"""Replay and forensic analysis for audit trails.

Provides tools for replaying operations, analyzing audit logs,
and forensic investigation of AI system behavior.
"""

import logging
from typing import Dict, List, Any, Optional
from datetime import datetime

logger = logging.getLogger(__name__)

__all__ = []


def validate_audit_record(record: Dict[str, Any]) -> bool:
    """Validate audit record structure.
    
    Args:
        record: Audit record to validate
        
    Returns:
        True if record is valid
        
    Raises:
        ValueError: If record validation fails
    """
    required_fields = ["timestamp", "operation", "status"]
    
    for field in required_fields:
        if field not in record:
            raise ValueError(f"Missing required audit field: {field}")
    
    logger.info("audit_record_validated")
    return True


def replay_operation(operation_record: Dict[str, Any]) -> Dict[str, Any]:
    """Replay a recorded operation for forensic analysis.
    
    Args:
        operation_record: Record of operation to replay
        
    Returns:
        Replay results and analysis
    """
    try:
        validate_audit_record(operation_record)
        
        logger.info(
            "operation_replay_started",
            extra={"operation": operation_record.get("operation")}
        )
        
        result = {
            "original_operation": operation_record,
            "replay_timestamp": datetime.utcnow().isoformat(),
            "status": "replayed"
        }
        
        logger.info("operation_replay_completed")
        return result
        
    except ValueError as e:
        logger.error("replay_validation_error", extra={"error": str(e)})
        raise


def generate_audit_summary(records: List[Dict[str, Any]]) -> Dict[str, Any]:
    """Generate summary of audit trail records.
    
    Args:
        records: List of audit records
        
    Returns:
        Summary statistics and analysis
    """
    try:
        total_records = len(records)
        successful = len([r for r in records if r.get("status") == "success"])
        failed = len([r for r in records if r.get("status") == "error"])
        
        summary = {
            "total_records": total_records,
            "successful_operations": successful,
            "failed_operations": failed,
            "generated_at": datetime.utcnow().isoformat()
        }
        
        logger.info(
            "audit_summary_generated",
            extra={
                "total": total_records,
                "successful": successful,
                "failed": failed
            }
        )
        
        return summary
        
    except Exception as e:
        logger.error("audit_summary_error", extra={"error": str(e)})
        raise
