// tests/e2e/voyage-playground-a11y.spec.mjs
// v4.3 Group D e2e a11y + pixel-diff + SC24 XSS guard specs.
//
// Tests:
//   1. Light-theme axe-core scan — zero critical/serious violations (absolute)
//   2. Dark-theme  axe-core scan — zero critical/serious violations (absolute)
//   3. SC1.6 inline gallery — data:image PNG rendered via scheduleRender hook
//   4. Pixel-diff smoke (1280×900) against baseline PNGs in
//      tests/e2e/snapshots/. Threshold maxDiffPixelRatio: 0.02.
//   5. SC24-security — script injection in artifact body does not execute
//
// SC2 authoritative verification (axe-core). v4.3 Sesjon 17 (Wave 3 Step 5)
// converted the SC2 assertion from delta-baseline to absolute zero-violation
// after Wave 2 remediation (Step 4 color-contrast fix + Step 3 sidebar
// toggle restructure) reduced the critical/serious count to zero.

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

test.describe('voyage-playground a11y (axe-core)', () => {
  test('light theme — zero critical/serious violations (absolute)', async ({ page }) => {
    await page.goto('voyage-playground.html');
    await page.evaluate(() => {
      window.localStorage.setItem('voyage-theme', 'light');
      document.documentElement.setAttribute('data-theme', 'light');
      document.documentElement.style.colorScheme = 'light';
    });
    await page.reload();
    await page.waitForLoadState('domcontentloaded');
    const results = await new AxeBuilder({ page })
      .withTags(['wcag2a', 'wcag2aa', 'wcag21a', 'wcag21aa'])
      .analyze();
    const violations = results.violations.filter(v => ['critical','serious'].includes(v.impact));
    expect(
      violations,
      JSON.stringify(violations.map(v => ({ id: v.id, impact: v.impact, nodes: v.nodes.length })), null, 2),
    ).toEqual([]);
  });

  test('dark theme — zero critical/serious violations (absolute)', async ({ page }) => {
    await page.goto('voyage-playground.html');
    await page.evaluate(() => {
      window.localStorage.setItem('voyage-theme', 'dark');
      document.documentElement.setAttribute('data-theme', 'dark');
      document.documentElement.style.colorScheme = 'dark';
    });
    await page.reload();
    await page.waitForLoadState('domcontentloaded');
    const results = await new AxeBuilder({ page })
      .withTags(['wcag2a', 'wcag2aa', 'wcag21a', 'wcag21aa'])
      .analyze();
    const violations = results.violations.filter(v => ['critical','serious'].includes(v.impact));
    expect(
      violations,
      JSON.stringify(violations.map(v => ({ id: v.id, impact: v.impact, nodes: v.nodes.length })), null, 2),
    ).toEqual([]);
  });

  // v4.3 Step 8 — inline screenshot gallery (finding 31d28f65).
  // Injects a pre-built artifacts object with screenshots[] via the
  // window.__voyage.scheduleRender hook (avoids webkitdirectory which
  // is not programmatically triggerable). Asserts the dashboard renders
  // at least one data:image PNG <img> tag.
  test('SC1.6 inline gallery — data:image PNGs rendered (31d28f65)', async ({ page }) => {
    await page.goto('voyage-playground.html');
    await page.waitForLoadState('domcontentloaded');
    // 1×1 transparent PNG (same base64 as the fixture file)
    const SAMPLE_DATA_URL =
      'data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAADUlEQVR42mP8/5+hHgAHggJ/PchI7wAAAABJRU5ErkJggg==';
    await page.evaluate((dataUrl) => {
      window.__voyage.scheduleRender({
        artifacts: {
          basePath: 'fixture-project',
          storageKey: 'voyage_proj_fixture',
          brief: { path: 'brief.md', content: '# Fixture', frontmatter: {} },
          plan: null,
          review: null,
          progress: null,
          research: [],
          architecture: { overview: null, gaps: null, looseFiles: [] },
          screenshots: [{ path: 'docs/screenshots/dashboard/sample.png', dataUrl: dataUrl }],
          looseFiles: [],
        },
      });
    }, SAMPLE_DATA_URL);
    // The gallery is rendered inside #voyage-dashboard
    const imgCount = await page.locator('#voyage-dashboard img[src^="data:image/png"]').count();
    expect(imgCount, 'expected at least one data:image/png <img> in the gallery').toBeGreaterThan(0);
  });

  test('pixel-diff smoke 1280×900 — light + dark within 2% threshold (SC1 backup)', async ({ page }) => {
    await page.setViewportSize({ width: 1280, height: 900 });
    // Light theme baseline
    await page.goto('voyage-playground.html');
    await page.evaluate(() => {
      window.localStorage.setItem('voyage-theme', 'light');
      document.documentElement.setAttribute('data-theme', 'light');
      document.documentElement.style.colorScheme = 'light';
    });
    await page.reload();
    await page.waitForLoadState('domcontentloaded');
    await expect(page).toHaveScreenshot('voyage-playground-light.png', {
      maxDiffPixelRatio: 0.02,
      fullPage: false,
    });

    // Dark theme baseline
    await page.evaluate(() => {
      window.localStorage.setItem('voyage-theme', 'dark');
      document.documentElement.setAttribute('data-theme', 'dark');
      document.documentElement.style.colorScheme = 'dark';
    });
    await page.reload();
    await page.waitForLoadState('domcontentloaded');
    await expect(page).toHaveScreenshot('voyage-playground-dark.png', {
      maxDiffPixelRatio: 0.02,
      fullPage: false,
    });
  });

  // v4.3 Step 2 — Group D Playwright XSS injection runtime guard
  // (finding 1d3591d4). Behavioral counterpart to the DOMPurify fix in
  // renderArtifact (Step 1). Injects a <script>alert(1)</script> markdown
  // payload via scheduleRender and verifies neither a JS dialog fires nor
  // a <script> tag survives in #voyage-viewport. Defense in depth alongside
  // the Group A static-grep guard.
  test('SC24-security — script injection in artifact body does not execute (1d3591d4)', async ({ page }) => {
    let dialogCount = 0;
    page.on('dialog', (d) => {
      dialogCount++;
      d.dismiss();
    });
    await page.goto('voyage-playground.html');
    await page.waitForLoadState('domcontentloaded');
    await page.evaluate(() => {
      window.__voyage.scheduleRender({
        markdown: '<script>alert(1)</script>\n# title',
      });
    });
    expect(dialogCount, `expected zero dialogs but got ${dialogCount}`).toBe(0);
    expect(await page.locator('#voyage-viewport script').count()).toBe(0);
  });
});