/*
 * COM proxy/stub factory (CStdPSFactory) implementation
 *
 * Copyright 2001 Ove Kåven, TransGaming Technologies
 *
 * 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 <stdarg.h>
#include <stdio.h>
#include <string.h>

#define COBJMACROS

#include "windef.h"
#include "winbase.h"
#include "winerror.h"
#include "winreg.h"

#include "objbase.h"

#include "rpcproxy.h"

#include "wine/debug.h"

#include "cpsf.h"

WINE_DEFAULT_DEBUG_CHANNEL(ole);

static BOOL FindProxyInfo(const ProxyFileInfo **pProxyFileList, REFIID riid, const ProxyFileInfo **pProxyInfo, int *pIndex)
{
  while (*pProxyFileList) {
    if ((*pProxyFileList)->pIIDLookupRtn(riid, pIndex)) {
      *pProxyInfo = *pProxyFileList;
      TRACE("found: ProxyInfo %p Index %d\n", *pProxyInfo, *pIndex);
      return TRUE;
    }
    pProxyFileList++;
  }
  TRACE("not found\n");
  return FALSE;
}

static HRESULT WINAPI CStdPSFactory_QueryInterface(LPPSFACTORYBUFFER iface,
                                                  REFIID riid,
                                                  LPVOID *obj)
{
  CStdPSFactoryBuffer *This = (CStdPSFactoryBuffer *)iface;
  TRACE("(%p)->QueryInterface(%s,%p)\n",iface,debugstr_guid(riid),obj);
  if (IsEqualGUID(&IID_IUnknown,riid) ||
      IsEqualGUID(&IID_IPSFactoryBuffer,riid)) {
    *obj = This;
    This->RefCount++;
    return S_OK;
  }
  return E_NOINTERFACE;
}

static ULONG WINAPI CStdPSFactory_AddRef(LPPSFACTORYBUFFER iface)
{
  CStdPSFactoryBuffer *This = (CStdPSFactoryBuffer *)iface;
  TRACE("(%p)->AddRef()\n",iface);
  return ++(This->RefCount);
}

static ULONG WINAPI CStdPSFactory_Release(LPPSFACTORYBUFFER iface)
{
  CStdPSFactoryBuffer *This = (CStdPSFactoryBuffer *)iface;
  TRACE("(%p)->Release()\n",iface);
  return --(This->RefCount);
}

static HRESULT WINAPI CStdPSFactory_CreateProxy(LPPSFACTORYBUFFER iface,
                                               LPUNKNOWN pUnkOuter,
                                               REFIID riid,
                                               LPRPCPROXYBUFFER *ppProxy,
                                               LPVOID *ppv)
{
  CStdPSFactoryBuffer *This = (CStdPSFactoryBuffer *)iface;
  const ProxyFileInfo *ProxyInfo;
  int Index;
  TRACE("(%p)->CreateProxy(%p,%s,%p,%p)\n",iface,pUnkOuter,
       debugstr_guid(riid),ppProxy,ppv);
  if (!FindProxyInfo(This->pProxyFileList,riid,&ProxyInfo,&Index))
    return E_NOINTERFACE;
  return StdProxy_Construct(riid, pUnkOuter, ProxyInfo, Index, iface, ppProxy, ppv);
}

static HRESULT WINAPI CStdPSFactory_CreateStub(LPPSFACTORYBUFFER iface,
                                              REFIID riid,
                                              LPUNKNOWN pUnkServer,
                                              LPRPCSTUBBUFFER *ppStub)
{
  CStdPSFactoryBuffer *This = (CStdPSFactoryBuffer *)iface;
  const ProxyFileInfo *ProxyInfo;
  int Index;
  TRACE("(%p)->CreateStub(%s,%p,%p)\n",iface,debugstr_guid(riid),
       pUnkServer,ppStub);
  if (!FindProxyInfo(This->pProxyFileList,riid,&ProxyInfo,&Index))
    return E_NOINTERFACE;
  return CStdStubBuffer_Construct(riid, pUnkServer, ProxyInfo->pNamesArray[Index],
                                  ProxyInfo->pStubVtblList[Index], iface, ppStub);
}

static const IPSFactoryBufferVtbl CStdPSFactory_Vtbl =
{
  CStdPSFactory_QueryInterface,
  CStdPSFactory_AddRef,
  CStdPSFactory_Release,
  CStdPSFactory_CreateProxy,
  CStdPSFactory_CreateStub
};

/***********************************************************************
 *           NdrDllGetClassObject [RPCRT4.@]
 */
HRESULT WINAPI NdrDllGetClassObject(REFCLSID rclsid, REFIID iid, LPVOID *ppv,
                                   const ProxyFileInfo **pProxyFileList,
                                   const CLSID *pclsid,
                                   CStdPSFactoryBuffer *pPSFactoryBuffer)
{
  TRACE("(%s, %s, %p, %p, %s, %p)\n", debugstr_guid(rclsid),
    debugstr_guid(iid), ppv, pProxyFileList, debugstr_guid(pclsid),
    pPSFactoryBuffer);

  *ppv = NULL;
  if (!pPSFactoryBuffer->lpVtbl) {
    const ProxyFileInfo **pProxyFileList2;
    pPSFactoryBuffer->lpVtbl = &CStdPSFactory_Vtbl;
    pPSFactoryBuffer->RefCount = 0;
    pPSFactoryBuffer->pProxyFileList = pProxyFileList;
    for (pProxyFileList2 = pProxyFileList; *pProxyFileList2; pProxyFileList2++) {
      int i;
      for (i = 0; i < (*pProxyFileList2)->TableSize; i++) {
        /* FIXME: i think that different vtables should be copied for
         * async interfaces */
        void * const *pSrcRpcStubVtbl = (void * const *)&CStdStubBuffer_Vtbl;
        void **pRpcStubVtbl = (void **)&(*pProxyFileList2)->pStubVtblList[i]->Vtbl;
        int j;

        for (j = 0; j < sizeof(IRpcStubBufferVtbl)/sizeof(void *); j++)
          if (!pRpcStubVtbl[j])
            pRpcStubVtbl[j] = pSrcRpcStubVtbl[j];
      }
    }
  }
  if (IsEqualGUID(rclsid, pclsid))
    return IPSFactoryBuffer_QueryInterface((LPPSFACTORYBUFFER)pPSFactoryBuffer, iid, ppv);
  else {
    const ProxyFileInfo *info;
    int index;
    /* otherwise, the dll may be using the iid as the clsid, so
     * search for it in the proxy file list */
    if (FindProxyInfo(pProxyFileList, rclsid, &info, &index))
      return IPSFactoryBuffer_QueryInterface((LPPSFACTORYBUFFER)pPSFactoryBuffer, iid, ppv);

    WARN("class %s not available\n", debugstr_guid(rclsid));
    return CLASS_E_CLASSNOTAVAILABLE;
  }
}

/***********************************************************************
 *           NdrDllCanUnloadNow [RPCRT4.@]
 */
HRESULT WINAPI NdrDllCanUnloadNow(CStdPSFactoryBuffer *pPSFactoryBuffer)
{
  return !(pPSFactoryBuffer->RefCount);
}

/***********************************************************************
 *           NdrDllRegisterProxy [RPCRT4.@]
 */
HRESULT WINAPI NdrDllRegisterProxy(HMODULE hDll,
                                  const ProxyFileInfo **pProxyFileList,
                                  const CLSID *pclsid)
{
  LPSTR clsid;
  char keyname[120], module[MAX_PATH];
  HKEY key, subkey;
  DWORD len;

  TRACE("(%p,%p,%s)\n", hDll, pProxyFileList, debugstr_guid(pclsid));
  UuidToStringA((UUID*)pclsid, (unsigned char**)&clsid);

  /* register interfaces to point to clsid */
  while (*pProxyFileList) {
    unsigned u;
    for (u=0; u<(*pProxyFileList)->TableSize; u++) {
      CInterfaceStubVtbl *proxy = (*pProxyFileList)->pStubVtblList[u];
      PCInterfaceName name = (*pProxyFileList)->pNamesArray[u];
      LPSTR iid;

      TRACE("registering %s %s => %s\n", name, debugstr_guid(proxy->header.piid), clsid);

      UuidToStringA((UUID*)proxy->header.piid, (unsigned char**)&iid);
      snprintf(keyname, sizeof(keyname), "Interface\\{%s}", iid);
      RpcStringFreeA((unsigned char**)&iid);
      if (RegCreateKeyExA(HKEY_CLASSES_ROOT, keyname, 0, NULL, 0,
                          KEY_WRITE, NULL, &key, NULL) == ERROR_SUCCESS) {
        if (name)
          RegSetValueExA(key, NULL, 0, REG_SZ, (LPBYTE)name, strlen(name));
        if (RegCreateKeyExA(key, "ProxyStubClsid32", 0, NULL, 0,
                            KEY_WRITE, NULL, &subkey, NULL) == ERROR_SUCCESS) {
          snprintf(module, sizeof(module), "{%s}", clsid);
          RegSetValueExA(subkey, NULL, 0, REG_SZ, (LPBYTE)module, strlen(module));
          RegCloseKey(subkey);
        }
        RegCloseKey(key);
      }
    }
    pProxyFileList++;
  }

  /* register clsid to point to module */
  snprintf(keyname, sizeof(keyname), "CLSID\\{%s}", clsid);
  len = GetModuleFileNameA(hDll, module, sizeof(module));
  if (len && len < sizeof(module)) {
    TRACE("registering CLSID %s => %s\n", clsid, module);
    if (RegCreateKeyExA(HKEY_CLASSES_ROOT, keyname, 0, NULL, 0,
                        KEY_WRITE, NULL, &key, NULL) == ERROR_SUCCESS) {
      RegSetValueExA(subkey, NULL, 0, REG_SZ, (LPBYTE)"PSFactoryBuffer", strlen("PSFactoryBuffer"));
      if (RegCreateKeyExA(key, "InProcServer32", 0, NULL, 0,
                          KEY_WRITE, NULL, &subkey, NULL) == ERROR_SUCCESS) {
        RegSetValueExA(subkey, NULL, 0, REG_SZ, (LPBYTE)module, strlen(module));
        RegSetValueExA(subkey, "ThreadingModel", 0, REG_SZ, (LPBYTE)"Both", strlen("Both"));
        RegCloseKey(subkey);
      }
      RegCloseKey(key);
    }
  }

  /* done */
  RpcStringFreeA((unsigned char**)&clsid);
  return S_OK;
}

/***********************************************************************
 *           NdrDllUnregisterProxy [RPCRT4.@]
 */
HRESULT WINAPI NdrDllUnregisterProxy(HMODULE hDll,
                                    const ProxyFileInfo **pProxyFileList,
                                    const CLSID *pclsid)
{
  LPSTR clsid;
  char keyname[120], module[MAX_PATH];
  DWORD len;

  TRACE("(%p,%p,%s)\n", hDll, pProxyFileList, debugstr_guid(pclsid));
  UuidToStringA((UUID*)pclsid, (unsigned char**)&clsid);

  /* unregister interfaces */
  while (*pProxyFileList) {
    unsigned u;
    for (u=0; u<(*pProxyFileList)->TableSize; u++) {
      CInterfaceStubVtbl *proxy = (*pProxyFileList)->pStubVtblList[u];
      PCInterfaceName name = (*pProxyFileList)->pNamesArray[u];
      LPSTR iid;

      TRACE("unregistering %s %s <= %s\n", name, debugstr_guid(proxy->header.piid), clsid);

      UuidToStringA((UUID*)proxy->header.piid, (unsigned char**)&iid);
      snprintf(keyname, sizeof(keyname), "Interface\\{%s}", iid);
      RpcStringFreeA((unsigned char**)&iid);
      RegDeleteKeyA(HKEY_CLASSES_ROOT, keyname);
    }
    pProxyFileList++;
  }

  /* unregister clsid */
  snprintf(keyname, sizeof(keyname), "CLSID\\{%s}", clsid);
  len = GetModuleFileNameA(hDll, module, sizeof(module));
  if (len && len < sizeof(module)) {
    TRACE("unregistering CLSID %s <= %s\n", clsid, module);
    RegDeleteKeyA(HKEY_CLASSES_ROOT, keyname);
  }

  /* done */
  RpcStringFreeA((unsigned char**)&clsid);
  return S_OK;
}