class B2CShopifyPlatform:
    def __init__(self):
        self.features = {
            'checkout': 'single_step',
            'pricing': 'fixed_price',
            'payment_terms': 'immediate',
            'order_minimum': None,
            'bulk_ordering': False,
            'quote_requests': False
        }
    
    def process_order(self, order_data):
        # Simple checkout flow
        cart = self.get_cart(order_data.cart_id)
        payment = self.process_payment_immediately(order_data.payment_method)
        
        if payment.success:
            order = self.create_order(cart, payment)
            return order

class B2BShopifyPlatform:
    def __init__(self):
        self.features = {
            'checkout': 'multi_step_approval',
            'pricing': 'tiered_pricing',
            'payment_terms': 'net_30_60_90',
            'order_minimum': True,
            'bulk_ordering': True,
            'quote_requests': True,
            'company_accounts': True,
            'purchase_orders': True
        }
    
    def process_order(self, order_data):
        # Complex B2B workflow
        company = self.get_company_account(order_data.company_id)
        
        # Check credit limit
        if not self.check_credit_limit(company, order_data.total):
            return self.create_quote_request(order_data)
        
        # Approval workflow
        if order_data.total > company.approval_threshold:
            approval = self.create_approval_request(order_data)
            return {'status': 'pending_approval', 'approval_id': approval.id}
        
        # Create order with payment terms
        order = self.create_order_with_terms(
            order_data, 
            payment_terms=company.payment_terms
        )
        
        return order
    
    def implement_tiered_pricing(self, customer_id, product_id, quantity):
        customer_tier = self.get_customer_tier(customer_id)
        
        pricing_rules = {
            'bronze': {'discount': 0.05, 'min_quantity': 10},
            'silver': {'discount': 0.10, 'min_quantity': 5},
            'gold': {'discount': 0.15, 'min_quantity': 1},
            'platinum': {'discount': 0.20, 'min_quantity': 1}
        }
        
        rule = pricing_rules[customer_tier]
        base_price = self.get_base_price(product_id)
        
        if quantity >= rule['min_quantity']:
            return base_price * (1 - rule['discount'])
        
        return base_price

class SingleVendorPlatform:
    def process_order(self, order_data):
        # Single merchant receives entire order
        order = self.create_order(
            merchant_id=order_data.store_id,
            items=order_data.items,
            total=order_data.total
        )
        
        # Single fulfillment
        fulfillment = self.create_fulfillment(order)
        
        return order

class MarketplacePlatform:
    def process_order(self, order_data):
        # Split order across multiple vendors
        vendor_orders = self.split_order_by_vendor(order_data)
        
        orders = []
        for vendor_id, vendor_items in vendor_orders.items():
            # Create separate order for each vendor
            vendor_order = self.create_vendor_order(
                vendor_id=vendor_id,
                items=vendor_items,
                customer_id=order_data.customer_id
            )
            
            # Calculate vendor payout
            vendor_payout = self.calculate_vendor_payout(
                vendor_order.total,
                commission_rate=self.get_commission_rate(vendor_id)
            )
            
            orders.append({
                'order': vendor_order,
                'payout': vendor_payout
            })
        
        # Create master order for customer
        master_order = self.create_master_order(orders, order_data)
        
        return master_order
    
    def calculate_vendor_payout(self, order_total, commission_rate):
        platform_fee = order_total * commission_rate
        vendor_payout = order_total - platform_fee
        
        return {
            'order_total': order_total,
            'platform_fee': platform_fee,
            'vendor_payout': vendor_payout,
            'payout_schedule': 'weekly'
        }

class SubscriptionCommercePlatform:
    def __init__(self):
        self.subscription_engine = SubscriptionEngine()
        self.billing_scheduler = BillingScheduler()
    
    def create_subscription(self, subscription_data):
        subscription = {
            'customer_id': subscription_data.customer_id,
            'product_id': subscription_data.product_id,
            'frequency': subscription_data.frequency,  # weekly, monthly, quarterly
            'quantity': subscription_data.quantity,
            'start_date': datetime.now(),
            'next_billing_date': self.calculate_next_billing_date(
                subscription_data.frequency
            ),
            'status': 'active',
            'payment_method_id': subscription_data.payment_method_id
        }
        
        # Schedule recurring billing
        self.billing_scheduler.schedule_recurring_billing(subscription)
        
        return subscription
    
    def process_subscription_billing(self, subscription_id):
        subscription = self.get_subscription(subscription_id)
        
        try:
            # Attempt to charge customer
            payment = self.charge_subscription(
                subscription.customer_id,
                subscription.payment_method_id,
                subscription.amount
            )
            
            if payment.success:
                # Create order for this billing cycle
                order = self.create_subscription_order(subscription, payment)
                
                # Update next billing date
                subscription.next_billing_date = self.calculate_next_billing_date(
                    subscription.frequency
                )
                subscription.billing_attempts = 0
                
                return order
            else:
                # Handle failed payment
                self.handle_subscription_payment_failure(subscription, payment)
                
        except Exception as e:
            self.handle_subscription_error(subscription, e)
    
    def handle_subscription_payment_failure(self, subscription, payment):
        subscription.billing_attempts += 1
        
        if subscription.billing_attempts >= 3:
            # Cancel subscription after 3 failed attempts
            subscription.status = 'cancelled'
            subscription.cancellation_reason = 'payment_failure'
            
            # Notify customer
            self.send_subscription_cancellation_notice(subscription)
        else:
            # Retry in 3 days
            retry_date = datetime.now() + timedelta(days=3)
            self.billing_scheduler.schedule_retry(subscription, retry_date)
            
            # Notify customer of failed payment
            self.send_payment_failure_notice(subscription)

class EnterpriseMultiStorePlatform:
    def __init__(self):
        self.store_hierarchy = StoreHierarchy()
        self.centralized_inventory = CentralizedInventory()
        self.unified_analytics = UnifiedAnalytics()
    
    def create_store_group(self, organization_id, stores_config):
        # Create parent organization
        organization = {
            'id': organization_id,
            'name': stores_config.organization_name,
            'stores': [],
            'shared_resources': {
                'inventory': True,
                'customers': True,
                'analytics': True,
                'themes': True
            }
        }
        
        # Create child stores
        for store_config in stores_config.stores:
            store = self.create_child_store(
                organization_id,
                store_config,
                inherit_from_parent=True
            )
            organization['stores'].append(store)
        
        # Set up centralized inventory
        if organization['shared_resources']['inventory']:
            self.centralized_inventory.setup_shared_inventory(
                organization_id,
                organization['stores']
            )
        
        return organization
    
    def sync_inventory_across_stores(self, organization_id, product_id, quantity_change):
        stores = self.store_hierarchy.get_stores(organization_id)
        
        # Update centralized inventory
        self.centralized_inventory.update_quantity(
            organization_id, product_id, quantity_change
        )
        
        # Sync to all stores
        for store in stores:
            self.update_store_inventory(
                store.id, product_id, quantity_change
            )
    
    def generate_unified_analytics(self, organization_id):
        stores = self.store_hierarchy.get_stores(organization_id)
        
        # Aggregate metrics across all stores
        unified_metrics = {
            'total_revenue': 0,
            'total_orders': 0,
            'total_customers': 0,
            'store_breakdown': []
        }
        
        for store in stores:
            store_metrics = self.get_store_metrics(store.id)
            
            unified_metrics['total_revenue'] += store_metrics.revenue
            unified_metrics['total_orders'] += store_metrics.orders
            unified_metrics['total_customers'] += store_metrics.customers
            
            unified_metrics['store_breakdown'].append({
                'store_id': store.id,
                'store_name': store.name,
                'metrics': store_metrics
            })
        
        return unified_metrics

class WhiteLabelPlatform:
    def __init__(self):
        self.branding_service = BrandingService()
        self.custom_domain_service = CustomDomainService()
    
    def setup_white_label_store(self, partner_id, white_label_config):
        # Create fully branded experience
        white_label_store = {
            'partner_id': partner_id,
            'branding': {
                'logo': white_label_config.logo_url,
                'colors': white_label_config.color_scheme,
                'fonts': white_label_config.fonts,
                'email_templates': white_label_config.email_templates
            },
            'custom_domain': white_label_config.domain,
            'hide_platform_branding': True,
            'custom_admin_url': f"admin.{white_label_config.domain}",
            'api_subdomain': f"api.{white_label_config.domain}"
        }
        
        # Set up custom domain with SSL
        await self.custom_domain_service.configure_domain(
            white_label_config.domain,
            ssl_enabled=True
        )
        
        # Apply custom branding
        await self.branding_service.apply_branding(
            partner_id,
            white_label_store['branding']
        )
        
        return white_label_store
    
    def customize_checkout_experience(self, partner_id, checkout_config):
        # Fully customizable checkout
        custom_checkout = {
            'payment_methods': checkout_config.payment_methods,
            'shipping_options': checkout_config.shipping_options,
            'custom_fields': checkout_config.custom_fields,
            'branding': self.get_partner_branding(partner_id),
            'terms_and_conditions': checkout_config.terms_url,
            'privacy_policy': checkout_config.privacy_url
        }
        
        return custom_checkout

class InternationalPlatform:
    def __init__(self):
        self.currency_service = CurrencyService()
        self.localization_service = LocalizationService()
        self.tax_service = InternationalTaxService()
    
    def setup_international_store(self, store_id, markets):
        international_config = {
            'store_id': store_id,
            'markets': []
        }
        
        for market in markets:
            market_config = {
                'country': market.country,
                'currency': market.currency,
                'language': market.language,
                'domain': market.domain,  # e.g., store.co.uk, store.de
                'payment_methods': self.get_local_payment_methods(market.country),
                'shipping_zones': self.get_shipping_zones(market.country),
                'tax_rules': self.get_tax_rules(market.country)
            }
            
            international_config['markets'].append(market_config)
        
        return international_config
    
    def process_international_order(self, order_data):
        customer_country = order_data.shipping_address.country
        
        # Determine market
        market = self.get_market_for_country(
            order_data.store_id, customer_country
        )
        
        # Convert prices to local currency
        local_prices = self.currency_service.convert_prices(
            order_data.items,
            from_currency=order_data.store_currency,
            to_currency=market.currency
        )
        
        # Calculate local taxes
        taxes = self.tax_service.calculate_taxes(
            local_prices,
            customer_country,
            order_data.shipping_address
        )
        
        # Apply local payment methods
        payment_options = self.get_local_payment_methods(customer_country)
        
        return {
            'prices': local_prices,
            'taxes': taxes,
            'currency': market.currency,
            'payment_options': payment_options,
            'language': market.language
        }

class GDPRCompliantPlatform:
    def __init__(self):
        self.consent_manager = ConsentManager()
        self.data_portability = DataPortabilityService()
        self.right_to_erasure = RightToErasureService()
    
    def handle_customer_data(self, customer_id, data_operation):
        # Check consent before processing
        consent = self.consent_manager.get_consent(customer_id)
        
        if data_operation == 'marketing':
            if not consent.marketing_consent:
                raise ConsentRequiredError("Marketing consent not granted")
        
        elif data_operation == 'analytics':
            if not consent.analytics_consent:
                raise ConsentRequiredError("Analytics consent not granted")
        
        # Log data access for audit
        self.log_data_access(customer_id, data_operation)
    
    def export_customer_data(self, customer_id):
        # Right to data portability
        customer_data = {
            'personal_info': self.get_customer_info(customer_id),
            'orders': self.get_customer_orders(customer_id),
            'addresses': self.get_customer_addresses(customer_id),
            'preferences': self.get_customer_preferences(customer_id),
            'consent_history': self.consent_manager.get_consent_history(customer_id)
        }
        
        # Export in machine-readable format
        return self.data_portability.export_to_json(customer_data)
    
    def delete_customer_data(self, customer_id):
        # Right to be forgotten
        # Anonymize data while keeping financial records
        self.right_to_erasure.anonymize_customer(customer_id)
        
        # Keep order records for legal compliance
        self.retain_order_records_anonymized(customer_id)

class HeadlessCommercePlatform:
    def __init__(self):
        self.graphql_api = GraphQLAPI()
        self.rest_api = RESTfulAPI()
        self.webhook_service = WebhookService()
    
    def provide_api_first_experience(self):
        # No default frontend, pure API
        api_capabilities = {
            'graphql': {
                'endpoint': '/graphql',
                'features': [
                    'Flexible queries',
                    'Real-time subscriptions',
                    'Batch operations',
                    'Custom types'
                ]
            },
            'rest': {
                'endpoint': '/api',
                'features': [
                    'Full CRUD operations',
                    'Bulk operations',
                    'Webhooks',
                    'Rate limiting'
                ]
            },
            'webhooks': {
                'topics': [
                    'products/create', 'products/update',
                    'orders/create', 'orders/fulfilled',
                    'customers/create', 'inventory/update'
                ]
            }
        }
        
        return api_capabilities
    
    def enable_custom_frontend(self, store_id, frontend_config):
        # Support any frontend framework
        custom_frontend = {
            'framework': frontend_config.framework,  # React, Vue, Next.js
            'api_access': self.generate_api_credentials(store_id),
            'cdn_integration': self.setup_cdn(frontend_config),
            'build_hooks': self.setup_build_hooks(store_id, frontend_config)
        }
        
        return custom_frontend

class SocialCommercePlatform:
    def __init__(self):
        self.facebook_shop = FacebookShopIntegration()
        self.instagram_shop = InstagramShopIntegration()
        self.tiktok_shop = TikTokShopIntegration()
    
    def sync_products_to_social(self, store_id, platforms):
        for platform in platforms:
            products = self.get_store_products(store_id)
            
            if platform == 'facebook':
                self.facebook_shop.sync_catalog(store_id, products)
            elif platform == 'instagram':
                self.instagram_shop.sync_catalog(store_id, products)
            elif platform == 'tiktok':
                self.tiktok_shop.sync_catalog(store_id, products)
    
    def handle_social_order(self, social_order_data):
        # Order placed through social platform
        order = {
            'source': social_order_data.platform,
            'social_order_id': social_order_data.order_id,
            'customer': self.map_social_customer(social_order_data.customer),
            'items': social_order_data.items,
            'total': social_order_data.total
        }
        
        # Create order in Shopify
        shopify_order = self.create_order(order)
        
        # Sync order status back to social platform
        self.sync_order_status_to_social(
            social_order_data.platform,
            social_order_data.order_id,
            shopify_order.status
        )
        
        return shopify_order

class LargeScaleMerchantSupport:
    def handle_large_catalog(self, store_id, product_count):
        if product_count > 1_000_000:
            # Dedicated infrastructure
            return {
                'database': 'dedicated_shard',
                'search': 'dedicated_elasticsearch_cluster',
                'cache': 'dedicated_redis_cluster',
                'cdn': 'premium_tier',
                'support': 'enterprise_support'
            }

class BlackFridayScaling:
    def prepare_for_peak_event(self, event_date):
        # Pre-scale infrastructure
        scaling_plan = {
            'compute': 'scale_to_5x_capacity',
            'database': 'add_read_replicas',
            'cache': 'pre_warm_popular_products',
            'cdn': 'increase_cache_capacity',
            'monitoring': 'enhanced_alerting'
        }
        
        # Execute 1 week before event
        self.execute_scaling_plan(scaling_plan, event_date - timedelta(days=7))

class TenantIsolation:
    def enforce_isolation(self):
        return {
            'data': 'row_level_security',
            'compute': 'resource_quotas',
            'rate_limiting': 'per_tenant_limits',
            'circuit_breakers': 'tenant_specific',
            'monitoring': 'tenant_level_metrics'
        }

class TenantMigration:
    async def migrate_tenant(self, store_id, from_shard, to_shard):
        # Zero-downtime migration
        # 1. Replicate data to new shard
        await self.replicate_tenant_data(store_id, from_shard, to_shard)
        
        # 2. Enable dual-write mode
        await self.enable_dual_write(store_id, from_shard, to_shard)
        
        # 3. Verify data consistency
        await self.verify_data_consistency(store_id, from_shard, to_shard)
        
        # 4. Switch reads to new shard
        await self.switch_reads(store_id, to_shard)
        
        # 5. Disable writes to old shard
        await self.disable_old_shard_writes(store_id, from_shard)
        
        # 6. Clean up old data
        await self.cleanup_old_shard(store_id, from_shard)