'use strict';

exports = module.exports = {
    getServerIPv4,
    getServerIPv6,
    testConfig
};

const assert = require('assert'),
    BoxError = require('../boxerror.js'),
    net = require('net');

async function getServerIPv4(config) {
    assert.strictEqual(typeof config, 'object');

    return config.ip;
}

async function getServerIPv6(config) {
    assert.strictEqual(typeof config, 'object');

    return config.ipv6;
}

async function testConfig(config) {
    assert.strictEqual(typeof config, 'object');

    if (typeof config.ip !== 'string') return new BoxError(BoxError.BAD_FIELD, 'ipv4 must be a string');
    if (!net.isIPv4(config.ip)) return new BoxError(BoxError.BAD_FIELD, 'ip is not a valid ipv4');

    if ('ipv6' in config) {
        if (typeof config.ipv6 !== 'string') return new BoxError(BoxError.BAD_FIELD, 'ipv6 must be a string');
        if (!net.isIPv6(config.ipv6)) return new BoxError(BoxError.BAD_FIELD, 'ipv6 is not a valid ipv6');
    }

    return null;
}