/*
 * MapOfActions.hpp
 *
 *  Created on: 10.05.2010
 *      Author: heber
 */

#ifndef MAPOFACTIONS_HPP_
#define MAPOFACTIONS_HPP_

#include <boost/program_options.hpp>
#include <boost/lexical_cast.hpp>

#include <map>
#include <set>
#include <vector>
#include <typeinfo>

#include "Exceptions/IllegalTypeException.hpp"
#include "Exceptions/MissingValueException.hpp"
#include "Helpers/Assert.hpp"
#include "Patterns/Singleton.hpp"

class MapOfActionsTest;

class Box;
class atom;
class element;
class molecule;
class Vector;

namespace po = boost::program_options;

using boost::lexical_cast;

/** Central class for adding functionality to the code.
 *
 * In Molecuilder everything that can be done - such as adding atoms,
 * translating molecules, saving bind information - is an Action.
 *
 * In order to reference Action's with what the user sees, this class is the
 * mediator.
 *
 * An Action is described to the user by:
 * -# a name (this is the most important information)
 * -# a description
 * -# a shortform (single letter for use on the command line)
 * -# a text menu it resides in
 * -# the type of its argument
 * -# the command line category
 *
 * The Action::NAME is the most important information because every Action
 * registers itself automatically with the ActionRegistry and can be retrieved
 * therefrom and from this MapOfActions simply by knowing its name alone.
 *
 * In the constructor of MapOfActions all this is set.
 *
 * Note that Action will require input from the user. This is done via class
 * Query.
 *
 * And note also that MapOfActions actually contains more than just all
 * Actions: There are a number of names that actually are just arguments to
 * actions (e.g. "output-file").
 *
 * <h1> Howto add an Action</h1>
 *
 * Let us assume your new action (class) is called SuperDuperAction, consisting
 * of two files SuperDuperAction.cpp and SuperDuperAction.hpp.
 *
 * Furthermore, let's say you Action needs two values: a double value as a
 * upper threshold and a string which is the name of the output file.
 *
 * <h2> Command Line preliminaries </h2>
 *
 * You have to decide whether (for the command line) it makes sense to have an
 * extra argument requesting the arguments, or one should be the argument of
 * your action. I.e. your action name is "super-duper", then the use may
 * call your action like this:
 *
 * ./molecuilder --super-duper 4 --output-file test.dat
 *
 * Here, we have picked the threshold as the value for your action and the
 * name of the output file is given by an additional argument. Of course,
 * it can be the other way round or by two arguments such as here:
 *
 * ./molecuilder --super-duper --threshold 4 --output-file test.dat
 *
 * It depends on what possible arguments are already there (don't make up
 * new ones if present ones actually make sense for your action) and which
 * argument is more natural or closer to what your action does.
 *
 * <h2> Menu preliminaries </h2>
 *
 * Whatever you decide, your action will need some Query dialogs to request
 * the necessary information from the user, either via a command line
 * argument (--output-file) via a text dialog (referenced by "output-file")
 * or via a graphical dialog (same reference). And therein, the names
 * of the arguments have to re-appear.
 *
 * Then, the following steps have to be done to incorporate your Action:
 * -# create a unique name for your action (no capital letters) to reference
 *    it, this name has to appear in the file SuperDuperAction.cpp, e.g.
 *    "super-duper"
 * -# pick names the other required arguments, best if they are already
 *    present in the MapOfActions. They have to appear in Query's in the
 *    code of your Action.
 * -# With this name create entries in the following maps for the action
 *    name and for each names of a desired addtional argument if not present:
 *   -# DescriptionMap, a catchy description of what your action does
 *   -# TypeMap, see MapOfActions::OptionTypes for possible types of the single
 *      argument it takes.
 *   -# MenuContainsActionMap, in which menu should your action appear
 *   -# ShortFormMap (optional), single letter for command line call
 *   -# DefaultValueMap (optional), the default value (always a string)
 * -# add to one of the command line sets by the following categories
 *   -# generic - generic options (i.e. not one of the others)
 *   -# config - action/argument only considers internal bevahior, user
 *      does not have to see it while still having full functionality
 *   -# hidden - this should be hidden from the user
 *   -# visible - this should be visible to the user
 *   -# inputfile - this should only be parsed from an input file, not
 *      from command line
 * -# add to a menu, i.e. make an entry in MenuContainsActionMap.
 * -# add header file SuperDuperAction.hpp to MapOfActions.cpp and instantiate
 *    your action in populateMenu() (mind the sorting: 1. menu,
 *    2. alphabetical)
 *
 *  And that's.
 *
 *  Now, your action can be called from the command line, within the text
 *  menu and the graphical user interface.
 *
 */
class MapOfActions : public Singleton<MapOfActions> {
  friend class Singleton<MapOfActions>;
  friend class MapOfActionsTest;
public:
  enum OptionTypes { None, Boolean, Integer, ListOfIntegers, Double, ListOfDoubles, String, ListOfStrings, Vector, ListOfVectors, Box, Molecule, ListOfMolecules, Atom, ListOfAtoms, Element, ListOfElements };

  // getter for the action descriptions and short forms
  std::string getDescription(std::string actionname);
  std::string getKeyAndShortForm(std::string actionname);
  std::string getShortForm(std::string actionname);
  std::map <std::string, std::string> getShortFormToActionMap();

  void AddOptionsToParser();

  // check presence and getter for action type
  bool hasValue(std::string actionname);
  bool isShortFormPresent(std::string shortform);
  std::string  getValueType(std::string actionname);

  std::set<std::string> generic;
  std::set<std::string> config;
  std::set<std::string> hidden;
  std::set<std::string> visible;
  std::set<std::string> inputfile;

  std::multimap <std::string, std::string> MenuContainsActionMap;
  std::map <std::string, std::pair<std::string,std::string> > MenuDescription;

  // instantiates and puts all known actions into the ActionRegistry
  void populateActions();

  void queryCurrentValue(const char * name, class atom * &_T);
  void queryCurrentValue(const char * name, class element * &_T);
  void queryCurrentValue(const char * name, class molecule * &_T);
  void queryCurrentValue(const char * name, class Box &_T);
  void queryCurrentValue(const char * name, class Vector &_T);
  void queryCurrentValue(const char * name, std::vector<atom *>&_T);
  void queryCurrentValue(const char * name, std::vector<element *>&_T);
  void queryCurrentValue(const char * name, std::vector<molecule *>&_T);
  template<typename T> void queryCurrentValue(const char * name, T &_T)
  {
    if (typeid( T ) == *TypeMap[name]) { // constructor of type_info is private, hence can only store by ref or ptr
      if (CurrentValue.find(name) == CurrentValue.end())
        throw MissingValueException(__FILE__, __LINE__);
      _T = lexical_cast<T>(CurrentValue[name].c_str());
      CurrentValue.erase(name);
    } else
      throw IllegalTypeException(__FILE__,__LINE__);
  }
  template<typename T> void queryCurrentValue(const char * name, std::vector<T> &_T)
  {
    T temp;
    if (typeid( std::vector<T> ) == *TypeMap[name]) { // constructor of type_info is private, hence can only store by ref or ptr
      if (CurrentValue.find(name) == CurrentValue.end())
        throw MissingValueException(__FILE__, __LINE__);
      std::istringstream stream(CurrentValue[name]);
      CurrentValue.erase(name);
      while (!stream.fail()) {
        stream >> temp >> std::ws;
        _T.push_back(temp);
      }
    } else
      throw IllegalTypeException(__FILE__,__LINE__);
  }

  void setCurrentValue(const char * name, class atom * &_T);
  void setCurrentValue(const char * name, class element * &_T);
  void setCurrentValue(const char * name, class molecule * &_T);
  void setCurrentValue(const char * name, class Box &_T);
  void setCurrentValue(const char * name, class Vector &_T);
  void setCurrentValue(const char * name, std::vector<atom *>&_T);
  void setCurrentValue(const char * name, std::vector<element *>&_T);
  void setCurrentValue(const char * name, std::vector<molecule *>&_T);
  template<class T> void setCurrentValue(const char * name, T &_T)
  {
    std::ostringstream stream;
    if (typeid( T ) == *TypeMap[name]) {  // constructor of type_info is private, hence can only store by ref or ptr
      stream << _T;
      CurrentValue[name] = stream.str();
    } else
      throw IllegalTypeException(__FILE__,__LINE__);
  }
  template<class T> void setCurrentValue(const char * name, std::vector<T> &_T)
  {
    std::ostringstream stream;
    if (typeid( std::vector<T> ) == *TypeMap[name]) {  // constructor of type_info is private, hence can only store by ref or ptr
      std::ostringstream stream;
      for (typename std::vector<T>::iterator iter = _T.begin(); iter != _T.end(); ++iter) {
        stream << (*iter) << " ";
      }
      CurrentValue[name] = stream.str();
    } else
      throw IllegalTypeException(__FILE__,__LINE__);
  }


private:
  // private constructor and destructor
  MapOfActions();
  virtual ~MapOfActions();

  // lookup list from our configs to the ones of CommandLineParser
  std::map< std::set<std::string> *, po::options_description *> CmdParserLookup;

  // map of the action names and their description
  std::map<std::string, std::string> CurrentValue;
  std::map<std::string, std::string> DescriptionMap;
  std::map<std::string, std::string> ShortFormMap;
  std::map<std::string, const std::type_info * > TypeMap;
  std::map<const std::type_info *, enum OptionTypes > TypeEnumMap;
};


#endif /* MAPOFACTIONS_HPP_ */