Structure Supplier Contracts for Compliance Review with Kreuzberg and Haystack

"""
Production implementation for Structure Supplier Contracts for Compliance Review with Kreuzberg and Haystack.
Provides secure, scalable operations for compliance review processes.
"""

from typing import Dict, Any, List
import os
import logging
import time

# Setup logging for the application
logging.basicConfig(level=logging.INFO)
logger = logging.getLogger(__name__)

class Config:
    """
    Configuration class to manage environment variables.
    """
    database_url: str = os.getenv('DATABASE_URL', 'sqlite:///contracts.db')  # Default to SQLite
    retry_attempts: int = 5
    retry_delay: float = 2.0  # seconds

async def validate_input(data: Dict[str, Any]) -> bool:
    """
    Validate request data.
    
    Args:
        data: Input dictionary to validate
    Returns:
        bool: True if valid
    Raises:
        ValueError: If validation fails
    """
    if 'contract_id' not in data:
        raise ValueError('Missing contract_id')  # Raise error if contract_id is not provided
    if not isinstance(data['contract_id'], int):
        raise ValueError('contract_id must be an integer')  # Ensure contract_id is an integer
    return True  # Return True if validation passes

async def sanitize_fields(data: Dict[str, Any]) -> Dict[str, Any]:
    """
    Sanitize input fields to prevent injection.
    
    Args:
        data: Input dictionary to sanitize
    Returns:
        Dict[str, Any]: Sanitized input data
    """
    sanitized_data = {k: str(v).strip() for k, v in data.items()}  # Strip whitespace
    return sanitized_data  # Return sanitized data

async def fetch_data(contract_id: int) -> Dict[str, Any]:
    """
    Fetch contract data from the database.
    
    Args:
        contract_id: ID of the contract to fetch
    Returns:
        Dict[str, Any]: Contract data
    Raises:
        Exception: If fetching data fails
    """
    # Simulating data fetching (replace with actual DB calls)
    logger.info(f'Fetching data for contract_id: {contract_id}')  
    return {'contract_id': contract_id, 'details': 'Sample contract details'}  # Dummy data

async def process_batch(contract_ids: List[int]) -> List[Dict[str, Any]]:
    """
    Process a batch of contracts for compliance review.
    
    Args:
        contract_ids: List of contract IDs to process
    Returns:
        List[Dict[str, Any]]: List of processed contract data
    """
    results = []  # Initialize results list
    for contract_id in contract_ids:
        try:
            data = await fetch_data(contract_id)  # Fetch contract data
            results.append(data)  # Add data to results
        except Exception as e:
            logger.error(f'Error fetching data for contract_id {contract_id}: {e}')  # Log error
    return results  # Return the processed results

async def save_to_db(data: List[Dict[str, Any]]) -> None:
    """
    Save processed contract data to the database.
    
    Args:
        data: List of contract data to save
    Raises:
        Exception: If saving data fails
    """
    logger.info('Saving data to the database')  # Log saving action
    # Simulating database save (replace with actual DB calls)
    for item in data:
        logger.info(f'Saved: {item}')  # Log each item saved

async def call_api(data: Dict[str, Any]) -> None:
    """
    Call an external API for compliance checks.
    
    Args:
        data: Contract data to send to the API
    Raises:
        Exception: If API call fails
    """
    logger.info('Calling external compliance API')  # Log API call
    # Simulating API call (replace with actual API call)

async def aggregate_metrics(results: List[Dict[str, Any]]) -> Dict[str, Any]:
    """
    Aggregate metrics from processed results.
    
    Args:
        results: List of processed contract data
    Returns:
        Dict[str, Any]: Aggregated metrics
    """
    metrics = {'count': len(results)}  # Count of processed contracts
    logger.info(f'Aggregated metrics: {metrics}')  # Log aggregated metrics
    return metrics  # Return metrics

class ComplianceReview:
    """
    Main orchestrator for compliance review processes.
    """
    def __init__(self, config: Config) -> None:
        self.config = config  # Store configuration

    async def run(self, contract_ids: List[int]) -> None:
        """
        Execute compliance review for the given contract IDs.
        
        Args:
            contract_ids: List of contract IDs to review
        """
        logger.info(f'Starting compliance review for {contract_ids}')  # Log start
        await self.validate_and_process(contract_ids)  # Validate and process contracts

    async def validate_and_process(self, contract_ids: List[int]) -> None:
        """
        Validate inputs and process contract reviews.
        
        Args:
            contract_ids: List of contract IDs to validate and process
        """
        for contract_id in contract_ids:
            try:
                # Validate contract ID
                await validate_input({'contract_id': contract_id})  # Validate input
                # Sanitize fields
                sanitized = await sanitize_fields({'contract_id': contract_id})  # Sanitize input
                # Process batch
                results = await process_batch([sanitized['contract_id']])  # Process contract
                # Save processed data
                await save_to_db(results)  # Save to DB
                # Call API for compliance check
                await call_api(results[0])  # Call API
            except ValueError as ve:
                logger.warning(f'Validation error for contract_id {contract_id}: {ve}')  # Log validation error
            except Exception as e:
                logger.error(f'Processing error for contract_id {contract_id}: {e}')  # Log processing error

if __name__ == '__main__':
    # Example usage
    config = Config()  # Initialize configuration
    compliance_review = ComplianceReview(config)  # Create compliance review instance
    contract_ids = [1, 2, 3]  # Sample contract IDs
    # Run compliance review
    import asyncio
    asyncio.run(compliance_review.run(contract_ids))  # Run main process