/*
 * Copyright (c) Huawei Technologies Co., Ltd. 2025. All rights reserved.
 * You can use this software according to the terms and conditions of the Mulan PSL v2.
 * You may obtain a copy of Mulan PSL v2 at:
 *          http://license.coscl.org.cn/MulanPSL2
 * THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OF ANY KIND,
 * EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO NON-INFRINGEMENT,
 * MERCHANTABILITY OR FIT FOR A PARTICULAR PURPOSE.
 * See the Mulan PSL v2 for more details.
 */

// BufferAndBacklog.h
#ifndef BUFFERANDBACKLOG_H
#define BUFFERANDBACKLOG_H

#include <memory>
#include <string>
#include <buffer/VectorBatchBuffer.h>
#include <runtime/buffer/ObjectBufferDataType.h>

namespace omnistream {

class BufferAndBacklog {
public:
    BufferAndBacklog();
    BufferAndBacklog(
        Buffer* buffer, int buffersInBacklog, const ObjectBufferDataType& nextDataType, int sequenceNumber);
    ~BufferAndBacklog();

    Buffer* getBuffer() const;
    int getBuffersInBacklog() const;
    ObjectBufferDataType getNextDataType() const;
    int getSequenceNumber() const;

    bool isDataAvailable() const;
    bool isEventAvailable() const;

    static BufferAndBacklog fromBufferAndLookahead(
        Buffer* current, const ObjectBufferDataType& nextDataType, int backlog, int sequenceNumber_);

    std::string toString() const;

private:
    Buffer* buffer;
    int buffersInBacklog;
    ObjectBufferDataType nextDataType;
    int sequenceNumber;
};

} // namespace omnistream

#endif // BUFFERANDBACKLOG_H