import ctypes
from sound_lib.external import pybass, pybass_fx
from sound_lib.stream import BaseStream
from sound_lib.channel import Channel
from sound_lib.main import bass_call, bass_call_0

class Tempo(BaseStream):
 
 def __init__(self, channel, flags=0, loop=False, software=False, three_d=False, sample_fx=False, autofree=False, decode=False, free_source=False):
  flags = flags | self.flags_for(loop=False, software=False, three_d=False, sample_fx=False, autofree=False, decode=False, free_source=False)
  self.channel = channel
  if isinstance(channel, Channel):
   channel = channel.handle
  handle = bass_call(pybass_fx.BASS_FX_TempoCreate, channel, flags)
  super(Tempo, self).__init__(handle)
  self.add_attributes_to_mapping(
   tempo=pybass_fx.BASS_ATTRIB_TEMPO,
   tempo_pitch=pybass_fx.BASS_ATTRIB_TEMPO_PITCH,
   tempo_freq=pybass_fx.BASS_ATTRIB_TEMPO_FREQ,
  )
 

 @property
 def tempo(self):
  """The tempo of a channel."""
  return self.get_attribute(pybass_fx.BASS_ATTRIB_TEMPO)
 
 @tempo.setter
 def tempo(self, val):
  self.set_attribute('tempo', val)

 @property
 def tempo_pitch(self):
  return self.get_attribute('tempo_pitch')

 @tempo_pitch.setter
 def tempo_pitch(self, val):
  self.set_attribute('tempo_pitch', val)

 @property
 def tempo_freq(self):
  return self.get_attribute('tempo_freq')

 @tempo_freq.setter
 def tempo_freq(self, val):
  self.set_attribute('tempo_freq', val)

 def setup_flag_mapping(self):
  super(Tempo, self).setup_flag_mapping()
  self.flag_mapping.update({
   'free_source': pybass_fx.BASS_FX_FREESOURCE,
  })

 def get_source(self):
  source = pybass_fx.BASS_FX_TempoGetSource(self.handle)
  if source == self.channel.handle:
   source = self.channel
  return source

 source = property(fget=get_source)

 def get_rate_ratio(self):
  return bass_call(pybass_fx.BASS_FX_TempoGetRateRatio, self.handle)

 rate_ratio = property(fget=get_rate_ratio)