const config = require('config');
const fs = require('fs');
const https = require('https');
const path = require('path');

exports.getCreate = function(req, res) {
  // render view
  res.render('create');
};

exports.postCreate = function(req, res) {
  mcDir = config.get('server_directory');
  serverDir = path.join(mcDir, req.body.serverName);

  // make server directory
  fs.mkdirSync(serverDir);

  // grab the server JAR file
  serverJarUrl = 'https://piston-data.mojang.com/v1/objects/f69c284232d7c7580bd89a5a4931c3581eae1378/server.jar';
  serverJarName = "server_" + req.body.serverVersion + ".jar";
  serverJarPath = path.join(serverDir, serverJarName);
  https.get(serverJarUrl, (res) => {
    const filePath = fs.createWriteStream(serverJarPath);
    res.pipe(filePath);
    filePath.on('finish', () => {
      filePath.close();
      console.log('Download Completed'); 
    });
  });

  // create the start.sh shell script
  scriptFilePath = path.join(serverDir, 'start.sh');
  scriptContent = "#!/bin/sh\n\ncd " + serverDir + "\njava -Xmx2048M -Xms2048M -jar server_" + req.body.serverVersion + ".jar nogui";
  fs.writeFileSync(scriptFilePath, scriptContent);
  fs.chmodSync(scriptFilePath, 0o755);

  // save the current version to a text file - this will hopefully be temporary solution
  versionFilePath = path.join(serverDir, 'current_version.txt');
  versionContent = req.body.serverVersion;
  fs.writeFileSync(versionFilePath, versionContent);
  fs.chmodSync(versionFilePath, 0o644);

  // redirect the user back to the home page
  res.redirect('/');
};