# DevBox Architecture Proposal: CLI + Microservices

## Overview

Transform DevBox from a monolithic CLI into a lightweight client that communicates with dedicated microservices for advanced features, providing better security, maintainability, and role-based access control.

## Current Problem

- **Security Risk**: All implementation exposed in downloadable CLI
- **Maintenance Burden**: Updates require CLI redistribution
- **No Access Control**: Anyone with CLI has access to all features
- **Scalability Issues**: CLI handles everything locally
- **Privacy Concerns**: Sensitive operations happen on client machines

## Proposed Solution

### Architecture Overview

```
┌─────────────────┐    ┌─────────────────┐    ┌─────────────────┐
│   DevBox CLI    │    │  DevBox API     │    │  Microservices  │
│   (Lightweight) │◄──►│   Gateway       │◄──►│   (Internal)    │
└─────────────────┘    └─────────────────┘    └─────────────────┘
        │                       │                       │
        │                       │                       │
        ▼                       ▼                       ▼
┌─────────────────┐    ┌─────────────────┐    ┌─────────────────┐
│  Local Setup    │    │ Authentication  │    │ Code Review     │
│  Basic Commands │    │ Authorization   │    │ CI/CD Pipeline  │
│  Docker Mgmt    │    │ Rate Limiting   │    │ AI Services     │
└─────────────────┘    └─────────────────┘    └─────────────────┘
```

## Component Breakdown

### 1. DevBox CLI (Lightweight Client)

**Responsibilities:**
- Basic local environment setup
- Docker container management
- Simple service start/stop/status
- API communication for advanced features
- Local configuration management

**Features:**
```bash
# Basic local operations (stay in CLI)
devbox init                    # Local environment setup
devbox start/stop/status       # Container management
devbox deinit                  # Cleanup

# Advanced features (delegate to microservices)
devbox review --component=chat # → Code Review Service
devbox package --component=chat # → CI/CD Service
devbox deploy --env=staging    # → Deployment Service
devbox ai --prompt="..."       # → AI Service
```

### 2. DevBox API Gateway

**Responsibilities:**
- Authentication & Authorization
- Rate limiting
- Request routing
- API versioning
- Logging & monitoring
- SSL termination

**Authentication Flow:**
```
1. CLI authenticates with API Gateway
2. Gateway validates credentials
3. Gateway checks permissions for requested feature
4. Gateway routes request to appropriate microservice
5. Microservice processes request and returns result
```

### 3. Microservices Architecture

#### A. Code Review Service
- **Purpose**: OpenAI-powered code reviews
- **Endpoints**: `/api/v1/review/analyze`, `/api/v1/review/reports`
- **Permissions**: `code_review:read`, `code_review:write`
- **Features**: 
  - File analysis
  - Report generation
  - Historical tracking
  - Team collaboration

#### B. CI/CD Pipeline Service
- **Purpose**: Build, test, and deployment automation
- **Endpoints**: `/api/v1/cicd/build`, `/api/v1/cicd/deploy`, `/api/v1/cicd/status`
- **Permissions**: `cicd:build`, `cicd:deploy`, `cicd:read`
- **Features**:
  - Docker image building
  - Integration testing
  - Deployment management
  - Pipeline orchestration

#### C. AI Services
- **Purpose**: AI-powered development assistance
- **Endpoints**: `/api/v1/ai/chat`, `/api/v1/ai/generate`, `/api/v1/ai/analyze`
- **Permissions**: `ai:chat`, `ai:generate`, `ai:analyze`
- **Features**:
  - Code generation
  - Documentation assistance
  - Bug analysis
  - Performance optimization

#### D. Authentication Service
- **Purpose**: User management and authentication
- **Endpoints**: `/api/v1/auth/login`, `/api/v1/auth/refresh`, `/api/v1/auth/permissions`
- **Features**:
  - JWT token management
  - Role-based access control
  - Permission management
  - Session handling

## Implementation Strategy

### Phase 1: CLI Refactoring

#### 1.1 Extract Core Features
```bash
# Keep in CLI (local operations)
- Environment setup (Docker, networking)
- Container management (start/stop/status)
- Basic configuration
- Local file operations

# Move to microservices
- Code review (OpenAI integration)
- CI/CD operations
- AI-powered features
- Deployment management
```

#### 1.2 Add API Communication Layer
```bash
# New CLI structure
devbox/
├── core/           # Local operations
├── api/            # API communication
├── auth/           # Authentication handling
├── config/         # Configuration management
└── commands/       # Command implementations
```

#### 1.3 Implement Authentication
```bash
# Authentication flow
devbox auth login --username=user --password=pass
devbox auth status
devbox auth logout
devbox auth refresh
```

### Phase 2: Microservices Development

#### 2.1 API Gateway
```yaml
# docker-compose.yml for development
version: '3.8'
services:
  api-gateway:
    image: nginx:alpine
    ports:
      - "8080:80"
    volumes:
      - ./gateway/nginx.conf:/etc/nginx/nginx.conf
      - ./gateway/ssl:/etc/nginx/ssl
    depends_on:
      - auth-service
      - review-service
      - cicd-service
      - ai-service

  auth-service:
    build: ./services/auth
    environment:
      - JWT_SECRET=your-secret-key
      - DATABASE_URL=postgresql://user:pass@db:5432/devbox

  review-service:
    build: ./services/review
    environment:
      - OPENAI_API_KEY=${OPENAI_API_KEY}
      - REDIS_URL=redis://redis:6379

  cicd-service:
    build: ./services/cicd
    environment:
      - DOCKER_HOST=unix:///var/run/docker.sock
      - JENKINS_URL=${JENKINS_URL}

  ai-service:
    build: ./services/ai
    environment:
      - OPENAI_API_KEY=${OPENAI_API_KEY}
      - ANTHROPIC_API_KEY=${ANTHROPIC_API_KEY}
```

#### 2.2 Service Communication
```bash
# CLI API calls
curl -X POST "https://api.devbox.com/v1/review/analyze" \
  -H "Authorization: Bearer $TOKEN" \
  -H "Content-Type: application/json" \
  -d '{
    "component": "chat",
    "files": ["src/main.py", "src/utils.py"],
    "options": {
      "severity": ["critical", "warning"],
      "include_suggestions": true
    }
  }'
```

### Phase 3: Role-Based Access Control

#### 3.1 Permission System
```yaml
# permissions.yaml
roles:
  developer:
    permissions:
      - code_review:read
      - cicd:build
      - ai:chat
      - ai:analyze
  
  senior_developer:
    permissions:
      - code_review:read
      - code_review:write
      - cicd:build
      - cicd:deploy
      - ai:chat
      - ai:analyze
      - ai:generate
  
  devops:
    permissions:
      - cicd:build
      - cicd:deploy
      - cicd:admin
      - deployment:read
      - deployment:write
  
  admin:
    permissions:
      - "*"  # All permissions
```

#### 3.2 Feature Access Control
```bash
# CLI checks permissions before making API calls
devbox review --component=chat
# CLI checks: user has 'code_review:read' permission
# If yes: proceed with API call
# If no: show permission denied error

devbox deploy --environment=production
# CLI checks: user has 'cicd:deploy' permission
# If yes: proceed with deployment
# If no: show permission denied error
```

## Security Benefits

### 1. **Code Protection**
- Sensitive implementation hidden in microservices
- CLI only contains basic setup and API communication
- No exposure of AI prompts, CI/CD logic, or security configurations

### 2. **Access Control**
- Role-based permissions for different features
- Authentication required for advanced operations
- Audit trails for all API calls
- Rate limiting to prevent abuse

### 3. **Data Privacy**
- Sensitive data processed on secure servers
- No local storage of API keys or credentials
- Encrypted communication between CLI and services
- Compliance with data protection regulations

## Maintenance Benefits

### 1. **Independent Updates**
- Microservices can be updated independently
- CLI updates only needed for basic functionality
- Feature rollouts without CLI redistribution
- A/B testing capabilities

### 2. **Scalability**
- Services can be scaled independently
- Load balancing across multiple instances
- Geographic distribution for better performance
- Resource optimization based on usage patterns

### 3. **Monitoring & Analytics**
- Centralized logging and monitoring
- Usage analytics and insights
- Performance metrics for each service
- Error tracking and alerting

## Migration Strategy

### Step 1: CLI Refactoring (Week 1-2)
```bash
# 1. Extract API communication layer
# 2. Add authentication handling
# 3. Implement permission checking
# 4. Create service stubs for testing
```

### Step 2: Basic Microservices (Week 3-4)
```bash
# 1. Set up API Gateway
# 2. Implement Authentication Service
# 3. Create Code Review Service
# 4. Add basic CI/CD Service
```

### Step 3: Advanced Features (Week 5-6)
```bash
# 1. Implement AI Services
# 2. Add comprehensive RBAC
# 3. Set up monitoring and logging
# 4. Performance optimization
```

### Step 4: Production Deployment (Week 7-8)
```bash
# 1. Security hardening
# 2. Load testing
# 3. Documentation updates
# 4. User training and migration
```

## CLI Commands After Migration

### Basic Commands (Local)
```bash
devbox init                    # Local environment setup
devbox start --component=chat  # Start local containers
devbox stop --component=chat   # Stop local containers
devbox status                  # Show local status
devbox deinit                  # Cleanup local environment
```

### Authentication Commands
```bash
devbox auth login              # Authenticate with DevBox API
devbox auth status             # Show authentication status
devbox auth logout             # Logout from DevBox API
devbox auth refresh            # Refresh authentication token
```

### Advanced Commands (API-based)
```bash
devbox review --component=chat # AI-powered code review
devbox package --component=chat # Build and package code
devbox deploy --env=staging    # Deploy to environment
devbox ai --prompt="..."       # AI assistance
devbox pipeline --action=build # CI/CD pipeline operations
```

### Configuration Commands
```bash
devbox config set api.url=https://api.devbox.com
devbox config set auth.token=your-token
devbox config show             # Show current configuration
devbox config reset            # Reset to defaults
```

## Benefits Summary

### For Platform Developers
- **Security**: Sensitive code protected in microservices
- **Control**: Role-based access to features
- **Analytics**: Usage insights and monitoring
- **Scalability**: Independent service scaling

### For End Users
- **Privacy**: Secure processing of sensitive data
- **Performance**: Optimized service delivery
- **Reliability**: Centralized monitoring and support
- **Features**: Access to advanced AI and CI/CD capabilities

### For Maintenance
- **Updates**: Independent service updates
- **Monitoring**: Centralized logging and alerting
- **Support**: Better error tracking and resolution
- **Compliance**: Audit trails and security controls

This architecture provides the perfect balance between functionality, security, and maintainability while enabling future growth and feature expansion.