/* Menes - C++ High-Level Utility Library
 * Copyright (C) 2002-2003  Jay Freeman (saurik)
*/

/*
 *        Redistribution and use in source and binary
 * forms, with or without modification, are permitted
 * provided that the following conditions are met:
 * 
 * 1. Redistributions of source code must retain the
 *    above copyright notice, this list of conditions
 *    and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the
 *    above copyright notice, this list of conditions
 *    and the following disclaimer in the documentation
 *    and/or other materials provided with the
 *    distribution.
 * 3. The name of the author may not be used to endorse
 *    or promote products derived from this software
 *    without specific prior written permission.
 * 
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS''
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
 * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
 * TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
 * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/

#ifndef MENES_API_RUBY_HPP
#define MENES_API_RUBY_HPP

#include "cxx/platform.hpp"
#include "api/linkage.hpp"

#ifdef MENES_PRAGMA_ONCE
#pragma once
#endif

#include "hop/function.hpp"
#include "ext/refcount.hpp"

#include <string>
#include <ruby.h>

template <typename To_, typename From_>
To_ ruby_cast(const From_ &value);

template <>
inline VALUE ruby_cast<VALUE, int>(const int &value) {
    return INT2NUM(value);
}

template <>
inline VALUE ruby_cast<VALUE, float>(const float &value) {
    return rb_float_new(value);
}

template <>
inline VALUE ruby_cast<VALUE, double>(const double &value) {
    return rb_float_new(value);
}

template <>
inline VALUE ruby_cast<VALUE, const char *>(const char * const &value) {
    return rb_str_new2(value);
}

template <>
inline VALUE ruby_cast<VALUE, std::string>(const std::string &value) {
    return ruby_cast<VALUE>(value.c_str());
}

namespace api {
namespace Ruby {

typedef _R<class Class> ClassHandle;
typedef _R<class Method> MethodHandle;

class Class :
    public ext::ReferenceCounted
{
  private:
    VALUE value_;

  public:
    Class(VALUE value);

    VALUE GetValue();

    template <typename Prototype_>
    MethodHandle DefineMethod(const std::string &name, const hop::Function<Prototype_> &function) {
        return NULL;
    }
};

class Method :
    public ext::ReferenceCounted
{
  private:
    VALUE value_;

  public:
    Method(VALUE value);

    VALUE GetValue();
};

class Environment {
    typedef Ruby::Class Class;
    typedef Ruby::Method Method;

    typedef _R<Class> ClassHandle;
    typedef _R<Method> MethodHandle;

    template <typename Type_>
    ClassHandle DefineClass_(const std::string &name, VALUE base) {
        return new Class(::rb_define_class(name.c_str(), base));
    }

  public:
    Environment();
    ~Environment();

    template <typename Type_>
    ClassHandle DefineClass(const std::string &name) {
        return DefineClass_<Type_>(name, rb_cObject);
    }

    template <typename Type_>
    ClassHandle DefineClass(const std::string &name, const ClassHandle &base) {
        return DefineClass_<Type_>(name, base->GetValue());
    }
};

} }

#endif//MENES_API_RUBY_HPP