/*
 * Copyright (c) 2013 Oracle and/or its affiliates. All rights reserved. This
 * code is released under a tri EPL/GPL/LGPL license. You can use it,
 * redistribute it and/or modify it under the terms of the:
 *
 * Eclipse Public License version 1.0
 * GNU General Public License version 2
 * GNU Lesser General Public License version 2.1
 */
package com.oracle.truffle.ruby.nodes.core;

import com.oracle.truffle.api.*;
import com.oracle.truffle.api.dsl.*;
import com.oracle.truffle.ruby.runtime.*;
import com.oracle.truffle.ruby.runtime.core.*;

@CoreClass(name = "main")
public abstract class MainNodes {

    @CoreMethod(names = "include", isSplatted = true, minArgs = 1)
    public abstract static class IncludeNode extends CoreMethodNode {

        public IncludeNode(RubyContext context, SourceSection sourceSection) {
            super(context, sourceSection);
        }

        public IncludeNode(IncludeNode prev) {
            super(prev);
        }

        @Specialization
        public NilPlaceholder include(RubyObject main, Object[] args) {
            // TODO(cs): copied from Module - but where does this method really come from?

            // Note that we traverse the arguments backwards

            for (int n = args.length - 1; n >= 0; n--) {
                if (args[n] instanceof RubyModule) {
                    final RubyModule included = (RubyModule) args[n];

                    // Note that we do appear to do full method lookup here
                    included.getLookupNode().lookupMethod("append_features").call(null, included, null, main.getSingletonClass());

                    // TODO(cs): call included hook
                }
            }

            return NilPlaceholder.INSTANCE;
        }
    }

    @CoreMethod(names = "to_s", needsSelf = false, maxArgs = 0)
    public abstract static class ToSNode extends CoreMethodNode {

        public ToSNode(RubyContext context, SourceSection sourceSection) {
            super(context, sourceSection);
        }

        public ToSNode(ToSNode prev) {
            super(prev);
        }

        @Specialization
        public RubyString toS() {
            return getContext().makeString("main");
        }

    }

}