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

test.describe('Checkout Flow - Comprehensive Testing', () => {
  let page: Page;

  test.beforeEach(async ({ browser }) => {
    page = await browser.newPage();
    
    // Navigate to the app and ensure it's loaded
    await page.goto('/');
    
    // Mock authentication - log in as admin
    await page.goto('/login');
    await page.click('[data-role="admin"]');
    await page.waitForURL('/dashboard');
    
    // Ensure page is fully loaded
    await page.waitForSelector('text=Dashboard');
  });

  test.afterEach(async () => {
    await page.close();
  });

  test.describe('Shopping Cart Functionality', () => {
    test('should add items to cart and manage quantities', async () => {
      // Navigate to an event page with ticket purchase option
      await page.click('text=Events');
      await page.waitForSelector('[data-testid="event-card"]');
      await page.click('[data-testid="event-card"]');
      
      // Look for ticket purchase component
      const ticketPurchase = page.locator('[data-testid="ticket-purchase"]');
      if (await ticketPurchase.count() > 0) {
        // Set quantity
        await page.click('button:has-text("+")')
        const quantityDisplay = page.locator('text=2');
        await expect(quantityDisplay).toBeVisible();
        
        // Add to cart
        await page.click('button:has-text("Add to Cart")');
        
        // Verify cart button shows item count
        const cartButton = page.locator('[data-testid="cart-button"]');
        await expect(cartButton).toContainText('2');
      }
    });

    test('should open cart drawer and display items correctly', async () => {
      // Add item to cart first (reuse logic from previous test or use mock)
      // Click cart button
      await page.click('[data-testid="cart-button"]');
      
      // Verify cart drawer opens
      await expect(page.locator('[role="dialog"]')).toBeVisible();
      await expect(page.locator('text=Shopping Cart')).toBeVisible();
      
      // Check accessibility
      await expect(page.locator('[aria-labelledby="cart-title"]')).toBeVisible();
      await expect(page.locator('#cart-title')).toHaveText('Shopping Cart');
    });

    test('should update item quantities in cart drawer', async () => {
      // Open cart with items
      await page.click('[data-testid="cart-button"]');
      
      // Find quantity controls
      const increaseBtn = page.locator('[aria-label*="Increase quantity"]').first();
      
      if (await increaseBtn.count() > 0) {
        await increaseBtn.click();
        
        // Verify quantity updated
        const quantityText = page.locator('[data-testid="item-quantity"]').first();
        await expect(quantityText).not.toBeEmpty();
      }
    });

    test('should remove items from cart', async () => {
      // Open cart
      await page.click('[data-testid="cart-button"]');
      
      // Click remove button if items exist
      const removeButton = page.locator('[data-testid="remove-item"]').first();
      if (await removeButton.count() > 0) {
        await removeButton.click();
        
        // Verify item removed
        await expect(page.locator('text=Your cart is empty')).toBeVisible({ timeout: 5000 });
      }
    });
  });

  test.describe('Checkout Wizard - Multi-step Flow', () => {
    test('should open checkout wizard from cart', async () => {
      // Add item and open checkout
      await page.click('[data-testid="cart-button"]');
      
      const checkoutButton = page.locator('button:has-text("Proceed to Checkout")');
      if (await checkoutButton.count() > 0) {
        await checkoutButton.click();
        
        // Verify wizard opens
        await expect(page.locator('[role="dialog"]')).toBeVisible();
        await expect(page.locator('#checkout-title')).toHaveText('Checkout');
        
        // Check step indicator
        await expect(page.locator('[aria-label="Checkout progress"]')).toBeVisible();
      }
    });

    test('should navigate through checkout steps', async () => {
      // Open checkout wizard (mock if needed)
      await page.evaluate(() => {
        // Mock opening checkout wizard
        const event = new CustomEvent('openCheckout');
        document.dispatchEvent(event);
      });
      
      // Navigate through steps
      const continueButton = page.locator('button:has-text("Continue")');
      
      if (await continueButton.count() > 0) {
        // Step 1: Cart Review
        await expect(page.locator('text=Review Your Order')).toBeVisible();
        await continueButton.click();
        
        // Step 2: Customer Information
        await expect(page.locator('text=Customer Information')).toBeVisible();
        
        // Fill out customer form
        await page.fill('input[placeholder="John"]', 'John');
        await page.fill('input[placeholder="Doe"]', 'Doe');
        await page.fill('input[placeholder="john.doe@example.com"]', 'test@example.com');
        await page.fill('input[placeholder*="555"]', '+1 555-123-4567');
        
        await continueButton.click();
        
        // Step 3: Payment Method
        await expect(page.locator('text=Payment Method')).toBeVisible();
        
        // Select payment method
        const creditCardOption = page.locator('text=Credit/Debit Card');
        if (await creditCardOption.count() > 0) {
          await creditCardOption.click();
        }
        
        await continueButton.click();
        
        // Step 4: Confirmation
        await expect(page.locator('text=Confirm Your Order')).toBeVisible();
      }
    });

    test('should validate customer information form', async () => {
      // Open checkout wizard
      // Navigate to customer step
      
      const continueButton = page.locator('button:has-text("Continue")');
      
      // Try to continue without filling required fields
      if (await continueButton.count() > 0) {
        await continueButton.click();
        
        // Check for validation errors
        // Validation should prevent advancement
      }
      
      // Fill invalid email
      await page.fill('input[type="email"]', 'invalid-email');
      
      if (await continueButton.count() > 0) {
        await continueButton.click();
        // Should show email validation error
      }
    });

    test('should handle payment method selection', async () => {
      // Navigate to payment step
      const paymentMethods = page.locator('[data-testid="payment-method"]');
      
      if (await paymentMethods.count() > 0) {
        // Test selecting different payment methods
        const cardOption = page.locator('text=Credit/Debit Card');
        const paypalOption = page.locator('text=PayPal');
        
        if (await cardOption.count() > 0) {
          await cardOption.click();
          await expect(cardOption).toHaveClass(/border-primary/);
        }
        
        if (await paypalOption.count() > 0) {
          await paypalOption.click();
          await expect(paypalOption).toHaveClass(/border-primary/);
        }
      }
    });
  });

  test.describe('Error Handling and Recovery', () => {
    test('should display error screen for checkout failures', async () => {
      // Mock checkout error
      await page.evaluate(() => {
        // Simulate checkout error
        (window as any).mockCheckoutError = {
          type: 'payment_failed',
          message: 'Payment failed',
          details: 'Your card was declined',
          retryable: true
        };
      });
      
      // Check if error handler displays
      const errorHandler = page.locator('[data-testid="checkout-error"]');
      if (await errorHandler.count() > 0) {
        await expect(errorHandler).toBeVisible();
        await expect(page.locator('text=Payment Failed')).toBeVisible();
      }
    });

    test('should provide retry functionality for retryable errors', async () => {
      // Test retry button functionality
      const retryButton = page.locator('button:has-text("Try Again")');
      
      if (await retryButton.count() > 0) {
        await retryButton.click();
        // Should attempt checkout again
      }
    });

    test('should offer alternative actions for non-retryable errors', async () => {
      // Test alternative action buttons
      const changePaymentButton = page.locator('button:has-text("Try Different Card")');
      const contactSupportButton = page.locator('button:has-text("Contact Support")');
      
      if (await changePaymentButton.count() > 0) {
        await changePaymentButton.click();
        // Should navigate back to payment step
      }
      
      if (await contactSupportButton.count() > 0) {
        await contactSupportButton.click();
        // Should open support contact method
      }
    });
  });

  test.describe('Order Confirmation and Receipt', () => {
    test('should display order confirmation after successful checkout', async () => {
      // Mock successful checkout completion
      await page.goto('/checkout/success?session_id=test_session_123');
      
      // Wait for success page to load
      await expect(page.locator('text=Purchase Successful!')).toBeVisible({ timeout: 10000 });
      
      // Check for success elements
      await expect(page.locator('[data-testid="success-icon"]')).toBeVisible();
      await expect(page.locator('text=Your tickets have been confirmed')).toBeVisible();
    });

    test('should display detailed receipt information', async () => {
      // On checkout success page
      await page.goto('/checkout/success?session_id=test_session_123');
      
      // Click view receipt button
      const viewReceiptButton = page.locator('button:has-text("View Receipt")');
      if (await viewReceiptButton.count() > 0) {
        await viewReceiptButton.click();
        
        // Verify receipt displays
        await expect(page.locator('text=Order Receipt')).toBeVisible();
        await expect(page.locator('text=Customer Details')).toBeVisible();
        await expect(page.locator('text=Payment Information')).toBeVisible();
        await expect(page.locator('text=Ticket Details')).toBeVisible();
      }
    });

    test('should provide receipt download and email options', async () => {
      // Test receipt action buttons
      const downloadButton = page.locator('button:has-text("Download PDF")');
      const emailButton = page.locator('button:has-text("Email Receipt")');
      const calendarButton = page.locator('button:has-text("Add to Calendar")');
      
      // These would typically trigger download/email actions
      if (await downloadButton.count() > 0) {
        await downloadButton.click();
        // Verify download action (would need to mock in real test)
      }
      
      if (await emailButton.count() > 0) {
        await emailButton.click();
        // Verify email action
      }
      
      if (await calendarButton.count() > 0) {
        await calendarButton.click();
        // Verify calendar integration
      }
    });
  });

  test.describe('Accessibility and Mobile Experience', () => {
    test('should be fully keyboard navigable', async () => {
      // Test keyboard navigation through checkout
      await page.keyboard.press('Tab');
      
      // Verify focus management
      const focusedElement = page.locator(':focus');
      await expect(focusedElement).toBeVisible();
      
      // Test arrow key navigation in step indicator
      await page.keyboard.press('ArrowRight');
      await page.keyboard.press('ArrowLeft');
      
      // Test escape key closes modals
      await page.keyboard.press('Escape');
    });

    test('should have proper ARIA labels and roles', async () => {
      // Check checkout wizard accessibility
      await expect(page.locator('[role="dialog"]')).toHaveAttribute('aria-modal', 'true');
      await expect(page.locator('[aria-labelledby="checkout-title"]')).toBeVisible();
      
      // Check form accessibility
      const requiredInputs = page.locator('input[required]');
      const inputCount = await requiredInputs.count();
      
      for (let i = 0; i < inputCount; i++) {
        const input = requiredInputs.nth(i);
        await expect(input).toHaveAttribute('aria-required', 'true');
      }
      
      // Check button accessibility
      const buttons = page.locator('button[aria-label]');
      const buttonCount = await buttons.count();
      
      for (let i = 0; i < buttonCount; i++) {
        const button = buttons.nth(i);
        const ariaLabel = await button.getAttribute('aria-label');
        expect(ariaLabel).toBeTruthy();
      }
    });

    test('should work well on mobile viewport', async () => {
      // Set mobile viewport
      await page.setViewportSize({ width: 375, height: 667 });
      
      // Test cart drawer on mobile
      await page.click('[data-testid="cart-button"]');
      
      // Verify drawer takes full width on mobile
      const drawer = page.locator('[role="dialog"]');
      if (await drawer.count() > 0) {
        const boundingBox = await drawer.boundingBox();
        expect(boundingBox?.width).toBeGreaterThan(300); // Should be near full width
      }
      
      // Test touch targets are large enough (44px minimum)
      const buttons = page.locator('button');
      const buttonCount = await buttons.count();
      
      for (let i = 0; i < Math.min(buttonCount, 5); i++) {
        const button = buttons.nth(i);
        if (await button.isVisible()) {
          const boundingBox = await button.boundingBox();
          if (boundingBox) {
            expect(boundingBox.height).toBeGreaterThanOrEqual(40); // Close to 44px minimum
          }
        }
      }
    });

    test('should handle screen reader announcements', async () => {
      // Test aria-live regions
      await expect(page.locator('[aria-live="polite"]')).toBeVisible();
      
      // Test status announcements
      // Status messages should be announced to screen readers
    });
  });

  test.describe('Performance and Edge Cases', () => {
    test('should handle large cart quantities', async () => {
      // Test cart with maximum allowed quantities
      await page.evaluate(() => {
        // Mock large cart
        (window as any).mockLargeCart = true;
      });
      
      // Verify cart performance with many items
      await page.click('[data-testid="cart-button"]');
      
      // Should render efficiently
      await expect(page.locator('text=Shopping Cart')).toBeVisible({ timeout: 3000 });
    });

    test('should handle network interruptions gracefully', async () => {
      // Mock network failure during checkout
      await page.route('**/api/checkout', route => {
        route.abort('failed');
      });
      
      // Attempt checkout
      const checkoutButton = page.locator('button:has-text("Complete Purchase")');
      if (await checkoutButton.count() > 0) {
        await checkoutButton.click();
        
        // Should display network error
        await expect(page.locator('text=Connection Problem')).toBeVisible({ timeout: 10000 });
      }
    });

    test('should clear cart after successful purchase', async () => {
      // Complete successful checkout
      await page.goto('/checkout/success?session_id=test_session_123');
      
      // Navigate back to cart
      await page.goto('/dashboard');
      await page.click('[data-testid="cart-button"]');
      
      // Cart should be empty
      await expect(page.locator('text=Your cart is empty')).toBeVisible();
    });

    test('should preserve cart data on page refresh', async () => {
      // Add items to cart
      // Refresh page
      await page.reload();
      
      // Cart should still contain items (localStorage persistence)
      await page.click('[data-testid="cart-button"]');
      
      // Items should still be there (or empty if not implemented)
    });
  });

  test.describe('Integration with Existing System', () => {
    test('should integrate with event data correctly', async () => {
      // Test that checkout uses real event data
      const eventTitle = await page.locator('[data-testid="event-title"]').first().textContent();
      
      if (eventTitle) {
        // Add to cart and verify event info carries through
        await page.click('button:has-text("Add to Cart")');
        await page.click('[data-testid="cart-button"]');
        
        await expect(page.locator(`text=${eventTitle}`)).toBeVisible();
      }
    });

    test('should respect user authentication state', async () => {
      // Test checkout behavior for different user roles
      await expect(page.locator('[data-testid="user-role"]')).toContainText('admin');
      
      // Should show admin-appropriate checkout options
    });

    test('should handle organization context properly', async () => {
      // Verify checkout respects current organization
      const orgName = await page.locator('[data-testid="current-org"]').textContent();
      
      if (orgName) {
        // Checkout should use organization-specific settings
      }
    });
  });
});