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#ifndef MOZC_DICTIONARY_USER_DICTIONARY_H_
#define MOZC_DICTIONARY_USER_DICTIONARY_H_

#include <string>
#include <vector>
#include "base/base.h"
#include "base/thread.h"
#include "dictionary/dictionary_interface.h"
#include "dictionary/user_pos.h"

namespace mozc {

class UserDictionaryStorage;
class UserDictionaryReloader;

class UserDictionary : public DictionaryInterface {
 public:
  UserDictionary();
  virtual ~UserDictionary();

  virtual Node *LookupPredictive(const char *str, int size,
                                 NodeAllocatorInterface *allocator) const;
  virtual Node *LookupPrefixWithLimit(
      const char *str, int size,
      const Limit &limit,
      NodeAllocatorInterface *allocator) const;
  virtual Node *LookupReverse(const char *str, int size,
                              NodeAllocatorInterface *allocator) const;

  // Load dictionary from UserDictionaryStorage.
  // mainly for unittesting
  bool Load(const UserDictionaryStorage &storage);

  bool Reload();

  // Reload synchronously.
  bool SyncReload();

  // Reload dictionary asynchronously
  bool AsyncReload();

  // Wait until reloader finishes
  void WaitForReloader();

  // Return an singleton object
  static UserDictionary *GetUserDictionary();

  // Set user dicitonary filename for unittesting
  static void SetUserDictionaryName(const string &filename);

 private:
  friend class UserDictionaryTest;

  void Clear();
  bool CheckReloaderAndDelete() const;

  vector<UserPOS::Token *> tokens_;
  mutable scoped_ptr<UserDictionaryReloader> reloader_;
  DISALLOW_COPY_AND_ASSIGN(UserDictionary);
};
}  // namespace mozc

#endif  // MOZC_DICTIONARY_USER_DICTIONARY_H_