import { test } from 'node:test';
import assert from 'node:assert/strict';
import { parseTrailers, agentSlug } from '../src/lib/trailers.js';

test('parses standard Co-Authored-By trailer', () => {
  const msg = 'fix: thing\n\nCo-Authored-By: Claude Fable 5 <noreply@anthropic.com>';
  assert.deepEqual(parseTrailers(msg), [{ name: 'Claude Fable 5', email: 'noreply@anthropic.com' }]);
});

test('case-insensitive and tolerant spacing', () => {
  const msg = 'x\nco-authored-by:  Codex Bot   <codex@openai.com> ';
  assert.deepEqual(parseTrailers(msg), [{ name: 'Codex Bot', email: 'codex@openai.com' }]);
});

test('multiple distinct trailers', () => {
  const msg = 'x\nCo-Authored-By: A <a@x.com>\nCo-Authored-By: B <b@x.com>';
  assert.equal(parseTrailers(msg).length, 2);
});

test('dedupes identical trailers', () => {
  const msg = 'x\nCo-Authored-By: A <a@x.com>\nCo-authored-by: A <A@X.com>';
  assert.equal(parseTrailers(msg).length, 1);
});

test('trailer without email', () => {
  const msg = 'x\nCo-Authored-By: Mystery Agent';
  assert.deepEqual(parseTrailers(msg), [{ name: 'Mystery Agent', email: '' }]);
});

test('ignores non-trailer lines', () => {
  assert.deepEqual(parseTrailers('Co-Authored-By appears in prose but not as trailer: nope\nplain line'), []);
  assert.deepEqual(parseTrailers(''), []);
  assert.deepEqual(parseTrailers(null), []);
});

test('agentSlug from email localpart', () => {
  assert.equal(agentSlug({ name: 'Claude Fable 5', email: 'noreply@anthropic.com' }), 'noreply');
});

test('agentSlug from name when no email', () => {
  assert.equal(agentSlug({ name: 'My Agent!', email: '' }), 'my-agent');
});