#include "mxmusicmanager.h"
#include "mxticklemanager.h"
#include "mxomni.h"

#include <windows.h>

DECOMP_SIZE_ASSERT(MxMusicManager, 0x58);

// OFFSET: LEGO1 0x100c05a0
MxMusicManager::MxMusicManager()
{
  Init();
}

// OFFSET: LEGO1 0x100c0630
MxMusicManager::~MxMusicManager()
{
  Destroy(TRUE);
}

// OFFSET: LEGO1 0x100c0b20
void MxMusicManager::DeinitializeMIDI()
{
  m_criticalSection.Enter();

  if (m_MIDIInitialized)
  {
    m_MIDIInitialized = FALSE;
    midiStreamStop(m_MIDIStreamH);
    midiOutUnprepareHeader(m_MIDIStreamH, m_MIDIHdrP, sizeof(MIDIHDR));
    midiOutSetVolume(m_MIDIStreamH, m_MIDIVolume);
    midiStreamClose(m_MIDIStreamH);
    delete m_MIDIHdrP;
    InitData();
  }

  m_criticalSection.Leave();
}

// OFFSET: LEGO1 0x100c0690
void MxMusicManager::Init()
{
  m_multiplier = 100;
  InitData();
}

// OFFSET: LEGO1 0x100c06a0
void MxMusicManager::InitData()
{
  m_MIDIStreamH = 0;
  m_MIDIInitialized = FALSE;
  m_unk38 = 0;
  m_unk3c = 0;
  m_unk40 = 0;
  m_unk44 = 0;
  m_unk48 = 0;
  m_MIDIHdrP = NULL;
}

// OFFSET: LEGO1 0x100c06c0
void MxMusicManager::Destroy(MxBool p_fromDestructor)
{
  if (m_thread)
  {
    m_thread->Terminate();
    if (m_thread)
    {
      delete m_thread;
    }
  }
  else
  {
    TickleManager()->UnregisterClient(this);
  }

  m_criticalSection.Enter();
  DeinitializeMIDI();
  Init();
  m_criticalSection.Leave();

  if (!p_fromDestructor)
  {
    MxAudioManager::Destroy();
  }
}

// OFFSET: LEGO1 0x100c0930
void MxMusicManager::Destroy()
{
  Destroy(FALSE);
}

// OFFSET: LEGO1 0x100c09a0
MxS32 MxMusicManager::CalculateVolume(MxS32 p_volume)
{
  MxS32 result = (p_volume * 0xffff) / 100;
  return (result << 0x10) | result;
}

// OFFSET: LEGO1 0x100c07f0
void MxMusicManager::SetMIDIVolume()
{
  MxS32 result = (m_volume * m_multiplier) / 0x64;
  HMIDISTRM streamHandle = m_MIDIStreamH;

  if (streamHandle)
  {
    MxS32 volume = CalculateVolume(result);
    midiOutSetVolume(streamHandle, volume);
  }
}

// OFFSET: LEGO1 0x100c0940
void MxMusicManager::SetVolume(MxS32 p_volume)
{
  MxAudioManager::SetVolume(p_volume);
  m_criticalSection.Enter();
  SetMIDIVolume();
  m_criticalSection.Leave();
}

// OFFSET: LEGO1 0x100c0840
MxResult MxMusicManager::StartMIDIThread(MxU32 p_frequencyMS, MxBool p_createThread)
{
  MxResult status = FAILURE;
  MxBool locked = FALSE;

  if (MxAudioManager::InitPresenters() == SUCCESS) {
    if (p_createThread) {
      m_criticalSection.Enter();
      locked = TRUE;
      m_thread = new MxTickleThread(this, p_frequencyMS);

      if (!m_thread || m_thread->Start(0, 0) != SUCCESS)
        goto done;
    }
    else
      TickleManager()->RegisterClient(this, p_frequencyMS);
    
    status = SUCCESS;
  }

done:
  if (status != SUCCESS)
    Destroy();

  if (locked)
    m_criticalSection.Leave();

  return status;
}