#pragma once
#include <string>
#include "StatelessFeatureFunction.h"
#include "moses/Word.h"

namespace Moses
{

// -inf if left-most or right-most non-term is over a set span
class MaxSpanFreeNonTermSource : public StatelessFeatureFunction
{
public:
  MaxSpanFreeNonTermSource(const std::string &line);

  virtual bool IsUseable(const FactorMask &mask) const {
    return true;
  }

  virtual void EvaluateInIsolation(const Phrase &source
                                   , const TargetPhrase &targetPhrase
                                   , ScoreComponentCollection &scoreBreakdown
                                   , ScoreComponentCollection &estimatedScores) const;

  virtual void EvaluateWithSourceContext(const InputType &input
                                         , const InputPath &inputPath
                                         , const TargetPhrase &targetPhrase
                                         , const StackVec *stackVec
                                         , ScoreComponentCollection &scoreBreakdown
                                         , ScoreComponentCollection *estimatedScores = NULL) const;

  void EvaluateTranslationOptionListWithSourceContext(const InputType &input
      , const TranslationOptionList &translationOptionList) const {
  }

  virtual void EvaluateWhenApplied(const Hypothesis& hypo,
                                   ScoreComponentCollection* accumulator) const {
  }

  virtual void EvaluateWhenApplied(const ChartHypothesis &hypo,
                                   ScoreComponentCollection* accumulator) const {
  }

  void SetParameter(const std::string& key, const std::string& value);
  std::vector<float> DefaultWeights() const;

protected:
  int m_maxSpan;
  std::string m_glueTargetLHSStr;
  Word m_glueTargetLHS;
};

}