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" });

exports.formats = formats;

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

exports.datetime = datetime;

exports.getClientTimezone = ctx => {
    if (ctx.header['x-client-timezone'] !== undefined)
        return ctx.header['x-client-timezone'];
    else
        return "UTC";
};

exports.getServiceByHost = (host, service="") => {
    if (host.endsWith("onion"))
        switch (service) {
            case "radio": return "http://wsmkgnmhmzqm7kyzv7jnzzafvgm7xlmlfvzhgorpapd5or2arnhuktqd.onion";
            case "files": return "http://qf5e43nlhvnrutmikuvbdfj3cmtthokpbaxtkm6mjlslttzvtgm4fxid.onion";
            default: return "http://moq7aejnf4xk5k2bkaltli3ftkhusy2mbrd3pj23nrca343ku2mgk4yd.onion";
        }
    else if (host.endsWith("i2p"))
        switch (service) {
            case "radio": return "http://radio.arav.i2p";
            case "files": return "http://files.arav.i2p";
            default: return "http://arav.i2p";
        }
    else
        switch (service) {
            case "radio": return "https://radio.arav.top";
            case "files": return "https://files.arav.top";
            default: return "https://arav.top";
        }
}

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

// This code was taken from https://www.npmjs.com/package/mysql#custom-format
// Only fourth line was changed.
exports.mysqlQueryFormat = function (query, values) {
	if (!values) return query;
	return query.replace(/\:(\w+)/g, function (txt, key) {
		if (values[key] !== undefined)
			return this.escape(values[key]);
		return txt;
	}.bind(this));
};