// 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 "olap/rowset/rowset.h"

#include <gen_cpp/olap_file.pb.h>

#include "olap/olap_define.h"

#include "olap/segment_loader.h"

#include "olap/tablet_schema.h"

#include "util/time.h"

#include "util/trace.h"

namespace doris {

static bvar::Adder<size_t> g_total_rowset_num("doris_total_rowset_num");

Rowset::Rowset(const TabletSchemaSPtr& schema, RowsetMetaSharedPtr rowset_meta,

               std::string tablet_path)

        : _rowset_meta(std::move(rowset_meta)),

          _tablet_path(std::move(tablet_path)),

          _refs_by_reader(0) {

#ifndef BE_TEST

    DCHECK(!is_local() || !_tablet_path.empty()); // local rowset MUST has tablet path

#endif

    _is_pending = true;

    // Generally speaking, as long as a rowset has a version, it can be considered not to be in a pending state.

    // However, if the rowset was created through ingesting binlogs, it will have a version but should still be

    // considered in a pending state because the ingesting txn has not yet been committed.

    if (_rowset_meta->has_version() && _rowset_meta->start_version() > 0 &&

        _rowset_meta->rowset_state() != COMMITTED) {

        _is_pending = false;

    }

    if (_is_pending) {

        _is_cumulative = false;

    } else {

        Version version = _rowset_meta->version();

        _is_cumulative = version.first != version.second;

    }

    // build schema from RowsetMeta.tablet_schema or Tablet.tablet_schema

    _schema = _rowset_meta->tablet_schema() ? _rowset_meta->tablet_schema() : schema;

    g_total_rowset_num << 1;

}

Rowset::~Rowset() {

    g_total_rowset_num << -1;

}

Status Rowset::load(bool use_cache) {

    // if the state is ROWSET_UNLOADING it means close() is called

    // and the rowset is already loaded, and the resource is not closed yet.

    if (_rowset_state_machine.rowset_state() == ROWSET_LOADED) {

        return Status::OK();

    }

    {

        // before lock, if rowset state is ROWSET_UNLOADING, maybe it is doing do_close in release

        std::lock_guard load_lock(_lock);

        // after lock, if rowset state is ROWSET_UNLOADING, it is ok to return

        if (_rowset_state_machine.rowset_state() == ROWSET_UNLOADED) {

            // first do load, then change the state

            RETURN_IF_ERROR(do_load(use_cache));

            RETURN_IF_ERROR(_rowset_state_machine.on_load());

        }

    }

    // load is done

    VLOG_CRITICAL << "rowset is loaded. " << rowset_id()

                  << ", rowset version:" << rowset_meta()->version()

                  << ", state from ROWSET_UNLOADED to ROWSET_LOADED. tabletid:"

                  << _rowset_meta->tablet_id();

    return Status::OK();

}

void Rowset::make_visible(Version version) {

    _is_pending = false;

    _rowset_meta->set_version(version);

    _rowset_meta->set_rowset_state(VISIBLE);

    // update create time to the visible time,

    // it's used to skip recently published version during compaction

    _rowset_meta->set_creation_time(UnixSeconds());

    if (_rowset_meta->has_delete_predicate()) {

        _rowset_meta->mutable_delete_predicate()->set_version(version.first);

    }

}

void Rowset::set_version(Version version) {

    _rowset_meta->set_version(version);

}

bool Rowset::check_rowset_segment() {

    std::lock_guard load_lock(_lock);

    return check_current_rowset_segment();

}

std::string Rowset::get_rowset_info_str() {

    std::string disk_size = PrettyPrinter::print(

            static_cast<uint64_t>(_rowset_meta->total_disk_size()), TUnit::BYTES);

    return fmt::format("[{}-{}] {} {} {} {} {}", start_version(), end_version(), num_segments(),

                       _rowset_meta->has_delete_predicate() ? "DELETE" : "DATA",

                       SegmentsOverlapPB_Name(_rowset_meta->segments_overlap()),

                       rowset_id().to_string(), disk_size);

}

void Rowset::clear_cache() {

    {

        SCOPED_SIMPLE_TRACE_IF_TIMEOUT(std::chrono::seconds(1));

        SegmentLoader::instance()->erase_segments(rowset_id(), num_segments());

    }

    {

        SCOPED_SIMPLE_TRACE_IF_TIMEOUT(std::chrono::seconds(1));

        clear_inverted_index_cache();

    }

}

Result<std::string> Rowset::segment_path(int64_t seg_id) {

    if (is_local()) {

        return local_segment_path(_tablet_path, _rowset_meta->rowset_id().to_string(), seg_id);

    }

    return _rowset_meta->remote_storage_resource().transform([=, this](auto&& storage_resource) {

        return storage_resource->remote_segment_path(_rowset_meta->tablet_id(),

                                                     _rowset_meta->rowset_id().to_string(), seg_id);

    });

}

Status check_version_continuity(const std::vector<RowsetSharedPtr>& rowsets) {

    if (rowsets.size() < 2) {

        return Status::OK();

    }

    auto prev = rowsets.begin();

    for (auto it = rowsets.begin() + 1; it != rowsets.end(); ++it) {

        if ((*prev)->end_version() + 1 != (*it)->start_version()) {

            return Status::InternalError("versions are not continuity: prev={} cur={}",

                                         (*prev)->version().to_string(),

                                         (*it)->version().to_string());

        }

        prev = it;

    }

    return Status::OK();

}

void Rowset::merge_rowset_meta(const RowsetMeta& other) {

    _rowset_meta->merge_rowset_meta(other);

    // rowset->meta_meta()->tablet_schema() maybe updated so make sure _schema is

    // consistent with rowset meta

    _schema = _rowset_meta->tablet_schema();

}

} // namespace doris