import { expect, test } from '../helpers/serve-dist';

const navHrefs = [
  '#start',
  '#profile',
  '#experience',
  '#infrastructure',
  '#selected-builds',
  '#additional-work',
  '#toolkit',
  '#contact',
] as const;

const assertVisibleUnobscuredFocus = async (
  page: import('@playwright/test').Page,
): Promise<void> => {
  await expect
    .poll(() =>
      page.evaluate(() => {
        const active = document.activeElement;
        if (!(active instanceof HTMLElement)) return false;
        const rect = active.getBoundingClientRect();
        const left = Math.max(0, rect.left);
        const right = Math.min(window.innerWidth, rect.right);
        const top = Math.max(0, rect.top);
        const bottom = Math.min(window.innerHeight, rect.bottom);
        if (right <= left || bottom <= top) return false;
        const x = left + (right - left) / 2;
        const y = top + (bottom - top) / 2;
        const topElement = document.elementFromPoint(x, y);
        const style = getComputedStyle(active);
        return (
          topElement !== null &&
          (active === topElement ||
            active.contains(topElement) ||
            topElement.contains(active)) &&
          style.outlineStyle !== 'none' &&
          Number.parseFloat(style.outlineWidth) >= 2
        );
      }),
    )
    .toBe(true);
};

test('tabs from the skip link through navigation and every contact action', async ({
  page,
  distUrl,
}) => {
  await page.goto(distUrl, { waitUntil: 'domcontentloaded' });

  const expectedTargets = [
    { selector: '.skip-link', href: '#portfolio-content' },
    ...navHrefs.map((href) => ({ selector: `nav a[href="${href}"]`, href })),
    {
      selector: '#contact a[href^="mailto:"]',
      href: 'mailto:luca.pislaru@gmail.com',
    },
    {
      selector: '#contact a[href="https://github.com/LucaPisl"]',
      href: 'https://github.com/LucaPisl',
    },
    {
      selector: '#contact a[href="https://gitlab.com/luca_pisl"]',
      href: 'https://gitlab.com/luca_pisl',
    },
    {
      selector: '#contact a[href="https://linkedin.com/in/luca-pisl"]',
      href: 'https://linkedin.com/in/luca-pisl',
    },
  ];

  for (const target of expectedTargets) {
    await page.keyboard.press('Tab');
    const locator = page.locator(target.selector);
    await expect(locator).toBeFocused();
    await expect(locator).toHaveAttribute('href', target.href);
    await assertVisibleUnobscuredFocus(page);
  }
});

test('explicit section activation scrolls to and focuses its heading', async ({
  page,
  distUrl,
}, testInfo) => {
  test.skip(
    testInfo.project.name === 'mobile-chromium',
    'The full keyboard path already covers the mobile project.',
  );
  await page.goto(distUrl, { waitUntil: 'domcontentloaded' });

  for (let index = 0; index < 5; index += 1) await page.keyboard.press('Tab');
  await expect(page.locator('nav a[href="#infrastructure"]')).toBeFocused();
  await page.keyboard.press('Enter');

  await expect(page).toHaveURL(`${distUrl}/#infrastructure`);
  await expect(page.locator('#infrastructure')).toBeInViewport();
  await expect(page.locator('#infrastructure-heading')).toHaveAttribute(
    'tabindex',
    '-1',
  );
  await expect(page.locator('#infrastructure-heading')).toBeFocused();
  await assertVisibleUnobscuredFocus(page);
});

test('manual wheel and PageDown scrolling never move focus', async ({
  page,
  distUrl,
}, testInfo) => {
  test.skip(
    testInfo.project.name === 'mobile-chromium',
    'The focus invariant is engine-level rather than viewport-specific.',
  );
  await page.goto(distUrl, { waitUntil: 'domcontentloaded' });
  await page.keyboard.press('Tab');
  await page.keyboard.press('Tab');
  const startLink = page.locator('nav a[href="#start"]');
  await expect(startLink).toBeFocused();

  await page.mouse.wheel(0, 900);
  await expect(startLink).toBeFocused();
  await page.keyboard.press('PageDown');
  await expect(startLink).toBeFocused();
});

test('direct fragments do not steal focus while reduced-motion navigation remains accessible', async ({
  page,
  distUrl,
}, testInfo) => {
  test.skip(
    testInfo.project.name === 'mobile-chromium',
    'The full keyboard path already covers the mobile project.',
  );
  await page.emulateMedia({ reducedMotion: 'reduce' });
  await page.goto(`${distUrl}/#toolkit`, { waitUntil: 'domcontentloaded' });
  await expect(page.locator('#toolkit-heading')).not.toBeFocused();

  await page.locator('nav a[href="#contact"]').click();
  await expect(page).toHaveURL(`${distUrl}/#contact`);
  await expect(page.locator('#contact-heading')).toBeFocused();
  await expect(page.locator('#contact')).toBeInViewport();
});