// 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.

#pragma once

#include <gen_cpp/Types_types.h>

#include <gen_cpp/internal_service.pb.h>

#include <gen_cpp/types.pb.h>

#include <atomic>

#include <memory>

#include <mutex>

#include <shared_mutex>

#include <unordered_set>

#include <vector>

#include "common/status.h"

#include "load/delta_writer/delta_writer_context.h"

#include "load/memtable/memtable_writer.h"

#include "storage/olap_common.h"

#include "storage/rowset/rowset.h"

#include "storage/tablet/tablet.h"

#include "storage/tablet/tablet_meta.h"

#include "storage/tablet/tablet_schema.h"

#include "util/uid_util.h"

namespace doris {

class FlushToken;

class MemTable;

class StorageEngine;

class TupleDescriptor;

class SlotDescriptor;

class OlapTableSchemaParam;

class RowsetWriter;

class Block;

class BaseRowsetBuilder;

class RowsetBuilder;

// Writer for a particular (load, index, tablet).

// This class is NOT thread-safe, external synchronization is required.

class BaseDeltaWriter {

public:

    BaseDeltaWriter(const WriteRequest& req, RuntimeProfile* profile, const UniqueId& load_id);

    virtual ~BaseDeltaWriter();

    virtual Status write(const Block* block, const DorisVector<uint32_t>& row_idxs) = 0;

    // flush the last memtable to flush queue, must call it before build_rowset()

    virtual Status close() = 0;

    // wait for all memtables to be flushed.

    // mem_consumption() should be 0 after this function returns.

    virtual Status build_rowset();

    Status submit_calc_delete_bitmap_task();

    Status wait_calc_delete_bitmap();

    // abandon current memtable and wait for all pending-flushing memtables to be destructed.

    // mem_consumption() should be 0 after this function returns.

    Status cancel();

    virtual Status cancel_with_status(const Status& st);

    int64_t mem_consumption(MemType mem);

    // Wait all memtable in flush queue to be flushed

    Status wait_flush();

    int64_t partition_id() const { return _req.partition_id; }

    int64_t tablet_id() const { return _req.tablet_id; }

    int64_t txn_id() const { return _req.txn_id; }

    int64_t total_received_rows() const { return _memtable_writer->total_received_rows(); }

    int64_t num_rows_filtered() const;

    static void collect_tablet_load_rowset_num_info(

            BaseTablet* tablet,

            google::protobuf::RepeatedPtrField<PTabletLoadRowsetInfo>* tablet_infos);

    void set_tablet_load_rowset_num_info(

            google::protobuf::RepeatedPtrField<PTabletLoadRowsetInfo>* tablet_info);

protected:

    virtual void _init_profile(RuntimeProfile* profile);

    Status init();

    bool _is_init = false;

    bool _is_cancelled = false;

    WriteRequest _req;

    std::unique_ptr<BaseRowsetBuilder> _rowset_builder;

    std::shared_ptr<MemTableWriter> _memtable_writer;

    // total rows num written by DeltaWriter

    std::atomic<int64_t> _total_received_rows = 0;

    RuntimeProfile* _profile = nullptr;

    RuntimeProfile::Counter* _close_wait_timer = nullptr;

    RuntimeProfile::Counter* _wait_flush_limit_timer = nullptr;

    MonotonicStopWatch _lock_watch;

};

// `StorageEngine` mixin for `BaseDeltaWriter`

class DeltaWriter final : public BaseDeltaWriter {

public:

    DeltaWriter(StorageEngine& engine, const WriteRequest& req, RuntimeProfile* profile,

                const UniqueId& load_id);

    ~DeltaWriter() override;

    Status write(const Block* block, const DorisVector<uint32_t>& row_idxs) override;

    Status close() override;

    Status cancel_with_status(const Status& st) override;

    Status build_rowset() override;

    Status commit_txn(const PSlaveTabletNodes& slave_tablet_nodes);

    bool check_slave_replicas_done(google::protobuf::Map<int64_t, PSuccessSlaveTabletNodeIds>*

                                           success_slave_tablet_node_ids);

    void add_finished_slave_replicas(google::protobuf::Map<int64_t, PSuccessSlaveTabletNodeIds>*

                                             success_slave_tablet_node_ids);

    void finish_slave_tablet_pull_rowset(int64_t node_id, bool is_succeed);

private:

    void _init_profile(RuntimeProfile* profile) override;

    void _request_slave_tablet_pull_rowset(const PNodeInfo& node_info);

    // Convert `_rowset_builder` from `BaseRowsetBuilder` to `RowsetBuilder`

    RowsetBuilder* rowset_builder();

    std::mutex _lock;

    StorageEngine& _engine;

    std::unordered_set<int64_t> _unfinished_slave_node;

    PSuccessSlaveTabletNodeIds _success_slave_node_ids;

    std::shared_mutex _slave_node_lock;

    RuntimeProfile::Counter* _commit_txn_timer = nullptr;

};

} // namespace doris