add coupon in shop

shop/admin.py

@@ -1,5 +1,5 @@
 from django.contrib import admin
-from .models import Product, Color, Size, Order, OrderItem, GuestUser
+from .models import Product, Color, Size, Order, OrderItem, GuestUser, Coupon, CouponUsage
 from django.utils.html import format_html
 
 @admin.register(Product)
@@ -53,3 +53,33 @@ class GuestUserOrderInline(admin.TabularInline):
 class GuestUserAdmin(admin.ModelAdmin):
     list_display = ('email', 'phone')
     inlines = [GuestUserOrderInline]
+
+@admin.register(Coupon)
+class CouponAdmin(admin.ModelAdmin):
+    list_display = ('code', 'discount_amount', 'discount_percent', 'is_active',
+                   'valid_from', 'valid_to', 'current_uses', 'max_uses')
+    list_filter = ('is_active', 'valid_from', 'valid_to')
+    search_fields = ('code', 'description')
+    readonly_fields = ('current_uses', 'created_at', 'stripe_coupon_id')
+    fieldsets = (
+        ('Basic Information', {
+            'fields': ('code', 'description', 'is_active')
+        }),
+        ('Discount', {
+            'fields': ('discount_amount', 'discount_percent')
+        }),
+        ('Validity', {
+            'fields': ('valid_from', 'valid_to', 'max_uses', 'current_uses')
+        }),
+        ('Stripe Information', {
+            'fields': ('stripe_coupon_id',),
+            'classes': ('collapse',)
+        }),
+    )
+
+@admin.register(CouponUsage)
+class CouponUsageAdmin(admin.ModelAdmin):
+    list_display = ('coupon', 'user', 'guest_email', 'order', 'used_at')
+    list_filter = ('used_at',)
+    search_fields = ('coupon__code', 'user__username', 'user__email', 'guest_email')
+    readonly_fields = ('used_at',)

shop/forms.py

@@ -1,5 +1,9 @@
 from django import forms
+from .models import Coupon
 
 class GuestCheckoutForm(forms.Form):
     email = forms.EmailField(required=True)
     phone = forms.CharField(max_length=20, required=True, label="Téléphone portable")
+
+class CouponApplyForm(forms.Form):
+    code = forms.CharField(max_length=50)

shop/migrations/0024_coupon_order_discount_amount_order_coupon_and_more.py

@@ -0,0 +1,54 @@
+# Generated by Django 5.1 on 2025-03-27 14:34
+
+import django.db.models.deletion
+from django.conf import settings
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('shop', '0023_alter_color_options_color_ordering'),
+        migrations.swappable_dependency(settings.AUTH_USER_MODEL),
+    ]
+
+    operations = [
+        migrations.CreateModel(
+            name='Coupon',
+            fields=[
+                ('id', models.BigAutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
+                ('code', models.CharField(max_length=50, unique=True)),
+                ('description', models.CharField(blank=True, max_length=255)),
+                ('discount_amount', models.DecimalField(decimal_places=2, default=0, max_digits=10)),
+                ('discount_percent', models.DecimalField(decimal_places=2, default=0, max_digits=5)),
+                ('is_active', models.BooleanField(default=True)),
+                ('valid_from', models.DateTimeField()),
+                ('valid_to', models.DateTimeField()),
+                ('max_uses', models.IntegerField(default=0)),
+                ('current_uses', models.IntegerField(default=0)),
+                ('created_at', models.DateTimeField(auto_now_add=True)),
+                ('stripe_coupon_id', models.CharField(blank=True, max_length=100, null=True)),
+            ],
+        ),
+        migrations.AddField(
+            model_name='order',
+            name='discount_amount',
+            field=models.DecimalField(decimal_places=2, default=0.0, max_digits=10),
+        ),
+        migrations.AddField(
+            model_name='order',
+            name='coupon',
+            field=models.ForeignKey(blank=True, null=True, on_delete=django.db.models.deletion.SET_NULL, to='shop.coupon'),
+        ),
+        migrations.CreateModel(
+            name='CouponUsage',
+            fields=[
+                ('id', models.BigAutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
+                ('guest_email', models.EmailField(blank=True, max_length=254, null=True)),
+                ('used_at', models.DateTimeField(auto_now_add=True)),
+                ('coupon', models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, related_name='usages', to='shop.coupon')),
+                ('order', models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, related_name='coupon_usages', to='shop.order')),
+                ('user', models.ForeignKey(blank=True, null=True, on_delete=django.db.models.deletion.CASCADE, to=settings.AUTH_USER_MODEL)),
+            ],
+        ),
+    ]

shop/models.py

@@ -76,6 +76,38 @@ class GuestUser(models.Model):
     def __str__(self):
         return f"{self.email}"
 
+class Coupon(models.Model):
+    code = models.CharField(max_length=50, unique=True)
+    description = models.CharField(max_length=255, blank=True)
+    discount_amount = models.DecimalField(max_digits=10, decimal_places=2, default=0)
+    discount_percent = models.DecimalField(max_digits=5, decimal_places=2, default=0)
+    is_active = models.BooleanField(default=True)
+    valid_from = models.DateTimeField()
+    valid_to = models.DateTimeField()
+    max_uses = models.IntegerField(default=0)  # 0 for unlimited
+    current_uses = models.IntegerField(default=0)
+    created_at = models.DateTimeField(auto_now_add=True)
+    stripe_coupon_id = models.CharField(max_length=100, blank=True, null=True)
+
+    def __str__(self):
+        return self.code
+
+    def is_valid(self):
+        from django.utils import timezone
+        now = timezone.now()
+        if not self.is_active:
+            return False
+        if now < self.valid_from or now > self.valid_to:
+            return False
+        if self.max_uses > 0 and self.current_uses >= self.max_uses:
+            return False
+        return True
+
+    def get_discount_amount_for_total(self, total_price):
+        """Calculate the discount amount for a given total price"""
+        if self.discount_percent > 0:
+            return (self.discount_percent / 100) * total_price
+        return self.discount_amount
 
 class Order(models.Model):
     user = models.ForeignKey(settings.AUTH_USER_MODEL, on_delete=models.CASCADE, null=True, blank=True)
@@ -95,10 +127,15 @@ class Order(models.Model):
         ('test', 'Test Mode'),
         ('live', 'Live Mode'),
     ])
+    coupon = models.ForeignKey(Coupon, on_delete=models.SET_NULL, null=True, blank=True)
+    discount_amount = models.DecimalField(max_digits=10, decimal_places=2, default=0.00)
 
     def __str__(self):
         return f"Order #{self.id} - {self.status}"
 
+    def get_total_after_discount(self):
+        return max(self.total_price - self.discount_amount, 0)
+
 class OrderItem(models.Model):
     order = models.ForeignKey(Order, on_delete=models.CASCADE, related_name='items')
     product = models.ForeignKey(Product, on_delete=models.CASCADE)
@@ -115,3 +152,14 @@ class OrderItem(models.Model):
 
     def get_total_price(self):
         return self.price * self.quantity
+
+class CouponUsage(models.Model):
+    coupon = models.ForeignKey(Coupon, on_delete=models.CASCADE, related_name='usages')
+    user = models.ForeignKey(settings.AUTH_USER_MODEL, on_delete=models.CASCADE, null=True, blank=True)
+    order = models.ForeignKey(Order, on_delete=models.CASCADE, related_name='coupon_usages')
+    guest_email = models.EmailField(blank=True, null=True)
+    used_at = models.DateTimeField(auto_now_add=True)
+
+    def __str__(self):
+        user_identifier = self.user.username if self.user else self.guest_email
+        return f"{self.coupon.code} - {user_identifier} - {self.used_at}"

shop/signals.py

@@ -66,6 +66,21 @@ def _get_order_details(instance):
         "UNPAID": "NON PAYÉE", "PAID": "PAYÉE", "FAILED": "ÉCHOUÉE"
     }
 
+    # Calculate discount information
+    has_coupon = instance.coupon is not None
+    coupon_info = ""
+    final_price = instance.total_price
+
+    if has_coupon:
+        coupon_code = instance.coupon.code
+        discount_amount = instance.discount_amount
+        final_price = instance.get_total_after_discount()
+
+        if instance.coupon.discount_percent > 0:
+            coupon_info = f"Code promo: {coupon_code} ({instance.coupon.discount_percent}%)"
+        else:
+            coupon_info = f"Code promo: {coupon_code} (€{discount_amount})"
+
     return {
         'order_id': instance.id,
         'status': instance.status,
@@ -73,6 +88,10 @@ def _get_order_details(instance):
         'payment_status': instance.payment_status,
         'payment_status_fr': payment_status_fr_map.get(instance.payment_status, instance.payment_status),
         'total_price': instance.total_price,
+        'has_coupon': has_coupon,
+        'coupon_info': coupon_info,
+        'discount_amount': instance.discount_amount if has_coupon else 0,
+        'final_price': final_price,
         'customer_info': customer_info,
         'customer_email': customer_email,
         'date_ordered': instance.date_ordered,
@@ -101,13 +120,22 @@ def _send_internal_notification(instance, action, order_details, items_list):
     """Send notification email to shop managers."""
     action_fr = _translate_action(action)
 
+    # Build price information with coupon details if applicable
+    price_info = f"Prix total: {order_details['total_price']}€"
+    if order_details['has_coupon']:
+        price_info = f"""
+Prix total: {order_details['total_price']}€
+{order_details['coupon_info']}
+Réduction: -{order_details['discount_amount']}€
+Montant payé: {order_details['final_price']}€"""
+
     subject = f"Commande #{order_details['order_id']} {action_fr}: {order_details['status_fr']}"
     message = f"""
 La commande #{order_details['order_id']} a été {action_fr.lower()}
 
 Statut: {order_details['status_fr']}
 Statut de paiement: {order_details['payment_status_fr']}
-Prix total: {order_details['total_price']}€
+{price_info}
 
 {order_details['customer_info']}
 
@@ -147,6 +175,10 @@ def _send_customer_notification(instance, order_details, items_list):
         date_formatted,
         order_details['status_fr'],
         order_details['total_price'],
+        order_details['has_coupon'],
+        order_details['coupon_info'],
+        order_details['discount_amount'],
+        order_details['final_price'],
         items_list,
         contact_email,
         shop_url
@@ -166,15 +198,24 @@ def _send_customer_notification(instance, order_details, items_list):
     )
 
 def _get_customer_email_content(status, payment_status, order_id, date, status_fr,
-                               total_price, items_list, contact_email, shop_url):
+                               total_price, has_coupon, coupon_info, discount_amount,
+                               final_price, items_list, contact_email, shop_url):
     """Get the appropriate customer email content based on order status."""
 
+    # Build price information with coupon details if applicable
+    price_info = f"Prix total: {total_price}€"
+    if has_coupon:
+        price_info = f"""Prix total: {total_price}€
+{coupon_info}
+Réduction: -{discount_amount}€
+Montant payé: {final_price}€"""
+
     # Payment confirmation email
     if status == OrderStatus.PAID and payment_status == "PAID":
         return {
             'subject': f"Confirmation de votre commande #{order_id} - Padel Club",
             'message': _build_payment_confirmation_email(order_id, date, status_fr,
-                                                       total_price, items_list,
+                                                       price_info, items_list,
                                                        contact_email, shop_url)
         }
 
@@ -189,14 +230,14 @@ def _get_customer_email_content(status, payment_status, order_id, date, status_f
         return {
             'subject': f"Mise à jour de votre commande #{order_id} - Padel Club",
             'message': _build_status_update_email(order_id, date, status_message, status_fr,
-                                                 total_price, items_list, contact_email)
+                                                 price_info, items_list, contact_email)
         }
 
     # Payment issue notification
     elif payment_status == "FAILED":
         return {
             'subject': f"Problème de paiement pour votre commande #{order_id} - Padel Club",
-            'message': _build_payment_issue_email(order_id, date, total_price,
+            'message': _build_payment_issue_email(order_id, date, price_info,
                                                  items_list, contact_email, shop_url)
         }
 
@@ -204,14 +245,14 @@ def _get_customer_email_content(status, payment_status, order_id, date, status_f
     elif payment_status == "UNPAID" and status != OrderStatus.PENDING:
         return {
             'subject': f"Rappel de paiement pour votre commande #{order_id} - Padel Club",
-            'message': _build_payment_reminder_email(order_id, date, total_price,
+            'message': _build_payment_reminder_email(order_id, date, price_info,
                                                     items_list, contact_email)
         }
 
     # No email needed
     return None
 
-def _build_payment_confirmation_email(order_id, date, status_fr, total_price, items_list, contact_email, shop_url):
+def _build_payment_confirmation_email(order_id, date, status_fr, price_info, items_list, contact_email, shop_url):
     """Build payment confirmation email message."""
     return f"""
 Bonjour,
@@ -221,7 +262,7 @@ Nous vous remercions pour votre commande sur PadelClub !
 Récapitulatif de votre commande #{order_id} du {date} :
 
 Statut: {status_fr}
-Prix total: {total_price}€
+{price_info}
 
 Détail de votre commande :
 {items_list}
@@ -239,7 +280,7 @@ Merci de votre confiance et à bientôt sur PadelClub !
 L'équipe Padel Club
     """
 
-def _build_status_update_email(order_id, date, status_message, status_fr, total_price, items_list, contact_email):
+def _build_status_update_email(order_id, date, status_message, status_fr, price_info, items_list, contact_email):
     """Build status update email message."""
     return f"""
 Bonjour,
@@ -249,7 +290,7 @@ Mise à jour concernant votre commande PadelClub #{order_id} du {date} :
 {status_message}
 
 Statut actuel: {status_fr}
-Prix total: {total_price}€
+{price_info}
 
 Détail de votre commande :
 {items_list}
@@ -262,7 +303,7 @@ Merci de votre confiance et à bientôt sur PadelClub !
 L'équipe Padel Club
     """
 
-def _build_payment_issue_email(order_id, date, total_price, items_list, contact_email, shop_url):
+def _build_payment_issue_email(order_id, date, price_info, items_list, contact_email, shop_url):
     """Build payment issue email message."""
     return f"""
 Bonjour,
@@ -271,7 +312,7 @@ Nous avons rencontré un problème lors du traitement du paiement de votre comma
 
 Détails de la commande :
 Date: {date}
-Prix total: {total_price}€
+{price_info}
 
 Articles:
 {items_list}
@@ -287,7 +328,7 @@ Merci de votre compréhension.
 L'équipe Padel Club
     """
 
-def _build_payment_reminder_email(order_id, date, total_price, items_list, contact_email):
+def _build_payment_reminder_email(order_id, date, price_info, items_list, contact_email):
     """Build payment reminder email message."""
     return f"""
 Bonjour,
@@ -295,7 +336,7 @@ Bonjour,
 Nous vous rappelons que votre commande Padel Club #{order_id} du {date} n'a pas encore été payée.
 
 Détails de la commande :
-Prix total: {total_price}€
+{price_info}
 
 Articles:
 {items_list}

shop/static/shop/css/shop.css

@@ -119,13 +119,28 @@
     height: 36px;
 }
 
+.coupon-section {
+    color: #707070;
+    font-size: 12px;
+    font-weight: 600;
+    text-decoration: none;
+    margin-top: 20px;
+}
+
 .confirm-nav-button {
     background-color: #90ee90;
+    color: #707070;
+    font-size: 12px;
+    font-weight: 600;
+    text-decoration: none;
 }
 
 .cancel-nav-button {
     background-color: #e84039;
     color: white;
+    font-size: 12px;
+    font-weight: 600;
+    text-decoration: none;
 }
 
 .remove-btn {

shop/stripe_utils.py

@@ -25,21 +25,31 @@ class StripeService:
         mode_str = "TEST" if self.is_test_mode else "LIVE"
         logger.debug(f"Initialized StripeService in {mode_str} mode")
 
-    def create_checkout_session(self, customer_email, line_items, success_url, cancel_url, metadata=None):
-        """Create a Stripe Checkout Session for one-time payments"""
-        if self.is_test_mode:
-            logger.info(f"Creating checkout session in TEST mode with metadata: {metadata}")
-
-        session = stripe.checkout.Session.create(
-            customer_email=customer_email,
-            payment_method_types=['card'],
-            line_items=line_items,
-            mode='payment',
-            success_url=success_url,
-            cancel_url=cancel_url,
-            metadata=metadata or {},
-        )
-        return session
+    def create_checkout_session(self, customer_email=None, line_items=None,
+                                success_url=None, cancel_url=None, metadata=None,
+                                discounts=None):
+        """Create a Stripe checkout session with the given parameters"""
+
+        # Initialize session parameters
+        session_params = {
+            'payment_method_types': ['card'],
+            'line_items': line_items,
+            'mode': 'payment',
+            'success_url': success_url,
+            'cancel_url': cancel_url,
+            'metadata': metadata or {},
+        }
+
+        # Add customer email if provided
+        if customer_email:
+            session_params['customer_email'] = customer_email
+
+        # Add discounts if provided
+        if discounts:
+            session_params['discounts'] = discounts
+
+        # Create and return the session
+        return stripe.checkout.Session.create(**session_params)
 
     def verify_webhook_signature(self, payload, signature):
         """Verify webhook signature using mode-appropriate secret"""

shop/templates/shop/cart.html

@@ -31,6 +31,32 @@
       {% if display_data.items %}
       {% include 'shop/partials/order_items_display.html' with items=display_data.items total_quantity=display_data.total_quantity total_price=display_data.total_price edit_mode=True %}
 
+      <div class="coupon-section">
+          <div>Avez-vous un code de réduction?</div>
+        <div class="coupon-form" style="display: flex;">
+          <input type="text" id="coupon-code" style="flex-grow: 1; margin-right: 10px; border-radius: 12px" placeholder="Entrez votre code">
+          <button id="apply-coupon" class="confirm-nav-button" style="min-width: 100px; border-radius: 12px; height: 40px;">Appliquer</button>
+          <button id="remove-coupon" class="cancel-nav-button" style="min-width: 100px; border-radius: 12px; height: 40px; display: none;">Supprimer</button>
+        </div>
+        <div id="coupon-message"></div>
+
+        <!-- Discount display -->
+        <div id="discount-info" style="margin-top: 10px; display: none;">
+          <div class="discount-row" style="display: flex; justify-content: space-between; margin-bottom: 5px;">
+            <span>Sous-total:</span>
+            <span id="subtotal-amount">€{{ display_data.total_price }}</span>
+          </div>
+          <div class="discount-row" style="display: flex; justify-content: space-between; margin-bottom: 5px;">
+            <span>Réduction:</span>
+            <span id="discount-amount" style="color: #e67e22;">-€0.00</span>
+          </div>
+          <div class="discount-row" style="display: flex; justify-content: space-between; font-weight: bold;">
+            <span>Total:</span>
+            <span id="final-total">€{{ display_data.total_price }}</span>
+          </div>
+        </div>
+      </div>
+
       <div class="cart-summary">
 
         {% if user.is_authenticated %}
@@ -79,6 +105,129 @@
 <script>
   document.addEventListener('DOMContentLoaded', function() {
     const checkoutButton = document.getElementById('checkout-button');
+    const applyButton = document.getElementById('apply-coupon');
+    const removeButton = document.getElementById('remove-coupon');
+    const codeInput = document.getElementById('coupon-code');
+    const messageElement = document.getElementById('coupon-message');
+    const discountInfo = document.getElementById('discount-info');
+    const subtotalAmount = document.getElementById('subtotal-amount');
+    const discountAmount = document.getElementById('discount-amount');
+    const finalTotal = document.getElementById('final-total');
+
+    // Initial values
+    const originalTotal = parseFloat('{{ display_data.total_price }}');
+
+    // Function to get CSRF token
+    function getCookie(name) {
+      let cookieValue = null;
+      if (document.cookie && document.cookie !== '') {
+        const cookies = document.cookie.split(';');
+        for (let i = 0; i < cookies.length; i++) {
+          const cookie = cookies[i].trim();
+          if (cookie.substring(0, name.length + 1) === (name + '=')) {
+            cookieValue = decodeURIComponent(cookie.substring(name.length + 1));
+            break;
+          }
+        }
+      }
+      return cookieValue;  // FIX: Proper closing of the function here
+    }
+
+    // Apply coupon
+    applyButton.addEventListener('click', function() {
+      const code = codeInput.value.trim();
+      if (!code) {
+        messageElement.textContent = 'Veuillez entrer un code';
+        messageElement.style.color = '#e74c3c';
+        return;
+      }
+
+      // Show loading state
+      applyButton.textContent = 'Chargement...';
+      applyButton.disabled = true;
+
+      // Send request to server
+      fetch('{% url "shop:apply_coupon" %}', {
+        method: 'POST',
+        headers: {
+          'Content-Type': 'application/x-www-form-urlencoded',
+          'X-CSRFToken': getCookie('csrftoken')
+        },
+        body: `code=${encodeURIComponent(code)}`
+      })
+      .then(response => response.json())
+      .then(data => {
+        // Reset button state
+        applyButton.textContent = 'Appliquer';
+        applyButton.disabled = false;
+
+        // Show message
+        messageElement.textContent = data.message;
+
+        if (data.status === 'success') {
+          // Update UI for success
+          messageElement.style.color = '#27ae60';
+          applyButton.style.display = 'none';
+          removeButton.style.display = 'block';
+          codeInput.disabled = true;
+
+          // Update price display
+          discountInfo.style.display = 'block';
+          discountAmount.textContent = `-€${data.discount.toFixed(2)}`;
+          finalTotal.textContent = `€${data.new_total.toFixed(2)}`;
+        } else {
+          // Update UI for error
+          messageElement.style.color = '#e74c3c';
+        }
+      })
+      .catch(error => {
+        console.error('Error:', error);
+        applyButton.textContent = 'Appliquer';
+        applyButton.disabled = false;
+        messageElement.textContent = 'Une erreur est survenue. Veuillez réessayer.';
+        messageElement.style.color = '#e74c3c';
+      });
+    });
+
+    // Remove coupon
+    removeButton.addEventListener('click', function() {
+      // Show loading state
+      removeButton.textContent = 'Chargement...';
+      removeButton.disabled = true;
+
+      // Send request to server
+      fetch('{% url "shop:remove_coupon" %}', {
+        method: 'POST',
+        headers: {
+          'Content-Type': 'application/x-www-form-urlencoded',
+          'X-CSRFToken': getCookie('csrftoken')
+        }
+      })
+      .then(response => response.json())
+      .then(data => {
+        // Reset button state
+        removeButton.textContent = 'Supprimer';
+        removeButton.disabled = false;
+
+        if (data.status === 'success') {
+          // Reset UI
+          messageElement.textContent = '';
+          codeInput.value = '';
+          codeInput.disabled = false;
+          applyButton.style.display = 'block';
+          removeButton.style.display = 'none';
+          discountInfo.style.display = 'none';
+          finalTotal.textContent = `€${originalTotal.toFixed(2)}`;
+        }
+      })
+      .catch(error => {
+        console.error('Error:', error);
+        removeButton.textContent = 'Supprimer';
+        removeButton.disabled = false;
+        messageElement.textContent = 'Une erreur est survenue. Veuillez réessayer.';
+        messageElement.style.color = '#e74c3c';
+      });
+    });
 
     checkoutButton.addEventListener('click', function() {
       // Show a loading indicator

shop/templates/shop/payment_success.html

@@ -29,6 +29,23 @@
             <h3>Détails de la commande</h3>
             {% include 'shop/partials/order_items_display.html' with items=display_data.items total_quantity=display_data.total_quantity total_price=display_data.total_price edit_mode=False %}
 
+            {% if has_discount %}
+            <div class="order-summary" style="margin-top: 20px;">
+              <div class="order-row" style="display: flex; justify-content: space-between;">
+                <span>Sous-total:</span>
+                <span>€{{ order.total_price }}</span>
+              </div>
+              <div class="order-row" style="display: flex; justify-content: space-between; color: #e67e22;">
+                <span>Réduction:</span>
+                <span>-€{{ discount_amount }}</span>
+              </div>
+              <div class="order-row" style="display: flex; justify-content: space-between; font-weight: bold;">
+                <span>Total payé:</span>
+                <span>€{{ total_after_discount }}</span>
+              </div>
+            </div>
+            {% endif %}
+
             <div class="cart-summary">
                 <a class="confirm-nav-button checkout-button" href="{% url 'shop:product_list' %}">Retour à la boutique</a>
             </div>

shop/urls.py

@@ -22,5 +22,7 @@ urlpatterns = [
     path('cart/remove-item/', views.remove_from_cart, name='remove_from_cart'),
     path('debug/simulate-payment-success/', views.simulate_payment_success, name='simulate_payment_success'),
     path('debug/simulate-payment-failure/', views.simulate_payment_failure, name='simulate_payment_failure'),
+    path('apply-coupon/', views.apply_coupon, name='apply_coupon'),
+    path('remove-coupon/', views.remove_coupon, name='remove_coupon'),
 
 ]

shop/views.py

@@ -1,7 +1,7 @@
 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
+from .models import Product, Order, OrderItem, GuestUser, OrderStatus, Coupon, CouponUsage
 from django.db.models import Sum
 from .forms import GuestCheckoutForm
 import stripe
@@ -12,6 +12,7 @@ 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 . import cart
 
@@ -64,16 +65,57 @@ def _create_stripe_checkout_session(request, order, line_items):
         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:
-        # Use the service to create the session
-        checkout_session = stripe_service.create_checkout_session(
-            customer_email=customer_email,
-            line_items=line_items,
-            success_url=success_url,
-            cancel_url=cancel_url,
-            metadata=metadata,
+            # 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()
@@ -172,11 +214,34 @@ def create_order(request):
     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
 
         )
@@ -187,6 +252,8 @@ def create_order(request):
             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
 
             )
@@ -194,6 +261,8 @@ def create_order(request):
             # 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
             )
 
@@ -208,6 +277,27 @@ def create_order(request):
             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
 
@@ -334,10 +424,16 @@ def payment_success(request, order_id):
     order_items = order.items.all()
     display_data = prepare_item_display_data(order_items, is_cart=False)
 
-    return render(request, 'shop/payment_success.html', {
+    # 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"""
@@ -604,3 +700,55 @@ def handle_payment_intent_failed(payment_intent):
 
     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'})