/**
 * E2E Tests — Page Découverte musicale (/discover)
 *
 * Tests exhaustifs : chargement, fonctionnalités, sécurité, a11y, i18n, responsive, régression.
 */
import { test, expect } from '@playwright/test';
import { CONFIG, loginViaAPI, navigateTo } from './helpers';

// ---------------------------------------------------------------------------
// HELPERS
// ---------------------------------------------------------------------------

async function goToDiscover(page: import('@playwright/test').Page): Promise<void> {
  await loginViaAPI(page, 'user@veza.music', 'User123!');
  await navigateTo(page, '/discover');
}

// ---------------------------------------------------------------------------
// TESTS
// ---------------------------------------------------------------------------

test.describe('Découverte musicale (/discover)', () => {
  test.describe('Chargement & Rendu', () => {
    test('la page se charge sans erreur', async ({ page }) => {
      const errors: string[] = [];
      page.on('pageerror', (err) => errors.push(err.message));

      await goToDiscover(page);

      // Page loaded, not redirected
      expect(page.url()).toContain('/discover');

      // Title visible
      await expect(page.getByRole('heading', { level: 1 })).toBeVisible();

      // No critical JS errors (filter out audio playback errors)
      const criticalErrors = errors.filter(
        (e) => !e.includes('audio') && !e.includes('playback') && !e.includes('download'),
      );
      expect(criticalErrors).toHaveLength(0);
    });

    test('le titre "Discover" et le sous-titre sont visibles', async ({ page }) => {
      await goToDiscover(page);

      await expect(page.getByRole('heading', { name: /discover/i, level: 1 })).toBeVisible();
      // Subtitle
      const body = await page.textContent('body');
      expect(body).toMatch(/explore by genre|explorez par genre|explora por/i);
    });

    test('les genre cards sont affichées', async ({ page }) => {
      await goToDiscover(page);

      // At least some genre buttons should be visible
      const genreButtons = page.locator('button[aria-label*="Browse"]');
      const count = await genreButtons.count();
      expect(count).toBeGreaterThan(5);
    });

    test('la section Editorial Playlists est présente', async ({ page }) => {
      await goToDiscover(page);

      await expect(page.getByRole('heading', { name: /editorial playlist/i })).toBeVisible();
    });
  });

  test.describe('Fonctionnalités', () => {
    test('cliquer sur un genre navigue vers ?genre=slug', async ({ page }) => {
      await goToDiscover(page);

      // Click a genre button
      const genreBtn = page.locator('button[aria-label*="Browse"]').first();
      await genreBtn.click();
      await page.waitForTimeout(1_000);

      // URL should have ?genre= parameter
      expect(page.url()).toMatch(/\?genre=/);

      // Title should change to the genre name
      const h1 = page.getByRole('heading', { level: 1 });
      await expect(h1).toBeVisible();
      const title = await h1.textContent();
      expect(title).not.toBe('Discover');
    });

    test('le bouton Back ramène à la liste des genres', async ({ page }) => {
      await goToDiscover(page);

      // Click genre
      await page.locator('button[aria-label*="Browse"]').first().click();
      await page.waitForTimeout(1_000);
      expect(page.url()).toMatch(/\?genre=/);

      // Click Back
      await page.getByRole('button', { name: /back|retour|volver/i }).click();
      await page.waitForTimeout(1_000);

      // Should be back on /discover without query params
      expect(page.url()).toBe(`${CONFIG.baseURL}/discover`);
      await expect(page.getByRole('heading', { name: /discover/i, level: 1 })).toBeVisible();
    });

    test('la section genres a un empty state quand no tracks', async ({ page }) => {
      await goToDiscover(page);

      // Click a genre
      await page.locator('button[aria-label*="Browse"]').first().click();
      await page.waitForTimeout(2_000);

      // Should show empty message or tracks
      const body = await page.textContent('body');
      expect(body).toMatch(/no tracks|aucune piste|no hay pistas|track/i);
    });

    test('editorial playlists empty state affiché quand vide', async ({ page }) => {
      await goToDiscover(page);

      // The empty state message should be visible when no editorial playlists
      const section = page.getByRole('region', { name: /editorial/i });
      const sectionText = await section.textContent();
      // Either has playlist cards or the empty message
      expect(sectionText).toMatch(
        /no editorial|aucune playlist|no hay playlist|playlist/i,
      );
    });
  });

  test.describe('Sécurité', () => {
    test('pas de fuite de tokens sensibles dans le DOM', async ({ page }) => {
      await goToDiscover(page);

      const html = await page.content();
      expect(html).not.toMatch(/access_token/);
      expect(html).not.toMatch(/refresh_token/);
    });

    test('XSS via query param genre ne s\'exécute pas', async ({ page }) => {
      let alertTriggered = false;
      page.on('dialog', (dialog) => {
        alertTriggered = true;
        dialog.dismiss();
      });

      await loginViaAPI(page, 'user@veza.music', 'User123!');
      await navigateTo(page, '/discover?genre=<script>alert(1)</script>');

      expect(alertTriggered).toBe(false);
      // Page should not crash
      expect(page.url()).toContain('/discover');
    });
  });

  test.describe('Accessibilité', () => {
    test('les genre buttons ont des aria-labels descriptifs', async ({ page }) => {
      await goToDiscover(page);

      const genreButtons = page.locator('button[aria-label*="Browse"]');
      const count = await genreButtons.count();
      expect(count).toBeGreaterThan(0);

      // Check first button has descriptive label
      const label = await genreButtons.first().getAttribute('aria-label');
      expect(label).toMatch(/browse .+ tracks/i);
    });

    test('les sections ont des rôles region avec aria-label', async ({ page }) => {
      await goToDiscover(page);

      await expect(page.getByRole('region', { name: /by genre|par genre/i })).toBeVisible();
      await expect(page.getByRole('region', { name: /editorial/i })).toBeVisible();
    });

    test('focus order logique via Tab', async ({ page }) => {
      await goToDiscover(page);

      // Tab should hit interactive elements
      await page.keyboard.press('Tab');
      const firstFocused = page.locator(':focus');
      const tag = await firstFocused.evaluate((el) => el.tagName.toLowerCase());
      // Should be a link or button (skip to content or sidebar)
      expect(['a', 'button']).toContain(tag);
    });
  });

  test.describe('i18n', () => {
    test('pas de clés i18n brutes affichées', async ({ page }) => {
      await goToDiscover(page);

      const bodyText = await page.textContent('body') ?? '';
      expect(bodyText).not.toMatch(/discover\.title/);
      expect(bodyText).not.toMatch(/discover\.subtitle/);
      expect(bodyText).not.toMatch(/discover\.byGenre/);
      expect(bodyText).not.toMatch(/discover\.editorialPlaylists/);
    });

    test('pas de mélange FR/EN', async ({ page }) => {
      await goToDiscover(page);

      const bodyText = await page.textContent('body') ?? '';
      // In English mode, should not have hardcoded French
      if (bodyText.includes('Discover')) {
        expect(bodyText).not.toContain('Explorez par genre');
        expect(bodyText).not.toContain('Par genre');
        expect(bodyText).not.toContain('Playlists éditoriales');
      }
    });
  });

  test.describe('Responsive', () => {
    test('tablet 768px — la page se charge correctement', async ({ page }) => {
      await page.setViewportSize({ width: 768, height: 1024 });
      await goToDiscover(page);

      await expect(page.getByRole('heading', { name: /discover/i, level: 1 })).toBeVisible();
      const genreButtons = page.locator('button[aria-label*="Browse"]');
      expect(await genreButtons.count()).toBeGreaterThan(0);
    });

    test('desktop 1280px — layout complet avec grille 5 colonnes', async ({ page }) => {
      await page.setViewportSize({ width: 1280, height: 800 });
      await goToDiscover(page);

      await expect(page.getByRole('heading', { name: /discover/i, level: 1 })).toBeVisible();
      const genreButtons = page.locator('button[aria-label*="Browse"]');
      expect(await genreButtons.count()).toBeGreaterThan(0);
    });
  });

  test.describe('Régression', () => {
    test('[BUG#1] i18n — textes traduits, pas de hardcoded English', async ({ page }) => {
      await goToDiscover(page);

      // Title uses i18n key
      await expect(page.getByRole('heading', { name: /discover/i, level: 1 })).toBeVisible();
      // Subtitle uses i18n key
      const body = await page.textContent('body');
      expect(body).toMatch(/explore by genre|explorez par genre|explora por/i);
    });

    test('[BUG#2] editorial playlists — pas de heading orphelin quand vide', async ({ page }) => {
      await goToDiscover(page);

      const section = page.getByRole('region', { name: /editorial/i });
      await expect(section).toBeVisible();
      const text = await section.textContent();
      // Must have either playlist content or empty state text (not just heading)
      expect(text!.length).toBeGreaterThan(25);
    });

    test('[BUG#3] genre buttons — ont des aria-labels descriptifs', async ({ page }) => {
      await goToDiscover(page);

      const firstBtn = page.locator('button[aria-label*="Browse"]').first();
      await expect(firstBtn).toBeVisible();
      const label = await firstBtn.getAttribute('aria-label');
      expect(label).toMatch(/browse .+ tracks/i);
    });
  });
});