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#include "base/pepper_file_system_mock.h"

#include <map>
#include <string>

#include "base/mmap.h"
#include "base/mutex.h"

namespace mozc {

PepperFileSystemMock::PepperFileSystemMock() {
}

PepperFileSystemMock::~PepperFileSystemMock() {
}

bool PepperFileSystemMock::Open(pp::Instance *instance, int64 expected_size) {
  scoped_lock l(&mutex_);
  return true;
}

bool PepperFileSystemMock::FileExists(const string &filename) {
  scoped_lock l(&mutex_);
  return file_storage_.find(filename) != file_storage_.end();
}

bool PepperFileSystemMock::DirectoryExists(const string &dirname) {
  scoped_lock l(&mutex_);
  // Currently we don't use directory in NaCl Mozc.
  return false;
}

bool PepperFileSystemMock::ReadBinaryFile(const string &filename,
                                          string *buffer) {
  scoped_lock l(&mutex_);
  map<string, string>::const_iterator it = file_storage_.find(filename);
  if (it == file_storage_.end()) {
    return false;
  }
  *buffer = it->second;
  return true;
}

bool PepperFileSystemMock::WriteBinaryFile(const string &filename,
                                           const string &buffer) {
  scoped_lock l(&mutex_);
  file_storage_[filename] = buffer;
  return true;
}

bool PepperFileSystemMock::DeleteFile(const string &filename) {
  scoped_lock l(&mutex_);
  return file_storage_.erase(filename);
}

bool PepperFileSystemMock::RenameFile(const string &from, const string &to) {
  scoped_lock l(&mutex_);
  map<string, string>::iterator it = file_storage_.find(from);
  if (it == file_storage_.end()) {
    return false;
  }
  file_storage_[to] = it->second;
  file_storage_.erase(from);
  return true;
}

bool PepperFileSystemMock::RegisterMmap(Mmap *mmap) {
  scoped_lock l(&mutex_);
  return mmap_set_.insert(mmap).second;
}

bool PepperFileSystemMock::UnRegisterMmap(Mmap *mmap) {
  scoped_lock l(&mutex_);
  return mmap_set_.erase(mmap);
}

bool PepperFileSystemMock::SyncMmapToFile() {
  scoped_lock l(&mutex_);
  for (set<Mmap*>::iterator it = mmap_set_.begin();
       it != mmap_set_.end(); ++it) {
    (*it)->SyncToFile();
  }
  return true;
}

}  // namespace mozc