import * as _ from 'lodash-es';
import { Graph } from '../graphlib/index.js';
import * as util from './util.js';

export { debugOrdering };

/* istanbul ignore next */
function debugOrdering(g) {
  var layerMatrix = util.buildLayerMatrix(g);

  var h = new Graph({ compound: true, multigraph: true }).setGraph({});

  _.forEach(g.nodes(), function (v) {
    h.setNode(v, { label: v });
    h.setParent(v, 'layer' + g.node(v).rank);
  });

  _.forEach(g.edges(), function (e) {
    h.setEdge(e.v, e.w, {}, e.name);
  });

  _.forEach(layerMatrix, function (layer, i) {
    var layerV = 'layer' + i;
    h.setNode(layerV, { rank: 'same' });
    _.reduce(layer, function (u, v) {
      h.setEdge(u, v, { style: 'invis' });
      return v;
    });
  });

  return h;
}