// Choosing a chat model should not mean scrolling past rerankers, image models
// and speech models. /v1/models carries no mode, so the list had everything the
// gateway serves; /model/info does carry it, which is where every other
// discovery endpoint already looks.
const test = require('node:test');
const assert = require('node:assert/strict');
const fs = require('node:fs');
const path = require('node:path');

const route = fs.readFileSync(path.join(__dirname, '..', 'src/routes/adminConfig.js'), 'utf8');

test('every non-chat mode the gateway reports is excluded', () => {
  assert.match(route, /var NON_CHAT_MODES = /);
  for (const mode of ['image_generation', 'rerank', 'audio_speech', 'audio_transcription', 'embedding']) {
    assert.ok(route.includes("'" + mode + "'"), mode + ' is not excluded');
  }
});

test('a model with no mode is kept — unknown is not disqualified', () => {
  // Requiring a positive 'chat' would hide every model the gateway has no
  // metadata for, which on this roster is most of them.
  assert.match(route, /excludes what the\n\/\/ gateway says is something else, rather than requiring it to say 'chat'/);
  const fn = route.slice(route.indexOf('async function nonChatModelIds'));
  assert.match(fn.slice(0, 900), /NON_CHAT_MODES\.indexOf\(liteLLMModelMode\(m\)\) !== -1/);
  assert.doesNotMatch(fn.slice(0, 900), /mode === 'chat'/);
});

test('unreachable metadata filters nothing rather than emptying the list', () => {
  const fn = route.slice(route.indexOf('async function nonChatModelIds'));
  assert.match(fn.slice(0, 1100), /catch \(e\) \{[\s\S]{0,160}return new Set\(\)/);
  assert.match(fn, /No metadata means no filtering, which is what it did before/);
});

test('the filter runs before the search, so a search cannot reveal a hidden model', () => {
  const handler = route.slice(route.indexOf("router.get('/config/models/discover'"));
  const filter = handler.indexOf('exclude.has(m.id)');
  const search = handler.indexOf('req.query.q');
  assert.ok(filter > -1 && filter < search, 'exclusion must precede the search filter');
});