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 * 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
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 * (a) the Software, and
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 * (b) any piece of software and/or hardware listed in the lrgrwrks.txt file if
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package com.oracle.js.parser.ir;

import com.oracle.js.parser.ir.visitor.NodeVisitor;
import com.oracle.js.parser.ir.visitor.TranslatorNodeVisitor;

/**
 * IR representation for {@code with} statements.
 */
public final class WithNode extends LexicalContextStatement {
    /** This expression. */
    private final Expression expression;

    /** Statements. */
    private final Block body;

    /**
     * Constructor
     *
     * @param lineNumber Line number of the header
     * @param token First token
     * @param finish Character index of the last token
     * @param expression With expression
     * @param body Body of with node
     */
    public WithNode(final int lineNumber, final long token, final int finish, final Expression expression, final Block body) {
        super(lineNumber, token, finish);
        this.expression = expression;
        this.body = body;
    }

    private WithNode(final WithNode node, final Expression expression, final Block body) {
        super(node);
        this.expression = expression;
        this.body = body;
    }

    /**
     * Assist in IR navigation.
     *
     * @param visitor IR navigating visitor.
     */
    @Override
    public Node accept(final LexicalContext lc, final NodeVisitor visitor) {
        if (visitor.enterWithNode(this)) {
            //@formatter:off
            return visitor.leaveWithNode(
                setExpression(lc, (Expression) expression.accept(visitor)).
                setBody(lc, (Block) body.accept(visitor)));
            //@formatter:on
        }
        return this;
    }

    @Override
    public  R accept(LexicalContext lc, TranslatorNodeVisitor visitor) {
        return visitor.enterWithNode(this);
    }

    @Override
    public boolean isTerminal() {
        return body.isTerminal();
    }

    @Override
    public void toString(final StringBuilder sb, final boolean printType) {
        sb.append("with (");
        expression.toString(sb, printType);
        sb.append(')');
    }

    /**
     * Get the body of this WithNode
     *
     * @return the body
     */
    public Block getBody() {
        return body;
    }

    /**
     * Reset the body of this with node
     *
     * @param lc lexical context
     * @param body new body
     * @return new or same withnode
     */
    public WithNode setBody(final LexicalContext lc, final Block body) {
        if (this.body == body) {
            return this;
        }
        return Node.replaceInLexicalContext(lc, this, new WithNode(this, expression, body));
    }

    /**
     * Get the expression of this WithNode
     *
     * @return the expression
     */
    public Expression getExpression() {
        return expression;
    }

    /**
     * Reset the expression of this with node
     *
     * @param lc lexical context
     * @param expression new expression
     * @return new or same withnode
     */
    public WithNode setExpression(final LexicalContext lc, final Expression expression) {
        if (this.expression == expression) {
            return this;
        }
        return Node.replaceInLexicalContext(lc, this, new WithNode(this, expression, body));
    }

    @Override
    public boolean isCompletionValueNeverEmpty() {
        return true;
    }
}