/*!
 * @file shell_command.h
 * Definition of a on-screen-shell
*/

#ifndef _SHELL_COMMAND_H
#define _SHELL_COMMAND_H

#include "base_object.h"

#include <stdarg.h>

#define MAX_SHELL_COMMAND_SIZE

#include "functor_list.h"


// FORWARD DECLARATION
template<class T> class tList;
template<class T> class tIterator;


///////////////////////
// MACRO DEFINITIONS //
///////////////////////


#define ShellCommand2(type1, type2) \
 public: \
  static void registerCommand(const char* commandName, ClassID classID, T* object, void (T::*function)(type1##_TYPE, type2##_TYPE) \
                              type1##_TYPE default1 = type1##_DEFAULT, type2##_TYPE default2 = type2##_DEFAULT) \
  { \
     if (isRegistered(commandName, classID, 2, type1##_PARAM, type2##_PARAM) == true) \
       return; \
     else \
       ShellCommand<T>* newCommand = new ShellCommand<T>(commandName, classID, object, function); \
  } \
 private: \
  void (T::*functionPointer_##type1_##type2)(type1##_TYPE, type2##_TYPE); \
  ShellCommand(const char* commandName, ClassID classID, T* object, void (T::*function)(type1##_TYPE, type2##_TYPE) \
                              type1##_TYPE default1 = type1##_DEFAULT, type2##_TYPE default2 = type2##_DEFAULT) \
  { \
    this->functionPointer_##type1_##type2 = function; \
  }


////////////////
// BASE CLASS //
////////////////
//! a baseClass for all possible ShellCommands
class ShellCommandBase : public BaseObject
{
  public:
    static bool execute (const char* executionString);

    virtual void executeCommand (const char* parameters) = NULL;

  protected:
    ShellCommandBase(const char* commandName, ClassID classID, unsigned int paramCount, ...);
    ~ShellCommandBase();

    static bool isRegistered(const char* commandName, ClassID classID, unsigned int paramCount, ...);


  protected:
    void*                            functionPointer;     //!< The pointeer to the function of the Class (or static pointer if ClassID == CL_NULL )
    unsigned int                     paramCount;          //!< the count of parameters
    ParameterType*                   parameters;          //!< Parameters

  private:
    char*                            commandName;         //!< The name of the Command when executed
    long                             classID;             //!< The ID of the Class asociated to this Command

    // STATIC MEMBERS
    static tList<ShellCommandBase>*  commandList;         //!< A list of availiable commands.
};

template<class T> class ShellCommand;

template<class T> class ShellCommandSingleton : public ShellCommandBase
{
  friend class ShellCommand<T>;
  private:
    ShellCommandSingleton(const char* commandName, ClassID classID, void (T::*functionPointer)())
    : ShellCommandBase (commandName, classID, 0)
    {
      this->functionPointer_NULL = functionPointer;

    }
    void (T::*functionPointer_NULL)();
    virtual void executeCommand (const char* parameters)
    {
      if (this->paramCount == 0)
        (T::getInstance()->*functionPointer_NULL)();
    }
};


//! keeps information about a ShellCommand
template<class T> class ShellCommand : public ShellCommandBase
{
  public:
    static void unregisterCommand(const char* commandNaame, ClassID classID);

    static void registerCommand(const char* commandName, ClassID classID, void (T::*functionPointer)(), bool isSingleton = false)
    {
      if (isRegistered(commandName, classID, 0)== true)
        return;
      else
      {
        if (isSingleton == false)
          new ShellCommand<T>(commandName, classID, functionPointer);
        else
          new ShellCommandSingleton<T>(commandName, classID, functionPointer);
      }
    }

  private:
    void (T::*functionPointer_NULL)();
    ShellCommand(const char* commandName, ClassID classID, void (T::*functionPointer)())
      : ShellCommandBase (commandName, classID, 0)
    {
      this->functionPointer_NULL = functionPointer;
    }
    virtual void executeCommand (const char* parameters)
    {
/*      if (this->paramCount == 0)
        (objectPointer->*functionPointer_NULL)();*/
    }



#define FUNCTOR_LIST(x) ShellCommand ## x
//#include "functor_list.h"
//ShellCommand2(l_INT, l_INT);
#undef FUNCTOR_LIST

  private:
//    T*                   objectPointer;       //!< The pointer to the object to apply this function to (NULL if classID == CL_NULL )
};



#endif /* _SHELL_COMMAND_H */