import { test, expect } from '@playwright/test';
import { loginViaAPI,
  CONFIG,
  navigateTo,
  assertNotBroken,
  assertNoDebugText,
  testId,
  SELECTORS,
} from './helpers';

// =============================================================================
// EMPTY STATES — Affichage des etats vides
// =============================================================================

test.describe('EMPTY STATES — Affichage des etats vides @feature-empty-states', () => {
  // Fresh user credentials — registered in beforeAll so they have zero data
  const freshPassword = 'SecurePass123!@#';
  let freshUserEmail: string;
  let freshUsername: string;

  test.beforeAll(async ({ request }) => {
    const ts = Date.now();
    freshUserEmail = `e2e-empty-${ts}@veza.test`;
    freshUsername = `e2e_empty_${ts}`;

    const response = await request.post('/api/v1/auth/register', {
      data: {
        email: freshUserEmail,
        password: freshPassword,
        username: freshUsername,
        password_confirmation: freshPassword,
      },
    });

    if (response.ok()) {
      console.log(`  Fresh user registered: ${freshUserEmail}`);
    } else {
      // If registration fails (e.g. endpoint shape differs), fall back to listener account
      console.log(`  ⚠ Fresh user registration failed (${response.status()}), tests will adapt`);
    }
  });

  /**
   * Helper: login as the fresh user. Falls back to listener if fresh user was not created.
   */
  async function loginAsFreshUser(page: import('@playwright/test').Page): Promise<boolean> {
    try {
      await loginViaAPI(page, freshUserEmail, freshPassword);
      // Verify we left /login
      if (page.url().includes('/login')) {
        throw new Error('Still on login page');
      }
      return true;
    } catch {
      // Fallback: use listener account (may not have truly empty states)
      console.log('  ⚠ Falling back to listener account');
      try {
        await loginViaAPI(page, CONFIG.users.listener.email, CONFIG.users.listener.password);
        // Check that fallback login also succeeded
        if (page.url().includes('/login')) {
          console.log('  ⚠ Fallback login also failed — still on /login');
          return false;
        }
        return true;
      } catch {
        console.log('  ⚠ Fallback login threw an error');
        return false;
      }
    }
  }

  /**
   * Assert that an empty state component is visible on the page.
   * The app uses EmptyState with a title, description, and optional action button.
   */
  async function assertEmptyState(
    page: import('@playwright/test').Page,
    options: {
      expectedTextPatterns?: RegExp[];
      ctaPattern?: RegExp;
      allowContent?: boolean;
    } = {},
  ): Promise<{ hasEmptyState: boolean; hasCta: boolean }> {
    await assertNotBroken(page);
    await assertNoDebugText(page);

    const body = await page.textContent('body') || '';

    // Look for EmptyState component patterns
    const emptyStateComponent = page.locator('[class*="empty-state"], [class*="EmptyState"], [data-testid*="empty"]')
      .or(page.getByText(/no .* yet|aucun|vide|nothing|get started|pas encore/i).first());

    const hasEmptyState = await emptyStateComponent.first().isVisible().catch(() => false);

    // Also check for common empty state text patterns
    const emptyTextPatterns = [
      /no .* yet/i,
      /aucun/i,
      /nothing (here|found|to show)/i,
      /get started/i,
      /pas encore/i,
      /empty/i,
      /start by/i,
      /browse|discover|explore/i,
    ];

    let hasEmptyText = false;
    for (const pattern of emptyTextPatterns) {
      if (pattern.test(body)) {
        hasEmptyText = true;
        break;
      }
    }

    // Check for additional expected patterns
    if (options.expectedTextPatterns) {
      for (const pattern of options.expectedTextPatterns) {
        const matches = pattern.test(body);
        if (matches) hasEmptyText = true;
      }
    }

    // Check for CTA button
    let hasCta = false;
    if (options.ctaPattern) {
      const ctaBtn = page.getByRole('button', { name: options.ctaPattern })
        .or(page.getByRole('link', { name: options.ctaPattern }));
      hasCta = await ctaBtn.first().isVisible().catch(() => false);
    }

    return { hasEmptyState: hasEmptyState || hasEmptyText, hasCta };
  }

  // ---------------------------------------------------------------------------
  // Individual empty state tests
  // ---------------------------------------------------------------------------

  test('01. Bibliotheque vide — message + CTA upload @critical', async ({ page }) => {
    const loggedIn = await loginAsFreshUser(page);
    if (!loggedIn) { console.log('  ⚠ Login failed — skipping'); return; }
    await navigateTo(page, '/library');

    const { hasEmptyState, hasCta } = await assertEmptyState(page, {
      expectedTextPatterns: [/library|bibliothèque|tracks|upload/i],
      ctaPattern: /upload|importer|ajouter|add/i,
    });

    console.log(`  /library empty state: ${hasEmptyState ? '✓' : '✗'}`);
    console.log(`  /library CTA button: ${hasCta ? '✓' : '✗'}`);

    // Page should not be blank
    const body = await page.textContent('body') || '';
    expect(body.length).toBeGreaterThan(50);
  });

  test('02. Playlists vides — message + CTA creer', async ({ page }) => {
    const loggedIn = await loginAsFreshUser(page);
    if (!loggedIn) { console.log('  ⚠ Login failed — skipping'); return; }
    await navigateTo(page, '/playlists');

    const { hasEmptyState, hasCta } = await assertEmptyState(page, {
      expectedTextPatterns: [/playlist/i],
      ctaPattern: /créer|create|nouvelle|new/i,
    });

    console.log(`  /playlists empty state: ${hasEmptyState ? '✓' : '✗'}`);
    console.log(`  /playlists CTA button: ${hasCta ? '✓' : '✗'}`);

    const body = await page.textContent('body') || '';
    expect(body.length).toBeGreaterThan(50);
  });

  test('03. Notifications vides — message approprie', async ({ page }) => {
    await loginAsFreshUser(page);
    await navigateTo(page, '/notifications');

    const { hasEmptyState } = await assertEmptyState(page, {
      expectedTextPatterns: [/notification|aucune|no notification/i],
    });

    console.log(`  /notifications empty state: ${hasEmptyState ? '✓' : '✗'}`);

    await assertNotBroken(page);
  });

  test('04. Feed vide — message + suggestion', async ({ page }) => {
    await loginAsFreshUser(page);
    await navigateTo(page, '/feed');

    const { hasEmptyState } = await assertEmptyState(page, {
      expectedTextPatterns: [/feed|follow|suivre|discover|découvr/i],
    });

    console.log(`  /feed empty state: ${hasEmptyState ? '✓' : '✗'}`);

    // Page should load without crash
    await assertNotBroken(page);
  });

  test('05. Recherche sans resultat — message "aucun resultat"', async ({ page }) => {
    await loginAsFreshUser(page);
    await navigateTo(page, '/search');

    // Type a query that will return no results
    const searchInput = page.locator('input[role="combobox"][aria-label="Search"]')
      .or(page.getByPlaceholder(/search for tracks/i))
      .or(page.locator(SELECTORS.searchInput));

    if (await searchInput.first().isVisible().catch(() => false)) {
      await searchInput.first().fill('xyznoexist999zzz');
      // Wait for debounce + network
      await page.waitForTimeout(2_000);
    } else {
      // Navigate with query param
      await navigateTo(page, '/search?q=xyznoexist999zzz');
      await page.waitForTimeout(2_000);
    }

    const body = await page.textContent('body') || '';
    const hasNoResults = /no results|aucun résultat|nothing found|no .* found/i.test(body);

    console.log(`  Search no-results message: ${hasNoResults ? '✓' : '✗'}`);
    await assertNotBroken(page);
  });

  test('06. Queue vide — message', async ({ page }) => {
    const loggedIn = await loginAsFreshUser(page);
    if (!loggedIn) { console.log('  ⚠ Login failed — skipping'); return; }
    await navigateTo(page, '/queue');

    const { hasEmptyState } = await assertEmptyState(page, {
      expectedTextPatterns: [/queue|file d'attente|no tracks|aucun/i],
    });

    console.log(`  /queue empty state: ${hasEmptyState ? '✓' : '✗'}`);
    await assertNotBroken(page);
  });

  test('07. Chat sans conversation — message + CTA', async ({ page }) => {
    await loginAsFreshUser(page);
    await navigateTo(page, '/chat');

    const { hasEmptyState } = await assertEmptyState(page, {
      expectedTextPatterns: [/chat|conversation|message|channel/i],
    });

    console.log(`  /chat empty state: ${hasEmptyState ? '✓' : '✗'}`);
    await assertNotBroken(page);
  });

  test('08. Wishlist vide — message + CTA browse', async ({ page }) => {
    const loggedIn = await loginAsFreshUser(page);
    if (!loggedIn) { console.log('  ⚠ Login failed — skipping'); return; }
    await navigateTo(page, '/wishlist');

    const { hasEmptyState, hasCta } = await assertEmptyState(page, {
      expectedTextPatterns: [/wishlist|favoris|souhaits|no items/i],
      ctaPattern: /browse|parcourir|discover|explorer|marketplace/i,
    });

    console.log(`  /wishlist empty state: ${hasEmptyState ? '✓' : '✗'}`);
    console.log(`  /wishlist CTA button: ${hasCta ? '✓' : '✗'}`);
    await assertNotBroken(page);
  });

  test('09. Purchases vides — message', async ({ page }) => {
    await loginAsFreshUser(page);
    await navigateTo(page, '/purchases');

    const { hasEmptyState } = await assertEmptyState(page, {
      expectedTextPatterns: [/purchase|achat|order|commande|no .* yet/i],
    });

    console.log(`  /purchases empty state: ${hasEmptyState ? '✓' : '✗'}`);
    await assertNotBroken(page);
  });

  test('10. Analytics sans donnees — message ou graphe a zero (creator)', async ({ page }) => {
    // Use creator account for analytics, but a fresh creator would have no data
    // Try fresh user first, fallback to existing creator
    const loggedIn = await loginAsFreshUser(page);
    if (!loggedIn) { console.log('  ⚠ Login failed — skipping'); return; }
    await navigateTo(page, '/analytics');

    const body = await page.textContent('body') || '';

    // Analytics page may show zero-state graphs, empty messages, or redirect
    const hasEmptyAnalytics = /no data|aucune donnée|analytics|statistiques|0 plays|0 streams/i.test(body);
    const hasChartArea = await page.locator('canvas, svg, [class*="chart"], [class*="graph"]')
      .first().isVisible().catch(() => false);

    // At minimum, the page should not crash
    await assertNotBroken(page);

    console.log(`  /analytics empty state text: ${hasEmptyAnalytics ? '✓' : '✗'}`);
    console.log(`  /analytics chart area: ${hasChartArea ? '✓ (zero-state chart)' : '✗'}`);
  });
});