// Adding a model in the Models card has to reach every picker that lists models.
// It used to refresh the default-model dropdown alone, so a newly added model
// was invisible in the Clinical Assistant, review-model and image pickers until
// the page was reloaded — which is not obvious, and looks like the add failed.
const test = require('node:test');
const assert = require('node:assert/strict');
const fs = require('node:fs');
const path = require('node:path');

const read = f => fs.readFileSync(path.join(__dirname, '..', f), 'utf8');

test('every mutation of the model roster announces it', () => {
  const admin = read('public/js/admin.js');
  assert.match(admin, /function announceModelsChanged\(\)/);
  assert.match(admin, /new CustomEvent\('models-changed'\)/);

  // Add, remove, clear-all and enable/disable each change what is selectable.
  const announced = (admin.match(/announceModelsChanged\(\);/g) || []).length;
  assert.ok(announced >= 4, 'expected an announcement on add, remove, clear and toggle; found ' + announced);

  for (const [label, marker] of [
    ['add-discovered', "config/models/add-discovered"],
    ['remove custom', "config/models/custom/"],
    ['clear all', "config/models/clear-all"],
    ['toggle', "config/models/toggle"]
  ]) {
    const at = admin.indexOf(marker);
    assert.ok(at > -1, label + ' call site missing');
    // The announcement lives inside that call's success branch.
    assert.ok(admin.slice(at, at + 900).includes('announceModelsChanged()'),
      label + ' does not announce the change');
  }
});

test('the pickers listen, and re-run a loader that is otherwise once-per-visit', () => {
  const assistant = read('public/js/admin/clinicalAssistant.js');
  assert.match(assistant, /document\.addEventListener\('models-changed'/);
  // Its guard must be cleared, or the listener fires and the loader returns early.
  assert.match(assistant, /configState = 'idle';\s*\n\s*loadAssistantAdmin\(\);/);
  assert.match(assistant, /if \(configState === 'loading'\) return;/, 'no reload mid-flight');

  const images = read('public/js/admin/imageSettings.js');
  assert.match(images, /document\.addEventListener\('models-changed'/);
  assert.match(images, /loaded = false;\s*\n\s*load\(\);/);
  assert.match(images, /if \(loading\) return;/, 'no reload mid-flight');
});

test('every model picker listens, not only the two in the admin cards', () => {
  // The point is that a model added in Admin is selectable wherever models are
  // chosen — the per-tab selectors and My Resources included, not just the
  // admin's own dropdowns.
  const app = read('public/js/app.js');
  assert.match(app, /document\.addEventListener\('models-changed'/);
  assert.match(app, /function loadModelList\(\)/, 'the boot fetch is reusable, not inline');

  const resources = read('public/js/myResources.js');
  assert.match(resources, /document\.addEventListener\('models-changed'/);
  assert.match(resources, /if \(inited\) loadOptions\(\);/, 'nothing to refresh before the tab has initialised');
});

test('a refresh never moves someone off the model they picked', () => {
  // These selects are rebuilt while a form may be half filled in.
  const app = read('public/js/app.js');
  assert.match(app, /var chosen = sel\.value;[\s\S]{0,260}sel\.value = chosen;/);
  const resources = read('public/js/myResources.js');
  assert.match(resources, /var chosen = select\.value;[\s\S]{0,420}select\.value = chosen;/);
});

test('the toast no longer tells people to go and set a default', () => {
  // It used to say "now select it as default and click Set Default", which was
  // advice for the one dropdown that did refresh.
  const admin = read('public/js/admin.js');
  assert.doesNotMatch(admin, /now select it as default and click Set Default/);
  assert.match(admin, /selectable everywhere models are chosen/);
});