<html>
<head>
    <!--
     Licensed to the Apache Software Foundation (ASF) under one or more
     contributor license agreements.  See the NOTICE file distributed with
     this work for additional information regarding copyright ownership.
     The ASF licenses this file to You 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

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<meta charset="UTF-8">
    <title>Storm Flux Viewer</title>
    <style>
      body {
        font-family: helvetica;
        font-size: 16px;
      }

      textarea {
        font-size: 16px;
      }

      .cy {
        width: 49%;
        height: 80%;
        z-index: 999;
        float: left;
	border: 1px solid black;
      }
    </style>
    <script src="/js/jquery-1.11.1.min.js"></script>
    <script src="/js/cytoscape.min.js"></script>
    <script src="/js/dagre.min.js"></script>
    <script src="/js/cytoscape-dagre.js"></script>

    <script src="/js/esprima.min.js"></script>
    <script src="/js/js-yaml.min.js"></script>
    <script type="text/javascript">
      function toCytoscapeGraph(doc) {
        var nodes = [];
        for(i in doc.bolts) {
          var e = doc.bolts[i];
          e.type='bolt';
          nodes[e.id] = e;
        }
        for(i in doc.spouts) {
          var e = doc.spouts[i];
          e.type='spout';
          nodes[e.id] = e;
        }
        var nNodes = [];
        for(i in nodes) {
          var node = nodes[i];
          nNodes.push({data:{id:i, class:node.className, type:node.type}});
        }
        var edges = [];
        for(i in doc.streams) {
          var e = doc.streams[i];
          edges.push({ data:{source:e.from, target:e.to, label: e.grouping.type}});
        }
        var graph = { nodes:nNodes, edges:edges }
        return graph
      }

      function parseAndRender() {
        var input = document.getElementById('taInput').value;
        var doc = jsyaml.load(input);
	if(doc==null){
	   return;
	}
        var graph = toCytoscapeGraph(doc)

        $(function(){

        var cy = window.cy = cytoscape({
          container: document.getElementById('cy'),

          boxSelectionEnabled: false,
          autounselectify: true,

          layout: {
            name: 'dagre'
          },

          style: [
            {
              selector: 'node',
              style: {
                'content': 'data(id)',
                'text-valign': 'bottom'
              }
            },

            {
              selector: '[type=\'spout\']',
              style: {
                'content': 'data(id)',
                'text-valign': 'bottom',
                'height': 100,
                'width': 100,
                'background-image': '/images/spout.png'
              }
            },

            {
              selector: '[type=\'bolt\']',
              style: {
                'content': 'data(id)',
                'text-valign': 'bottom',
                'height': 100,
                'width': 100,
                'background-image': '/images/bolt.png'
              }
            },

            {
              selector: 'edge',
              style: {
                'content': 'data(label)',
                'curve-style': 'haystack',
                'haystack-radius': 0,
                'width': 5,
                'opacity': 0.5,
                'line-color': 'black'
              }
            }
          ],

          elements: graph});
        });
      }
    </script>
</head>
<body>
  <h1><a href="/">Storm UI</a></h1>
  <h3>Flux Topology Viewer<button style="float:right" onclick="parseAndRender()">Refresh</button></h3>
  <div id="input">
    <textarea id="taInput" class="cy"  onchange="parseAndRender()"># YAML Definition</textarea>
  </div>

  <div id="cy" class="cy" >
  </div>

  <script type="text/javascript">
    parseAndRender();
  </script>

</body>
</html>