var fs = require('fs');

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

var allowedOrigins = [ 
      'https://localhost:55543', 
      'http://localhost:3080',
      'http://localhost:3088',
      '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 serverPort = 3080;
/*
 // ssl enabled
var options = {
    key:    fs.readFileSync('./llo/swarmlab.key'),
    cert:   fs.readFileSync('./llo/swarmlab.crt')
};

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

var server = http.createServer(app);
const io = require("socket.io")(server, {
   cors: {
         origin: "http://localhost:8080",
         methods: ["GET", "POST"]
   }
});


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

 const simpleGit = require('simple-git');


//    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 RES = new Object();
				const page    	= req.query["page"]
				const per_page  = req.query["per_page"]
				RES.sort    	= req.query["sort"]
				RES.filter    = req.query["filter"]
				RES.type    	= req.query["type"]

  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 = per_page
				//var page = 1
				var lastpage = Math.trunc(total/5);

				if(lastpage <= 1) {
					lastpage=1
				}else{
					lastpage++
				}

        var next=(page+1);
        if(next >= lastpage){
        	next=lastpage;
				}
        var prev=(page-1);
				if(prev == 0){
					prev=1;
				}
				var from=((page-1)*perpage)+1;
				var to=(perpage*page)


              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": ${from},
                            "tomongo": ${to}
                          }
                  }
                `
                            //"next_page_url": "?page="+${next},
                            //"prev_page_url": "?page="+${prev},
//console.log(JSON.stringify(links))
              //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('/getmountinfo', (req, res, next) => {

				var RES = new Object();
				RES.instance    = req.query["instance"]
        var showexec = `docker inspect --format='{{json .Mounts}}' ${RES.instance} | jq . -s`
              //console.log(JSON.stringify(showexec))
        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(string))
              //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)
            }
         });

});

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)
            }
         });

});

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

        var mypath = process.cwd()
				var RES = new Object();
                    var found = 'yes'
                      RES.error = false
                      RES.error_msg = "ok"
                      RES.data = found;
                      RES.data = mypath
                      res.json(RES)
  /*
        exec('pwd', (err, stdout, stderr) => {
           if (err) {
              console.error(`exec error: ${err}`);
              return;
            }
           if (stdout) {
              var string = stdout.toString()
              console.log(JSON.stringify(string))
                    var found = 'yes'
                      RES.error = false
                      RES.error_msg = "ok"
                      RES.data = found;
                      RES.data = string
                      res.json(RES)

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

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

				var RES = new Object();
				RES.value    = req.query["value"]
        //console.log('value error '+JSON.stringify(RES.value))
        //var showexec = `cd ./hybrid; /bin/bash ./create-keys.sh`
        fs.writeFileSync('./hybrid/keys.json', JSON.stringify(RES.value));
        RES.value = JSON.parse(RES.value); 

var INTERFACE_IP=RES.value.wg_ip
var endpoint_tmp=RES.value.server_ip
var fields = endpoint_tmp.split(':');
  var endpoint = fields[0];
  var mypath = process.cwd()

var swarmlab_config_template = `
  DEV_NAME=wg0
  INTERFACE_IP=${INTERFACE_IP}/16
  INTERFACE_IProute=${INTERFACE_IP}
  ENDPOINT_IP=${endpoint}

  ip link set $DEV_NAME down
  ip link del $DEV_NAME
  # add wireguard interface 
  ip link add $DEV_NAME type wireguard

  # set wireguard conf  
  wg setconf $DEV_NAME ${mypath}/hybrid/connect/$DEV_NAME.conf

  # assign ip to wireguard interface 
  ip addr add $INTERFACE_IP dev $DEV_NAME

  # set sysctl
  sysctl -w net.ipv4.conf.all.rp_filter=2

  # set mtu for wireguard interface
  ip link set mtu 1420 up dev $DEV_NAME

  # bring wireguard interface up
  ip link set up dev $DEV_NAME

  # add route
  ip route add default via $INTERFACE_IProute metric 2 table 200
  ip route show table 200 | grep -w $INTERFACE_IProute

  # add local lan route
  ip rule add table main suppress_prefixlength 0
  ip rule show | grep -w "suppress_prefixlength"
`
        fs.writeFileSync('./hybrid/connect/swarmlab-connect.sh', swarmlab_config_template);

var allowed_ips=RES.value.allowed_ips
var swarmlab_public_wgkey=RES.value.swarmlab_public_wgkey
var swarmlab_privatekey=RES.value.privatekey
var swarmlab_wg_port=RES.value.wg_port
var swarmlab_wg0_template = `[Interface]
  PrivateKey = ${swarmlab_privatekey}
  ListenPort = ${swarmlab_wg_port}

[Peer]
  PublicKey = ${swarmlab_public_wgkey}
  Endpoint = ${endpoint_tmp}
  AllowedIPs = ${allowed_ips}
  PersistentKeepalive = 30

`
        //fs.writeFileSync('./hybrid/connect/template-wg0.conf', swarmlab_wg0_template);
        fs.writeFileSync('./hybrid/connect/wg0.conf', swarmlab_wg0_template);

var swarmlab_swarm=RES.value.workerkey
var swarmlab_swarm_ip=RES.value.swarm_ip
var swarmlab_swarm_template = `
  docker swarm join --token ${swarmlab_swarm}  ${swarmlab_swarm_ip}
`
        //fs.writeFileSync('./hybrid/connect/template-swarm.sh', swarmlab_swarm_template);
        fs.writeFileSync('./hybrid/connect/reload-swarmlab.sh', swarmlab_swarm_template);


var swarmlab_swarm_join_template = `
function swarmlab_ifup() {
  swarmlab=$(/bin/bash ${mypath}/hybrid/connect/status.sh wg0 | jq .swarmlab)
  tempswarm="\${swarmlab%\\"}"
  tempswarm="\${tempswarm#\\"}"
  swarmlab=$tempswarm
  echo $swarmlab
}
function hybrid_ifup() {
  hybrid=$(/bin/bash ${mypath}/hybrid/connect/status.sh wg0 | jq .hybrid)
  tempswarm1="\${hybrid%\\"}"
  tempswarm1="\${tempswarm1#\\"}"
  hybrid=$tempswarm1
  echo $hybrid
}

hybrid=$(hybrid_ifup)
if [ $hybrid == 'NotOnline' ]; then
        /bin/bash ${mypath}/hybrid/connect/swarmlab-connect.sh
        echo "Start wg0 network interface"
        sleep 3
        hybrid1=$(hybrid_ifup)
        if [ $hybrid1 == 'NotOnline' ]; then
                echo "Failed to start wg0 network interface"
        else
                  echo "Swarmlab hybrid $hybrid"
        fi
else
          echo "Swarmlab hybrid $hybrid"
fi

sleep 1
swarmlab=$(swarmlab_ifup)
if [ $swarmlab != 'active' ]; then
        /bin/bash ${mypath}/hybrid/connect/reload-swarmlab.sh
        sleep 5
        swarmlab1=$(swarmlab_ifup)
        if [ $swarmlab1 != 'active' ]; then
                echo "Failed to connect on swarmlab master"
                echo "Exec "
                echo "/bin/bash ${mypath}/hybrid/connect/reload-swarmlab.sh"
                echo "Please try again"
        fi
else
          echo "Swarmlab master $swarmlab"
fi
        /bin/bash ${mypath}/hybrid/connect/get-swarmlab-ca
        /bin/bash ${mypath}/hybrid/connect/get-base-ca
`
        fs.writeFileSync('./hybrid/connect/join.sh', swarmlab_swarm_join_template);

var swarmlab_swarm_leave_template = `
function hybrid_ifup() {
  hybrid=$(/bin/bash ${mypath}/hybrid/connect/status.sh wg0 | jq .hybrid)
  tempswarm1="\${hybrid%\\"}"
  tempswarm1="\${tempswarm1#\\"}"
  hybrid=$tempswarm1
  echo $hybrid
}

hybrid=$(hybrid_ifup)
if [ $hybrid == 'NotOnline' ]; then
          echo "Swarmlab hybrid $hybrid"
else
        ip link set wg0 down
        ip link del wg0
        sleep 3
        hybrid1=$(hybrid_ifup)
        if [ $hybrid1 == 'NotOnline' ]; then
                echo "Swarmlab hybrid $hybrid"
        else
                  echo "Swarmlab hybrid $hybrid"
        fi
fi
`

        fs.writeFileSync('./hybrid/connect/leave.sh', swarmlab_swarm_leave_template);

                      RES.error = false
                      RES.error_msg = "ok"
                      res.json(RES)
});

function create_project(swarmlabname,project){

       var services_path = './instance/'+swarmlabname+'/'+project
        fs.mkdir(services_path, { recursive: true }, (err) => {

             var service_up = '/bin/bash ../install/usr/share/swarmlab.io/sec/swarmlab-sec create'
             create = spawn(service_up, {
                shell: true,
                cwd: services_path,
                //detached: true,
                detached: false,
                //stdio: [ 'ignore', logout, logerr ]
                stdio: 'pipe'
              });

              create.stdout.on('data', function (data) {
                var n = {}
                n.data = data.toString()
                io.emit('message_out', n);
              });

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

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

         });
}

function myserverStatus(){
        var serverStatus = '/bin/bash ./hybrid/connect/status.sh wg0';
        exec(serverStatus, (err, stdout, stderr) => {
           if (err) {
              console.error(`exec error: ${err}`);
              return;
            }
           if (stdout) {
              var string = stdout.toString()
              string = JSON.parse(string); 
              //var stringstr = string.replace(/^"(.*)"$/, '$1');

              var n = {}
              n.data = string
              io.emit('message_hybrid_status', n);
            }
         });
}

myserverStatus();

setInterval(function(){
      myserverStatus()
}, 30000)

let child   = [];
var ppid = ''
io.on('connection', function(socket) {
  console.log('new connection');
    socket.on('start', (value) => {
            //console.log('start')
         //console.log('value '+JSON.stringify(value))
         if(value.swarmlabname){
               var service = value.swarmlabname
               var services_path = './instance/'+service+'/'+service
							 var ENV_service_file_path = services_path+'/.env'
               var service_port = ''
               if(value.swarmlabname_size){
                  var service_size = value.swarmlabname_size
               }else{
                  var service_size = 3
               }
							 const apptest = require('express')();
							 const servertest = apptest.listen(0, () => {
									 var newport = servertest.address().port
									 servertest.close();
									 if(value.swarmlabname_port){
												 service_port = value.swarmlabname_port
									 }else{
												 service_port = newport
							  	 }

							 var ENV_service_file = `
REGISTRY_ADDR=localhost
REGISTRY_PORT=5000
IMAGE_NAME=${service}
SSH_PORT=${service_port}
TEST=${service}
`
         //console.log('value1 '+JSON.stringify(ENV_service_file_path))
         //console.log('value2 '+JSON.stringify(ENV_service_file))
										fs.writeFileSync(ENV_service_file_path, ENV_service_file ,{encoding:'utf8',flag:'w'});

										 var service_up = '/bin/bash ../install/usr/share/swarmlab.io/sec/swarmlab-sec up size='+service_size

										 child[0] = spawn(service_up, {
												shell: true,
												cwd: services_path,
												//detached: true,
												detached: false,
												//stdio: [ 'ignore', logout, logerr ]
												stdio: 'pipe'
											});

											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);
											});
							 });
         }else{
                  var n = {}
                  n.data = 'NoSwarmlabname'
                  io.emit('message_err', 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('install', (value) => {
         if(value.swarmlabname){
            //console.log('install')
             var service = value.swarmlabname
             var service_git = value.git
             var services_path = './instance/'+service
             var ENV_service_dir = services_path+'/'+service
             var ENV_service_file_path = services_path+'/'+service+'/'.env
             if (fs.existsSync(services_path)) {
                  const git = simpleGit(
                            { 
                              baseDir: services_path,
                              maxConcurrentProcesses: 10 
                            });
                  try {
                    git.pull()
                      .then((status) => {
                        var n = {}
                        n.data = 'Updated'
                        io.emit('message_out', n);
                        n.data = '...'
                        io.emit('message_close', n);
                        create_project(service,service)
                      }).catch((err) => {
                        var n = {}
                        n.data = err.toString()
                        io.emit('message_err', n);
                        console.log('error ' + JSON.stringify(err))
                      });
                  } catch (e) { 
                    var n = {}
                    n.data = e.toString()
                    io.emit('message_err', n);
                  }
             }else{
              fs.mkdir(services_path, { recursive: true }, (err) => {
                if (err){
                  console.log('error ' + JSON.stringify(err))
                }else{
							 var ENV_service_file = `
REGISTRY_ADDR=localhost
REGISTRY_PORT=5000
IMAGE_NAME=${service}
SSH_PORT=
`
                  const git = simpleGit(
                            { 
                              baseDir: '.',
                              maxConcurrentProcesses: 10 
                            });
                  try {
                    git.clone(service_git, services_path)
                      .then((status) => {
                        var n = {}
                        n.data = 'Installed'
                        io.emit('message_out', n);
                        n.data = '...'
                        io.emit('message_out', n);
									      fs.writeFileSync(ENV_service_file_path, ENV_service_file);
                        create_project(service,service)
                      }).catch((err) => {
                        var n = {}
                        n.data = err.toString()
                        io.emit('message_err', n);
                        console.log('error ' + JSON.stringify(err))
                      });
                  } catch (e) { 
                    var n = {}
                    n.data = e.toString()
                    io.emit('message_err', n);
                  }

                }
              });
            }
         }else{
            var n = {}
            n.data = 'no services'
            io.emit('message_err', n);
         }
    });

    socket.on('container-stop', (service, id) => {
        var mypath = process.cwd()
        console.log(mypath);
				 var containerrm = '/bin/sh ./hybrid/connect/container-stop.sh '+id
          const stop = spawn(containerrm, {
            stdio: 'pipe',
            shell: true,
            cwd: mypath
          });
          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();
    });

    socket.on('create-wirequard', (value) => {
        let rawdatafile = './hybrid/config.json'
         var workerkey  = value.workerkey
         var privatekey  = value.privatekey
         var publickey  = value.publickey
         var server_ip  = value.server_ip // 83.212.77.133:51820
         var allowed_ips  = value.allowed_ips // 10.13.13.0/16, 0.0.0.0/0, ::/0

         var services_json = {
              workerkey: workerkey,
              privatekey: privatekey,
              publickey: publickey, 
              server_ip: server_ip,
              allowed_ips: allowed_ips
        };
       
      let datajson = JSON.stringify(services_json);
      fs.writeFileSync(rawdatafile, datajson);

         var services_path = ` ----------------
        create a file 
        /etc/wireguard/wg0.conf
        -----------------------
      `
							 var ENV_service_file = `
       create a file connect-server.sh

[Interface]
PrivateKey = ${privatekey}
  ListenPort = 51820

[Peer]
PublicKey = ${publickey}
  Endpoint = ${server_ip}
AllowedIPs = ${allowedOrigins}
PersistentKeepalive = 30

`
            var n = {}
            n.data = services_path
            io.emit('message_out', n);
            n.data = ENV_service_file
            io.emit('message_out', n);

            var n = {}
            n.data = 'bash ./connect-server.sh'
            io.emit('message_close', n);
    });
    socket.on('get-serverconfig', () => {

        let rawdatafile = './hybrid/keys.json'
      if (fs.existsSync(rawdatafile)) {
        let rawdata = fs.readFileSync(rawdatafile);
        let config = JSON.parse(rawdata);
            var n = {}
            n.file = 'ok'
            n.data = config
            io.emit('message_config', n);
      }else{
            var n = {}
            n.file = 'nodata'
            n.data = 'nodata'
            io.emit('message_config', n);
      }
    });


});

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