// -*- mode: C++; c-indent-level: 4; c-basic-offset: 4; tab-width: 4 -*-
//
// Module.cpp: Rcpp R/C++ interface class library -- Rcpp modules
//
// Copyright (C) 2010 - 2015  Dirk Eddelbuettel and Romain Francois
//
// This file is part of Rcpp.
//
// Rcpp 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.
//
// Rcpp 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 Rcpp.  If not, see <http://www.gnu.org/licenses/>.

#define COMPILING_RCPP

#include <Rcpp.h>
#include "internal.h"

typedef Rcpp::XPtr<Rcpp::Module> XP_Module;
typedef Rcpp::XPtr<Rcpp::class_Base> XP_Class;
typedef Rcpp::XPtr<Rcpp::CppFunctionBase> XP_Function;

RCPP_FUN_1(bool, Class__has_default_constructor, XP_Class cl) {
    return cl->has_default_constructor();
}
RCPP_FUN_2(SEXP, Module__get_function, XP_Module module, std::string fun) {
    return module->get_function(fun);
}
RCPP_FUN_2(bool, Class__has_method, XP_Class cl, std::string m) {
	return cl->has_method(m);
}
RCPP_FUN_2(bool, Class__has_property, XP_Class cl, std::string m) {
	return cl->has_property(m);
}
RCPP_FUN_1(std::string, Class__name, XP_Class cl) {
	return cl->name;
}
RCPP_FUN_2(bool, Module__has_function, XP_Module module, std::string met) {
	return module->has_function(met);
}
RCPP_FUN_2(bool, Module__has_class, XP_Module module, std::string cl) {
	return module->has_class(cl);
}
RCPP_FUN_2(Rcpp::CppClass, Module__get_class, XP_Module module, std::string cl) {
	return module->get_class(cl);
}
RCPP_FUN_1(bool, CppObject__needs_init, SEXP xp) {
	return EXTPTR_PTR(xp) == 0;
}
RCPP_FUN_1(Rcpp::CharacterVector, CppClass__methods, XP_Class cl) {
	return cl->method_names();
}
RCPP_FUN_1(Rcpp::CharacterVector, CppClass__properties, XP_Class cl) {
	return cl->property_names();
}
RCPP_FUN_1(Rcpp::List, CppClass__property_classes, XP_Class cl) {
	return cl->property_classes();
}

RCPP_FUN_1(Rcpp::IntegerVector, CppClass__methods_arity, XP_Class cl) {
	return cl->methods_arity();
}
RCPP_FUN_1(Rcpp::LogicalVector, CppClass__methods_voidness, XP_Class cl) {
	return cl->methods_voidness();
}


RCPP_FUN_2(bool, CppClass__property_is_readonly, XP_Class cl, std::string p) {
	return cl->property_is_readonly(p);
}
RCPP_FUN_2(std::string, CppClass__property_class, XP_Class cl, std::string p) {
	return cl->property_class(p);
}

RCPP_FUN_1(Rcpp::IntegerVector, Module__functions_arity, XP_Module module) {
	return module->	functions_arity();
}
RCPP_FUN_1(Rcpp::CharacterVector, Module__functions_names, XP_Module module) {
	return module->	functions_names();
}
RCPP_FUN_1(std::string, Module__name, XP_Module module) {
	return module->name;
}
RCPP_FUN_1(Rcpp::List, Module__classes_info, XP_Module module) {
	return module->classes_info();
}
RCPP_FUN_1(Rcpp::CharacterVector, Module__complete, XP_Module module) {
	return module->complete();
}
RCPP_FUN_1(Rcpp::CharacterVector, CppClass__complete, XP_Class cl) {
	return cl->complete();
}

// these operate directly on the external pointers, rather than
// looking up the property in the map
RCPP_FUN_3(SEXP, CppField__get, XP_Class cl, SEXP field_xp, SEXP obj) {
	return cl->getProperty(field_xp, obj);
}
RCPP_FUN_4(SEXP, CppField__set, XP_Class cl, SEXP field_xp, SEXP obj, SEXP value) {
	cl->setProperty(field_xp, obj, value);
	return R_NilValue;
}
RCPP_FUN_2(SEXP, CppObject__finalize, XP_Class cl, SEXP obj) {
	cl->run_finalizer(obj);
	return R_NilValue;
}

// .External functions
SEXP InternalFunction_invoke(SEXP args) {
BEGIN_RCPP
	SEXP p = CDR(args);
	XP_Function fun(CAR(p)); p = CDR(p);
	UNPACK_EXTERNAL_ARGS(cargs,p)
	return fun->operator()(cargs);
END_RCPP
}

SEXP Module__invoke(SEXP args) {
BEGIN_RCPP
	SEXP p = CDR(args);
	XP_Module module(CAR(p)); p = CDR(p);
	std::string fun = Rcpp::as<std::string>(CAR(p)); p = CDR(p);

	UNPACK_EXTERNAL_ARGS(cargs,p)
	return module->invoke(fun, cargs, nargs);
END_RCPP
}

SEXP class__newInstance(SEXP args) {
	SEXP p = CDR(args);

	XP_Module module(CAR(p)); p = CDR(p);
	XP_Class clazz(CAR(p)); p = CDR(p);
	UNPACK_EXTERNAL_ARGS(cargs,p)
	return clazz->newInstance(cargs, nargs);
}

// relies on being set in .onLoad()
SEXP rcpp_dummy_pointer = R_NilValue;

#define CHECK_DUMMY_OBJ(p) if (p == rcpp_dummy_pointer) throw Rcpp::not_initialized()


SEXP class__dummyInstance(SEXP args) {
	SEXP p;

	if (args == R_NilValue) {
		return rcpp_dummy_pointer;
    }
	p  = CDR(args);

	if (p != R_NilValue) {
		rcpp_dummy_pointer = CAR(p);
    }
	return rcpp_dummy_pointer;
}

SEXP CppMethod__invoke(SEXP args) {
	SEXP p = CDR(args);

	// the external pointer to the class
	XP_Class clazz(CAR(p)); p = CDR(p);

	// the external pointer to the method
	SEXP met = CAR(p); p = CDR(p);

	// the external pointer to the object
	SEXP obj = CAR(p); p = CDR(p);
	CHECK_DUMMY_OBJ(obj);

	// additional arguments, processed the same way as .Call does
	UNPACK_EXTERNAL_ARGS(cargs,p)

   	return clazz->invoke(met, obj, cargs, nargs);
}

SEXP CppMethod__invoke_void(SEXP args) {
	SEXP p = CDR(args);

	// the external pointer to the class
	XP_Class clazz(CAR(p)); p = CDR(p);

	// the external pointer to the method
	SEXP met = CAR(p); p = CDR(p);

	// the external pointer to the object
	SEXP obj = CAR(p); p = CDR(p);
	CHECK_DUMMY_OBJ(obj);

	// additional arguments, processed the same way as .Call does
	UNPACK_EXTERNAL_ARGS(cargs,p)
	clazz->invoke_void(met, obj, cargs, nargs);
   	return R_NilValue;
}

SEXP CppMethod__invoke_notvoid(SEXP args) {
	SEXP p = CDR(args);

	// the external pointer to the class
	XP_Class clazz(CAR(p)); p = CDR(p);

	// the external pointer to the method
	SEXP met = CAR(p); p = CDR(p);

	// the external pointer to the object
	SEXP obj = CAR(p); p = CDR(p);
	CHECK_DUMMY_OBJ(obj);

	// additional arguments, processed the same way as .Call does
	UNPACK_EXTERNAL_ARGS(cargs,p)

   	return clazz->invoke_notvoid(met, obj, cargs, nargs);
}

namespace Rcpp{
	static Module* current_scope ;
}

Rcpp::Module* getCurrentScope() {
    return Rcpp::current_scope;
}
void setCurrentScope(Rcpp::Module* scope) {
    Rcpp::current_scope = scope;
}