// Copyright 2008 Dolphin Emulator Project
// Licensed under GPLv2+
// Refer to the license.txt file included.

#include <algorithm>
#include <cstddef>
#include <cstdio>
#include <cstring>
#include <fcntl.h>
#include <limits.h>
#include <string>
#include <sys/stat.h>
#include <vector>

#include "Common/Common.h"
#include "Common/CommonFuncs.h"
#include "Common/CommonPaths.h"
#include "Common/CommonTypes.h"
#include "Common/FileUtil.h"
#include "Common/Logging/Log.h"

#ifdef _WIN32
#include <windows.h>
#include <commdlg.h>  // for GetSaveFileName
#include <direct.h>   // getcwd
#include <io.h>
#include <objbase.h>  // guid stuff
#include <shellapi.h>
#else
#include <dirent.h>
#include <errno.h>
#include <libgen.h>
#include <stdlib.h>
#include <unistd.h>
#endif

#if defined(__APPLE__)
#include <CoreFoundation/CFBundle.h>
#include <CoreFoundation/CFString.h>
#include <CoreFoundation/CFURL.h>
#include <sys/param.h>
#endif

#ifndef S_ISDIR
#define S_ISDIR(m) (((m)&S_IFMT) == S_IFDIR)
#endif

// This namespace has various generic functions related to files and paths.
// The code still needs a ton of cleanup.
// REMEMBER: strdup considered harmful!
namespace File
{
// Remove any ending forward slashes from directory paths
// Modifies argument.
static void StripTailDirSlashes(std::string& fname)
{
  if (fname.length() > 1)
  {
    while (fname.back() == DIR_SEP_CHR)
      fname.pop_back();
  }
}

// Returns true if file filename exists
bool Exists(const std::string& filename)
{
  struct stat file_info;

  std::string copy(filename);
  StripTailDirSlashes(copy);

#ifdef _WIN32
  int result = _tstat64(UTF8ToTStr(copy).c_str(), &file_info);
#else
  int result = stat(copy.c_str(), &file_info);
#endif

  return (result == 0);
}

// Returns true if filename is a directory
bool IsDirectory(const std::string& filename)
{
  struct stat file_info;

  std::string copy(filename);
  StripTailDirSlashes(copy);

#ifdef _WIN32
  int result = _tstat64(UTF8ToTStr(copy).c_str(), &file_info);
#else
  int result = stat(copy.c_str(), &file_info);
#endif

  if (result < 0)
  {
    WARN_LOG(COMMON, "IsDirectory: stat failed on %s: %s", filename.c_str(),
             GetLastErrorMsg().c_str());
    return false;
  }

  return S_ISDIR(file_info.st_mode);
}

// Deletes a given filename, return true on success
// Doesn't supports deleting a directory
bool Delete(const std::string& filename)
{
  INFO_LOG(COMMON, "Delete: file %s", filename.c_str());

  // Return true because we care about the file no
  // being there, not the actual delete.
  if (!Exists(filename))
  {
    WARN_LOG(COMMON, "Delete: %s does not exist", filename.c_str());
    return true;
  }

  // We can't delete a directory
  if (IsDirectory(filename))
  {
    WARN_LOG(COMMON, "Delete failed: %s is a directory", filename.c_str());
    return false;
  }

#ifdef _WIN32
  if (!DeleteFile(UTF8ToTStr(filename).c_str()))
  {
    WARN_LOG(COMMON, "Delete: DeleteFile failed on %s: %s", filename.c_str(),
             GetLastErrorMsg().c_str());
    return false;
  }
#else
  if (unlink(filename.c_str()) == -1)
  {
    WARN_LOG(COMMON, "Delete: unlink failed on %s: %s", filename.c_str(),
             GetLastErrorMsg().c_str());
    return false;
  }
#endif

  return true;
}

// Returns true if successful, or path already exists.
bool CreateDir(const std::string& path)
{
  INFO_LOG(COMMON, "CreateDir: directory %s", path.c_str());
#ifdef _WIN32
  if (::CreateDirectory(UTF8ToTStr(path).c_str(), nullptr))
    return true;
  DWORD error = GetLastError();
  if (error == ERROR_ALREADY_EXISTS)
  {
    WARN_LOG(COMMON, "CreateDir: CreateDirectory failed on %s: already exists", path.c_str());
    return true;
  }
  ERROR_LOG(COMMON, "CreateDir: CreateDirectory failed on %s: %i", path.c_str(), error);
  return false;
#else
  if (mkdir(path.c_str(), 0755) == 0)
    return true;

  int err = errno;

  if (err == EEXIST)
  {
    WARN_LOG(COMMON, "CreateDir: mkdir failed on %s: already exists", path.c_str());
    return true;
  }

  ERROR_LOG(COMMON, "CreateDir: mkdir failed on %s: %s", path.c_str(), strerror(err));
  return false;
#endif
}

// Creates the full path of fullPath returns true on success
bool CreateFullPath(const std::string& fullPath)
{
  int panicCounter = 100;
  INFO_LOG(COMMON, "CreateFullPath: path %s", fullPath.c_str());

  if (File::Exists(fullPath))
  {
    INFO_LOG(COMMON, "CreateFullPath: path exists %s", fullPath.c_str());
    return true;
  }

  size_t position = 0;
  while (true)
  {
    // Find next sub path
    position = fullPath.find(DIR_SEP_CHR, position);

    // we're done, yay!
    if (position == fullPath.npos)
      return true;

    // Include the '/' so the first call is CreateDir("/") rather than CreateDir("")
    std::string const subPath(fullPath.substr(0, position + 1));
    if (!File::IsDirectory(subPath))
      File::CreateDir(subPath);

    // A safety check
    panicCounter--;
    if (panicCounter <= 0)
    {
      ERROR_LOG(COMMON, "CreateFullPath: directory structure is too deep");
      return false;
    }
    position++;
  }
}

// Deletes a directory filename, returns true on success
bool DeleteDir(const std::string& filename)
{
  INFO_LOG(COMMON, "DeleteDir: directory %s", filename.c_str());

  // check if a directory
  if (!File::IsDirectory(filename))
  {
    ERROR_LOG(COMMON, "DeleteDir: Not a directory %s", filename.c_str());
    return false;
  }

#ifdef _WIN32
  if (::RemoveDirectory(UTF8ToTStr(filename).c_str()))
    return true;
#else
  if (rmdir(filename.c_str()) == 0)
    return true;
#endif
  ERROR_LOG(COMMON, "DeleteDir: %s: %s", filename.c_str(), GetLastErrorMsg().c_str());

  return false;
}

// renames file srcFilename to destFilename, returns true on success
bool Rename(const std::string& srcFilename, const std::string& destFilename)
{
  INFO_LOG(COMMON, "Rename: %s --> %s", srcFilename.c_str(), destFilename.c_str());
#ifdef _WIN32
  auto sf = UTF8ToTStr(srcFilename);
  auto df = UTF8ToTStr(destFilename);
  // The Internet seems torn about whether ReplaceFile is atomic or not.
  // Hopefully it's atomic enough...
  if (ReplaceFile(df.c_str(), sf.c_str(), nullptr, REPLACEFILE_IGNORE_MERGE_ERRORS, nullptr,
                  nullptr))
    return true;
  // Might have failed because the destination doesn't exist.
  if (GetLastError() == ERROR_FILE_NOT_FOUND)
  {
    if (MoveFile(sf.c_str(), df.c_str()))
      return true;
  }
#else
  if (rename(srcFilename.c_str(), destFilename.c_str()) == 0)
    return true;
#endif
  ERROR_LOG(COMMON, "Rename: failed %s --> %s: %s", srcFilename.c_str(), destFilename.c_str(),
            GetLastErrorMsg().c_str());
  return false;
}

#ifndef _WIN32
static void FSyncPath(const char* path)
{
  int fd = open(path, O_RDONLY);
  if (fd != -1)
  {
    fsync(fd);
    close(fd);
  }
}
#endif

bool RenameSync(const std::string& srcFilename, const std::string& destFilename)
{
  if (!Rename(srcFilename, destFilename))
    return false;
#ifdef _WIN32
  int fd = _topen(UTF8ToTStr(srcFilename).c_str(), _O_RDONLY);
  if (fd != -1)
  {
    _commit(fd);
    close(fd);
  }
#else
  char* path = strdup(srcFilename.c_str());
  FSyncPath(path);
  FSyncPath(dirname(path));
  free(path);
  path = strdup(destFilename.c_str());
  FSyncPath(dirname(path));
  free(path);
#endif
  return true;
}

// copies file srcFilename to destFilename, returns true on success
bool Copy(const std::string& srcFilename, const std::string& destFilename)
{
  INFO_LOG(COMMON, "Copy: %s --> %s", srcFilename.c_str(), destFilename.c_str());
#ifdef _WIN32
  if (CopyFile(UTF8ToTStr(srcFilename).c_str(), UTF8ToTStr(destFilename).c_str(), FALSE))
    return true;

  ERROR_LOG(COMMON, "Copy: failed %s --> %s: %s", srcFilename.c_str(), destFilename.c_str(),
            GetLastErrorMsg().c_str());
  return false;
#else

// buffer size
#define BSIZE 1024

  char buffer[BSIZE];

  // Open input file
  std::ifstream input;
  OpenFStream(input, srcFilename, std::ifstream::in | std::ifstream::binary);
  if (!input.is_open())
  {
    ERROR_LOG(COMMON, "Copy: input failed %s --> %s: %s", srcFilename.c_str(), destFilename.c_str(),
              GetLastErrorMsg().c_str());
    return false;
  }

  // open output file
  File::IOFile output(destFilename, "wb");

  if (!output.IsOpen())
  {
    ERROR_LOG(COMMON, "Copy: output failed %s --> %s: %s", srcFilename.c_str(),
              destFilename.c_str(), GetLastErrorMsg().c_str());
    return false;
  }

  // copy loop
  while (!input.eof())
  {
    // read input
    input.read(buffer, BSIZE);
    if (!input)
    {
      ERROR_LOG(COMMON, "Copy: failed reading from source, %s --> %s: %s", srcFilename.c_str(),
                destFilename.c_str(), GetLastErrorMsg().c_str());
      return false;
    }

    // write output
    if (!output.WriteBytes(buffer, BSIZE))
    {
      ERROR_LOG(COMMON, "Copy: failed writing to output, %s --> %s: %s", srcFilename.c_str(),
                destFilename.c_str(), GetLastErrorMsg().c_str());
      return false;
    }
  }

  return true;
#endif
}

// Returns the size of filename (64bit)
u64 GetSize(const std::string& filename)
{
  if (!Exists(filename))
  {
    WARN_LOG(COMMON, "GetSize: failed %s: No such file", filename.c_str());
    return 0;
  }

  if (IsDirectory(filename))
  {
    WARN_LOG(COMMON, "GetSize: failed %s: is a directory", filename.c_str());
    return 0;
  }

  struct stat buf;
#ifdef _WIN32
  if (_tstat64(UTF8ToTStr(filename).c_str(), &buf) == 0)
#else
  if (stat(filename.c_str(), &buf) == 0)
#endif
  {
    DEBUG_LOG(COMMON, "GetSize: %s: %lld", filename.c_str(), (long long)buf.st_size);
    return buf.st_size;
  }

  ERROR_LOG(COMMON, "GetSize: Stat failed %s: %s", filename.c_str(), GetLastErrorMsg().c_str());
  return 0;
}

// Overloaded GetSize, accepts file descriptor
u64 GetSize(const int fd)
{
  struct stat buf;
  if (fstat(fd, &buf) != 0)
  {
    ERROR_LOG(COMMON, "GetSize: stat failed %i: %s", fd, GetLastErrorMsg().c_str());
    return 0;
  }
  return buf.st_size;
}

// Overloaded GetSize, accepts FILE*
u64 GetSize(FILE* f)
{
  // can't use off_t here because it can be 32-bit
  u64 pos = ftello(f);
  if (fseeko(f, 0, SEEK_END) != 0)
  {
    ERROR_LOG(COMMON, "GetSize: seek failed %p: %s", f, GetLastErrorMsg().c_str());
    return 0;
  }

  u64 size = ftello(f);
  if ((size != pos) && (fseeko(f, pos, SEEK_SET) != 0))
  {
    ERROR_LOG(COMMON, "GetSize: seek failed %p: %s", f, GetLastErrorMsg().c_str());
    return 0;
  }

  return size;
}

// creates an empty file filename, returns true on success
bool CreateEmptyFile(const std::string& filename)
{
  INFO_LOG(COMMON, "CreateEmptyFile: %s", filename.c_str());

  if (!File::IOFile(filename, "wb"))
  {
    ERROR_LOG(COMMON, "CreateEmptyFile: failed %s: %s", filename.c_str(),
              GetLastErrorMsg().c_str());
    return false;
  }

  return true;
}

// Recursive or non-recursive list of files and directories under directory.
FSTEntry ScanDirectoryTree(const std::string& directory, bool recursive)
{
  INFO_LOG(COMMON, "ScanDirectoryTree: directory %s", directory.c_str());
  FSTEntry parent_entry;
  parent_entry.physicalName = directory;
  parent_entry.isDirectory = true;
  parent_entry.size = 0;
#ifdef _WIN32
  // Find the first file in the directory.
  WIN32_FIND_DATA ffd;

  HANDLE hFind = FindFirstFile(UTF8ToTStr(directory + "\\*").c_str(), &ffd);
  if (hFind == INVALID_HANDLE_VALUE)
  {
    FindClose(hFind);
    return parent_entry;
  }
  // Windows loop
  do
  {
    const std::string virtual_name(TStrToUTF8(ffd.cFileName));
#else
  DIR* dirp = opendir(directory.c_str());
  if (!dirp)
    return parent_entry;

  // non Windows loop
  while (dirent* result = readdir(dirp))
  {
    const std::string virtual_name(result->d_name);
#endif
    if (virtual_name == "." || virtual_name == "..")
      continue;
    auto physical_name = directory + DIR_SEP + virtual_name;
    FSTEntry entry;
    entry.isDirectory = IsDirectory(physical_name);
    if (entry.isDirectory)
    {
      if (recursive)
        entry = ScanDirectoryTree(physical_name, true);
      else
        entry.size = 0;
      parent_entry.size += entry.size;
    }
    else
    {
      entry.size = GetSize(physical_name);
    }
    entry.virtualName = virtual_name;
    entry.physicalName = physical_name;

    ++parent_entry.size;
    // Push into the tree
    parent_entry.children.push_back(entry);
#ifdef _WIN32
  } while (FindNextFile(hFind, &ffd) != 0);
  FindClose(hFind);
#else
  }
  closedir(dirp);
#endif

  return parent_entry;
}

// Deletes the given directory and anything under it. Returns true on success.
bool DeleteDirRecursively(const std::string& directory)
{
  INFO_LOG(COMMON, "DeleteDirRecursively: %s", directory.c_str());
  bool success = true;

#ifdef _WIN32
  // Find the first file in the directory.
  WIN32_FIND_DATA ffd;
  HANDLE hFind = FindFirstFile(UTF8ToTStr(directory + "\\*").c_str(), &ffd);

  if (hFind == INVALID_HANDLE_VALUE)
  {
    FindClose(hFind);
    return false;
  }

  // Windows loop
  do
  {
    const std::string virtualName(TStrToUTF8(ffd.cFileName));
#else
  DIR* dirp = opendir(directory.c_str());
  if (!dirp)
    return false;

  // non Windows loop
  while (dirent* result = readdir(dirp))
  {
    const std::string virtualName = result->d_name;
#endif

    // check for "." and ".."
    if (((virtualName[0] == '.') && (virtualName[1] == '\0')) ||
        ((virtualName[0] == '.') && (virtualName[1] == '.') && (virtualName[2] == '\0')))
      continue;

    std::string newPath = directory + DIR_SEP_CHR + virtualName;
    if (IsDirectory(newPath))
    {
      if (!DeleteDirRecursively(newPath))
      {
        success = false;
        break;
      }
    }
    else
    {
      if (!File::Delete(newPath))
      {
        success = false;
        break;
      }
    }

#ifdef _WIN32
  } while (FindNextFile(hFind, &ffd) != 0);
  FindClose(hFind);
#else
  }
  closedir(dirp);
#endif
  if (success)
    File::DeleteDir(directory);

  return success;
}

// Create directory and copy contents (does not overwrite existing files)
void CopyDir(const std::string& source_path, const std::string& dest_path)
{
  if (source_path == dest_path)
    return;
  if (!File::Exists(source_path))
    return;
  if (!File::Exists(dest_path))
    File::CreateFullPath(dest_path);

#ifdef _WIN32
  WIN32_FIND_DATA ffd;
  HANDLE hFind = FindFirstFile(UTF8ToTStr(source_path + "\\*").c_str(), &ffd);

  if (hFind == INVALID_HANDLE_VALUE)
  {
    FindClose(hFind);
    return;
  }

  do
  {
    const std::string virtualName(TStrToUTF8(ffd.cFileName));
#else
  DIR* dirp = opendir(source_path.c_str());
  if (!dirp)
    return;

  while (dirent* result = readdir(dirp))
  {
    const std::string virtualName(result->d_name);
#endif
    // check for "." and ".."
    if (virtualName == "." || virtualName == "..")
      continue;

    std::string source = source_path + DIR_SEP + virtualName;
    std::string dest = dest_path + DIR_SEP + virtualName;
    if (IsDirectory(source))
    {
      if (!File::Exists(dest))
        File::CreateFullPath(dest + DIR_SEP);
      CopyDir(source, dest);
    }
    else if (!File::Exists(dest))
      File::Copy(source, dest);
#ifdef _WIN32
  } while (FindNextFile(hFind, &ffd) != 0);
  FindClose(hFind);
#else
  }
  closedir(dirp);
#endif
}

// Returns the current directory
std::string GetCurrentDir()
{
  char* dir;
  // Get the current working directory (getcwd uses malloc)
  if (!(dir = __getcwd(nullptr, 0)))
  {
    ERROR_LOG(COMMON, "GetCurrentDirectory failed: %s", GetLastErrorMsg().c_str());
    return nullptr;
  }
  std::string strDir = dir;
  free(dir);
  return strDir;
}

// Sets the current directory to the given directory
bool SetCurrentDir(const std::string& directory)
{
  return __chdir(directory.c_str()) == 0;
}

std::string CreateTempDir()
{
#ifdef _WIN32
  TCHAR temp[MAX_PATH];
  if (!GetTempPath(MAX_PATH, temp))
    return "";

  GUID guid;
  CoCreateGuid(&guid);
  TCHAR tguid[40];
  StringFromGUID2(guid, tguid, 39);
  tguid[39] = 0;
  std::string dir = TStrToUTF8(temp) + "/" + TStrToUTF8(tguid);
  if (!CreateDir(dir))
    return "";
  dir = ReplaceAll(dir, "\\", DIR_SEP);
  return dir;
#else
  const char* base = getenv("TMPDIR") ?: "/tmp";
  std::string path = std::string(base) + "/DolphinWii.XXXXXX";
  if (!mkdtemp(&path[0]))
    return "";
  return path;
#endif
}

std::string GetTempFilenameForAtomicWrite(const std::string& path)
{
  std::string abs = path;
#ifdef _WIN32
  TCHAR absbuf[MAX_PATH];
  if (_tfullpath(absbuf, UTF8ToTStr(path).c_str(), MAX_PATH) != nullptr)
    abs = TStrToUTF8(absbuf);
#else
  char absbuf[PATH_MAX];
  if (realpath(path.c_str(), absbuf) != nullptr)
    abs = absbuf;
#endif
  return abs + ".xxx";
}

#if defined(__APPLE__)
std::string GetBundleDirectory()
{
  CFURLRef BundleRef;
  char AppBundlePath[MAXPATHLEN];
  // Get the main bundle for the app
  BundleRef = CFBundleCopyBundleURL(CFBundleGetMainBundle());
  CFStringRef BundlePath = CFURLCopyFileSystemPath(BundleRef, kCFURLPOSIXPathStyle);
  CFStringGetFileSystemRepresentation(BundlePath, AppBundlePath, sizeof(AppBundlePath));
  CFRelease(BundleRef);
  CFRelease(BundlePath);

  return AppBundlePath;
}
#endif

std::string& GetExeDirectory()
{
  static std::string DolphinPath;
  if (DolphinPath.empty())
  {
#ifdef _WIN32
    TCHAR Dolphin_exe_Path[2048];
    TCHAR Dolphin_exe_Clean_Path[MAX_PATH];
    GetModuleFileName(nullptr, Dolphin_exe_Path, 2048);
    if (_tfullpath(Dolphin_exe_Clean_Path, Dolphin_exe_Path, MAX_PATH) != nullptr)
      DolphinPath = TStrToUTF8(Dolphin_exe_Clean_Path);
    else
      DolphinPath = TStrToUTF8(Dolphin_exe_Path);
    DolphinPath = DolphinPath.substr(0, DolphinPath.find_last_of('\\'));
#else
    char Dolphin_exe_Path[PATH_MAX];
    ssize_t len = ::readlink("/proc/self/exe", Dolphin_exe_Path, sizeof(Dolphin_exe_Path));
    if (len == -1 || len == sizeof(Dolphin_exe_Path))
    {
      len = 0;
    }
    Dolphin_exe_Path[len] = '\0';
    DolphinPath = Dolphin_exe_Path;
    DolphinPath = DolphinPath.substr(0, DolphinPath.rfind('/'));
#endif
  }
  return DolphinPath;
}

std::string GetSysDirectory()
{
  std::string sysDir;

#if defined(__APPLE__)
  sysDir = GetBundleDirectory() + DIR_SEP + SYSDATA_DIR;
#elif defined(_WIN32) || defined(LINUX_LOCAL_DEV)
  sysDir = GetExeDirectory() + DIR_SEP + SYSDATA_DIR;
#else
  sysDir = SYSDATA_DIR;
#endif
  sysDir += DIR_SEP;

  INFO_LOG(COMMON, "GetSysDirectory: Setting to %s:", sysDir.c_str());
  return sysDir;
}

static std::string s_user_paths[NUM_PATH_INDICES];
static void RebuildUserDirectories(unsigned int dir_index)
{
  switch (dir_index)
  {
  case D_USER_IDX:
    s_user_paths[D_GCUSER_IDX] = s_user_paths[D_USER_IDX] + GC_USER_DIR DIR_SEP;
    s_user_paths[D_WIIROOT_IDX] = s_user_paths[D_USER_IDX] + WII_USER_DIR;
    s_user_paths[D_CONFIG_IDX] = s_user_paths[D_USER_IDX] + CONFIG_DIR DIR_SEP;
    s_user_paths[D_GAMESETTINGS_IDX] = s_user_paths[D_USER_IDX] + GAMESETTINGS_DIR DIR_SEP;
    s_user_paths[D_MAPS_IDX] = s_user_paths[D_USER_IDX] + MAPS_DIR DIR_SEP;
    s_user_paths[D_CACHE_IDX] = s_user_paths[D_USER_IDX] + CACHE_DIR DIR_SEP;
    s_user_paths[D_SHADERCACHE_IDX] = s_user_paths[D_CACHE_IDX] + SHADERCACHE_DIR DIR_SEP;
    s_user_paths[D_SHADERS_IDX] = s_user_paths[D_USER_IDX] + SHADERS_DIR DIR_SEP;
    s_user_paths[D_STATESAVES_IDX] = s_user_paths[D_USER_IDX] + STATESAVES_DIR DIR_SEP;
    s_user_paths[D_SCREENSHOTS_IDX] = s_user_paths[D_USER_IDX] + SCREENSHOTS_DIR DIR_SEP;
    s_user_paths[D_LOAD_IDX] = s_user_paths[D_USER_IDX] + LOAD_DIR DIR_SEP;
    s_user_paths[D_HIRESTEXTURES_IDX] = s_user_paths[D_LOAD_IDX] + HIRES_TEXTURES_DIR DIR_SEP;
    s_user_paths[D_DUMP_IDX] = s_user_paths[D_USER_IDX] + DUMP_DIR DIR_SEP;
    s_user_paths[D_DUMPFRAMES_IDX] = s_user_paths[D_DUMP_IDX] + DUMP_FRAMES_DIR DIR_SEP;
    s_user_paths[D_DUMPAUDIO_IDX] = s_user_paths[D_DUMP_IDX] + DUMP_AUDIO_DIR DIR_SEP;
    s_user_paths[D_DUMPTEXTURES_IDX] = s_user_paths[D_DUMP_IDX] + DUMP_TEXTURES_DIR DIR_SEP;
    s_user_paths[D_DUMPDSP_IDX] = s_user_paths[D_DUMP_IDX] + DUMP_DSP_DIR DIR_SEP;
    s_user_paths[D_DUMPSSL_IDX] = s_user_paths[D_DUMP_IDX] + DUMP_SSL_DIR DIR_SEP;
    s_user_paths[D_LOGS_IDX] = s_user_paths[D_USER_IDX] + LOGS_DIR DIR_SEP;
    s_user_paths[D_MAILLOGS_IDX] = s_user_paths[D_LOGS_IDX] + MAIL_LOGS_DIR DIR_SEP;
    s_user_paths[D_THEMES_IDX] = s_user_paths[D_USER_IDX] + THEMES_DIR DIR_SEP;
    s_user_paths[D_PIPES_IDX] = s_user_paths[D_USER_IDX] + PIPES_DIR DIR_SEP;
    s_user_paths[D_WFSROOT_IDX] = s_user_paths[D_USER_IDX] + WFSROOT_DIR DIR_SEP;
    s_user_paths[D_BACKUP_IDX] = s_user_paths[D_USER_IDX] + BACKUP_DIR DIR_SEP;
    s_user_paths[F_DOLPHINCONFIG_IDX] = s_user_paths[D_CONFIG_IDX] + DOLPHIN_CONFIG;
    s_user_paths[F_DEBUGGERCONFIG_IDX] = s_user_paths[D_CONFIG_IDX] + DEBUGGER_CONFIG;
    s_user_paths[F_LOGGERCONFIG_IDX] = s_user_paths[D_CONFIG_IDX] + LOGGER_CONFIG;
    s_user_paths[F_MAINLOG_IDX] = s_user_paths[D_LOGS_IDX] + MAIN_LOG;
    s_user_paths[F_RAMDUMP_IDX] = s_user_paths[D_DUMP_IDX] + RAM_DUMP;
    s_user_paths[F_ARAMDUMP_IDX] = s_user_paths[D_DUMP_IDX] + ARAM_DUMP;
    s_user_paths[F_FAKEVMEMDUMP_IDX] = s_user_paths[D_DUMP_IDX] + FAKEVMEM_DUMP;
    s_user_paths[F_GCSRAM_IDX] = s_user_paths[D_GCUSER_IDX] + GC_SRAM;
    s_user_paths[F_WIISDCARD_IDX] = s_user_paths[D_WIIROOT_IDX] + DIR_SEP WII_SDCARD;

    s_user_paths[D_MEMORYWATCHER_IDX] = s_user_paths[D_USER_IDX] + MEMORYWATCHER_DIR DIR_SEP;
    s_user_paths[F_MEMORYWATCHERLOCATIONS_IDX] =
        s_user_paths[D_MEMORYWATCHER_IDX] + MEMORYWATCHER_LOCATIONS;
    s_user_paths[F_MEMORYWATCHERSOCKET_IDX] =
        s_user_paths[D_MEMORYWATCHER_IDX] + MEMORYWATCHER_SOCKET;

    // The shader cache has moved to the cache directory, so remove the old one.
    // TODO: remove that someday.
    File::DeleteDirRecursively(s_user_paths[D_USER_IDX] + SHADERCACHE_LEGACY_DIR DIR_SEP);
    break;

  case D_CONFIG_IDX:
    s_user_paths[F_DOLPHINCONFIG_IDX] = s_user_paths[D_CONFIG_IDX] + DOLPHIN_CONFIG;
    s_user_paths[F_DEBUGGERCONFIG_IDX] = s_user_paths[D_CONFIG_IDX] + DEBUGGER_CONFIG;
    s_user_paths[F_LOGGERCONFIG_IDX] = s_user_paths[D_CONFIG_IDX] + LOGGER_CONFIG;
    break;

  case D_CACHE_IDX:
    s_user_paths[D_SHADERCACHE_IDX] = s_user_paths[D_CACHE_IDX] + SHADERCACHE_DIR DIR_SEP;
    break;

  case D_GCUSER_IDX:
    s_user_paths[F_GCSRAM_IDX] = s_user_paths[D_GCUSER_IDX] + GC_SRAM;
    break;

  case D_DUMP_IDX:
    s_user_paths[D_DUMPFRAMES_IDX] = s_user_paths[D_DUMP_IDX] + DUMP_FRAMES_DIR DIR_SEP;
    s_user_paths[D_DUMPAUDIO_IDX] = s_user_paths[D_DUMP_IDX] + DUMP_AUDIO_DIR DIR_SEP;
    s_user_paths[D_DUMPTEXTURES_IDX] = s_user_paths[D_DUMP_IDX] + DUMP_TEXTURES_DIR DIR_SEP;
    s_user_paths[D_DUMPDSP_IDX] = s_user_paths[D_DUMP_IDX] + DUMP_DSP_DIR DIR_SEP;
    s_user_paths[D_DUMPSSL_IDX] = s_user_paths[D_DUMP_IDX] + DUMP_SSL_DIR DIR_SEP;
    s_user_paths[F_RAMDUMP_IDX] = s_user_paths[D_DUMP_IDX] + RAM_DUMP;
    s_user_paths[F_ARAMDUMP_IDX] = s_user_paths[D_DUMP_IDX] + ARAM_DUMP;
    s_user_paths[F_FAKEVMEMDUMP_IDX] = s_user_paths[D_DUMP_IDX] + FAKEVMEM_DUMP;
    break;

  case D_LOGS_IDX:
    s_user_paths[D_MAILLOGS_IDX] = s_user_paths[D_LOGS_IDX] + MAIL_LOGS_DIR DIR_SEP;
    s_user_paths[F_MAINLOG_IDX] = s_user_paths[D_LOGS_IDX] + MAIN_LOG;
    break;

  case D_LOAD_IDX:
    s_user_paths[D_HIRESTEXTURES_IDX] = s_user_paths[D_LOAD_IDX] + HIRES_TEXTURES_DIR DIR_SEP;
    break;
  }
}

// Gets a set user directory path
// Don't call prior to setting the base user directory
const std::string& GetUserPath(unsigned int dir_index)
{
  return s_user_paths[dir_index];
}

// Sets a user directory path
// Rebuilds internal directory structure to compensate for the new directory
void SetUserPath(unsigned int dir_index, const std::string& path)
{
  if (path.empty())
    return;

  s_user_paths[dir_index] = path;
  RebuildUserDirectories(dir_index);
}

std::string GetThemeDir(const std::string& theme_name)
{
  std::string dir = File::GetUserPath(D_THEMES_IDX) + theme_name + "/";
  if (File::Exists(dir))
    return dir;

  // If the theme doesn't exist in the user dir, load from shared directory
  dir = GetSysDirectory() + THEMES_DIR "/" + theme_name + "/";
  if (File::Exists(dir))
    return dir;

  // If the theme doesn't exist at all, load the default theme
  return GetSysDirectory() + THEMES_DIR "/" DEFAULT_THEME_DIR "/";
}

bool WriteStringToFile(const std::string& str, const std::string& filename)
{
  return File::IOFile(filename, "wb").WriteBytes(str.data(), str.size());
}

bool ReadFileToString(const std::string& filename, std::string& str)
{
  File::IOFile file(filename, "rb");
  auto const f = file.GetHandle();

  if (!f)
    return false;

  size_t read_size;
  str.resize(GetSize(f));
  bool retval = file.ReadArray(&str[0], str.size(), &read_size);

  return retval;
}

IOFile::IOFile() : m_file(nullptr), m_good(true)
{
}

IOFile::IOFile(std::FILE* file) : m_file(file), m_good(true)
{
}

IOFile::IOFile(const std::string& filename, const char openmode[]) : m_file(nullptr), m_good(true)
{
  Open(filename, openmode);
}

IOFile::~IOFile()
{
  Close();
}

IOFile::IOFile(IOFile&& other) noexcept : m_file(nullptr), m_good(true)
{
  Swap(other);
}

IOFile& IOFile::operator=(IOFile&& other) noexcept
{
  Swap(other);
  return *this;
}

void IOFile::Swap(IOFile& other) noexcept
{
  std::swap(m_file, other.m_file);
  std::swap(m_good, other.m_good);
}

bool IOFile::Open(const std::string& filename, const char openmode[])
{
  Close();
#ifdef _WIN32
  _tfopen_s(&m_file, UTF8ToTStr(filename).c_str(), UTF8ToTStr(openmode).c_str());
#else
  m_file = fopen(filename.c_str(), openmode);
#endif

  m_good = IsOpen();
  return m_good;
}

bool IOFile::Close()
{
  if (!IsOpen() || 0 != std::fclose(m_file))
    m_good = false;

  m_file = nullptr;
  return m_good;
}

void IOFile::SetHandle(std::FILE* file)
{
  Close();
  Clear();
  m_file = file;
}

u64 IOFile::GetSize()
{
  if (IsOpen())
    return File::GetSize(m_file);
  else
    return 0;
}

bool IOFile::Seek(s64 off, int origin)
{
  if (!IsOpen() || 0 != fseeko(m_file, off, origin))
    m_good = false;

  return m_good;
}

u64 IOFile::Tell() const
{
  if (IsOpen())
    return ftello(m_file);
  else
    return -1;
}

bool IOFile::Flush()
{
  if (!IsOpen() || 0 != std::fflush(m_file))
    m_good = false;

  return m_good;
}

bool IOFile::Resize(u64 size)
{
  if (!IsOpen() ||
      0 !=
#ifdef _WIN32
          // ector: _chsize sucks, not 64-bit safe
          // F|RES: changed to _chsize_s. i think it is 64-bit safe
          _chsize_s(_fileno(m_file), size)
#else
          // TODO: handle 64bit and growing
          ftruncate(fileno(m_file), size)
#endif
          )
    m_good = false;

  return m_good;
}

}  // namespace