# API Gateway Service

The core API gateway for LabFusion, built with Java Spring Boot following clean code principles.

## Purpose
- Central API endpoint for all frontend requests
- User authentication and authorization
- Dashboard and widget management
- Event and device state storage
- System metrics and health monitoring

## Technology Stack
- **Language**: Java 17
- **Framework**: Spring Boot 3.2.0
- **Port**: 8080
- **Database**: PostgreSQL
- **Message Bus**: Redis
- **Documentation**: OpenAPI/Swagger
- **Testing**: JUnit 5, Mockito
- **Quality**: SpotBugs, Checkstyle, PMD, JaCoCo

## Features
- JWT-based authentication framework
- RESTful API endpoints with comprehensive documentation
- WebSocket support for real-time updates
- Dashboard CRUD operations
- Event and device state management
- System health monitoring
- OpenAPI documentation generation
- Comprehensive error handling
- Clean code architecture with layered design

## Architecture
- **Controller Layer**: REST endpoints with validation
- **Service Layer**: Business logic and orchestration
- **Repository Layer**: Data access abstraction
- **Model Layer**: JPA entities and DTOs
- **Configuration**: Spring Boot auto-configuration

## API Endpoints
- `GET /actuator/health` - Health check
- `GET /swagger-ui.html` - API documentation
- `GET /api/dashboards` - Dashboard management
- `GET /api/system/metrics` - System metrics
- `POST /api/events` - Event publishing

## Development Status
✅ **Complete** - Core functionality implemented with clean code principles