import { test, expect } from '@chromatic-com/playwright';
import { loginViaAPI,
  CONFIG,
  navigateTo,
  assertNotBroken,
  SELECTORS,
} from './helpers';

// =============================================================================
// Helper: assert no horizontal scroll on the current page
// =============================================================================

async function assertNoHorizontalScroll(page: import('@playwright/test').Page): Promise<void> {
  const hasHScroll = await page.evaluate(() => {
    return document.documentElement.scrollWidth > document.documentElement.clientWidth;
  });
  expect(hasHScroll).toBe(false);
}

// =============================================================================
// RESPONSIVE — Mobile 375x667
// =============================================================================

test.describe('RESPONSIVE — Mobile 375x667 @mobile @feature-responsive', () => {
  test.use({ viewport: { width: 375, height: 667 } });

  test.beforeEach(async ({ page }) => {
    await loginViaAPI(page, CONFIG.users.listener.email, CONFIG.users.listener.password);
  });

  test('Dashboard — pas de scroll horizontal', async ({ page }) => {
    await navigateTo(page, '/dashboard');
    await assertNotBroken(page);
    await assertNoHorizontalScroll(page);
  });

  test('Dashboard — sidebar est cachee par defaut', async ({ page }) => {
    await navigateTo(page, '/dashboard');

    const sidebar = page.locator(SELECTORS.sidebar);

    // On mobile, the sidebar has -translate-x-full (Tailwind) which moves it off-screen.
    // Playwright's isVisible() may still return true because the element has dimensions.
    // We check the computed transform or Tailwind classes to confirm it's hidden.
    const sidebarState = await sidebar.evaluate((el) => {
      const style = window.getComputedStyle(el);
      const rect = el.getBoundingClientRect();
      return {
        className: el.className,
        transform: style.transform,
        visibility: style.visibility,
        display: style.display,
        x: rect.x,
        width: rect.width,
        rightEdge: rect.x + rect.width,
      };
    }).catch(() => null);

    // If sidebar element doesn't exist or has no bounding box, it's effectively hidden — acceptable
    if (!sidebarState) {
      expect(sidebarState).toBeNull();
      return;
    }

    const isOffScreen = sidebarState.rightEdge <= 0 || sidebarState.x < -50;
    const isCollapsed = sidebarState.width <= 64;
    const hasHiddenTransform = sidebarState.transform.includes('matrix') && sidebarState.x < -50;
    const hasHiddenClass = /(-translate-x-full|hidden|invisible)/.test(sidebarState.className);
    const isNotDisplayed = sidebarState.display === 'none' || sidebarState.visibility === 'hidden';

    expect(isOffScreen || isCollapsed || hasHiddenTransform || hasHiddenClass || isNotDisplayed).toBeTruthy();
  });

  test('Dashboard — menu hamburger ouvre la sidebar en overlay', async ({ page }) => {
    await navigateTo(page, '/dashboard');
    // Wait for the header to be fully rendered
    await page.locator('[data-testid="app-header"]').waitFor({ state: 'visible', timeout: 10_000 }).catch(() => {});
    await page.waitForTimeout(500);

    // The hamburger button in Header.tsx is the first <button> inside the header
    // with class "lg:hidden" — visible only on mobile. It has a Menu SVG icon.
    // Strategy 1: look for the button inside the header that's the hamburger
    let hamburger = page.locator('[data-testid="app-header"] button').first();
    let hamburgerVisible = await hamburger.isVisible({ timeout: 8_000 }).catch(() => false);

    // The first button in the header on mobile should be the hamburger (Menu icon)
    if (!hamburgerVisible) {
      // Strategy 2: find by class pattern
      hamburger = page.locator('header button').first();
      hamburgerVisible = await hamburger.isVisible({ timeout: 3_000 }).catch(() => false);
    }

    // Strategy 3: aria-label fallback
    if (!hamburgerVisible) {
      hamburger = page.locator('button[aria-label*="menu" i], button[aria-label*="sidebar" i]').first();
      hamburgerVisible = await hamburger.isVisible().catch(() => false);
    }

    if (!hamburgerVisible) {
      test.skip(!hamburgerVisible, 'No hamburger button found on mobile — sidebar may use alternative pattern');
      return;
    }

    await hamburger.click({ force: true });
    await page.waitForTimeout(CONFIG.timeouts.animation);

    // After click, sidebar should become visible and on-screen
    const sidebar = page.locator(SELECTORS.sidebar);
    const sidebarState = await sidebar.evaluate((el) => {
      const rect = el.getBoundingClientRect();
      return { x: rect.x, width: rect.width, className: el.className };
    }).catch(() => null);

    expect(sidebarState).not.toBeNull();

    if (sidebarState) {
      // Sidebar should now be on-screen (translate-x-0) with proper width
      const isOnScreen = sidebarState.x >= -5 && sidebarState.width > 100;
      const hasOpenClass = /translate-x-0/.test(sidebarState.className) || !/-translate-x-full/.test(sidebarState.className);
      expect(isOnScreen || hasOpenClass).toBeTruthy();
    }
  });

  test('Discover — grille de genres s\'adapte en colonnes', async ({ page }) => {
    await navigateTo(page, '/discover');
    await assertNotBroken(page);
    await assertNoHorizontalScroll(page);

    // Check that any grid container fits within viewport width
    const gridsOverflow = await page.evaluate(() => {
      const vw = document.documentElement.clientWidth;
      const grids = document.querySelectorAll('[class*="grid"], [class*="Grid"]');
      for (const grid of grids) {
        const rect = grid.getBoundingClientRect();
        if (rect.width > vw + 2) return true; // 2px tolerance
      }
      return false;
    });
    expect(gridsOverflow).toBe(false);
  });

  test('Player bar — controles essentiels visibles (play, progress)', async ({ page }) => {
    await navigateTo(page, '/discover');

    // The player bar should be at the bottom if a track is playing
    // Even without a track, verify the player area does not overflow
    const player = page.locator(SELECTORS.playerBar);
    const playerVisible = await player.isVisible().catch(() => false);

    if (!playerVisible) {
      // No track playing is normal — player bar won't be visible, skip this test
      test.skip(!playerVisible, 'Player bar not visible — no track playing');
      return;
    }

    const box = await player.boundingBox();
    expect(box).not.toBeNull();

    if (box) {
      // Player bar should fit within viewport width
      expect(box.width).toBeLessThanOrEqual(375 + 2);

      // Look for play/pause button inside the player
      const playBtn = player.getByTestId('play-button').or(player.getByRole('button', { name: /play|pause|lire/i }).first());
      const playVisible = await playBtn.isVisible().catch(() => false);
      expect(playVisible).toBeTruthy();
    }
  });

  test('Search — le champ de recherche est accessible', async ({ page }) => {
    await navigateTo(page, '/search');
    await assertNotBroken(page);
    await assertNoHorizontalScroll(page);

    // On search page, the search input should be visible
    const searchInput = page.locator(SELECTORS.searchInput)
      .or(page.getByPlaceholder(/search|rechercher/i))
      .or(page.locator('input[type="search"]'));

    const searchVisible = await searchInput.first().isVisible().catch(() => false);

    if (!searchVisible) {
      // On mobile, search might be in the header behind a toggle
      const searchToggle = page.locator('header button[aria-label*="search" i]')
        .or(page.locator('header button[aria-label*="Search" i]'));
      const toggleVisible = await searchToggle.first().isVisible().catch(() => false);

      if (toggleVisible) {
        await searchToggle.first().click();
        await page.waitForTimeout(CONFIG.timeouts.animation);
      }
    }

    // After possible toggle, search should be accessible on the search page
    const body = await page.textContent('body') || '';
    expect(body.length).toBeGreaterThan(50);
  });

  test('Settings — les onglets sont scrollables ou en dropdown', async ({ page }) => {
    await navigateTo(page, '/settings');
    await assertNotBroken(page);
    await assertNoHorizontalScroll(page);

    // Settings tabs/nav should not overflow the viewport
    const tabsOverflow = await page.evaluate(() => {
      const vw = document.documentElement.clientWidth;
      const navs = document.querySelectorAll('nav, [role="tablist"]');
      for (const nav of navs) {
        const rect = nav.getBoundingClientRect();
        if (rect.width > vw + 2) return true;
      }
      return false;
    });
    // Tabs may be scrollable (overflow-x: auto) which is acceptable
    // The key test is that the page itself has no h-scroll (already asserted above)
    // But individual tab navs should also not overflow the viewport
    expect(tabsOverflow).toBe(false);
  });

  test('Track detail — layout en colonne (cover au-dessus, infos en-dessous)', async ({ page }) => {
    // Navigate to discover to find a track link
    await navigateTo(page, '/discover');
    await assertNotBroken(page);

    // Try to navigate to a track detail page
    const trackLink = page.locator('a[href*="/track"]').first();
    const hasTrackLink = await trackLink.isVisible().catch(() => false);

    if (hasTrackLink) {
      await trackLink.click();
      await page.waitForLoadState('networkidle').catch(() => {});
    } else {
      // Fallback: go to a track page directly
      await navigateTo(page, '/tracks');
    }

    await assertNoHorizontalScroll(page);

    // On mobile, elements should stack vertically — images and text blocks
    // should each be close to full viewport width
    const body = await page.textContent('body') || '';
    expect(body.length).toBeGreaterThan(50);
  });

  test('Login — formulaire centre, pas de debordement', async ({ page }) => {
    // Logout first by going directly to login
    await page.goto('/login', { waitUntil: 'domcontentloaded' });
    await page.waitForLoadState('networkidle').catch(() => {});
    await assertNoHorizontalScroll(page);

    // Form should be visible and not wider than the viewport
    const form = page.locator('form').first();
    const formVisible = await form.isVisible().catch(() => false);
    expect(formVisible).toBe(true);

    const box = await form.boundingBox();
    expect(box).not.toBeNull();

    if (box) {
      expect(box.width).toBeLessThanOrEqual(375);
      // Form should be roughly centered (left margin > 0 if form is narrower than viewport)
      if (box.width < 375) {
        expect(box.x).toBeGreaterThan(0);
      }
    }
  });

  test('Register — formulaire centre, pas de debordement', async ({ page }) => {
    await page.goto('/register', { waitUntil: 'domcontentloaded' });
    await page.waitForLoadState('networkidle').catch(() => {});
    await assertNoHorizontalScroll(page);

    const form = page.locator('form').first();
    const formVisible = await form.isVisible().catch(() => false);
    expect(formVisible).toBe(true);

    const box = await form.boundingBox();
    expect(box).not.toBeNull();

    if (box) {
      expect(box.width).toBeLessThanOrEqual(375);
      if (box.width < 375) {
        expect(box.x).toBeGreaterThan(0);
      }
    }
  });
});

// =============================================================================
// RESPONSIVE — Tablette 768x1024
// =============================================================================

test.describe('RESPONSIVE — Tablette 768x1024 @mobile @feature-responsive', () => {
  test.use({ viewport: { width: 768, height: 1024 } });

  test.beforeEach(async ({ page }) => {
    await loginViaAPI(page, CONFIG.users.listener.email, CONFIG.users.listener.password);
  });

  test('Dashboard — layout adapte, sidebar visible ou toggle', async ({ page }) => {
    await navigateTo(page, '/dashboard');
    await assertNotBroken(page);
    await assertNoHorizontalScroll(page);

    const sidebar = page.locator(SELECTORS.sidebar);
    const sidebarVisible = await sidebar.isVisible().catch(() => false);

    if (sidebarVisible) {
      const box = await sidebar.boundingBox();
      expect(box).not.toBeNull();
      if (box) {
        // On tablet, sidebar could be collapsed (64px) or expanded (240px)
        expect(box.width).toBeGreaterThan(0);
        expect(box.width).toBeLessThanOrEqual(240 + 10); // 240px max + tolerance
      }
    } else {
      // Sidebar hidden, should have a toggle available
      const hamburger = page.locator('header button[aria-label*="menu" i]')
        .or(page.locator('header button[aria-label*="Menu" i]'))
        .or(page.locator('header button[aria-label*="sidebar" i]'));
      const toggleExists = await hamburger.first().isVisible().catch(() => false);
      expect(toggleExists).toBe(true);
    }
  });

  test('Discover — grille 2-3 colonnes', async ({ page }) => {
    await navigateTo(page, '/discover');
    await assertNotBroken(page);
    await assertNoHorizontalScroll(page);

    // Check that grid items are arranged in 2-3 columns
    // by checking that at least 2 items share the same Y position
    const columnCount = await page.evaluate(() => {
      const cards = document.querySelectorAll('[class*="grid"] > *');
      if (cards.length < 2) return 1;

      const yPositions: Record<number, number> = {};
      for (const card of cards) {
        const rect = card.getBoundingClientRect();
        // Round Y to group items on the same row
        const y = Math.round(rect.top / 10) * 10;
        yPositions[y] = (yPositions[y] || 0) + 1;
      }

      // Return the max number of items on a single row
      return Math.max(...Object.values(yPositions), 1);
    });

    // On a 768px tablet, we expect 1-4 columns for grid content
    expect(columnCount).toBeGreaterThanOrEqual(1);
    expect(columnCount).toBeLessThanOrEqual(4);
  });

  test('Marketplace — produits en grille adaptee', async ({ page }) => {
    await navigateTo(page, '/marketplace');
    await assertNotBroken(page);
    await assertNoHorizontalScroll(page);

    // Verify product cards fit within the viewport
    const cardsOverflow = await page.evaluate(() => {
      const vw = document.documentElement.clientWidth;
      const cards = document.querySelectorAll('[class*="card" i], [class*="Card" i], [role="article"]');
      for (const card of cards) {
        const rect = card.getBoundingClientRect();
        if (rect.right > vw + 2) return true;
      }
      return false;
    });
    expect(cardsOverflow).toBe(false);
  });

  test('Playlists — cards en grille', async ({ page }) => {
    await navigateTo(page, '/playlists');
    await assertNotBroken(page);
    await assertNoHorizontalScroll(page);

    // Verify playlist cards do not overflow
    const cardsOverflow = await page.evaluate(() => {
      const vw = document.documentElement.clientWidth;
      const cards = document.querySelectorAll('[class*="card" i], [class*="Card" i], [role="article"]');
      for (const card of cards) {
        const rect = card.getBoundingClientRect();
        if (rect.right > vw + 2) return true;
      }
      return false;
    });
    expect(cardsOverflow).toBe(false);
  });
});