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// Handwriting module manager class

#include <set>

#include "base/logging.h"
#include "base/singleton.h"
#include "handwriting/handwriting_manager.h"

namespace mozc {
namespace handwriting {

class HandwritingManagerImpl {
 public:
  HandwritingManagerImpl() : module_(NULL) {}
  virtual ~HandwritingManagerImpl() {}

  void SetHandwritingModule(HandwritingInterface *module) {
    module_ = module;
  }

  HandwritingStatus Recognize(const Strokes &strokes,
                              vector<string> *candidates) const {
    DCHECK(module_);
    DCHECK(candidates);
    candidates->clear();
    return module_->Recognize(strokes, candidates);
  }

  HandwritingStatus Commit(const Strokes &strokes, const string &result) {
    DCHECK(module_);
    return module_->Commit(strokes, result);
  }

 private:
  HandwritingInterface * module_;
};

// static
void HandwritingManager::SetHandwritingModule(HandwritingInterface *module) {
  Singleton<HandwritingManagerImpl>::get()->SetHandwritingModule(module);
}

// static
HandwritingStatus HandwritingManager::Recognize(const Strokes &strokes,
                                                vector<string> *candidates) {
  return Singleton<HandwritingManagerImpl>::get()->Recognize(strokes,
                                                             candidates);
}

// static
HandwritingStatus HandwritingManager::Commit(const Strokes &strokes,
                                const string &result) {
  return Singleton<HandwritingManagerImpl>::get()->Commit(strokes, result);
}

}  // namespace handwriting
}  // namespace mozc