import test from 'node:test';
import assert from 'node:assert';
import { safeImport } from '../_helpers/path.js';
import { FakeLLMClient } from '../_helpers/fakeLLMClient.js';

function skip(msg){ console.warn('[SKIP]', msg); }

test('LLMManager: circuit breaker opens after consecutive failures (optional)', async () => {
  const res = await safeImport('LLMManager');
  if (!res.ok) { skip(res.reason); return; }
  const L = res.mod;
  if (typeof L.__setClient !== 'function' || typeof L.__setRetryPolicy !== 'function') {
    skip('Missing __setClient/__setRetryPolicy hooks');
    return;
  }

  // Simule toujours 500
  const fakeFail = new FakeLLMClient({ plan: [{err:{statusCode:500}}] });
  fakeFail.invoke = async () => { throw Object.assign(new Error('500'), {statusCode:500}); };
  L.__setClient('mock', fakeFail);

  L.__setRetryPolicy({
    retries: 0,
    baseMs: 1,
    isTransient: (code) => [500].includes(code),
    openAfter: 3,   // <-- si ton impl gère ce champ
    cooldownMs: 100 // <-- idem
  });

  let fails = 0;
  for (let i=0; i<3; i++) {
    try { await L.callModel({ provider:'mock', model:'fake-1', input:`try-${i}` }); }
    catch(e){ fails++; }
  }
  assert.equal(fails, 3);

  // Après 3, le breaker devrait s'ouvrir (si implémenté)
  let breakerThrew = false;
  try { await L.callModel({ provider:'mock', model:'fake-1', input:'blocked' }); }
  catch(e){ breakerThrew = true; }
  // On accepte SKIP si non implémenté dans ta lib
  if (!breakerThrew) skip('Circuit breaker not implemented; test informational only');
});