/**
 * Copyright (C) 2018 MongoDB Inc.
 *
 * This program is free software: you can redistribute it and/or  modify
 * it under the terms of the GNU Affero General Public License, version 3,
 * as published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 * As a special exception, the copyright holders give permission to link the
 * code of portions of this program with the OpenSSL library under certain
 * conditions as described in each individual source file and distribute
 * linked combinations including the program with the OpenSSL library. You
 * must comply with the GNU Affero General Public License in all respects
 * for all of the code used other than as permitted herein. If you modify
 * file(s) with this exception, you may extend this exception to your
 * version of the file(s), but you are not obligated to do so. If you do not
 * wish to do so, delete this exception statement from your version. If you
 * delete this exception statement from all source files in the program,
 * then also delete it in the license file.
 */

#define MONGO_LOG_DEFAULT_COMPONENT ::mongo::logger::LogComponent::kFTDC


#include "mongo/platform/basic.h"

#include "mongo/db/free_mon/free_mon_options.h"

#include "mongo/base/error_codes.h"
#include "mongo/base/initializer_context.h"
#include "mongo/base/status.h"
#include "mongo/base/status_with.h"
#include "mongo/base/string_data.h"
#include "mongo/util/log.h"
#include "mongo/util/options_parser/startup_option_init.h"
#include "mongo/util/options_parser/startup_options.h"

namespace mongo {

FreeMonParams globalFreeMonParams;

namespace optionenvironment {
class OptionSection;
class Environment;
}  // namespace optionenvironment

namespace moe = mongo::optionenvironment;

namespace {

constexpr StringData kEnableCloudState_on = "on"_sd;
constexpr StringData kEnableCloudState_off = "off"_sd;
constexpr StringData kEnableCloudState_runtime = "runtime"_sd;

StatusWith<EnableCloudStateEnum> EnableCloudState_parse(StringData value) {
    if (value == kEnableCloudState_on) {
        return EnableCloudStateEnum::kOn;
    }
    if (value == kEnableCloudState_off) {
        return EnableCloudStateEnum::kOff;
    }
    if (value == kEnableCloudState_runtime) {
        return EnableCloudStateEnum::kRuntime;
    }

    return Status(ErrorCodes::InvalidOptions, "Unrecognized state");
}

Status addFreeMonitoringOptions(moe::OptionSection* options) {
    moe::OptionSection freeMonitoringOptions("Free Monitoring options");

    // Command Line: --enableFreeMonitoring=<on|runtime|off>
    // YAML Name: cloud.monitoring.free=<on|runtime|off>
    freeMonitoringOptions.addOptionChaining("cloud.monitoring.free.state",
                                            "enableFreeMonitoring",
                                            moe::String,
                                            "Enable Cloud Free Monitoring (on|runtime|off)");

    // Command Line: --enableFreeMonitoringTag=array<string>
    // YAML Name: cloud.monitoring.free.tag=array<string>
    freeMonitoringOptions.addOptionChaining("cloud.monitoring.free.tags",
                                            "freeMonitoringTag",
                                            moe::StringVector,
                                            "Cloud Free Monitoring Tags");

    Status ret = options->addSection(freeMonitoringOptions);
    if (!ret.isOK()) {
        error() << "Failed to add free monitoring option section: " << ret.toString();
        return ret;
    }

    return Status::OK();
}

Status storeFreeMonitoringOptions(const moe::Environment& params) {

    if (params.count("cloud.monitoring.free.state")) {
        auto swState =
            EnableCloudState_parse(params["cloud.monitoring.free.state"].as<std::string>());
        if (!swState.isOK()) {
            return swState.getStatus();
        }
        globalFreeMonParams.freeMonitoringState = swState.getValue();
    }

    if (params.count("cloud.monitoring.free.tags")) {
        globalFreeMonParams.freeMonitoringTags =
            params["cloud.monitoring.free.tags"].as<std::vector<std::string>>();
    }

    return Status::OK();
}

MONGO_MODULE_STARTUP_OPTIONS_REGISTER(FreeMonitoringOptions)(InitializerContext* /*unused*/) {
    return addFreeMonitoringOptions(&moe::startupOptions);
}

MONGO_STARTUP_OPTIONS_STORE(FreeMonitoringOptions)(InitializerContext* /*unused*/) {
    return storeFreeMonitoringOptions(moe::startupOptionsParsed);
}

}  // namespace
}  // namespace mongo