<?php

/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements. See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership. The ASF 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.
 *
 * @package thrift.protocol
 * @author: rmarin (marin.radu@facebook.com)
 */

declare(strict_types=1);

namespace Thrift\Serializer;

use Thrift\Transport\TMemoryBuffer;
use Thrift\Protocol\TBinaryProtocolAccelerated;
use Thrift\Type\TMessageType;

/**
 * Utility class for serializing and deserializing
 * a thrift object using TBinaryProtocolAccelerated.
 */
class TBinarySerializer
{
    private static ?bool $hasAcceleratedProtocol = null;

    // NOTE(rmarin): Because thrift_protocol_write_binary
    // adds a begin message prefix, you cannot specify
    // a transport in which to serialize an object. It has to
    // be a string. Otherwise we will break the compatibility with
    // normal deserialization.
    public static function serialize(object $object): string
    {
        $transport = new TMemoryBuffer();
        $protocol = new TBinaryProtocolAccelerated($transport);
        if (self::hasAcceleratedProtocol()) {
            thrift_protocol_write_binary(
                $protocol,
                $object->getName(),
                TMessageType::REPLY,
                $object,
                0,
                $protocol->isStrictWrite()
            );

            $protocol->readMessageBegin($unused_name, $unused_type, $unused_seqid);
        } else {
            $object->write($protocol);
        }
        $protocol->getTransport()->flush();

        return $transport->getBuffer();
    }

    /**
     * @param class-string $class_name
     */
    public static function deserialize(string $string_object, string $class_name, int $buffer_size = 8192): object
    {
        $transport = new TMemoryBuffer();
        $protocol = new TBinaryProtocolAccelerated($transport);
        if (self::hasAcceleratedProtocol()) {
            // NOTE (t.heintz) TBinaryProtocolAccelerated internally wraps our TMemoryBuffer in a
            // TBufferedTransport, so we have to retrieve it again or risk losing data when writing
            // less than 512 bytes to the transport (see the comment there as well).
            // @see THRIFT-1579
            $protocol->writeMessageBegin('', TMessageType::REPLY, 0);
            $protocolTransport = $protocol->getTransport();
            $protocolTransport->write($string_object);
            $protocolTransport->flush();

            return thrift_protocol_read_binary($protocol, $class_name, $protocol->isStrictRead(), $buffer_size);
        } else {
            $transport->write($string_object);
            $object = new $class_name();
            $object->read($protocol);

            return $object;
        }
    }

    private static function hasAcceleratedProtocol(): bool
    {
        return self::$hasAcceleratedProtocol ??=
            function_exists('thrift_protocol_write_binary')
            && function_exists('thrift_protocol_read_binary');
    }
}
