// 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/tablets_info_action.h"

#include <algorithm>

#include <cstdint>

#include <cstdlib>

#include <limits>

#include <string>

#include <vector>

#include "cloud/cloud_storage_engine.h"

#include "cloud/cloud_tablet_mgr.h"

#include "cloud/config.h"

#include "runtime/exec_env.h"

#include "service/backend_options.h"

#include "service/http/http_channel.h"

#include "service/http/http_headers.h"

#include "service/http/http_request.h"

#include "service/http/http_status.h"

#include "storage/olap_common.h"

#include "storage/storage_engine.h"

#include "storage/tablet/tablet_manager.h"

namespace doris {

const static std::string HEADER_JSON = "application/json";

TabletsInfoAction::TabletsInfoAction(ExecEnv* exec_env, TPrivilegeHier::type hier,

                                     TPrivilegeType::type type)

        : HttpHandlerWithAuth(exec_env, hier, type) {}

void TabletsInfoAction::handle(HttpRequest* req) {

    const std::string& tablet_num_to_return = req->param("limit");

    req->add_output_header(HttpHeaders::CONTENT_TYPE, HEADER_JSON.c_str());

    HttpChannel::send_reply(req, HttpStatus::OK, get_tablets_info(tablet_num_to_return).ToString());

}

EasyJson TabletsInfoAction::get_tablets_info(std::string tablet_num_to_return) {

    EasyJson tablets_info_ej;

    int64_t number;

    std::string msg;

    if (tablet_num_to_return.empty()) {

        number = 1000; // default

        msg = "OK";

    } else if (tablet_num_to_return == "all") {

        number = std::numeric_limits<std::int64_t>::max();

        msg = "OK";

    } else if (std::all_of(tablet_num_to_return.begin(), tablet_num_to_return.end(), ::isdigit)) {

        number = std::atol(tablet_num_to_return.c_str());

        msg = "OK";

    } else {

        number = 0;

        msg = "Parameter Error";

    }

    std::vector<TabletInfo> tablets_info;

    if (!config::is_cloud_mode()) {

        TabletManager* tablet_manager =

                ExecEnv::GetInstance()->storage_engine().to_local().tablet_manager();

        tablet_manager->obtain_specific_quantity_tablets(tablets_info, number);

    } else {

        CloudTabletMgr& cloud_tablet_manager =

                ExecEnv::GetInstance()->storage_engine().to_cloud().tablet_mgr();

        cloud_tablet_manager.get_tablet_info(number, &tablets_info);

    }

    tablets_info_ej["msg"] = msg;

    tablets_info_ej["code"] = 0;

    EasyJson data = tablets_info_ej.Set("data", EasyJson::kObject);

    data["host"] = BackendOptions::get_localhost();

    EasyJson tablets = data.Set("tablets", EasyJson::kArray);

    for (TabletInfo tablet_info : tablets_info) {

        EasyJson tablet = tablets.PushBack(EasyJson::kObject);

        tablet["tablet_id"] = tablet_info.tablet_id;

    }

    tablets_info_ej["count"] = tablets_info.size();

    return tablets_info_ej;

}

} // namespace doris