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

#ifndef _SHELL_COMMAND_H
#define _SHELL_COMMAND_H

#include "base_object.h"

#include "helper_functions.h"
#include "functor_list.h"
#include "substring.h"

#include <stdarg.h>

#define SHELL_COMMAND_MAX_SIZE



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


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

// COMMAND REGISTRATION
// NO ARGUMENTS
#define ShellCommandRegister0 \
  static void registerCommand(const char* commandName, ClassID classID, void (T::*function)()) \
  { \
    if (isRegistered(commandName, classID, 0)== true) \
      return; \
    new ShellCommand<T>(commandName, classID, function); \
  }

#define ShellCommandRegister1(t1) \
  static void registerCommand(const char* commandName, ClassID classID, void (T::*function)(t1##_TYPE), t1##_TYPE d1 = t1##_DEFAULT) \
  { \
    if (isRegistered(commandName, classID, 1, t1##_PARAM)== true) \
      return; \
    new ShellCommand<T>(commandName, classID, function, d1); \
  }

// CONSTRUCTORS
#define ShellCommandConstructor0 \
  void (T::*functionPointer_0)(); \
  ShellCommand(const char* commandName, ClassID classID, void (T::*function)()) \
  : ShellCommandBase(commandName, classID, 0) \
  { \
    this->functionPointer_0 = function; \
  }

#define ShellCommandConstructor1(t1) \
  void (T::*functionPointer_1_##t1)(t1##_TYPE); \
  ShellCommand(const char* commandName, ClassID classID, void (T::*function)(t1##_TYPE), t1##_TYPE d1) \
  : ShellCommandBase(commandName, classID, 1, t1##_PARAM, d1) \
  { \
    this->functionPointer_1_##t1 = function; \
  }



#define ShellCommandExecute0 \
  if (this->paramCount == 0) \
    (dynamic_cast<T*>(object)->*functionPointer_0)()

#define ShellCommandExecute1(t1) \
   else if (this->paramCount == 1 && this->parameters[0] == t1##_PARAM) \
    (dynamic_cast<T*>(object)->*functionPointer_1_##t1)(t1##_FUNC(parameters, 0))


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

    static const tList<ShellCommandBase>* getCommandList() { return ShellCommandBase::commandList; };


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

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

    void debug();
  private:
    virtual void executeCommand (BaseObject* object, const char* parameters) = NULL;

  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
    unsigned int*                    parameters;          //!< Parameters
    bool                             isSingleton;         //!< if the Class is Singleton @todo autocheck

  private:
    long                             classID;             //!< The ID of the Class associated to this Command
    const char*                      className;           //!< The Name of the Class associated to this Command

    char*                            defaultStrings[FUNCTOR_MAX_ARGUMENTS];
    int                              defaultInts[FUNCTOR_MAX_ARGUMENTS];
    float                            defaultFloats[FUNCTOR_MAX_ARGUMENTS];
    bool                             defaultBools[FUNCTOR_MAX_ARGUMENTS];


    // 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);

#define FUNCTOR_LIST(x) ShellCommandRegister ## x
//#include "functor_list.h"
  FUNCTOR_LIST(0);
  FUNCTOR_LIST(1)(l_INT);
  FUNCTOR_LIST(1)(l_STRING);
#undef FUNCTOR_LIST


  private:
#define FUNCTOR_LIST(x) ShellCommandConstructor ## x
//#include "functor_list.h"
  FUNCTOR_LIST(0);
  FUNCTOR_LIST(1)(l_INT);
  FUNCTOR_LIST(1)(l_STRING);
#undef FUNCTOR_LIST

    virtual void executeCommand (BaseObject* object, const char* parameters)
    {
      if (parameters != NULL)
        //SubString params(parameters, ',');
#define FUNCTOR_LIST(x) ShellCommandExecute ## x
//#include "functor_list.h"
  FUNCTOR_LIST(0);
  FUNCTOR_LIST(1)(l_INT);
  //FUNCTOR_LIST(1)(l_STRING);
#undef FUNCTOR_LIST
    }
};

#endif /* _SHELL_COMMAND_H */