const MSE = require("mse-translator")
const https = require('https');
const fs = require('fs');
const archiver = require('archiver');

const urlReq = function(reqUrl, options, cb){
    if(typeof options === "function"){ cb = options; options = {}; }// incase no options passed in
    https.get(reqUrl,(res) => {
        let body = "";
        res.on("data", (chunk) => {body += chunk;});
        res.on("end", () => {
            try {
                cb(body, res);
            } catch (error) {
                console.error(error.message);
            };
        });
    }).on("error", (error) => {
        console.error(error.message);
    });
}

let piston = "https://piston-meta.mojang.com/mc/game/version_manifest_v2.json";
let resources = "https://resources.download.minecraft.net/"
let baselang = "en_gb"
urlReq(piston, function(body, res){
    json = JSON.parse(body)
    console.log(`Using base language "${baselang}" from version (${json.versions[0].id})`)

    urlReq(json.versions[1].url, function(body, res){
        json = JSON.parse(body)
        //console.log(json.assetIndex)

        urlReq(json.assetIndex.url, function(body, res){
            json = JSON.parse(body)
            hash = json.objects[`minecraft/lang/${baselang}.json`].hash
            urlReq(resources+`${hash.substring(0,2)}/${hash}`, function(body, res){
                pack = JSON.parse(body)
                //console.log(body.substring(0,200))
                var totals = {total:Object.keys(pack).length,translated:0}
                console.log(`Translating ${totals.total} strings`)
                Object.keys(pack).forEach(function(key){
                var translated = MSE.translate(
                    pack[key]
                    .replace(/\%s/gi, "%_") //mc patch 
                    .replace(/\$s/gi, "$_")
                )
                    .replace(/\%_/gi, "%s") //mc patch back
                    .replace(/\$_/gi, "$s")
                    if (translated != pack[key]) {totals.translated = totals.translated+1}
                    pack[key] = translated
                });
                console.log(`Translated ${totals.translated} out of ${totals.total} strings`)
                //console.log(pack)
                //fs.writeFile('myjsonfile.json', JSON.stringify(pack), 'utf8');
                fs.writeFile (__dirname + "/template/assets/minecraft/lang/en_mse.json", JSON.stringify(pack,null,4), 'utf8',function(err) {
                    if (err) throw err;
                    console.log('en_mse.json generated, creating pack and compressing.');
                    const output = fs.createWriteStream(__dirname + '/Maoist-Standard-English.zip');
                        const archive = archiver('zip', {
                        zlib: { level: 9 } // Sets the compression level.
                    });
                    archive.on('error', function(err) {throw err;});
                    output.on('close', function() {
                        console.log("language-pack archive generated with a filesize of " + archive.pointer() + ' bytes');
                    });
                    archive.pipe(output);
                    archive.directory('template/', false);
                    archive.finalize();
                });
            });
        });
    });
});