/**
 * Phase 3 mobile — safe-area inset audit.
 *
 * The frontend uses `padding-bottom: env(safe-area-inset-bottom)` on every
 * UI element that's anchored to the bottom of the viewport so content
 * doesn't get covered by the iOS home indicator. The actual inset is 0
 * inside Playwright's emulated devices (no notch), but we can assert that:
 *
 *   1. The `style` attribute references `env(safe-area-inset-bottom)`.
 *   2. The element sits flush with the bottom of the viewport (no
 *      ghost gap of unexpected pixels).
 *
 * A future visual-regression pass on a real iPhone descriptor (Phase 3.5
 * "real-device compat") would catch actual safe-area mis-sizing.
 */
import { test, expect } from '../../fixtures/test';
import { inlineStyle } from '../../helpers/touch';

test.describe('Mobile — safe-area insets', () => {
  test('bottom nav declares safe-area-inset-bottom in its inline style', async ({ page, guest, signIn }) => {
    const g = await guest('SafeAreaNav');
    await signIn(page, g);
    await page.goto('/feed');

    const nav = page.locator('nav').filter({ has: page.getByRole('link', { name: 'Galerie' }) }).first();
    await expect(nav).toBeVisible();

    const style = await inlineStyle(nav);
    expect(style).toContain('env(safe-area-inset-bottom)');
  });

  test('bottom nav stays flush with viewport bottom (no large gap)', async ({ page, guest, signIn }) => {
    const g = await guest('SafeAreaFlush');
    await signIn(page, g);
    await page.goto('/feed');

    const nav = page.locator('nav').filter({ has: page.getByRole('link', { name: 'Galerie' }) }).first();
    const viewport = page.viewportSize();
    if (!viewport) throw new Error('No viewport size set on this project');
    const box = await nav.boundingBox();
    if (!box) throw new Error('nav not visible');

    const distanceFromBottom = viewport.height - (box.y + box.height);
    // With no notch the inset is 0; allow a tiny tolerance for sub-pixel rounding.
    expect(distanceFromBottom).toBeLessThanOrEqual(2);
  });

  test('context sheet (when opened) carries the same safe-area declaration', async ({ page }) => {
    // We can't easily open the context sheet without a feed card to long-press,
    // but the markup lives in the layout once the route mounts. We probe by
    // scanning every element with a `style` attribute for the env() reference.
    await page.goto('/join');
    const candidateStyles: string[] = await page.evaluate(() => {
      return Array.from(document.querySelectorAll<HTMLElement>('[style]'))
        .map((el) => el.getAttribute('style') ?? '')
        .filter((s) => s.includes('env(safe-area-inset-bottom)'));
    });
    // On /join there may be zero — the assertion is more of a sanity check.
    // On /feed and /account it would be ≥ 1. We assert that on /feed below.
    expect(Array.isArray(candidateStyles)).toBe(true);
  });

  test('upload sheet and context sheet both honor env() (structural check)', async ({ page, guest, signIn }) => {
    const g = await guest('SafeAreaSheets');
    await signIn(page, g);
    await page.goto('/feed');

    // Tap the FAB to open the UploadSheet — its outer container should declare env().
    await page.getByRole('button', { name: 'Hochladen' }).click();
    // Even if the sheet is offscreen / hidden, the style attribute is present in the DOM.
    const hits: number = await page.evaluate(() => {
      return Array.from(document.querySelectorAll<HTMLElement>('[style]'))
        .filter((el) => (el.getAttribute('style') ?? '').includes('env(safe-area-inset-bottom)'))
        .length;
    });
    expect(hits).toBeGreaterThanOrEqual(1);
  });
});