#include "aomusicplayer.h"

#ifdef BASSAUDIO
AOMusicPlayer::AOMusicPlayer(QWidget *parent, AOApplication *p_ao_app)
{
  m_parent = parent;
  ao_app = p_ao_app;
}

AOMusicPlayer::~AOMusicPlayer()
{
  for (int n_stream = 0 ; n_stream < m_channelmax ; ++n_stream)
  {
    BASS_ChannelStop(m_stream_list[n_stream]);
  }
}

void AOMusicPlayer::play(QString p_song, int channel, bool loop, int effect_flags)
{
  channel = channel % m_channelmax;
  if (channel < 0) //wtf?
      return;
  QString f_path = ao_app->get_music_path(p_song);

  unsigned int flags = BASS_STREAM_PRESCAN | BASS_STREAM_AUTOFREE | BASS_UNICODE | BASS_ASYNCFILE;
  if (loop)
    flags |= BASS_SAMPLE_LOOP;

  DWORD newstream;
  if (f_path.endsWith(".opus"))
    newstream = BASS_OPUS_StreamCreateFile(FALSE, f_path.utf16(), 0, 0, flags);
  else
    newstream = BASS_StreamCreateFile(FALSE, f_path.utf16(), 0, 0, flags);

  if (ao_app->get_audio_output_device() != "default")
    BASS_ChannelSetDevice(m_stream_list[channel], BASS_GetDevice());

  QString d_path = f_path + ".txt";

  loop_start = 0;
  loop_end = BASS_ChannelGetLength(newstream, BASS_POS_BYTE);
  if (loop && file_exists(d_path)) //Contains loop/etc. information file
  {
    QStringList lines = ao_app->read_file(d_path).split("\n");
    foreach (QString line, lines)
    {
      QStringList args = line.split("=");
      if (args.size() < 2)
        continue;
      QString arg = args[0].trimmed();

      float sample_rate;
      BASS_ChannelGetAttribute(newstream, BASS_ATTRIB_FREQ, &sample_rate);

      //Grab number of bytes for sample size
      int sample_size = 16/8;

      //number of channels (stereo/mono)
      int num_channels = 2;

      //Calculate the bytes for loop_start/loop_end to use with the sync proc
      QWORD bytes = static_cast<QWORD>(args[1].trimmed().toFloat() * sample_size * num_channels);
      if (arg == "loop_start")
        loop_start = bytes;
      else if (arg == "loop_length")
        loop_end = loop_start + bytes;
      else if (arg == "loop_end")
        loop_end = bytes;
    }
    qDebug() << "Found data file for song" << p_song << "length" << BASS_ChannelGetLength(newstream, BASS_POS_BYTE) << "loop start" << loop_start << "loop end" << loop_end;
  }

  if (BASS_ChannelIsActive(m_stream_list[channel]) == BASS_ACTIVE_PLAYING)
  {
    DWORD oldstream = m_stream_list[channel];

    if (effect_flags & SYNC_POS)
    {
      BASS_ChannelLock(oldstream, true);
      //Sync it with the new sample
      BASS_ChannelSetPosition(newstream, BASS_ChannelGetPosition(oldstream, BASS_POS_BYTE), BASS_POS_BYTE);
      BASS_ChannelLock(oldstream, false);
    }

    if (effect_flags & FADE_OUT)
    {
      //Fade out the other sample and stop it (due to -1)
      BASS_ChannelSlideAttribute(oldstream, BASS_ATTRIB_VOL|BASS_SLIDE_LOG, -1, 4000);
    }
    else
      BASS_ChannelStop(oldstream); //Stop the sample since we don't need it anymore
  }
  else
    BASS_ChannelStop(m_stream_list[channel]);

  m_stream_list[channel] = newstream;
  BASS_ChannelPlay(m_stream_list[channel], false);
  if (effect_flags & FADE_IN)
  {
    //Fade in our sample
    BASS_ChannelSetAttribute(newstream, BASS_ATTRIB_VOL, 0);
    BASS_ChannelSlideAttribute(newstream, BASS_ATTRIB_VOL, static_cast<float>(m_volume[channel] / 100.0f), 1000);
  }
  else
    this->set_volume(m_volume[channel], channel);

  this->set_looping(loop); //Have to do this here due to any crossfading-related changes, etc.
}

void AOMusicPlayer::stop(int channel)
{
    BASS_ChannelStop(m_stream_list[channel]);
}

void AOMusicPlayer::set_volume(int p_value, int channel)
{
  m_volume[channel] = p_value;
  float volume = m_volume[channel] / 100.0f;
  if (channel < 0)
  {
    for (int n_stream = 0 ; n_stream < m_channelmax ; ++n_stream)
    {
      BASS_ChannelSetAttribute(m_stream_list[n_stream], BASS_ATTRIB_VOL, volume);
    }
  }
  else
  {
    BASS_ChannelSetAttribute(m_stream_list[channel], BASS_ATTRIB_VOL, volume);
  }
}

void CALLBACK loopProc(HSYNC handle, DWORD channel, DWORD data, void *user)
{
  QWORD loop_start = *(static_cast<unsigned *>(user));
  BASS_ChannelLock(channel, true);
  BASS_ChannelSetPosition(channel, loop_start, BASS_POS_BYTE);
  BASS_ChannelLock(channel, false);
}

void AOMusicPlayer::set_looping(bool toggle, int channel)
{
  m_looping = toggle;
  if (!m_looping)
  {
    if (BASS_ChannelFlags(m_stream_list[channel], 0, 0) & BASS_SAMPLE_LOOP)
      BASS_ChannelFlags(m_stream_list[channel], 0, BASS_SAMPLE_LOOP); // remove the LOOP flag
    BASS_ChannelRemoveSync(m_stream_list[channel], loop_sync[channel]);
    loop_sync[channel] = 0;
  }
  else
  {
    BASS_ChannelFlags(m_stream_list[channel], BASS_SAMPLE_LOOP, BASS_SAMPLE_LOOP); // set the LOOP flag
    if (loop_sync[channel] != 0)
    {
      BASS_ChannelRemoveSync(m_stream_list[channel], loop_sync[channel]); //remove the sync
      loop_sync[channel] = 0;
    }
    if (loop_start > 0)
    {
      if (loop_end == 0)
        loop_end = BASS_ChannelGetLength(m_stream_list[channel], BASS_POS_BYTE);
      if (loop_end > 0) //Don't loop zero length songs even if we're asked to
        loop_sync[channel] = BASS_ChannelSetSync(m_stream_list[channel], BASS_SYNC_POS | BASS_SYNC_MIXTIME, loop_end, loopProc, &loop_start);
    }
  }
}
#elif defined(QTAUDIO)
AOMusicPlayer::AOMusicPlayer(QWidget *parent, AOApplication *p_ao_app)
{
  m_parent = parent;
  ao_app = p_ao_app;
}

AOMusicPlayer::~AOMusicPlayer()
{
  m_player.stop();
}

void AOMusicPlayer::play(QString p_song)
{
  m_player.stop();

  QString f_path = ao_app->get_music_path(p_song);

  m_player.setMedia(QUrl::fromLocalFile(f_path));

  this->set_volume(m_volume);

  m_player.play();
}

void AOMusicPlayer::set_volume(int p_value)
{
  m_volume = p_value;
  m_player.setVolume(m_volume);
}
#else
AOMusicPlayer::AOMusicPlayer(QWidget *parent, AOApplication *p_ao_app)
{
  m_parent = parent;
  ao_app = p_ao_app;
}

AOMusicPlayer::~AOMusicPlayer()
{

}

void AOMusicPlayer::play(QString p_song)
{

}

void AOMusicPlayer::set_volume(int p_value)
{

}
#endif