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//
// This example is provided by the Geant4-DNA collaboration
// Any report or published results obtained using the Geant4-DNA software
// shall cite the following Geant4-DNA collaboration publication:
// Med. Phys. 37 (2010) 4692-4708
// J. Comput. Phys. 274 (2014) 841-882
// The Geant4-DNA web site is available at http://geant4-dna.org
//
// Author: Mathieu Karamitros
//
//
/// \file CommandLineParser.hh
/// \brief Definition of the CommandLineParser class

#ifndef COMMANDLINEPARSER_HH
#define COMMANDLINEPARSER_HH

#include "globals.hh"

#include <map>

namespace G4DNAPARSER
{
class Command
{
  public:
    enum Type
    {
      WithOption,
      WithoutOption,
      OptionNotCompulsory
    };

    virtual const G4String& GetOption() { return fNoOption; }
    Command::Type GetType() { return fType; }
    G4bool IsActive() { return fActive; }
    const G4String& GetDescription() { return fDescription; }
    virtual const G4String& GetOptionName() { return fNoOption; }
    virtual const G4String& GetDefaultOption() { return fNoOption; }

    virtual void SetOption(const G4String&) { ; }
    virtual void SetOptionName(const G4String&) { ; }
    virtual void SetDefaultOption(const G4String&) { ; }

  protected:
    friend class CommandLineParser;
    Type fType;
    G4bool fActive;
    G4String fDescription;
    static G4String fNoOption;

    Command(Type, const G4String& description = "");
    virtual ~Command() { ; }
};

class CommandWithOption : public Command
{
  public:
    virtual const G4String& GetOption() { return fOption; }
    virtual const G4String& GetOptionName() { return fOptionName; }
    virtual const G4String& GetDefaultOption() { return fDefaultOption; }

    virtual void SetOption(const G4String& in_op) { fOption = in_op; }
    virtual void SetOptionName(const G4String& in_op) { fOptionName = in_op; }
    virtual void SetDefaultOption(const G4String& in_op) { fDefaultOption = in_op; }

  private:
    friend class CommandLineParser;
    CommandWithOption(Type, const G4String& description = "", const G4String& defaultOption = "",
                      const G4String& optionName = "optionName");

    virtual ~CommandWithOption() { ; }

    G4String fOption;
    G4String fDefaultOption;
    G4String fOptionName;
};

class CommandLineParser
{
    static CommandLineParser* fpInstance;
    std::map<G4String, Command*> fCommandMap;
    G4bool fOptionsWereSetup;
    G4int fMaxMarkerLength;
    G4int fMaxOptionNameLength;
    G4int fVerbose;

  public:
    static CommandLineParser* GetParser();
    CommandLineParser();
    ~CommandLineParser();
    static void DeleteInstance();
    int Parse(int& argc, char** argv);
    void PrintHelp();
    bool CheckIfNotHandledOptionsExists(int& argc, char** argv);
    void CorrectRemainingOptions(int& argc, char** argv);
    void AddCommand(const G4String& marker, Command::Type, const G4String& description = "",
                    const G4String& defaultOption = "", const G4String& optionName = "");
    Command* FindCommand(const G4String& marker);
    Command* GetCommandIfActive(const G4String& marker);
    G4bool WereOptionsSetup() { return fOptionsWereSetup; }
};
}  // namespace G4DNAPARSER
#endif  // PARSER_HH
