(args[0],args[0]))
def play():
	print "Playing iTunes"
	cmd('osascript -e \'tell application "iTunes" to play\'')
def stop():
	print "Stopping iTunes"
	cmd('osascript -e \'tell application "iTunes" to stop\'')
def pause():
	print "Pausing Itunes"
	cmd('osascript -e \'tell application "iTunes" to pause\'')
def playpause():
	print "Play/Pause Itunes"
	cmd('osascript -e \'tell application "iTunes" to playpause\'')
def next():
	print "Going to the next track"
	cmd('osascript -e \'tell application "iTunes" to next track\'')
def prev():
	print "Going to the previous track"
	cmd('osascript -e \'tell application "iTunes" to previous track\'')
def mute():
	print "Muting iTunes volume level."
	cmd('osascript -e \'tell application "iTunes" to set mute to true\'')
def unmute():
	print "Unmuting iTunes volume level."
	cmd('osascript -e \'tell application "iTunes" to set mute to false\'')
def quit():
	print "Quitting iTunes"
	cmd('osascript -e \'tell application "iTunes" to quit\'')
def launch():
	print "Launching iTunes"
	cmd('osascript -e \'tell application "iTunes" to launch\'')
def shuf():
	print "Shuffling current playlist"
	cmd('osascript -e \'tell application "iTunes" to set shuffle of current playlist to 1\'')
def noshuf():
	print "No longer shuffling current playlist"
	cmd('osascript -e \'tell application "iTunes" to set shuffle of current playlist to 0\'')
def ostream():
	try:
		print "Playing playlist %s"%(args[2])
		#cmd('osascript -e \'tell application "iTunes"\' -e "open location \"%s\"" -e "end tell"\''%(args[2]))
		cmd('osascript -e \'tell application "iTunes"\' -e \'open location "%s"\' -e \'end tell\''%(args[2]))
	except:
		myException("Please provide the stream location you want to play")
def status():
	cmd('osascript -e \'tell application "iTunes" to player state as string\' > /tmp/iTuneState')
	f = open('/tmp/iTuneState', 'r')
	s = f.readline().strip()
	print "iTunes is currently %s"%(s)
	cmd('rm /tmp/iTuneState')
	shufstat()
	if s == "playing":
		trackstat()
def trackstat():
	cmd('osascript -e \'tell application "iTunes" to name of current playlist as string\' > /tmp/iTunesPlaylist')
	cmd('osascript -e \'tell application "iTunes" to artist of current track as string\' >> /tmp/iTunesPlaylist')
	cmd('osascript -e \'tell application "iTunes" to name of current track as string\' >> /tmp/iTunesPlaylist')
	f = open('/tmp/iTunesPlaylist', 'r')
	s = f.read()
	x,y,z,a = s.split('\n')
	print "Current track %s: %s, on playlist \"%s\""%(y,z,x)
	cmd('rm /tmp/iTunesPlaylist')
def shufstat():
	cmd("osascript -e 'tell application \"iTunes\" to get shuffle of current playlist' > /tmp/iTunesShuffle")
	f = open('/tmp/iTunesShuffle', 'r')
	s = f.readline().strip()
	print "Shuffling: %s"%(s)
	cmd('rm /tmp/iTunesShuffle')
def vol():
	print "Changing iTunes volume level."
	cmd('osascript -e \'tell application "iTunes" to get (sound volume as integer)\' > /tmp/iTunesVol')
	f = open('/tmp/iTunesVol')
	s = int(f.readline().strip())
	try: args[2]
	except: myException("could not understand your volume command\n'up', 'down', or integer value (ie. '60')")
	if args[2] == "up":
		newvol = s+10
	elif args[2] == "down":
		newvol = s-10
	else:
		try:
			newvol = int(args[2])
		except:
			myException("could not understand your volume command\n'up', 'down', or integer value (ie. '60')")
	cmd('osascript -e \'tell application "iTunes" to set sound volume to (%i as integer)\''%(newvol))
	print "from %i to %i"%(s,newvol)
	cmd('rm /tmp/iTunesVol')
def playlist():
	try:
		print "Changing iTunes plalist to %s"%(args[2])
		cmd('osascript -e \'tell application "iTunes"\' -e \'set the new_playlist to "%s" as string\' -e "play playlist new_playlist" -e "end tell"'%(args[2]))
	except:
		myException("Pleasae define the playlist you want to play")
def llist():
	print "Listing available playlists:"
	cmd('osascript -e \'tell application "iTunes"\' -e \'name of every user playlist of source "Library"\' -e "end tell" > /tmp/iTunesPlaylists')
	f = open('/tmp/iTunesPlaylists')
	s = f.read()
	s = s.replace("\n","")
	print s
	cmd('rm /tmp/iTunesPlaylists')

# if no arguments then show help and exit
try: args[1]
except: defHelp()#showHelp()

# switch/case like statement
action = {
	"status": status,	"play": play,					"pause": pause,		"playpause": playpause,
	"next": next,			"prev": prev,					"mute": mute,			"unmute": unmute,	
	"vol": vol,				"track": trackstat,			"playlist": playlist,		"list": llist,
	"stop": stop,			"quit": quit,					"launch": launch,		"shuf": shuf,
	"noshuf": noshuf,	"ostream": ostream,		"shufstat": shufstat,	"-h": showHelp,
	"help": showHelp
}
action.get(args[1], showHelp)()