//
// Generate vor.md from vor.txt by including missing date entries if required
//

require('./static/js/datejs/date-de-DE.js');
Date.i18n.setLanguage('de-DE');
var fs = require('fs');
var fileNameTxt = 'vor.txt';
var fileNameMd = 'vor.md';
try {
    var text = fs.readFileSync(fileNameTxt).toString();
} catch (err) {
    console.log('Problem with reading '+fileNameTxt);
}
const lines = text.split('\n').filter(function(e){return e});
var vor = '| | |  |   \n|:------|:------|:------|\n';
var dat = Date.today();
if (dat.fourth().tuesday() <= dat) {
    dat = (1).months().fromNow();
    dat = dat.fourth().tuesday();
}
for (const line of lines) {
    if (line.length > 0) {
	let seg = line.split('|').filter(function(e){return e});
	let segTrim = [];
	for (s of seg) {
	    segTrim.push(s.trim());
	}
	// See if date present, if not, generate it and insert it at the beginning
	if (segTrim.length == 2) {
	    segTrim.unshift(dat.toString('D'));
	} else {
	    // Hack: add time for UTC offset calculation
	    dat = Date.parse(segTrim[0]+' 03:00');
	}
	let lineNew = '| ' + segTrim.join(' | ') + ' |\n';
	vor += lineNew;
	// Calc next fourth Tuesday
	dat = dat.addMonths(1).fourth().tuesday();
    }
}
try {
    var of = fs.writeFileSync(fileNameMd, vor);
} catch (err) {
    console.log('Problem with writing '+fileNameMd);
}