#! /usr/bin/env runjs

var main = function() {
    var files = __.rfile.from('.').file().listFiles();
    for (var i = 0; i < files.length; i++) {
        var f = files[i];
        if (!f.name.endsWith('.mp4')) {
            continue;
        }
        var lastDotIndex = f.name.lastIndexOf('.');
        if (lastDotIndex < 0) {
            continue;
        }
        var filename = f.name.substring(0, lastDotIndex);
        var isAllHex = /^[0-9A-Fa-f]+$/.test(filename);
        var newFilename;
        if (isAllHex) {
            newFilename = __.bytes.fromHex(filename).toString() + '.mp4';
        } else {
            newFilename = __.bytes.from(filename).asHex() + '.mp4';
        }
        xprintln('[INFO] File: ' + filename, '->', newFilename);
        f.renameTo(__.rfile.from('./' + newFilename).file());
    }
};

main();