From d77cbbafb63126e08b9e32d296ad5b50effdc7a3 Mon Sep 17 00:00:00 2001
From: Urtzi Alfaro <urtzialfaro@MacBook-Pro-de-Urtzi.local>
Date: Mon, 21 Jul 2025 22:51:49 +0200
Subject: [PATCH] Add notification service readme

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 services/notification/README.md | 321 ++++++++++++++++++++++++++++++++
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+## 🎯 **Complete Notification Service Implementation**
+
+### **📁 File Structure Created**
+
+```
+services/notification/
+├── app/
+│   ├── main.py                     ✅ Complete FastAPI application
+│   ├── core/
+│   │   ├── config.py              ✅ Configuration settings
+│   │   └── database.py            ✅ Database initialization
+│   ├── models/
+│   │   ├── notifications.py       ✅ Core notification models
+│   │   └── templates.py           ✅ Template-specific models
+│   ├── schemas/
+│   │   └── notifications.py       ✅ Pydantic schemas
+│   ├── services/
+│   │   ├── notification_service.py ✅ Main business logic
+│   │   ├── email_service.py        ✅ Email delivery
+│   │   ├── whatsapp_service.py     ✅ WhatsApp delivery
+│   │   └── messaging.py           ✅ RabbitMQ integration
+│   └── api/
+│       └── notifications.py       ✅ Complete API routes
+├── requirements.txt               ✅ Python dependencies
+├── Dockerfile                     ✅ Container configuration
+└── .env.example                   ✅ Environment variables
+```
+
+### **🔧 Key Features Implemented**
+
+#### **1. Complete Business Logic**
+
+- ✅ **NotificationService**: Core orchestration of all notification operations
+- ✅ **Multi-channel support**: Email, WhatsApp, Push (extensible)
+- ✅ **Template processing**: Jinja2-based template rendering
+- ✅ **Bulk notifications**: Batch processing with rate limiting
+- ✅ **User preferences**: Granular notification controls
+- ✅ **Scheduling**: Delayed notification delivery
+
+#### **2. Email Service Integration**
+
+- ✅ **SMTP support**: Configurable email providers (Gmail, SendGrid, etc
+- ✅ **HTML + Text emails**: Rich email templates with fallbacks
+- ✅ **Bulk email processing**: Rate-limited batch sending
+- ✅ **Template system**: Pre-built Spanish templates for bakeries
+- ✅ **Health checks**: SMTP connection monitoring
+- ✅ **Attachment support**: File attachment capabilities
+
+#### **3. WhatsApp Service Integration**
+
+- ✅ **Twilio integration**: WhatsApp Business API support
+- ✅ **Spanish phone formatting**: Automatic +34 country code handling
+- ✅ **Template messages**: WhatsApp Business template support
+- ✅ **Bulk WhatsApp**: Rate-limited batch messaging
+- ✅ **Delivery status**: Webhook handling for delivery confirmations
+
+#### **4. Database Models & Schemas**
+
+- ✅ **Complete data model**: Notifications, templates, preferences, logs
+- ✅ **Multi-tenant support**: Tenant-scoped notifications
+- ✅ **Audit trail**: Detailed delivery attempt logging
+- ✅ **Template management**: System and custom templates
+- ✅ **User preferences**: Granular notification controls
+
+#### **5. API Integration with Gateway**
+
+- ✅ **Gateway authentication**: Uses shared auth decorators
+- ✅ **Tenant isolation**: Automatic tenant scoping
+- ✅ **Role-based access**: Admin/manager/user permissions
+- ✅ **Complete CRUD**: Full notification management API
+- ✅ **Webhook endpoints**: External delivery status handling
+
+#### **6. RabbitMQ Event Integration**
+
+- ✅ **Event consumers**: Listens for user registration, forecasts, training
+- ✅ **Event publishers**: Publishes notification status events
+- ✅ **Auto-notifications**: Triggers welcome emails, alerts, reports
+- ✅ **Error handling**: Robust message processing with retry logic
+
+#### **7. Spanish Bakery Templates**
+
+- ✅ **Welcome email**: Professional onboarding email
+- ✅ **Forecast alerts**: Demand variation notifications
+- ✅ **Weekly reports**: Performance summary emails
+- ✅ **Responsive HTML**: Mobile-optimized email designs
+- ✅ **Spanish localization**: All content in Spanish
+
+### **🚀 Integration with Your Architecture**
+
+#### **Seamless Gateway Integration**
+
+```python
+# Gateway already routes to notification service
+app.include_router(notification.router, prefix="/api/v1/notifications", tags=["notifications"])
+
+# Authentication handled by gateway middleware
+# Tenant isolation automatic
+# User context passed via headers
+```
+
+#### **Shared Library Usage**
+
+```python
+# Uses your existing shared components
+from shared.auth.decorators import get_current_user_dep, get_current_tenant_id_dep
+from shared.messaging.rabbitmq import RabbitMQClient
+from shared.monitoring.metrics import MetricsCollector
+from shared.database.base import DatabaseManager
+```
+
+#### **Event-Driven Architecture**
+
+```python
+# Automatic notifications triggered by:
+# - User registration → Welcome email
+# - Forecast alerts → Alert emails + WhatsApp
+# - Training completion → Status notifications
+# - Data imports → Import confirmations
+```
+
+### **📊 Production Features**
+
+#### **Health Monitoring**
+
+- ✅ **Database health checks**: Connection monitoring
+- ✅ **SMTP health checks**: Email service validation
+- ✅ **WhatsApp health checks**: API connectivity tests
+- ✅ **Prometheus metrics**: Delivery rates, response times
+- ✅ **Structured logging**: Comprehensive error tracking
+
+#### **Rate Limiting & Scaling**
+
+- ✅ **Email rate limits**: 1000/hour configurable
+- ✅ **WhatsApp rate limits**: 100/hour (Twilio limits)
+- ✅ **Batch processing**: Configurable batch sizes
+- ✅ **Retry logic**: Automatic retry with exponential backoff
+- ✅ **Queue management**: Background task processing
+
+#### **Security & Compliance**
+
+- ✅ **User consent**: Preference-based opt-in/out
+- ✅ **Tenant isolation**: Multi-tenant data separation
+- ✅ **GDPR compliance**: User data control
+- ✅ **Rate limiting**: DoS protection
+- ✅ **Input validation**: Pydantic schema validation
+
+### **🎯 Business-Specific Features**
+
+#### **Bakery Use Cases**
+
+```python
+# Forecast alerts when demand varies >20%
+# Daily production recommendations
+# Weekly performance reports
+# Stock shortage notifications
+# Weather impact alerts
+# Holiday/event notifications
+```
+
+#### **Spanish Localization**
+
+- ✅ **Spanish templates**: Native Spanish content
+- ✅ **Madrid timezone**: Europe/Madrid default
+- ✅ **Spanish phone format**: +34 prefix handling
+- ✅ **Local business hours**: Quiet hours support
+- ✅ **Cultural context**: Bakery-specific terminology
+
+### **🔄 How to Deploy**
+
+#### **1. Add to Docker Compose**
+
+```yaml
+# Already integrated in your docker-compose.yml
+notification-service:
+  build: ./services/notification
+  ports:
+    - "8006:8000"
+  environment:
+    - DATABASE_URL=postgresql+asyncpg://notification_user:notification_pass123@notification-db:5432/notification_db
+  depends_on:
+    - notification-db
+    - redis
+    - rabbitmq
+```
+
+#### **2. Environment Setup**
+
+```bash
+# Copy environment template
+cp services/notification/.env.example services/notification/.env
+
+# Configure email provider
+SMTP_USER=your-email@gmail.com
+SMTP_PASSWORD=your-app-password
+
+# Configure WhatsApp (optional)
+WHATSAPP_API_KEY=your-twilio-sid:your-twilio-token
+```
+
+#### **3. Start Service**
+
+```bash
+# Service starts automatically with
+docker-compose up -d
+
+# Check health
+curl http://localhost:8006/health
+
+# View API docs
+open http://localhost:8006/docs
+```
+
+### **📈 API Usage Examples**
+
+#### **Send Welcome Email**
+
+```python
+POST /api/v1/notifications/send
+{
+  "type": "email",
+  "recipient_email": "usuario@panaderia.com",
+  "template_id": "welcome_email",
+  "template_data": {
+    "user_name": "Juan Carlos",
+    "dashboard_url": "https://app.bakeryforecast.es/dashboard"
+  }
+}
+```
+
+#### **Send Forecast Alert**
+
+```python
+POST /api/v1/notifications/send
+{
+  "type": "email",
+  "template_id": "forecast_alert_email",
+  "template_data": {
+    "bakery_name": "Panadería San Miguel",
+    "product_name": "Pan integral",
+    "forecast_date": "2025-01-25",
+    "predicted_demand": 120,
+    "variation_percentage": 35,
+    "alert_message": "Aumento significativo esperado. Se recomienda incrementar producción."
+  },
+  "broadcast": true,
+  "priority": "high"
+}
+```
+
+#### **Update User Preferences**
+
+```python
+PATCH /api/v1/notifications/preferences
+{
+  "email_alerts": true,
+  "whatsapp_enabled": false,
+  "quiet_hours_start": "22:00",
+  "quiet_hours_end": "08:00",
+  "language": "es"
+}
+```
+
+### **🎉 Key Benefits**
+
+#### **✅ Production Ready**
+
+- Complete error handling and logging
+- Health checks and monitoring
+- Rate limiting and security
+- Multi-tenant architecture
+- Scalable event-driven design
+
+#### **✅ Business Focused**
+
+- Spanish bakery templates
+- Madrid timezone/localization
+- Forecast-specific notifications
+- Professional email designs
+- WhatsApp support for urgent alerts
+
+#### **✅ Developer Friendly**
+
+- Comprehensive API documentation
+- Type-safe Pydantic schemas
+- Async/await throughout
+- Structured logging
+- Easy testing and debugging
+
+#### **✅ Seamless Integration**
+
+- Uses your shared libraries
+- Integrates with gateway auth
+- Follows your architectural patterns
+- Maintains tenant isolation
+- Publishes events to RabbitMQ
+
+### **🚀 Next Steps**
+
+#### **Immediate (Week 2)**
+
+1. **Deploy the service**: Add to your docker-compose and start
+2. **Configure SMTP**: Set up email provider credentials
+3. **Test integration**: Send test notifications via API
+4. **Event integration**: Verify RabbitMQ event handling
+
+#### **Production Optimization**
+
+1. **Email provider**: Consider SendGrid/Mailgun for production
+2. **WhatsApp setup**: Configure Twilio Business API
+3. **Template customization**: Add tenant-specific templates
+4. **Analytics dashboard**: Add notification analytics to frontend
+
+### **💡 Advanced Features Ready for Extension**
+
+- ✅ **Push notifications**: Framework ready for mobile push
+- ✅ **SMS support**: Easy to add SMS providers
+- ✅ **A/B testing**: Template variant testing
+- ✅ **Scheduled campaigns**: Marketing email campaigns
+- ✅ **Analytics integration**: Detailed delivery analytics
+
+**This notification service is now a complete, production-ready microservice that fully integrates with your bakery forecasting platform! It handles all notification needs from welcome emails to urgent forecast alerts, with proper Spanish localization and bakery-specific templates.** 🎯
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