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

const { Reactor_CSTR } = require('../../src/specificClass');
const nodeClass = require('../../src/nodeClass');
const { makeReactorConfig, makeUiConfig, makeNodeStub, makeREDStub } = require('../helpers/factories');

/**
 * Smoke tests for Fix 3: configurable speedUpFactor on Reactor.
 */

test('specificClass defaults speedUpFactor to 1 when not in config', () => {
  const config = makeReactorConfig();
  const reactor = new Reactor_CSTR(config);
  assert.equal(reactor.speedUpFactor, 1, 'speedUpFactor should default to 1');
});

test('specificClass accepts speedUpFactor from config', () => {
  const config = makeReactorConfig();
  config.speedUpFactor = 10;
  const reactor = new Reactor_CSTR(config);
  assert.equal(reactor.speedUpFactor, 10, 'speedUpFactor should be read from config');
});

test('specificClass accepts speedUpFactor = 60 for accelerated simulation', () => {
  const config = makeReactorConfig();
  config.speedUpFactor = 60;
  const reactor = new Reactor_CSTR(config);
  assert.equal(reactor.speedUpFactor, 60, 'speedUpFactor=60 should be accepted');
});

test('nodeClass passes speedUpFactor from uiConfig to reactor config', () => {
  const uiConfig = makeUiConfig({ speedUpFactor: 5 });
  const node = makeNodeStub();
  const RED = makeREDStub();

  const nc = new nodeClass(uiConfig, RED, node, 'test-reactor');
  assert.equal(nc.source.speedUpFactor, 5, 'nodeClass should pass speedUpFactor=5 to specificClass');
});

test('nodeClass defaults speedUpFactor to 1 when not in uiConfig', () => {
  const uiConfig = makeUiConfig();
  // Ensure speedUpFactor is not set
  delete uiConfig.speedUpFactor;

  const node = makeNodeStub();
  const RED = makeREDStub();

  const nc = new nodeClass(uiConfig, RED, node, 'test-reactor');
  assert.equal(nc.source.speedUpFactor, 1, 'nodeClass should default speedUpFactor to 1');
});

test('updateState with speedUpFactor=1 advances roughly real-time', () => {
  const config = makeReactorConfig();
  config.speedUpFactor = 1;
  config.n_inlets = 1;
  const reactor = new Reactor_CSTR(config);

  // Set a known start time
  const t0 = reactor.currentTime;
  // Advance by 2 seconds real time
  reactor.updateState(t0 + 2000);

  // With speedUpFactor=1, simulation should have advanced ~2 seconds worth
  // (not 120 seconds like with the old hardcoded 60x factor)
  const elapsed = reactor.currentTime - t0;
  assert.ok(elapsed < 5000, `Elapsed ${elapsed}ms should be close to 2000ms, not 120000ms (old 60x factor)`);
});