// Exercises the exact regression: an empty 200 body must throw, not resolve to undefined.
const { getJson, HttpError } = await import('/tmp/prt-test/client.mjs');

let pass = 0, fail = 0;
const check = (name, ok) => { ok ? (pass++, console.log('  PASS', name)) : (fail++, console.log('  FAIL', name)); };

// 1. Real endpoint still works.
const cat = await getJson('http://127.0.0.1:3500/api/catalog');
check('catalog loads', cat.products.length === 179);

// 2. Empty 200 body -> throws (previously: JSON.parse crash that killed Promise.all).
globalThis.fetch = async () => new Response('', { status: 200 });
try { await getJson('/empty'); check('empty body throws', false); }
catch (e) { check('empty body throws HttpError', e instanceof HttpError && /Empty response/.test(e.message)); }

// 3. 404 surfaces its status so the caller can show "not found" instead of an error.
globalThis.fetch = async () => new Response(JSON.stringify({error:'Not found'}), { status: 404 });
try { await getJson('/missing'); check('404 throws', false); }
catch (e) { check('404 carries status', e.status === 404 && e.message === 'Not found'); }

// 4. A transient failure is retried once and then succeeds.
let n = 0;
globalThis.fetch = async () => (++n === 1 ? new Response('', { status: 200 }) : new Response(JSON.stringify({ok:true}), { status: 200 }));
check('retries once then succeeds', (await getJson('/flaky')).ok === true && n === 2);

console.log(`\n${pass} passed, ${fail} failed`);
process.exit(fail ? 1 : 0);