/*
*  Copyright (C) 1998-2020 by Northwoods Software Corporation. All Rights Reserved.
*/

/*
* This is an extension and not part of the main GoJS library.
* Note that the API for this class may change with any version, even point releases.
* If you intend to use an extension in production, you should copy the code to your own source directory.
* Extensions can be found in the GoJS kit under the extensions or extensionsTS folders.
* See the Extensions intro page (https://gojs.net/latest/intro/extensions.html) for more information.
*/

import * as go from '../release/go.js';
import { RadialLayout } from './RadialLayout.js';

let myDiagram: go.Diagram;

class CustomRadialLayout extends RadialLayout {
  rotateNode(node: go.Node, angle: number, sweep: number, radius: number) {
    // rotate the nodes and make sure the text is not upside-down
    node.angle = angle;
    const label = node.findObject('TEXTBLOCK');
    if (label !== null) {
      label.angle = ((angle > 90 && angle < 270 || angle < -90) ? 180 : 0);
    }
  }

  commitLayers() {
    // optional: add circles in the background
    // need to remove any old ones first
    const diagram = this.diagram;
    if (diagram === null) return;
    const gridlayer = diagram.findLayer('Grid');
    if (gridlayer === null) return;
    const root = this.root;
    if (root === null) return;
    const circles = new go.Set<go.Part>();
    gridlayer.parts.each(function(circle) {
      if (circle.name === 'CIRCLE') circles.add(circle);
    });
    circles.each(function(circle) {
      diagram.remove(circle);
    });
    // add circles centered at the root
    const $$ = go.GraphObject.make;  // for conciseness in defining templates
    for (let lay = 1; lay <= this.maxLayers; lay++) {
      const radius = lay * this.layerThickness;
      const circle =
        $$(go.Part,
          { name: 'CIRCLE', layerName: 'Grid' },
          { locationSpot: go.Spot.Center, location: root.location },
          $$(go.Shape, 'Circle',
            { width: radius * 2, height: radius * 2 },
            { fill: 'rgba(200,200,200,0.2)', stroke: null }));
      diagram.add(circle);
    }
  }

}

export function init() {
  if ((window as any).goSamples) (window as any).goSamples();  // init for these samples -- you don't need to call this

  const $ = go.GraphObject.make;  // for conciseness in defining templates

  myDiagram =
    $(go.Diagram, 'myDiagramDiv', // must be the ID or reference to div
      {
        initialAutoScale: go.Diagram.Uniform,
        padding: 10,
        isReadOnly: true,
        layout: $(CustomRadialLayout, { maxLayers: 2 }),
        'animationManager.isEnabled': false
      });

  // shows when hovering over a node
  const commonToolTip =
    $<go.Adornment>('ToolTip',
      $(go.Panel, 'Vertical',
        { margin: 3 },
        $(go.TextBlock,  // bound to node data
          { margin: 4, font: 'bold 12pt sans-serif' },
          new go.Binding('text')),
        $(go.TextBlock,  // bound to node data
          new go.Binding('text', 'color', function(c) { return 'Color: ' + c; })),
        $(go.TextBlock,  // bound to Adornment because of call to Binding.ofObject
          new go.Binding('text', '', function(ad) { return 'Connections: ' + ad.adornedPart.linksConnected.count; }).ofObject())
      )  // end Vertical Panel
    );  // end Adornment

  // define the Node template
  myDiagram.nodeTemplate =
    $(go.Node, 'Spot',
      {
        locationSpot: go.Spot.Center,
        locationObjectName: 'SHAPE',  // Node.location is the center of the Shape
        selectionAdorned: false,
        click: nodeClicked,
        toolTip: commonToolTip
      },
      $(go.Shape, 'Circle',
        {
          name: 'SHAPE',
          fill: 'lightgray',  // default value, but also data-bound
          stroke: 'transparent',
          strokeWidth: 2,
          desiredSize: new go.Size(20, 20),
          portId: ''  // so links will go to the shape, not the whole node
        },
        new go.Binding('fill', 'color')),
      $(go.TextBlock,
        {
          name: 'TEXTBLOCK',
          alignment: go.Spot.Right,
          alignmentFocus: go.Spot.Left
        },
        new go.Binding('text'))
    );

  // this is the root node, at the center of the circular layers
  myDiagram.nodeTemplateMap.add('Root',
    $(go.Node, 'Auto',
      {
        locationSpot: go.Spot.Center,
        selectionAdorned: false,
        toolTip: commonToolTip
      },
      $(go.Shape, 'Circle',
        { fill: 'white' }),
      $(go.TextBlock,
        { font: 'bold 12pt sans-serif', margin: 5 },
        new go.Binding('text'))
    ));

  // define the Link template
  myDiagram.linkTemplate =
    $(go.Link,
      {
        routing: go.Link.Normal,
        curve: go.Link.Bezier,
        selectionAdorned: false,
        layerName: 'Background'
      },
      $(go.Shape,
        {
          stroke: 'black',  // default value, but is data-bound
          strokeWidth: 1
        },
        new go.Binding('stroke', 'color'))
    );

  generateGraph();
}

function generateGraph() {
  const names = [
    'Joshua', 'Daniel', 'Robert', 'Noah', 'Anthony',
    'Elizabeth', 'Addison', 'Alexis', 'Ella', 'Samantha',
    'Joseph', 'Scott', 'James', 'Ryan', 'Benjamin',
    'Walter', 'Gabriel', 'Christian', 'Nathan', 'Simon',
    'Isabella', 'Emma', 'Olivia', 'Sophia', 'Ava',
    'Emily', 'Madison', 'Tina', 'Elena', 'Mia',
    'Jacob', 'Ethan', 'Michael', 'Alexander', 'William',
    'Natalie', 'Grace', 'Lily', 'Alyssa', 'Ashley',
    'Sarah', 'Taylor', 'Hannah', 'Brianna', 'Hailey',
    'Christopher', 'Aiden', 'Matthew', 'David', 'Andrew',
    'Kaylee', 'Juliana', 'Leah', 'Anna', 'Allison',
    'John', 'Samuel', 'Tyler', 'Dylan', 'Jonathan'
  ];

  const nodeDataArray = [];
  for (let i = 0; i < names.length; i++) {
    nodeDataArray.push({ key: i, text: names[i], color: go.Brush.randomColor(128, 240) });
  }

  const linkDataArray = [];
  const num = nodeDataArray.length;
  for (let i = 0; i < num * 2; i++) {
    const a = Math.floor(Math.random() * num);
    const b = Math.floor(Math.random() * num / 4) + 1;
    linkDataArray.push({ from: a, to: (a + b) % num, color: go.Brush.randomColor(0, 127) });
  }

  myDiagram.model = new go.GraphLinksModel(nodeDataArray, linkDataArray);

  const someone = nodeDataArray[Math.floor(Math.random() * nodeDataArray.length)];
  nodeClicked(null, myDiagram.findNodeForData(someone));
}

function nodeClicked(e: go.InputEvent | null, root: go.GraphObject| null) {
  if (!(root instanceof go.Node)) return;
  const diagram = root.diagram;
  if (diagram === null) return;
  // all other nodes should be visible and use the default category
  diagram.nodes.each(function(n) {
    n.visible = true;
    if (n !== root) n.category = '';
  });
  // make this Node the root
  root.category = 'Root';
  // tell the RadialLayout what the root node should be
  (diagram.layout as RadialLayout).root = root;
  diagram.layoutDiagram(true);
}

// called when "Set Max Layers" button is clicked
export function adjustMaxLayers() {
  const newMaxLayers = parseInt((document.getElementById('maxLayersChanger') as any).value);
  function isInteger(val: any) {
    return typeof val === 'number' &&
      isFinite(val) &&
      Math.floor(val) === val;
  }
  if (!isInteger(newMaxLayers) || newMaxLayers < 1 || newMaxLayers > 10) {
    alert('Please enter an integer larger than zero and less than or equal to 10.');
  } else {
    const lay = myDiagram.layout as RadialLayout;
    lay.maxLayers = Math.max(1, Math.min(newMaxLayers, 10));
    nodeClicked(null, lay.root);
  }
}
