// 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.

#include "load/delta_writer/delta_writer_v2.h"

#include <brpc/controller.h>

#include <butil/errno.h>

#include <fmt/format.h>

#include <gen_cpp/internal_service.pb.h>

#include <gen_cpp/olap_file.pb.h>

#include <filesystem>

#include <ostream>

#include <string>

#include <utility>

#include "common/compiler_util.h" // IWYU pragma: keep

#include "common/config.h"

#include "common/logging.h"

#include "common/status.h"

#include "core/block/block.h"

#include "exec/sink/load_stream_stub.h"

#include "io/fs/file_writer.h" // IWYU pragma: keep

#include "runtime/exec_env.h"

#include "runtime/query_context.h"

#include "service/backend_options.h"

#include "storage/data_dir.h"

#include "storage/index/inverted/inverted_index_desc.h"

#include "storage/olap_define.h"

#include "storage/rowset/beta_rowset.h"

#include "storage/rowset/beta_rowset_writer_v2.h"

#include "storage/rowset/rowset_meta.h"

#include "storage/rowset/rowset_writer.h"

#include "storage/rowset/rowset_writer_context.h"

#include "storage/schema.h"

#include "storage/schema_change/schema_change.h"

#include "storage/segment/segment.h"

#include "storage/storage_engine.h"

#include "storage/tablet/tablet_manager.h"

#include "storage/tablet/tablet_schema.h"

#include "storage/tablet_info.h"

#include "util/brpc_client_cache.h"

#include "util/brpc_closure.h"

#include "util/debug_points.h"

#include "util/mem_info.h"

#include "util/stopwatch.hpp"

#include "util/time.h"

namespace doris {

using namespace ErrorCode;

DeltaWriterV2::DeltaWriterV2(WriteRequest* req,

                             const std::vector<std::shared_ptr<LoadStreamStub>>& streams,

                             RuntimeState* state)

        : _state(state),

          _req(*req),

          _tablet_schema(new TabletSchema),

          _memtable_writer(new MemTableWriter(*req)),

          _streams(streams) {}

void DeltaWriterV2::_update_profile(RuntimeProfile* profile) {

    auto child = profile->create_child(fmt::format("DeltaWriterV2 {}", _req.tablet_id), true, true);

    auto write_memtable_timer = ADD_TIMER(child, "WriteMemTableTime");

    auto wait_flush_limit_timer = ADD_TIMER(child, "WaitFlushLimitTime");

    auto close_wait_timer = ADD_TIMER(child, "CloseWaitTime");

    COUNTER_SET(write_memtable_timer, _write_memtable_time);

    COUNTER_SET(wait_flush_limit_timer, _wait_flush_limit_time);

    COUNTER_SET(close_wait_timer, _close_wait_time);

}

DeltaWriterV2::~DeltaWriterV2() {

    if (!_is_init) {

        return;

    }

    // cancel and wait all memtables in flush queue to be finished

    static_cast<void>(_memtable_writer->cancel());

}

Status DeltaWriterV2::init() {

    if (_is_init) {

        return Status::OK();

    }

    // build tablet schema in request level

    DBUG_EXECUTE_IF("DeltaWriterV2.init.stream_size", { _streams.clear(); });

    if (_streams.size() == 0 || _streams[0]->tablet_schema(_req.index_id) == nullptr) {

        return Status::InternalError("failed to find tablet schema for {}", _req.index_id);

    }

    RETURN_IF_ERROR(_build_current_tablet_schema(_req.index_id, _req.table_schema_param.get(),

                                                 *_streams[0]->tablet_schema(_req.index_id)));

    RowsetWriterContext context;

    context.txn_id = _req.txn_id;

    context.load_id = _req.load_id;

    context.index_id = _req.index_id;

    context.partition_id = _req.partition_id;

    context.rowset_state = PREPARED;

    context.segments_overlap = OVERLAPPING;

    context.tablet_schema = _tablet_schema;

    context.newest_write_timestamp = UnixSeconds();

    context.tablet = nullptr;

    context.write_type = DataWriteType::TYPE_DIRECT;

    context.tablet_id = _req.tablet_id;

    context.partition_id = _req.partition_id;

    context.tablet_schema_hash = _req.schema_hash;

    context.enable_unique_key_merge_on_write = _streams[0]->enable_unique_mow(_req.index_id);

    context.rowset_type = RowsetTypePB::BETA_ROWSET;

    context.rowset_id = ExecEnv::GetInstance()->storage_engine().next_rowset_id();

    context.data_dir = nullptr;

    context.partial_update_info = _partial_update_info;

    context.memtable_on_sink_support_index_v2 = true;

    context.encrypt_algorithm = EncryptionAlgorithmPB::PLAINTEXT;

    _rowset_writer = std::make_shared<BetaRowsetWriterV2>(_streams);

    RETURN_IF_ERROR(_rowset_writer->init(context));

    std::shared_ptr<WorkloadGroup> wg_sptr = nullptr;

    if (_state->get_query_ctx()) {

        wg_sptr = _state->get_query_ctx()->workload_group();

    }

    RETURN_IF_ERROR(_memtable_writer->init(_rowset_writer, _tablet_schema, _partial_update_info,

                                           wg_sptr, _streams[0]->enable_unique_mow(_req.index_id)));

    ExecEnv::GetInstance()->memtable_memory_limiter()->register_writer(_memtable_writer);

    _is_init = true;

    _streams.clear();

    return Status::OK();

}

Status DeltaWriterV2::write(const Block* block, const DorisVector<uint32_t>& row_idxs) {

    if (UNLIKELY(row_idxs.empty())) {

        return Status::OK();

    }

    _lock_watch.start();

    std::lock_guard<std::mutex> l(_lock);

    _lock_watch.stop();

    if (!_is_init && !_is_cancelled) {

        RETURN_IF_ERROR(init());

    }

    {

        SCOPED_RAW_TIMER(&_wait_flush_limit_time);

        auto memtable_flush_running_count_limit = config::memtable_flush_running_count_limit;

        DBUG_EXECUTE_IF("DeltaWriterV2.write.back_pressure",

                        { std::this_thread::sleep_for(std::chrono::milliseconds(10 * 1000)); });

        while (_memtable_writer->flush_running_count() >= memtable_flush_running_count_limit) {

            if (_state->is_cancelled()) {

                return _state->cancel_reason();

            }

            std::this_thread::sleep_for(std::chrono::milliseconds(10));

        }

    }

    SCOPED_RAW_TIMER(&_write_memtable_time);

    return _memtable_writer->write(block, row_idxs);

}

Status DeltaWriterV2::close() {

    _lock_watch.start();

    std::lock_guard<std::mutex> l(_lock);

    _lock_watch.stop();

    if (!_is_init && !_is_cancelled) {

        // if this delta writer is not initialized, but close() is called.

        // which means this tablet has no data loaded, but at least one tablet

        // in same partition has data loaded.

        // so we have to also init this DeltaWriterV2, so that it can create an empty rowset

        // for this tablet when being closed.

        RETURN_IF_ERROR(init());

    }

    return _memtable_writer->close();

}

Status DeltaWriterV2::close_wait(int32_t& num_segments, RuntimeProfile* profile) {

    SCOPED_RAW_TIMER(&_close_wait_time);

    std::lock_guard<std::mutex> l(_lock);

    DCHECK(_is_init)

            << "delta writer is supposed be to initialized before close_wait() being called";

    if (profile != nullptr) {

        _update_profile(profile);

    }

    RETURN_IF_ERROR(_memtable_writer->close_wait(profile));

    num_segments = _rowset_writer->next_segment_id();

    _delta_written_success = true;

    return Status::OK();

}

Status DeltaWriterV2::cancel() {

    return cancel_with_status(Status::Cancelled("already cancelled"));

}

Status DeltaWriterV2::cancel_with_status(const Status& st) {

    std::lock_guard<std::mutex> l(_lock);

    if (_is_cancelled) {

        return Status::OK();

    }

    RETURN_IF_ERROR(_memtable_writer->cancel_with_status(st));

    _is_cancelled = true;

    return Status::OK();

}

Status DeltaWriterV2::_build_current_tablet_schema(int64_t index_id,

                                                   const OlapTableSchemaParam* table_schema_param,

                                                   const TabletSchema& ori_tablet_schema) {

    _tablet_schema->copy_from(ori_tablet_schema);

    // find the right index id

    int i = 0;

    auto indexes = table_schema_param->indexes();

    for (; i < indexes.size(); i++) {

        if (indexes[i]->index_id == index_id) {

            break;

        }

    }

    if (!indexes.empty() && !indexes[i]->columns.empty() &&

        indexes[i]->columns[0]->unique_id() >= 0) {

        _tablet_schema->build_current_tablet_schema(

                index_id, static_cast<int32_t>(table_schema_param->version()), indexes[i],

                ori_tablet_schema);

    }

    _tablet_schema->set_table_id(table_schema_param->table_id());

    _tablet_schema->set_db_id(table_schema_param->db_id());

    if (table_schema_param->is_partial_update()) {

        _tablet_schema->set_auto_increment_column(table_schema_param->auto_increment_coulumn());

    }

    // set partial update columns info

    _partial_update_info = std::make_shared<PartialUpdateInfo>();

    RETURN_IF_ERROR(_partial_update_info->init(

            _req.tablet_id, _req.txn_id, *_tablet_schema,

            table_schema_param->unique_key_update_mode(),

            table_schema_param->partial_update_new_key_policy(),

            table_schema_param->partial_update_input_columns(),

            table_schema_param->is_strict_mode(), table_schema_param->timestamp_ms(),

            table_schema_param->nano_seconds(), table_schema_param->timezone(),

            table_schema_param->auto_increment_coulumn()));

    return Status::OK();

}

} // namespace doris