// 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/meta_action.h"

#include <json2pb/pb_to_json.h>

#include <stdint.h>

#include <cstring>

#include <exception>

#include <memory>

#include <shared_mutex>

#include <sstream>

#include <string>

#include "cloud/config.h"

#include "common/logging.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_define.h"

#include "storage/storage_engine.h"

#include "storage/tablet/tablet.h"

#include "storage/tablet/tablet_manager.h"

#include "storage/tablet/tablet_meta.h"

#include "util/easy_json.h"

namespace doris {

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

const static std::string OP = "op";

const static std::string DATA_SIZE = "data_size";

const static std::string HEADER = "header";

MetaAction::MetaAction(ExecEnv* exec_env, TPrivilegeHier::type hier, TPrivilegeType::type type)

        : HttpHandlerWithAuth(exec_env, hier, type) {}

Status MetaAction::_handle_header(HttpRequest* req, std::string* json_meta) {

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

    std::string req_tablet_id = req->param(TABLET_ID_KEY);

    std::string req_enable_base64 = req->param(ENABLE_BYTE_TO_BASE64);

    uint64_t tablet_id = 0;

    bool enable_byte_to_base64 = false;

    if (std::strcmp(req_enable_base64.c_str(), "true") == 0) {

        enable_byte_to_base64 = true;

    }

    try {

        tablet_id = std::stoull(req_tablet_id);

    } catch (const std::exception& e) {

        LOG(WARNING) << "invalid argument.tablet_id:" << req_tablet_id

                     << ", enable_byte_to_base64: " << req_enable_base64;

        return Status::InternalError("convert failed, {}", e.what());

    }

    auto tablet = DORIS_TRY(ExecEnv::get_tablet(tablet_id));

    std::string operation = req->param(OP);

    if (operation == HEADER) {

        TabletMeta tablet_meta;

        tablet->generate_tablet_meta_copy(tablet_meta, true);

        json2pb::Pb2JsonOptions json_options;

        json_options.pretty_json = true;

        json_options.bytes_to_base64 = enable_byte_to_base64;

        tablet_meta.to_json(json_meta, json_options);

        return Status::OK();

    } else if (operation == DATA_SIZE) {

        if (!config::is_cloud_mode()) {

            EasyJson data_size;

            {

                auto* local_tablet = static_cast<Tablet*>(tablet.get());

                std::shared_lock rowset_ldlock(tablet->get_header_lock());

                data_size["local_data_size"] = local_tablet->tablet_local_size();

                data_size["remote_data_size"] = local_tablet->tablet_remote_size();

            }

            *json_meta = data_size.ToString();

        }

        return Status::OK();

    }

    return Status::InternalError("invalid operation");

}

void MetaAction::handle(HttpRequest* req) {

    std::string json_meta;

    Status status = _handle_header(req, &json_meta);

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

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

    if (status.ok()) {

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

    } else {

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

    }

}

} // end namespace doris