/**
 * 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);
  });

  // (A vacuous `/join` probe that only asserted `Array.isArray(...)` — always true —
  // was removed; the real sheet-level env() check is the structural test below.)

  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);
  });
});
