// Copyright (c) 2012-2015, The CryptoNote developers, The Bytecoin developers
//
// This file is part of Bytecoin.
//
// Bytecoin 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 3 of the License, or
// (at your option) any later version.
//
// Bytecoin 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 Bytecoin.  If not, see <http://www.gnu.org/licenses/>.

#pragma once

#ifdef _WIN32
#include <io.h>
#ifndef NOMINMAX
#define NOMINMAX
#endif
#include <windows.h>
#endif

#include <fstream>

#include <boost/archive/binary_oarchive.hpp>
#include <boost/archive/binary_iarchive.hpp>

namespace tools
{
  template<class t_object>
  bool serialize_obj_to_file(t_object& obj, const std::string& file_path)
  {
    try {
#ifdef _WIN32
      // Need to know HANDLE of file to call FlushFileBuffers
      HANDLE data_file_handle = ::CreateFile(file_path.c_str(), GENERIC_WRITE, 0, NULL, CREATE_ALWAYS, FILE_ATTRIBUTE_NORMAL, NULL);
      if (INVALID_HANDLE_VALUE == data_file_handle)
        return false;

      int data_file_descriptor = _open_osfhandle((intptr_t)data_file_handle, 0);
      if (-1 == data_file_descriptor) {
        ::CloseHandle(data_file_handle);
        return false;
      }

      FILE* data_file_file = _fdopen(data_file_descriptor, "wb");
      if (0 == data_file_file) {
        // Call CloseHandle is not necessary
        _close(data_file_descriptor);
        return false;
      }

      // HACK: undocumented constructor, this code may not compile
      std::ofstream data_file(data_file_file);
      if (data_file.fail()) {
        // Call CloseHandle and _close are not necessary
        fclose(data_file_file);
        return false;
      }
#else
      std::ofstream data_file;
      data_file.open(file_path , std::ios_base::binary | std::ios_base::out| std::ios::trunc);
      if (data_file.fail())
        return false;
#endif

      boost::archive::binary_oarchive a(data_file);
      a << obj;
      if (data_file.fail())
        return false;

      data_file.flush();
#ifdef _WIN32
      // To make sure the file is fully stored on disk
      ::FlushFileBuffers(data_file_handle);
      fclose(data_file_file);
#endif

      return true;
    } catch (std::exception&) {
      return false;
    }
  }

  template<class t_object>
  bool unserialize_obj_from_file(t_object& obj, const std::string& file_path)
  {
    try {
      std::ifstream data_file;  
      data_file.open( file_path, std::ios_base::binary | std::ios_base::in);
      if(data_file.fail())
        return false;
      boost::archive::binary_iarchive a(data_file);

      a >> obj;
      return !data_file.fail();
    } catch (std::exception&) {
      return false;
    }
  }
}