#ifndef OBJTOOLS__PUBSEQ_GATEWAY__CASSANDRA__BLOB_TASK__FETCH_HPP_
#define OBJTOOLS__PUBSEQ_GATEWAY__CASSANDRA__BLOB_TASK__FETCH_HPP_

/*  $Id: fetch.hpp 651942 2022-06-28 14:10:54Z saprykin $
 * ===========================================================================
 *
 *                            PUBLIC DOMAIN NOTICE
 *               National Center for Biotechnology Information
 *
 *  This software/database is a "United States Government Work" under the
 *  terms of the United States Copyright Act.  It was written as part of
 *  the author's official duties as a United States Government employee and
 *  thus cannot be copyrighted.  This software/database is freely available
 *  to the public for use. The National Library of Medicine and the U.S.
 *  Government have not placed any restriction on its use or reproduction.
 *
 *  Although all reasonable efforts have been taken to ensure the accuracy
 *  and reliability of the software and data, the NLM and the U.S.
 *  Government do not and cannot warrant the performance or results that
 *  may be obtained by using this software or data. The NLM and the U.S.
 *  Government disclaim all warranties, express or implied, including
 *  warranties of performance, merchantability or fitness for any particular
 *  purpose.
 *
 *  Please cite the author in any work or product based on this material.
 *
 * ===========================================================================
 *
 * Authors: Dmitrii Saprykin
 *
 * File Description:
 *
 * Cassandra insert blob according to extended schema task.
 *
 */

#include <functional>
#include <string>
#include <memory>
#include <vector>

#include <corelib/ncbistr.hpp>

#include <objtools/pubseq_gateway/impl/cassandra/cass_blob_op.hpp>
#include <objtools/pubseq_gateway/impl/cassandra/IdCassScope.hpp>
#include <objtools/pubseq_gateway/impl/cassandra/nannot/record.hpp>

BEGIN_IDBLOB_SCOPE
USING_NCBI_SCOPE;

class CCassNAnnotTaskFetch
    : public CCassBlobWaiter
{
    enum EBlobFetchState {
        eInit = 0,
        eFetchStarted,
        eDone = CCassBlobWaiter::eDone,
        eError = CCassBlobWaiter::eError
    };

 public:
    CCassNAnnotTaskFetch(
        shared_ptr<CCassConnection> connection,
        const string & keyspace,
        string accession,
        int16_t version,
        int16_t seq_id_type,
        const vector<string> & annot_names,
        TNAnnotConsumeCallback consume_callback,
        TDataErrorCallback data_error_cb
    );

    CCassNAnnotTaskFetch(
        shared_ptr<CCassConnection> connection,
        const string & keyspace,
        string accession,
        int16_t version,
        int16_t seq_id_type,
        const vector<CTempString> & annot_names,
        TNAnnotConsumeCallback consume_callback,
        TDataErrorCallback data_error_cb
    );

    CCassNAnnotTaskFetch(
        shared_ptr<CCassConnection> connection,
        const string & keyspace,
        string accession,
        int16_t version,
        int16_t seq_id_type,
        TNAnnotConsumeCallback consume_callback,
        TDataErrorCallback data_error_cb
    );

    void SetDataReadyCB(shared_ptr<CCassDataCallbackReceiver> callback);
    void SetConsumeCallback(TNAnnotConsumeCallback callback);

    string GetAccession() const
    {
        return m_Accession;
    }

    int16_t GetVersion() const
    {
        return m_Version;
    }

    int16_t GetSeqIdType() const
    {
        return m_SeqIdType;
    }

    vector<string> GetAnnotNames() const
    {
        if (!m_AnnotNamesTemp.empty()) {
            vector<string> result;
            result.reserve(m_AnnotNamesTemp.size());
            for (CTempString const& item : m_AnnotNamesTemp) {
                result.push_back(item);
            }
            return result;
        }
        return m_AnnotNames;
    }

 protected:
    void Wait1() override;

 private:
    size_t x_AnnotNamesSize() const;
    size_t x_AnnotNamesCount(string const & more) const;
    void x_AnnotNamesBind(shared_ptr<CCassQuery>& query, string const & more, unsigned int first) const;

    string m_Accession;
    int16_t m_Version{-1};
    int16_t m_SeqIdType{-1};
    vector<string> m_AnnotNames;
    vector<CTempString> m_AnnotNamesTemp;
    TNAnnotConsumeCallback m_Consume{nullptr};
    string m_LastConsumedAnnot;
 protected:
    unsigned int m_PageSize{CCassQuery::DEFAULT_PAGE_SIZE};
    unsigned int m_RestartCounter{0};
};

END_IDBLOB_SCOPE

#endif  // OBJTOOLS__PUBSEQ_GATEWAY__CASSANDRA__BLOB_TASK__FETCH_HPP_
