import gst


class Song():
	#def __init__(self,info,exitFunc,prnt):
	def __init__(self,info,next):
		self.next = next
		self.info = info
		self.position = 0
		self.player = gst.Pipeline("player")
		self.bin = gst.element_factory_make("playbin",None)
		self.bin.set_property("uri","file://"+self.info.filename)
		self.bin.set_state(gst.STATE_PAUSED)
		self.player.add(self.bin)

		# initialize bus
		bus = self.player.get_bus()
		bus.add_signal_watch()
		bus.connect("message",self.onMessage)
		self.playing = False
		self.hasFile = False

		# Initialize stuff for finding duration
		self.time_format = gst.Format(gst.FORMAT_TIME)


	# Called on bus messages
	def onMessage(self,bus,message):
		t = message.type
		if t == gst.MESSAGE_EOS:
			self.next(None,None)
			self.plause()
		elif t == gst.MESSAGE_ERROR:
			err, debug = message.parse_error()
			self.close()
			print "Error: %s" % err, debug
			print "Trying next song"
			self.next(None,None)


	# Toggle between play and pause
	def plause(self):
		if self.playing == False:
			self.player.set_state(gst.STATE_PLAYING)
			self.playing = True
		else:
			self.player.set_state(gst.STATE_PAUSED)
			self.playing = False


	# Stop playback
	def stop(self):
		self.player.set_state(gst.STATE_PAUSED)
		self.playing = False
		self.current = 0
		#self.player.seek_simple(self.time_format,gst.SEEK_FLAG_FLUSH,self.current)
		self.seek(current)
	
	
	def seek(self,time):
		self.player.seek_simple(self.time_format,gst.SEEK_FLAG_FLUSH,time)


	# Close the song
	def close(self):
		self.player.set_state(gst.STATE_NULL)


	# Print out current running time
	def curTime(self):
		if self.playing == False:
			return (False,False)
		self.position = self.player.query_position(self.time_format,None)[0]/1000000000
		return (True, self.position)