#!/usr/bin/env python3
"""
Feature Engineering Pipeline
Production-grade tool for senior data scientist
"""

import os
import sys
import json
import logging
import argparse
from pathlib import Path
from typing import Dict, List, Optional
from datetime import datetime

logging.basicConfig(
    level=logging.INFO,
    format='%(asctime)s - %(levelname)s - %(message)s'
)
logger = logging.getLogger(__name__)

class FeatureEngineeringPipeline:
    """Production-grade feature engineering pipeline"""
    
    def __init__(self, config: Dict):
        self.config = config
        self.results = {
            'status': 'initialized',
            'start_time': datetime.now().isoformat(),
            'processed_items': 0
        }
        logger.info(f"Initialized {self.__class__.__name__}")
    
    def validate_config(self) -> bool:
        """Validate configuration"""
        logger.info("Validating configuration...")
        # Add validation logic
        logger.info("Configuration validated")
        return True
    
    def process(self) -> Dict:
        """Main processing logic"""
        logger.info("Starting processing...")
        
        try:
            self.validate_config()
            
            # Main processing
            result = self._execute()
            
            self.results['status'] = 'completed'
            self.results['end_time'] = datetime.now().isoformat()
            
            logger.info("Processing completed successfully")
            return self.results
            
        except Exception as e:
            self.results['status'] = 'failed'
            self.results['error'] = str(e)
            logger.error(f"Processing failed: {e}")
            raise
    
    def _execute(self) -> Dict:
        """Execute main logic"""
        # Implementation here
        return {'success': True}

def main():
    """Main entry point"""
    parser = argparse.ArgumentParser(
        description="Feature Engineering Pipeline"
    )
    parser.add_argument('--input', '-i', required=True, help='Input path')
    parser.add_argument('--output', '-o', required=True, help='Output path')
    parser.add_argument('--config', '-c', help='Configuration file')
    parser.add_argument('--verbose', '-v', action='store_true', help='Verbose output')
    
    args = parser.parse_args()
    
    if args.verbose:
        logging.getLogger().setLevel(logging.DEBUG)
    
    try:
        config = {
            'input': args.input,
            'output': args.output
        }
        
        processor = FeatureEngineeringPipeline(config)
        results = processor.process()
        
        print(json.dumps(results, indent=2))
        sys.exit(0)
        
    except Exception as e:
        logger.error(f"Fatal error: {e}")
        sys.exit(1)

if __name__ == '__main__':
    main()