import assert from 'node:assert/strict';
import fs from 'node:fs';
import vm from 'node:vm';

const source = fs.readFileSync(new URL('../www/core/audio.js', import.meta.url), 'utf8');
const functionSource = source.match(/export function buildRtaRuntimeConfig[\s\S]*?\n\}/)?.[0];
assert.ok(functionSource, 'buildRtaRuntimeConfig must remain testable');
const context = vm.createContext({
  Number,
  getRtwCenters(mode) {
    return mode === '1_3' ? new Array(31).fill(0) : [];
  },
});
vm.runInContext(functionSource.replace('export function', 'function'), context);

const forced = context.buildRtaRuntimeConfig({
  RTA_BAR_LAYOUT: 'rtw',
  RTA_ENGINE: 'fft',
  RTA_BPO_MODE: '1_12',
  RTA_FREQ_RANGE: 'lf',
  RTA_IIR_ORDER: 2,
});
assert.equal(forced.engine, 'iir');
assert.equal(forced.bpo, '1_3');
assert.equal(forced.freqRange, 'norm');
assert.equal(forced.order, 6);
assert.equal(forced.rtwCenters.length, 31);

const extension = context.buildRtaRuntimeConfig({
  RTA_BAR_LAYOUT: 'iec',
  RTA_ENGINE: 'fft',
  RTA_BPO_MODE: '1_12',
  RTA_FREQ_RANGE: 'lf',
  RTA_IIR_ORDER: 8,
});
assert.equal(extension.engine, 'fft');
assert.equal(extension.bpo, '1_12');
assert.equal(extension.freqRange, 'lf');
assert.equal(extension.order, 8);

console.log('RTA profile regression tests passed');