import { describe, expect, test } from 'bun:test';
import { createRoutings, testClient } from './lib';
import { etag } from '../src';

const router = createRoutings();
router.get('/etag', async (c) => {
  c.header('ETag', '"etag-v1"');
  c.set('result', { ok: true, version: 1 });
});

const { theAPI } = await testClient({
  routings: [router],
  beforeInit: (theAPI) => {
    theAPI.app.use('*', etag());
  },
});

describe('etag', () => {

  test('GET /etag returns ETag header', async () => {
    const res = await theAPI.app.fetch(
      new Request('http://localhost:7788/etag'),
    );

    expect(res.status).toEqual(200);
    expect(res.headers.get('etag')).toBeTruthy();
  });

  test('GET /etag returns 304 when If-None-Match matches stable ETag', async () => {
    const firstRes = await theAPI.app.fetch(
      new Request('http://localhost:7788/etag'),
    );
    const etagHeader = firstRes.headers.get('etag');

    expect(etagHeader).toBeTruthy();

    const secondRes = await theAPI.app.fetch(
      new Request('http://localhost:7788/etag', {
        headers: {
          'If-None-Match': etagHeader || '',
        },
      }),
    );

    expect(secondRes.status).toEqual(304);
    expect(secondRes.headers.get('etag')).toEqual(etagHeader);
  });
});