padelclub_backend/shop/views.py

from .stripe_utils import stripe_service
from django.shortcuts import render, redirect, get_object_or_404
from django.contrib import messages
from .models import Product, Order, OrderItem, GuestUser, OrderStatus, Coupon, CouponUsage
from django.db.models import Sum
from .forms import GuestCheckoutForm
import stripe
from django.conf import settings
from django.urls import reverse
from django.http import JsonResponse
from django.views.decorators.http import require_POST
from django.views.decorators.csrf import ensure_csrf_cookie
from django.http import HttpResponse
from django.views.decorators.csrf import csrf_exempt
from django.utils import timezone
from .forms import ShippingAddressForm
import json  # Add this with your other imports

from . import cart

# Shared helper methods
def _check_stripe_config():
    """Check if Stripe API keys are properly configured"""
    return hasattr(settings, 'STRIPE_SECRET_KEY') and settings.STRIPE_SECRET_KEY

def _create_stripe_line_items(order_items):
    """Create line items for Stripe checkout from order items"""
    line_items = []
    for item in order_items:
        item_price = int(float(item.price) * 100)  # Convert to cents

        line_items.append({
            'price_data': {
                'currency': 'eur',
                'product_data': {
                    'name': item.product.title,
                    'description': f"Color: {item.color.name if item.color else 'N/A'}, Size: {item.size.name if item.size else 'N/A'}",
                },
                'unit_amount': item_price,
            },
            'quantity': item.quantity,
        })
    return line_items

def _create_stripe_checkout_session(request, order, line_items):
    """Create a Stripe checkout session for the order"""
    # Create success and cancel URLs
    success_url = request.build_absolute_uri(reverse('shop:payment_success', args=[order.id]))
    cancel_url = request.build_absolute_uri(reverse('shop:payment_cancel', args=[order.id]))

    # Create metadata to identify this order
    metadata = {
        'order_id': str(order.id),
    }

    # Set up customer information
    customer_email = None

    # Add user info to metadata if available
    if request.user.is_authenticated:
        metadata['user_id'] = str(request.user.id)
        customer_email = request.user.email
    elif order.guest_user:
        metadata['guest_email'] = order.guest_user.email
        customer_email = order.guest_user.email
    elif 'guest_email' in request.session:
        metadata['guest_email'] = request.session.get('guest_email', '')
        customer_email = request.session.get('guest_email', '')

    # Handle coupon discount in Stripe
    discounts = None
    if order.coupon and order.discount_amount > 0:
        try:
            # Create or retrieve a Stripe coupon
            if order.coupon.stripe_coupon_id:
                # Use existing Stripe coupon
                stripe_coupon_id = order.coupon.stripe_coupon_id
            else:
                # Create a new Stripe coupon
                if order.coupon.discount_percent > 0:
                    stripe_coupon = stripe.Coupon.create(
                        percent_off=float(order.coupon.discount_percent),
                        duration='once',
                        name=order.coupon.code
                    )
                else:
                    stripe_coupon = stripe.Coupon.create(
                        amount_off=int(float(order.coupon.discount_amount) * 100),  # Convert to cents
                        currency='eur',
                        duration='once',
                        name=order.coupon.code
                    )

                # Save the Stripe coupon ID for future use
                stripe_coupon_id = stripe_coupon.id
                order.coupon.stripe_coupon_id = stripe_coupon_id
                order.coupon.save()

            # Add the coupon to the checkout session
            discounts = [{'coupon': stripe_coupon_id}]
        except Exception as e:
            print(f"Error creating Stripe coupon: {str(e)}")
            # Continue without the discount if there was an error

    session_params = {
        'customer_email': customer_email,
        'line_items': line_items,
        'success_url': success_url,
        'cancel_url': cancel_url,
        'metadata': metadata,
    }

    # Add discounts if available
    if discounts:
        session_params['discounts'] = discounts

    try:
        # Use the service to create the session
        checkout_session = stripe_service.create_checkout_session(**session_params)

        # Save the checkout session ID to the order
        order.stripe_checkout_session_id = checkout_session.id
        order.save()

        return checkout_session

    except Exception as e:
        print(f"Stripe error: {str(e)}")
        raise

# View functions
def product_list(request):
    products = Product.objects.all()
    cart_items = cart.get_cart_items(request)
    total = cart.get_cart_total(request)
    return render(request, 'shop/product_list.html', {
        'products': products,
        'cart_items': cart_items,
        'total': total
    })

def view_cart(request):
    """Display the shopping cart"""
    cart_items = cart.get_cart_items(request)
    total = cart.get_cart_total(request)
    total_quantity = cart_items.aggregate(total_quantity=Sum('quantity'))['total_quantity']
    display_data = prepare_item_display_data(cart_items, is_cart=True)

    context = {
        'display_data': display_data,
        'total': total,
        'total_quantity': total_quantity,
        'settings': settings,
    }

    # Add shipping form and Stripe key for authenticated users
    if request.user.is_authenticated:
        context.update({
            'stripe_publishable_key': settings.STRIPE_PUBLISHABLE_KEY,
            'shipping_form': ShippingAddressForm()
        })

    return render(request, 'shop/cart.html', context)

@ensure_csrf_cookie
def add_to_cart_view(request, product_id):
    """Add a product to the cart"""
    product = get_object_or_404(Product, id=product_id)
    quantity = int(request.POST.get('quantity', 1))
    color_id = request.POST.get('color')
    size_id = request.POST.get('size')

    cart_item = cart.add_to_cart(request, product_id, quantity, color_id, size_id)
    message = f'{cart_item.quantity} x {product.title} dans le panier',

    # Check if this is an AJAX request
    if request.headers.get('X-Requested-With') == 'XMLHttpRequest':
        cart_items = cart.get_cart_items(request)
        total = cart.get_cart_total(request)
        return JsonResponse({
            'success': True,
            'message': message,
            'cart_total': total,
            'cart_count': cart_items.count()
        })

    # For non-AJAX requests, fall back to the original behavior
    messages.success(request, message)
    return redirect('shop:product_list')

def update_cart_view(request, product_id):
    """Update cart item quantity"""
    if request.method == 'POST':
        quantity = int(request.POST.get('quantity', 0))
        cart.update_cart_item(request, product_id, quantity)
    return redirect('shop:view_cart')

def remove_from_cart_view(request, product_id):
    """Remove item from cart"""
    cart.remove_from_cart(request, product_id)
    return redirect('shop:view_cart')

def clear_cart(request):
    """Clear the cart"""
    cart.clear_cart(request)
    messages.success(request, "Your cart has been cleared.")
    return redirect('shop:product_list')

def create_order(request):
    """Create an order from the current cart"""
    cart_items = cart.get_cart_items(request)

    # Check if cart is empty
    if not cart_items.exists():
        return None

    total_price = sum(item.get_total_price() for item in cart_items)

    # Check if total price is valid
    if total_price <= 0:
        return None

    # Check for applied coupon
    coupon = None
    discount_amount = 0

    if 'coupon_id' in request.session:
        try:
            coupon_id = request.session['coupon_id']
            coupon = Coupon.objects.get(id=coupon_id)

            # Validate coupon
            if coupon.is_valid():
                # Calculate discount
                discount_amount = coupon.get_discount_amount_for_total(total_price)
            else:
                # Coupon is no longer valid, remove from session
                del request.session['coupon_id']
                coupon = None
        except Coupon.DoesNotExist:
            # Invalid coupon in session, remove it
            del request.session['coupon_id']

    if request.user.is_authenticated:
        # Authenticated user order
        order = Order.objects.create(
            user=request.user,
            total_price=total_price,
            coupon=coupon,
            discount_amount=discount_amount,
            stripe_mode=stripe_service.mode  # Add this line

        )
    else:
        # Guest user order
        try:
            guest_user = GuestUser.objects.get(email=request.session['guest_email'])
            order = Order.objects.create(
                guest_user=guest_user,
                total_price=total_price,
                coupon=coupon,
                discount_amount=discount_amount,
                stripe_mode=stripe_service.mode  # Add this line

            )
        except (KeyError, GuestUser.DoesNotExist):
            # No guest user information, create order without user
            order = Order.objects.create(
                total_price=total_price,
                coupon=coupon,
                discount_amount=discount_amount,
                stripe_mode=stripe_service.mode  # Add this line
            )

    # Create order items
    for cart_item in cart_items:
        OrderItem.objects.create(
            order=order,
            product=cart_item.product,
            quantity=cart_item.quantity,
            color=cart_item.color,
            size=cart_item.size,
            price=cart_item.product.price
        )

    # Record coupon usage if applicable
    if coupon:
        guest_email = None
        if not request.user.is_authenticated and 'guest_email' in request.session:
            guest_email = request.session['guest_email']

        CouponUsage.objects.create(
            coupon=coupon,
            user=request.user if request.user.is_authenticated else None,
            order=order,
            guest_email=guest_email
        )

        # Update coupon usage count
        coupon.current_uses += 1
        coupon.save()

        # Remove coupon from session after using it
        if 'coupon_id' in request.session:
            del request.session['coupon_id']

    # Note: Cart is not cleared here, only after successful payment
    return order

def checkout(request):
    """Handle checkout process for both authenticated and guest users"""
    # Check if cart is empty
    cart_items = cart.get_cart_items(request)
    if not cart_items.exists():
        messages.error(request, "Your cart is empty. Please add items before checkout.")
        return redirect('shop:product_list')

    if request.user.is_authenticated:
        # Create order for authenticated user and go directly to payment
        return _handle_authenticated_checkout(request)

    # Handle guest checkout
    if request.method == 'GET':
        form = GuestCheckoutForm()
        return render(request, 'shop/checkout.html', {'form': form})
    elif request.method == 'POST':
        return _handle_guest_checkout_post(request)

    return redirect('shop:product_list')

def _handle_authenticated_checkout(request):
    """Helper function to handle checkout for authenticated users"""
    order = create_order(request)

    if not order:
        messages.error(request, "There was an issue creating your order. Please try again.")
        return redirect('shop:view_cart')

    return redirect('shop:payment', order_id=order.id)

def _handle_guest_checkout_post(request):
    """Helper function to handle POST requests for guest checkout"""
    form = GuestCheckoutForm(request.POST)
    if form.is_valid():
        # Create or get guest user
        email = form.cleaned_data['email']
        phone = form.cleaned_data['phone']
        guest_user, created = GuestUser.objects.get_or_create(
            email=email,
            defaults={'phone': phone}
        )

        # Store email in session
        request.session['guest_email'] = email

        # Create order
        order = create_order(request)

        if not order:
            messages.error(request, "There was an issue creating your order. Please try again.")
            return redirect('shop:view_cart')

        return redirect('shop:payment', order_id=order.id)

    # Form invalid
    return render(request, 'shop/checkout.html', {'form': form})

def payment(request, order_id):
    """Handle payment for an existing order"""
    order = get_object_or_404(Order, id=order_id)
    order.status = OrderStatus.PENDING
    order.payment_status = 'PENDING'
    order_items = order.items.all()

    # Check for valid order
    if not order_items.exists() or order.total_price <= 0:
        messages.error(request, "Cannot process an empty order.")
        return redirect('shop:product_list')

    # Log payment processing
    print(f"Processing payment for order #{order_id}, total: {order.total_price}")

    # Check Stripe configuration
    if not _check_stripe_config():
        messages.error(request, "Stripe API keys not configured properly.")
        return redirect('shop:view_cart')

    # Create line items
    line_items = _create_stripe_line_items(order_items)

    if not line_items:
        messages.error(request, "Cannot create payment with no items.")
        return redirect('shop:view_cart')

    # Create checkout session
    try:
        checkout_session = _create_stripe_checkout_session(request, order, line_items)
        checkout_session_id = checkout_session.id
    except Exception as e:
        messages.error(request, f"Payment processing error: {str(e)}")
        return redirect('shop:view_cart')

    display_data = prepare_item_display_data(order_items, is_cart=False)

    # Render payment page
    return render(request, 'shop/payment.html', {
        'order': order,
        'display_data': display_data,
        'checkout_session_id': checkout_session_id,
        'stripe_publishable_key': settings.STRIPE_PUBLISHABLE_KEY,
    })

def payment_success(request, order_id):
    """Handle successful payment"""
    order = get_object_or_404(Order, id=order_id)

    # Clear cart after successful payment
    cart.clear_cart(request)

    # Only update if not already processed by webhook
    if not order.webhook_processed:
        print(f"Updating order {order_id} via redirect (not webhook)")
        order.status = OrderStatus.PAID
        order.payment_status = 'PAID'
        order.save()
    else:
        print(f"Order {order_id} already processed by webhook")

    # Get order items for template
    order_items = order.items.all()
    display_data = prepare_item_display_data(order_items, is_cart=False)

    # Add discount information to the context
    context = {
        'order': order,
        'display_data': display_data,
        'has_discount': order.discount_amount > 0,
        'discount_amount': order.discount_amount,
        'total_after_discount': order.get_total_after_discount(),
    }

    return render(request, 'shop/payment_success.html', context)

def payment_cancel(request, order_id):
    """Handle cancelled payment"""
    order = get_object_or_404(Order, id=order_id)

    # Only update if not already processed by webhook
    if not order.webhook_processed:
        print(f"Updating order {order_id} to CANCELED via redirect (not webhook)")
        order.status = OrderStatus.CANCELED
        order.payment_status = 'FAILED'
        order.save()
    else:
        print(f"Order {order_id} already processed by webhook")

    messages.warning(request, "Your payment was cancelled.")
    return render(request, 'shop/payment_cancel.html', {'order': order})

@require_POST
def create_checkout_session(request):
    """API endpoint to create a Stripe checkout session directly from cart"""
    if not request.user.is_authenticated:
        return JsonResponse({'error': 'User must be authenticated'}, status=403)

    shipping_address = None
    # Parse shipping address data from request
    try:
        data = json.loads(request.body)
        shipping_data = data.get('shipping_address', {})
    except json.JSONDecodeError:
        shipping_data = {}

    # Validate shipping address
    shipping_form = ShippingAddressForm(shipping_data)
    if shipping_form.is_valid():
        shipping_address = shipping_form.save()

    # Create the order with shipping address
    order = create_order(request)
    if not order:
        return JsonResponse({'error': 'Could not create order from cart'}, status=400)

    # Attach shipping address to order
    order.shipping_address = shipping_address
    order.save()

    # Create line items and checkout session as before
    order_items = order.items.all()
    line_items = _create_stripe_line_items(order_items)

    try:
        checkout_session = _create_stripe_checkout_session(request, order, line_items)
        return JsonResponse({'id': checkout_session.id})
    except Exception as e:
        return JsonResponse({'error': str(e)}, status=400)

@require_POST
def update_cart_item(request):
    """Update a cart item quantity (increase/decrease)"""
    item_id = request.POST.get('item_id')
    action = request.POST.get('action')

    try:
        cart_item = cart.get_cart_item(request, item_id)

        if action == 'increase':
            # Increase quantity by 1
            cart_item.quantity += 1
            cart_item.save()
            messages.success(request, "Quantity increased.")

        elif action == 'decrease' and cart_item.quantity > 1:
            # Decrease quantity by 1
            cart_item.quantity -= 1
            cart_item.save()
            messages.success(request, "Quantity decreased.")

    except Exception as e:
        messages.error(request, f"Error updating cart: {str(e)}")

    return redirect('shop:view_cart')

@require_POST
def remove_from_cart(request):
    """Remove an item from cart by item_id"""
    item_id = request.POST.get('item_id')

    try:
        cart_item = cart.get_cart_item(request, item_id)
        cart_item.delete()
        messages.success(request, "Item removed from cart.")
    except Exception as e:
        messages.error(request, f"Error removing item: {str(e)}")

    return redirect('shop:view_cart')

def prepare_item_display_data(items, is_cart=True):
    """
    Transform cart items or order items into a standardized format for display

    Args:
        items: QuerySet of CartItem or OrderItem
        is_cart: True if items are CartItems, False if OrderItems

    Returns:
        Dictionary with standardized item data
    """
    prepared_items = []
    total_quantity = 0
    total_price = 0

    for item in items:
        if is_cart:
            # For CartItem
            item_data = {
                'id': item.id,
                'product_title': item.product.title,
                'product_description': item.product.description if item.product.description else None,
                'color_name': item.color.name if item.color else 'N/A',
                'color_hex': item.color.colorHex if item.color else '#FFFFFF',
                'secondary_color_hex': item.color.secondary_hex_color if item.color and item.color.secondary_hex_color else None,
                'size_name': item.size.name if item.size else 'N/A',
                'quantity': item.quantity,
                'total_price': item.get_total_price()
            }
            total_price += item.get_total_price()
        else:
            # For OrderItem
            item_data = {
                'id': item.id,
                'product_title': item.product.title,
                'product_description': item.product.description if item.product.description else None,
                'color_name': item.color.name if item.color else 'N/A',
                'color_hex': item.color.colorHex if item.color else '#FFFFFF',
                'secondary_color_hex': item.color.secondary_hex_color if item.color and item.color.secondary_hex_color else None,
                'size_name': item.size.name if item.size else 'N/A',
                'quantity': item.quantity,
                'total_price': item.get_total_price()
            }
            total_price += item.get_total_price()

        total_quantity += item.quantity
        prepared_items.append(item_data)

    return {
        'items': prepared_items,
        'total_quantity': total_quantity,
        'total_price': total_price
    }


def simulate_payment_success(request):
    """Debug function to simulate successful payment without Stripe"""
    # Create an order from the cart
    order = create_order(request)

    if not order:
        messages.error(request, "Could not create order from cart")
        return redirect('shop:view_cart')

    # Clear the cart
    cart.clear_cart(request)

    return redirect('shop:payment_success', order_id=order.id)

def simulate_payment_failure(request):
    """Debug function to simulate failed payment without Stripe"""
    # Create an order from the cart
    order = create_order(request)

    if not order:
        messages.error(request, "Could not create order from cart")
        return redirect('shop:view_cart')

    return redirect('shop:payment_cancel', order_id=order.id)


@require_POST
@csrf_exempt
def stripe_webhook(request):
    """Handle Stripe webhook events"""
    payload = request.body
    sig_header = request.META.get('HTTP_STRIPE_SIGNATURE')

    # Log the received webhook for debugging
    print(f"Webhook received: {sig_header}")

    if not sig_header:
        print("No signature header")
        return HttpResponse(status=400)

    try:
        # Use the service to verify the webhook
        event = stripe_service.verify_webhook_signature(payload, sig_header)

        # Log the event type and mode
        mode = "TEST" if stripe_service.is_test_mode else "LIVE"
        print(f"{mode} webhook event type: {event['type']}")

    except ValueError as e:
        print(f"Invalid payload: {str(e)}")
        return HttpResponse(status=400)
    except stripe.error.SignatureVerificationError as e:
        print(f"Invalid signature: {str(e)}")
        return HttpResponse(status=400)

    # Handle the event based on type
    event_type = event['type']

    if event_type == 'checkout.session.completed':
        handle_checkout_session_completed(event['data']['object'])
    elif event_type == 'payment_intent.succeeded':
        handle_payment_intent_succeeded(event['data']['object'])
    elif event_type == 'payment_intent.payment_failed':
        handle_payment_intent_failed(event['data']['object'])

    # Return success response
    return HttpResponse(status=200)

def handle_checkout_session_completed(session):
    """Handle completed checkout session webhook"""
    print(f"Processing checkout.session.completed for session {session.id}")

    # Get order from metadata
    order_id = session.get('metadata', {}).get('order_id')
    if not order_id:
        print(f"Warning: No order_id in metadata for session {session.id}")
        return

    try:
        order = Order.objects.get(id=order_id)

        # Update order status if not already processed
        if not order.webhook_processed:
            print(f"Updating order {order_id} to PAID via webhook")
            order.status = OrderStatus.PAID
            order.payment_status = 'PAID'
            order.webhook_processed = True
            order.save()

            # You could add additional processing here
            # - Send order confirmation email
            # - Update inventory
            # - Etc.
        else:
            print(f"Order {order_id} already processed by webhook")

    except Order.DoesNotExist:
        print(f"Error: Order {order_id} not found for session {session.id}")

def handle_payment_intent_succeeded(payment_intent):
    """Handle successful payment intent webhook"""
    print(f"Processing payment_intent.succeeded for intent {payment_intent.id}")

    # If you're using payment intents directly, handle them here
    # For Checkout Sessions, you'll likely rely on checkout.session.completed instead

def handle_payment_intent_failed(payment_intent):
    """Handle failed payment intent webhook"""
    print(f"Processing payment_intent.payment_failed for intent {payment_intent.id}")

    # Get order from metadata
    order_id = payment_intent.get('metadata', {}).get('order_id')
    if not order_id:
        print(f"No order_id in metadata for payment intent {payment_intent.id}")
        return

    try:
        order = Order.objects.get(id=order_id)

        # Update order status
        if not order.webhook_processed or order.payment_status != 'FAILED':
            print(f"Updating order {order_id} to FAILED via webhook")
            order.status = OrderStatus.CANCELED
            order.payment_status = 'FAILED'
            order.webhook_processed = True
            order.save()

    except Order.DoesNotExist:
        print(f"Error: Order {order_id} not found for payment intent {payment_intent.id}")

@require_POST
def apply_coupon(request):
    """Appliquer un code promo à la session actuelle"""
    code = request.POST.get('code')
    try:
        coupon = Coupon.objects.get(code__iexact=code, is_active=True)

        # Vérifier si le coupon est valide
        now = timezone.now()
        if now < coupon.valid_from or now > coupon.valid_to:
            return JsonResponse({'status': 'error', 'message': 'Ce code promo a expiré'})

        # Vérifier la limite d'utilisation
        if coupon.max_uses > 0 and coupon.current_uses >= coupon.max_uses:
            return JsonResponse({'status': 'error', 'message': 'Ce code promo a atteint sa limite d\'utilisation'})

        # Stocker le coupon dans la session
        request.session['coupon_id'] = coupon.id

        # Calculer la remise et le nouveau total
        cart_items = cart.get_cart_items(request)
        total_price = cart.get_cart_total(request)

        if not cart_items.exists() or total_price <= 0:
            return JsonResponse({'status': 'error', 'message': 'Votre panier est vide'})

        discount_amount = coupon.get_discount_amount_for_total(total_price)
        new_total = max(total_price - discount_amount, 0)

        # Formater le message en fonction du type de remise
        if coupon.discount_percent > 0:
            message = f"Remise de {coupon.discount_percent}% appliquée"
        else:
            message = f"Remise de {coupon.discount_amount} € appliquée"

        return JsonResponse({
            'status': 'success',
            'message': message,
            'discount': float(discount_amount),
            'new_total': float(new_total)
        })

    except Coupon.DoesNotExist:
        return JsonResponse({'status': 'error', 'message': 'Code promo invalide'})

@require_POST
def remove_coupon(request):
    """Remove the applied coupon from the session"""
    if 'coupon_id' in request.session:
        del request.session['coupon_id']
    return JsonResponse({'status': 'success', 'message': 'Coupon supprimé'})

def my_orders(request):
    """Display all orders for the logged-in user"""
    if not request.user.is_authenticated:
        messages.error(request, "Vous devez être connecté pour voir vos commandes.")
        return redirect('login')

    # Get all orders for the current user, ordered by date (newest first)
    orders = Order.objects.filter(user=request.user).order_by('-date_ordered')

    return render(request, 'shop/my_orders.html', {
        'orders': orders,
    })

def order_detail(request, order_id):
    """Display details for a specific order"""
    if not request.user.is_authenticated:
        messages.error(request, "Vous devez être connecté pour voir vos commandes.")
        return redirect('login')

    # Get the order, ensuring it belongs to the current user
    order = get_object_or_404(Order, id=order_id, user=request.user)

    # Get order items
    order_items = order.items.all()

    # Calculate total quantity
    total_quantity = sum(item.quantity for item in order_items)

    # Transform order items to match the display format expected by the template
    items_for_display = []
    for item in order_items:
        items_for_display.append({
            'id': item.id,
            'product_title': item.product.title,
            'product_description': item.product.description,
            'color_name': item.color.name if item.color else 'N/A',
            'color_hex': item.color.colorHex if item.color else '#FFFFFF',
            'secondary_color_hex': item.color.secondary_hex_color if item.color and item.color.secondary_hex_color else None,
            'size_name': item.size.name if item.size else 'N/A',
            'quantity': item.quantity,
            'total_price': item.get_total_price()
        })

    shipping_form = ShippingAddressForm(instance=order.shipping_address)

    return render(request, 'shop/order_detail.html', {
        'order': order,
        'order_items': items_for_display,
        'total_quantity': total_quantity,
        'shipping_form': shipping_form,
    })

@require_POST
def cancel_order(request, order_id):
    """Cancel an order and process refund if applicable"""
    if not request.user.is_authenticated:
        messages.error(request, "Vous devez être connecté pour annuler une commande.")
        return redirect('login')

    order = get_object_or_404(Order, id=order_id, user=request.user)

    # Check if order can be cancelled
    if not order.is_cancellable():
        messages.error(request, "Cette commande ne peut pas être annulée.")
        return redirect('shop:my_orders')

    print("Order cancellation initiated", order.status, order.stripe_payment_intent_id)
    # Process refund for paid orders
    if order.status == OrderStatus.PAID and order.stripe_payment_intent_id:
        try:
            # Attempt to refund through Stripe
            refund = stripe_service.create_refund(
                order.stripe_payment_intent_id,
                reason='requested_by_customer'
            )

            # Update order status
            order.status = OrderStatus.REFUNDED
            order.payment_status = 'REFUNDED'  # Or 'REFUNDED' if you add this status
            order.save()

            messages.success(request, "Votre commande a été annulée et remboursée avec succès.")
        except Exception as e:
            print(f"Refund error: {str(e)}")
            messages.error(request, "Un problème est survenu lors du remboursement. Veuillez contacter le support.")
    else:
        # For pending orders, just cancel without refund
        order.status = OrderStatus.CANCELED
        order.save()
        messages.success(request, "Votre commande a été annulée avec succès.")

    # Redirect back to the page they came from, or order list
    referring_page = request.META.get('HTTP_REFERER')
    if referring_page and 'order_detail' in referring_page:
        return redirect('shop:order_detail', order_id=order.id)
    else:
        return redirect('shop:my_orders')

@require_POST
def cancel_order_item(request, order_id, item_id):
    """Cancel a specific item in an order and process partial refund if applicable"""
    if not request.user.is_authenticated:
        messages.error(request, "Vous devez être connecté pour annuler un article.")
        return redirect('login')

    # Get the order and ensure it belongs to the user
    order = get_object_or_404(Order, id=order_id, user=request.user)

    # Check if order can be modified
    if not order.is_cancellable():
        messages.error(request, "Cette commande ne peut plus être modifiée.")
        return redirect('shop:order_detail', order_id=order.id)

    # Get the specific item
    try:
        order_item = order.items.get(id=item_id)
    except OrderItem.DoesNotExist:
        messages.error(request, "Article non trouvé.")
        return redirect('shop:order_detail', order_id=order.id)

    # Calculate refund amount for this item
    item_total = order_item.get_total_price()

    # If this is the last item, cancel the whole order
    remaining_items = order.items.exclude(id=item_id)
    if not remaining_items.exists():
        return cancel_order(request, order_id)

    # Process refund for paid orders
    if order.status == OrderStatus.PAID and order.stripe_payment_intent_id:
        try:
            # Calculate proportional discount if any
            if order.discount_amount > 0:
                discount_ratio = item_total / order.total_price
                item_discount = order.discount_amount * discount_ratio
                refund_amount = item_total - item_discount
            else:
                refund_amount = item_total

            # Create partial refund through Stripe
            refund = stripe_service.create_refund(
                order.stripe_payment_intent_id,
                amount=int(refund_amount * 100),  # Convert to cents
                reason='requested_by_customer'
            )

            # Update order totals
            order.total_price -= item_total
            if order.discount_amount > 0:
                order.discount_amount -= item_discount
            order.save()

            # Delete the item
            order_item.delete()

            messages.success(request, "L'article a été annulé et remboursé avec succès.")

        except Exception as e:
            print(f"Refund error: {str(e)}")
            messages.error(request, "Un problème est survenu lors du remboursement. Veuillez contacter le support.")
    else:
        # For pending orders, just remove the item and update totals
        order.total_price -= item_total
        order.save()
        order_item.delete()
        messages.success(request, "L'article a été annulé avec succès.")

    return redirect('shop:order_detail', order_id=order.id)

def checkout_view(request):
    if request.method == 'POST':
        guest_form = GuestCheckoutForm(request.POST)
        shipping_form = ShippingAddressForm(request.POST)

        if guest_form.is_valid() and shipping_form.is_valid():
            guest_user = guest_form.save()
            shipping_address = shipping_form.save()

            # Create order with shipping address
            order = Order.objects.create(
                guest_user=guest_user,
                shipping_address=shipping_address,
                # ... other order fields
            )

            return redirect('shop:order_detail', order_id=order.id)
    else:
        guest_form = GuestCheckoutForm()
        shipping_form = ShippingAddressForm()

    context = {
        'form': guest_form,
        'shipping_form': shipping_form,
    }
    return render(request, 'shop/checkout.html', context)

def update_shipping_address(request, order_id):
    order = get_object_or_404(Order, id=order_id)

    # Check if order can be edited
    if not order.shipping_address_can_be_edited():
        messages.error(request, "L'adresse ne peut plus être modifiée pour cette commande.")
        return redirect('shop:order_detail', order_id=order.id)

    if request.method == 'POST':
        form = ShippingAddressForm(request.POST, instance=order.shipping_address)
        print("Shipping address")
        if form.is_valid():
            shipping_address = form.save()
            print("Shipping address updated")
            if not order.shipping_address:
                order.shipping_address = shipping_address
                order.save()
            messages.success(request, "L'adresse de livraison a été mise à jour.")
            return redirect('shop:order_detail', order_id=order.id)
    else:
        form = ShippingAddressForm(instance=order.shipping_address)

    context = {
        'form': form,
        'order': order
    }
    return redirect('shop:order_detail', order_id=order.id)