const test = require('node:test');
const assert = require('node:assert/strict');

const NodeClass = require('../../src/nodeClass');
const { makeNodeStub, makeREDStub } = require('../helpers/factories');

test('_attachInputHandler routes supported topics to source methods/setters', () => {
  const inst = Object.create(NodeClass.prototype);
  const node = makeNodeStub();
  const calls = [];

  const source = {
    updateState(timestamp) {
      calls.push(['clock', timestamp]);
    },
    childRegistrationUtils: {
      registerChild(childSource, position) {
        calls.push(['registerChild', childSource, position]);
      },
    },
  };

  Object.defineProperty(source, 'setInfluent', {
    set(v) {
      calls.push(['Fluent', v]);
    },
  });

  Object.defineProperty(source, 'setOTR', {
    set(v) {
      calls.push(['OTR', v]);
    },
  });

  Object.defineProperty(source, 'setTemperature', {
    set(v) {
      calls.push(['Temperature', v]);
    },
  });

  Object.defineProperty(source, 'setDispersion', {
    set(v) {
      calls.push(['Dispersion', v]);
    },
  });

  inst.node = node;
  inst.RED = makeREDStub({
    childA: {
      source: { id: 'child-source-A' },
    },
  });
  inst.source = source;

  inst._attachInputHandler();

  const onInput = node._handlers.input;
  const sent = [];
  let doneCount = 0;

  onInput({ topic: 'clock', timestamp: 1000 }, (msg) => sent.push(msg), () => doneCount++);
  onInput({ topic: 'Fluent', payload: { inlet: 0, F: 10, C: [] } }, () => {}, () => doneCount++);
  onInput({ topic: 'OTR', payload: 3.5 }, () => {}, () => doneCount++);
  onInput({ topic: 'Temperature', payload: 18.2 }, () => {}, () => doneCount++);
  onInput({ topic: 'Dispersion', payload: 0.2 }, () => {}, () => doneCount++);
  onInput({ topic: 'registerChild', payload: 'childA', positionVsParent: 'upstream' }, () => {}, () => doneCount++);

  assert.equal(doneCount, 6);
  assert.equal(sent.length, 1);
  assert.equal(Array.isArray(sent[0]), true);
  assert.deepEqual(calls[0], ['clock', 1000]);
  assert.equal(calls.some((x) => x[0] === 'Fluent'), true);
  assert.equal(calls.some((x) => x[0] === 'OTR'), true);
  assert.equal(calls.some((x) => x[0] === 'Temperature'), true);
  assert.equal(calls.some((x) => x[0] === 'Dispersion'), true);
  assert.deepEqual(calls.at(-1), ['registerChild', { id: 'child-source-A' }, 'upstream']);
});