import os, xmms

import playlist, util

def cmd_quit(ui, start, stop, args):
	"""q[!]
		- quit
	Quits the program. The optional '!' forces the termination
	regardless of any unsaved work"""
	ui.shutdown = True

def cmd_number(ui, start, stop, args):
	"""[range]n [playlistid]
		- print the addressed lines
	The lines are printed along with the line/song numbers. See also: 'l'"""
	do_list(ui, start, stop, True, args)

def cmd_list(ui, start, stop, args):
	"""[range]l [playlistid]
		- print the addressed lines
	See also: 'n'"""
	do_list(ui, start, stop, False, args)

def cmd_enqueue(ui, start, stop, args):
	"""a [songid]
		- appends/enqueues a song
	A song at songid position in LIST_DEFAULT is appended to the end of
	the LIST_PRIO playlist. Duplicates are _NOT_ eliminated."""
	try:
		id = int(args[0])-1

		if (id < 0) or \
		   (id >= len(ui.lists[playlist.LIST_DEFAULT])):
			raise ValueError

	except ValueError:
		print "Invalid song id"
		return

	s = ui.lists[playlist.LIST_DEFAULT][id]
	print "Enqueuing song: %s (%s)" % (s["title"], util.strtime(s["time"]))
	ui.lists[playlist.LIST_PRIO].enqueue(s)

def cmd_dequeue(ui, start, stop, args):
	"""[range]d
		- delete/dequeue addressed songs
	Songs in range are removed from the LIST_PRIO playlist. They still
	remain in the LIST_DEFAULT at their original locations."""
	l = ui.lists[playlist.LIST_PRIO]

	max = len(l)
	if not max:
		return

	start = util.fixupint(start, max)
	stop = util.fixupint(stop, max)

	for i in range(start-1, stop):
		s = l[start-1]
		print "Dequeuing song: %s (%s)" % (s["title"],
				util.strtime(s["time"]))
		l.dequeue(s)

def cmd_help(ui, start, stop, args):
	"""h
		- this help screen"""
	keys = args[0].keys()
	keys.sort()
	for c in keys:
		text = args[0][c][0].__doc__.split("\n")[0:2]
		text = "\n".join(text)
		print "  %s" % (text,)

def do_list(ui, start, stop, number, args):
	# get the list id from the argument or default to
	# LIST_PRIO
	try:
		if args[1]:
			listid = int(args[1])
		else:
			listid = playlist.LIST_PRIO

		if listid < 0 or listid >= len(ui.lists):
			raise ValueError
	except ValueError, e:
		print "Invalid list number"
		raise e

	max = len(ui.lists[listid])
	if not max:
		return

	start = util.fixupint(start, max)
	stop = util.fixupint(stop, max)

	# starting number should be less than the ending
	# number, as well as positive; ending number should
	# be less than or equal to the size of the playlist
	if start > stop or \
	   start < 1 or \
	   stop > max:
		raise ValueError

	i = 1
	pfx = ""
	for s in ui.lists[listid]:
		if i < start or i > stop:
			i += 1
			continue

		if number:
			pfx = "%d. " % (i,)

		print "%s%s (%s)" % (pfx, s["title"],
				util.strtime(s["time"]))
		i += 1

def cmd_play(ui, start, stop, args):
	"""x
		- Direct XMMS control: play"""
	xmms.control.play()

def cmd_pause(ui, start, stop, args):
	"""c
		- Direct XMMS control: pause"""
	xmms.control.pause()

def cmd_stop(ui, start, stop, args):
	"""v
		- Direct XMMS control: stop"""
	xmms.control.stop()

def cmd_prev(ui, start, stop, args):
	"""z
		- Direct XMMS control: previous song"""
	xmms.control.playlist_prev()

def cmd_next(ui, start, stop, args):
	"""b
		- Direct XMMS control: next song"""
	xmms.control.playlist_next()

def cmd_shell(ui, start, stop, args):
	"""![command]
		- Execute a shell command"""
	if args[0]:
		os.system(args[0])
	print "!"