var express = require('express');
var request = require('request');

const serverurl = "http://127.0.0.1:2000/";
   //'http://172.16.1.129:2000/';// "http://watchdog.100fat.nl/installations/";
const apiKey = "7f1bdf98a3674b14b51851c906e9bce4";
const timerInterval = 25; //in minutes
var InstallationID = '5cdac9ad6782e12884abe8cf';
const maxTries = 5;
var tries = 0;
var exec = require('child_process').exec;


var fs = require('fs');

var app = express();

var autoUpdate;


console.log('client is running!');
//startShellScript();
start();

function start(){
	// todo:: create request to the server.
	// send json settings over.
	// check on server if applyautoUpdate is true (overhead is for the server where as the clients first time gets an update)

	//server side:
	// if(applyautoUpdate){
		//update client to be same as server
	//}else{
		//something changed in client, update server to be same.
	//}

	readSettings();
	console.log('autoUpdate: '+autoUpdate);
	pingAgain();
}

var user='thomas';
var password = '123fat123';
//var base64encodedData = Buffer.allocUnsafe(user + ':' + password).toString('base64');


function pingAgain(){
	//writeSettings();

	makePostRequest();
}


function makePostRequest(){
	var receivedData='';
	console.log('make request!');
	//original
	//request.post(serverurl+'installations/'+InstallationID+'/'+autoUpdate, {
    //  'auth': {
      //  'bearer': apiKey
    //}

   request.post(serverurl+'installations/'+InstallationID+'/'+autoUpdate, {
	   'auth': {
		  user:'thomas',
		  pass: '123fat123'
	   }
	  }, function(error, response, body){

        if(error){
            console.log('Error pinging watchdog server: ' + error);
            if(tries < maxTries)
            {
                tries++;
                console.log("Retry pinging watchdog server: " + tries);
                setTimeout(pingAgain, 20000); //Retry ping after 20 seconds
            }
        }

        if(response){
			if (response.statusCode== 300){
				console.log('try to fetch update form server with file: '+body.response);
				//response.once('finish',function(){
				//	console.log('hopefully finished??');
				//setTimeout(updateInstallation(response.body,response),2000); // temp wait 2 seconds for the whole body to arrive

					//updateInstallation(response.body, response);
			//	});

				//response.download(body.response);

			}else

            if(response.statusCode != 200){
             //   console.log("Watchdog Error: could not ping server. Server responded: " + response.statusCode + " " + response.body);
				//updateInstallation(response.body, response);
                if (tries < maxTries)
                {
                    tries++;
                    console.log("Retry pinging watchdog server: " + tries);
                    setTimeout(pingAgain, 20000); //Retry ping after 20 seconds
                }
            } else {
                tries = 0;
            }
        }

    }).on('data',function(data){
		receivedData+=data;
	}).on('end',function(data){

		parseUpdateFile(receivedData);

		/*if(receivedData && receivedData.includes('{')){
			if(receivedData.includes('{')){
				console.log('includes some stuff so has to be json!');
			}
			console.log('json file! with content: '+receivedData);

			applySettings(receivedData);


		}else{
		//console.log('callback final fniished!: '+receivedData);//+receivedData);
			updateInstallation(receivedData);
		}*/

	});
}

function parseUpdateFile(receivedData){
	let updatePackage = JSON.parse(receivedData);


	for(var i = 0; i< updatePackage.UpdateFiles.length; i++){
		downloadFile(updatePackage.UpdateFiles[i]);
	}

		setTimeout(startShellScript,20000);
}

function applySettings(jsonString){
	let loadedSettings = JSON.parse(jsonString);
	console.log('loaded settings auto update: '+loadedSettings.AutoUpdate)
	//if(loadedSettings.AutoUpdate != autoUpdate){
		autoUpdate = loadedSettings.AutoUpdate;
		let newSettings = {
			AutoUpdate : loadedSettings.AutoUpdate
		};

		console.log('newsettings before: '+newSettings);

		var finalSettings = JSON.stringify(newSettings);
		console.log('new settings after: '+finalSettings);
		serverCallback(newSettings.AutoUpdate);
		fs.writeFileSync('settings.json',finalSettings,function(err){
			if(err)throw err;
		});
		console.log('\n \ndone writing settings!!');
	//}else{
	//	console.log('same settings no need to write!');
	//}
	// todo:: call server callback to remove the temp update from the db


}

function serverCallback(autoUpdate){
	console.log('try to  get: '+serverurl+'updateClientSettings/'+InstallationID+'/'+autoUpdate);
	request(serverurl+'updateClientSettings/'+InstallationID+'/'+autoUpdate, {
     'auth': {
		 user: 'thomas',
		 pass: '123fat123'
    },
	  encoding: 'binary'
    }, function(error, response, body){
		if(response){
			if(response.statusCode== 300){
				//console.log('response: '+body);
				console.log('client is happy!');
			}
		}
	});
}


function updateInstallation(content){
	var lines = content.split(',');//.replace(/\n$/, '');
	console.log('lines count: '+lines.length);
	var newLines = lines;
	for(var i = 0; i< lines.length; i++){
		newLines[i] = lines[i].trim().replace(',','');
		downloadFile(newLines[i]);
	}
	//console.log('files downloaded!'); // todo execute shell script to apply on fatplayer
	//running a command!

	//console.log('try to check for files... wait maybe there still gonna come..');

	setTimeout(startShellScript,20000);
	//console.log('timeouto ver');

}

function startShellScript(){
		console.log('start shell script');
	var cmd = '/Fatplayer/Downloads/launchUpdate.sh';//'startx /usr/bin/chromium-browser --no-sandbox --test-type --noerrdialog --kiosk --incognito --no-context-menu --disable-pinch --overscroll-history-navigation=0 --no-touch-pinch localhost';
		// var cmd = 'startx'; //Used for debugging --> launches desktop
		exec(cmd, function(error, stdout, stderr) {
			if(error){
				console.log(error);
				console.log("AAAHH DOET T NIET");
			} else {
				console.log("launching action!");
			}
			console.log(stdout);
			console.log(stderr);
		});
}

function downloadFile(filePath){
	if(filePath=='') return;
	console.log('try to  get: '+serverurl+'downloadFile/'+InstallationID+'/'+filePath);
	request(serverurl+'downloadFile/'+InstallationID+'/'+filePath, {
     'auth': {
		 user: 'thomas',
		 pass: '123fat123'
    },
	  encoding: 'binary'
    }, function(error, response, body){
		if(response){
			//if(response.statusCode== 300){
				//console.log('response: '+body);
				console.log('created file: '+filePath);

				// if files already in fatplayerfiles.. make backup of older file..



				writeFile(__dirname+"/Downloads/"+filePath,body,function(err){
					if(err){
						console.log(err);
					}
				});
				SaveFileStatusOnServer(filePath);
			//}
		}
	});
}

function SaveFileStatusOnServer(filePath){
	console.log('try to  get: '+serverurl+'updateClientFile/'+InstallationID+'/'+filePath);
	request(serverurl+'updateClientFile/'+InstallationID+'/'+filePath, {
      'auth': {
		  user: 'thomas',
		  pass:'123fat123'
    },
	  encoding: 'binary 	'
    }, function(error, response, body){
		if(response){
			if(response.statusCode== 300){
				//console.log('response: '+body);
				console.log('goddamn we got a response! launch shell script when got all responses...');
			}
		}
	});
}

var mkdirp = require('mkdirp');
var getDirName = require('path').dirname;

function writeFile(path, contents, cb) {
  mkdirp(getDirName(path), function (err) {
    if (err) return cb(err);

    fs.writeFile(path, contents, 'binary',function(err){
		if(err){
			console.log('err '+err);
		}
	});
  });
}

function readSettings(){
	let rawdata = fs.readFileSync('settings.json');
	let settings = 	JSON.parse(rawdata);
	autoUpdate = settings.AutoUpdate;
	console.log('settings auto update: '+autoUpdate);
}