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

import { contextForUser } from './helpers';

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

async function personalPond(context: BrowserContext): Promise<{ id: string; slug: string }> {
  const ponds = await context.request.get('/api/v1/ponds');
  const pond = (await ponds.json()).find((p: { type: string }) => p.type === 'personal');
  return { id: pond.id, slug: pond.slug };
}

/** Opens the page in edit mode and waits for the live connection to be up. */
async function openEditor(context: BrowserContext, pondSlug: string, slug: string): Promise<Page> {
  const page = await context.newPage();
  await page.goto(`/p/${pondSlug}/${slug}`);
  await page.getByRole('button', { name: /edit|bearbeiten/i }).click();
  await expect(page.locator('.ProseMirror')).toHaveAttribute('contenteditable', 'true');
  await expect(page.locator('.editor-connection')).toHaveAttribute('data-status', 'connected', {
    timeout: 15000,
  });
  return page;
}

test('two browsers editing one page converge (the milestone headline)', async ({ browser }) => {
  // fixture-user owns the pond; fixture-admin is a site admin and may modify it,
  // so both receive a read-write collab token under the interim access model.
  const owner = await contextForUser(browser, BASE_URL, 'fixture-user');
  const admin = await contextForUser(browser, BASE_URL, 'fixture-admin');
  const pond = await personalPond(owner);
  const created = await owner.request.post(`/api/v1/ponds/${pond.id}/pages`, {
    data: { title: `Collab Converge ${Date.now()}` },
  });
  const { slug } = await created.json();

  const pageA = await openEditor(owner, pond.slug, slug);
  const pageB = await openEditor(admin, pond.slug, slug);
  const editorA = pageA.locator('.ProseMirror');
  const editorB = pageB.locator('.ProseMirror');

  await editorA.click();
  await pageA.keyboard.type('AAA from owner ');
  await expect(editorB).toContainText('AAA from owner', { timeout: 10000 });

  await editorB.click();
  await pageB.keyboard.type('BBB from admin ');
  await expect(editorA).toContainText('BBB from admin', { timeout: 10000 });

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

test('offline edits continue locally and sync on reconnect', async ({ browser }) => {
  const owner = await contextForUser(browser, BASE_URL, 'fixture-user');
  const admin = await contextForUser(browser, BASE_URL, 'fixture-admin');
  const pond = await personalPond(owner);
  const created = await owner.request.post(`/api/v1/ponds/${pond.id}/pages`, {
    data: { title: `Collab Offline ${Date.now()}` },
  });
  const { slug } = await created.json();

  const pageA = await openEditor(owner, pond.slug, slug);
  const pageB = await openEditor(admin, pond.slug, slug);
  const editorA = pageA.locator('.ProseMirror');
  const editorB = pageB.locator('.ProseMirror');

  // Admin drops offline: the indicator reflects it and editing stays local.
  await admin.setOffline(true);
  await expect(pageB.locator('.editor-connection')).toHaveAttribute('data-status', 'offline', {
    timeout: 10000,
  });
  await editorB.click();
  await pageB.keyboard.type('written while offline ');
  await expect(editorB).toContainText('written while offline');
  // The owner, still online, has not received the offline edit.
  await expect(editorA).not.toContainText('written while offline');

  // Back online: the provider reconnects (re-fetching a fresh token) and the
  // offline edit converges to the other participant.
  await admin.setOffline(false);
  await expect(pageB.locator('.editor-connection')).toHaveAttribute('data-status', 'connected', {
    timeout: 20000,
  });
  await expect(editorA).toContainText('written while offline', { timeout: 20000 });

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

test('remote carets and the presence strip reflect participants (#37)', async ({ browser }) => {
  const owner = await contextForUser(browser, BASE_URL, 'fixture-user');
  const admin = await contextForUser(browser, BASE_URL, 'fixture-admin');
  const ownerMe = (await (await owner.request.get('/api/v1/auth/me')).json()) as {
    displayName: string;
  };
  const pond = await personalPond(owner);
  const created = await owner.request.post(`/api/v1/ponds/${pond.id}/pages`, {
    data: { title: `Collab Presence ${Date.now()}` },
  });
  const { slug } = await created.json();

  const pageA = await openEditor(owner, pond.slug, slug);
  const pageB = await openEditor(admin, pond.slug, slug);

  // Both participants appear in each presence strip.
  await expect(pageA.locator('.presence-avatar')).toHaveCount(2, { timeout: 10000 });
  await expect(pageB.locator('.presence-avatar')).toHaveCount(2, { timeout: 10000 });

  // The owner's cursor shows up as a named caret in the admin's editor.
  await pageA.locator('.ProseMirror').click();
  await pageA.keyboard.type('cursor is here');
  await expect(pageB.locator('.collab-caret__label')).toHaveText(ownerMe.displayName, {
    timeout: 10000,
  });

  // Disconnecting the owner drops them from the admin's presence strip.
  await owner.close();
  await expect(pageB.locator('.presence-avatar')).toHaveCount(1, { timeout: 15000 });

  await admin.close();
});

// Read-only participants (live changes visible, typing blocked) and the live
// read-write→read-only downgrade need real grants, so they live in the
// `collab-permissions` pack (issue #53) alongside the grant setup they require.

test('a public-API content replacement converges an open editor (#104)', async ({ browser }) => {
  const owner = await contextForUser(browser, BASE_URL, 'fixture-user');
  const admin = await contextForUser(browser, BASE_URL, 'fixture-admin');
  const pond = await personalPond(owner);
  const created = await owner.request.post(`/api/v1/ponds/${pond.id}/pages`, {
    data: { title: `API Replace ${Date.now()}` },
  });
  const { slug } = await created.json();

  // Expose the surface: instance switch (Site Admin) + pond opt-in (owner),
  // then mint a write token for the owner.
  await admin.request.patch('/api/v1/admin/settings', { data: { 'api.enabled': true } });
  await owner.request.patch(`/api/v1/ponds/${pond.id}`, { data: { apiEnabled: true } });
  const minted = await owner.request.post('/api/v1/users/me/api-tokens', {
    data: { name: `collab-e2e-${Date.now()}`, scope: 'write' },
  });
  const { token } = await minted.json();

  const pageA = await openEditor(owner, pond.slug, slug);
  const editorA = pageA.locator('.ProseMirror');
  await editorA.click();
  await pageA.keyboard.type('typed live before the API replace');
  await expect(editorA).toContainText('typed live before the API replace');

  // Replace the whole content through the public API: the change travels
  // over the collab-owned restore path, so the open editor converges.
  const replaced = await owner.request.patch(`/api/public/v1/ponds/${pond.slug}/pages/${slug}`, {
    headers: { Authorization: `Bearer ${token}` },
    data: { markdown: 'Replaced through the public API.' },
  });
  expect(replaced.ok()).toBeTruthy();
  await expect(editorA).toContainText('Replaced through the public API.', { timeout: 15000 });
  await expect(editorA).not.toContainText('typed live before the API replace');

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