/* 
 * IDxDiagContainer Implementation
 * 
 * Copyright 2004 Raphael Junqueira
 *
 * This library 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 library 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 library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
 *
 */

#include "config.h"

#define COBJMACROS
#include "dxdiag_private.h"
#include "wine/debug.h"
#include "wine/unicode.h"

WINE_DEFAULT_DEBUG_CHANNEL(dxdiag);

/* IDxDiagContainer IUnknown parts follow: */
static HRESULT WINAPI IDxDiagContainerImpl_QueryInterface(PDXDIAGCONTAINER iface, REFIID riid, LPVOID *ppobj)
{
    IDxDiagContainerImpl *This = (IDxDiagContainerImpl *)iface;

    if (!ppobj) return E_INVALIDARG;

    if (IsEqualGUID(riid, &IID_IUnknown)
        || IsEqualGUID(riid, &IID_IDxDiagContainer)) {
        IUnknown_AddRef(iface);
        *ppobj = This;
        return S_OK;
    }

    WARN("(%p)->(%s,%p),not found\n",This,debugstr_guid(riid),ppobj);
    *ppobj = NULL;
    return E_NOINTERFACE;
}

static ULONG WINAPI IDxDiagContainerImpl_AddRef(PDXDIAGCONTAINER iface) {
    IDxDiagContainerImpl *This = (IDxDiagContainerImpl *)iface;
    ULONG refCount = InterlockedIncrement(&This->ref);

    TRACE("(%p)->(ref before=%u)\n", This, refCount - 1);

    DXDIAGN_LockModule();

    return refCount;
}

static ULONG WINAPI IDxDiagContainerImpl_Release(PDXDIAGCONTAINER iface) {
    IDxDiagContainerImpl *This = (IDxDiagContainerImpl *)iface;
    ULONG refCount = InterlockedDecrement(&This->ref);

    TRACE("(%p)->(ref before=%u)\n", This, refCount + 1);

    if (!refCount) {
        IDxDiagProvider_Release(This->pProv);
        HeapFree(GetProcessHeap(), 0, This);
    }

    DXDIAGN_UnlockModule();
    
    return refCount;
}

/* IDxDiagContainer Interface follow: */
static HRESULT WINAPI IDxDiagContainerImpl_GetNumberOfChildContainers(PDXDIAGCONTAINER iface, DWORD* pdwCount) {
  IDxDiagContainerImpl *This = (IDxDiagContainerImpl *)iface;
  TRACE("(%p)\n", iface);
  if (NULL == pdwCount) {
    return E_INVALIDARG;
  }
  *pdwCount = This->cont->nSubContainers;
  return S_OK;
}

static HRESULT WINAPI IDxDiagContainerImpl_EnumChildContainerNames(PDXDIAGCONTAINER iface, DWORD dwIndex, LPWSTR pwszContainer, DWORD cchContainer) {
  IDxDiagContainerImpl *This = (IDxDiagContainerImpl *)iface;
  IDxDiagContainerImpl_Container *p;
  DWORD i = 0;

  TRACE("(%p, %u, %p, %u)\n", iface, dwIndex, pwszContainer, cchContainer);

  if (NULL == pwszContainer || 0 == cchContainer) {
    return E_INVALIDARG;
  }

  LIST_FOR_EACH_ENTRY(p, &This->cont->subContainers, IDxDiagContainerImpl_Container, entry)
  {
    if (dwIndex == i) {
      TRACE("Found container name %s, copying string\n", debugstr_w(p->contName));
      lstrcpynW(pwszContainer, p->contName, cchContainer);
      return (cchContainer <= strlenW(p->contName)) ?
              DXDIAG_E_INSUFFICIENT_BUFFER : S_OK;
    }
    ++i;
  }

  TRACE("Failed to find container name at specified index\n");
  *pwszContainer = '\0';
  return E_INVALIDARG;
}

static HRESULT IDxDiagContainerImpl_GetChildContainerInternal(IDxDiagContainerImpl_Container *cont, LPCWSTR pwszContainer, IDxDiagContainerImpl_Container **subcont) {
  IDxDiagContainerImpl_Container *p;

  LIST_FOR_EACH_ENTRY(p, &cont->subContainers, IDxDiagContainerImpl_Container, entry)
  {
    if (0 == lstrcmpW(p->contName, pwszContainer)) {
      *subcont = p;
      return S_OK;
    }
  }

  return E_INVALIDARG;
}

static HRESULT WINAPI IDxDiagContainerImpl_GetChildContainer(PDXDIAGCONTAINER iface, LPCWSTR pwszContainer, IDxDiagContainer **ppInstance) {
  IDxDiagContainerImpl *This = (IDxDiagContainerImpl *)iface;
  IDxDiagContainerImpl_Container *pContainer = This->cont;
  LPWSTR tmp, orig_tmp;
  INT tmp_len;
  WCHAR* cur;
  HRESULT hr = E_INVALIDARG;

  TRACE("(%p, %s, %p)\n", iface, debugstr_w(pwszContainer), ppInstance);

  if (NULL == ppInstance || NULL == pwszContainer) {
    return E_INVALIDARG;
  }

  *ppInstance = NULL;

  tmp_len = strlenW(pwszContainer) + 1;
  orig_tmp = tmp = HeapAlloc(GetProcessHeap(), 0, tmp_len * sizeof(WCHAR));
  if (NULL == tmp) return E_FAIL;
  lstrcpynW(tmp, pwszContainer, tmp_len);

  cur = strchrW(tmp, '.');
  while (NULL != cur) {
    *cur = '\0'; /* cut tmp string to '.' */
    if (!*(cur + 1)) break; /* Account for a lone terminating period, as in "cont1.cont2.". */
    TRACE("Trying to get parent container %s\n", debugstr_w(tmp));
    hr = IDxDiagContainerImpl_GetChildContainerInternal(pContainer, tmp, &pContainer);
    if (FAILED(hr))
      goto on_error;
    cur++; /* go after '.' (just replaced by \0) */
    tmp = cur;
    cur = strchrW(tmp, '.');
  }

  TRACE("Trying to get container %s\n", debugstr_w(tmp));
  hr = IDxDiagContainerImpl_GetChildContainerInternal(pContainer, tmp, &pContainer);
  if (SUCCEEDED(hr)) {
    hr = DXDiag_CreateDXDiagContainer(&IID_IDxDiagContainer, pContainer, This->pProv, (void **)ppInstance);
    if (SUCCEEDED(hr))
        TRACE("Succeeded in getting the container instance\n");
  }

on_error:
  HeapFree(GetProcessHeap(), 0, orig_tmp);
  return hr;
}

static HRESULT WINAPI IDxDiagContainerImpl_GetNumberOfProps(PDXDIAGCONTAINER iface, DWORD* pdwCount) {
  IDxDiagContainerImpl *This = (IDxDiagContainerImpl *)iface;
  TRACE("(%p)\n", iface);
  if (NULL == pdwCount) {
    return E_INVALIDARG;
  }
  *pdwCount = This->cont->nProperties;
  return S_OK;
}

static HRESULT WINAPI IDxDiagContainerImpl_EnumPropNames(PDXDIAGCONTAINER iface, DWORD dwIndex, LPWSTR pwszPropName, DWORD cchPropName) {
  IDxDiagContainerImpl *This = (IDxDiagContainerImpl *)iface;
  IDxDiagContainerImpl_Property *p;
  DWORD i = 0;

  TRACE("(%p, %u, %p, %u)\n", iface, dwIndex, pwszPropName, cchPropName);

  if (NULL == pwszPropName || 0 == cchPropName) {
    return E_INVALIDARG;
  }

  LIST_FOR_EACH_ENTRY(p, &This->cont->properties, IDxDiagContainerImpl_Property, entry)
  {
    if (dwIndex == i) {
      TRACE("Found property name %s, copying string\n", debugstr_w(p->propName));
      lstrcpynW(pwszPropName, p->propName, cchPropName);
      return (cchPropName <= strlenW(p->propName)) ?
              DXDIAG_E_INSUFFICIENT_BUFFER : S_OK;
    }
    ++i;
  }

  TRACE("Failed to find property name at specified index\n");
  return E_INVALIDARG;
}

static HRESULT WINAPI IDxDiagContainerImpl_GetProp(PDXDIAGCONTAINER iface, LPCWSTR pwszPropName, VARIANT* pvarProp) {
  IDxDiagContainerImpl *This = (IDxDiagContainerImpl *)iface;
  IDxDiagContainerImpl_Property *p;

  TRACE("(%p, %s, %p)\n", iface, debugstr_w(pwszPropName), pvarProp);

  if (NULL == pvarProp || NULL == pwszPropName) {
    return E_INVALIDARG;
  }

  LIST_FOR_EACH_ENTRY(p, &This->cont->properties, IDxDiagContainerImpl_Property, entry)
  {
    if (0 == lstrcmpW(p->propName, pwszPropName)) {
      VariantInit(pvarProp);
      return VariantCopy(pvarProp, &p->vProp);
    }
  }

  return E_INVALIDARG;
}

static const IDxDiagContainerVtbl DxDiagContainer_Vtbl =
{
    IDxDiagContainerImpl_QueryInterface,
    IDxDiagContainerImpl_AddRef,
    IDxDiagContainerImpl_Release,
    IDxDiagContainerImpl_GetNumberOfChildContainers,
    IDxDiagContainerImpl_EnumChildContainerNames,
    IDxDiagContainerImpl_GetChildContainer,
    IDxDiagContainerImpl_GetNumberOfProps,
    IDxDiagContainerImpl_EnumPropNames,
    IDxDiagContainerImpl_GetProp
};


HRESULT DXDiag_CreateDXDiagContainer(REFIID riid, IDxDiagContainerImpl_Container *cont, IDxDiagProvider *pProv, LPVOID *ppobj) {
  IDxDiagContainerImpl* container;

  TRACE("(%p, %p)\n", debugstr_guid(riid), ppobj);
  
  container = HeapAlloc(GetProcessHeap(), 0, sizeof(IDxDiagContainerImpl));
  if (NULL == container) {
    *ppobj = NULL;
    return E_OUTOFMEMORY;
  }
  container->lpVtbl = &DxDiagContainer_Vtbl;
  container->ref = 0; /* will be inited with QueryInterface */
  container->cont = cont;
  container->pProv = pProv;
  IDxDiagProvider_AddRef(pProv);
  return IDxDiagContainerImpl_QueryInterface((PDXDIAGCONTAINER)container, riid, ppobj);
}