#!/usr/bin/env node

/* global it:false */
/* global describe:false */
/* global after:false */

'use strict';

const expect = require('expect.js'),
    fs = require('node:fs'),
    net = require('node:net'),
    path = require('node:path'),
    paths = require('../paths.js'),
    safe = require('safetydance'),
    syslogServer = require('../../syslog.js'),
    timers = require('timers/promises');

async function sendMessage(message) {
    const client = net.createConnection(paths.SYSLOG_SOCKET_FILE);

    return new Promise((resolve, reject) => {
        client.on('connect', function () {
            client.end(message, function (error) {
                if (error) return reject(error);
                resolve();
            });
        });
    });
}

async function verifyMessage(pattern, fileName) {
    // give the server some time to write to disk
    await timers.setTimeout(250);
    const data = fs.readFileSync(path.join(paths.LOG_DIR, fileName), { encoding: 'utf8' });
    const found = data.match(new RegExp(pattern));
    if (found === null) throw new Error(`${pattern} not found in ${fileName}`);
}

describe('Syslog', function () {
    this.timeout(5000);

    after(async function () {
        await syslogServer.stop();
    });

    it('can start', async function () {
        await syslogServer.start();
    });

    it('handle good message', async function () {
        // IETF (RFC 5424) message, with structured data and chained hostnames
        const ietfLine = '<110>1 2009-05-03T14:00:39.529966+02:00 host.example.org/relay.example.org testapp 2138 - [exampleSDID@32473 iut="3" eventSource="Application" eventID="1011"][exampleSDID@32474 iut="4" eventSource="Application" eventID="1012"][ssign VER="0111" RSID="1" SG="0" SPRI="0" GBC="2" FMN="1" CNT="7" HB="K6wzcombEvKJ+UTMcn9bPryAeaU= zrkDcIeaDluypaPCY8WWzwHpPok= zgrWOdpx16ADc7UmckyIFY53icE= XfopJ+S8/hODapiBBCgVQaLqBKg= J67gKMFl/OauTC20ibbydwIlJC8= M5GziVgB6KPY3ERU1HXdSi2vtdw= Wxd/lU7uG/ipEYT9xeqnsfohyH0=" SIGN="AKBbX4J7QkrwuwdbV7Taujk2lvOf8gCgC62We1QYfnrNHz7FzAvdySuMyfM="] BOMAn application event log entry';

        await sendMessage(ietfLine);
        await verifyMessage(/An application event log entry/, 'testapp/app.log');
    });

    it('ignores invalid message', async function () {
        const invalidLine = 'foobar';
        await sendMessage(invalidLine);
        const [error] = await safe(verifyMessage(/foobar/, 'testapp/app.log'));
        expect(error).to.be.ok();
    });

    it('can handle message with colons', async function () {
        // this is what we see from docker syslog
        const message = '<30>1 2018-06-24T22:22:53Z my.test.com testapp 26599 testapp - This: contains two : colons';

        await sendMessage(message);
        await verifyMessage(/This: contains two : colons/, 'testapp/app.log');
    });
});