(function () {
  'use strict';

  const shapes = {
    cloud: ' M 79.72 49.60 C 86.00 37.29 98.57 29.01 111.96 26.42 C 124.27 24.11 137.53 26.15 148.18 32.90 C 158.08 38.78 165.39 48.87 167.65 60.20 C 176.20 57.90 185.14 56.01 194.00 57.73 C 206.08 59.59 217.92 66.01 224.37 76.66 C 227.51 81.54 228.85 87.33 229.23 93.06 C 237.59 93.33 246.22 95.10 253.04 100.19 C 256.69 103.13 259.87 107.67 258.91 112.59 C 257.95 118.43 252.78 122.38 247.78 124.82 C 235.27 130.43 220.23 130.09 207.98 123.93 C 199.33 127.88 189.76 129.43 180.30 128.57 C 173.70 139.92 161.70 147.65 148.86 149.93 C 133.10 153.26 116.06 148.15 104.42 137.08 C 92.98 143.04 78.96 143.87 66.97 139.04 C 57.75 135.41 49.70 128.00 46.60 118.43 C 43.87 109.95 45.81 100.29 51.30 93.32 C 57.38 85.18 67.10 80.44 76.99 78.89 C 74.38 69.20 74.87 58.52 79.72 49.60 Z'
  }

  var computeNodeId = 0;
  var instanceId = 0;

  angular.module('xos.serviceTopology')
  .service('NodeDrawer', function(d3, serviceTopologyConfig, Node){
    this.addNetworks = (nodes) => {
      nodes.append('path')
      .attr({
        d: shapes.cloud,
        transform: 'translate(-63, -52), scale(0.5)',
        class: 'cloud'
      });

      nodes.append('text')
      .attr({
        'text-anchor': 'middle'
      })
      .text(d => d.name)
    }

    this.addRack = (nodes) => {

      // NOTE is good to request data here? Probably not.

      Node.queryWithInstances().$promise
      .then((computeNodes) => {
        this.drawComputeNodes(nodes, computeNodes);
      });

      // NOTE should we draw the rack?
      nodes.append('rect')
      .attr(serviceTopologyConfig.rack);

      nodes.append('text')
      .attr({
        'text-anchor': 'middle',
        y: serviceTopologyConfig.rack.y - 10
      })
      .text(d => d.name);
    };

    this.drawComputeNodes = (container, nodes) => {
      console.log('drawComputeNodes');
      let elements = container.selectAll('.compute-nodes')
      .data(nodes, d => {
        if(!angular.isString(d.d3Id)){
          d.d3Id = `compute-node-${++computeNodeId}`;
        }
        return d.d3Id;
      });

      var nodeContainer = elements.enter().append('g')
      .attr({
        class: 'compute-node'
      });

      nodeContainer.append('rect')
      .attr(serviceTopologyConfig.computeNode);

      // if there are Compute Nodes
      if(nodeContainer.length > 0){
        angular.forEach(nodeContainer.data(), (computeNode) => {
          this.drawInstances(nodeContainer, computeNode.instances);
        });
      }

    };

    this.drawInstances = (container, instances) => {
      
      // TODO position instances... How??

      let elements = container.selectAll('.instances')
      .data(instances, d => angular.isString(d.d3Id) ? d.d3Id : d.d3Id = `instance-${++instanceId}`)

      var instanceContainer = elements.enter().append('g')
      .attr({
        class: 'instance'
      });

      instanceContainer.append('rect')
      .attr(serviceTopologyConfig.instance);
    };

    this.addPhisical = (nodes) => {
      nodes.append('rect')
      .attr(serviceTopologyConfig.square);

      nodes.append('text')
      .attr({
        'text-anchor': 'middle',
        y: serviceTopologyConfig.square.y - 10
      })
      .text(d => d.name);
    }

    this.addDevice = (nodes) => {
      nodes.append('circle')
      .attr(serviceTopologyConfig.circle);

      nodes.append('text')
      .attr({
        'text-anchor': 'end',
        x: - serviceTopologyConfig.circle.r - 10,
        y: serviceTopologyConfig.circle.r / 2
      })
      .text(d => d.name); 
    }
  });
})();