// 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/adjust_log_level.h"

#include <tuple>

#include "common/logging.h"

#include "service/http/http_channel.h"

#include "service/http/http_request.h"

#include "util/string_util.h"

namespace doris {

// **Note**: If the module_name does not exist in the vlog modules, vlog

// would create corresponding module for it.

Result<std::tuple<std::string, int, int>> handle_request(HttpRequest* req) {

    auto parse_param = [&req](std::string param) {

        const auto& value = req->param(param);

        if (value.empty()) {

            auto error_msg = fmt::format("parameter {} not specified in url.", param);

            throw std::runtime_error(error_msg);

        }

        return value;

    };

    const auto& module = parse_param("module");

    const auto& level = parse_param("level");

    auto result = safe_stoi(level, "level");

    if (result.has_value()) {

        return std::make_tuple(module, google::SetVLOGLevel(module.c_str(), result.value()),

                               result.value());

    } else {

        return unexpected(std::move(result).error());

    }

}

void AdjustLogLevelAction::handle(HttpRequest* req) {

    try {

        auto handle_result = handle_request(req);

        if (handle_result.has_value()) {

            auto msg = fmt::format(

                    "adjust vlog of {} from {} to {} succeed", std::get<0>(handle_result.value()),

                    std::get<1>(handle_result.value()), std::get<2>(handle_result.value()));

            LOG(INFO) << msg;

            HttpChannel::send_reply(req, msg);

        } else {

            LOG(WARNING) << "adjust log level failed, error: " << handle_result.error();

            HttpChannel::send_reply(req, HttpStatus::INTERNAL_SERVER_ERROR,

                                    handle_result.error().to_string_no_stack());

            return;

        }

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

        LOG(WARNING) << "adjust log level failed, error: " << e.what();

        HttpChannel::send_reply(req, HttpStatus::INTERNAL_SERVER_ERROR, e.what());

        return;

    }

}

} // namespace doris