import AxeBuilder from '@axe-core/playwright';
import { expect, test, type Page } from '@playwright/test';

import { contextForUser } from './helpers';

/**
 * A11y-Smoke-Pack (issue #171): axe-core-Scan der Kern-Oberflächen gegen
 * WCAG 2.1 A/AA. Regressionsschutz für das Audit vom 21.07.2026 (Bericht im
 * Workspace, Befunde A11Y-001…024) — die Screens hier waren nach den Fixes
 * der Issues #162–#170 verletzungsfrei; jede neue Verletzung bricht den
 * Build. Best-Practice-Regeln (axe-Tag best-practice) prüfen wir hier
 * bewusst NICHT, nur normative WCAG-Kriterien.
 *
 * Seit issue #180 läuft jeder Scan in BEIDEN Farbschemata: emulateMedia
 * setzt prefers-color-scheme, theme-init.js löst den Default „System“ zum
 * konkreten data-theme auf, axe misst dann die echten Dark-Token-Farben.
 */

const BASE = process.env.E2E_BASE_URL ?? 'http://localhost:5173';
const TAGS = ['wcag2a', 'wcag21a', 'wcag2aa', 'wcag21aa'];
const SCHEMES = ['light', 'dark'] as const;

/** Bewusst tolerierte Regel-IDs — nur mit Begründung ergänzen. */
const ALLOWED_RULES: string[] = [];

async function expectClean(page: Page, label: string): Promise<void> {
  const results = await new AxeBuilder({ page }).withTags(TAGS).analyze();
  const violations = results.violations.filter((v) => !ALLOWED_RULES.includes(v.id));
  expect(
    violations.map((v) => ({
      rule: v.id,
      impact: v.impact,
      help: v.help,
      nodes: v.nodes.slice(0, 5).map((n) => n.target),
    })),
    `axe-Verletzungen auf ${label}`,
  ).toEqual([]);
}

for (const scheme of SCHEMES) {
  test.describe(`${scheme} scheme`, () => {
    test(`login page passes the axe WCAG A/AA scan (${scheme})`, async ({ page }) => {
      await page.emulateMedia({ colorScheme: scheme });
      await page.goto('/login');
      await page.waitForLoadState('networkidle');
      await expectClean(page, `/login (${scheme})`);
    });

    test(`reading and editing a page passes the axe WCAG A/AA scan (${scheme})`, async ({
      browser,
    }) => {
      const context = await contextForUser(browser, BASE, 'fixture-user');
      const page = await context.newPage();
      await page.emulateMedia({ colorScheme: scheme });
      await page.goto('/p/content-fixtures/every-element');
      await page.waitForLoadState('networkidle');
      await expectClean(page, `Lesemodus every-element (${scheme})`);

      await page.locator('.editor-page__mode-toggle').click();
      await page.locator('.ProseMirror[contenteditable="true"]').waitFor({ timeout: 10_000 });
      await page.waitForTimeout(500);
      await expectClean(page, `Editor every-element (${scheme})`);
      await context.close();
    });

    test(`user settings pass the axe WCAG A/AA scan (${scheme})`, async ({ browser }) => {
      const context = await contextForUser(browser, BASE, 'fixture-user');
      const page = await context.newPage();
      await page.emulateMedia({ colorScheme: scheme });
      await page.goto('/settings');
      await page.waitForLoadState('networkidle');
      await expectClean(page, `/settings (${scheme})`);
      await context.close();
    });

    test(`admin area passes the axe WCAG A/AA scan (${scheme})`, async ({ browser }) => {
      const context = await contextForUser(browser, BASE, 'fixture-admin');
      const page = await context.newPage();
      await page.emulateMedia({ colorScheme: scheme });
      await page.goto('/admin');
      await page.waitForLoadState('networkidle');
      // Personenliste sichtbar, inkl. der Icon-Aktionen (issue #175).
      await page.locator('.user-manager__table .user-row').first().waitFor();
      await expectClean(page, `/admin (${scheme})`);
      await context.close();
    });
  });
}