🚗 Auto Lab Solutions - Backend System

A comprehensive automotive service management system built on AWS serverless architecture

📋 Table of Contents

• 🏗️ Architecture Overview
• ✨ Core Features
• 🔐 Authentication & Authorization
• 📊 Database Schema
• 🚀 API Endpoints
• 📧 Email System
• 🔄 Business Workflows
• 🏗️ Infrastructure Components
• 🔄 CI/CD Pipeline
• 📱 Real-time Communication
• 💰 Payment Processing
• 📊 Analytics & Reporting
• 🛡️ Security Features
• 🚀 Deployment
• 🧪 Testing & Validation

---

🏗️ Architecture Overview

Auto Lab Solutions is a serverless automotive service management system built entirely on AWS infrastructure. The system follows microservices architecture using AWS Lambda functions, DynamoDB for data persistence, and various AWS services for comprehensive functionality.

🏢 System Architecture

┌─────────────────┐    ┌──────────────────┐    ┌─────────────────┐
│   Frontend      │────│   API Gateway    │────│   Lambda        │
│   (React)       │    │   (REST API)     │    │   Functions     │
└─────────────────┘    └──────────────────┘    └─────────────────┘
                                │                        │
┌─────────────────┐    ┌──────────────────┐    ┌─────────────────┐
│   Auth0         │────│   WebSocket      │────│   DynamoDB      │
│   (Identity)    │    │   (Real-time)    │    │   (Database)    │
└─────────────────┘    └──────────────────┘    └─────────────────┘
                                │                        │
┌─────────────────┐    ┌──────────────────┐    ┌─────────────────┐
│   Stripe        │────│   SQS Queues     │────│   S3 + CDN      │
│   (Payments)    │    │   (Async Tasks)  │    │   (File Storage)│
└─────────────────┘    └──────────────────┘    └─────────────────┘
                                │
                       ┌──────────────────┐
                       │   SES            │
                       │   (Email)        │
                       └──────────────────┘

🎯 Key Architectural Principles

• 📈 Serverless-First: 100% serverless using AWS Lambda for zero server management
• 🔄 Event-Driven: Asynchronous processing using SQS queues for scalability
• 🏗️ Infrastructure as Code: Complete infrastructure defined in CloudFormation
• 🔒 Security by Design: JWT-based authentication with role-based access control
• 📊 Real-time Updates: WebSocket connections for live staff communication
• 💾 Data Consistency: ACID transactions with DynamoDB's native capabilities

---

✨ Core Features

🗓️ Appointment Management

• 📅 Schedule Management: Advanced scheduling system with conflict detection
• ⏰ Time Slot Management: Dynamic availability tracking and booking prevention
• 📋 Service Tracking: Complete appointment lifecycle from creation to completion
• 🔄 Status Transitions: Automated status updates (Scheduled → In Progress → Completed)
• 📱 Real-time Updates: Staff notifications for appointment changes

🛠️ Service & Order Management

• 📦 Service Catalog: Dynamic pricing for automotive services
• 🔧 Parts Management: Inventory tracking for automotive parts and components
• 💼 Order Processing: End-to-end order management with status tracking
• 📊 Service History: Complete customer service history and analytics

💳 Payment Processing

• 💰 Multi-Payment Support: Cash, bank transfer, and Stripe credit card payments
• 🧾 Invoice Generation: Automated PDF invoice creation and delivery
• 📧 Payment Confirmation: Email notifications for successful payments
• 🔄 Payment Status Tracking: Real-time payment status updates

👥 Customer Management

• 👤 User Profiles: Complete customer information management
• 🚗 Vehicle Records: Multi-vehicle support per customer
• 📞 Communication History: Complete message and inquiry tracking
• 📊 Service Analytics: Customer service patterns and history

💬 Communication System

• 📱 Real-time Messaging: WebSocket-based staff-customer communication
• 📧 Email Automation: Comprehensive email notification system
• 🔔 Multi-channel Notifications: Email, WebSocket, and optional Firebase push notifications
• 📝 Inquiry Management: Structured customer inquiry handling

📊 Analytics & Reporting

• 📈 Revenue Analytics: Comprehensive revenue tracking and analysis
• 👥 Customer Analytics: Customer behavior and service patterns
• 🔧 Service Analytics: Popular services and performance metrics
• 📅 Operational Analytics: Staff productivity and system usage

---

🔐 Authentication & Authorization

🔑 Auth0 Integration

The system uses Auth0 for authentication with custom JWT token processing:

// Auth0 Post-Login Action
exports.onExecutePostLogin = async (event, api) => {
  const userEmail = event.user.email;
  // Validates email verification
  // Calls backend API to get staff roles
  // Sets custom claims in JWT tokens
  api.idToken.setCustomClaim('is_staff', true);
  api.idToken.setCustomClaim('staff_roles', roles);
}

👥 Role-Based Access Control

• 🔐 ADMIN: Full system access, user management, analytics
• 👨‍💼 MANAGER: Business operations, staff oversight, reporting
• 🔧 MECHANIC: Service operations, appointment management
• 📞 CUSTOMER_SUPPORT: Customer communication, inquiry management
• 📋 STAFF: Basic staff operations and customer interaction

🛡️ API Security

• 🔐 JWT Token Validation: All protected endpoints require valid JWT
• 🔑 Custom Authorizers: Lambda authorizers for fine-grained access control
• 🔒 Role Validation: Function-level role checking for administrative operations
• 🚫 Request Filtering: Input validation and sanitization on all endpoints

---

📊 Database Schema

The system uses 15 DynamoDB tables for comprehensive data management:

🏢 Core Business Tables

Table	Purpose	Key Structure
👥 Staff	Staff member management	userEmail (PK)
👤 Users	Customer information	userId (PK)
🔗 Connections	WebSocket connections	connectionId (PK)
💬 Messages	Chat communication	messageId (PK)
⏰ UnavailableSlots	Scheduling management	date (PK)
📅 Appointments	Service appointments	appointmentId (PK)
🔧 ServicePrices	Service pricing	serviceId (PK)
📦 Orders	Product orders	orderId (PK)
🔩 ItemPrices	Parts pricing	itemId (PK)
❓ Inquiries	Customer inquiries	inquiryId (PK)
💳 Payments	Payment records	paymentId (PK)
🧾 Invoices	Invoice tracking	invoiceId (PK)

📧 Email Management Tables

Table	Purpose	Key Structure
🚫 EmailSuppression	Bounce/complaint tracking	email (PK)
📊 EmailAnalytics	Email performance metrics	analyticsId (PK)
📝 EmailMetadata	Email metadata storage	messageId (PK)

🔄 Data Relationships

Users (1:N) ────────► Appointments ────────► Payments ────────► Invoices
  │                      │                      
  │                      │                      
  └─── (1:N) Orders ─────┘                      
              │                                 
              │                                 
              └─── (N:1) ItemPrices            
                                               
ServicePrices (N:1) ─────► Appointments       
                                               
Staff (1:N) ─────────► Messages ────────► Users

Inquiries (N:1) ─────────► Users

---

🚀 API Endpoints

👤 User Management

GET    /users              # Get all users (staff only)
GET    /check-user         # Validate user existence
POST   /update-user-info   # Update user information

📅 Appointment Management

GET    /appointments       # Get appointments (filtered by role)
POST   /appointments       # Create new appointment
PATCH  /appointments/{id}  # Update appointment
GET    /unavailable-slots  # Get blocked time slots
POST   /unavailable-slots  # Update slot availability

📦 Order Management

GET    /orders            # Get orders (filtered by role)
POST   /orders            # Create new order
PATCH  /orders/{id}       # Update order
GET    /prices            # Get service/item pricing

💳 Payment Processing

POST   /create-payment-intent    # Stripe payment initialization
POST   /confirm-stripe-payment   # Stripe payment confirmation
POST   /confirm-cash-payment     # Manual payment confirmation
POST   /webhook-stripe-payment   # Stripe webhook handler

🧾 Invoice Management

GET    /invoices          # Get invoice list
POST   /invoices          # Manual invoice generation
PATCH  /invoices          # Cancel/reactivate invoice

💬 Communication

GET    /messages          # Get message history
POST   /send-message      # Send message
GET    /connections       # Get active connections (staff)
GET    /last-messages     # Get recent conversations

📧 Email Management

POST   /send-email        # Send custom email
GET    /emails            # Get email history
PATCH  /emails/{id}       # Update email status

❓ Inquiry Management

GET    /inquiries         # Get customer inquiries
POST   /inquiries         # Create new inquiry

📊 Analytics & Reporting

GET    /analytics         # Comprehensive business analytics
GET    /get-staff-roles   # Get staff role information (Auth0 integration)
POST   /users/staff       # Update staff roles (admin only)

🔧 System Operations

GET    /upload-url        # Get S3 presigned URLs
POST   /backup-restore    # System backup/restore
POST   /notify            # Send notifications

---

📧 Email System

The system features a comprehensive email notification system with multiple automation triggers:

📬 Email Types & Templates

🗓️ Appointment Emails

• 📅 Appointment Created: Welcome email with appointment details
• 🔄 Appointment Updated: Status change notifications
• ✅ Appointment Completed: Service completion confirmation

Appointment scheduled confirmation email

Appointment completion notification email

💰 Payment & Invoice Emails

• 💳 Payment Confirmed: Payment success with invoice attachment
• 📄 Invoice Generated: Automated invoice delivery
• 🚫 Payment Cancelled: Payment failure notifications

Payment confirmation with invoice attachment

Generated PDF invoice sample

📋 Service Emails

• 📊 Inspection Report Ready: Report completion notifications
• 👨‍💼 Admin to Customer: Custom staff communications

Service report ready notification

Custom admin-to-customer communication

🔧 Email Infrastructure

📨 AWS SES Integration

# Email sending with suppression checking
def send_email(to_email, subject, html_body, text_body=None, email_type=None):
    # Check bounce/complaint suppression
    if is_email_suppressed(to_email):
        return False
    
    # Send via SES
    response = ses_client.send_email(
        Source=NO_REPLY_EMAIL,
        Destination={'ToAddresses': [to_email]},
        Message={
            'Subject': {'Data': subject},
            'Body': {'Html': {'Data': html_body}}
        }
    )

🔄 Asynchronous Processing

• 📬 SQS Queue: Email notifications queued for async processing
• 🚫 Bounce Handling: Automatic suppression of bounced emails
• 📊 Analytics Tracking: Email open rates and delivery statistics
• 🔄 Retry Logic: Failed email retry with exponential backoff

🎨 Email Templates

• 🎨 HTML Templates: Rich HTML email designs
• 📱 Mobile Responsive: Optimized for all devices
• 🏷️ Dynamic Content: Personalized with customer/appointment data
• 📎 Attachment Support: PDF invoices and reports

---

🔄 Business Workflows

📅 Appointment Booking Workflow

graph TD
    A[Customer Books Appointment] --> B[Validate Time Slot]
    B --> C{Slot Available?}
    C -->|No| D[Return Error]
    C -->|Yes| F[Create Appointment Record]
    F --> G[Queue Confirmation Email]
    G --> H[Send WebSocket Notification]
    H --> I[Return Success]
    
    G --> J[SQS Email Queue]
    J --> K[Process Email]
    K --> L[Send Confirmation Email]

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💳 Payment Processing Workflow

graph TD
    A[Payment Initiated] --> B{Payment Method}
    B -->|Stripe| C[Create Payment Intent]
    B -->|Cash/Bank| D[Manual Payment Entry]
    
    C --> E[Customer Pays via Stripe]
    E --> F[Stripe Webhook]
    F --> G[Update Payment Status]
    
    D --> G
    G --> H[Queue Invoice Generation]
    H --> I[Generate PDF Invoice]
    I --> J[Upload to S3/CloudFront]
    J --> K[Send Invoice Email]
    K --> L[Update Records]

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🔧 Service Completion Workflow

graph TD
    A[Mechanic Updates Status] --> B[Status: In Progress]
    B --> C[Customer Notification]
    C --> D[Work Completed]
    D --> E[Status: Completed]
    E --> F[Customer Notification]

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💬 Real-time Communication Workflow

graph TD
    A[Staff Sends Message] --> B[Validate WebSocket Connection]
    B --> C[Store Message in DB]
    C --> D[Find Customer Connection]
    D --> E{Customer Online?}
    E -->|Yes| F[Send via WebSocket]
    F --> H[Mark as Delivered]

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---

🏗️ Infrastructure Components

☁️ AWS Services Used

🖥️ Compute & API

• ⚡ AWS Lambda: 40+ serverless functions for business logic
• 🌐 API Gateway: RESTful API with custom domain support
• 🔌 WebSocket API: Real-time bidirectional communication
• 🔐 Lambda Authorizers: JWT-based API security

💾 Data & Storage

• 🗄️ DynamoDB: 15 NoSQL tables with auto-scaling
• 🗃️ S3 Buckets: File storage for reports and invoices
• 📡 CloudFront CDN: Global content delivery network
• 🗂️ S3 Versioning: File version control and backup

📬 Messaging & Notifications

• 📮 SQS Queues: Async task processing (Email, Invoice, Firebase)
• 📧 Amazon SES: Transactional email delivery
• 🔔 Firebase Cloud Messaging: Push notifications (optional)
• 📊 CloudWatch Logs: Centralized logging and monitoring

🔒 Security & Networking

• 🛡️ IAM Roles: Least-privilege access control
• 🌐 Route53: DNS management and health checks
• 🔒 ACM Certificates: SSL/TLS encryption
• 🔐 Secrets Manager: Secure credential storage

🏗️ Infrastructure as Code

The entire infrastructure is defined in CloudFormation templates:

# Main Stack Architecture
Resources:
  # API Gateway with custom domains
  RestApi:
    Type: AWS::ApiGateway::RestApi
  
  # Lambda functions with proper IAM roles
  LambdaStack:
    Type: AWS::CloudFormation::Stack
    Properties:
      TemplateURL: lambda-functions.yaml
  
  # DynamoDB tables with backup enabled
  DatabaseStack:
    Type: AWS::CloudFormation::Stack
    Properties:
      TemplateURL: dynamodb-tables.yaml
  
  # S3 and CloudFront distribution
  StorageStack:
    Type: AWS::CloudFormation::Stack
    Properties:
      TemplateURL: s3-cloudfront.yaml

📦 Template Organization

• 🏗️ main-stack.yaml: Root infrastructure orchestration
• ⚡ lambda-functions.yaml: All Lambda function definitions
• 🌐 api-gateway.yaml: API Gateway and routing configuration
• 🗄️ dynamodb-tables.yaml: Database table definitions
• 🗃️ s3-cloudfront.yaml: Storage and CDN configuration
• 📬 notification-queue.yaml: SQS queue configurations
• 📧 ses-email-storage.yaml: Email infrastructure
• 🔙 backup-system.yaml: Automated backup system

---

🔄 CI/CD Pipeline

🚀 GitHub Actions Workflows

🔄 Development Deployment

# .github/workflows/deploy-dev.yml
name: Deploy Development
on:
  push:
    branches: [dev]

jobs:
  deploy:
    runs-on: ubuntu-latest
    environment: development
    steps:
      - name: Deploy Infrastructure
        run: ./deploy.sh development
      - name: Update Lambda Functions
        run: ./update-lambdas.sh --env dev --all
      - name: Validate Deployment
        run: ./validate-deployment.sh development

🏭 Production Deployment

# .github/workflows/deploy-prod.yml
name: Deploy Production
on:
  push:
    branches: [main]

jobs:
  deploy:
    runs-on: ubuntu-latest
    environment: production
    steps:
      - name: Validate Templates
        run: aws cloudformation validate-template
      - name: Deploy with Approval
        run: ./deploy.sh production

⚡ Lambda Updates

# .github/workflows/update-lambdas.yml
name: Update Lambda Functions
on:
  workflow_dispatch:
    inputs:
      environment:
        required: true
        type: choice
        options: [development, production]
      functions:
        required: false
        description: 'Comma-separated function names'

jobs:
  update:
    steps:
      - name: Update Functions
        run: ./update-lambdas.sh --env ${{ inputs.environment }}

🔧 Environment Management

🏗️ Environment Configuration

# config/environments.sh
get_env_config() {
    case $env in
        development)
            export ENVIRONMENT="development"
            export FRONTEND_DOMAIN="dev.autolabsolutions.com"
            export API_DOMAIN="api-dev.autolabsolutions.com"
            ;;
        production)
            export ENVIRONMENT="production"
            export FRONTEND_DOMAIN="autolabsolutions.com"
            export API_DOMAIN="api.autolabsolutions.com"
            ;;
    esac
}

🧪 Deployment Scripts

• 🚀 deploy.sh: Complete infrastructure deployment
• ⚡ update-lambdas.sh: Lambda function updates
• ✅ validate-deployment.sh: Post-deployment validation
• 🧪 validate-cicd.sh: CI/CD configuration validation

---

📱 Real-time Communication

🔌 WebSocket Architecture

The system implements comprehensive real-time communication using AWS WebSocket API:

🔗 Connection Management

# WebSocket connection handlers
def handle_connect(event, context):
    connection_id = event['requestContext']['connectionId']
    # Store connection in DynamoDB
    db.create_connection(connection_id)

def handle_disconnect(event, context):
    connection_id = event['requestContext']['connectionId']
    # Clean up connection and user associations
    db.delete_connection(connection_id)

👤 User Initialization

# User/Staff initialization on WebSocket
def handle_init(event, context):
    connection_id = event['requestContext']['connectionId']
    body = json.loads(event.get('body', '{}'))
    
    if body.get('userType') == 'staff':
        # Associate staff member with connection
        staff_email = body.get('staffEmail')
        db.associate_staff_connection(connection_id, staff_email)
    else:
        # Associate customer with connection
        user_id = body.get('userId')
        db.associate_user_connection(connection_id, user_id)

💬 Message Broadcasting

# Real-time message delivery
def send_message_to_connection(connection_id, message):
    try:
        apigateway_client.post_to_connection(
            ConnectionId=connection_id,
            Data=json.dumps(message)
        )
    except ClientError:
        # Connection is stale, remove from database
        db.delete_connection(connection_id)

🔄 Message Flow Architecture

graph TD
    A[Staff Sends Message] --> B[WebSocket API Gateway]
    B --> C[ws-send-message Lambda]
    C --> D[Validate & Store Message]
    D --> E[Find Customer Connection]
    E --> F{Customer Online?}
    F -->|Yes| G[Send via WebSocket]
    G --> H[Update Message Status]

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📊 Connection Monitoring

• 💓 Ping/Pong: Keep-alive connection monitoring
• 🧹 Cleanup: Automatic stale connection removal
• 📊 Analytics: Connection duration and usage statistics
• 🔔 Notifications: Real-time status updates for staff

---

💰 Payment Processing

💳 Stripe Integration

The system supports comprehensive payment processing through Stripe:

🔄 Payment Intent Flow

# Create payment intent
def create_payment_intent(amount, customer_email, metadata):
    intent = stripe.PaymentIntent.create(
        amount=int(amount * 100),  # Convert to cents
        currency='aud',
        customer_email=customer_email,
        metadata=metadata,
        automatic_payment_methods={'enabled': True}
    )
    return intent

🔗 Webhook Processing

# Stripe webhook handler
def handle_payment_succeeded(payment_intent):
    # Update payment record
    db.update_payment_status(payment_intent['id'], 'paid')
    
    # Update appointment/order
    reference_number = payment_intent['metadata']['reference_number']
    db.update_record_payment_status(reference_number, 'paid')
    
    # Queue invoice generation
    invoice_manager.queue_invoice_generation(record, record_type, payment_intent['id'])

💰 Multi-Payment Support

💵 Payment Methods

• 💳 Credit/Debit Cards: Stripe secure payment processing
• 💵 Cash Payments: Manual cash payment confirmation
• 🏦 Bank Transfers: Bank transfer payment tracking

🧾 Invoice Generation

# Automated invoice generation
def generate_invoice_pdf(record_data, record_type, payment_intent_id):
    # Create PDF using ReportLab
    pdf_content = create_invoice_pdf(record_data)
    
    # Upload to S3 with CloudFront distribution
    s3_key = f"invoices/{record_type}/{payment_intent_id}.pdf"
    s3_client.put_object(Bucket=REPORTS_BUCKET, Key=s3_key, Body=pdf_content)
    
    # Generate public URL
    invoice_url = f"https://{CLOUDFRONT_DOMAIN}/{s3_key}"
    
    # Send email with invoice attachment
    email_manager.send_payment_confirmation_email(
        customer_email, customer_name, record_data, invoice_url
    )

💼 Payment Analytics

• 📊 Revenue Tracking: Daily, weekly, monthly revenue analysis
• 💳 Payment Method Analytics: Popular payment methods
• 📈 Conversion Rates: Payment success/failure analysis
• 🔄 Transaction History: Complete payment audit trail

---

📊 Analytics & Reporting

📈 Comprehensive Business Intelligence

The system provides detailed analytics across all business operations:

💰 Revenue Analytics

# Revenue analysis with time-based filtering
def get_revenue_analytics(start_date, end_date):
    return {
        'total_revenue': calculate_total_revenue(start_date, end_date),
        'revenue_by_service': get_service_revenue_breakdown(),
        'revenue_by_payment_method': get_payment_method_breakdown(),
        'monthly_trends': get_monthly_revenue_trends(),
        'daily_averages': get_daily_revenue_averages()
    }

👥 Customer Analytics

• 👤 Customer Acquisition: New customer registration trends
• 🔄 Retention Rates: Customer return frequency analysis
• 💰 Customer Lifetime Value: Revenue per customer analysis
• 🚗 Vehicle Analytics: Popular vehicle makes and models
• 📅 Booking Patterns: Preferred appointment times and days

🔧 Service Analytics

def get_service_analytics():
    return {
        'popular_services': get_most_requested_services(),
        'service_completion_rates': get_completion_rates(),
        'average_service_duration': get_service_durations(),
        'service_revenue_contribution': get_service_revenue_breakdown()
    }

📊 Operational Analytics

• ⏱️ Response Times: Average API response times
• 📧 Email Performance: Delivery rates and open rates
• 💬 Communication Metrics: Message volume and response times
• 🔄 System Usage: Feature utilization and user behavior

📋 Reporting Features

📊 Dashboard Metrics

• 🎯 Quick Metrics: Last 30 days performance summary
• 📈 Trend Analysis: Growth trends and patterns
• 🎯 KPI Monitoring: Key performance indicators
• 🔔 Alert System: Threshold-based business alerts

---

🛡️ Security Features

🔐 Authentication Security

🔑 JWT Token Management

• 🔒 Token Validation: Comprehensive JWT signature verification using Auth0 JWKS
• ⏰ Token Expiry: Automatic token expiration handled by JWT built-in mechanism
• � Token Claims: Custom claims for staff roles and authentication status

👥 Role-Based Access Control

# Staff authorization with role checking
def validate_staff_authentication(event, required_roles=None):
    # Extract JWT token from Authorization header
    auth_header = event['headers'].get('authorization', '')
    token = extract_jwt_token(auth_header)
    
    # Validate token and extract claims
    claims = validate_jwt_token(token)
    staff_roles = claims.get('staff_roles', [])
    
    # Check required roles
    if required_roles and not any(role in staff_roles for role in required_roles):
        raise UnauthorizedError("Insufficient permissions")
    
    return {
        'staff_user_email': claims['email'],
        'staff_roles': staff_roles,
        'authenticated': True
    }

🛡️ Data Protection

🔒 Encryption

• 🔐 Data at Rest: DynamoDB encryption enabled
• 🔒 Data in Transit: HTTPS/TLS for all communications
• 🔑 S3 Encryption: Server-side encryption for file storage
• 🗝️ Secrets Management: AWS Secrets Manager for sensitive data

🔍 Input Validation

# Comprehensive input validation
class DataValidator:
    @staticmethod
    def validate_email(email, field_name="email"):
        email_pattern = r'^[a-zA-Z0-9._%+-]+@[a-zA-Z0-9.-]+\.[a-zA-Z]{2,}$'
        if not re.match(email_pattern, email):
            raise ValidationError(f"{field_name} must be a valid email address")
        return True
    
    @staticmethod
    def validate_phone_number(phone, field_name="phone"):
        clean_phone = re.sub(r'[\s\-\(\)]', '', phone)
        phone_pattern = r'^(\+\d{1,3})?\d{7,15}$'
        if not re.match(phone_pattern, clean_phone):
            raise ValidationError(f"{field_name} must be a valid phone number")
        return True

🚫 Email Security

📧 Bounce & Complaint Handling

# Email suppression management
def handle_ses_bounce(event):
    bounce_data = json.loads(event['Records'][0]['Sns']['Message'])
    
    for recipient in bounce_data['bounce']['bouncedRecipients']:
        email_address = recipient['emailAddress']
        bounce_type = bounce_data['bounce']['bounceType']
        
        # Add to suppression list for permanent bounces
        if bounce_type == 'Permanent':
            add_to_suppression_list(email_address, 'bounce')

🔒 API Security

• 🔑 API Key Validation: Shared secret for internal API calls
• 🛡️ CORS Configuration: Proper cross-origin resource sharing
• ⚡ Rate Limiting: Request throttling and abuse prevention

---

🚀 Deployment

📋 Prerequisites

🛠️ Required Tools

# AWS CLI configuration
aws configure set region ap-southeast-2
aws configure set output json

# Required software
- AWS CLI (latest)
- Python 3.13+
- Node.js 18+
- Git

🔑 Environment Variables

# Required secrets (set in GitHub Environments)
export STRIPE_SECRET_KEY="sk_..."
export STRIPE_WEBHOOK_SECRET="whsec_..."
export AUTH0_DOMAIN="your-domain.auth0.com"
export AWS_ACCOUNT_ID="123456789012"

# Optional Firebase configuration
export FIREBASE_PROJECT_ID="your-project-id"
export FIREBASE_SERVICE_ACCOUNT_KEY="base64-encoded-key"

🚀 Deployment Process

1️⃣ Infrastructure Deployment

# Clone repository
git clone https://github.com/Auto-Lab-Solutions/Web-Backend.git
cd Web-Backend

# Make scripts executable
chmod +x *.sh

# Deploy to development
./deploy.sh development

# Deploy to production (requires approval)
./deploy.sh production --skip-confirmation

2️⃣ Lambda Function Updates

# Update all Lambda functions
./update-lambdas.sh --env development --all

# Update specific functions
./update-lambdas.sh --env production api-get-appointments api-create-appointment

3️⃣ Post-Deployment Validation

# Validate deployment health
./validate-deployment.sh development

# Check SES email configuration
./check-ses-status.sh development

# Run comprehensive system validation
./validate-cicd.sh

🏗️ Environment Configuration

🔧 Development Environment

# Development configuration
ENVIRONMENT="development"
FRONTEND_DOMAIN="dev.autolabsolutions.com"
API_DOMAIN="api-dev.autolabsolutions.com"
REPORTS_DOMAIN="reports-dev.autolabsolutions.com"
ENABLE_BACKUP_SYSTEM="false"  # Simplified for development

🏭 Production Environment

# Production configuration
ENVIRONMENT="production"
FRONTEND_DOMAIN="autolabsolutions.com"
API_DOMAIN="api.autolabsolutions.com"
REPORTS_DOMAIN="reports.autolabsolutions.com"
ENABLE_BACKUP_SYSTEM="true"   # Full backup enabled

🔧 Maintenance Scripts

# Database backup and cleanup
./backup-restore.sh backup --env production

# Route53 DNS cleanup
./cleanup-route53-records.sh

# System status monitoring
./dev-tools.sh --env production status

# Validate full deployment
./validate-deployment.sh production

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🧪 Testing & Validation

✅ Automated Testing

🔍 Pre-deployment Validation

# Validate CloudFormation templates
aws cloudformation validate-template --template-body file://infrastructure/main-stack.yaml

# Python syntax validation
find lambda -name "*.py" -exec python -m py_compile {} \;

# Environment configuration validation
./validate-cicd.sh

🧪 Integration Testing

# API endpoint testing
./dev-tools.sh --env development test api-get-prices
./dev-tools.sh --env development test api-get-appointments

# Email system testing
./validate-ses.sh development

# System status check
./dev-tools.sh --env development status

📊 Health Monitoring

🔍 System Validation

# Check deployment status - all resources
./dev-tools.sh --env production status

# Validate deployment completeness
./validate-deployment.sh production

# Check SES email configuration
./check-ses-status.sh production

# Validate CI/CD configuration
./validate-cicd.sh

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🎯 Key Success Metrics

📊 System Performance

• ⚡ 99.9% Uptime: High availability through serverless architecture
• 🚀 <200ms Response Time: Fast API response times
• 📈 Auto-scaling: Handles traffic spikes automatically
• 💰 Cost Optimization: Pay-per-use serverless model

👥 User Experience

• 📱 Real-time Updates: Instant staff-customer communication
• 📧 Automated Notifications: Comprehensive email automation
• 💳 Seamless Payments: Multiple payment option support
• 📊 Business Intelligence: Comprehensive analytics and reporting

🔒 Security & Reliability

• 🛡️ Enterprise Security: Multi-layer security implementation
• 🔙 Automated Backups: Regular data backup and recovery
• 📧 Email Deliverability: High email delivery success rates
• 🔄 Data Consistency: ACID transaction support

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🤝 Contributing

📋 Development Workflow

1. 🔄 Fork & Clone: Fork repository and clone locally
2. 🌿 Branch: Create feature branch from dev
3. ✅ Test: Run validation scripts before committing
4. 📤 Pull Request: Submit PR to dev branch
5. 🔍 Review: Code review and automated testing
6. 🚀 Deploy: Automatic deployment to development environment

📏 Code Standards

• 🐍 Python: Follow PEP 8 style guidelines
• 📝 Documentation: Comprehensive docstrings and comments
• 🧪 Testing: Unit tests for business logic functions
• 🔒 Security: Input validation and error handling

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📄 License

This project is open source and available under the MIT License.

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