/**
 * E2E Tests for Authentication Flow
 * Tests user registration, login, and OAuth
 */

import { test, expect } from '@playwright/test';

test.describe('Authentication', () => {
  test.beforeEach(async ({ page }) => {
    await page.goto('/');
  });

  test.describe('User Registration', () => {
    test('should display registration page', async ({ page }) => {
      await page.goto('/register');
      
      await expect(page.locator('h1')).toContainText('Basil');
      await expect(page.locator('input[type="email"]')).toBeVisible();
      await expect(page.locator('input[type="password"]')).toBeVisible();
    });

    test('should register new user successfully', async ({ page }) => {
      await page.goto('/register');
      
      const timestamp = Date.now();
      const email = `test-${timestamp}@example.com`;
      const password = 'TestPassword123';
      
      await page.fill('input[type="email"]', email);
      await page.fill('input[name="name"]', 'Test User');
      await page.fill('input[type="password"]', password);
      
      await page.click('button[type="submit"]');
      
      // Should show success message or redirect
      await expect(page).toHaveURL(/\/(login|verify-email)/);
    });

    test('should show error for weak password', async ({ page }) => {
      await page.goto('/register');
      
      await page.fill('input[type="email"]', 'test@example.com');
      await page.fill('input[type="password"]', 'weak');
      await page.click('button[type="submit"]');
      
      // Should display error message
      await expect(page.locator('.error, .auth-error')).toBeVisible();
    });

    test('should show error for duplicate email', async ({ page }) => {
      await page.goto('/register');
      
      await page.fill('input[type="email"]', 'existing@example.com');
      await page.fill('input[type="password"]', 'TestPassword123');
      await page.click('button[type="submit"]');
      
      // Should show error if email already exists
      // Or allow registration (depends on implementation)
    });

    test('should validate email format', async ({ page }) => {
      await page.goto('/register');
      
      await page.fill('input[type="email"]', 'invalid-email');
      await page.fill('input[type="password"]', 'TestPassword123');
      await page.click('button[type="submit"]');
      
      // Should show validation error or prevent submission
      const emailInput = page.locator('input[type="email"]');
      await expect(emailInput).toHaveAttribute('type', 'email');
    });
  });

  test.describe('User Login', () => {
    test('should display login page', async ({ page }) => {
      await page.goto('/login');
      
      await expect(page.locator('h1, h2')).toContainText(/Welcome|Login|Sign/i);
      await expect(page.locator('input[type="email"]')).toBeVisible();
      await expect(page.locator('input[type="password"]')).toBeVisible();
    });

    test('should show Google OAuth button', async ({ page }) => {
      await page.goto('/login');
      
      const googleButton = page.locator('button:has-text("Google"), button:has-text("Continue with Google")');
      await expect(googleButton).toBeVisible();
    });

    test('should login with valid credentials', async ({ page, context }) => {
      // Create test user first (or use existing)
      await page.goto('/login');
      
      await page.fill('input[type="email"]', 'test@example.com');
      await page.fill('input[type="password"]', 'TestPassword123');
      await page.click('button[type="submit"]');
      
      // Should redirect to home or dashboard after login
      // Check for authentication token in localStorage or cookies
      await page.waitForURL('/', { timeout: 5000 }).catch(() => {});
      
      const cookies = await context.cookies();
      const hasAuthCookie = cookies.some(cookie => 
        cookie.name.includes('token') || cookie.name.includes('auth')
      );
      
      // Should have auth token in storage
      const hasToken = await page.evaluate(() => {
        return localStorage.getItem('basil_access_token') !== null;
      });
      
      expect(hasToken || hasAuthCookie).toBeTruthy();
    });

    test('should show error for invalid credentials', async ({ page }) => {
      await page.goto('/login');
      
      await page.fill('input[type="email"]', 'wrong@example.com');
      await page.fill('input[type="password"]', 'WrongPassword');
      await page.click('button[type="submit"]');
      
      // Should display error message
      await expect(page.locator('.error, .auth-error')).toBeVisible({ timeout: 5000 });
    });

    test('should show error for unverified email', async ({ page }) => {
      // This test depends on having an unverified user
      // Skip or implement based on your setup
    });

    test('should have forgot password link', async ({ page }) => {
      await page.goto('/login');
      
      const forgotLink = page.locator('a:has-text("Forgot password")');
      await expect(forgotLink).toBeVisible();
      
      await forgotLink.click();
      await expect(page).toHaveURL(/forgot-password/);
    });

    test('should have link to registration page', async ({ page }) => {
      await page.goto('/login');
      
      const signupLink = page.locator('a:has-text("Sign up")');
      await expect(signupLink).toBeVisible();
      
      await signupLink.click();
      await expect(page).toHaveURL(/register/);
    });
  });

  test.describe('Google OAuth', () => {
    test('should redirect to Google OAuth', async ({ page }) => {
      await page.goto('/login');
      
      const googleButton = page.locator('button:has-text("Google"), button:has-text("Continue with Google")');
      await googleButton.click();
      
      // Should redirect to /api/auth/google which then redirects to Google
      // We can't test the actual Google OAuth flow, but we can test the redirect
      await page.waitForTimeout(1000);
      
      // URL should change (either to Google or to API endpoint)
      const currentUrl = page.url();
      expect(currentUrl).not.toBe('http://localhost:5173/login');
    });

    test('should handle OAuth callback', async ({ page }) => {
      // Simulate OAuth callback with tokens
      await page.goto('/auth/callback?accessToken=test_token&refreshToken=test_refresh');
      
      // Should store tokens and redirect
      const hasToken = await page.evaluate(() => {
        return localStorage.getItem('basil_access_token') !== null;
      });
      
      // Should redirect to home after callback
      await expect(page).toHaveURL('/', { timeout: 5000 }).catch(() => {});
    });

    test('should handle OAuth error', async ({ page }) => {
      await page.goto('/login?error=oauth_callback_failed');
      
      // Should display error message
      const errorMessage = page.locator('.error, .auth-error');
      await expect(errorMessage).toBeVisible();
    });
  });

  test.describe('Logout', () => {
    test('should logout and clear session', async ({ page }) => {
      // First login
      await page.goto('/login');
      // ... login logic ...
      
      // Then logout
      const logoutButton = page.locator('button:has-text("Logout"), button:has-text("Sign out")');
      if (await logoutButton.isVisible()) {
        await logoutButton.click();
        
        // Should clear tokens
        const hasToken = await page.evaluate(() => {
          return localStorage.getItem('basil_access_token') === null;
        });
        
        expect(hasToken).toBeTruthy();
        
        // Should redirect to login
        await expect(page).toHaveURL(/login/);
      }
    });
  });

  test.describe('Protected Routes', () => {
    test('should redirect to login when accessing protected route', async ({ page }) => {
      // Clear any existing auth
      await page.context().clearCookies();
      await page.evaluate(() => localStorage.clear());
      
      // Try to access protected route
      await page.goto('/recipes/new');
      
      // Should redirect to login
      await expect(page).toHaveURL(/login/, { timeout: 5000 });
    });

    test('should allow access to protected route when authenticated', async ({ page }) => {
      // Set auth token in localStorage
      await page.evaluate(() => {
        localStorage.setItem('basil_access_token', 'test_token');
        localStorage.setItem('basil_user', JSON.stringify({
          id: 'test-user',
          email: 'test@example.com',
        }));
      });
      
      await page.goto('/recipes');
      
      // Should NOT redirect to login
      await expect(page).toHaveURL(/recipes/);
    });
  });
});