/*
 * Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
 * or more contributor license agreements. Licensed under the "Elastic License
 * 2.0", the "GNU Affero General Public License v3.0 only", and the "Server Side
 * Public License v 1"; you may not use this file except in compliance with, at
 * your election, the "Elastic License 2.0", the "GNU Affero General Public
 * License v3.0 only", or the "Server Side Public License, v 1".
 */

package org.elasticsearch.painless.node;

import org.elasticsearch.painless.Location;
import org.elasticsearch.painless.phase.UserTreeVisitor;

import java.util.Collections;
import java.util.List;
import java.util.Objects;

/**
 * Represents a method call and defers to a child subnode.
 */
public class ECall extends AExpression {

    private final AExpression prefixNode;
    private final String methodName;
    private final List<AExpression> argumentNodes;
    private final boolean isNullSafe;

    public ECall(
        int identifier,
        Location location,
        AExpression prefixNode,
        String methodName,
        List<AExpression> argumentNodes,
        boolean isNullSafe
    ) {

        super(identifier, location);

        this.prefixNode = Objects.requireNonNull(prefixNode);
        this.methodName = Objects.requireNonNull(methodName);
        this.argumentNodes = Collections.unmodifiableList(Objects.requireNonNull(argumentNodes));
        this.isNullSafe = isNullSafe;
    }

    public AExpression getPrefixNode() {
        return prefixNode;
    }

    public String getMethodName() {
        return methodName;
    }

    public List<AExpression> getArgumentNodes() {
        return argumentNodes;
    }

    public boolean isNullSafe() {
        return isNullSafe;
    }

    @Override
    public <Scope> void visit(UserTreeVisitor<Scope> userTreeVisitor, Scope scope) {
        userTreeVisitor.visitCall(this, scope);
    }

    @Override
    public <Scope> void visitChildren(UserTreeVisitor<Scope> userTreeVisitor, Scope scope) {
        prefixNode.visit(userTreeVisitor, scope);

        for (AExpression argumentNode : argumentNodes) {
            argumentNode.visit(userTreeVisitor, scope);
        }
    }
}