// $Id$
//
// Copyright (C) 2008 
// Fraunhofer Institute for Open Communication Systems (FOKUS)
// Competence Center NETwork research (NET), St. Augustin, GERMANY
//     Stefan Bund <g0dil@berlios.de>
//
// This program is free software; you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation; either version 2 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the
// Free Software Foundation, Inc.,
// 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.

/** \file
    \brief ParsedCommand internal header */

#ifndef IH_ParsedCommand_
#define IH_ParsedCommand_ 1

// Custom includes

///////////////////////////////ih.p////////////////////////////////////////

namespace senf {
namespace console {
namespace detail {

#ifndef DOXYGEN

    struct ArgumentInfoBase
        : public intrusive_refcount
    {
        typedef boost::intrusive_ptr<ArgumentInfoBase> ptr;
        
        std::string type;
        std::string name;
        bool hasDefault;
        std::string doc;
        
        ArgumentInfoBase(std::string const & type);

        virtual std::string defaultValueStr() const = 0;
    };
    
    template <class ParameterType>
    struct ArgumentInfo 
        : public ArgumentInfoBase
    {
        typedef boost::intrusive_ptr<ArgumentInfo> ptr;

        static ptr create();
        ArgumentInfo();

        ParameterType defaultValue;

        virtual std::string defaultValueStr() const;
    };
    
    template <class Function, bool isFN=senf::is_any_function<Function>::value>
    struct ParsedCommandTraits
    {};

    // FirstArgType returns void, if the function has no arguments, otherwise it returns arg1_type

    template <class Traits, bool flag=(Traits::arity>0)>
    struct FirstArgType
    {
        typedef void type;
    };

    template <class Traits>
    struct FirstArgType<Traits,true>
    {
        typedef typename Traits::arg1_type type;
    };

    template <class Function>
    struct ParsedCommandTraits<Function, true>
    {
        typedef Function base_type;
        typedef typename senf::remove_any_pointer<base_type>::type function_type;
        typedef boost::function_traits<function_type> base_traits;
        typedef typename FirstArgType<base_traits>::type first_arg_type;

        static const bool has_ostream_arg = boost::is_same<first_arg_type, std::ostream &>::value;

        typedef typename boost::mpl::if_c<
            has_ostream_arg, 
            typename function_traits_remove_arg<base_traits>::type, 
            base_traits>
        ::type traits;

        static const bool is_member = boost::is_member_pointer<base_type>::value;
        
        typedef typename senf::member_class<base_type>::type class_type;
    };

    template <class Type>
    struct CheckVoidReturn
    {
        template <class Fn>
        static void call(Fn fn, std::ostream & os);
    };

    template <>
    struct CheckVoidReturn<void>
    {
        template <class Fn>
        static void call(Fn fn, std::ostream & os);
    };

#endif

}}}

///////////////////////////////ih.e////////////////////////////////////////
#endif


// Local Variables:
// mode: c++
// fill-column: 100
// comment-column: 40
// c-file-style: "senf"
// indent-tabs-mode: nil
// ispell-local-dictionary: "american"
// compile-command: "scons -u test"
// End: