#ifdef _WIN32

#ifndef UNICODE

#define UNICODE

#endif

#endif

#include <memory></memory>

#include "tsystem.h"

//#include "tunicode.h"

#include "tfilepath_io.h"

#include "tconvert.h"

#include <time.h></time.h>

#include <sys timeb.h=""></sys>

#include <sys types.h=""></sys>

#include <sys stat.h=""></sys>

#include <errno.h></errno.h>

#include <set></set>

#include <tenv.h></tenv.h>

#undef PLATFORM

#ifdef _MSC_VER

#pragma warning(disable : 4996)

#endif

#ifdef _WIN32

#define PLATFORM WIN32

#include <process.h></process.h>

#include <psapi.h></psapi.h>

#include <io.h></io.h>

#include <stdlib.h></stdlib.h>

#include <direct.h></direct.h>

#include <shellapi.h></shellapi.h>

// gmt: sulla mia macchina cosi' non compila!!!

// #include "winsock2.h"

// #include "lmcons.h"

#include <sys utime.h=""></sys>

#include <lm.h></lm.h>

#endif

#ifdef LINUX

#define PLATFORM LINUX

#include <grp.h></grp.h>

#include <utime.h></utime.h>

#include <sys param.h=""></sys>

#include <unistd.h></unistd.h>

#include <sys types.h=""></sys>

#include <stdio.h></stdio.h>

#include <unistd.h></unistd.h>

#include <dirent.h></dirent.h>

#include <sys dir.h=""></sys>

#include <sys sysinfo.h=""></sys>

#include <sys swap.h=""></sys>

#include <sys statfs.h=""></sys>

#include <pwd.h></pwd.h>

#include <mntent.h></mntent.h>

#include <dlfcn.h></dlfcn.h>

#include <utime.h></utime.h>

#include <sys time.h=""></sys>

#include <qdir></qdir>

#include <qfileinfo></qfileinfo>

#include <qstorageinfo></qstorageinfo>

#include <qtextstream></qtextstream>

#include <qurl></qurl>

#endif

#if defined(MACOSX)

#define PLATFORM MACOSX

#include <grp.h></grp.h>

#include <utime.h></utime.h>

#include <sys param.h=""></sys>

#include <unistd.h></unistd.h>

#include <sys types.h=""></sys>

#include <sys timeb.h="">  // for ftime</sys>

#include <stdio.h></stdio.h>

#include <unistd.h></unistd.h>

#include <dirent.h></dirent.h>

#include <sys dir.h=""></sys>

#include <sys param.h="">  // for getfsstat</sys>

#include <sys ucred.h=""></sys>

#include <sys mount.h=""></sys>

#include <pwd.h></pwd.h>

#include <dlfcn.h></dlfcn.h>

#include "Carbon/Carbon.h"

#endif

#ifdef __sgi

#define PLATFORM SGI

#include <sys param.h=""></sys>

#include <unistd.h></unistd.h>

#include <grp.h></grp.h>

#include <sys dir.h="">  // dirent.h</sys>

#include <sys utime.h=""></sys>

#include <sys swap.h=""></sys>

#include <sys statfs.h=""></sys>

#include <pwd.h></pwd.h>

#include <mntent.h></mntent.h>

#include <dlfcn.h></dlfcn.h>

#endif

#ifndef PLATFORM

PLATFORM_NOT_SUPPORTED

#endif

using namespace std;

#ifdef _WIN32

wstring getFormattedMessage(DWORD lastError) {

  LPVOID lpMsgBuf;

  FormatMessage(FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM |

                    FORMAT_MESSAGE_IGNORE_INSERTS,

                NULL, lastError,

                MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),  // Default language

                (LPTSTR)&lpMsgBuf, 0, NULL);

  int wSize = MultiByteToWideChar(0, 0, (char *)lpMsgBuf, -1, 0, 0);

  if (!wSize) return wstring();

  std::unique_ptr<wchar_t[]> wBuffer(new wchar_t[wSize + 1]);</wchar_t[]>

  MultiByteToWideChar(0, 0, (char *)lpMsgBuf, -1, wBuffer.get(), wSize);

  wBuffer[wSize] = '\0';

  wstring wmsg(wBuffer.get());

  LocalFree(lpMsgBuf);

  return wmsg;

}

#endif

//------------------------------------------------------------

void TSystem::outputDebug(string s) {

#ifdef TNZCORE_LIGHT

#ifdef _WIN32

  OutputDebugString((LPCWSTR)s.c_str());

#else

  cerr << s << endl;

#endif

#else

  qDebug("%s", s.c_str());

#endif

}

//------------------------------------------------------------

int TSystem::getProcessId() { return getpid(); }

//------------------------------------------------------------

bool TSystem::memoryShortage() {

#ifdef _WIN32

  MEMORYSTATUSEX memStatus;

  memStatus.dwLength = sizeof(MEMORYSTATUSEX);

  GlobalMemoryStatusEx(&memStatus);

  assert(memStatus.ullAvailPhys <= memStatus.ullTotalPhys);

  if (memStatus.ullAvailPhys <

      memStatus.ullTotalPhys *

          0.20)  // if available memory is less then 20% of total memory

    return true;

  PROCESS_MEMORY_COUNTERS c;

  c.cb     = sizeof(PROCESS_MEMORY_COUNTERS);

  BOOL ret = GetProcessMemoryInfo(GetCurrentProcess(), &c,

                                  sizeof(PROCESS_MEMORY_COUNTERS));

  assert(ret);

  return c.WorkingSetSize >

         memStatus.ullTotalVirtual *

             0.6;  // if total memory used by this process(WorkingSetSize) is

// half of max allocatable memory

//(ullTotalVirtual: on 32bits machines, tipically it's 2GB)

// It's better "to stay large"; for values >0.6 this function may

// returns that there is memory, but for fragmentation the malloc fails the

// same!

#elif defined(MACOSX)

  // to be done...

  return false;

#elif defined(LINUX)

  // to be done...

  return false;

#else

  @ @ @ERROR : PLATFORM NOT SUPPORTED

#endif

}

//------------------------------------------------------------

TINT64 TSystem::getFreeMemorySize(bool onlyPhisicalMemory) {

  TINT64 totalFree = 0;

#ifdef _WIN32

  MEMORYSTATUSEX buff;

  buff.dwLength = sizeof(MEMORYSTATUSEX);

  GlobalMemoryStatusEx(&buff);

  if (onlyPhisicalMemory)

    return buff.ullAvailPhys >> 10;

  else

    return buff.ullAvailPageFile >> 10;

#elif defined(__sgi)

  // check for virtual memory

  int numberOfResources =

      swapctl(SC_GETNSWP, 0); /* get number of swapping resources configued */

  if (numberOfResources == 0) return 0;

  // avrei voluto fare: struct swaptable *table = new struct swaptable[...]

  struct swaptable *table = (struct swaptable *)calloc(

      1, sizeof(struct swapent) * numberOfResources + sizeof(int));

  table->swt_n = numberOfResources;

  swapctl(SC_LIST, table); /* list all the swapping resources */

  TINT64 virtualFree  = 0;

  TINT64 physicalFree = 0;

  for (int i = 0; i < table->swt_n; i++) {

    virtualFree += table->swt_ent[i].ste_free;

  }

  free(table);

  totalFree = virtualFree << 4 + physicalFree;

#elif defined(LINUX)

  struct sysinfo *sysInfo = (struct sysinfo *)calloc(1, sizeof(struct sysinfo));

  if (!sysinfo(sysInfo)) {

    if (onlyPhisicalMemory)

      totalFree = sysInfo->freeram;

    else

      totalFree = sysInfo->freeram + sysInfo->freeswap;

  } else {

    assert(!"sysinfo function failed");

  }

  free(sysInfo);

#elif defined(MACOSX)

  // to be done...

  totalFree = 512 * 1024;

#else

  @ @ @ERROR : PLATFORM NOT SUPPORTED

#endif

#ifndef _WIN32

#else

#endif

  return totalFree;

}

//------------------------------------------------------------

/*

ostream& operator<<(ostream&out, const TTime  &t)

{

  return out<

}

*/

//------------------------------------------------------------

TINT64 TSystem::getDiskSize(const TFilePath &diskName) {

  TINT64 size = 0;

  if (!diskName.isAbsolute()) {

    assert(0);

    return 0;

  }

#ifndef _WIN32

  struct statfs buf;

#ifdef __sgi

  statfs(::to_string(diskName).c_str(), &buf, sizeof(struct statfs), 0);

#else

  statfs(::to_string(diskName).c_str(), &buf);

#endif

  size = (TINT64)((buf.f_blocks * buf.f_bsize) >> 10);

#else

  DWORD sectorsPerCluster;     // sectors per cluster

  DWORD bytesPerSector;        // bytes per sector

  DWORD numberOfFreeClusters;  // free clusters

  DWORD totalNumberOfClusters;

  BOOL rc = GetDiskFreeSpaceW(diskName.getWideString().c_str(),  // root path

                              §orsPerCluster,     // sectors per cluster

                              &bytesPerSector,        // bytes per sector

                              &numberOfFreeClusters,  // free clusters

                              &totalNumberOfClusters  // total clusters

                              );

  if (!rc)

    throw TSystemException(diskName, getFormattedMessage(GetLastError()));

  else

    size = (totalNumberOfClusters * sectorsPerCluster * bytesPerSector) >> 10;

#endif

  return size;

}

//------------------------------------------------------------

TINT64 TSystem::getFreeDiskSize(const TFilePath &diskName) {

  TINT64 size = 0;

  if (!diskName.isAbsolute()) {

    assert(0);

    return 0;

  }

#ifndef _WIN32

  struct statfs buf;

#ifdef __sgi

  statfs(diskName.getWideString().c_str(), &buf, sizeof(struct statfs), 0);

#else

  statfs(::to_string(diskName).c_str(), &buf);

#endif

  size = (TINT64)(buf.f_bfree * buf.f_bsize) >> 10;

#else

  DWORD sectorsPerCluster;     // sectors per cluster

  DWORD bytesPerSector;        // bytes per sector

  DWORD numberOfFreeClusters;  // free clusters

  DWORD totalNumberOfClusters;

  BOOL rc = GetDiskFreeSpaceW(diskName.getWideString().c_str(),  // root path

                              §orsPerCluster,     // sectors per cluster

                              &bytesPerSector,        // bytes per sector

                              &numberOfFreeClusters,  // free clusters

                              &totalNumberOfClusters  // total clusters

                              );

  if (!rc)  // eccezione... getLastError etc...

    throw TSystemException(diskName, "cannot get disk info!");

  else

    size = (numberOfFreeClusters * sectorsPerCluster * bytesPerSector) >> 10;

#endif

  return size;

}

//------------------------------------------------------------

TINT64 TSystem::getMemorySize(bool onlyPhisicalMemory) {

#ifdef _WIN32

  MEMORYSTATUS buff;

  GlobalMemoryStatus(&buff);

  if (onlyPhisicalMemory)

    return buff.dwTotalPhys >> 10;

  else

    return buff.dwTotalPageFile >> 10;

#elif defined(__sgi)

  int physicalMemory;

  if (swapctl(SC_GETSWAPMAX, &physicalMemory))

    return ((size_t)0);

  else

    return logSwapLibero >> 1;

#elif defined(LINUX)

  struct sysinfo *sysInfo = (struct sysinfo *)calloc(1, sizeof(struct sysinfo));

  TINT64 ret              = 0;

  if (!sysinfo(sysInfo))

    ret = sysInfo->totalram;

  else

    assert(!"sysinfo function failed");

  free(sysInfo);

  return ret;

#elif defined(MACOSX)

  // to be done...

  return 512 * 1024;

#else

  @ @ @ERROR : PLATFORM NOT SUPPORTED

#endif

#ifndef _WIN32

#else

#endif

}

//------------------------------------------------------------

void TSystem::moveFileToRecycleBin(const TFilePath &fp) {

#if defined(_WIN32)

  //

  // from http://msdn.microsoft.com/msdnmag/issues/01/04/c/default.aspx

  //

  // Copy pathname to double-NULL-terminated string.

  //

  wchar_t buf[_MAX_PATH + 1];               // allow one more character

  wcscpy(buf, fp.getWideString().c_str());  // copy caller's path name

  buf[wcslen(buf) + 1] = 0;                 // need two NULLs at end

  SHFILEOPSTRUCTW data;

  memset(&data, 0, sizeof(SHFILEOPSTRUCTW));

  data.fFlags |= FOF_SILENT;          // don't report progress

  data.fFlags |= FOF_NOERRORUI;       // don't report errors

  data.fFlags |= FOF_NOCONFIRMATION;  // don't confirm delete

  data.wFunc = FO_DELETE;             // REQUIRED: delete operation

  data.pFrom = buf;                   // REQUIRED: which file(s)

  data.pTo   = NULL;                  // MUST be NULL

  data.fFlags |= FOF_ALLOWUNDO;       // ..send to Recycle Bin

  int ret = SHFileOperationW(&data);  // do it!

#elif defined(MACOSX)

  FSRef foundRef;

  OSErr err = FSFindFolder(kOnSystemDisk, kTrashFolderType, kDontCreateFolder,

                           &foundRef);

  if (err) {

    assert(false);

    deleteFile(fp);

    return;

  }

  UInt8 path[255];

  err = FSRefMakePath(&foundRef, path, 254);

  if (err) {

    assert(false);

    deleteFile(fp);

    return;

  }

  // TFilePath dest = TFilePath(path)+(fp.getName()+fp.getDottedType());

  string fullNameWithExt = ::to_string(fp);

  int i                  = fullNameWithExt.rfind("/");

  string nameWithExt     = fullNameWithExt.substr(i + 1);

  TFilePath dest         = TFilePath((char *)path) + nameWithExt;

  try {

    renameFile(dest, fp);

  } catch (...) {

    try {

      copyFile(dest, fp);

      deleteFile(fp);

    } catch (...) {

    }

  }

#elif defined(LINUX)

  //

  // From https://stackoverflow.com/questions/17964439/move-files-to-trash-recycle-bin-in-qt

  //

  QString fileToRecycle = fp.getQString();

  QFileInfo FileName(fileToRecycle);

  QDateTime currentTime(QDateTime::currentDateTime());    // get system time

  // check if the file is on the local drive

  const QStorageInfo fileStorageInfo(fileToRecycle);

  const QStorageInfo homeStorageInfo(QDir::homePath());

  const bool isOnHomeDrive = fileStorageInfo == homeStorageInfo;

  QString trashFilePath = QDir::homePath() + "/.local/share/Trash/files/";    // this folder contains deleted files

  QString trashInfoPath = QDir::homePath() + "/.local/share/Trash/info/";     // this folder contains information about the deleted files

  // different paths are used for external drives

  if (!isOnHomeDrive) {

    //trashFilePath = fileStorageInfo.rootPath() + "/.Trash-1000/files/";

    //trashInfoPath = fileStorageInfo.rootPath() + "/.Trash-1000/info/";

    // TODO: Implement this... The standard is /.Trash-<uid>/...</uid>

    outputDebug("Deleting files on external drives in Linux is not implemented yet.");

    return;

  }

  // check paths exist

  if( !QDir(trashFilePath).exists() || !QDir(trashInfoPath).exists() ) {

    outputDebug("Could not find the right paths to send the file to the recycle bin.");

    return;

  }

  // create file for the "Trash/info" folder

  QFile infoFile(trashInfoPath + FileName.completeBaseName() + "." + FileName.completeSuffix() + ".trashinfo");     // filename+extension+.trashinfo

  infoFile.open(QIODevice::ReadWrite);

  QTextStream stream(&infoFile);

  stream << "[Trash Info]" << endl;

  stream << "Path=" + QString(QUrl::toPercentEncoding(FileName.absoluteFilePath(), "~_-./")) << endl;     // convert path to percentage encoded string

  stream << "DeletionDate=" + currentTime.toString("yyyy-MM-dd") + "T" + currentTime.toString("hh:mm:ss") << endl;      // get date and time in format YYYY-MM-DDThh:mm:ss

  infoFile.close();

  // move the original file to the "Trash/files" folder

  QDir file;

  file.rename(FileName.absoluteFilePath(), trashFilePath+FileName.completeBaseName() + "." + FileName.completeSuffix());  // rename(original path, trash path)

#else

  assert(!"Not implemented yet");

#endif

}

//------------------------------------------------------------

TString TSystemException::getMessage() const {

  wstring msg;

  switch (m_err) {

  case -1:

    msg = m_msg;

    break;  // // nothing

  case EEXIST:

    msg =

        L": Directory was not created because filename is the name of an "

        L"existing file, directory, or device";

    break;

  case ENOENT:

    msg =

        L": Path was not found, or the named file does not exist or is a null "

        L"pathname.";

    break;

  case ENOTEMPTY:

    msg =

        L": Given path is not a directory; directory is not empty; or "

        L"directory is either current working directory or root directory";

    break;

  case EACCES:

    msg =

        L": Search permission is denied by a component of the path prefix, or "

        L"write permission on the file named by path is denied, or times is "

        L"NULL, and write access is denied";

    break;

  case EFAULT:

    msg =

        L": Times is not NULL and, or points outside the process's allocated "

        L"address space.";

    break;

  case EINTR:

    msg = L": A signal was caught during the utime system call.";

    break;

  case ENAMETOOLONG:

    msg =

        L": The length of the path argument exceeds {PATH_MAX}, or the length "

        L"of a path component exceeds {NAME_MAX} while _POSIX_NO_TRUNC is in "

        L"effect.";

    break;

  case ENOTDIR:

    msg = L": A component of the path prefix is not a directory.";

    break;

  case EPERM:

    msg =

        L": The calling process does not have the super-user privilege, the "

        L"effective user ID is not the owner of the file, and times is not "

        L"NULL, or the file system containing the file is mounted read-only";

    break;

  case EROFS:

    msg =

        L": The current file system level range does not envelop the level of "

        L"the file named by path, and the calling process does not have the "

        L"super-user privilege.";

    break;

  case ENOSYS:

    msg =

        L": When the named file cannot have its time reset.  The file is on a "

        L"file system that doesn't have this operation.";

    break;

  case EMFILE:

    msg = L": The maximum number of file descriptors are currently open.";

    break;

  case ENFILE:

    msg = L": The system file table is full.";

    break;

  case EBADF:

    msg =

        L": The file descriptor determined by the DIR stream is no longer "

        L"valid.  This result occurs if the DIR stream has been closed.";

    break;

  case EINVAL:

    msg = L": 64-bit and non-64-bit calls were mixed in a sequence of calls.";

    break;

  default:

    msg = L": Unknown error";

    break;

#ifndef _WIN32

  case ELOOP:

    msg = L": Too many symbolic links were encountered in translating path.";

    break;

#ifndef MACOSX

  case EMULTIHOP:

    msg =

        L": Components of path require hopping to multiple remote machines and "

        L"the file system does not allow it.";

    break;

  case ENOLINK:

    msg =

        L": Path points to a remote machine and the link to that machine is no "

        L"longer active.";

    break;

#endif

#if defined(__sgi)

  case EDIRCORRUPTED:

    msg = L": The directory is corrupted on disk.";

    break;

#endif

  case EOVERFLOW:

    msg =

        L": One of the inode number values or offset values did not fit in 32 "

        L"bits, and the 64-bit interfaces were not used.";

    break;

#endif

  }

  return m_fname.getWideString() + L"\n" + msg;

}

//------------------------------------------------------------

void TSystem::touchFile(const TFilePath &path) {

#ifndef TNZCORE_LIGHT

  // string filename = path.getFullPath();

  if (TFileStatus(path).doesExist()) {

    int ret;

#ifdef _WIN32

    ret = _wutime(path.getWideString().c_str(), 0);

#else

    ret = utimes(::to_string(path).c_str(), 0);

#endif

    if (0 != ret) throw TSystemException(path, errno);

  } else {

    Tofstream file(path);

    if (!file) {

      throw TSystemException(path, errno);

    }

    file.close();  // altrimenti il compilatore da' un warning:

                   // variabile non utilizzata

  }

#endif

}

//------------------------------------------------------------