<?php

/*
 * Licensed to Elasticsearch B.V. under one or more contributor
 * license agreements. See the NOTICE file distributed with
 * this work for additional information regarding copyright
 * ownership. Elasticsearch B.V. licenses this file to you under
 * the Apache License, Version 2.0 (the "License"); you may
 * not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */

declare(strict_types=1);

namespace Elastic\Apm\Impl;

use Elastic\Apm\DistributedTracingData;
use Elastic\Apm\Impl\Util\StaticClassTrait;

/**
 * Code in this file is part of implementation internals and thus it is not covered by the backward compatibility.
 *
 * @internal
 */
final class NoopDistributedTracingData
{
    use StaticClassTrait;

    /** @var DistributedTracingData */
    private static $data;

    /** @var string */
    private static $dataSerializedToString;

    public static function get(): DistributedTracingData
    {
        if (self::$data === null) {
            self::$data = new DistributedTracingData();
            self::$data->traceId = NoopExecutionSegment::TRACE_ID;
            self::$data->parentId = NoopExecutionSegment::ID;
            self::$data->isSampled = false;
        }

        return self::$data;
    }

    public static function serializedToString(): string
    {
        if (self::$dataSerializedToString === null) {
            /** @noinspection PhpDeprecationInspection */
            self::$dataSerializedToString = self::get()->serializeToString();
        }

        return self::$dataSerializedToString;
    }
}