/* Sound code copied from Water Tower */
#include "SoundManager.h"
#include "Settings.h"

void InitSoundManager(VSoundManager * sm) {
  OSErr error;
  int wSound;
  
  sm->NumberOfSounds = NUMBEROFSOUNDS;
  sm->SoundAvailable = 1;
  sm->Sounds = (VSound *) NewPtr(sizeof(VSound) * sm->NumberOfSounds);
  for (wSound = 0; wSound < sm->NumberOfSounds; wSound++) {
    error = LoadSound(&sm->Sounds[wSound], (wSound + BASESOUNDRESID));
    if (error != noErr) {
      sm->SoundAvailable = 0;
      break;
    }
  }
  error = AllocateSoundChannels(sm);
  if (error != noErr) {
    sm->SoundAvailable = 0;
  }
  sm->CurrentSoundChannel = 0;
}

void CleanUpSoundManager(VSoundManager * sm) {
  int wSound;
  
  CleanUpSoundChannels(sm);
  for (wSound = 0; wSound < sm->NumberOfSounds; wSound++) {
    CleanUpSound(&sm->Sounds[wSound]);
  }
  DisposePtr((Ptr) sm->Sounds);
}

void SuspendSoundManager(VSoundManager * sm) {
  CleanUpSoundChannels(sm);
}

void ResumeSoundManager(VSoundManager * sm) {
  OSErr error;
  
  error = AllocateSoundChannels(sm);
  if (error != noErr) {
    sm->SoundAvailable = 0;
  }
}

OSErr AllocateSoundChannels(VSoundManager * sm) {
  OSErr error;
  short wChannel;
  
  for (wChannel = 0; wChannel < NUMBEROFSOUNDCHANNELS; wChannel++) {
    sm->SoundChannels[wChannel] = (SndChannelPtr) NewPtr(sizeof(SndChannel));
    if (sm->SoundChannels[wChannel] == NULL) return memFullErr;
    sm->SoundChannels[wChannel]->qLength = 6;
    error = SndNewChannel(&sm->SoundChannels[wChannel], sampledSynth, initMono, NULL);
    if (error != noErr) {
      while (wChannel > 0) {
        wChannel--;
        DisposePtr((Ptr) sm->SoundChannels[wChannel]);
        sm->SoundChannels[wChannel] = NULL;
      }
      return error;
    }
  }
  return noErr;
}

void CleanUpSoundChannels(VSoundManager * sm) {
  short wChannel;
  SndCommand cmd;
  
  for (wChannel = 0; wChannel < NUMBEROFSOUNDCHANNELS; wChannel++) {
    if (sm->SoundChannels[wChannel] != NULL) {
      cmd.cmd = flushCmd;
      cmd.param1 = 0;
      cmd.param2 = 0;
      SndDoImmediate(sm->SoundChannels[wChannel], &cmd);
      cmd.cmd = quietCmd;
      SndDoImmediate(sm->SoundChannels[wChannel], &cmd);
      SndDisposeChannel(sm->SoundChannels[wChannel], 1);
      DisposePtr((Ptr) sm->SoundChannels[wChannel]);
      sm->SoundChannels[wChannel] = NULL;
    }
  }
}

OSErr LoadSound(VSound * s, int ResID) {
  OSErr error;
  
  s->ResID = ResID;
  s->sndList = (SndListHandle) GetResource('snd ', ResID);
  error = ResError();
  if (s->sndList == NULL || error != noErr) {
    if (error != noErr) error = memFullErr; /* Paranoia */
    return error;
  }
  HLock((Handle) s->sndList);
  return noErr;
}

void CleanUpSound(VSound * s) {
  if (s->sndList != NULL) {
    ReleaseResource((Handle) s->sndList);
    s->sndList = NULL;
  }
}

void PlaySound(VSoundManager * sm, int soundID) {
  OSErr error;
  SndCommand cmd;
  long offset;
  VSettings * s;
  
  s = GetSettings();
  if (!sm->SoundAvailable || !s->SoundEnabled || sm->SoundChannels[sm->CurrentSoundChannel] == NULL) return;
  if (soundID >= NUMBEROFSOUNDS || soundID < 0) return;
  
  cmd.cmd = flushCmd;
  cmd.param1 = 0;
  cmd.param2 = 0;
  SndDoImmediate(sm->SoundChannels[sm->CurrentSoundChannel], &cmd);
  
  cmd.cmd = quietCmd;
  SndDoImmediate(sm->SoundChannels[sm->CurrentSoundChannel], &cmd);
  
  error = GetSoundHeaderOffset(sm->Sounds[soundID].sndList, &offset);
  if (error != noErr) return;
  
  cmd.cmd = bufferCmd;
  cmd.param1 = 0;
  cmd.param2 = (long) ((Ptr) *sm->Sounds[soundID].sndList + offset);
  SndDoCommand(sm->SoundChannels[sm->CurrentSoundChannel], &cmd, 0);
  
  sm->CurrentSoundChannel++;
  if (sm->CurrentSoundChannel >= NUMBEROFSOUNDCHANNELS) sm->CurrentSoundChannel = 0;
}


Boolean AnySoundsPlaying(VSoundManager * sm) {
  short wChannel;
  OSErr error;
  SCStatus status;
  
  for (wChannel = 0; wChannel < NUMBEROFSOUNDCHANNELS; wChannel++) {
    error = SndChannelStatus(sm->SoundChannels[wChannel], sizeof(SCStatus), &status);
    if (error == noErr) {
      if (status.scChannelBusy) return 1;
    }
  }
  return 0;
}

VSoundManager * GetSoundManager() {
  static VSoundManager * sm = NULL;
  
  if (sm == NULL) {
    sm = (VSoundManager *) NewPtr(sizeof(VSoundManager));
    InitSoundManager(sm);
  }
  return sm;
}