import type { FieldValue } from '../../../model/Properties';
import type { NodeDef } from '../../NodeRegistry';
import { asField } from '../../values';
import { struct } from '../shared';

/**
 * Bundles its declared inputs into one struct, so a group of values travels along a single edge
 * instead of one edge per part. The counterpart of Expand.
 */
export const PackStruct: NodeDef = {
  type: 'PackStruct',
  label: 'Pack',
  category: 'data',
  description: 'Bundles named values into one struct, one input per field.',
  inputs: [],
  outputs: [struct('value')],
  params: [],
  declaresPorts: 'inputs',
  run: (_ctx, inputs) => {
    const fields: Record<string, FieldValue> = {};
    for (const [field, value] of Object.entries(inputs)) fields[field] = asField(value);
    return { outputs: { value: fields } };
  },
};