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#ifndef MOZC_ENGINE_MINIMAL_ENGINE_H_
#define MOZC_ENGINE_MINIMAL_ENGINE_H_

#include <memory>

#include "base/port.h"
#include "engine/engine_interface.h"

namespace mozc {

// A minimal implementation of EngineInterface, which copies input key to the
// first candidate.
class MinimalEngine : public EngineInterface {
 public:
  MinimalEngine();
  ~MinimalEngine() override;

  ConverterInterface *GetConverter() const override;
  PredictorInterface *GetPredictor() const override;
  dictionary::SuppressionDictionary *GetSuppressionDictionary() override;
  bool Reload() override { return true; }
  UserDataManagerInterface *GetUserDataManager() override;
  StringPiece GetDataVersion() const override { return "0.0.0"; }
  const DataManagerInterface *GetDataManager() const override;

 private:
  std::unique_ptr<ConverterInterface> converter_;
  std::unique_ptr<PredictorInterface> predictor_;
  std::unique_ptr<dictionary::SuppressionDictionary> suppression_dictionary_;
  std::unique_ptr<UserDataManagerInterface> user_data_manager_;
  std::unique_ptr<const DataManagerInterface> data_manager_;

  DISALLOW_COPY_AND_ASSIGN(MinimalEngine);
};

}  // namespace mozc

#endif  // MOZC_ENGINE_MINIMAL_ENGINE_H_