var fs = require('fs');

var express = require('express');
var https = require('https');
var app = express();
const cors = require('cors')
 const helmet = require('helmet');

var allowedOrigins = [ 
      'https://localhost:55543', 
      'http://localhost:8080'
      ];

app.use(cors({
origin: function(origin, callback){    // allow requests with no origin 
      // (like mobile apps or curl requests)
      if(!origin) 
        return callback(null, true);    
        if(allowedOrigins.indexOf(origin) === -1){
          var msg = 'The CORS policy for this site does not ';
          return callback(new Error(msg), false);
         }
      return callback(null, true);
    }
}));


//app.use(cors)
app.use(helmet());
app.use(express.json());

var options = {
    key:    fs.readFileSync('./llo/swarmlab.key'),
    cert:   fs.readFileSync('./llo/swarmlab.crt')
};
var serverPort = 3000;

var server = https.createServer(options, app);
var io = require('socket.io')(server);

const { spawn, exec } = require('child_process')
//    const { exec } = require('child_process');
//const chokidar = require('chokidar');


//const logout = fs.openSync('./logs/out.log', 'a');
//const logerr = fs.openSync('./logs/out.log', 'a');

//const watcher = chokidar.watch('./logs/out.log', { persistent: true });
//const Tail = require('nodejs-tail');
//const tail = new Tail('./logs/out.log');
//tail.watch();
//      tail.on('line', (line) => {
//        var n = {}
//        n.data = line
//        io.emit('message_out', n);
//      })
/*
watcher
  .on('add', path => {
      var n = {}
      n.data = path.toString()
  })
  .on('change', async path => {
     //var updateContent = await readLastLines.read(path, 1);
      tail.on('line', (line) => {
        var n = {}
        n.data = line
        io.emit('message_out', n);
      })
  })
  .on('unlink', path => {
      var n = {}
      n.data = path.toString()
      io.emit('message_out', n);
 });
*/


// ***************************************************
//      rest  get
// ***************************************************

app.get('/dockerservices', (req, res, next) => {

//var showexec = `docker ps --format `docker ps --format '{"ID":"{{ .ID }}", "Image": "{{ .Image }}", "Names":"{{ .Names }}", "Command": "{{ .Command }}", "CreatedAt": "{{ .CreatedAt }}", "Networks": "{{ .Networks }}"}' | jq . -s `
//var showexec = `docker ps --format '{"ID":"{{ .ID }}", "Image": "{{ .Image }}", "Names":"{{ .Names }}"}' | jq . -s `
  //docker ps --format '{"ID":"{{ .ID }}", "Image": "{{ .Image }}", "Names":"{{ .Names }}", "Command": "{{ .Command }}", "CreatedAt": "{{ .CreatedAt}}",   "Networks":"{{ .Networks}}", "Ports": "{{ .Ports}}", "RunningFor": "{{ .RunningFor}}", "Status": "{{ .Status}}"  }'
//var showexec = `docker ps --format '{"ID":"{{ .ID }}", "Image": "{{ .Image }}", "Names":"{{ .Names }}", "Ports":"{{.Ports}}", "Networks":"{{.Networks}}", "Status":"{{.Status}}","Command":"{{,Command}}","RunningFor":"{{.RunningFor}}","CreatedAt":"{{.CreatedAt}}"}' | jq . -s `
var showexec = `docker ps --format '{"ID":"{{ .ID }}", "Image": "{{ .Image }}", "Names":"{{ .Names }}", "Ports":"{{.Ports}}", "Networks":"{{.Networks}}", "Status":"{{.Status}}","RunningFor":"{{.RunningFor}}","CreatedAt":"{{.CreatedAt}}"}' | jq . -s `
    exec(showexec, (err, stdout, stderr) => {
        if (err) {
              console.error(`exec error: ${err}`);
              return;
            }

         var nn = [] 
        var string = stdout.toString()
        var datajson = JSON.parse(string);

        console.log('Number of files ' + stdout);
        console.log('Number string ' + string);
        console.log('stringify  ' + JSON.stringify(datajson));
            var total = datajson.length
            var perpage = 5
            var page = 1
            var lastpage = total/5
            var from = 1
            var to = 5
              var myplaybooks = new Object();
            var links = `
              {
                    "pagination": {
                            "total": ${total},
                            "per_page": ${perpage},
                            "current_page": ${page},
                            "last_page": ${lastpage},
                            "next_page_url": "?page=$next",
                            "prev_page_url": "?page=$prev",
                            "from": ${from},
                            "to": ${to},
                            "frommongo": "frommongo",
                            "tomongo": "tomongo"
                          }
                  }
                `
              //myplaybooks.links = links
              myplaybooks.links = JSON.parse(links);
              myplaybooks.data = datajson;

              var RES = new Object();
              RES.code    = req.query["action"]
              RES.token    = req.query["token"]
              RES.error = false
              RES.error_msg = "ok"
              RES.data = myplaybooks;
              res.json(RES.data)
    });

});

app.get('/getservicesinfo', (req, res, next) => {

				var RES = new Object();
				RES.instance    = req.query["instance"]
        var services_path = './instance/'+RES.instance
        console.log(services_path)
				if (fs.existsSync(services_path)) {
            var found = 'yes'
              RES.error = false
              RES.error_msg = "ok"
              RES.data = found;
              res.json(RES)
				}else{
            var found = 'no'
              RES.error = false
              RES.error_msg = "ok"
              RES.data = found;
              res.json(RES)
				}

});

app.get('/getservicesstatus', (req, res, next) => {

				var RES = new Object();
				RES.instance    = req.query["instance"]
        var showexec = `docker ps --format '{"Names":"{{ .Names }}", "Status":"{{.Status}}"}' | jq . -s `
        exec(showexec, (err, stdout, stderr) => {
           if (err) {
              console.error(`exec error: ${err}`);
              return;
            }
           if (stdout) {
              var string = stdout.toString()
              var datajson = JSON.parse(string);
              console.log(JSON.stringify(datajson.length))
              console.log(JSON.stringify(datajson))
              var extenderror = new RegExp(RES.instance); 
              var found = 'no';
              for(var i = 0; i < datajson.length; i++) {
                 var servicename = datajson[i].Names
                 console.log(JSON.stringify(servicename))
                  if(extenderror.test(servicename)){
                     found = 'yes';
                  }
              }
                      RES.error = false
                      RES.error_msg = "ok"
                      RES.test = datajson;
                      RES.data = found;
                      res.json(RES)

            }else{
                    var found = 'no'
                      RES.error = false
                      RES.error_msg = "ok"
                      RES.data = found;
                      res.json(RES)
            }
         });

});

let child   = [];
var ppid = ''
io.on('connection', function(socket) {
  console.log('new connection');
    socket.on('start', (service) => {
         var services_path = './instance/'+service+'/'+service
          //const childstart = spawn('/bin/sh ./swarmlab-sec/hybrid//start.sh');

         //child[0] = spawn('/bin/sh ./start.sh', {
         child[0] = spawn('/bin/bash ../install/usr/share/swarmlab.io/sec/swarmlab-sec up size=3', {
            shell: true,
            //shell: false,
            cwd: services_path,
            //detached: true,
            detached: false,
            //stdio: [ 'ignore', logout, logerr ]
            stdio: 'pipe'
          });
          //child[0].unref();
          ppid = child[0].pid;
          console.log(ppid)
          child[0].stdout.on('data', function (data) {
            var n = {}
            n.data = data.toString()
            io.emit('message_out', n);
          });

          child[0].stderr.on('data', function (data) {
            var n = {}
            n.data = data.toString()
            io.emit('message_err', n);
          });

          child[0].on('close', function (code) {
            var n = {}
            n.data = code
            io.emit('message_close', n);
          });
    });


    socket.on('stop', (service) => {
         var services_path = './instance/'+service+'/'+service
          const stop = spawn('/bin/sh ./stop.sh', {
            stdio: 'pipe',
            shell: true,
            cwd: services_path
          });
          stop.stdout.on('data', function (data) {
            var n = {}
            n.data = data.toString()
            io.emit('message_out', n);
          });

          stop.stderr.on('data', function (data) {
            var n = {}
            n.data = data.toString()
            io.emit('message_err', n);
          });

          stop.on('close', function (code) {
            var n = {}
            n.data = code
            io.emit('message_close', n);
          });
    });

    socket.on('kill', () => {
        console.log(ppid)
        //process.kill(ppid, 'SIGHUP');
        child[0].kill('SIGHUP');
        //child[0].kill('SIGINT');
        //child[0].kill();
    });

});

server.listen(serverPort, function() {
  console.log('server up and running at %s port', serverPort);
});