/*
   Bacula(R) - The Network Backup Solution

   Copyright (C) 2000-2025 Kern Sibbald

   The original author of Bacula is Kern Sibbald, with contributions
   from many others, a complete list can be found in the file AUTHORS.

   You may use this file and others of this release according to the
   license defined in the LICENSE file, which includes the Affero General
   Public License, v3.0 ("AGPLv3") and some additional permissions and
   terms pursuant to its AGPLv3 Section 7.

   This notice must be preserved when any source code is
   conveyed and/or propagated.

   Bacula(R) is a registered trademark of Kern Sibbald.
*/
/* 
 *  Written by James Harper, October 2008
 */

#include "exchange-fd.h"

file_node_t::file_node_t(char *name, node_t *parent_node) : node_t(name, NODE_TYPE_FILE, parent_node)
{
   backup_file_handle = INVALID_HANDLE_VALUE;
   restore_file_handle = INVALID_HANDLE_VALUE;
   restore_at_file_level = FALSE;
}

file_node_t::~file_node_t()
{
   if (backup_file_handle != INVALID_HANDLE_VALUE)
   {
      //_DebugMessage(100, "closing file handle in destructor\n");
      CloseHandle(backup_file_handle);
   }
   if (restore_file_handle != INVALID_HANDLE_VALUE)
   {
      //_DebugMessage(100, "closing file handle in destructor\n");
      if (restore_at_file_level)
      {
         CloseHandle(restore_file_handle);
      }
      else
      {
         // maybe one day
      }
   }
}

bRC
file_node_t::startBackupFile(exchange_fd_context_t *context, struct save_pkt *sp)
{
   time_t now = time(NULL);
   _DebugMessage(100, "startBackupNode_FILE state = %d\n", state);

   if (context->job_level == 'F' || parent->type == NODE_TYPE_STORAGE_GROUP) {
      sp->fname = full_path;
      sp->link = full_path;
      _DebugMessage(100, "fname = %s\n", sp->fname);
      sp->statp.st_mode = 0700 | S_IFREG;
      sp->statp.st_ctime = now;
      sp->statp.st_mtime = now;
      sp->statp.st_atime = now;
      sp->statp.st_size = (uint64_t)-1;
      sp->type = FT_REG;
      return bRC_OK;
   } else {
      bfuncs->setBaculaValue(context->bpContext, bVarFileSeen, (void *)full_path);
      return bRC_Seen;
   }
}

bRC
file_node_t::endBackupFile(exchange_fd_context_t *context)
{
   _DebugMessage(100, "endBackupNode_FILE state = %d\n", state);

   context->current_node = parent;

   return bRC_OK;
}

bRC
file_node_t::createFile(exchange_fd_context_t *context, struct restore_pkt *rp)
{
   //HrESERestoreOpenFile with name of log file

   _DebugMessage(100, "createFile_FILE state = %d\n", state);
   rp->create_status = CF_EXTRACT;
   return bRC_OK;
}

bRC
file_node_t::endRestoreFile(exchange_fd_context_t *context)
{
   _DebugMessage(100, "endRestoreFile_FILE state = %d\n", state);
   context->current_node = parent;
   return bRC_OK;
}

bRC
file_node_t::pluginIoOpen(exchange_fd_context_t *context, struct io_pkt *io)
{
   HRESULT result;
   HANDLE handle;
   char *tmp = new char[wcslen(filename) + 1];
   wcstombs(tmp, filename, wcslen(filename) + 1);

   _DebugMessage(100, "pluginIoOpen_FILE - filename = %s\n", tmp);
   io->status = 0;
   io->io_errno = 0;
   if (context->job_type == JOB_TYPE_BACKUP)
   {
      _DebugMessage(10, "Calling HrESEBackupOpenFile\n");
      result = HrESEBackupOpenFile(hccx, filename, 65535, 1, &backup_file_handle, &section_size);
      if (result)
      {
         _JobMessage(M_FATAL, "HrESEBackupOpenFile failed with error 0x%08x - %s\n", result, ESEErrorMessage(result));
         backup_file_handle = INVALID_HANDLE_VALUE;
         io->io_errno = 1;
         return bRC_Error;
      }
   }
   else
   {
      _DebugMessage(10, "Calling HrESERestoreOpenFile for '%s'\n", tmp);
      result = HrESERestoreOpenFile(hccx, filename, 1, &restore_file_handle);
      if (result == hrRestoreAtFileLevel)
      {
         restore_at_file_level = true;
         _DebugMessage(100, "Calling CreateFileW for '%s'\n", tmp);
         handle = CreateFileW(filename, GENERIC_WRITE, 0, NULL, CREATE_ALWAYS, FILE_ATTRIBUTE_NORMAL, NULL);
         if (handle == INVALID_HANDLE_VALUE)
         {
            _JobMessage(M_FATAL, "CreateFile failed");
            return bRC_Error;
         }
         restore_file_handle = (void *)handle;
         return bRC_OK;
      }
      else if (result == 0)
      {
         _JobMessage(M_FATAL, "Exchange File IO API not yet supported for restore\n");
         restore_at_file_level = false;
         return bRC_Error;
      }
      else
      {
         _JobMessage(M_FATAL, "HrESERestoreOpenFile failed with error 0x%08x - %s\n", result, ESEErrorMessage(result));
         return bRC_Error;
      }
   }
   return bRC_OK;
}

bRC
file_node_t::pluginIoRead(exchange_fd_context_t *context, struct io_pkt *io)
{
   HRESULT result;
   uint32_t readLength;

   io->status = 0;
   io->io_errno = 0;
   _DebugMessage(200, "Calling HrESEBackupReadFile\n");
   result = HrESEBackupReadFile(hccx, backup_file_handle, io->buf, io->count, &readLength);
   if (result)
   {
      io->io_errno = 1;
      return bRC_Error;
   }
   io->status = readLength;
   size += readLength;
   return bRC_OK;
}

bRC
file_node_t::pluginIoWrite(exchange_fd_context_t *context, struct io_pkt *io)
{
   DWORD bytes_written;

   io->io_errno = 0;
   if (!restore_at_file_level)
      return bRC_Error;

   if (!WriteFile(restore_file_handle, io->buf, io->count, &bytes_written, NULL))
   {
      _JobMessage(M_FATAL, "Write Error");
      return bRC_Error;
   }

   if (bytes_written != (DWORD)io->count)
   {
      _JobMessage(M_FATAL, "Short write");
      return bRC_Error;
   }
   io->status = bytes_written;
   
   return bRC_OK;
}

bRC
file_node_t::pluginIoClose(exchange_fd_context_t *context, struct io_pkt *io)
{
   if (context->job_type == JOB_TYPE_BACKUP)
   {
      _DebugMessage(100, "Calling HrESEBackupCloseFile\n");
      HrESEBackupCloseFile(hccx, backup_file_handle);
      backup_file_handle = INVALID_HANDLE_VALUE;
      return bRC_OK;
   }
   else
   {
      if (restore_at_file_level)
      {
         CloseHandle(restore_file_handle);
         restore_file_handle = INVALID_HANDLE_VALUE;
         return bRC_OK;
      }
      else
      {
         return bRC_OK;
      }
   }
}
