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#ifndef MOZC_ENGINE_ENGINE_H_
#define MOZC_ENGINE_ENGINE_H_

#include "base/port.h"
#include "base/scoped_ptr.h"
#include "dictionary/pos_group.h"
#include "dictionary/user_dictionary.h"
#include "engine/engine_interface.h"

namespace mozc {

class Connector;
class ConverterInterface;
class DataManagerInterface;
class DictionaryInterface;
class ImmutableConverterInterface;
class PredictorInterface;
class RewriterInterface;
class SegmenterInterface;
class SuggestionFilter;
class UserDataManagerInterface;

// Builds and manages a set of modules that are necessary for conversion engine.
class Engine : public EngineInterface {
 public:
  Engine();
  virtual ~Engine();

  // Initializes the object by given a data manager (providing embedded data
  // set) and predictor factory function.
  // Predictor factory is used to select DefaultPredictor and MobilePredictor.
  void Init(const DataManagerInterface *data_manager,
            PredictorInterface *(*predictor_factory)(PredictorInterface *,
                                                     PredictorInterface *),
            bool enable_content_word_learning);

  virtual ConverterInterface *GetConverter() const { return converter_.get(); }
  virtual PredictorInterface *GetPredictor() const { return predictor_; }
  virtual dictionary::SuppressionDictionary *GetSuppressionDictionary() {
    return suppression_dictionary_.get();
  }

  virtual bool Reload();

  virtual UserDataManagerInterface *GetUserDataManager() {
    return user_data_manager_.get();
  }

 private:
  scoped_ptr<dictionary::SuppressionDictionary> suppression_dictionary_;
  scoped_ptr<const Connector> connector_;
  scoped_ptr<const SegmenterInterface> segmenter_;
  scoped_ptr<dictionary::UserDictionary> user_dictionary_;
  scoped_ptr<DictionaryInterface> suffix_dictionary_;
  scoped_ptr<DictionaryInterface> dictionary_;
  scoped_ptr<const PosGroup> pos_group_;
  scoped_ptr<ImmutableConverterInterface> immutable_converter_;
  scoped_ptr<const SuggestionFilter> suggestion_filter_;

  // TODO(noriyukit): Currently predictor and rewriter are created by this class
  // but owned by converter_. Since this class creates these two, it'd be better
  // if Engine class owns these two instances.
  PredictorInterface *predictor_;
  RewriterInterface *rewriter_;

  scoped_ptr<ConverterInterface> converter_;
  scoped_ptr<UserDataManagerInterface> user_data_manager_;

  DISALLOW_COPY_AND_ASSIGN(Engine);
};

}  // namespace mozc

#endif  // MOZC_ENGINE_ENGINE_H_