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#include "sync/sync_util.h"

#include <stdlib.h>

#ifdef OS_WINDOWS
#include <windows.h>
#endif

#include "base/base.h"
#include "base/util.h"

namespace mozc {
namespace sync {

string SyncUtil::GenRandomString(int size) {
  string result;
  for (int i = 0; i < size; ++i) {
    const char32 l = Util::Random(static_cast<int>('z' - 'a')) + 'a';
    Util::UCS4ToUTF8Append(l, &result);
  }
  return result;
}

bool SyncUtil::CopyLastSyncedFile(const string &current,
                                  const string &prev) {
  if (!Util::CopyFile(current, prev)) {
    LOG(ERROR) << "cannot copy " << current << " prev " << prev;
    return false;
  }

#ifdef OS_WINDOWS
  // make the file |prev| 'system hidden'.
  wstring wfilename;
  Util::UTF8ToWide(prev.c_str(), &wfilename);
  if (!::SetFileAttributes(wfilename.c_str(),
                           FILE_ATTRIBUTE_HIDDEN |
                           FILE_ATTRIBUTE_SYSTEM)) {
    LOG(ERROR) << "Cannot make hidden: " << prev
               << " " << ::GetLastError();
  }
#endif

  return true;
}
}  // sync
}  // mozc