text: ﻿/*
     Copyright 2012 IBM
  
     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.
  */
  
  window.TopologyView = Backbone.View.extend({
      initialize: function () {
          this.template = _.template(tpl.get('topology'));
          this.model.bind("change", this.render, this);
          this.hosts = this.options.hosts.models;
          this.host_links = [];
      },
  
      render: function (eventName) {
          $(this.el).html(this.template());
          var width = 900,
              height = 600;
          var color = d3.scale.category20();
          var force = d3.layout.force()
                               .charge(-500)
                               .linkDistance(200)
                               .size([width, height]);
          var svg = d3.select("#topology-graph").append("svg")
                      .attr("width", width)
                      .attr("height", height);
          if (this.model.nodes) {
              for (var i = 0; i < this.model.nodes.length; i++) {
                  this.model.nodes[i].group = 1;
                  this.model.nodes[i].id = this.model.nodes[i].name;
              }
  
              for (var i = 0; i < this.hosts.length; i++) {
                  host = this.hosts[i];
                  if (host.attributes['ipv4'].length > 0) {
                      host.name = host.attributes['ipv4'][0] + "\n" + host.id;
                  } else {
                      host.name = host.id;
                  }
                  host.group = 2;
                  //console.log(host);
              }
  
              var all_nodes = this.model.nodes.concat(this.hosts);
  
              var all_nodes_map = [];
  
              _.each(all_nodes, function (n) {
                  all_nodes_map[n.id] = n;
              });
  
              for (var i = 0; i < this.hosts.length; i++) {
                  host = this.hosts[i];
                  //for (var j = 0; j < host.attributes['attachmentPoint'].length; j++) {
                  for (var j = 0; j < 1; j++) { // FIXME hack to ignore multiple APs
                      var link = {
                          source: all_nodes_map[host.id],
                          target: all_nodes_map[host.attributes['attachmentPoint'][j]['switchDPID']],
                          value: 10
                      };
                      //console.log(link);
                      if (link.source && link.target) {
                          this.host_links.push(link);
                      } else {
                          console.log("Error: skipping link with undefined stuff!")
                      }
                  }
              }
  
              var all_links = this.model.links.concat(this.host_links);
  
              force.nodes(all_nodes).links(all_links).start();
              var link = svg.selectAll("line.link").data(all_links).enter()
                            .append("line").attr("class", "link")
                            .style("stroke", function (d) { return "black"; });
              var node = svg.selectAll(".node").data(all_nodes)
                            .enter().append("g")
                            .attr("class", "node")
                            .call(force.drag);
  
              node.append("image")
                  .attr("xlink:href", function (d) { return d.group == 1 ? "/ui/img/switch.png" : "/ui/img/server.png" })
                  .attr("x", -16).attr("y", -16)
                  .attr("width", 32).attr("height", 32);
              node.append("text").attr("dx", 20).attr("dy", ".35em")
                  .text(function (d) { return d.name });
              node.on("click", function (d) {
                  // TODO we could add some functionality here
                  console.log('clicked ' + d.name);
              });
              node.append("title").text(function (d) { return d.name; });
              force.on("tick", function () {
                  link.attr("x1", function (d) { return d.source.x; })
                      .attr("y1", function (d) { return d.source.y; })
                      .attr("x2", function (d) { return d.target.x; })
                      .attr("y2", function (d) { return d.target.y; });
                  node.attr("transform", function (d) { return "translate(" + d.x + "," + d.y + ")"; });
  
              });
          }
          return this;
      }
  });