/**
 * Payload is ESM-only and next/jest will not transform it, so the collections
 * cannot be imported and their sanitised config inspected here (see
 * lib/payloadRoutes.ts for the full reasoning). These assert the source of the
 * collection definitions instead — enough to catch the settings whose loss is
 * silent, and cheap. Behaviour is proved by the e2e journeys against staging.
 */
import fs from 'fs';
import path from 'path';

const read = (file: string) =>
  fs.readFileSync(path.join(__dirname, '..', '..', 'collections', file), 'utf8');

const POSTS = read('Posts.ts');
const MEDIA = read('Media.ts');
const CONFIG = fs.readFileSync(
  path.join(__dirname, '..', '..', 'payload.config.ts'),
  'utf8',
);

describe('posts collection', () => {
  it('supports drafts, so saving is not publishing', () => {
    expect(POSTS).toMatch(/drafts:\s*true/);
  });

  it('has a unique, indexed slug for stable URLs', () => {
    const slugField = POSTS.slice(POSTS.indexOf("name: 'slug'"));
    expect(slugField).toMatch(/unique:\s*true/);
    expect(slugField).toMatch(/index:\s*true/);
  });

  it('hides drafts from anonymous readers at the access layer', () => {
    // Payload's docs are explicit: "The `draft` argument alone does not
    // restrict documents with _status: 'draft' from being returned by the
    // API." The blog pages' where-clause is not enforcement — a direct GET
    // /cms-api/posts would return unpublished drafts to anyone. Access
    // control returning a query constraint is the only thing that stops it.
    expect(POSTS).toMatch(/_status:\s*\{\s*equals:\s*'published'\s*\}/);
    expect(POSTS).toMatch(/if\s*\(req\.user\)\s*return true/);
  });

  it('revalidates the post page when a post changes or is deleted', () => {
    // /blog/[slug] is ISR — generated on first request and cached — so an edit
    // to an already-published post would otherwise not appear until the
    // revalidate window expired, up to an hour of a writer concluding that
    // saving is broken. The index and feeds are force-dynamic and need no hook.
    expect(POSTS).toContain('afterChange');
    expect(POSTS).toContain('afterDelete');
    expect(POSTS).toMatch(/revalidatePath\(`\/blog\/\$\{[^}]+\}`\)/);
  });
});

describe('media collection', () => {
  it('writes uploads to the mounted volume, by absolute path', () => {
    // Must match the payload_media mount in docker-compose.portainer.yml.
    // Payload 3 requires staticDir to be absolute.
    expect(MEDIA).toMatch(/staticDir:\s*'\/app\/media'/);
  });

  it('requires alt text on every upload', () => {
    const altField = MEDIA.slice(MEDIA.indexOf("name: 'alt'"));
    expect(altField).toMatch(/required:\s*true/);
  });
});

describe('payload config', () => {
  it('registers every collection', () => {
    expect(CONFIG).toMatch(/collections:\s*\[Users,\s*Posts,\s*Media\]/);
  });
});