from __future__ import print_function

import os
import sys
from PySide import phonon

class MusicBox(object):
	# default media
	media = {}

	# state
	_media_obj = None

	@classmethod
	def init(clazz):
		clazz._output = phonon.Phonon.AudioOutput(phonon.Phonon.MusicCategory)
		clazz._media_obj = phonon.Phonon.MediaObject()
		phonon.Phonon.createPath(clazz._media_obj, clazz._output)

	@classmethod
	def add_music(clazz, name, media_path):
		if name not in clazz.media.iterkeys():
			if not os.path.isfile(media_path):
				return False
			clazz.media[name] = phonon.Phonon.MediaSource(media_path)
		return True

	@classmethod
	def play_music(clazz, name):
		try:
			clazz._media_obj.setCurrentSource(clazz.media[name])
			clazz._media_obj.play()
		except KeyError:
			print("Warning: Song '%s' is missing, not found in media base" % (name,), file=sys.stderr)

	@classmethod
	def stop_music(clazz):
		# use pause so we don't stop having the device open
		clazz._media_obj.pause()