const moment = require("moment-timezone");

const formats = Object.freeze({
    post_date: "Do MMMM YYYY HH:mm:ss z",
    file_date: "YYYY-MM-DD HH:mm:ss z",
    id_date: "YYYYMMDD-HHmm" });

function getTimezone(ctx) {
    if (ctx.header['x-client-timezone'] !== undefined)
        return ctx.header['x-client-timezone'];
}

function datetime(date, format=formats.post_date, timezone="UTC") {
    return moment.utc(date).tz(timezone).format(format);
}

exports.getBaseHost = (host) => {
    switch (host) {
        case host.endsWith("onion"):
            return `http://moq7aejnf4xk5k2bkaltli3ftkhusy2mbrd3pj23nrca343ku2mgk4yd.onion`;
        case host.endsWith("b32.i2p"):
            return `http://t42fkp6zp5dfqywantq3zp427ig3q2onrmfv246tyaztpg4ckb5a.b32.i2p`;
        default:
            return "https://arav.top";
    }
}

exports.getTimezone = getTimezone;
exports.formats = formats;
exports.datetime = datetime;

exports.rssLink = (proto, host, date, category, timezone="UTC") =>
    `${proto}://${host}/mindflow#${category}-${datetime(date, formats.id_date, timezone)}`;