/*
	Spacebar: A FOSS re-implementation and extension of the Discord.com backend.
	Copyright (C) 2023 Spacebar and Spacebar Contributors
	
	This program is free software: you can redistribute it and/or modify
	it under the terms of the GNU Affero General Public License as published
	by the Free Software Foundation, either version 3 of the License, or
	(at your option) any later version.
	
	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 <https://www.gnu.org/licenses/>.
*/

import { Config, IpDataClient } from "@spacebar/util";
import { distanceBetweenLocations } from "../utility/ipAddress";

export async function getVoiceRegions(ipAddress: string, vip: boolean) {
    const regions = Config.get().regions;
    const availableRegions = regions.available.filter((ar) => (vip ? true : !ar.vip));
    let optimalId = regions.default;

    if (!regions.useDefaultAsOptimal) {
        const clientIpAnalysis = await IpDataClient.getIpInfo(ipAddress);

        let min = Number.POSITIVE_INFINITY;

        for (const ar of availableRegions) {
            //TODO the endpoint location should be saved in the database if not already present to prevent IPAnalysis call
            const dist = distanceBetweenLocations(clientIpAnalysis!, ar.location || (await IpDataClient.getIpInfo(ar.endpoint))!);

            if (dist < min) {
                min = dist;
                optimalId = ar.id;
            }
        }
    }

    return availableRegions.map((ar) => ({
        id: ar.id,
        name: ar.name,
        custom: ar.custom,
        deprecated: ar.deprecated,
        optimal: ar.id === optimalId,
    }));
}