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

const html = fs.readFileSync(new URL('../www/index.html', import.meta.url), 'utf8');
const main = fs.readFileSync(new URL('../www/main.js', import.meta.url), 'utf8');
const options = fs.readFileSync(new URL('../www/ui/options.js', import.meta.url), 'utf8');
const realtime = fs.readFileSync(new URL('../www/views/realtime.js', import.meta.url), 'utf8');

const styleSelect = html.match(/<select\b[^>]*\bid="styleSel"[^>]*>/)?.[0] || '';
assert(styleSelect, 'style selector is missing');
assert(!/\bopt-w-\d+\b/.test(styleSelect), 'style selector must not have a fixed-width utility class');
assert(/adjustStyleDropdownWidth\(\)/.test(main), 'dynamic style selector sizing is missing');
assert(/styleSel\.style\.width\s*=/.test(main), 'dynamic style selector width assignment is missing');

assert(!/syncNativePeakHold/.test(realtime),
  'native RTA peak anchors must not be copied directly into the visible hold line');
assert((realtime.match(/applyPeakHold\(state, integrated, CONFIG, range\)/g) || []).length >= 3,
  'every RTA engine must advance peak hold on the display clock');
assert(/useIirEngine[^]*?applyRealtimeBarBallistics\(state, displayBase, CONFIG, range\)/.test(realtime),
  'native IIR bars must advance their visible release on the display clock');
assert(/h\('opt_rtaFreq', v => \{\s*CONFIG\.RTA_FREQ_RANGE = \(v === 'lf'\) \? 'lf' : 'norm'/.test(options),
  'the low-frequency range must remain selectable in the RTW layout');
assert(!/RTA_FREQ_RANGE\s*=\s*CONFIG\.RTA_BAR_LAYOUT\s*===\s*'rtw'\s*\?\s*'norm'/.test(options),
  'the RTW layout must not force the normal frequency range');

console.log('GUI contract regression tests passed');