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

import { contextForUser } from './helpers';

const BASE_URL = process.env.E2E_BASE_URL ?? 'http://localhost:5173';

/**
 * Fine-grained access rules (issue #55): both vision patterns are configured
 * through the pond-settings UI and their effect is verified end to end —
 * "deny label X" (an editor loses a labelled page) and "only label Y" (a
 * signed-in non-member reads only the labelled pages). Also covers the
 * shadowed-rule hint and the public confirmation.
 */

async function json<T>(
  ctx: APIRequestContext,
  method: 'post',
  path: string,
  data: unknown,
): Promise<T> {
  const res = await ctx[method](path, { data });
  if (!res.ok()) throw new Error(`${method} ${path} → ${res.status()} ${await res.text()}`);
  return (await res.json()) as T;
}

const meId = async (ctx: BrowserContext): Promise<string> =>
  ((await (await ctx.request.get('/api/v1/auth/me')).json()) as { id: string }).id;

const tokenStatus = async (ctx: BrowserContext, pageId: string): Promise<number> =>
  (await ctx.request.get(`/api/v1/pages/${pageId}/collab-token`)).status();

const tokenMode = async (ctx: BrowserContext, pageId: string): Promise<string | number> => {
  const res = await ctx.request.get(`/api/v1/pages/${pageId}/collab-token`);
  return res.ok() ? ((await res.json()) as { mode: string }).mode : res.status();
};

test('both vision patterns are configurable in the UI and take effect', async ({ browser }) => {
  const owner = await contextForUser(browser, BASE_URL, 'fixture-user');
  const editor = await contextForUser(browser, BASE_URL, 'fixture-editor');
  const viewer = await contextForUser(browser, BASE_URL, 'fixture-viewer');
  const editorId = await meId(editor);

  const pond = await json<{ id: string; slug: string }>(owner.request, 'post', '/api/v1/ponds', {
    name: `Access ${Date.now()}`,
  });
  await json(owner.request, 'post', `/api/v1/ponds/${pond.id}/members`, {
    usernameOrEmail: 'fixture-editor',
    role: 'editor',
  });
  const labelX = await json<{ id: string }>(
    owner.request,
    'post',
    `/api/v1/ponds/${pond.id}/labels`,
    {
      name: 'Confidential',
    },
  );
  const labelY = await json<{ id: string }>(
    owner.request,
    'post',
    `/api/v1/ponds/${pond.id}/labels`,
    {
      name: 'Handbook',
    },
  );
  const px = await json<{ id: string }>(owner.request, 'post', `/api/v1/ponds/${pond.id}/pages`, {
    title: 'Secret',
  });
  const py = await json<{ id: string }>(owner.request, 'post', `/api/v1/ponds/${pond.id}/pages`, {
    title: 'Guide',
  });
  const pz = await json<{ id: string }>(owner.request, 'post', `/api/v1/ponds/${pond.id}/pages`, {
    title: 'Misc',
  });
  await json(owner.request, 'post', `/api/v1/pages/${px.id}/labels`, { labelId: labelX.id });
  await json(owner.request, 'post', `/api/v1/pages/${py.id}/labels`, { labelId: labelY.id });

  // Baseline: the editor may write every page.
  expect(await tokenMode(editor, px.id)).toBe('rw');

  const page = await owner.newPage();
  await page.goto(`/p/${pond.slug}/settings`);

  // Pattern 1 — "deny label X": the editor may not touch Confidential pages.
  await page.locator('.rule-add__subject').selectOption(`user:${editorId}`);
  await page.locator('.rule-add__scope-type').selectOption('label');
  await page.locator('.rule-add__scope-target').selectOption(labelX.id);
  await page.locator('.rule-add__role').selectOption('editor');
  await page.locator('.rule-add__effect').selectOption('deny');
  await page.locator('.rule-add__submit').click();
  await expect(page.locator('.rule-sentence', { hasText: 'Confidential' })).toBeVisible();

  await expect.poll(() => tokenStatus(editor, px.id)).toBe(404); // labelled page now hidden
  expect(await tokenMode(editor, pz.id)).toBe('rw'); // unlabelled page still editable

  // Pattern 2 — "only label Y": signed-in users read only Handbook pages.
  await page.locator('.rule-add__subject').selectOption('authenticated');
  await page.locator('.rule-add__scope-type').selectOption('label');
  await page.locator('.rule-add__scope-target').selectOption(labelY.id);
  await page.locator('.rule-add__role').selectOption('reader');
  await page.locator('.rule-add__effect').selectOption('allow');
  await page.locator('.rule-add__submit').click();
  await expect(page.locator('.rule-sentence', { hasText: 'Handbook' })).toBeVisible();

  // A signed-in non-member reads the labelled page, nothing else.
  await expect.poll(() => tokenMode(viewer, py.id)).toBe('ro');
  expect(await tokenStatus(viewer, px.id)).toBe(404);
  expect(await tokenStatus(viewer, pz.id)).toBe(404);

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

test('hints at shadowed rules and confirms before going public', async ({ browser }) => {
  const owner = await contextForUser(browser, BASE_URL, 'fixture-user');
  const editor = await contextForUser(browser, BASE_URL, 'fixture-editor');
  const editorId = await meId(editor);

  const pond = await json<{ id: string; slug: string }>(owner.request, 'post', '/api/v1/ponds', {
    name: `Access2 ${Date.now()}`,
  });
  await json(owner.request, 'post', `/api/v1/ponds/${pond.id}/members`, {
    usernameOrEmail: 'fixture-editor',
    role: 'editor',
  });
  const label = await json<{ id: string }>(
    owner.request,
    'post',
    `/api/v1/ponds/${pond.id}/labels`,
    {
      name: 'Docs',
    },
  );
  const pg = await json<{ id: string }>(owner.request, 'post', `/api/v1/ponds/${pond.id}/pages`, {
    title: 'Page',
  });
  // A more specific existing rule (page-scope deny) will shadow a label-scope allow.
  await json(owner.request, 'post', `/api/v1/ponds/${pond.id}/grants`, {
    subjectType: 'user',
    subjectId: editorId,
    role: 'editor',
    scopeType: 'page',
    scopeId: pg.id,
    effect: 'deny',
  });

  const page = await owner.newPage();
  await page.goto(`/p/${pond.slug}/settings`);

  // Shadowed: a label-scope allow for the same editor, opposite to the page deny.
  await page.locator('.rule-add__subject').selectOption(`user:${editorId}`);
  await page.locator('.rule-add__scope-type').selectOption('label');
  await page.locator('.rule-add__scope-target').selectOption(label.id);
  await page.locator('.rule-add__role').selectOption('editor');
  await page.locator('.rule-add__effect').selectOption('allow');
  await expect(page.locator('.rule-add__shadow')).toBeVisible();

  // Public + allow: a confirmation gate blocks submission until acknowledged.
  await page.locator('.rule-add__subject').selectOption('public');
  await expect(page.locator('.rule-add__public-warning')).toBeVisible();
  await expect(page.locator('.rule-add__submit')).toBeDisabled();
  await page.locator('.rule-add__public-confirm').check();
  await expect(page.locator('.rule-add__submit')).toBeEnabled();

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