import { readdirSync, readFileSync, statSync } from 'node:fs';
import { dirname, join, relative } from 'node:path';
import { fileURLToPath } from 'node:url';

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

import { contextForUser } from './helpers';

/**
 * Obsidian vault import pack (issues #117/#118): a pond admin imports the
 * checked-in fixture vault through the settings dialog and the result shows
 * up in the app — folder tree, rewritten wikilinks, tag labels, embedded
 * image. A plain editor sees no such section. The ZIP is built from the
 * fixture directory here, so the vault stays reviewable as plain files.
 */
const BASE_URL = process.env.E2E_BASE_URL ?? 'http://localhost:5173';
const FIXTURE_DIR = join(
  dirname(fileURLToPath(import.meta.url)),
  '../../../fixtures/import/obsidian-vault',
);

function fixtureZip(): Buffer {
  const entries: Record<string, Uint8Array> = {};
  const walk = (dir: string): void => {
    for (const name of readdirSync(dir)) {
      const path = join(dir, name);
      if (statSync(path).isDirectory()) walk(path);
      else entries[relative(FIXTURE_DIR, path)] = new Uint8Array(readFileSync(path));
    }
  };
  walk(FIXTURE_DIR);
  return Buffer.from(zipSync(entries));
}

async function json<T>(context: BrowserContext, url: string, data: unknown): Promise<T> {
  const response = await context.request.post(url, { data });
  if (!response.ok()) throw new Error(`post ${url} → ${response.status()}`);
  return response.json() as Promise<T>;
}

test('a pond admin imports an Obsidian vault through the settings dialog', async ({ browser }) => {
  const context = await contextForUser(browser, BASE_URL, 'fixture-user');
  const ts = Date.now();
  const pond = await json<{ id: string; slug: string }>(context, '/api/v1/ponds', {
    name: `Vault Pond ${ts}`,
  });
  await json<{ id: string; slug: string; title: string }>(
    context,
    `/api/v1/ponds/${pond.id}/pages`,
    { title: `Vault Mount ${ts}` },
  );
  const label = await json<{ id: string; name: string }>(
    context,
    `/api/v1/ponds/${pond.id}/labels`,
    { name: `import-${ts}` },
  );

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

  // The admin-only section opens the dialog.
  await page.locator('.vault-import__open').click();
  const dialog = page.locator('.vault-import-dialog');
  await expect(dialog).toBeVisible();
  // #120: the panel must be opaque — --color-surface was undefined and the
  // whole .modal background silently dropped, letting the page bleed through.
  await expect(dialog).toHaveCSS('background-color', 'rgb(255, 255, 255)');

  await dialog.locator('input[type="file"]').setInputFiles({
    name: 'vault.zip',
    mimeType: 'application/zip',
    buffer: fixtureZip(),
  });
  // Mount under the prepared page and tag everything with the extra label.
  await dialog
    .locator('li', { hasText: `Vault Mount ${ts}` })
    .locator('input')
    .check();
  await dialog
    .locator('li', { hasText: `import-${ts}` })
    .locator('input')
    .check();
  await dialog.locator('.vault-import-dialog__start').click();

  // The job runs; the dialog offers the way into the imported pages.
  const doneLink = dialog.getByRole('link');
  await expect(doneLink).toBeVisible({ timeout: 30_000 });
  await doneLink.click();

  // The sidebar shows the vault's folder structure under the mount page.
  const mountItem = page
    .locator('.sidebar__page-item')
    .filter({ has: page.locator(`.sidebar__page:text-is("Vault Mount ${ts}")`) })
    .first();
  await expect(
    mountItem.locator('.sidebar__tree-children .sidebar__page', { hasText: 'Projekte' }),
  ).toBeVisible();
  await expect(page.locator('.sidebar__page:text-is("Startseite")')).toBeVisible();

  // A rewritten Obsidian link navigates to the right imported page, and the
  // display text still reads like the original note name.
  await page.goto(`/p/${pond.slug}/startseite`);
  await page.locator('.editor-content a.wikilink', { hasText: 'Projekt A' }).click();
  await expect(page).toHaveURL(new RegExp(`/p/${pond.slug}/projekt-a$`));

  // The note's image came in as a pond file, and its tags became labels
  // (nested #status/aktiv included) next to the dialog's extra label.
  await expect(page.locator('.editor-content img').first()).toBeVisible();
  const labels = await context.request.get(`/api/v1/ponds/${pond.id}/labels`);
  const tree = JSON.stringify(await labels.json());
  expect(tree).toContain('status');
  expect(tree).toContain('aktiv');
  expect(tree).toContain(label.name);

  await context.close();
});

test('a plain editor gets no vault-import section', async ({ browser }) => {
  const owner = await contextForUser(browser, BASE_URL, 'fixture-user');
  const editor = await contextForUser(browser, BASE_URL, 'fixture-editor');
  const ts = Date.now();
  const pond = await json<{ id: string; slug: string }>(owner, '/api/v1/ponds', {
    name: `Vault Gate ${ts}`,
  });
  await json(owner, `/api/v1/ponds/${pond.id}/members`, {
    usernameOrEmail: 'fixture-editor',
    role: 'editor',
  });

  const page = await editor.newPage();
  await page.goto(`/p/${pond.slug}/settings`);
  await expect(page.locator('.pond-settings-page')).toBeVisible();
  await expect(page.locator('.vault-import__open')).toHaveCount(0);

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