#ifndef CONFIG__H
#define CONFIG__H

#include <memory>
#include <string>
#include <vector>
#include <boost/flyweight.hpp>
#include <boost/circular_buffer.hpp>
#include "util.hpp"

class Config
{
  protected :

  static constexpr const char * EOSColName = "EOS";
  static constexpr const char * EOSSymbol1 = "1";
  static constexpr const char * EOSSymbol0 = "0";
  static constexpr int nbHypothesesMax = 1;

  public :

  using String = boost::flyweight<std::string>;
  using Utf8String = boost::flyweight<util::utf8string>;
  using ValueIterator = std::vector<String>::iterator;
  using ConstValueIterator = std::vector<String>::const_iterator;

  private :

  std::vector<String> lines;

  public : 

  const Utf8String & rawInput;
  std::size_t wordIndex{0};
  std::size_t characterIndex{0};
  String state{"NONE"};
  boost::circular_buffer<String> history{10};

  protected :

  Config(const Utf8String & rawInput);

  public :

  virtual std::size_t getNbColumns() const = 0;
  virtual std::size_t getColIndex(const std::string & colName) const = 0;
  virtual bool hasColIndex(const std::string & colName) const = 0;
  virtual std::size_t getFirstLineIndex() const = 0;
  virtual const std::string & getColName(int colIndex) const = 0;

  std::size_t getIndexOfLine(int lineIndex) const;
  std::size_t getIndexOfCol(int colIndex) const;
  std::size_t getNbLines() const;
  void addLines(unsigned int nbLines);
  void resizeLines(unsigned int nbLines);
  bool has(int colIndex, int lineIndex, int hypothesisIndex) const;
  String & get(int colIndex, int lineIndex, int hypothesisIndex);
  const String & getConst(int colIndex, int lineIndex, int hypothesisIndex) const;
  String & getLastNotEmpty(int colIndex, int lineIndex);
  const String & getLastNotEmptyConst(int colIndex, int lineIndex) const;
  ValueIterator getIterator(int colIndex, int lineIndex, int hypothesisIndex);
  ConstValueIterator getConstIterator(int colIndex, int lineIndex, int hypothesisIndex) const;

  public :

  virtual ~Config() {}
  void print(FILE * dest) const;
  void printForDebug(FILE * dest) const;
  bool has(const std::string & colName, int lineIndex, int hypothesisIndex) const;
  String & get(const std::string & colName, int lineIndex, int hypothesisIndex);
  const String & getConst(const std::string & colName, int lineIndex, int hypothesisIndex) const;
  String & getLastNotEmpty(const std::string & colName, int lineIndex);
  const String & getLastNotEmptyConst(const std::string & colName, int lineIndex) const;
  bool hasLetter(int letterIndex) const;
  util::utf8char getLetter(int letterIndex) const;
  void addToHistory(const std::string & transition);
};

#endif