// 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 "service/http/action/pad_rowset_action.h"

#include <gen_cpp/olap_file.pb.h>

#include <glog/logging.h>

#include <cstdlib>

#include <memory>

#include <mutex>

#include <ostream>

#include <string>

#include <vector>

#include "service/http/http_channel.h"

#include "service/http/http_request.h"

#include "service/http/http_status.h"

#include "storage/olap_common.h"

#include "storage/rowset/rowset.h"

#include "storage/rowset/rowset_writer.h"

#include "storage/rowset/rowset_writer_context.h"

#include "storage/storage_engine.h"

#include "storage/tablet/tablet_manager.h"

#include "util/time.h"

#include "util/trace.h"

namespace doris {

namespace {

const std::string TABLET_ID = "tablet_id";

const std::string START_VERSION = "start_version";

const std::string END_VERSION = "end_version";

Status check_one_param(const std::string& param_val, const std::string& param_name) {

    if (param_val.empty()) {

        return Status::InternalError("paramater {} not specified in url", param_name);

    }

    return Status::OK();

}

Status check_param(HttpRequest* req) {

    RETURN_IF_ERROR(check_one_param(req->param(TABLET_ID), TABLET_ID));

    RETURN_IF_ERROR(check_one_param(req->param(START_VERSION), START_VERSION));

    RETURN_IF_ERROR(check_one_param(req->param(END_VERSION), END_VERSION));

    return Status::OK();

}

} // namespace

void PadRowsetAction::handle(HttpRequest* req) {

    LOG(INFO) << "accept one request " << req->debug_string();

    Status status = _handle(req);

    std::string result = status.to_json();

    LOG(INFO) << "handle request result:" << result;

    if (status.ok()) {

        HttpChannel::send_reply(req, HttpStatus::OK, result);

    } else {

        HttpChannel::send_reply(req, HttpStatus::INTERNAL_SERVER_ERROR, result);

    }

}

Status PadRowsetAction::_handle(HttpRequest* req) {

    RETURN_IF_ERROR(check_param(req));

    const std::string& tablet_id_str = req->param(TABLET_ID);

    const std::string& start_version_str = req->param(START_VERSION);

    const std::string& end_version_str = req->param(END_VERSION);

    // valid str format

    int64_t tablet_id = std::atol(tablet_id_str.c_str());

    int32_t start_version = std::atoi(start_version_str.c_str());

    int32_t end_version = std::atoi(end_version_str.c_str());

    if (start_version < 0 || end_version < 0 || end_version < start_version) {

        return Status::InternalError("Invalid input version");

    }

    auto tablet = _engine.tablet_manager()->get_tablet(tablet_id);

    if (nullptr == tablet) {

        return Status::InternalError("Unknown tablet id {}", tablet_id);

    }

    return _pad_rowset(tablet.get(), Version(start_version, end_version));

}

Status PadRowsetAction::_pad_rowset(Tablet* tablet, const Version& version) {

    if (tablet->check_version_exist(version)) {

        return Status::InternalError("Input version {} exists", version.to_string());

    }

    RowsetWriterContext ctx;

    ctx.version = version;

    ctx.rowset_state = VISIBLE;

    ctx.segments_overlap = NONOVERLAPPING;

    ctx.tablet_schema = tablet->tablet_schema();

    ctx.newest_write_timestamp = UnixSeconds();

    auto writer = DORIS_TRY(tablet->create_rowset_writer(ctx, false));

    RowsetSharedPtr rowset;

    RETURN_IF_ERROR(writer->build(rowset));

    rowset->make_visible(version);

    std::vector<RowsetSharedPtr> to_add {rowset};

    std::vector<RowsetSharedPtr> to_delete;

    {

        std::unique_lock wlock(tablet->get_header_lock());

        SCOPED_SIMPLE_TRACE_IF_TIMEOUT(TRACE_TABLET_LOCK_THRESHOLD);

        RETURN_IF_ERROR(tablet->modify_rowsets(to_add, to_delete));

        tablet->save_meta();

    }

    return Status::OK();

}

} // namespace doris