/* Debug and Helper Functions
 *
 * Copyright (C) 2004 Rok Mandeljc
 * Copyright (C) 2004 Raphael Junqueira
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
 */

#define COBJMACROS


#include <stdio.h>
#include <stdarg.h>
#include <string.h>

#include "windef.h"
#include "winbase.h"
#include "winnt.h"
#include "wingdi.h"
#include "winuser.h"

#include "wine/debug.h"
#include "objbase.h"

#include "dmusici.h"
#include "dmusicf.h"
#include "dmusics.h"

#include "dmutils.h"
#include "dmobject.h"

WINE_DEFAULT_DEBUG_CHANNEL(dmfile);

static HRESULT IDirectMusicUtils_IPersistStream_ParseDescGeneric (DMUS_PRIVATE_CHUNK* pChunk, IStream* pStm, LPDMUS_OBJECTDESC pDesc) {

  switch (pChunk->fccID) {
  case DMUS_FOURCC_GUID_CHUNK: {
    TRACE(": GUID chunk\n");
    pDesc->dwValidData |= DMUS_OBJ_OBJECT;
    IStream_Read (pStm, &pDesc->guidObject, pChunk->dwSize, NULL);
    break;
  }
  case DMUS_FOURCC_DATE_CHUNK: {
    TRACE(": file date chunk\n");
    pDesc->dwValidData |= DMUS_OBJ_DATE;
    IStream_Read (pStm, &pDesc->ftDate, pChunk->dwSize, NULL);
    break;
  }
  case DMUS_FOURCC_NAME_CHUNK: {
    TRACE(": name chunk\n");
    pDesc->dwValidData |= DMUS_OBJ_NAME;
    IStream_Read (pStm, pDesc->wszName, pChunk->dwSize, NULL);
    break;
  }
  case DMUS_FOURCC_FILE_CHUNK: {
    TRACE(": file name chunk\n");
    pDesc->dwValidData |= DMUS_OBJ_FILENAME;
    IStream_Read (pStm, pDesc->wszFileName, pChunk->dwSize, NULL);
    break;
  }
  case DMUS_FOURCC_VERSION_CHUNK: {
    TRACE(": version chunk\n");
    pDesc->dwValidData |= DMUS_OBJ_VERSION;
    IStream_Read (pStm, &pDesc->vVersion, pChunk->dwSize, NULL);
    break;
  }
  case DMUS_FOURCC_CATEGORY_CHUNK: {
    TRACE(": category chunk\n");
    pDesc->dwValidData |= DMUS_OBJ_CATEGORY;
    IStream_Read (pStm, pDesc->wszCategory, pChunk->dwSize, NULL);
    break;
  }
  default:
    /* not handled */
    return S_FALSE;
  }

  return S_OK;
}

HRESULT IDirectMusicUtils_IPersistStream_ParseReference (LPPERSISTSTREAM iface, DMUS_PRIVATE_CHUNK* pChunk, IStream* pStm, IDirectMusicObject** ppObject) {
  DMUS_PRIVATE_CHUNK Chunk;
  DWORD ListSize[3], ListCount[3];
  LARGE_INTEGER liMove; /* used when skipping chunks */
  HRESULT hr;

  DMUS_IO_REFERENCE ref;
  DMUS_OBJECTDESC ref_desc;

  memset(&ref, 0, sizeof(ref));
  memset(&ref_desc, 0, sizeof(ref_desc));

  if (pChunk->fccID != DMUS_FOURCC_REF_LIST) {
    ERR(": %s chunk should be a REF list\n", debugstr_fourcc (pChunk->fccID));
    return E_FAIL;
  }

  ListSize[0] = pChunk->dwSize - sizeof(FOURCC);
  ListCount[0] = 0;

  do {
    IStream_Read (pStm, &Chunk, sizeof(FOURCC)+sizeof(DWORD), NULL);
    ListCount[0] += sizeof(FOURCC) + sizeof(DWORD) + Chunk.dwSize;
    TRACE(": %s chunk (size = %d)", debugstr_fourcc (Chunk.fccID), Chunk.dwSize);

    hr = IDirectMusicUtils_IPersistStream_ParseDescGeneric(&Chunk, pStm, &ref_desc);
    if (FAILED(hr)) return hr;
    
    if (hr == S_FALSE) {
      switch (Chunk.fccID) { 
      case DMUS_FOURCC_REF_CHUNK: {
	TRACE(": Reference chunk\n");
	if (Chunk.dwSize != sizeof(DMUS_IO_REFERENCE)) return E_FAIL;
	IStream_Read (pStm, &ref, sizeof(DMUS_IO_REFERENCE), NULL);
	TRACE(" - guidClassID: %s\n", debugstr_dmguid(&ref.guidClassID));
	TRACE(" - dwValidData: %u\n", ref.dwValidData);
	break;
      } 
      default: {
	TRACE(": unknown chunk (irrelevant & skipping)\n");
	liMove.QuadPart = Chunk.dwSize;
	IStream_Seek (pStm, liMove, STREAM_SEEK_CUR, NULL);
	break;						
      }
      }
    }
    TRACE(": ListCount[0] = %d < ListSize[0] = %d\n", ListCount[0], ListSize[0]);
  } while (ListCount[0] < ListSize[0]);

  ref_desc.dwValidData |= DMUS_OBJ_CLASS;
  ref_desc.guidClass = ref.guidClassID;

  TRACE("** DM Reference Begin of Load ***\n");
  TRACE("With Desc:\n");
  dump_DMUS_OBJECTDESC(&ref_desc);

  {
    LPDIRECTMUSICGETLOADER pGetLoader = NULL;
    LPDIRECTMUSICLOADER pLoader = NULL;

    IStream_QueryInterface (pStm, &IID_IDirectMusicGetLoader, (LPVOID*)&pGetLoader);
    IDirectMusicGetLoader_GetLoader (pGetLoader, &pLoader);
    IDirectMusicGetLoader_Release (pGetLoader);
  
    hr = IDirectMusicLoader_GetObject (pLoader, &ref_desc, &IID_IDirectMusicObject, (LPVOID*)ppObject);
    IDirectMusicLoader_Release (pLoader); /* release loader */
  }
  TRACE("** DM Reference End of Load ***\n");

  return hr;
}