"use strict";

const exec = require('child_process').exec;
const fs = require('fs');

const now = Date.now();
const interval = 24 * 60 * 60 * 1000;
const day_passed = Date.now() % interval;
const diff = interval - day_passed;

function backup_in(time = interval) {
	setTimeout(() => {
		// keep past 2 days
		exec(`mkdir -p backup`);
		fs.readdirSync('backup')
			.sort().slice(0, -2)
			.forEach(file => exec(`rm backup/${file}`));

		// zip and backup
		exec(`tar cfz backup/${Date.now()}-${new Date().toLocaleDateString().replace(/\//g, '-')}.tgz Dawn/config/*`);

		// call itself again in preset interval
		backup_in(interval);
	}, time);
}
backup_in(diff);