/*
 * Copyright (c) 2018, 2020, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * The Universal Permissive License (UPL), Version 1.0
 *
 * Subject to the condition set forth below, permission is hereby granted to any
 * person obtaining a copy of this software, associated documentation and/or
 * data (collectively the "Software"), free of charge and under any and all
 * copyright rights in the Software, and any and all patent rights owned or
 * freely licensable by each licensor hereunder covering either (i) the
 * unmodified Software as contributed to or provided by such licensor, or (ii)
 * the Larger Works (as defined below), to deal in both
 *
 * (a) the Software, and
 *
 * (b) any piece of software and/or hardware listed in the lrgrwrks.txt file if
 * one is included with the Software each a "Larger Work" to which the Software
 * is contributed by such licensors),
 *
 * without restriction, including without limitation the rights to copy, create
 * derivative works of, display, perform, and distribute the Software and make,
 * use, sell, offer for sale, import, export, have made, and have sold the
 * Software and the Larger Work(s), and to sublicense the foregoing rights on
 * either these or other terms.
 *
 * This license is subject to the following condition:
 *
 * The above copyright notice and either this complete permission notice or at a
 * minimum a reference to the UPL must be included in all copies or substantial
 * portions of the Software.
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package com.oracle.truffle.js.nodes.access;

import com.oracle.truffle.api.frame.VirtualFrame;
import com.oracle.truffle.api.instrumentation.Tag;
import com.oracle.truffle.api.object.DynamicObject;
import com.oracle.truffle.api.profiles.BranchProfile;
import com.oracle.truffle.js.nodes.JavaScriptNode;
import com.oracle.truffle.js.nodes.function.JSFunctionCallNode;
import com.oracle.truffle.js.runtime.Errors;
import com.oracle.truffle.js.runtime.JSArguments;
import com.oracle.truffle.js.runtime.objects.IteratorRecord;

import java.util.Set;

IteratorNext(iterator) unary expression.
/**
 * IteratorNext(iterator) unary expression.
 */
public class IteratorNextUnaryNode extends JavaScriptNode {
    @Child private JSFunctionCallNode methodCallNode;
    @Child private IsJSObjectNode isObjectNode;
    @Child private JavaScriptNode iteratorNode;
    private final BranchProfile errorBranch = BranchProfile.create();

    protected IteratorNextUnaryNode(JavaScriptNode iteratorNode) {
        this.iteratorNode = iteratorNode;
        this.methodCallNode = JSFunctionCallNode.createCall();
        this.isObjectNode = IsJSObjectNode.create();
    }

    public static JavaScriptNode create(JavaScriptNode iteratorNode) {
        return new IteratorNextUnaryNode(iteratorNode);
    }

    @Override
    public Object execute(VirtualFrame frame) {
        IteratorRecord iterator = (IteratorRecord) iteratorNode.execute(frame);
        return execute(iterator);
    }

    public Object execute(IteratorRecord iteratorRecord) {
        DynamicObject iterator = iteratorRecord.getIterator();
        Object next = iteratorRecord.getNextMethod();
        Object nextResult = methodCallNode.executeCall(JSArguments.createZeroArg(iterator, next));
        if (!isObjectNode.executeBoolean(nextResult)) {
            errorBranch.enter();
            throw Errors.createTypeErrorIteratorResultNotObject(nextResult, this);
        }
        return nextResult;
    }

    @Override
    protected JavaScriptNode copyUninitialized(Set<Class<? extends Tag>> materializedTags) {
        return create(cloneUninitialized(iteratorNode, materializedTags));
    }
}