#ifndef moses_LexicalReordering_h
#define moses_LexicalReordering_h

#include <string>
#include <vector>
#include "Factor.h"
#include "Phrase.h"
#include "TypeDef.h"
#include "Util.h"
#include "WordsRange.h"
#include "ScoreProducer.h"
#include "FeatureFunction.h"

#include "LexicalReorderingState.h"
#include "LexicalReorderingTable.h"

namespace Moses
{

class Factor;
class Phrase;
class Hypothesis;
class InputType;

/** implementation of lexical reordering (Tilman ...) for phrase-based decoding
 */
class LexicalReordering : public StatefulFeatureFunction {
public:   
  LexicalReordering(const std::string &line);
  virtual ~LexicalReordering();

  virtual FFState* Evaluate(const Hypothesis& cur_hypo,
                            const FFState* prev_state,
                            ScoreComponentCollection* accumulator) const;

  virtual const FFState* EmptyHypothesisState(const InputType &input) const;

  void InitializeForInput(const InputType& i){
      m_table->InitializeForInput(i);
  }

  Scores GetProb(const Phrase& f, const Phrase& e) const;

  virtual FFState* EvaluateChart(const ChartHypothesis&,
                                 int /* featureID */,
																 ScoreComponentCollection*) const {
		CHECK(0); // not valid for chart decoder
		return NULL;
	}

private:
    bool DecodeCondition(std::string s);
    bool DecodeDirection(std::string s);
    bool DecodeNumFeatureFunctions(std::string s);

    LexicalReorderingConfiguration *m_configuration;
    std::string m_modelTypeString;
    std::vector<std::string> m_modelType;
    LexicalReorderingTable* m_table;
    //std::vector<Direction> m_direction;
    std::vector<LexicalReorderingConfiguration::Condition> m_condition;
    //std::vector<size_t> m_scoreOffset;
    //bool m_oneScorePerDirection;
    std::vector<FactorType> m_factorsE, m_factorsF;
};

}

#endif