#! /usr/bin/env runjs
var RFile = Packages.me.hatter.tools.commons.io.RFile;

var REPO = 'https://repo.examp1e.org/';
var HPKP = 'YLh1dUR9y6Kja30RrAn7JKnbQG/uEtLMkBgFF2Fuihg=';

var main = () => {

    var libDir = $$.file('lib').exists()? $$.file('lib'): $$.file('libs');
    if (!libDir.exists()) {
        xprintln('[ERROR] Dir lib or libs not exists!');
        return;
    }

    println('- Load file: ' + REPO + 'files.js');
    var filesJS = $STR($$.httpTool().hpkp(HPKP).url(REPO + 'files.js').read());
    var filesJSON = JSON.parse(filesJS.substring(filesJS.indexOf('[')));
    var filesSha1Map = filesJSON.toMap((e) => {
        return [e[2], e[3]];
    });
    var filesSizeMap = filesJSON.toMap((e) => {
        return [e[2], e[0]];
    });

    var fileUpdated = [];
    $ARRAY(libDir.list()).forEach((f) => {
        var fn = $STR(f);
        var remoteFnSha1 = $STR(filesSha1Map.get(fn));
        if (remoteFnSha1 == null) {
            println('- SKIP file: ' + f);
            return;
        }

        var fi = $$.file(libDir, f);
        var fiSha1 = $STR($$.digests().sha1().digest(RFile.from(fi).bytes()).asHex());

        if (fiSha1 == remoteFnSha1) {
            println('- SHA1 check success: ' + f);
        } else {
            println('+ SHA1 check failed: ' + f);
            println('++ REMOTE:' + remoteFnSha1 + ' LOCAL: ' + fiSha1);
            println('++ Load file from: ' + REPO + f + ', size: ' + filesSizeMap.get(fn));
            var counter = new Packages.me.hatter.tools.commons.io.DefaultRollCounter().prefix('++ Downloading: ');
            var fBytes = $$.httpTool().hpkp(HPKP).url(REPO + f).readBytes(counter);
            var downloadSha1 = $STR($$.digests().sha1().digest(fBytes).asHex());
            if (downloadSha1 == remoteFnSha1) {
                fileUpdated.push(fn + '   - ' + remoteFnSha1);
                RFile.from(fi).write(fBytes);
            } else {
                println('+ ERROR! SHA1 mis-match, Should be: ' + remoteFnSha1 + ', Actural is: ' + downloadSha1);
            }
        }
    });

    if (fileUpdated.length > 0) {
        println();
        println('Total ' + fileUpdated.length + ' file(s) updated:');
        fileUpdated.forEach((f) => {
            println('- ' + f);
        });
    }
};

main();