import { expect, test } from '@playwright/test';

import { contextForUser } from './helpers';

/**
 * Create-from-not-found pack (issue #115): following a phantom wikilink dead-
 * ends on the not-found screen, which offers creating the page in place —
 * title = the slug, so every link pointing at the address resolves (#47).
 * Readers hit the 403 banner instead (the affordance is ungated by design).
 * Wired into CI with the vault-import pack (#119).
 */
const BASE_URL = process.env.E2E_BASE_URL ?? 'http://localhost:5173';

async function insertWikilink(page: import('@playwright/test').Page, query: string): Promise<void> {
  const body = page.locator('.editor-content .ProseMirror');
  await body.click();
  await page.keyboard.type(`[[${query}`);
  await expect(page.locator('.wikilink-suggest')).toBeVisible();
  await page.keyboard.press('Enter');
}

test('not-found screen creates the missing page in place', async ({ browser }) => {
  const context = await contextForUser(browser, BASE_URL, 'fixture-user');
  const ponds = await context.request.get('/api/v1/ponds');
  const pond = (await ponds.json()).find((p: { type: string }) => p.type === 'personal');
  const ts = Date.now();
  const source = await (
    await context.request.post(`/api/v1/ponds/${pond.id}/pages`, {
      data: { title: `NF Source ${ts}` },
    })
  ).json();

  const page = await context.newPage();
  // Author a phantom wikilink, then follow it in read mode.
  await page.goto(`/p/${pond.slug}/${source.slug}`);
  await page.locator('.editor-page__mode-toggle').click();
  await insertWikilink(page, `nf-ghost-${ts}`);
  await page.locator('.editor-page__mode-toggle').click(); // back to read mode
  await page.locator('.editor-content a.wikilink', { hasText: `nf-ghost-${ts}` }).click();

  // Dead end shows the message AND the way out.
  await expect(page).toHaveURL(new RegExp(`/p/${pond.slug}/nf-ghost-${ts}$`));
  await expect(page.locator('.form-banner--error, [role="alert"]').first()).toBeVisible();
  const createButton = page.locator('.create-missing-page__button');
  await expect(createButton).toBeVisible();

  // Create → the editor mounts on the same URL.
  await createButton.click();
  await expect(page.locator('.editor-content .ProseMirror')).toBeVisible();
  await expect(page).toHaveURL(new RegExp(`/p/${pond.slug}/nf-ghost-${ts}$`));

  // The source's backlink panel proves the link resolved (id-based).
  await page.reload();
  await expect(page.locator('.backlinks')).toBeVisible();
  await expect(page.locator('.backlinks__link', { hasText: `NF Source ${ts}` })).toBeVisible();

  await context.close();
});

test('a viewer without edit rights hits the 403 banner instead', async ({ browser }) => {
  const owner = await contextForUser(browser, BASE_URL, 'fixture-user');
  const viewer = await contextForUser(browser, BASE_URL, 'fixture-viewer');
  const viewerId = (await (await viewer.request.get('/api/v1/auth/me')).json()).id as string;
  const ts = Date.now();
  const pond = await (
    await owner.request.post('/api/v1/ponds', { data: { name: `NF Pond ${ts}` } })
  ).json();
  await owner.request.post(`/api/v1/ponds/${pond.id}/grants`, {
    data: {
      subjectType: 'user',
      subjectId: viewerId,
      role: 'reader',
      scopeType: 'pond',
      effect: 'allow',
    },
  });

  const page = await viewer.newPage();
  await page.goto(`/p/${pond.slug}/does-not-exist-${ts}`);
  const createButton = page.locator('.create-missing-page__button');
  await expect(createButton).toBeVisible();
  await createButton.click();
  // The POST 403s for a reader; the banner appears, no editor mounts.
  await expect(page.locator('.create-missing-page .form-banner--error')).toBeVisible();
  await expect(page.locator('.editor-content .ProseMirror')).toHaveCount(0);

  await owner.close();
  await viewer.close();
});