import { describe, it, expect, beforeAll, beforeEach } from 'vitest';
import request from 'supertest';
import { setup } from './helpers.js';
import * as spaces from '../../lib/db/repos/spaces.js';
import * as links from '../../lib/db/repos/links.js';

let app, ownerHeaders, space;
const owner = { kind: 'user', id: null };

beforeAll(async () => { ({ app, ownerHeaders } = await setup()); });
beforeEach(async () => {
  space = await spaces.create({ slug: `s-${Date.now()}-${Math.random().toString(36).slice(2,5)}`, name: 'S' }, owner);
});

describe('pages routes', () => {
  it('POST creates page with revision', async () => {
    const res = await request(app).post(`/api/spaces/${space.id}/pages`).set(ownerHeaders)
      .send({ slug: 'intro', title: 'Intro', body_md: 'hello' });
    expect(res.status).toBe(201);
    const revs = await request(app).get(`/api/pages/${res.body.id}/revisions`).set(ownerHeaders);
    expect(revs.body.length).toBe(1);
    expect(revs.body[0].body_md).toBe('hello');
  });

  it('PATCH body_md adds another revision', async () => {
    const c = await request(app).post(`/api/spaces/${space.id}/pages`).set(ownerHeaders)
      .send({ slug: 'pg', title: 'PG', body_md: 'v1' });
    await request(app).patch(`/api/pages/${c.body.id}`).set(ownerHeaders)
      .send({ body_md: 'v2' });
    const revs = await request(app).get(`/api/pages/${c.body.id}/revisions`).set(ownerHeaders);
    expect(revs.body.length).toBe(2);
    expect(revs.body[0].body_md).toBe('v2');
    expect(revs.body[1].body_md).toBe('v1');
  });

  it('GET by-slug returns the page', async () => {
    await request(app).post(`/api/spaces/${space.id}/pages`).set(ownerHeaders)
      .send({ slug: 'lookup', title: 'L', body_md: '' });
    const res = await request(app)
      .get(`/api/spaces/${space.id}/pages/by-slug/lookup`).set(ownerHeaders);
    expect(res.status).toBe(200);
    expect(res.body.slug).toBe('lookup');
  });

  it('POST duplicate slug → 400', async () => {
    await request(app).post(`/api/spaces/${space.id}/pages`).set(ownerHeaders)
      .send({ slug: 'dup', title: 'A' });
    const res = await request(app).post(`/api/spaces/${space.id}/pages`).set(ownerHeaders)
      .send({ slug: 'dup', title: 'B' });
    expect(res.status).toBe(400);
  });

  it('GET /:id/backlinks returns links pointing at the page', async () => {
    const pageRes = await request(app).post(`/api/spaces/${space.id}/pages`).set(ownerHeaders)
      .send({ slug: 'target', title: 'Target' });
    const otherRes = await request(app).post(`/api/spaces/${space.id}/pages`).set(ownerHeaders)
      .send({ slug: 'src', title: 'Source' });
    await links.create('page', otherRes.body.id, 'page', pageRes.body.id, 'mentions');
    const res = await request(app).get(`/api/pages/${pageRes.body.id}/backlinks`).set(ownerHeaders);
    expect(res.status).toBe(200);
    expect(res.body.length).toBe(1);
    expect(res.body[0].from_id).toBe(otherRes.body.id);
    expect(res.body[0].source_title).toBe('Source');
  });

  it('DELETE returns 204 then GET → 404', async () => {
    const c = await request(app).post(`/api/spaces/${space.id}/pages`).set(ownerHeaders)
      .send({ slug: 'gone', title: 'Gone' });
    const del = await request(app).delete(`/api/pages/${c.body.id}`).set(ownerHeaders);
    expect(del.status).toBe(204);
    const g = await request(app).get(`/api/pages/${c.body.id}`).set(ownerHeaders);
    expect(g.status).toBe(404);
  });
});