// 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 "cloud/cloud_rowset_builder.h"

#include "cloud/cloud_meta_mgr.h"

#include "cloud/cloud_storage_engine.h"

#include "cloud/cloud_tablet.h"

#include "cloud/cloud_tablet_mgr.h"

#include "storage/storage_policy.h"

namespace doris {

using namespace ErrorCode;

CloudRowsetBuilder::CloudRowsetBuilder(CloudStorageEngine& engine, const WriteRequest& req,

                                       RuntimeProfile* profile)

        : BaseRowsetBuilder(req, profile), _engine(engine) {}

CloudRowsetBuilder::~CloudRowsetBuilder() {

    // Clear file cache immediately when load fails

    if (_is_init && _rowset != nullptr && _rowset->rowset_meta()->rowset_state() == PREPARED) {

        _rowset->clear_cache();

    }

}

Status CloudRowsetBuilder::init() {

    _tablet = DORIS_TRY(_engine.get_tablet(_req.tablet_id));

    std::shared_ptr<MowContext> mow_context;

    if (_tablet->enable_unique_key_merge_on_write()) {

        if (config::cloud_mow_sync_rowsets_when_load_txn_begin) {

            auto st = std::static_pointer_cast<CloudTablet>(_tablet)->sync_rowsets();

            // sync_rowsets will return INVALID_TABLET_STATE when tablet is under alter

            if (!st.ok() && !st.is<ErrorCode::INVALID_TABLET_STATE>()) {

                return st;

            }

        }

        RETURN_IF_ERROR(init_mow_context(mow_context));

    }

    RETURN_IF_ERROR(check_tablet_version_count());

    using namespace std::chrono;

    std::static_pointer_cast<CloudTablet>(_tablet)->last_load_time_ms =

            duration_cast<milliseconds>(system_clock::now().time_since_epoch()).count();

    // build tablet schema in request level

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

                                                 *_tablet->tablet_schema()));

    RowsetWriterContext context;

    context.txn_id = _req.txn_id;

    context.txn_expiration = _req.txn_expiration;

    context.load_id = _req.load_id;

    context.rowset_state = PREPARED;

    context.segments_overlap = OVERLAPPING;

    context.tablet_schema = _tablet_schema;

    context.newest_write_timestamp = UnixSeconds();

    context.tablet_id = _req.tablet_id;

    context.index_id = _req.index_id;

    context.tablet = _tablet;

    context.write_type = DataWriteType::TYPE_DIRECT;

    context.mow_context = mow_context;

    context.write_file_cache = _req.write_file_cache;

    context.partial_update_info = _partial_update_info;

    context.file_cache_ttl_sec = _tablet->ttl_seconds();

    context.storage_resource = _engine.get_storage_resource(_req.storage_vault_id);

    if (!context.storage_resource) {

        return Status::InternalError("vault id not found, maybe not sync, vault id {}",

                                     _req.storage_vault_id);

    }

    _rowset_writer = DORIS_TRY(_tablet->create_rowset_writer(context, false));

    _calc_delete_bitmap_token = _engine.calc_delete_bitmap_executor()->create_token();

    if (!_skip_writing_rowset_metadata) {

        RETURN_IF_ERROR(_engine.meta_mgr().prepare_rowset(*_rowset_writer->rowset_meta(), ""));

    }

    _is_init = true;

    return Status::OK();

}

Status CloudRowsetBuilder::check_tablet_version_count() {

    int64_t version_count = cloud_tablet()->fetch_add_approximate_num_rowsets(0);

    DBUG_EXECUTE_IF("RowsetBuilder.check_tablet_version_count.too_many_version",

                    { version_count = INT_MAX; });

    // TODO(plat1ko): load backoff algorithm

    int32_t max_version_config = cloud_tablet()->max_version_config();

    if (version_count > max_version_config) {

        return Status::Error<TOO_MANY_VERSION>(

                "failed to init rowset builder. version count: {}, exceed limit: {}, "

                "tablet: {}. Please reduce the frequency of loading data or adjust the "

                "max_tablet_version_num or time_series_max_tablet_version_numin be.conf to a "

                "larger value.",

                version_count, max_version_config, _tablet->tablet_id());

    }

    return Status::OK();

}

void CloudRowsetBuilder::update_tablet_stats() {

    auto* tablet = cloud_tablet();

    DCHECK(tablet);

    DCHECK(_rowset);

    tablet->fetch_add_approximate_num_rowsets(1);

    tablet->fetch_add_approximate_num_segments(_rowset->num_segments());

    tablet->fetch_add_approximate_num_rows(_rowset->num_rows());

    tablet->fetch_add_approximate_data_size(_rowset->total_disk_size());

    tablet->fetch_add_approximate_cumu_num_rowsets(1);

    tablet->fetch_add_approximate_cumu_num_deltas(_rowset->num_segments());

    tablet->write_count.fetch_add(1, std::memory_order_relaxed);

}

CloudTablet* CloudRowsetBuilder::cloud_tablet() {

    return static_cast<CloudTablet*>(_tablet.get());

}

const RowsetMetaSharedPtr& CloudRowsetBuilder::rowset_meta() {

    return _rowset_writer->rowset_meta();

}

Status CloudRowsetBuilder::set_txn_related_info() {

    if (_tablet->enable_unique_key_merge_on_write()) {

        // For empty rowsets when skip_writing_empty_rowset_metadata=true,

        // store only a lightweight marker instead of full rowset info.

        // This allows CalcDeleteBitmapTask to detect and skip gracefully,

        // while using minimal memory (~16 bytes per entry).

        if (_skip_writing_rowset_metadata) {

            _engine.txn_delete_bitmap_cache().mark_empty_rowset(_req.txn_id, _tablet->tablet_id(),

                                                                _req.txn_expiration);

            return Status::OK();

        }

        if (config::enable_merge_on_write_correctness_check && _rowset->num_rows() != 0) {

            auto st = _tablet->check_delete_bitmap_correctness(

                    _delete_bitmap, _rowset->end_version() - 1, _req.txn_id, *_rowset_ids);

            if (!st.ok()) {

                LOG(WARNING) << fmt::format(

                        "[tablet_id:{}][txn_id:{}][load_id:{}][partition_id:{}] "

                        "delete bitmap correctness check failed in commit phase!",

                        _req.tablet_id, _req.txn_id, UniqueId(_req.load_id).to_string(),

                        _req.partition_id);

                return st;

            }

        }

        _engine.txn_delete_bitmap_cache().set_tablet_txn_info(

                _req.txn_id, _tablet->tablet_id(), _delete_bitmap, *_rowset_ids, _rowset,

                _req.txn_expiration, _partial_update_info);

    } else {

        if (config::enable_cloud_make_rs_visible_on_be) {

            if (_skip_writing_rowset_metadata) {

                _engine.committed_rs_mgr().mark_empty_rowset(_req.txn_id, _tablet->tablet_id(),

                                                             _req.txn_expiration);

            } else {

                _engine.meta_mgr().cache_committed_rowset(rowset_meta(), _req.txn_expiration);

            }

        }

    }

    return Status::OK();

}

} // namespace doris