# Enterprise-Grade Features

This document outlines the enterprise-grade features that have been added to the `@onwello/translation-cli` to make it production-ready for large-scale deployments.

## 🏢 Enterprise Features Overview

### 1. Configuration Management
- **Environment-based configuration**: Different settings for development, staging, and production
- **Configuration validation**: Automatic validation of configuration settings
- **Command-line overrides**: Override any configuration via command-line options
- **Environment variables**: Full support for environment variable configuration

### 2. Performance Monitoring
- **Real-time metrics**: Track processing speed, memory usage, and CPU usage
- **Progress tracking**: Visual progress bars with ETA and speed indicators
- **Concurrent processing**: Configurable parallel file processing
- **Performance optimization**: Automatic file size filtering and batch processing

### 3. Security & Validation
- **Input validation**: Comprehensive validation of all inputs
- **Output sanitization**: Automatic sanitization of potentially dangerous content
- **Path validation**: Security checks for file paths and traversal attempts
- **Content filtering**: Detection and handling of suspicious content

### 4. Advanced Logging
- **Structured logging**: JSON and text format support
- **Context-aware logging**: Log entries with context and metadata
- **File logging**: Log to files with rotation and buffering
- **Log levels**: Configurable log levels (debug, info, warn, error)

### 5. Error Handling & Recovery
- **Graceful error handling**: Continue processing even when individual files fail
- **Comprehensive error reporting**: Detailed error messages with context
- **Recovery mechanisms**: Automatic retry and fallback strategies
- **Validation reporting**: Detailed validation error and warning reports

## 🔧 Configuration

### Environment Variables

```bash
# Environment
NODE_ENV=production                    # development/staging/production
LOG_LEVEL=info                         # debug/info/warn/error
LOG_FORMAT=json                        # text/json
LOG_OUTPUT=both                        # console/file/both
LOG_FILE=/var/log/translation-cli.log # Log file path

# Performance
MAX_CONCURRENCY=8                      # Max concurrent file processing
MAX_FILE_SIZE=50                       # Max file size in MB
TIMEOUT=600                            # Operation timeout in seconds

# Security
VALIDATE_INPUTS=true                   # Enable input validation
SANITIZE_OUTPUTS=true                  # Enable output sanitization
MAX_KEY_LENGTH=200                     # Max translation key length

# Features
ENABLE_VALIDATION=true                 # Enable validation features
ENABLE_BACKUP=true                     # Enable backup features
ENABLE_DRY_RUN=true                    # Enable dry run features
ENABLE_PROGRESS_BAR=true               # Enable progress bar
```

### Configuration File

Create `.translation-cli.json` in your project root:

```json
{
  "version": "2.0.0",
  "environment": "production",
  "logging": {
    "level": "warn",
    "format": "json",
    "output": "both",
    "filePath": "/var/log/translation-cli.log"
  },
  "performance": {
    "maxConcurrency": 8,
    "maxFileSize": 50,
    "timeout": 600
  },
  "security": {
    "validateInputs": true,
    "sanitizeOutputs": true,
    "maxKeyLength": 200
  },
  "features": {
    "enableValidation": true,
    "enableBackup": true,
    "enableDryRun": true,
    "enableProgressBar": true
  }
}
```

## 🚀 Performance Features

### Concurrent Processing

The CLI now supports concurrent file processing to significantly improve performance:

```bash
# Process 8 files concurrently
translation extract --max-concurrency 8

# Environment variable
MAX_CONCURRENCY=8 translation extract
```

### File Size Filtering

Automatically skip files that are too large to process efficiently:

```bash
# Skip files larger than 50MB
translation extract --max-file-size 50

# Environment variable
MAX_FILE_SIZE=50 translation extract
```

### Progress Tracking

Real-time progress bars with speed and ETA information:

```bash
# Enable progress bar
translation extract --enable-progress-bar

# Environment variable
ENABLE_PROGRESS_BAR=true translation extract
```

## 🔒 Security Features

### Input Validation

All inputs are validated for security and correctness:

```bash
# Enable input validation
translation extract --validate-inputs

# Environment variable
VALIDATE_INPUTS=true translation extract
```

### Output Sanitization

Automatically sanitize outputs to prevent security issues:

```bash
# Enable output sanitization
translation extract --sanitize-outputs

# Environment variable
SANITIZE_OUTPUTS=true translation extract
```

### Path Validation

Security checks for file paths to prevent traversal attacks:

```typescript
// Automatically validates all file paths
const validation = validator.validatePath('/safe/path');
if (!validation.isValid) {
  // Handle invalid path
}
```

## 📊 Monitoring & Metrics

### Performance Metrics

Track detailed performance metrics:

```typescript
const metrics = performanceMonitor.endMonitoring();
console.log(`Duration: ${metrics.duration}ms`);
console.log(`Files Processed: ${metrics.filesProcessed}`);
console.log(`Total Keys: ${metrics.totalKeys}`);
console.log(`Memory Usage: ${metrics.memoryUsage}MB`);
console.log(`CPU Usage: ${metrics.cpuUsage}s`);
```

### Logging with Context

Structured logging with context and metadata:

```typescript
logger.info('Processing file', 'extraction', {
  file: 'auth/service.ts',
  size: '2.5MB',
  keys: 15
});
```

## 🛠️ Configuration Management

### Show Configuration

```bash
# Show current configuration
translation config show

# Show detailed configuration
translation config show --verbose
```

### Validate Configuration

```bash
# Validate current configuration
translation config validate
```

### Set Configuration Values

```bash
# Set log level
translation config set logging.level debug

# Set max concurrency
translation config set performance.maxConcurrency 8

# Set security settings
translation config set security.validateInputs true
```

### Reset Configuration

```bash
# Reset to default configuration
translation config reset
```

## 🔍 Validation System

### Translation Key Validation

```typescript
const validation = validator.validateTranslationKey({
  key: 'AUTH.USER_EXISTS',
  text: 'User already exists',
  type: 'EXCEPTION',
  file: '/path/to/file.ts',
  line: 10
});

if (!validation.isValid) {
  logger.logValidationErrors(validation.errors, 'extraction');
}
```

### Content Security

```typescript
// Detect suspicious content
const validation = validator.validateInputString(
  '<script>alert("xss")</script>',
  'user input'
);

if (validation.warnings.length > 0) {
  logger.logValidationWarnings(validation.warnings, 'security');
}
```

## 📈 Performance Optimization

### Batch Processing

Files are processed in configurable batches for optimal performance:

```typescript
// Process files in batches of 8
const batchSize = 8;
for (let i = 0; i < files.length; i += batchSize) {
  const batch = files.slice(i, i + batchSize);
  await Promise.allSettled(batch.map(processFile));
}
```

### Memory Management

Automatic memory usage tracking and optimization:

```typescript
const memoryUsage = process.memoryUsage();
const heapUsedMB = memoryUsage.heapUsed / 1024 / 1024;

if (heapUsedMB > 100) {
  logger.warning('High memory usage detected', 'performance');
}
```

## 🧪 Testing

### Enterprise Feature Tests

```bash
# Run enterprise feature tests
npm run test:enterprise

# Run performance tests
npm run performance:test

# Run validation tests
npm run validation:test
```

### Security Tests

```bash
# Run security audit
npm run security:audit

# Fix security issues
npm run security:fix
```

## 🔄 CI/CD Integration

### GitHub Actions Example

```yaml
name: Translation CLI Tests

on: [push, pull_request]

jobs:
  test:
    runs-on: ubuntu-latest
    
    steps:
    - uses: actions/checkout@v3
    
    - name: Setup Node.js
      uses: actions/setup-node@v3
      with:
        node-version: '18'
        cache: 'npm'
    
    - name: Install dependencies
      run: npm ci
    
    - name: Run tests
      run: npm test
    
    - name: Run enterprise tests
      run: npm run test:enterprise
    
    - name: Security audit
      run: npm run security:audit
    
    - name: Build
      run: npm run build
```

## 📋 Migration Guide

### From v1.0.0 to v2.0.0

1. **Update package.json**:
   ```json
   {
     "dependencies": {
       "@onwello/translation-cli": "^2.0.0"
     }
   }
   ```

2. **Create configuration file**:
   ```bash
   translation config show > .translation-cli.json
   ```

3. **Update environment variables**:
   ```bash
   export NODE_ENV=production
   export LOG_LEVEL=warn
   export MAX_CONCURRENCY=8
   ```

4. **Update CI/CD pipelines**:
   - Add enterprise tests
   - Add security audits
   - Add performance monitoring

## 🎯 Best Practices

### Production Deployment

1. **Use production environment**:
   ```bash
   NODE_ENV=production translation extract
   ```

2. **Enable all security features**:
   ```bash
   VALIDATE_INPUTS=true SANITIZE_OUTPUTS=true translation extract
   ```

3. **Configure logging**:
   ```bash
   LOG_FORMAT=json LOG_OUTPUT=both LOG_FILE=/var/log/translation-cli.log
   ```

4. **Set performance limits**:
   ```bash
   MAX_CONCURRENCY=8 MAX_FILE_SIZE=50 TIMEOUT=600
   ```

### Development

1. **Use development environment**:
   ```bash
   NODE_ENV=development translation extract
   ```

2. **Enable verbose logging**:
   ```bash
   LOG_LEVEL=debug translation extract -v
   ```

3. **Use dry run for testing**:
   ```bash
   translation replace --dry-run
   ```

## 🆘 Troubleshooting

### Common Issues

1. **High memory usage**:
   - Reduce `MAX_CONCURRENCY`
   - Reduce `MAX_FILE_SIZE`
   - Enable file filtering

2. **Slow processing**:
   - Increase `MAX_CONCURRENCY`
   - Check file sizes
   - Monitor system resources

3. **Validation errors**:
   - Check input files
   - Review configuration
   - Enable verbose logging

### Debug Mode

```bash
# Enable debug logging
LOG_LEVEL=debug translation extract -v

# Show detailed configuration
translation config show --verbose

# Validate configuration
translation config validate
```

## 📞 Support

For enterprise support and custom features:

- **Email**: enterprise@onwello.com
- **Documentation**: https://docs.onwello.com/translation-cli
- **Issues**: https://github.com/onwello/i18n-cli/issues
- **Enterprise**: https://onwello.com/enterprise

---

**Enterprise-Grade Translation CLI v2.0.0** - Built for scale, security, and performance. 🚀