text: /*
   Copyright (c) 2017 SONATA-NFV and Paderborn University
   ALL RIGHTS RESERVED.
   
   Licensed under the Apache License, Version 2.0 (the "License");
   you may not use this file except in compliance with the License.
   You may obtain a copy of the License at
  
      http://www.apache.org/licenses/LICENSE-2.0
  
   Unless required by applicable law or agreed to in writing, software
   distributed under the License is distributed on an "AS IS" BASIS,
   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   See the License for the specific language governing permissions and
   limitations under the License.
  
   Neither the name of the SONATA-NFV, Paderborn University
   nor the names of its contributors may be used to endorse or promote
   products derived from this software without specific prior written
   permission.
  
   This work has been performed in the framework of the SONATA project,
   funded by the European Commission under Grant number 671517 through
   the Horizon 2020 and 5G-PPP programmes. The authors would like to
   acknowledge the contributions of their colleagues of the SONATA
   partner consortium (www.sonata-nfv.eu).
  */
  var API_HOST = "";  // set to a remote url if dashboard is not served by REST API server
  var ERROR_ALERT = false;
  var TIMESTAMP = 0;
  var CONNECTED = false;
  var LATENESS_UPDATE_INTERVAL = 50;
  var DATA_UPDATE_INTERVAL = 1000 * 10; // 30 seconds
  var LAST_UPDATE_TIMESTAMP_CONTAINER = 0;
  var LAST_UPDATE_TIMESTAMP_DATACENTER = 0;
  
  
  function update_lateness_loop() {
      lateness_datacenter= (Date.now() - LAST_UPDATE_TIMESTAMP_DATACENTER) / 1000;
      $("#lbl_lateness_datacenter").text("Lateness: " + Number(lateness_datacenter).toPrecision(2) + "s");
      lateness_container= (Date.now() - LAST_UPDATE_TIMESTAMP_CONTAINER) / 1000;
      $("#lbl_lateness_container").text("Lateness: " + Number(lateness_container).toPrecision(2) + "s");
      // loop while connected
      if(CONNECTED)
          setTimeout(update_lateness_loop, LATENESS_UPDATE_INTERVAL)
  }
  
  
  function errorAjaxConnection()
  {
      // only do once
      if(!ERROR_ALERT)
      {
          ERROR_ALERT = true;
          // show message
          //alert("API request failed. Is the emulator running?", function() {
          //    // callback
          //    ERROR_ALERT = false;
          //});
      }
      CONNECTED = false;
      console.error("API request failed. Is the emulator running?")
  }
  
  
  function update_table_datacenter(data)
  {
      console.debug(data)
      // clear table
      $("#table_datacenter").empty();
      // header
      $("#table_datacenter").append('<tr class="tbl-head"><td>Label</td><td>Int. Name</td><td>Switch</td><td>Num. Containers</td><td>VNFs</td></tr>');
      // fill table
      $.each(data, function(i, item) {
          var row_str = "";
          row_str += '<tr class="tbl-row clickable_row" id="datacenter_row_' + i +'">';
          row_str += '<td>' + item.label + '</td>';
          row_str += '<td>' + item.internalname + '</td>';
          row_str += '<td>' + item.switch + '</td>';
          row_str += '<td><span class="badge">' + item.n_running_containers + '</span></td>';
          //row_str += '<td><span class="badge">' + Object.keys(item.metadata).length + '</span></td>';
          row_str += '<td>' + item.vnf_list + '</span></td>';
          row_str += '<tr>';
  	$("#table_datacenter").append(row_str);
      });
      $("#lbl_datacenter_count").text(data.length);
      // update lateness counter
      LAST_UPDATE_TIMESTAMP_DATACENTER = Date.now();
  }
  
  
  function update_table_container(data)
  {
      console.debug(data)
      // clear table
      $("#table_container").empty();
      // header
      $("#table_container").append('<tr class="tbl-head"><td>Datacenter</td><td>Container</td><td>Image</td><td>docker0</td><td>Status</td></tr>');
      // fill table
      $.each(data, function(i, item) {
          var row_str = "";
          row_str += '<tr class="tbl-row clickable_row" id="container_row_' + i +'">';
          row_str += '<td>' + item[1].datacenter + '</td>';
          row_str += '<td>' + item[0] + '</td>';
          row_str += '<td>' + item[1].image + '</td>';
          row_str += '<td><code>' + item[1].docker_network + '<code></td>';
          if(item[1].state.Status == "running")
              row_str += '<td><span class="label label-success">running</span></td>';
          else
              row_str += '<td><span class="label label-danger">stopped</span></td>';
          row_str += '<tr>';
  	$("#table_container").append(row_str);
      });
      $("#lbl_container_count").text(data.length);
      // update lateness counter
      LAST_UPDATE_TIMESTAMP_CONTAINER = Date.now();
  }
  
  
  function fetch_datacenter()
  {
      // do HTTP request and trigger gui update on success
      var request_url = API_HOST + "/restapi/datacenter";
      console.debug("fetching from: " + request_url);
      $.getJSON(request_url,  update_table_datacenter);
  }
  
  
  function fetch_container()
  {
      // do HTTP request and trigger gui update on success
      var request_url = API_HOST + "/restapi/compute";
      console.debug("fetching from: " + request_url);
      $.getJSON(request_url,  update_table_container);
  }
  
  
  function fetch_loop()
  {
      // only fetch if we are connected
      if(!CONNECTED)
          return;
  
      // download data
      fetch_datacenter();
      fetch_container();
      
      // loop while connected
      if(CONNECTED)
          setTimeout(fetch_loop, DATA_UPDATE_INTERVAL);
  }
  
  
  function connect()
  {
      console.info("connect()");
      // get host address
      //API_HOST = "http://" + $("#text_api_host").val();
      console.debug("API address: " + API_HOST);
      // reset data
      LAST_UPDATE_TIMESTAMP_DATACENTER = Date.now();
      LAST_UPDATE_TIMESTAMP_CONTAINER = Date.now();
      CONNECTED = true;
      // restart lateness counter
      update_lateness_loop();
      // restart data fetch loop
      fetch_loop();
  }
  
  
  $(document).ready(function(){
      console.info("document ready");
      // setup global connection error handling
      
      $.ajaxSetup({
          "error": errorAjaxConnection
      });
  
      // connect
      connect();
  
      // additional refresh on window focus
      $(window).focus(function () {
          if(CONNECTED)
          {
              fetch_datacenter();
              fetch_container();  
          }
      });
  
  });
  