//main proc for EasyDEX GUI
//this app spawns iguana in background in nontech-mode

const electron = require('electron'),
      app = electron.app,
      BrowserWindow = electron.BrowserWindow,
      path = require('path'),
      url = require('url'),
      os = require('os'),
      spawn = require('child_process').spawn,
      exec = require('child_process').exec,
      fixPath = require('fix-path');
var express = require('express'),
    bodyParser = require('body-parser'),
    fs = require('fs'),
    fsnode = require('fs'),
    fs = require('fs-extra'),
    mkdirp = require('mkdirp'),
    pm2 = require('pm2');

Promise = require('bluebird');

app.setName('Iguana');

if (os.platform() === 'linux') {
  process.env.ELECTRON_RUN_AS_NODE = true;
  console.log(process.env);
}

// GUI APP settings and starting gui on address http://120.0.0.1:17777
var shepherd = require('./routes/shepherd'),
    guiapp = express();

var appConfig = shepherd.loadLocalConfig(); // load app config

// preload.js
const _setImmediate = setImmediate,
      _clearImmediate = clearImmediate;

process.once('loaded', () => {
  global.setImmediate = _setImmediate;
  global.clearImmediate = _clearImmediate;

  if (os.platform() === 'darwin') {
    process.setFdLimit(appConfig.maxDescriptors.darwin);
  }
  if (os.platform() === 'linux') {
    process.setFdLimit(appConfig.maxDescriptors.linux);
  }
});

guiapp.use(bodyParser.json()); // support json encoded bodies
guiapp.use(bodyParser.urlencoded({ extended: true })); // support encoded bodies

guiapp.get('/', function (req, res) {
  res.send('Iguana app server');
});

var guipath = path.join(__dirname, '/gui');
guiapp.use('/gui', express.static(guipath));

guiapp.use('/shepherd', shepherd);

var rungui = guiapp.listen(appConfig.iguanaAppPort, function () {
  console.log('guiapp listening on port ' + appConfig.iguanaAppPort + '!');
});

module.exports = guiapp;
// END GUI App Settings

//require('./assets/js/iguana.js'); //below code shall be separated into asset js for public version
/*
// SELECTING IGUANA BUILD TO RUN AS PER OS DETECTED BY DESKTOP APP
var iguanaOSX = path.join(__dirname, '/assets/bin/osx/iguana');
var iguanaLinux = path.join(__dirname, '/assets/bin/linux64/iguana');
var iguanaWin = path.join(__dirname, '/assets/bin/win64/iguana.exe'); iguanaWin = path.normalize(iguanaWin);
var iguanaConfsDirSrc = path.join(__dirname, '/assets/deps/confs');

// SETTING OS DIR TO RUN IGUANA FROM
// SETTING APP ICON FOR LINUX AND WINDOWS
if (os.platform() === 'darwin') {
  var iguanaDir = process.env.HOME + '/Library/Application Support/iguana';
  var iguanaConfsDir = iguanaDir + '/confs';
}
if (os.platform() === 'linux') {
  var iguanaDir = process.env.HOME + '/.iguana'
  var iguanaConfsDir = iguanaDir + '/confs';
  var iguanaIcon = path.join(__dirname, '/assets/icons/iguana_app_icon_png/128x128.png')
}
if (os.platform() === 'win32') {
  var iguanaDir = process.env.APPDATA + '/iguana'; iguanaDir = path.normalize(iguanaDir)
  var iguanaConfsDir = process.env.APPDATA + '/iguana/confs'; iguanaConfsDir = path.normalize(iguanaConfsDir)
  var iguanaIcon = path.join(__dirname, '/assets/icons/iguana_app_icon.ico')
  iguanaConfsDirSrc = path.normalize(iguanaConfsDirSrc);
}
*/

if (os.platform() === 'linux') {
  var iguanaIcon = path.join(__dirname, '/assets/icons/iguana_app_icon_png/128x128.png');
}
if (os.platform() === 'win32') {
  var iguanaIcon = path.join(__dirname, '/assets/icons/iguana_app_icon.ico');
}

//console.log(iguanaDir);
/*
// MAKE SURE IGUANA DIR IS THERE FOR USER
mkdirp(iguanaDir, function (err) {
  if (err)
    console.error(err)
  else
    fs.readdir(iguanaDir, (err, files) => {
      files.forEach(file => {
        //console.log(file);
      });
    })
});

// COPY CONFS DIR WITH PEERS FILE TO IGUANA DIR, AND KEEP IT IN SYNC
fs.copy(iguanaConfsDirSrc, iguanaConfsDir, function (err) {
  if (err) return console.error(err)
  console.log('confs files copied successfully at: '+ iguanaConfsDir )
})
*/

let mainWindow;
let loadingWindow;

function createLoadingWindow() {
  mainWindow = null;

  // initialise window
  loadingWindow = new BrowserWindow({
    width: 500,
    height: 300,
    frame: false,
    icon: iguanaIcon
  });

  // load our index.html (i.e. easyDEX GUI)
  loadingWindow.loadURL('http://' + appConfig.host + ':' + appConfig.iguanaAppPort + '/gui/');

  // DEVTOOLS - only for dev purposes - ca333
  //loadingWindow.webContents.openDevTools()

  // if window closed we kill iguana proc
  loadingWindow.on('hide', function () {
    // our app does not have multiwindow - so we dereference the window object instead of
    // putting them into an window_arr
    loadingWindow = null;
    createWindow('open');
  })

  //ca333 todo - add os detector to use correct binary - so we can use the same bundle on ALL OS platforms
  /*if (os.platform() === 'win32') {
    process.chdir(iguanaDir);
    //exec(iguanaWin, {cwd: iguanaDir}); //specify binary in startup
    ig = spawn(iguanaWin);
  }
  if (os.platform() === 'linux') {
    process.chdir(iguanaDir);
    ig = spawn(iguanaLinux);
    //corsproxy_process = spawn('corsproxy');
  }
  if (os.platform() === 'darwin') {
    //process.chdir(iguanaDir);
    //ig = spawn(iguanaOSX);
    //corsproxy_process = spawn('corsproxy');
  }*/

  //if (os.platform() !== 'win32') { ig.stderr.on( 'error: ', data => { console.log( `stderr: ${data}` ); }); }
}

app.on('ready', createLoadingWindow);

function createWindow (status) {
  if ( status === 'open') {

    require(path.join(__dirname, 'private/mainmenu'));

    // initialise window
    mainWindow = new BrowserWindow({
      width: 1280,
      height: 800,
      icon: iguanaIcon
    });

    // load our index.html (i.e. easyDEX GUI)
    if (appConfig.edexGuiOnly) {
      mainWindow.loadURL('http://' + appConfig.host + ':' + appConfig.iguanaAppPort + '/gui/EasyDEX-GUI/');
    } else {
      mainWindow.loadURL('http://' + appConfig.host + ':' + appConfig.iguanaAppPort + '/gui/main.html');
    }

    // DEVTOOLS - only for dev purposes - ca333
    //mainWindow.webContents.openDevTools()

    // if window closed we kill iguana proc
    mainWindow.on('closed', function () {
      var ConnectToPm2 = function() {
        return new Promise(function(resolve, reject) {
          console.log('Closing Main Window...');

          pm2.connect(true, function(err) {
            console.log('connecting to pm2...');

            if (err) {
              console.log(err);
            }
          });

          var result = 'Connecting To Pm2: done';

          console.log(result);
          resolve(result);
        })
      }

      var KillPm2 = function() {
        return new Promise(function(resolve, reject) {
          console.log('killing to pm2...');

          pm2.killDaemon(function(err) {
            pm2.disconnect();
            console.log('killed to pm2...');

            if (err)
              throw err;
          });

          var result = 'Killing Pm2: done';

          setTimeout(function() {
            console.log(result);

            resolve(result);
          }, 2000)
        })
      }

      var HideMainWindow = function() {
        return new Promise(function(resolve, reject) {
          console.log('Exiting App...');
          mainWindow = null;

          var result = 'Hiding Main Window: done';
          console.log(result);
          resolve(result);
        });
      }

      var QuitApp = function() {
        return new Promise(function(resolve, reject) {
          app.quit();
          var result = 'Quiting App: done';
          console.log(result);
          resolve(result);
        });
      }

      ConnectToPm2()
      .then(function(result) {
        return KillPm2();
      })
      .then(HideMainWindow)
      .then(QuitApp);
    });
  }
}

//app.on('ready', function() {
  //createLoadingWindow
//})

app.on('window-all-closed', function () {
    //if (os.platform() !== 'win32') { ig.kill(); }
  // in osx apps stay active in menu bar until explictly closed or quitted by CMD Q
  // so we do not kill the app --> for the case user clicks again on the iguana icon
  // we open just a new window and respawn iguana proc
  /*if (process.platform !== 'darwin' || process.platform !== 'linux' || process.platform !== 'win32') {
    app.quit()
  }*/
})

//Emitted before the application starts closing its windows.
//Calling event.preventDefault() will prevent the default behaviour, which is terminating the application.
app.on('before-quit', function (event) {
  if (mainWindow === null && loadingWindow != null) { //mainWindow not intitialised and loadingWindow not dereferenced
    //loading window is still open
    console.log('before-quit prevented');
    event.preventDefault();
  }
});

//Emitted when all windows have been closed and the application will quit.
//Calling event.preventDefault() will prevent the default behaviour, which is terminating the application.
app.on('will-quit', function (event) {
  if (mainWindow === null && loadingWindow != null) {
    //loading window is still open
    console.log('will-quit while loading window active');
    event.preventDefault();
  }
});

//Emitted when the application is quitting.
//Calling event.preventDefault() will prevent the default behaviour, which is terminating the application.
app.on('quit', function (event) {
  if (mainWindow === null && loadingWindow != null) {
    console.log('quit while loading window active');
    event.preventDefault();
  }
})

app.on('activate', function () {
  if (mainWindow === null) {
    //createWindow('open');
  }
});