/*
 * Project: MoleCuilder
 * Description: creates and alters molecular systems
 * Copyright (C)  2010 University of Bonn. All rights reserved.
 * Please see the LICENSE file or "Copyright notice" in builder.cpp for details.
 */

/** \file FormatParserStorage.cpp
 *
 *  date: Jun, 22 2010
 *  author: heber
 *
 */

// include config.h
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif

#include "CodePatterns/MemDebug.hpp"

#include <iostream>
#include <fstream>

#include <boost/preprocessor/iteration/local.hpp>

#include "CodePatterns/Assert.hpp"
#include "CodePatterns/Log.hpp"

#include "molecule.hpp"
#include "FormatParserStorage.hpp"
#include "ParserTypes.hpp"

#include "MpqcParser.hpp"
#include "PcpParser.hpp"
#include "PdbParser.hpp"
#include "TremoloParser.hpp"
#include "XyzParser.hpp"

#include "CodePatterns/Singleton_impl.hpp"


/** Constructor of class FormatParserStorage.
 */
FormatParserStorage::FormatParserStorage()
{
  ParserList.resize(ParserTypes_end, NULL);
  ParserStream.resize(ParserTypes_end, NULL);
  ParserPresent.resize(ParserTypes_end, false);

#include "ParserTypes.def"

#define insert_print(z,n,seq,map, before, after) \
   map .insert( std::make_pair(  \
     BOOST_PP_SEQ_ELEM(n, seq) \
     , before < \
       BOOST_PP_SEQ_ELEM(n, seq) \
       > after \
     ) );
  
#define insert_invert_print(z,n,seq,map, before, after) \
   map .insert( std::make_pair( before < \
   BOOST_PP_SEQ_ELEM(n, seq) \
   > after, \
   BOOST_PP_SEQ_ELEM(n, seq) \
  ) );

  // fill ParserNames
#if defined ParserTypes_END // do we have parameters at all?
#define BOOST_PP_LOCAL_MACRO(n) insert_print(~, n, PARSERSEQUENCE, ParserNames, FormatParserTrait, ::name)
#define BOOST_PP_LOCAL_LIMITS  (0, ParserTypes_END-1)
#include BOOST_PP_LOCAL_ITERATE()
#endif

  // fill ParserLookupNames
#if defined ParserTypes_END // do we have parameters at all?
#define BOOST_PP_LOCAL_MACRO(n) insert_invert_print(~, n, PARSERSEQUENCE, ParserLookupNames, FormatParserTrait, ::name)
#define BOOST_PP_LOCAL_LIMITS  (0, ParserTypes_END-1)
#include BOOST_PP_LOCAL_ITERATE()
#endif

  // fill ParserSuffixes
#if defined ParserTypes_END // do we have parameters at all?
#define BOOST_PP_LOCAL_MACRO(n) insert_print(~, n, PARSERSEQUENCE, ParserSuffixes, FormatParserTrait, ::suffix)
#define BOOST_PP_LOCAL_LIMITS  (0, ParserTypes_END-1)
#include BOOST_PP_LOCAL_ITERATE()
#endif

  // fill ParserLookupSuffixes
#if defined ParserTypes_END // do we have parameters at all?
#define BOOST_PP_LOCAL_MACRO(n) insert_invert_print(~, n, PARSERSEQUENCE, ParserLookupSuffixes, FormatParserTrait, ::suffix)
#define BOOST_PP_LOCAL_LIMITS  (0, ParserTypes_END-1)
#include BOOST_PP_LOCAL_ITERATE()
#endif

  // fill ParserAddFunction
#if defined ParserTypes_END // do we have parameters at all?
#define BOOST_PP_LOCAL_MACRO(n) insert_print(~, n, PARSERSEQUENCE, ParserAddFunction, &FormatParserStorage::addParser, )
#define BOOST_PP_LOCAL_LIMITS  (0, ParserTypes_END-1)
#include BOOST_PP_LOCAL_ITERATE()
#endif

#undef insert_print
#undef insert_invert_print
#include "ParserTypes.undef"

  //std::cout << "ParserNames:" << std::endl << ParserNames << std::endl;
  //std::cout << "ParserSuffixes:" << std::endl << ParserSuffixes << std::endl;
  //std::cout << "ParserLookupNames:" << std::endl << ParserLookupNames << std::endl;
  //std::cout << "ParserLookupSuffixes:" << std::endl << ParserLookupSuffixes << std::endl;
  //std::cout << "ParserAddFunction:" << std::endl << ParserAddFunction << std::endl;

}

/** Destructor of class FormatParserStorage.
 * Free all stored FormatParsers. 
 * Save on Exit.
 */
FormatParserStorage::~FormatParserStorage()
{
  for (ParserTypes iter = ParserTypes_begin; iter < ParserTypes_end; ++iter)
    if (ParserPresent[iter]) {
      if (ParserStream[iter]->is_open())
        ParserStream[iter]->close();
      delete ParserStream[iter];
      delete ParserList[iter];
    }
}

/** Sets the filename of all current parsers in storage to prefix.suffix.
 * \param &prefix prefix to use.
 */
void FormatParserStorage::SetOutputPrefixForAll(std::string &_prefix)
{
  prefix=_prefix;
};


void FormatParserStorage::SaveAll()
{
  std::string filename;
  for (ParserTypes iter = ParserTypes_begin; iter < ParserTypes_end; ++iter)
    if (ParserPresent[iter]) {
      filename = prefix;
      filename += ".";
      filename += ParserSuffixes[iter];
      ParserStream[iter] = new std::ofstream(filename.c_str());
      ParserList[iter]->setOstream((std::ostream *)ParserStream[iter]);
    }
}


ParserTypes FormatParserStorage::getTypeFromName(std::string type)
{
  if (ParserLookupNames.find(type) == ParserLookupNames.end()) {
    DoeLog(1) && (eLog() << Verbose(1) << "Unknown type " << type << "." << endl);
    return ParserTypes_end;
  } else
    return ParserLookupNames[type];
}

ParserTypes FormatParserStorage::getTypeFromSuffix(std::string type)
{
  if (ParserLookupSuffixes.find(type) == ParserLookupSuffixes.end()) {
    DoeLog(1) && (eLog() << Verbose(1) << "Unknown type " << type << "." << endl);
    return ParserTypes_end;
  } else
    return ParserLookupSuffixes[type];
}

bool FormatParserStorage::add(ParserTypes ptype)
{
  if (ptype != ParserTypes_end) {
    if (ParserAddFunction.find(ptype) != ParserAddFunction.end()) {
      LOG(0, "STATUS: Adding " << ParserNames[ptype] << " type to output.");
      (getInstance().*(ParserAddFunction[ptype]))(); // we still need an object to work on ...
      return true;
    } else {
      ELOG(1, "No parser to add for this known type " << ParserNames[ptype] << ", not implemented?");
      return false;
    }
  } else {
    return false;
  }
}

bool FormatParserStorage::add(std::string type)
{
  enum ParserTypes Ptype = getTypeFromName(type);
  return add(Ptype);
}


/** Parses an istream depending on its suffix
 * \param &input input stream
 * \param suffix
 * \return true - parsing ok, false - suffix unknown
 */
bool FormatParserStorage::load(std::istream &input, std::string suffix)
{
  enum ParserTypes type = getTypeFromSuffix(suffix);
  if (type != ParserTypes_end)
    get(type).load(&input);
  else
    return false;
  return true;
}

/** Stores all selected atoms in an ostream depending on its suffix
 * \param &output output stream
 * \param suffix
 * \return true - storing ok, false - suffix unknown
 */
bool FormatParserStorage::saveSelectedAtoms(std::ostream &output, std::string suffix)
{
  std::vector<atom *> atoms = World::getInstance().getSelectedAtoms();
  return save(output, suffix, atoms);
}

/** Stores all selected atoms in an ostream depending on its suffix
 * We store in the order of the atomic ids, not in the order they appear in the molecules.
 * Hence, we first create a vector from all selected molecules' atoms.
 * \param &output output stream
 * \param suffix
 * \return true - storing ok, false - suffix unknown
 */
bool FormatParserStorage::saveSelectedMolecules(std::ostream &output, std::string suffix)
{
  std::vector<molecule *> molecules = World::getInstance().getSelectedMolecules();
  std::map<size_t, atom *> IdAtoms;
  for (std::vector<molecule *>::const_iterator MolIter = molecules.begin();
      MolIter != molecules.end();
      ++MolIter) {
    for(molecule::atomSet::const_iterator AtomIter = (*MolIter)->begin();
        AtomIter != (*MolIter)->end();
        ++AtomIter) {
      IdAtoms.insert( make_pair((*AtomIter)->getId(), (*AtomIter)) );
    }
  }
  std::vector<atom *> atoms;
  atoms.reserve(IdAtoms.size());
  for (std::map<size_t, atom *>::const_iterator iter = IdAtoms.begin();
      iter != IdAtoms.end();
      ++iter) {
    atoms.push_back(iter->second);
  }
  return save(output, suffix, atoms);
}

/** Stores world in an ostream depending on its suffix
 * \param &output output stream
 * \param suffix
 * \return true - storing ok, false - suffix unknown
 */
bool FormatParserStorage::saveWorld(std::ostream &output, std::string suffix)
{
  std::vector<atom *> atoms = World::getInstance().getAllAtoms();
  return save(output, suffix, atoms);
}

/** Stores a given vector of \a atoms in an ostream depending on its suffix
 * \param &output output stream
 * \param suffix
 * \return true - storing ok, false - suffix unknown
 */
bool FormatParserStorage::save(std::ostream &output, std::string suffix, const std::vector<atom *> &atoms)
{
  enum ParserTypes type = getTypeFromSuffix(suffix);
  if (type != ParserTypes_end)
    get(type).save(&output, atoms);
  else
    return false;
  return true;
}

/** Returns reference to the desired output parser as FormatParser, adds if not present.
 * \param _type type of desired parser
 * \return reference to the output FormatParser with desired type
 */
FormatParserInterface &FormatParserStorage::get(ParserTypes _type)
{
  if (!ParserPresent[_type]) {
    add(_type);
  }
  return *ParserList[_type];
}

CONSTRUCT_SINGLETON(FormatParserStorage)