#ifndef PERIODENTAFEL_HPP_
#define PERIODENTAFEL_HPP_

/*********************************************** includes ***********************************/

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

#include <iosfwd>
#include <map>
#include <string>

#include "unittests/periodentafelTest.hpp"
#include "Helpers/defs.hpp"
#include "types.hpp"

/****************************************** forward declarations *****************************/

class element;

/********************************************** declarations *******************************/


/** Periodentafel is a list of all elements sorted by their atomic number.
 */
class periodentafel {
  /******* Types *********/
  friend class periodentafelTest;
  private:
    typedef std::map<atomicNumber_t,element*> elementSet;
  public:
    typedef elementSet::iterator iterator;
    typedef elementSet::const_iterator const_iterator;
    typedef std::reverse_iterator<const_iterator> reverse_iterator;
  public:

    char header1[MAXSTRINGSIZE]; //!< store first header line
    char header2[MAXSTRINGSIZE]; //!< store second header line

  periodentafel();
  ~periodentafel();

  iterator AddElement(element * pointer);
  size_t RemoveElement(const element * pointer);
  size_t RemoveElement(atomicNumber_t);
  void CleanupPeriodtable();
  const element * FindElement(atomicNumber_t) const;
  const element * FindElement(const std::string &shorthand) const;
  const element * AskElement() const;
  const element * EnterElement();

  const_iterator begin() const;
  const_iterator end() const;
  reverse_iterator rbegin() const;
  reverse_iterator rend() const;
  bool Output(std::ostream * const output) const;
  bool LoadPeriodentafel(const char * const path);
  bool StorePeriodentafel(const char * const path) const;

  private:

  bool LoadElementsDatabase(std::istream &input);
  bool LoadValenceDatabase(std::istream *input);
  bool LoadOrbitalsDatabase(std::istream *input);
  bool LoadHBondAngleDatabase(std::istream *input);
  bool LoadHBondLengthsDatabase(std::istream *input);

    elementSet elements;
};


#endif /*PERIODENTAFEL_HPP_*/