// $Id$

/***********************************************************************
Moses - factored phrase-based language decoder
Copyright (C) 2006 University of Edinburgh

This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.

This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
Lesser General Public License for more details.

You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
***********************************************************************/

#ifndef moses_Parameter_h
#define moses_Parameter_h

#include <string>
#include <set>
#include <map>
#include <vector>
#include "TypeDef.h"

namespace Moses
{

typedef std::vector<std::string>						PARAM_VEC;
typedef std::map<std::string, PARAM_VEC > 	PARAM_MAP;
typedef std::map<std::string, bool>         PARAM_BOOL;
typedef std::map<std::string, std::string > PARAM_STRING;

/** Handles parameter values set in config file or on command line.
 * Process raw parameter data (names and values as strings) for StaticData
 * to parse; to get useful values, see StaticData.
 */
class Parameter
{
protected:
  PARAM_MAP m_setting;
  PARAM_BOOL m_valid;
  PARAM_STRING m_abbreviation;
  PARAM_STRING m_description;
  PARAM_STRING m_fullname;

  std::map<std::string, std::vector<float> >  m_weights;

  std::string FindParam(const std::string &paramSwitch, int argc, char* argv[]);
  void OverwriteParam(const std::string &paramSwitch, const std::string &paramName, int argc, char* argv[]);
  bool ReadConfigFile(const std::string &filePath );
  bool FilesExist(const std::string &paramName, int fieldNo, std::vector<std::string> const& fileExtension=std::vector<std::string>(1,""));
  bool isOption(const char* token);
  bool Validate();

  void AddParam(const std::string &paramName, const std::string &description);
  void AddParam(const std::string &paramName, const std::string &abbrevName, const std::string &description);

  void PrintCredit();

  void SetWeight(const std::string &name, size_t ind, float weight);
  void SetWeight(const std::string &name, size_t ind, const std::vector<float> &weights);
  void AddWeight(const std::string &name, size_t ind, const std::vector<float> &weights);
  void ConvertWeightArgs();
  void ConvertWeightArgsSingleWeight(const std::string &oldWeightName, const std::string &newWeightName);
  void ConvertWeightArgsPhraseModel(const std::string &oldWeightName);
  void ConvertWeightArgsLM();
  void ConvertWeightArgsDistortion();
  void ConvertWeightArgsGeneration(const std::string &oldWeightName, const std::string &newWeightName);
  void ConvertWeightArgsWordPenalty();
  void CreateWeightsMap();
  void WeightOverwrite();
  void AddFeature(const std::string &line);


public:
  Parameter();
  ~Parameter();
  bool LoadParam(int argc, char* argv[]);
  bool LoadParam(const std::string &filePath);
  void Explain();

  /** return a vector of strings holding the whitespace-delimited values on the ini-file line corresponding to the given parameter name */
  const PARAM_VEC &GetParam(const std::string &paramName) {
    return m_setting[paramName];
  }
  /** check if parameter is defined (either in moses.ini or as switch) */
  bool isParamSpecified(const std::string &paramName) {
    return  m_setting.find( paramName ) != m_setting.end();
  }

  const std::string GetFullName(std::string abbr) {
    return m_fullname[abbr];
  }

  const std::string GetAbbreviation(std::string full) {
    return m_abbreviation[full];
  }
  const PARAM_VEC &GetParamShortName(const std::string &paramName) {
    return GetParam(GetFullName(paramName));
  }

  void OverwriteParam(const std::string &paramName, PARAM_VEC values);

  void OverwriteParamShortName(const std::string &paramShortName, PARAM_VEC values) {
    OverwriteParam(GetFullName(paramShortName),values);
  }

  std::vector<float> &GetWeights(const std::string &name);
  std::set<std::string> GetWeightNames() const;

  const PARAM_MAP &GetParams() const {
    return m_setting;
  }

  void Save(const std::string path);
};

}

#endif