// Copyright (c) 2003 Daniel Wallin and Arvid Norberg

// Permission is hereby granted, free of charge, to any person obtaining a
// copy of this software and associated documentation files (the "Software"),
// to deal in the Software without restriction, including without limitation
// the rights to use, copy, modify, merge, publish, distribute, sublicense,
// and/or sell copies of the Software, and to permit persons to whom the
// Software is furnished to do so, subject to the following conditions:

// The above copyright notice and this permission notice shall be included
// in all copies or substantial portions of the Software.

// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF
// ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED
// TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
// PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT
// SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR
// ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
// ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE
// OR OTHER DEALINGS IN THE SOFTWARE.


#if !BOOST_PP_IS_ITERATING

#ifndef LUABIND_CALL_FUNCTION_HPP_INCLUDED
#define LUABIND_CALL_FUNCTION_HPP_INCLUDED

#include <luabind/config.hpp>
#include <luabind/detail/convert_to_lua.hpp>
#include <luabind/detail/pcall.hpp>
#include <luabind/error.hpp>
#include <luabind/object.hpp>

#include <boost/mpl/if.hpp>
#include <boost/mpl/or.hpp>
#include <boost/preprocessor/iteration/iterate.hpp>
#include <boost/preprocessor/punctuation/comma_if.hpp>
#include <boost/preprocessor/repeat.hpp>
#include <boost/preprocessor/repetition/enum.hpp>
#include <boost/preprocessor/repetition/enum_binary_params.hpp>
#include <boost/preprocessor/repetition/enum_params.hpp>
#include <boost/tuple/tuple.hpp>

namespace luabind
{
    namespace detail
    {

        // if the proxy_function_caller returns non-void
            template<class Ret, class Tuple>
            class proxy_function_caller
            {
//          friend class luabind::object;
            public:

                typedef int(*function_t)(lua_State*, int, int);

                proxy_function_caller(
                    lua_State* L
                    , int params
                    , function_t fun
                    , const Tuple args)
                    : m_args(args)
                    , m_fun(fun)
                    , m_state(L)
                    , m_params(params)
                    , m_called(false)
                {
                }

                proxy_function_caller(const proxy_function_caller& rhs)
                    : m_args(rhs.m_args)
                    , m_fun(rhs.m_fun)
                    , m_state(rhs.m_state)
                    , m_params(rhs.m_params)
                    , m_called(rhs.m_called)
                {
                    rhs.m_called = true;
                }

                ~proxy_function_caller() LUABIND_MAY_THROW
                {
                    if (m_called) return;

                    m_called = true;
                    lua_State* L = m_state;

                    int top = lua_gettop(L);

                    push_args_from_tuple<1>::apply(L, m_args);
                    if (m_fun(L, boost::tuples::length<Tuple>::value, 0))
                    {
                        assert(lua_gettop(L) == top - m_params + 1);
#ifndef LUABIND_NO_EXCEPTIONS
                        throw luabind::error(L);
#else
                        error_callback_fun e = get_error_callback();
                        if (e) e(L);

                        assert(0 && "the lua function threw an error and exceptions are disabled."
                                    " If you want to handle the error you can use luabind::set_error_callback()");
                        std::terminate();

#endif
                    }

                    // pops the return values from the function call
                    stack_pop pop(L, lua_gettop(L) - top + m_params);
                }

                operator Ret()
                {
                    typename mpl::apply_wrap2<default_policy,Ret,lua_to_cpp>::type converter;

                    m_called = true;
                    lua_State* L = m_state;

                    int top = lua_gettop(L);

                    push_args_from_tuple<1>::apply(L, m_args);
                    if (m_fun(L, boost::tuples::length<Tuple>::value, 1))
                    {
                        assert(lua_gettop(L) == top - m_params + 1);
#ifndef LUABIND_NO_EXCEPTIONS
                        throw luabind::error(L);
#else
                        error_callback_fun e = get_error_callback();
                        if (e) e(L);

                        assert(0 && "the lua function threw an error and exceptions are disabled."
                                " If you want to handle the error you can use luabind::set_error_callback()");
                        std::terminate();
#endif
                    }

                    // pops the return values from the function call
                    stack_pop pop(L, lua_gettop(L) - top + m_params);

                    if (converter.match(L, LUABIND_DECORATE_TYPE(Ret), -1) < 0)
                    {
#ifndef LUABIND_NO_EXCEPTIONS
                        throw cast_failed(L, typeid(Ret));
#else
                        cast_failed_callback_fun e = get_cast_failed_callback();
                        if (e) e(L, typeid(Ret));

                        assert(0 && "the lua function's return value could not be converted."
                                    " If you want to handle the error you can use luabind::set_error_callback()");
                        std::terminate();
#endif
                    }
                    return converter.apply(L, LUABIND_DECORATE_TYPE(Ret), -1);
                }

                template<class Policies>
                Ret operator[](const Policies& p)
                {
                    typedef typename detail::find_conversion_policy<0, Policies>::type converter_policy;
                    typename mpl::apply_wrap2<converter_policy,Ret,lua_to_cpp>::type converter;

                    m_called = true;
                    lua_State* L = m_state;

                    int top = lua_gettop(L);

                    detail::push_args_from_tuple<1>::apply(L, m_args, p);
                    if (m_fun(L, boost::tuples::length<Tuple>::value, 1))
                    {
                        assert(lua_gettop(L) == top - m_params + 1);
#ifndef LUABIND_NO_EXCEPTIONS
                        throw error(L);
#else
                        error_callback_fun e = get_error_callback();
                        if (e) e(L);

                        assert(0 && "the lua function threw an error and exceptions are disabled."
                                " If you want to handle the error you can use luabind::set_error_callback()");
                        std::terminate();
#endif
                    }

                    // pops the return values from the function call
                    stack_pop pop(L, lua_gettop(L) - top + m_params);

                    if (converter.match(L, LUABIND_DECORATE_TYPE(Ret), -1) < 0)
                    {
#ifndef LUABIND_NO_EXCEPTIONS
                        throw cast_failed(L, typeid(Ret));
#else
                        cast_failed_callback_fun e = get_cast_failed_callback();
                        if (e) e(L, typeid(Ret));

                        assert(0 && "the lua function's return value could not be converted."
                                    " If you want to handle the error you can use luabind::set_error_callback()");
                        std::terminate();

#endif
                    }
                    return converter.apply(L, LUABIND_DECORATE_TYPE(Ret), -1);
                }

            private:

                Tuple m_args;
                function_t m_fun;
                lua_State* m_state;
                int m_params;
                mutable bool m_called;

            };

        // if the proxy_member_caller returns void
            template<class Tuple>
            class proxy_function_void_caller
            {
            friend class luabind::object;
            public:

                typedef int(*function_t)(lua_State*, int, int);

                proxy_function_void_caller(
                    lua_State* L
                    , int params
                    , function_t fun
                    , const Tuple args)
                    : m_state(L)
                    , m_params(params)
                    , m_fun(fun)
                    , m_args(args)
                    , m_called(false)
                {
                }

                proxy_function_void_caller(const proxy_function_void_caller& rhs)
                    : m_state(rhs.m_state)
                    , m_params(rhs.m_params)
                    , m_fun(rhs.m_fun)
                    , m_args(rhs.m_args)
                    , m_called(rhs.m_called)
                {
                    rhs.m_called = true;
                }

                ~proxy_function_void_caller() LUABIND_MAY_THROW
                {
                    if (m_called) return;

                    m_called = true;
                    lua_State* L = m_state;

                    int top = lua_gettop(L);

                    push_args_from_tuple<1>::apply(L, m_args);
                    if (m_fun(L, boost::tuples::length<Tuple>::value, 0))
                    {
                        assert(lua_gettop(L) == top - m_params + 1);
#ifndef LUABIND_NO_EXCEPTIONS
                        throw luabind::error(L);
#else
                        error_callback_fun e = get_error_callback();
                        if (e) e(L);

                        assert(0 && "the lua function threw an error and exceptions are disabled."
                                " If you want to handle the error you can use luabind::set_error_callback()");
                        std::terminate();
#endif
                    }
                    // pops the return values from the function call
                    stack_pop pop(L, lua_gettop(L) - top + m_params);
                }

                template<class Policies>
                void operator[](const Policies& p)
                {
                    m_called = true;
                    lua_State* L = m_state;

                    int top = lua_gettop(L);

                    detail::push_args_from_tuple<1>::apply(L, m_args, p);
                    if (m_fun(L, boost::tuples::length<Tuple>::value, 0))
                    {
                        assert(lua_gettop(L) == top - m_params + 1);
#ifndef LUABIND_NO_EXCEPTIONS
                        throw error(L);
#else
                        error_callback_fun e = get_error_callback();
                        if (e) e(L);

                        assert(0 && "the lua function threw an error and exceptions are disabled."
                            " If you want to handle the error you can use luabind::set_error_callback()");
                        std::terminate();
#endif
                    }
                    // pops the return values from the function call
                    stack_pop pop(L, lua_gettop(L) - top + m_params);
                }

            private:

                lua_State* m_state;
                int m_params;
                function_t m_fun;
                Tuple m_args;
                mutable bool m_called;

            };

    }

    #define BOOST_PP_ITERATION_PARAMS_1 (4, (0, LUABIND_MAX_ARITY, <luabind/detail/call_function.hpp>, 1))
    #include BOOST_PP_ITERATE()

}

#endif // LUABIND_CALL_FUNCTION_HPP_INCLUDED

#else
#if BOOST_PP_ITERATION_FLAGS() == 1

#define LUABIND_TUPLE_PARAMS(z, n, data) const A##n *
#define LUABIND_OPERATOR_PARAMS(z, n, data) const A##n & a##n


    template<class Ret BOOST_PP_COMMA_IF(BOOST_PP_ITERATION()) BOOST_PP_ENUM_PARAMS(BOOST_PP_ITERATION(), class A)>
    typename boost::mpl::if_<boost::is_void<Ret>
            , luabind::detail::proxy_function_void_caller<boost::tuples::tuple<BOOST_PP_ENUM(BOOST_PP_ITERATION(), LUABIND_TUPLE_PARAMS, _)> >
            , luabind::detail::proxy_function_caller<Ret, boost::tuples::tuple<BOOST_PP_ENUM(BOOST_PP_ITERATION(), LUABIND_TUPLE_PARAMS, _)> > >::type
    call_function(lua_State* L, const char* name BOOST_PP_COMMA_IF(BOOST_PP_ITERATION()) BOOST_PP_ENUM(BOOST_PP_ITERATION(), LUABIND_OPERATOR_PARAMS, _) )
    {
        assert(name && "luabind::call_function() expects a function name");
        typedef boost::tuples::tuple<BOOST_PP_ENUM(BOOST_PP_ITERATION(), LUABIND_TUPLE_PARAMS, _)> tuple_t;
#if BOOST_PP_ITERATION() == 0
        tuple_t args;
#else
        tuple_t args(BOOST_PP_ENUM_PARAMS(BOOST_PP_ITERATION(), &a));
#endif
        typedef typename boost::mpl::if_<boost::is_void<Ret>
            , luabind::detail::proxy_function_void_caller<boost::tuples::tuple<BOOST_PP_ENUM(BOOST_PP_ITERATION(), LUABIND_TUPLE_PARAMS, _)> >
            , luabind::detail::proxy_function_caller<Ret, boost::tuples::tuple<BOOST_PP_ENUM(BOOST_PP_ITERATION(), LUABIND_TUPLE_PARAMS, _)> > >::type proxy_type;

        lua_getglobal(L, name);

        return proxy_type(L, 1, &detail::pcall, args);
    }

    template<class Ret BOOST_PP_COMMA_IF(BOOST_PP_ITERATION()) BOOST_PP_ENUM_PARAMS(BOOST_PP_ITERATION(), class A)>
    typename boost::mpl::if_<boost::is_void<Ret>
            , luabind::detail::proxy_function_void_caller<boost::tuples::tuple<BOOST_PP_ENUM(BOOST_PP_ITERATION(), LUABIND_TUPLE_PARAMS, _)> >
            , luabind::detail::proxy_function_caller<Ret, boost::tuples::tuple<BOOST_PP_ENUM(BOOST_PP_ITERATION(), LUABIND_TUPLE_PARAMS, _)> > >::type
    call_function(luabind::object const& obj BOOST_PP_COMMA_IF(BOOST_PP_ITERATION()) BOOST_PP_ENUM(BOOST_PP_ITERATION(), LUABIND_OPERATOR_PARAMS, _) )
    {
        typedef boost::tuples::tuple<BOOST_PP_ENUM(BOOST_PP_ITERATION(), LUABIND_TUPLE_PARAMS, _)> tuple_t;
#if BOOST_PP_ITERATION() == 0
        tuple_t args;
#else
        tuple_t args(BOOST_PP_ENUM_PARAMS(BOOST_PP_ITERATION(), &a));
#endif
        typedef typename boost::mpl::if_<boost::is_void<Ret>
            , luabind::detail::proxy_function_void_caller<boost::tuples::tuple<BOOST_PP_ENUM(BOOST_PP_ITERATION(), LUABIND_TUPLE_PARAMS, _)> >
            , luabind::detail::proxy_function_caller<Ret, boost::tuples::tuple<BOOST_PP_ENUM(BOOST_PP_ITERATION(), LUABIND_TUPLE_PARAMS, _)> > >::type proxy_type;

        obj.push(obj.interpreter());
        return proxy_type(obj.interpreter(), 1, &detail::pcall, args);
    }

    template<class Ret BOOST_PP_COMMA_IF(BOOST_PP_ITERATION()) BOOST_PP_ENUM_PARAMS(BOOST_PP_ITERATION(), class A)>
    typename boost::mpl::if_<boost::is_void<Ret>
            , luabind::detail::proxy_function_void_caller<boost::tuples::tuple<BOOST_PP_ENUM(BOOST_PP_ITERATION(), LUABIND_TUPLE_PARAMS, _)> >
            , luabind::detail::proxy_function_caller<Ret, boost::tuples::tuple<BOOST_PP_ENUM(BOOST_PP_ITERATION(), LUABIND_TUPLE_PARAMS, _)> > >::type
    resume_function(lua_State* L, const char* name BOOST_PP_COMMA_IF(BOOST_PP_ITERATION()) BOOST_PP_ENUM(BOOST_PP_ITERATION(), LUABIND_OPERATOR_PARAMS, _) )
    {
        assert(name && "luabind::resume_function() expects a function name");
        typedef boost::tuples::tuple<BOOST_PP_ENUM(BOOST_PP_ITERATION(), LUABIND_TUPLE_PARAMS, _)> tuple_t;
#if BOOST_PP_ITERATION() == 0
        tuple_t args;
#else
        tuple_t args(BOOST_PP_ENUM_PARAMS(BOOST_PP_ITERATION(), &a));
#endif
        typedef typename boost::mpl::if_<boost::is_void<Ret>
            , luabind::detail::proxy_function_void_caller<boost::tuples::tuple<BOOST_PP_ENUM(BOOST_PP_ITERATION(), LUABIND_TUPLE_PARAMS, _)> >
            , luabind::detail::proxy_function_caller<Ret, boost::tuples::tuple<BOOST_PP_ENUM(BOOST_PP_ITERATION(), LUABIND_TUPLE_PARAMS, _)> > >::type proxy_type;

        lua_getglobal(L, name);

        return proxy_type(L, 1, &detail::resume_impl, args);
    }

    template<class Ret BOOST_PP_COMMA_IF(BOOST_PP_ITERATION()) BOOST_PP_ENUM_PARAMS(BOOST_PP_ITERATION(), class A)>
    typename boost::mpl::if_<boost::is_void<Ret>
            , luabind::detail::proxy_function_void_caller<boost::tuples::tuple<BOOST_PP_ENUM(BOOST_PP_ITERATION(), LUABIND_TUPLE_PARAMS, _)> >
            , luabind::detail::proxy_function_caller<Ret, boost::tuples::tuple<BOOST_PP_ENUM(BOOST_PP_ITERATION(), LUABIND_TUPLE_PARAMS, _)> > >::type
    resume_function(luabind::object const& obj BOOST_PP_COMMA_IF(BOOST_PP_ITERATION()) BOOST_PP_ENUM(BOOST_PP_ITERATION(), LUABIND_OPERATOR_PARAMS, _) )
    {
        typedef boost::tuples::tuple<BOOST_PP_ENUM(BOOST_PP_ITERATION(), LUABIND_TUPLE_PARAMS, _)> tuple_t;
#if BOOST_PP_ITERATION() == 0
        tuple_t args;
#else
        tuple_t args(BOOST_PP_ENUM_PARAMS(BOOST_PP_ITERATION(), &a));
#endif
        typedef typename boost::mpl::if_<boost::is_void<Ret>
            , luabind::detail::proxy_function_void_caller<boost::tuples::tuple<BOOST_PP_ENUM(BOOST_PP_ITERATION(), LUABIND_TUPLE_PARAMS, _)> >
            , luabind::detail::proxy_function_caller<Ret, boost::tuples::tuple<BOOST_PP_ENUM(BOOST_PP_ITERATION(), LUABIND_TUPLE_PARAMS, _)> > >::type proxy_type;

        obj.push(obj.interpreter());
        return proxy_type(obj.interpreter(), 1, &detail::resume_impl, args);
    }

    template<class Ret BOOST_PP_COMMA_IF(BOOST_PP_ITERATION()) BOOST_PP_ENUM_PARAMS(BOOST_PP_ITERATION(), class A)>
    typename boost::mpl::if_<boost::is_void<Ret>
            , luabind::detail::proxy_function_void_caller<boost::tuples::tuple<BOOST_PP_ENUM(BOOST_PP_ITERATION(), LUABIND_TUPLE_PARAMS, _)> >
            , luabind::detail::proxy_function_caller<Ret, boost::tuples::tuple<BOOST_PP_ENUM(BOOST_PP_ITERATION(), LUABIND_TUPLE_PARAMS, _)> > >::type
    resume(lua_State* L BOOST_PP_COMMA_IF(BOOST_PP_ITERATION()) BOOST_PP_ENUM(BOOST_PP_ITERATION(), LUABIND_OPERATOR_PARAMS, _) )
    {
        typedef boost::tuples::tuple<BOOST_PP_ENUM(BOOST_PP_ITERATION(), LUABIND_TUPLE_PARAMS, _)> tuple_t;
#if BOOST_PP_ITERATION() == 0
        tuple_t args;
#else
        tuple_t args(BOOST_PP_ENUM_PARAMS(BOOST_PP_ITERATION(), &a));
#endif
        typedef typename boost::mpl::if_<boost::is_void<Ret>
            , luabind::detail::proxy_function_void_caller<boost::tuples::tuple<BOOST_PP_ENUM(BOOST_PP_ITERATION(), LUABIND_TUPLE_PARAMS, _)> >
            , luabind::detail::proxy_function_caller<Ret, boost::tuples::tuple<BOOST_PP_ENUM(BOOST_PP_ITERATION(), LUABIND_TUPLE_PARAMS, _)> > >::type proxy_type;

        return proxy_type(L, 0, &detail::resume_impl, args);
    }


#undef LUABIND_OPERATOR_PARAMS
#undef LUABIND_TUPLE_PARAMS


#endif
#endif
