#!/usr/bin/env node

'use strict';

var dgram = require('dgram'),
    fs = require('fs'),
    path = require('path'),
    mkdirp = require('mkdirp'),
    parser = require('nsyslog-parser');

const LOG_FILE_FOLDER = '/home/yellowtent/platformdata/logs';
const LOG_FILE_NAME = 'app.log';
const PORT = 2514; // syslog is 514 so we prefix with 2

const argv = require('yargs').argv;

if (argv.version) {
    console.log('1.0.0');
    process.exit(0);
}

console.log();
console.log('==========================================');
console.log('          Cloudron Syslog Daemon          ');
console.log('==========================================');
console.log();
console.log(' Log Folder:  ', LOG_FILE_FOLDER);
console.log(' UDP Port:    ', PORT);
console.log();
console.log('==========================================');
console.log();

var server = dgram.createSocket('udp4');

server.on('error', function (error) {
    console.error('Error:', error);
}).on('listening', function () {
    console.log('Listening...');
}).on('message', function (msg, rinfo) {
    var info = parser(msg.toString());

    if (!info || !info.appName) return console.log('Ignore unknown app log:', msg.toString());

    const filePath = path.join(LOG_FILE_FOLDER, info.appName);
    const fileName = path.join(filePath, LOG_FILE_NAME);

    try {
        mkdirp.sync(filePath);
        fs.appendFileSync(fileName, info.ts.toISOString() + ' ' + info.message);
    } catch (error) {
        console.error(error);
    }
}).bind(PORT);