bakery-ia

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

# 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

# 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

# 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

# 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

# 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

# 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

# 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

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

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

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)

Deploy the service: Add to your docker-compose and start
Configure SMTP: Set up email provider credentials
Test integration: Send test notifications via API
Event integration: Verify RabbitMQ event handling

Production Optimization

Email provider: Consider SendGrid/Mailgun for production
WhatsApp setup: Configure Twilio Business API
Template customization: Add tenant-specific templates
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. 🎯