components/ethical_learner.py

"""
Ethical Learner Module for TRuCAL

Integrates the RecursiveLearner with the existing EthicalProcessor
for a complete ethical reasoning and learning system.
"""

from typing import Dict, Any, Optional, Tuple
import torch
from .ethical_processor import EthicalProcessor
from .recursive_learner import RecursiveLearner

class EthicalLearner:
    """
    A unified ethical reasoning system that combines:
    - Rule-based ethical frameworks (from EthicalProcessor)
    - Case-based learning (from RecursiveLearner)
    """
    
    def __init__(self, 
                 casebase_path: str = 'casebase.json',
                 similarity_threshold: float = 0.6,
                 model_name: str = 'all-MiniLM-L6-v2',
                 d_model: int = 512):
        """
        Initialize the ethical learner.
        
        Args:
            casebase_path: Path to save/load the casebase
            similarity_threshold: Minimum similarity score (0-1) to consider a match
            model_name: Name of the sentence transformer model to use for embeddings
            d_model: Dimensionality of the ethical processor model
        """
        self.ethical_processor = EthicalProcessor(d_model=d_model)
        self.recursive_learner = RecursiveLearner(
            casebase_path=casebase_path,
            similarity_threshold=similarity_threshold,
            model_name=model_name
        )
    
    def process_query(self, query: str, context: Optional[Dict] = None) -> Dict[str, Any]:
        """
        Process an ethical query using both rule-based and case-based reasoning.
        
        Args:
            query: The ethical question or scenario
            context: Additional context for the query
            
        Returns:
            Dictionary containing the response and metadata
        """
        # First try to get a response from the case-based learner
        case_response, case_metadata = self.recursive_learner.get_response(query)
        
        # If we have a good match, use it
        if case_metadata.get('similarity', 0) >= self.recursive_learner.similarity_threshold:
            # Apply ethical processing to the case response
            ethical_analysis = self.ethical_processor.analyze(query)
            
            return {
                'response': case_response,
                'source': 'case_based',
                'confidence': case_metadata['similarity'],
                'case_id': case_metadata.get('case_id'),
                'ethical_analysis': ethical_analysis,
                'metadata': {
                    'case_metadata': case_metadata,
                    'ethical_frameworks': self.ethical_processor.get_active_frameworks()
                }
            }
        
        # If no good case match, use the ethical processor
        ethical_response = self.ethical_processor.process(query, context or {})
        
        return {
            'response': ethical_response,
            'source': 'rule_based',
            'confidence': 1.0,  # High confidence in rule-based responses
            'metadata': {
                'ethical_frameworks': self.ethical_processor.get_active_frameworks(),
                'development_phase': self.ethical_processor.get_development_phase()
            }
        }
    
    def add_case(self, question: str, response: str, tags: List[str] = None, 
                metadata: Optional[Dict] = None) -> Dict:
        """
        Add a new case to the casebase.
        
        Args:
            question: The ethical question or scenario
            response: The response or analysis
            tags: Optional list of tags for categorization
            metadata: Additional metadata about the case
            
        Returns:
            Dictionary with status and case information
        """
        case = self.recursive_learner.add_case(
            question=question,
            response=response,
            tags=tags,
            metadata=metadata or {}
        )
        
        return {
            'status': 'success',
            'case_id': id(case),
            'similarity': 1.0,  # New case, so perfect match to itself
            'total_cases': len(self.recursive_learner.casebase)
        }
    
    def provide_feedback(self, case_id: int, was_helpful: bool):
        """
        Provide feedback on a case's helpfulness.
        
        Args:
            case_id: The ID of the case
            was_helpful: Whether the response was helpful
        """
        self.recursive_learner.provide_feedback(case_id, was_helpful)
    
    def get_stats(self) -> Dict[str, Any]:
        """Get statistics about the ethical learner."""
        stats = self.recursive_learner.get_stats()
        stats.update({
            'ethical_frameworks': self.ethical_processor.get_active_frameworks(),
            'development_phase': self.ethical_processor.get_development_phase()
        })
        return stats
    
    def save(self):
        """Save the current state of the learner."""
        self.recursive_learner._save_casebase()
    
    def load(self):
        """Load the saved state of the learner."""
        self.recursive_learner._load_casebase()


# Example usage
if __name__ == "__main__":
    # Initialize the ethical learner
    learner = EthicalLearner()
    
    # Example query
    query = "Is it ethical to use personal data for targeted advertising?"
    result = learner.process_query(query)
    
    print(f"Query: {query}")
    print(f"Response: {result['response']}")
    print(f"Source: {result['source']}")
    print(f"Confidence: {result['confidence']:.2f}")
    
    # Add a new case
    print("\nAdding new case...")
    learner.add_case(
        question="What are the ethics of data privacy in AI?",
        response=("Data privacy in AI involves balancing innovation with individual rights. "
                 "Key considerations include informed consent, data minimization, purpose limitation, "
                 "and ensuring transparency about how data is used."),
        tags=["privacy", "AI", "ethics"]
    )
    
    # Get stats
    print("\nLearner statistics:")
    print(learner.get_stats())