const electron = require('electron');
var fs = require('fs');
// Module to control application life.
const app = electron.app;
// Module to create native browser window.
const BrowserWindow = electron.BrowserWindow;

const path = require('path');
const url = require('url');

// Keep a global reference of the window object, if you don't, the window will
// be closed automatically when the JavaScript object is garbage collected.
let mainWindow;

let serverProc = null;

let isWin = /^win/.test(process.platform);

const createServerProc = () => {
  fs.readdir(path.join(__dirname, 'dist'), (err, files) => {
    var serverPath = null;

    files.forEach((filename) => {
      if(filename.startsWith('exe.')) {
        if (isWin) {
          serverPath = path.join(__dirname, 'dist', filename, 'gns3server.exe');
        }
        else {
          serverPath = path.join(__dirname, 'dist', filename, 'gns3server');
        }

      }
    });

    if (serverPath != null) {
      serverProc = require('child_process').execFile(serverPath, []);

      if (serverProc != null) {
        console.log('gns3server started from path: ' + serverPath);
      }
    }
  });
}

const exitServerProc = () => {
  serverProc.kill();
  serverProc = null;
}


function createWindow () {
  // Create the browser window.
  mainWindow = new BrowserWindow({width: 800, height: 600});

  // and load the index.html of the app.
  mainWindow.loadURL(url.format({
    pathname: path.join(__dirname, 'dist/index.html'),
    protocol: 'file:',
    slashes: true
  }));

  // Open the DevTools.
  // mainWindow.webContents.openDevTools();

  // Emitted when the window is closed.
  mainWindow.on('closed', function () {
    // Dereference the window object, usually you would store windows
    // in an array if your app supports multi windows, this is the time
    // when you should delete the corresponding element.
    mainWindow = null
  });
}

// This method will be called when Electron has finished
// initialization and is ready to create browser windows.
// Some APIs can only be used after this event occurs.
app.on('ready', createWindow);

app.on('ready', createServerProc);
app.on('will-quit', exitServerProc);

// Quit when all windows are closed.
app.on('window-all-closed', function () {
  // On OS X it is common for applications and their menu bar
  // to stay active until the user quits explicitly with Cmd + Q
  if (process.platform !== 'darwin') {
    app.quit()
  }
});

app.on('activate', function () {
  // On OS X it's common to re-create a window in the app when the
  // dock icon is clicked and there are no other windows open.
  if (mainWindow === null) {
    createWindow()
  }
});

// In this file you can include the rest of your app's specific main process
// code. You can also put them in separate files and require them here.